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HomeMy WebLinkAbout20030060 Ver 1_Complete File_20040702G WA rF Michael F. Easley, Governor 9 William G. Ross Jr., Secretary QG North Carolina Department of Environment and Natural Resources 7 Alan W. Klimek, P.E., Director r ? Division of Water Quality 0 .? Coleen H. Sullins, Deputy Director Division of Water Quality July 2, 2004 Mecklenburg County DWQ Project # 03-0060 Crosland Land Company Attn: Mr. Bill Gartland 141 Scaleybark Road Charlotte, NC 28209 Subject Property: Threatt/Beaver/Mattis Tract APPROVAL of Stormwater Management Plans Dear Mr. Gartland: Staff of the Division of Water Quality have reviewed the revised level spreader plans submitted by your engineer (Brent T. Niemann, P.E., ESP Associates) dated May 20, 2004 (received May 26, 2004). This plan satisfies the condition of the 401 Water Quality Certification issued to you on May 6, 2003. As stated in that Certification, this stormwater management facility must be constructed and operational and the stormwater management plan implemented. All other conditions of the Certification are still applicable and must be followed. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone John Dorney at 919-733-9646 or Cynthia Van Der Wiele at 919.715-3473. Sincerely, Wi R. Dorney DWQ, Manage JRD/cvdw Cc: USACE Asheville Regulatory Field Office DWQ Mooresville Regional Office File Copy Central Files Brent T. Niemann, ESP Associates, PO Box 7030, Charlotte, NC 28241 DWQ # 03-0060 Stormwater N. C. Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650 (Maihng Address) 2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location) (919) 733-1786 (phone), 919-733-6893 (fax), (http://h2o.enr.state.nc.us/ncwetlands ESP ASSOCIATES, P.A. P.O. Box 7030 CHARLOTTE, NORTH CAROLINA 28241 (704) 583-4949 TO I?GDsrJ/ Wkwari of t?A'rsn. ooA wry (ol :;? MAIL 5?R-?,.rr?? q!9- 333- g?21 WE ARE SENDING YOU )(Attached ? Under separate cover via ? Shop drawings ? Prints [7 Copy of letter ? Change order C] Plans 11 the following items: [l Samples 1-1 Specifications COPIES DATE NO. DESCRIPTION Z Wj ? [fi \NFULANDSI 1401 GROUP THESE ARE TRANSMITTED as checked below: J For approval For your use [_1 As requested [ I Approved as submitted [ ! Approved as noted [ Returned for corrections L I For review and comment [ I I Resubmit i_] Submit Return -copies for approval copies for distribution corrected prints C1 FOR BIDS DUE 1 - PRINTS RETURNED AFTER LOAN TO US REMARKS r ERE v?I ?9?Et,R-Da2. D5 _Ppl_oJ1?- N1?7-ln?C- t?/ 9E IF COPY TO 17 7ff lpl LJ \JIP' 4Gt3L? ]?[ ?4 uQ? EAT[ O? JOB NO. ?6U ATTENTION RE: tit?4 ? t?t ? ,4a 0044 af-77r?e.4W,? DOQ t'>3 -CeXao SIGNED: If enclosures are not as noted, kindly notify us at F WAIF Michael F. Easley, Governor `O?? qpG William G. Ross Jr., Secretary / North Carolina Department of Environment and Natural Resources ??-- Alan W. Klimek, P.E. Director Division of Water Quality May 5, 2003 DWQ# 03-0060 Mecklenburg County Mr. Bill Gartland Crosland Land Company 141 Scaleybark Road Charlotte, NC, 28209 APPROVAL of 401 Water Quality Certification with Additional Conditions Dear Mr. Gartland: You have our approval, in accordance with the attached conditions, to place permanent fill in 0.47 acre of wetlands and up to 145 linear feet of perennial streams in order to construct a residential subdivision on the Threatt/Beaver/Mattis tract in Mecklenburg County, as described in your revised application received by the Division of Water Quality on April 1, 2003. After reviewing your application, we have determined that this fill is covered by General Water Quality Certification Number 3402, which can be viewed on our web site at http://h2o.enr.state.nc.us/ncwetlands. This Certification allows you to use Nationwide Permit Number 39 when it is issued by the U.S. Army Corps of Engineers. In addition, you should get any other federal, state or local permits before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Non-Discharge and Water Supply Watershed regulations. Also this approval will expire when the accompanying 404 permit expires unless otherwise specified in the General Certification. This Certification replaces the one issued to you on March 14, 2003. This approval is only valid for the purpose and design that you described in your application. If you change your project, you must notify us in writing and you may be required to send us a new application for a new certification. If the property is sold, the new owner must be given a copy of the Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h). For this approval to be valid, you must follow the conditions listed in the attached certification, as well as the additional condition listed below: 1. Deed notifications or similar mechanisms shall be placed on all lots with remaining jurisdictional wetlands and waters or areas within 50 feet of all streams and ponds on the property. These mechanisms shall be put in place within 30 days of the date of this letter or the issuance of the 404 Permit (whichever is later). A sample deed notification format can be downloaded from the 401/Wetlands Unit web site at http://h2o.enr.state.nc.us/ncwetlands ; 2. An additional condition is that a final, written stormwater management plan shall be approved in writing by this Office before the impacts specified in this Certification occur. The stormwater management plan must include plans and specifications for diffuse flow of all stormwater through existing buffers based on the Level Spreader Design Guidance at http://h2o.ehnr.state.nc.us/ncwetlands/level.pdf. These facilities must be designed to treat the runoff from the entire project, unless otherwise explicitly approved by the Division of Water Quality. Also, before any permanent building is occupied at the subject site, the facilities (as approved by this Office) shall be constructed and operational, and the stormwater management plan (as approved by this Office) shall be implemented. The structural stormwater practices as approved by this Office as well as drainage patterns must be maintained in perpetuity. No changes to the structural stormwater practices shall be made without written authorization from the Division of Water Quality; 3. You are required to return the attached Certification of Completion form to notify DWQ when all work included in the 401 Certification has been completed. If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone Mike Parker in our Mooresville Regional Office at 704-663-1699 or Cyndi Karoly in the Central Office in Raleigh 919-733-9721. Sincerely, Alan W. Klimek, P.E. N. C. Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 (919) 733-7015 Customer ' 1 800 6, Triage Check List Date: 03 Project Name: 7 ea.a12r )A'4't? ?- DWQ#: 0- -®O(o County: M ??e?? To: ? ARO Mike Parker ? WaRO Tom Steffens ? FRO A•vexitte____ ? WiRO Noelle Lutheran ,, ?D 0 ?"? , (: A; Johnson -) _ _., ? WSRO C ndi Karol y y y (Central Office) ? RRO Steve Mitchell From: 6'? Telephone : (919) 3 -S?Z(o The file attached is being forwarded to your for your evaluation. Please call if you need assistance. ? Stream length impacted ? Stream determination ? Wetland determination and distance to blue-line surface waters on USFW topo maps ? Minimization/avoidance issues ? Buffer Rules (Meuse, Tar-Pamlico, Catawba, Randleman) ? Pond fill ? Mitigation Ratios ? Ditching ? Are the stream and or wetland mitigation sites available and viabl° ? Check drawings for accuracy Is the application consistent with pre-application meetings? emulative impact concern Comments: Ova Gny? ?.r?.. °?5??c4 d"??,?°c.?- 1`-? Zc?c?? • - I* Threatt/Beaver/Mattis Tract Mecklenburg County, North Carolina Joint Application Form and Supporting Documentation for NATIONWIDE PERMITS THAT REQUIRE NOTIFICATION TO CORPS OF ENGINEERS NATIONWIDE PERMITS THAT REQUIRE SECTION 401 CERTIFICATION CONCURRENCE Prepared for: Mr. Bill Gartland Crosland Land Company 141 Scaleybark Road Charlotte, N.C. 28209 Prepared By: Leonard S. Rindner, PWS Environmental Planning Consultant 3714 Spokeshave Lane Matthews, NC 28105 1-(704) 846-0461 Fit[ COPY Project Revision of Previously Issued 401 WQC DWQ #03-0060 and Action Id. 200330403 WENNVS14 Q1 GA4UP APR ??03 wArEA 1 QuAU?ys??r ?4N Threatt/Beaver/Mattis Tract Mecklenburg County, North Carolina Joint Application Form and Supporting Documentation for NATIONWIDE PERMITS THAT REQUIRE NOTIFICATION TO CORPS OF ENGINEERS NATIONWIDE PERMITS THAT REQUIRE SECTION 401 CERTIFICATION CONCURRENCE Prepared for: Mr. Bill Gartland Crosland Land Company 141 Scaleybark Road Charlotte, N.C. 28209 Prepared By: Leonard S. Rindner, PWS Environmental Planning Consultant 3714 Spokeshave Lane Matthews, NC 28105 1-(704) 846-0461 Project Revision of Previously Issued 401 WQC DWQ #03-0060 and Action Id. 200330403 Office Use Only: Form Version May 2002 USACE Action ID No. DWQ No. (If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".) L Processing 1. Check all of the approval(s) requested for this project: ® Section 404 Permit ? Riparian or Watershed Buffer Rules ? Section 10 Permit ? Isolated Wetland Permit from DWQ Z 401 Water Quality Certification 2. Nationwide, Regional or General Permit Number(s) Requested: 3. If this notification is solely a courtesy copy becaus( REVISED 3/27/03 is not required, check here: ? 4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for mitigation of impacts (verify availability with NCWRP prior to submittal of PCN), complete section VIII and check here: ? If your project is located in any of North Carolina's twenty coastal counties (listed on page 4), and the project is within a North Carolina Division of Coastal Management Area of Environmental Concern (see the top of page 2 for further details), check here: ? IL Applicant Information Owner/Applicant Information ?/ // a??_ Name: Mailing Address: 7 F Telephone Number: 7c?-t (o/ S 22! Fax Number: 0 E-mail Address: 2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory a thority for the owner/applicant.) Name: a?oP in??ar ?tJ? Company Affiliation: .-on •,I G.- 4•,•1, Cps Mailing Address: 171-6 ?4E/?cwf , ?l ZdI?X` Telephone Number: 70't G ? Fax Number: __?0Y 7 o b?- E-mail Address: Dorm C ,.f 17 III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version ^? *1,° 4•" ^;_° ~'-~- Tr a-" -e reduced to a small scale such that the final vers' THREATT/BEAVER/MATTIS TRACT I the project has been placed on hold until de ' era _ 1. Name of project: 2. T.I.P. Project Number or State Project Number (NCDOT Only): 3. Property Identification Number (Tax PIN): 4 5. Site coordinates, if available (UTM or Lat/Long): (Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) 48 ACRES 6. Property size (acres): ` 7. Nearest body of water (stream/river/sound/ocean/lake):/? 8. River Basin: (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http://h2o.enr.state.nc.us/admin/m4ps/.) 9. Describe the existing conditions on the si a and general land use in the vi mity of the project at the time of this, Plication: T D- 4 of 11 Location County: Me_ ? A, lb/r Nearest Town: Subdivision name (include p se/lot number): 10. 11. IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with V. Future Project Plans Are any future permit requests anticipated for this project? If so, describe the anticipated work, and narovide iustification for the exclusion of tbis work from the current applicatign. VL Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. The applicant must also provide justification for these impacts in Section VII below. All proposed impacts, permanent and temporary, must be listed herein, and must be clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. D-I of 17 1. Provide a written description of the proposed impacts:1,? ct 2. Individually list wetland impacts below: Wetland Impact Site Number indicate on ma Type of Impact* Area of Impact acres Located within 100-year Floodplain** es/no Distance to Nearest Stream ear feet Type of Wetland*** w)o 3 -7 - Loa SS p P oIQ • List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing, grading, tui, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. •• 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or online at httn://www.fem&aov. •" List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, (forested wetland, beaver pond, Carolina Bay, bog, etc.) Indicate if wetland is isolated (determination of isolation to be made by USACE only). List the total acreage (estimated) of all existing wetlands on the property: + Total area of wetland impact proposed: ± ,''f-7 ir-r-,-c 3. Individually list all intermittent and perennial stream impacts below: Stream Impact Site Number (indicate on ma) Type of Impact* Length of Impact (linear feet) Stream Name** Average Width of Stream Before Impact Perennial or Intermittent? lease ) *21y IP r o of - ar 0r rw t " List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap, dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain), stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributarv) to the nearest downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358- at www.usgs.sov. Several intemet sites also allow direct download and printing of USGS maps (e _ ±145 LF n, www.mauauest.com, etc.). Cumulative impacts (linear distance in feet) to all streams on site: -66 ,,o D-4 of 11 4. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U. S.) below: Open Water Impact Site Number indicate on ma Type of Impact* Area of Impact acres Name of Waterbody (if applicable Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc. List each impact separately and identify temporary impacts. Impacts include, but are not limited to: fill, excavation, mwigmg, flooding, drainage, bulkheads, etc. 5. Pond Creation If constriction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ? uplands ? stream ? wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be follow during c nstructio to reduce impacts. !cam Vaclir /`u VIII. Mitigation ?,. &u r'/.vim , I i? vo(u. (?f-?lyur NJ? I7'?,I??I'YIJk ?? ???? ?? l!? ?u C?C?p?f Grs? S??.Clr?rvl ?/ ??? DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. CO ?rcS?o( I? (,6vv?rv?w? UsG.c? . ROAD CROSSINGS ARE REQUIRED TO ACCESS AND CONNECT TO EXISTING PROPERTY SUBDIVISIONS IMPACTS TO STREAMS WILL BE MINIMIZED BY USE OF HEADWALLS. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on March 9, 2000, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://h2o.enr.state.nc.us/ncwetlands/strrnstide.html. Provide a brief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not limited to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a description of the current site conditions and proposed method of construction. Please attach 2. Mitigation may also be made by payment into the Worth Carolina Wetlands Restoration Program (NCWRP). Please note it is the applicant's responsibility to contact the NCWRP at (919) 733-5208 to determine availability and to request written approval of mitigation prior to submittal of a PCN. For additional information regarding the application process for the NCWRP, check the NCWRP website at http://h2o.enr.state.nc.us/vnp/index.htm. If use of the NCWRP is proposed, please check the appropriate box on page three and provide the following information: Amount of stream mitigation requested (linear feet): Amount of buffer mitigation requested (square feet): Amount of Riparian wetland mitigation requested (acres): Amount of Non-riparian wetland mitigation requested (acres): Amount of Coastal wetland mitigation requested (acres): w" ck 'le " 7:1 r Donn 10 of 11 IX. Environmental Documentation (required by DWQ) Does the project involve an expenditure of public (federal/state) funds or the use of public (federal/state) land? Yes ? No If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ? No ? If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ? No ? X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify )? Yes ? No ? If you answered "yes", provide the following information: Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. * Zone Impact (square feet Multiplier Required Mitigation 1 3 2 1.5 Total * Zone 1 extends out 30 feet perpendicular from near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. Dorm 11 of 1'1 If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 2B .0242 or.0260. XL Stormwater (required by DWQ) Describe impervious acreage (both existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands downstream from the ropes. P6 rte. ZIA I Oddt ?'?-. JD? ?-? ? /`aL?l cX? C? r bl)A - S,p1 rsi>- Ool v.,?, 1 . t7 0?+ l of too' XII. Sewage Disposal ( quired by DWQ) Si-e tc "% /M yiavs oy?•? l l Clearly detail the ultimate treatment methods an disposition (non-discharge or discharge) of was ew to ,,ggenerated fr t e ro osed rq jeFt, or available capacity of the subject facility. XUL Violations (required by DWQ) Is this site in violation of DW,J^etland Rules (15A NCAC 2H.0500) or any Buffer Rules? Yes ? No F1 lication? Is this an after-the-fact perep, Yes ? No XIV . Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). 2-,-- Applicant/Agent's Signature ' Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) D- 17 of 17 LEONARD S. RINDNER, PWS Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 March 28, 2003 Mr. Steve Chapin US Army Corps of Engineers - Reg. Field Office 151 Patton Avenue - Room 208 Asheville, NC 28801 - 5006 Mr. John R. Dorney Division of Water Quality - NCDENR 2321 Crabtree Boulevard, Suite 250 Raleigh, NC 27604 Mr. Mike Parker NCDENR - Division of Water Quality 919 North Main Street Mooresville, NC 28115 Re Threatt Beaver Mattis Tract - Approximately 48 acres, Mecklenburz County North Carolina - Nationwide Permit #39 Dear Sirs: On behalf of my client, Mr. Bill Gartland of Crosland Land Company, I am requesting authorization to utilize Nationwide Permit #39 to impact + 0.47 acres of wetlands and 150 linear feet of intermittent to perennial stream to develop the proposed single family community. There are no proposed impacts to the 2500 linear feet of stream on the project site. As depicted on the plan the remaining wetlands and streams will be protected within common open space. To mitigate for the proposed wetland impacts areas of the floodplain including wetlands are proposed to be enhanced. Stormwater will be filtered over the large buffer areas utilizing level spreading devices. There are no direct discharges of stormwater to any creek. The following sections present the results of the environmental planning and a description of the impacts with proposed minimization and mitigation measures. SUMMARY OF WATERS OF THE D.S. Methodology Preliminary identification and delineation of the Jurisdictional Waters on the site were determined according to the Corps of Engineers Wetland Delineation Manual, Technical Report Y-87-1, 1987, with Appendices. Preliminary data gathering included review and interpretation of topographic maps; USDA Soil Conservation Survey; aerial photographs, and preliminary site visits to selected areas. Then the Routine On-Site Determination Method was utilized to determine the upper boundary of the wetlands. In order to make a positive wetland determination indicators of hydrophytic vegetation, hydric soil, and wetland hydrology must be identified as described in the manual. March 28, 2003, Page 3 ThreattBeaver/Mattis Tract Background The site is within the headwaters of perennial tributaries of Flat Branch and Flat Branch of the Catawba Basin (Water Classification - Q. The majority of the site is flat to slightly sloping. The current land-use is undeveloped woodland areas and existing single family residential property. There are several drainage channels and drainage patterns on the site that were constructed to facilitate drainage. Description Wetland Hydrology an d Hydric Soils These riparian areas can be classified as Palustrine Forested Broad Leaved and Scrub Shrub (PFOIA, PFO I C, PSS I A). According to the North Carolina Resource Conservation Service, Technical Guide- Section II-A-2, June 1991, Monacan (Mo) soils and Iredell (IrA) soils are listed as Map Units with inclusions of Hydric Soils in Mecklenburg County. The streams on the site are intermittent and perennial. Characteristics include persistent pools, small riffle and pool complexes (a "special aquatic site") in the perennial streams, and rocky, gravelly, and sandy channel substrate. Vegetation in riparian and along tributaries is dominated by Facultative Wet Vegetation. Jurisdictional Waters of the U.S. and North Carolina 1) Flat Branch (+ 13001f) 2) Perennial Streams (+ 1,500 If) 3) Wetlands ± 0.50 acres ± 0.20 acres + 1.50 acres Total + 2.20 acres Proposed Impacts to Jurisdictional Waters of the U.S. and North Carolina 1) Flat Branch (+ 1300 If) 2) Perennial Streams (+ 145 If) 3) Wetlands + 0.00 acres + 0.02 acres + 0.47 acres Total ± 0.49 acres PROPOSED MINIMIZATIONAND MITIGATION The following Best Management Practices will be employed and strictly enforced to minimize impacts to Jurisdictional Waters. These will include: a) Siltation Barriers; Sediment Traps and Diversion Ditches b) Barricades to define construction limits to sensitive sites and to protect trees c) Methods to prevent short term impacts will be inspected regularly and maintained during construction of the project. d) Project construction will strictly adhere to an approved Sedimentation and Erosion Control Plan. Best Management Practices will include utilizing siltation trapping ponds and other erosion control structures where appropriate. Impacts from hazardous materials and other toxins to fish and aquatic life such as fuels will be avoided by not permitting staging areas to be located near March 28, 2003, Page 4 ThreattBeaver/Mattis Tract surface waters. e) As required by the 401 Water Quality Certification conditions, measures will be taken to prevent "live" or fresh concrete from coming into contact with waters until the concrete has hardened. MITIGATION PLAN Stormwater and Wetland Enhance Plan The purpose of the mitigation plan is to enhance the development of wetlands in various forms, which are saturated within the root zone or inundated for a significant portion of the growing season in the floodplain of Flat Branch. The restored and/or created wetlands will provide water storage, bank stabilization, pollutant removal, and aquatic resource values as described in the Fourth Version - Guidance for Rating Values of Wetlands in North Carolina. The expected saturation and inundation will lead to the development of Bottomland Hardwoods, Scrub/Shrub, Emergent, and Aquatic wetland zones. It is expected that the wetlands created and or enhanced will meet or exceed the wetland areas filled by the development of this project in the non-wetland floodplain as the result of the proposed measures and will be conducted on approximately a 2:1 basis. Stormwater runoff, overland flow, flooding, captured rainfall, and a seasonal high water table will support the hydrology of these potential wetland areas. To allow a saturated soil development, Coir fiber (coconut) logs will be used to help impound water and can be installed by hand. They will be lived staked to create a more natural hummock. The density of the log can be modified, thereby holding or allowing varying amounts of water to be impounded. These microtopographic features will create the various hydrological zones. Habitat Enhancement Wetland zones adjacent to surface waters improve water quality by filtering runoff, trapping sediment, absorbing nutrients, and provide wildlife habitat and a food source for aquatic organisms, amphibians, birds and other wildlife. Currently the vegetation of the floodplain is dominated by exotic and introduced non- native species such as Chinese Privet, Nepalese Cordgrass, Russian Olive, Japanese Rose, and Japanese Honeysuckle. The creation and restoration of wetland habitats will gradually cause the existing non-native vegetation to transition to native Obligate (OBL) and Facultative Wet (FACW) vegetation such as Black Willow, Silky Dogwood, Green Ash, Oak species, Soft Rush, Jewelweed, Duck Potato, and Tear-Thumb. Other vegetation which may volunteer include a diversity of saturation tolerant tree species which are also high in wildlife value include buttonbush, arrowood, elderberry, and spicebush. STORMWATER MANAGEMENT PLAN The impervious percentage for development is approximately 28%. The developed portion of the site is approximately 38%. Based on a preliminary review of the site with Todd St. John of NCDWQ, the develop is proposing to utilize a Level Spreader Design to filter runoff from the development in the large undeveloped and flat floodplain. The design will be based on guidance provided in Draft Level Spreader Design Options - Version 1.0. with Preformed Scour Holes as recommended by Todd St. John. The guidance is an attachment to this report. March 28, 2003, Page 5 ThreattBeaver/Mattis Tract PROTECTION FROM FUTURE DEVELOPMENT Remaining streams and wetlands will be protected in common open space or within rear of lots. As required, deed notifications or similar mechanisms will be placed on all lots with remaining jurisdictional wetlands and waters or areas within 50 feet of al streams and ponds on the property. COMPLIANCE WITH WETLAND REGULATIONS In accordance with Title 15 NCAC 2H.0500, the following DEED NOTIFICATION shall be recorded in the County Registry prior to the conveyance of lots. Said Deed Notification shall apply to (name of subdivision), lot numbers in County, North Carolina as shown on plans titled (subdivision name) prepared by ( name of designer) dated date: "A portion of this lot has been determined to meet the requirements for designation as a regulatory wetland. Any subsequent fill or alteration of this wetland shall conform to the requirements of the state wetland rules adopted by the State of North Carolina in force at the time of the proposed alteration. The intent of this provision is to prevent additional wetland fill, so the property owner should not assume that a future application for fill would be approved. The property owner shall report the name of the subdivision in any application pertaining to said wetland rules. This covenant is intended to ensure continued compliance with wetland rules adopted by the State of North Carolina and, therefore, benefits may be enforced by the State of North Carolina. This covenant is to run with the land and shall be binding on all Parties and all persons claiming under them." (Signature) Owner's name Address City, state, zip Phone Number: STATE OF NORTH CAROLINA COUNTY 1, , a Notary Public of the State of North Carolina, County, hereby certify that owner personally appeared before me this day and executed by above certification. Witness my hand and notarial seal, this day of , 2003 (Notary public) My commission expires March 28, 2003, Page 6 Threatt/Beaver/Mattis Tract THREATENED AND ENDANGERED SPECIES Federally listed plant and animal species with endangered or threatened status are protected under the Endangered Species Act of 1973. The US Fish and Wildlife Service has identified Schweinitz's sunflower and the Carolina heelsplitter. Schweinitz's sunflower thrives in full sun characteristic of succession fields, margins, and forested openings. Based on a site reconnaissance, habitat conducive to support the Schweinitz's sunflower does not appear to be present in the proiect area. The Carolina heelsplitter is a freshwater mussel, which prefers shaded areas either, in a ponded portion of a small stream or in runs along steep banks with moderate current. Primary habitat is waters less than three feet deep with a soft mud, muddy sand, or shady gravelly substrate. It is normally restricted to protected silted areas or under banks especially associated with obstructions such as stumps or fallen trees. The current distribution according to the U.S. Fish and Wildlife Service is limited to portions of two streams -- Goose Creek and Waxhaw Creek -- and a small river originating from rural areas in Union County. Therefore it is not expected to occur on this site. CULTURAL RESOURCES The project site is disturbed from previous agricultural activities. No structures were found on the site. The State Historic Preservation Office may review of the USGS maps at the Office of State Archaeology and the Survey and Planning Office of the North Carolina Department of Cultural Resources to determine if sites are indicated on the National Historic Register within the study area. AQUATIC HABITAT The aquatic systems in the project area consist of wetlands and streams in the Catawba Basin. A variety of wildlife is supported by these systems including mammals, birds, reptiles, amphibians, fish, insects, mollusks, and crustaceans. Therefore strict adherence to an approved erosion and sedimentation control plan will be maintained during the construction period in order to control degradation of water quality downstream and protect the areas to be preserved. Best Management Practices will include utilizing siltation trapping ponds and other erosion control structures where appropriate. Impacts from hazardous materials and other toxins to fish and aquatic life such as fuels will be avoided by not permitting staging areas to be located near surface waters. Also, as required by the 401 Water Quality Certification conditions, measures will be taken to prevent "live" or fresh concrete from coming into contact with waters until the concrete has hardened. Aquatic resources are expected to be enhanced through the restoration of wetland areas that flood and pond for longer durations. CONCLUSION Based on the value of the jurisdictional waters and wetlands on this site, the developer through sensitive site planning has chosen to balance the site's economic viability with its environmental value and permitability. The goal of the Site Plan and Mitigation Plan is to help balance the environmental consequences of this development by protecting waters downstream of the project and to preserve and enhance important wetland and stream habitats on the site. U.S. ARMY CORPS OF ENGINEERS WILMINGTON DISTRICT Action Id. 200330403 county Mecklenburg GENERAL PERMIT (REGIONAL AND NATIONWIDE) VERIFICATION Property owner: Crosland Land Company, Att'n: Mr. Bill Gartland 141 Scaleybark Rd. Charlotte, NC 28209 Telephone No.: Size and Location of project (water body, road name/number, town, etc.): Threatt/Beaver Tract located on approx. 40 acre site in between Rea Road and Tom Short Road accessed by Threatt Vail Road; in south Charlotte Description of Activity: Impact 0.47 acre of wetlands in association with the construction of a residential subdivision. Mitigation to offset the loss of aquatic resource will be accomplished through creation of approx. 1.0 acre of wetlands adjacent to Flat Branch. The mitigation must be done in strict accordance with submitted plans. SPECIAL CONDITION: A REPORT SUMMARIZING THE SUCCESS OF THE MITIGATION MUST BE SUBMITTED WITHIN ONE YEAR OF THE DATE OF THIS AUTHORIZATION. Applicable Law: X Section 404 (Clean Water Act, 33 U.S.C. 1344). (check all that apply) Section 10 (River and Harbor Act of 1899). Authorization: Regional General Permit Number. 39 Nationwide Permit Number. Your work is authorized by this Regional General (RGP) or Nationwide Permit (NWP) provided it is accomplished in strict accordance with the attached conditions and your submitted plans. If your activity is subject to Section 404 (if Section 404 block above is checked), before beginning work, you must also receive a Section 401 water quality certification from the N.C. Division of Water Quality, telephone (919) 733-1786. For any activity within the twenty coastal counties, before beginning work you must contact the N.C. Division of Coastal Management, telephone (919)733-2293. Please read and carefully comply with the attached conditions of the RGP or NWP. Any violation of the conditions of the RGP or the NWP referenced above may subject the permittee to a stop work order, a restoration order, and/or appropriate legal action. This Department of the Army RGP or NWP verification does not relieve the permittee of the responsibility to obtain any other required Federal, State, or local approvals/permits. The permittee may need to contact appropriate State and local agencies before beginning work. If there are any questions regarding this authorization or any of the conditions of the General Permit or Nationwide Permit, please contact the Corps Regulatory Official specified below. ?0? W A TARP ?O P r March 14, 2003 DWQ# 03-0060 Mecklenburg County Mr. Bill Gartland Crosland Land Company 141 Scaleybark Road Charlotte, NC, 28209 APPROVAL of 401 Water Quality Certification with Additional Conditions a+,° Dear Mr. Gartland: You have our approval, in accordance with the attached conditions, to place permanent fill in 0.47 acre of wetlands in order to construct a residential subdivision on the Threatt Beaver tract in Mecklenburg County, as described in your application received by the Division of Water Quality on January 22, 2003. After reviewing your application, we have determined that this fill is covered by General Water Quality Certification Number 3362, which can be viewed on our web site at htto://h2o.enr.state.nc.us/ncwetlands. This Certification allows you to use Nationwide Permit Number 39 when it is issued by the U.S. Army Corps of Engineers. In addition, you should get any other federal, state or local permits before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Non-Discharge and Water Supply Watershed regulations. Also this approval will expire when the accompanying 404 permit expires unless otherwise specified in the General Certification. This approval is only valid for the purpose and design that you described in your application. If you change your project, you must notify us In writing and you may be required to send us a new application for a new certification. If the property is sold, the new owner must be given a copy of the Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h). For this approval to be valid, you must follow the conditions listed in the attached certification, as well as the additional condition listed below: 1. Deed notifications or similar mechanisms shall be placed on all lots with remaining jurisdictional wetlands and waters or areas within 50 feet of all streams and ponds on the property. These mechanisms shall be put in place within 30 days of the date of this letter or the issuance of the 404 Permit (whichever is later). A sample deed notification format can be downloaded from the 401/Wetlands Unit web site at htto:Hh2o.enr.state.nc.us/ncwetlands ; 2. An additional condition is that a final, written stormwater management plan shall be approved in writing by this Office before the impacts specified in this Certification occur. The stormwater management plan must include plans and specifications for diffuse flow of all stormwater through existing buffers based on the Level Spreader Design Guidance at http://h2o.ehnr.state.nc.us/ncwetlands/level.pdf. These facilities must be designed to treat the runoff from the entire project, unless otherwise explicitly approved by the Division of Water Quality. Also, before any permanent building is occupied at the subject site, the facilities (as approved by this Office) shall be constructed and operational, and the stormwater management plan (as approved by this Office) shall be implemented. The structural stormwater practices as approved by this Office as well as drainage patterns must be maintained in perpetuity. No changes to the structural stormwater practices shall be made without written authorization from the Division of Water Quality; 3. You are required to return the attached Certification of Completion form to notify DWQ when all work included in the 401 Certification has been completed. If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 1508 of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone Mike Parker in our Mooresville Regional Office at 704-663-1699 or Cyndi Karoly in the Central Office in Raleigh 919-733-9721. A N. C. Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617V (919) 733-7015 Michael F. Easley, Uovemor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of Water Quality Customer Service 1 800 623-7748 r I -?T---r ;r r- ?1 /( mac- ;- \--- --'\-1- z;' \ 55 •- • - I _ • / ! I I PLO 0 of 0 r •?? . M • 1 • - - - - - - - - - - - - - Z, Y i ? ?a o rn cc J 11\I Lam,' 1 .il I - /JJ ,. - S ?- LID Q ( N N \ C 1 I I ?? 10 I f!1 1\ 1 1 I/ J -In / LL ". I l l III / rn J I __? W _?_ 1 1 1 1 rn r e ? -l- ? I cn rn 'r cr) CL I _--_--_ Z + t' JO I II - 1 & I \ Q 0 Cf) -If)- CC cl O\ UJ co Z N Q ~ a / Z I Z \,II 1 a O CL J d LL Q I - ?\ \ W j'Ij I s I J co to ° W \ 0 1 \ ` I 2L 0 O Z \ Cf) r IL / ?_ I I N N N \ Q ° N I I \\ W a W M CID I I to ~ W p \\ n 1 1 %/ I n U Ill N \ I1 I U?l Z \ I I , ?' - O W O O -- a: co 1 \\ \ d O M1 Q ----- =`\ \ / `\ N \ ` \ 1 ) I\ 1\ I ?1\ I r ?.fl \ _\ 0 '1 ?j?\ } y\ \V M \ \? \ELOPENT 0 ?\ \?`J \\ \\ 1\ ? ,? EXISTING DE V , ,, \\\y\? II\?4\ `\ \\ i +/' \ ? 1 ??t Q z ; \\ 1\li? ? \\ \\ ???\\??\ ?\L? low I m V"U /\ I 4 A ?ro9 _ 1 I Z Arm 75? ty"I ONVuFj VU 4b -r • I I y a as I I M? J • • I >; i I LL Z ? ?OrD1 ? ? Y?\ o og M11! ? ??? /? a I ?w? - I Z car 14• Q ? ri ? ?? 1 I = p p V*N N a' W - ---I ?y Q ? Q o'vir u ? ? ? I I ?'?? LL LIJ Gk H LU a - LL. W 8 +I w 1 ?• Z I f?s? V -?---i I ? • I w ? Q ? ,ter ?? J I - j ?W/ I, ® a Q Z ?? s b 0 y J? o '? J of P ?,-s= ? Ell W L.U I= III N'J W p \ Z 0 ? 0??1M1 ? kl'n ? ? \ w a CL ??? d ' FINAL DESIGN OF ROAD CROSSINGS. WILL BE DESIGNEES IN ACCORDANCE WITH THE FOLLOWING FEDERAL AND STATE CONDITIONS e. For all NWPs that involve the construction of culverts, measures will be included in the construction that will promote the safe passage of fish and other aquatic organisms. All culverts in the 20 CAMA coastal counties must be buried to a depth of one foot below the Roa*-r A"zmck PM a.?tten CkI I Lmaa bebw stud to appummilte sty apts. Bottom bed of the stream or wetland. For all culvert construction activities, the dimension, pattern, and profile of the stream, (above and below a pipe or culvert), should not be modified by widening the stream channel or by reducing the depth of the stream. Culvert inverts will be buried at least one foot below the bed of the stream for culverts greater than 48 inches in diameter. For culverts 48 inches in diameter or smaller, culverts must be buried below the bed of the stream to a depth equal to or greater than 20 percent of the diameter of the culvert. Bottomless arch culverts will satisfy this condition. A waiver from the depth specifications in this Regional Condition may be requested in writing. The waiver will only be issued if it can be demonstrated that the impacts of complying with this Regional Condition would result in more adverse impacts to the aquatic environment. 3. Additional Regional Conditions Applicable to this Specific Nationwide Permit. a. Natural channel design must be applied to the maximum extent practicable for stream relocations. The N.C. Wildlife Resources Commission and the N.C. Division of Water Quality provides Guidelines that are available to assist in the planning and design. b. Bank-full flows (or less) shall be accommodated through maintenance of the apn?? rnt R-iww L Cuivut b®ed Bin enw sh?aml?d to;ppmpsime Nf w st.;.m Mwkap Bottom existing bank-full channel cross sectional area. Additional culverts at such crossings shall be allowed only to receive flows exceeding bank-full. c. Flows exceeding bank-full shall be accommodated by installing culverts at the floodplain elevation where adjacent floodplain is available. d. NWP 14 cannot be used for private projects located in tidal waters or tidal wetlands. e. The activities associated with NWP 14 require a pre-construction notification if they will result in the loss of greater than 150 total linear feet of perennial streambed or intermittent stream that exhibits important aquatic function(s). ApPM&FM EkVatiDn 9. Placement of culverts and other structures in waters, streams, and wetlands must be placed below the elevation of the streambed to allow low flow passage of water and aquatic life unless; it can be shown to DWQ that providing passage would be impractical. Design and placement of culverts including open bottom or bottomless arch culverts and other structures including temporary erosion control measures shall not be conducted in a manner that may result in aggradation, degradation or significant changes in hydrology of wetlands or stream beds or banks, adjacent to or upstream and down stream of the above structures. The applicant is required to provide evidence that the equilibrium shall be maintained if requested to do so in writing by DWQ. Additionally, when roadways, causeways or other fill projects are constructed across FEMA-designated floodways or wetlands, openings such as culverts or bridges must be provided to maintain the natural hydrology of the system as well as prevent constriction of the floodway that may result in aggradation, degradation or significant changes in hydrology of streams or wetlands; ?Q \ (L6zo `Jd een eo) n4 -? ao 1lv3aru 'a Tuna vJ? lC- l6i -6z IL m .*930.99 N .99 - 00S J I I I ? I? I ? I o {?1m 4D 9 oil _Xrg.e, 9v S saw Oil m -- Ll l Zil rl bl i zo-? I?a? F7 ? ? 1? p aw I r? ---- O'n e o ? -I $Iq z? - n I / n t- N V I I I I d a ?[> J N h 3( e J - _ ?u `? o L I a J N a 3 I' I' it _ / e?Y ?"°?93 ?? 3 ?? Wig` ? ? ` `? ?' r ? o b5so A. 19 11, g?3r m I h Threatt/Beaver Tract Mecklenburg County, North Carolina Joint Application Form and Supporting Documentation for NATIONWIDE PERMITS THAT REQUIRE NOTIFICATION TO CORPS OF ENGINEERS NATIONWIDE PERMITS THAT REQUIRE SECTION 401 CERTIFICATION CONCURRENCE Prepared for: Mr. Bill Gartland Crosland Land Company 141 Scaleybark Road Charlotte, N.C. 28209 Prepared By: Leonard S. Rindner, PWS Environmental Planning Consultant 3714 Spokeshave Lane Matthews, NC 28105 1-(704) 846-0461 Office Use Only: Form Version May 2002 USAGE Action ID No. DWQ No. (If any particular item is not applicable to this project, please eftm Not Applicable" or "N/A".) L Processing 1. Check all of the approval(s) requested for this project: ® Section 404 Permit ? Riparian or Watershed Buffer Rules ? Section 10 Permit ? Isolated Wetland Permit from DWQ Z 401 Water Quality Certification #?3f 2. Nationwide, Regional or General Permit Number(s) Requested: 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ? 4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for mitigation of impacts (verify availability with NCWRP prior to submittal of PCN), complete section VIII and check here: ? 5. If your project is located in any of North Carolina's twenty coastal counties (listed on page 4), and the project is within a North Carolina Division of Coastal Management Area of Environmental Concern (see the top of page 2 for further details), check here: ? IL Applicant Information 1. Owner/Applicant Information / mamp / [ ?u Mailing Telephone Number: 70'? /ol G_24-2/ Fax Number: c 22 5/ E-mail Address: 2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory airthority for the owner/applicant.) Name: - L.Cin ar? f- i7-- ,r f-kCJ( ,T_ Company Affiliation: ?unr ?• `/?-+?? Mailing Address: 371.6 <1,6 F-e<Ak? s , Telephone Number: 70'f 6 Fax Number: -_70Y UJ bC E-mail Address: U.-r.nfl) III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes,, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project: /, 1 0-- ? 2. T.I.P. Project Number or State Project Number (NCDOT Only): 3. Property Identification Number (Tax PIN): 4. Location / 4. j County: M,nZvY Nearest Town: C• Subdivision name (include p of number): 5. 6. Property size (acres): t 'Z/D i-'tC.Y-e ?- 7. Nearest body of water (stream/river/sound/ocean/lake):/Ct 8. River Basin: (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http://h2o.enr.state.nc.us/admin/maps/.) 9. Describe the existing conditions on the si#e and general land i1se in the viiiinity of the project at the time of this ,application: 1Z STS e:2? Dn- A nF 11 Site coordinates, if available (UTM or Lat/Long): (Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) 10. 11. IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with V. Future Project Plans Are any future permit requests anticipated for this project? If so, describe the anticipated work, and nrovide iustification for the exclusion of tbip work from the current application. VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. The applicant must also provide justification for these impacts in Section VII below. All proposed impacts, permanent and temporary, must be listed herein, and must be clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. D-Iof 17 1. Provide a written description of the proposed impacts:.! ? Lt - 2. Individually list wetland impacts below: Wetland Impact Site Number indicate on map) Type of Impact* Area of Impact acres Located within 100-year Floodplain** Distance to Nearest Stream feet Type of Wetland*** wp ? - 4,00 2W d im but ede incl»de acts Im are not limited to: me chanized clearing grading, fill, , p p ? List each impact separatdy raentrfy temporary excavation, flooding, ditx hing/dramage, etc. For dams, separately list impacts due to both structure and flooding. ** 100-Year floodplams are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM), or FEMA aplxoved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or online at httpVNw,fema¢ov. sss List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond, Carolina Bay, bog, etc.) Indicate if wetland is isolated (determination of isolation to be made by USACE only). List the total acreage (estimated) of all existing wetlands on the property: + Total area of wetland impact proposed: f 47 Atr..cc 3. Individually list all intermittent and perennial stream impacts below: Stream site Number (indicate on map) Type of Impact* Length of Impact (linear feet Stream Name** Average Width of Stream Before Impact Perennial or Intermittent? lease specif ) * List eArh irnn„rt te?nnormv imne cts. Impacts include, but are not limited to: culve rts and associated rip-rap, dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain), stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included •' Stream names can be found on USGS topographic maps. If a stream bas no name, list as UT (unmmed tributary) to the nearest downstream named stream into which it flows. USGS maps are available through the USGS at 14800-358-9616, or online at www.usas.eov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.toRgzpne.com, www.mMuest.com, etc.). Cumulative impacts (linear distance in feet) to all streams on site: -A?? Gcr? ± 2500 ? c1F ?'u ar-? On - Dn-4 of 17 4. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U.S.) below: Open Water Impact Site Number indicate on map) Type of impact* Area of impact acres Name of Waterbody (if applicable) 'lope of Waterbody Oake estuary , pond, ' sound, bay, etc. • T;.* -U ;--OF r onsrntAw fMVt ;AnrAifv tLTtt1fY7 RV imnscts_ hnnects include- bat We not lr1 nited tO: iWy C=Vati0n, dredging, IIooding, drainage, bulkheads, etc. 5. Pond Creation if construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this a plication. Pond to be created in (check all that apply): ? uplands [f stream ? wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be follow during nstructio to reduce impacts. VIIL Mitigation ?.rr J-? /')9.??yYldu ova, A? Cu G Ir-O?r 6rs1.s N XC DWQ - In accord nce with 15A NCAC 2H .0500, mitigation may be required y the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. GiO ,p??Sf of I ^ (,Qyvu?ww? U?rS?G.t..L . Dn- Oof V) 0 USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on March 9, 2000, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http•//h2o enr state nc us/ncwetlands/strmgide.html. Provide a brief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not limited to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), ; and a description of the current site conditions and proposed method of construction. Please attach ?a /separate /sheet if-more space is n ed. / 1AIV eir%4"w( PSI Coy/744 G4A "MA [Dq-C 74c S?7.c- 15 I-/so C vh,?C.c-? 16 3 ?r r /-1 f? v F[G 2. Mitigation may also be made by payment into the Worth Carolina Wetlands Restoration Program (NCWRP). Please note it is the applicant's responsibility to contact the NCWRP at (919) 733-5208 to determine availability and to request written approval of mitigation prior to submittal of a PCN. For additional information regarding the application process for the NCWRP, check the NCWRP website at bap //h2o enr state nc us/wrp/mdex htm. If use of the NCWRP is proposed, please check the appropriate box on page three and provide the following information: Amount of stream mitigation requested (linear feet): Amount of buffer mitigation requested (square feet): Amount of Riparian wetland mitigation requested (acres): Amount of Non-riparian wetland mitigation requested (acres): Amount of Coastal wetland mitigation requested (acres): ?jGcst or\ Cv.,,ro?? rr }c,l--? a Z I Don. I A nF 17 (mss/ IX. Environmental Documentation (required by DWQ) Does the project involve an expenditure of public (federal/state) funds or the use of public (federal/state) land? Yes ? No L?r If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ? No ? If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ? No ? X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the, DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify )? Yes ? No ? If you answered "yes", provide the following information: Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. zone* (Ware feet) Multiplier Mfigfffion 1 3 2 1.5 Total * Zone 1 extends out 30 feet perpendicular from near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. D- 1 1 of 1'1 If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 2B .0242 or.0260. XL Stormwater (required by DWQ) Describe impervious acreage (both existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands r ck t-luvuxa C"a r br'ecF4-?? r?i?- ?: XIL Sewage Disposal ( aired by DWQ) G? Clearly detail the ultimate treatment methods . ?? or e VI??-S I o? 1 . i? Oc-* 10 io 01 an disposition (no 'scharge or discharge) of , or available capacity of the subject facility. XUL Violations (required by DWQ) Is this site in violation of DWQ'Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules? Yes ? No Ff Is this an after-the-fact pplication? Yes ? No XIV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and_ Threatened Species, accessibility problems, or other issues outside of the applicant's control). 2-,-- Of/??3 Applicant/Agent's Signature Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) n...... ,II ..cin LEONARD S RINDNEX PW S Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 January 19, 2003 Mr. Steve Chapin US Army Corps of Engineers - Reg. Field Office 151 Patton Avenue - Room 208 Asheville, NC 28801 - 5006 Mr. John R Dorney Division of Water Quality - NCDENR 2321 Crabtree Boulevard, Suite 250 Raleigh, NC 27604 Mr. Mike Parker NCDENR - Division of Water Quality 919 North Main Street Mooresville, NC 28115 Re: Threatt Beaver Tract Approximately 40 acres, Mecklenbure County. North Carolina - Nationwide Permit #39 Dear Sirs: On behalf of my client, Mr. Bill Gartland of Crosland Land Company, I am requesting authorization to utilize Nationwide Permit #39 to impact + 0.47 acres of wetlands to develop the proposed single family community. There are no proposed impacts to the 2500 linear feet of stream on the project site. As depicted on the plan the remaining wetlands and streams will be protected within common open space. To mitigate for the proposed wetland impacts areas of the floodplain including wetlands are proposed to be enhanced. Stormwater will be filtered over the large buffer areas utilizing level spreading devices. There are no direct discharges of stormwater to any creek. The following sections present the results of the environmental planning and a description of the impacts with proposed minimization and mitigation measures. SUMMARY OF WATERS OF THE U.S Methodoloav Preliminary identification and delineation of the Jurisdictional Waters on the site were determined according to the Corps of Engineers Wetland Delineation Manual, Technical Report Y-87-1, 1987, with Appendices. Preliminary data gathering included review and interpretation of topographic maps; USDA Soil Conservation Survey; aerial photographs, and preliminary site visits to selected areas. Then the Routine On-Site Determination Method was utilized to determine the upper boundary of the wetlands. In order to make a positive wetland determination indicators of hydrophytic vegetation, hydric soil, and wetland hydrology must be identified as described in the manual. January 19, 2002, Page 3 Threatt/Beaver Tract Backeround The site is within the headwaters of perennial tributaries of Flat Branch and Flat Branch of the Catawba Basin (Water Classification - Q. The majority of the site is flat to slightly sloping. The current land-use is undeveloped woodland areas and existing single family residential property. There are several drainage channels and drainage patterns on the site that were constructed to facilitate drainage. Description Wetland Hvdrolosv and Hydric Soils These riparian areas can be classified as Palustrine Forested Broad Leaved and Scrub Shrub (PFO 1 A, PF01C, PSS1A). According to the North Carolina Resource Conservation Service, Technical Guide- Section H-A-2, June 1991, Monacan (Mo) soils and Iredell (IrA) soils are listed as Map Units with inclusions of Hydric Soils in Mecklenburg County. The streams on the site are intermittent and perennial. Characteristics include persistent pools, small riffle and pool complexes (a "special aquatic site") in the perennial streams, and rocky, gravelly, and sandy channel substrate. Vegetation in riparian and along tributaries is dominated by Facultative Wet Vegetation. Jurisdictional Waters of the U.S. and North Carolina 1) Flat Branch (± 13001f) 2) Perennial Streams (± 1,200 lf) 3) Wetlands + 0.50 acres + 0.16 acres + 1.50 acres Total ± 2.16 acres Proposed Impacts to Jurisdictional Waters of the U.S. and North Carolina 1) Flat Branch (± 1300 lf) 2) Perennial Streams (± 1,200 If) 3) Wetlands ± 0.00 acres ± 0.00 acres ± 0.47 acres Total ± 0.47 acres PROPOSED MINIMIZA TION AND MITIGATION The following Best Management Practices will be employed and strictly enforced to minimize impacts to Jurisdictional Waters. These will include: a) Siltation Barriers; Sediment Traps and Diversion Ditches b) Barricades to define construction limits to sensitive sites and to protect trees c) Methods to prevent short term impacts will be inspected regularly and maintained during construction of the project. d) Project construction will strictly adhere to an approved Sedimentation and Erosion Control Plan. Best Management Practices will include utilizing siltation trapping ponds and other erosion control structures where appropriate. Impacts from hazardous materials and other toxins to fish and aquatic life such as fuels will be avoided by not permitting staging areas to be located near January 19, 2002, Page 4 Threatt/Beaver Tract surface waters. e) As required by the 401 Water Quality Certification conditions, measures will be taken to prevent "live" or fresh concrete from coming into contact with waters until the concrete has hardened. MITIGATION PLAN Stormwater and Wetland Enhance Plan The purpose of the mitigation plan is to enhance the development of wetlands in various forms, which are saturated within the root zone or inundated for a significant portion of the growing season in the floodplain of Flat Branch. The restored and/or created wetlands will provide water storage, bank stabilization, pollutant removal, and aquatic resource values as described in the Fourth Version - Guidance for Rating Values of Wetlands in North Carolina. The expected saturation and inundation will lead to the development of Bottomland Hardwoods, Scrub/Shrub, Emergent, and Aquatic wetland zones. It is expected that the wetlands created and or enhanced will meet or exceed the wetland areas filled by the development of this project in the non-wetland floodplain as the result of the proposed measures and will be conducted on approximately a 2:1 basis. Stormwater runoff, overland flow, flooding, captured rainfall, and a seasonal high water table will support the hydrology of these potential wetland areas. To allow a saturated soil development, Coir fiber (coconut) logs will be used to help impound water and can be installed by hand. They will be lived staked to create a more natural hummock. The density of the log can be modified, thereby holding or allowing varying amounts of water to be impounded. These microtopographic features will create the various hydrological zones. Habitat Enhancement Wetland zones adjacent to surface waters improve water quality by filtering runoff, trapping sediment, absorbing nutrients, and provide wildlife habitat and a food source for aquatic organisms, amphibians, birds and other wildlife. Currently the vegetation of the floodplain is dominated by exotic and introduced non-native species such as Chinese Privet, Nepalese Cordgrass, Russian Olive, Japanese Rose, and Japanese Honeysuckle. The creation and restoration of wetland habitats will gradually cause the existing non-native vegetation to transition to native Obligate (OBL) and Facultative Wet (FACW) vegetation such as Black Willow, Silky Dogwood, Green Ash, Oak species, Soft Rush, Jewelweed, Duck Potato, and Tear- Thumb. Other vegetation which may volunteer include a diversity of saturation tolerant tree species which are also high in wildlife value include buttonbush, arrowood, elderberry, and spicebush. STORMWATER MANAGEMENT PLAN The impervious percentage for development is approximately 28%. The developed portion of the site is approximately 38%. Based on a preliminary review of the site with Todd St. John of NCDWQ, the develop is proposing to utilize a Level Spreader Design to filter runoff from the development in the large undeveloped and flat floodplain. The design will be based on guidance provided in Draft Level Spreader Design Options - Version 1.0. with Preformed Scour Holes as recommended by Todd St. John. The guidance is an attachment to this report. January 19, 2002, Page 5 ThreattBeaver Tract PROTECTION FROM FUTURE DEVELOPMENT Remaining streams and wetlands will be protected in common open space. As required, deed notifications or similar mechanisms will be placed on all lots with remaining jurisdictional wetlands and waters or areas within 50 feet of al streams and ponds on the property. COMPLIANCE WITH WETLAND REGULATIONS In accordance with Title 15 NCAC 211.0500, the following DEED NOTIFICATION shall be recorded in the County Registry prior to the conveyance of lots. Said Deed Notification shall apply to (name of subdivision), lot numbers in County, North Carolina as shown on plans titled (subdivision name) prepared by ( name of designer) dated date: "A portion of this lot has been determined to meet the requirements for designation as a regulatory wetland. Any subsequent fill or alteration of this wetland shall conform to the requirements of the state wetland rules adopted by the State of North Carolina in force at the time of the proposed alteration. The intent of this provision is to prevent additional wetland fill, so the property owner should not assume that a future application for fill would be approved. The property owner shall report the name of the subdivision in any application pertaining to said wetland rules. This covenant is intended to ensure continued compliance with wetland rules adopted by the State of North Carolina and, therefore, benefits may be enforced by the State of North Carolina. This covenant is to run with the land and shall be binding on all Parties and all persons claiming under them." (Signature) Owner's name Address City, state, zip Phone Number: STATE OF NORTH CAROLINA COUNTY I, a Notary Public of the State of North Carolina, County, hereby certify that owner personally appeared before me this day and executed by above certification. Witness my hand and notarial seal, this day of , 2003 (Notary public) My commission expires January 19, 2002, Page 6 Threatt/Beaver Tract THREATENED AND ENDANGERED SPECIES Federally listed plant and animal species with endangered or threatened status are protected under the Endangered Species Act of 1973. The US Fish and Wildlife Service has identified Schweinitz's sunflower and the Carolina heelsplitter. Schweinitz's sunflower thrives in full sun characteristic of succession fields, margins, and forested openings. Based on a site reconnaissance, habitat conducive to support the Schweinitz's sunflower does not appear to be present in the project area. The Carolina heelsplitter is a freshwater mussel, which prefers shaded areas either, in a ponded portion of a small stream or in runs along steep banks with moderate current. Primary habitat is waters less than three feet deep with a soft mud, muddy sand, or shady gravelly substrate. It is normally restricted to protected silted areas or under banks especially associated with obstructions such as stumps or fallen trees. The current distribution according to the U.S. Fish and Wildlife Service is limited to portions of two streams - Goose Creek and Waxhaw Creek -- and a small river originating from rural areas in Union County. Therefore it is not expected to occur on this site. CULTURAL RESOURCES The project site is disturbed from previous agricultural activities. No structures were found on the site. The State Historic Preservation Office may review of the USGS maps at the Office of State Archaeology and the Survey and Planning Office of the North Carolina Department of Cultural Resources to determine if sites are indicated on the National Historic Register within the study area. AQUATIC HABITAT The aquatic systems in the project area consist of wetlands and streams in the Catawba Basin. A variety of wildlife is supported by these systems including mammals, birds, reptiles, amphibians, fish, insects, mollusks, and crustaceans. Therefore strict adherence to an approved erosion and sedimentation control plan will be maintained during the construction period in order to control degradation of water quality downstream and protect the areas to be preserved. Best Management Practices will include utilizing siltation trapping ponds and other erosion control structures where appropriate. Impacts from hazardous materials and other toxins to fish and aquatic life such as fuels will be avoided by not permitting staging areas to be located near surface waters. Also, as required by the 401 Water Quality Certification conditions, measures will be taken to prevent "live" or fresh concrete from coming into contact with waters until the concrete has hardened. Aquatic resources are expected to be enhanced through the restoration of wetland areas that flood and pond for longer durations. CONCLUSION Based on the value of the jurisdictional waters and wetlands on this site, the developer through sensitive site planning has chosen to balance the site's economic viability with its environmental value and permitability. The goal of the Site Plan and Mitigation Plan is to help balance the environmental consequences of this development by protecting waters downstream of the project and to preserve and enhance important wetland and stream habitats on the site. N ?I - ?i Izsv a? Off- / \ I I I I Z I I r Wvw worn v nog e ? aoou? . V i Q p3j 'Wru 04 rlrr,?„ 4b • i 8 W a _ o SAMMUMOMI i i Q a ?_ I I 5 - I I 33 33 4s u o . ? Mppp I So `? eta W(U I I --_ ?- O$, a I psi u O _ LJL tlt F,y,? Yn O i -' - d+" N N- W - --I Z ? ? ? ? I I I m I. I N I LIJ Q 2 Ix CL CA) W Z I g l ®? I •I V ?n ? _- J I I Z g? ° W a - - - - r - / / I J as G _ _. I aIONA rrM J?NI10M VMW 6 ? I I - ® I I cXL I I N W Z O '? a0'? 11 ?ynd \ CL , I CL iC S?'4 ?y?4H LEONARD S. RINDNER. PWS Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 December 23, 2002 Mr. Bill Gartland Crosland Land Company 135 Scaleybark Road Charlotte, NC 28209 Dear Bill: A wetland and stream determination and delineation was conducted at the proposed project site. An area is determined to be a wetland when it exhibits Hydric Soil, Hydrophytic Vegetation, and Wetland Hydrology characteristics. These characteristics are required to be in accordance with the definitions in the U.S. Army Corps Wetland Delineation Manual, 1987. Areas, which exhibit these three characteristics, are identified as a wetland and permits may be required for development activities within these areas. Surface waters such as perennial and intermittent creeks are also subject to Section 404 of the Clean Water Act. Isolated wetlands are regulated by the North Carolina Department of Environment and Natural Resources. Wetland Survey The delineation should now be surveyed. These areas are approximately indicated on the attached map, however this map should not be used as an accurate representation of wetland and stream extents. A survey would determine the actual extents more accurately and clarify the regulatory issues and potential mitigation conditions, if necessary. The attached map is for illustrative purposes only. A survey is required for the USACE to make a final jurisdictional determination on the property. The flags used to define the wetlands are blue numbered sequentially as roughly depicted on the attached map. A slash (n next to the number indicates a connection. All notes on the flags should be recorded. The point numbers must appear on the survey in a clear and legible manner. The centerline of all streams must be surveyed with approximate width of the stream identified. Once the preliminary survey is conducted it will need to be reviewed by me to make sure that the connections are as intended. Additional site visits and coordination with the surveyor may be required if areas need to be extended to meet the property lines or for clarification. The map will need to be produced based on the following requirements. Areas that may need further evaluation may require a revision to the survey, if required. Metes and bounds tied to a property corner or other known point or listing of the northings and eastings (NC Coordinate Grid). 2. Location of each point identified to be included on the map. Property lines of the entire property or parcel. Mapped floodplains and contours should be included on the map, if possible. Mr. Bill Gartland Wetland Survey, Page 2 4. Wetland boundaries should be closed into distinct polygons. Acreage should be indicated for each polygon. It is helpful to have the polygons identified (i.e. Area "A", etc.). Surface waters such as perennial and intermittent channels should also be identified calculated in acreage and linear feet. The areas should then be listed in a table and totaled. The map should have a vicinity map, north arrow, scale, project name property owner and/or developer including name, address, telephone number, size of tract. 6. The surveyor must seal the survey. Longitude and Latitude at the approximate center of the site must be shown. The following note needs to be shown on the map for the USACE to sign: Wetland Certification This certifies that this copy of this plat accurately depicts the boundary of jurisdiction of Section 404 of the Clean Water Act as determined by the undersigned on this date. Unless there is a change in the law of our published regulations this determination of Section 404 jurisdiction may be relied upon for a period not to exceed five (5) years from this date. This determination was made utilizing the 1987 Corps of Engineers Wetland Delineation Manual. Name: (signed by U. S. Army Corps of Engineers) Title: Date: At least four sealed copies should forwarded to me for submittal to the USACE for their certification. Please let me know if you have any questions or require further explanation. S. Rindner, PWS nental Planning Consultant BASE MAP COURTESY OF MECK. CO.OIS APPROXIMATE MAP - WATERS OF THE U.S. FOR SURVEY AND STUDY PURPOSES ONLY SUBJECT TO U.S.A.C.E. VERIFICATION AI 1 4,? J .4 i USGS QUAD-WEDDINGTON FLOODPLAINS AND BUFFERS it1 ? ? ?5,?{s? 44? x'S ? ?d'YJ o .y W Ye +14. ? W Ig ?: r may. Y? ? A 2 / A??' a ? v a' r r X V s .. '. 4 j ? £y Y t y W ^ yq -0 w W i h ? Lti ? t7 y W7 A-M {1 + N z 1 wY r ,: k F 2. ? y t ' ? ,? k N ? may, / r 17J?r t 3$4 : a 4i16? 1 Z LEONARD S. WNDNER PW S Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 December 9, 2002 Mr. Bill Gartland Crosland Land Company 135 Scaleybark Road Charlotte, NC 28202 Re: Preliminary Wetland/Stream Evaluation - Threatt-Vail Site. Mecklenburg County. NC Dear Bill: The proposed project site was visited at your request, to identify the presence of wetlands and surface waters that would require permitting if they were impacted by development. An area is determined to be a wetland when it exhibits Hydric Soil, Hydrophythic Vegetation, and Wetland Hydrology characteristics. These characteristics are required to be in accordance with the definitions in the U.S. Army Corps Wetland Delineation Manual, 1987. Areas that exhibit these three characteristics are identified as a wetland and permits are required for development activities within these areas. Surface waters such as perennial and intermittent creeks, and certain ponds are also subject to Section 404 and Section 401 of the Clean Water Act. The approximate extent of the Waters of the U.S. are depicted on the map are based on an analysis of site characteristics, topographic and soil maps, and an on-site review. Stream and Wetland Hydrology, Hydric Soil, Hydrophytic Vegetation The site is within drainage areas of tributaries to and of Flat Branch in the Catawba River Basin. The current land-use is residential, former agricultural/disturbed land and woodland. The riparian areas can be classified as Palustrine Broad Leaved, and Scrub Shrub (PF01A, PSS1A) in early to mid-succession. The U.S. Army Corps of Engineers (USACE) will confirm that the intermittent stream to perennial streams have important aquatic value. Characteristics include evidence of persistent pools; amphibians and macro- invertebrates; evidence of wildlife utilizing the stream; and rocky, gravelly, and sandy channel substrate. The hydric soil indicators included gleyed and low cbroma conditions, and concretions. The site includes Monacan and Iredell soils. These soils are map units, which may have inclusions of hydric soils according to the Natural Resource Conservation Service, Technical Guide- Section II-A-2, June 1991. Permitting Issues A permit is not required for work on the property restricted entirely to existing high ground. If the impacts require an application to the North Carolina Division of Water Quality (NCDWQ), stormwater treatment will be required as a condition of the permit for all commercial, institutional, industrial, and multi-family developments. High-density single family developments may also be required to provide stormwater treatment facilities - notably those over 30% impervious. If the entire project is over 30% you must address the entire project. If the entire project is less than 30% but there are significant areas of greater than 30% impervious then the NCDWQ may require that you address those areas. The sedimentation and erosion control plan should include strong protection of the wetland areas on this site to avoid violations of the general conditions of the Nationwide Permits. Summary Commonly Used Nationwide Permits and Conditions Nationwide Permit #39 (residential and commercial development) and Nationwide Permit #14 (road crossings) The maximum acreage limits of the Nationwide Permits (and their combination) is 1/2 acre. Most of the new and modified NWP's require notification to the United States Army Corps of Engineers (USACE) for activities that result in the loss of greater than 1/10 acre of waters of the United States. An application to the USACE is required for any stream or surface water impact using Nationwide Permit #39. The maximum impact to important streams is 300 linear feet. If impacts to streams are 1501f or more of important and/or unimportant streams, or 1/10th acre of wetlands, an application is required to the North Carolina Department of Environment and Natural Resources Division of Water Quality (NCDWQ) using Nationwide Permit #39. An application is required to the NCDWQ for any stream crossings utilizing Nationwide Permit #14, or for any combinations of typically used permits. Use of typical bottomless culverts may not avoid the regulatory process. Bridge like features however may be used to minimize impacts. Minimization measures such as plan modifications may be required to reduce the impacts. With an application to the NCDWQ, stormwater treatment facilities will be required by the NCDWQ as a condition of the permit for all projects, including residential projects, notably those over 30% impervious. Storm water detention may also be required. Mitigation is generally required with impacts to important streams and wetlands when an application is required. Stream mitigation can include relocation and/or restoring and approved degraded streams. This generally included meanders, substrate, banks, buffers, and combinations. Plans must be submitted for approval. If a permit is authorized - there is potential of participating in the state Wetland Restoration Program (WRP) for wetland and stream restoration to meet NCDWQ requirements and the USACE requirements. The fee is $24,500/acre times the ratio for wetlands and $125/lf for streams. If the WRP is not available, if will be necessary to implement stream mitigation. Stream buffers are typically required to protect the remaining streams on the property as part of the mitigation requirement. Permits must meet standard and general conditions, i.e. endangered species, historic properties, and other particular conditions. Comments area possible with and application from USFWS, SHPO (State Historic Preservation Office), North Carolina Wildlife Resource Commission, and other agencies. Impacts made in a first phase may impact permitting on future phases if or when the thresholds are exceeded. Therefore, and overall master plan including an evaluation of potential future permitting requirements should be conducted. The USACE and the NCDWQ will evaluate a project cumulatively. Typically, based on the Subdivision Rule in the regulations, the USACE will evaluate the subdivision as one project. Each individual lot would not be a separate project. If applicable, the NWP general conditions limit activities in designated critical resource waters and fills in waters of the United States within 100-year floodplains. All above-grade fills under most NWP's are prohibited within the FEMA mapped 100 year floodplain below the headwaters of any stream. Within the headwaters, above-grade fill is prohibited within the FEMA mapped regulatory floodway, and any above grade fill in the flood fringe must meet FEMA standards. On a case by case base the USACE may authorize Waters of the U.S. (i.e. streams) to be used for stormwater treatment facilities. However, perennial streams or existing wetlands cannot be used for stormwater treatment facilities. Individual Permits Individual Permits are required for all activities in Waters of the U.S. that do not qualify for a Nationwide Permit and are reviewed on a case by case basis by the USACE and other agencies, including NCDWQ, USFWS, NCWRC, and SHPO. As with NWP's a 401 Water Quality Certification from NCDWQ is a requirement. There is also a Public Notice. By a Memorandum of Agreement, the EPA and the USACE requires a strict mitigation sequence (no practicable alternative [avoidance], minimization, and compensatory mitigation be followed for all Individual Permits. It is generally understood that obtaining an Individual Permit may be difficult. Establishing that there are no practicable alternatives is the most important part and most difficult in the evaluation process. The USACE may ask for additional information regarding their comments. It is generally understood that Individual Permits have no processing periods. Individual Permit applications that are not withdrawn are eventually approved, however over 90% of the applications are modified (some substantially) in the process or include additional avoidance, minimization, and mitigation conditions. Recommendations A variety of planning and permitting options should also be studied to utilize the current Nationwide Permits effectively. Avoidance and minimization of impacts to streams can reduce the regulatory process significantly. This can be achieved by incorporating the streams and wetlands into the common open space and limiting stream impacts to stream crossings. It is strongly recommended that the Individual Permit process be avoided if possible, due to the complexity. However, individual permits have been issued for projects in which an acceptable analysis of alternatives and a significant mitigation plan has been proposed. However, it will be important to anticipate the potential for extensive analysis, the time frame, potential response to the public notice, and a less predictable outcome of the process. Please let me know if you have any questions or require fm*er explanation. Thanks. Leonard S. Rindner, PWS Environmental Planning Consultant Michael F. Easley Governor William G. Ross, Jr., Secretary Department of Environment and Natural Resources Kerr T. Stevens Division of Water Quality Draft Level Spreader Design Options Version 1.0 October 10, 2001 Using Level Spreaders to Provide Diffuse Flow Through Buffers for Compliance with Riparian Area Protection Rules Level spreaders are one means of providing diffuse flow through protected buffers. It is always preferable to not concentrate stormwater initially and provide as many outfalls as possible. This can reduce or even eliminate the need for engineered devices to provide diffuse flow. However, this is not feasible in many cases. Some buffer protection rules such as the Neuse, Catawba, and Tar-Pamlico Riparian Area Protection Rules do not allow direct discharges of stormwater through the protected buffers. However, it is "allowable" with written approval from the DWQ to provide best management practices (BMPs) that remove the nutrients or pollutants in question in order to discharge directly through the buffer. These measures could include the use of the buffer itself as a forested filter strip, for instance, to remove the desired substances. In addition to providing diffuse flow, level spreaders can be used to distribute flow into filter strips. There are certain criteria that apply to every design that utilizes level spreaders to provide diffuse flow: 1) The entire system must safely pass a 10 year storm event without failing or causing erosion, gullies or rills. 2) The design of the level spreader must take into consideration site specific conditions such as topography, vegetative cover, soil and other geologic conditions. If diffused flow is not attainable based on site conditions they should not be used. (i.e. the slope of the natural ground away from or parallel to the level spreader should be relatively smooth in the direction toward the stream so that the flow will not reconcentrate.) 3) Level spreaders should have a minimum length of ten feet and an absolute, maximum length of 300 feet. 4) It is always easier to keep flow distributed than to redistribute it after collection. 5) The type and amount of vegetative ground cover must also be considered. 6) Level spreaders must be level. Level Spreader Design Options: Conventional level spreader design option where entire discharge is passed through the level spreader with no bypass conveyance for larger storms: • For grass or thick ground cover vegetation: i)13 feet of level spreader for every 1 cis flow (Based on Q10 discharge) ii) maximum length of 300 feet per level spreader iii) Slopes of 8% or less from level spreader to top of stream bank • For forested areas with little or no ground cover vegetation: i) 100 feet of level spreader for every 1 cfs flow (Based on Q10 discharge) ii) maximum length of 300 feet per level spreader iii) slopes of 6% or less from level spreader to top of stream bank Another conventional level spreader design technique that can be used to accommodate steeper slopes where grading is allowed or exempt in zone 2 of protected buffers is to provide level spreaders in series as follows: • Can be used on slopes of up to 15% for forested areas and 25% for grass or thick ground cover • Structural level spreader just outside of zone 2 followed by a grassed berm level spreader just outside of zone 1 North Carolina Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address) 2321 Crabtree Blvd., Raleigh, NC 276042260 (Location) 919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr,state.nc.uslncwetiand§t Page 2 of 2 • Maximum Q10 discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover In some instances, because of topography, the size and imperviousness of the drainage area, or other site constraints, conventional level spreader designs are not appropriate. However, there are aftemative designs, like the ones listed below, that would allow a level spreader to function properly by bypassing the larger discharge events. This is based on the assumption used in designing most water quality BMPs that the "first flush" of stormwater discharge contains the most substances of concern. These other alternatives are "allowable (require written approval from DWQ)" for protected buffers in the Neuse, Tar-Pamlico and Catawba basins, but would not be allowable in protected buffers of the Randleman watershed. Level spreader with bypass for larger drainage areas that require 85% TSS removal or where lateral constraints limit the level spreader length severely: • Dry detention basin designed per NCDENR Stormwater BMP Manual* sized to detain 1" rain and release it over 2-5 days* through a level spreader. • Level spreader length based on the maximum release rate discharge • Discharges from greater than a 1" rain can be bypassed via an appropriate conveyance such as a grassed swale (rip rap lined ditch or pipe may be used if necessary) • Maximum discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover *( in order to meet 85% TSS Removal criteria) Another bypass alternative can be used that would not be considered to remove 85% TSS: • Detention basin such as a type B silt basin preceding the level spreader • Level spreader length based on the 1" per hour intensity storm • A system designed to bypass the greater than 1" in per hour intensity storm through an appropriate conveyance such as a grassed swale (rip rap lined ditch or pipe may be used if necessary) • Maximum discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover Yet another design that can be used in very specific areas with virtually flat slopes is a Preformed Scour Hole with a Level Spreader Apron (typical detail attached): • Discharge area must have virtually flat slopes such as those in flood plains or wetlands • Must be located outside of zone 2 • B = 3 x discharge pipe size for pipes of either 15 or 18 inches B= base width (see detail) • Maximum allowable discharge (Q10) of 6 cfs for a 15 inch pipe and 10 cis for an 18 inch pipe • Minimum apron width of 4 feet. Any of the above options will be considered acceptable if designed in accordance with the outlined criteria. Please keep in mind that some of the above practices may still require written approval, for instance when a direct bypass discharge is proposed through a protected buffer in the Neuse or Tar-Pamlico River Basin. w z J C er tr ? 3 mr ?, ? 'v Y .? Ah h '51-v Ll t-' G -0 Q f 4 0 P E if ? 0rJ ? ? V to L:.t L i` f 4 ?• w? M L') G1 0 Li LL cr L 43 Q: a? (r ti L C C7 •ti? M r U ry /?Y 4 N9 IL LEONARD S. RINDNER. PWS Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 July 8, 2002 Mr. David Cushing Pulte Home Corporation 11121 Carmel Commons Blvd. Charlotte, NC 28226 Re: Wetland Delineation Survey - Mattis Property Dear David: WETLANDS/ 401 GROUP APP ? 700.3 WATER QUALITY SECTION A wetland and stream determination and delineation was conducted at the proposed project site. An area is determined to be a wetland when it exhibits Hydric Soil, Hydrophytic Vegetation, and Wetland Hydrology characteristics. These characteristics are required to be in accordance with the definitions in the U.S. Army Corps Wetland Delineation Manual, 1987. Areas which exhibit these three characteristics, are identified as a wetland and permits may be required for development activities within these areas. Surface waters such as perennial and intermittent creeks are also subject to Section 404 of the Clean Water Act. Wetland Survey The delineation should now be surveyed. These areas are approximately indicated on the attached map, however this map should not be used as an accurate representation of wetland and stream extents. A survey would determine the actual extents more accurately and clarify the regulatory issues and potential mitigation conditions, if necessary. The attached map is for illustrative purposes only. A survey is required for the USACE to make a final jurisdictional determination on the property. The flags used to define the wetlands are yellow and blue tied together numbered sequentially as roughly depicted on the attached map. A slash (n next to the number indicates a connection. All notes on the flags should be recorded. The point numbers must appear on the survey in a clear and legible manner. Once the preliminary survey is conducted it will need to be reviewed by me to make sure that the connections are as intended. Additional site visits and coordination with the surveyor may be required if areas need to be extended to meet the property lines or for clarification. The centerline of all streams must be surveyed with approximate width identified. The map will need to be produced based on the following requirements. Areas that may need further evaluation may require a revision to the survey, if required. Metes and bounds tied to a property corner or other known point or listing of the northings and eastings (NC Coordinate Grid). 2. Location of each point identified to be included on the map. Property lines of the entire property or parcel. Mapped floodplains and contours should be included on the map, if possible. Mr. David Cushing Wetland Survey, Page 2 4. Wetland boundaries should be closed into distinct polygons. Acreage should be indicated for each polygon. It is helpful to have the polygons identified (i.e. Area "A", etc.). Surface waters such as perennial and intermittent channels should also be identified calculated in acreage and linear feet. The areas should then be listed in a table and totaled. 5. The map should have a vicinity map, north arrow, scale, project name property owner and/or developer including name, address, telephone number, size of tract. 6. The surveyor must seal the survey. 7. Longitude and Latitude at the approximate center of the site must be shown. 8. The following note needs to be shown on the map for the USACE to sign: Wetland Certification This certifies that this copy of this plat accurately depicts the boundary of jurisdiction of Section 404 of the Clean Water Act as determined by the undersigned on this date. Unless there is a change in the law of our published regulations this determination of Section 404 jurisdiction may be relied upon for a period not to exceed five (5) years from this date. This determination was made utilizing the 1987 Corps of Engineers Wetland Delineation Manual. Name: Title: Date: (signed by U. S. Army Corps of Engineers) At least four sealed copies should forwarded to me for submittal to the USACE for their certification. Please let me know if you have any questions or require further explanation. *onard S. Rindner, PWS Environmental Planning Consultant j fi tli } f j t .- -?? : ? +???..., ' ? jet ? /c ? x4 1 • n? s' I ? i^ t - r c 't r c;a a r c ? i 3G?b Y'' ? , I • ? Il? t; t? J 71- 1, I ?{ l li 1 # f j ht USGS QUAD-WEDDINGTON I, K , HABITAT ASSESSMENT AND RESTORATION PROGRAM INC.---w-- Biological Survey Mattis Property - Mecklenburg County South and West of Park Chester Dr. JAMES F. MATTHEW, Ph.D. T. LAWRENCE MELLICHAMP, Ph.D. P.O. Box 655 Newell, NC 28216 (704) 687-4061 (704) 687-4055 fax: (704) 687-3128 cell: (704) 577-6717 The site encompasses approximately 8 acres of Iredell soil. The site is an L-shaped piece with about 3 acres of flat woods and 5 acres of open lawn. A tributary of Flat Branch flows west to east between the two different pieces of property. The site was surveyed on July 5, 2002 for the possible presence of plant species or communities of concern. The NC Natural Heritage Program list of species and communities of concern for the Weddington USGS Quad was downloaded to provide the reference data. The database shows the following four plant species of concern: Aster georgianus Georgia aster Helianthus schweinitzii Schweintiz's sunflower Lotus helleri Carolina birdfoot-trefoil Solidago rigida ssp. glabrata Southern bold goldenrod The woods, field/woods ecotone and other borders were examined. The flat wood habitat has been used as a woodland pasture and there is little herbaceous cover present. The upland part of the woods is dominated by Willow oak (Quercus phellos) 16-18 in. diameter breast height, Red cedar (Juniperus virginiana) 14 in. dhb., and Winged elm (Ulmus alata) 9 in. dbh. One small section has been planted in Loblolly pine (Pinus taeda) 4-5 in. dbh. The flood plain, along the tributary on the south side of the woods has no Red cedar or Loblolly pine. The trees are larger here due to the increased moisture. There is a Red maple (Acer rubrum) 38 in. dbh., Willow oak 24 in. dbh., Southern shagbark hickory (Carya carolinae-septentrionalis) 24 in. dbh, Green ash (Fraxinus pennsylvanica) 22 in. dbh. Other smaller trees include Shumard's oak (Q. shumardii) 11 in. dbh., American elm (U. americana) 9 in. dbh., Sugarberry (Celtis laevigata) 9 in. dbh., and Sweetgum (Liquidambar styraciflua) 5 in. dbh. The larger five-acre site has been used as a home, now abandoned, and the lawn around the house has been mowed. The northern and western borders have a tree line, which was examined. The tree line is dominated by Sugarberry 14 in, dbh., Willow oak 13 in. dbh., Red cedar 7 in. dbh., Black walnut (Juglans nigra) 5 in. dbh., Black cherry (Prunus serotina) 4 in. dbh., and Box elder (Acer negundo) 3 in. dbh. Habitat Analysis, Endangered Plant Studies, Restoration of Habitats, Wetland Mitigation, Monitoring ONARD S. RIND Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 June 29, 2002 Ms. Renee Gledhill-Earley State Historic Preservation Office North Carolina Department of Cultural Resources 109 East Jones Street Raleigh, NC 27601-2807 Re: Mattis Property, 8 Acres, Charlotte, Mecklenburg County Dear Ms. Gledhill-Earley: On behalf of Pulte Homes Inc., I am forwarding information regarding the proposed project site for your review. The site is a single family residential site and former agricultural and woodland. The site is surrounded by densely developed single family and multi-family residential projects. The woodland areas are in early to middle succession with a few specimens. A utility line is under construction along the creek. Please contact me if you have any questions or need additional information. Thank you. Leonard S. Rindner, PWS Environmental Planning Consultant cc: Mr. David Cushing - Pulte Homes, Inc. SWE North Carolina Department of Cultural Resources State Historic Preservation Office David L. S. Brook, Administrator Michael F. Easley, Governor Lisbeth C. Evans, Secretary Jeffrey J. Crow, Deputy Secretary Office of Archives and History July 25, 2002 Leonard S Rindner Environmental Planning Consultant 3714 Spokeshave Lane Matthews NC 28105 Division of Historical Resources David J. Olson, Director Re: Pulte Homes, Mattis Property, eight acres, Mecklenburg County, ER 02-10295 Dear Mr. Rindner: Thank you for your letter of June 29, 2002, concerning the above project. We have conducted a review of the proposed undertaking and are aware of no historic resources which would be affected by the project. Therefore, we have no comment on the undertaking as proposed. The above comments are made pursuant to Section 106 of the National Historic Preservation Act and the Advisory Council on Historic Preservation's Regulations for Compliance with Section 106 codified at 36 CFR Part 800. Thank you for your cooperation and consideration. If you have questions concerning the above comment, contact Renee Gledhill-Earley, environmental review coordinator, at 919/733-4763. In all future communication concerning this project, please cite the above referenced tracking number. S' cerely, David Brook DB:kgc Location Mailing Address Administration 507 N. Blount St, Raleigh, NC 4617 Mail Service Center, Raleigh 276994617 Restoration 515 N. Blount St, Raleigh , NC 4613 Mail Service Center, Raleigh 27699-4613 Survey & Planning 515 N. Blount St, Raleigh, NC 4618 Mail Service Center, Raleigh 2 7699-46 1 8 Telephone/Fax (919) 733-4763 •733-8653 (919) 733-6547 •715-4801 (919)733-4763.715-4801 MEMORANDUM TO: John Dorney Regional Contact: Non-Discharge Branch WO Supervisor: Date: SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS Facility Name Threatt / Beaver Tract / Mattis Tract Project Number 03 0060 Recvd From APP Received Date 1/22/03 Recvd By Region Project Type Implementation of roads, infrastructure, and site County Mecklenburg County2 Region Mooresville Certificates Stream Stream Impacts (ft.) Permit Wetland Wetland Wetland Stream Class Acres Feet Type Type Impact Score Index Prim. Supp. Basin Req. Req. 39 -5TH O Y O N r- 11-138-3-2 -c 7-- 30,838. 0.47 F- 145.00 F_a ; ; O Y O N..' . F__F_' F_! F_r r Iwo Mitigation Wetland MitigationType Type Acres Feet F__ I Is Wetland Rating Sheet Attached? 0 Y0 N Did you request more info? 0 Y 0 N Have Project Changes/Conditions Been Discussed With Applicant? 0 Y 0 N Is Mitigation required? 0 Y O N Recommendation: 0 Issue 0 Issue/Coed 0 Deny Provided by Region: Latitude (ddmmss) Longitude (ddmmss) Comments: Staff visited the site on April 23rd. The origjnal plan (Threatt/Beaver) was approved in March 2003. Soon afterward a new tract (Mattis) became available. The Mattis tract was added as a modification to the original plan. The Threatt/Beaver tract is bordered by Flat Branch Creek to the east and an unnamed tributary to Flat Branch to the north. As you continue upstream on the tributary the trib dissects the Mattis tract. See map in application. Two stream crossing have been added: one provides access to both sides of the Mattis tract and the other was omitted in error from the original plan, In addition, both crossings allow the development to connect with existing _subdivisions bordering the site. The owner has agreed to a 15 ft, buffer along the portion of the tributary that cuts through the Mattis tract. The remaining segment of the tributary to Flat Branch will have a 25 ft. buffer. In addition, the site is subject to Mecklenburg County's SWIM Buffer. cc: Regional Office Central Office Page Number 1 Facility Name Threatt / Beaver Tract / Mattis Tract County Mecklenburg Project Number 03 0060 Regional Contact: Alan Johnson Date: 4/28/2003 Comments (continued from page 1): Th ere was confusion regarding the stormwater plan. The new tract became available and was added before a stormwater plan was developed for the original site plan. The stormwater site plan for the or iginal tract calls for the use of Level Spreaders (Design Version 1.0) that will ultimately "disch arge" into the buffer area along Flat Branch Creek. A different desiaamay be a required for the Mattis tract on the north side of the tributary. The applicant stated that the stormwater design is forthc oming per condition #2 of the original 401 approval dated 3/14/03. Approval recommended. cc: Regional Office Central Office Page Number 2 (no subject) Subject: (no subject) Date: Fri, 25 Apr 2003 16:37:15 -0400 From: Alan Johnson <Alan.Johnson@ncmail.net> Organization: NC DENR - Mooresville Regional Office To: cyndi.karoly@ncmail.net project 03-0060 Threatt bever mattis is recommend approval. A 15 ft buffer is to be place on the portion of the trib that cuts the new tract (mattis) and 25 ft on the remaining portion of the stream down to flat branch. Stormwater plan is forth coming. plan on using level spreaders. On the part of the tract on the opposite side of the trib, Lin Readner wasn't sure. coffee creek.: recommned approval. new ponds were built and were in the way. impacts appeared to be compliant with the certification. just need to get the i and t cross from rex. don't see prob with the basics. Alan Johnson - Alan.Johnson@ncmail.net %TITLE% North Carolina Dept. of Environment & Natural Resources Div. of Water Quality 919 N. Main St. Mooresville, NC 28115 Ph: (704) 663-1699 Fax: (704) 663-6040 Alan Johnson <Alan.Johnson@ncmail.net> %TITLE% NC DENR - Mooresville Div. of Water Quality I of 1 5/1/03 10:09 AM O?O? WA T'E?RpG 0 r p '< March 14, 2003 DWQ# 03-0060 Mecklenburg County Mr. Bill Gartland Crosland Land Company 141 Scaleybark Road Charlotte, NC, 28209 APPROVAL of 401 Water Quality Certification with Additional Conditions Dear Mr. Gartland: You have our approval, in accordance with the attached conditions, to place permanent fill in 0.47 acre of wetlands in order to construct a residential subdivision on the Threatt Beaver tract in Mecklenburg County, as described in your application received by the Division of Water Quality on January 22, 2003. After reviewing your application, we have determined that this fill is covered by General Water Quality Certification Number 3362, which can be viewed on our web site at http://h2o.enr.state.nc.us/ncwetlands. This Certification allows you to use Nationwide Permit Number 39 when it is issued by the U.S. Army Corps of Engineers. In addition, you should get any other federal, state or local permits before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Non-Discharge and Water Supply Watershed regulations. Also this approval will expire when the accompanying 404 permit expires unless otherwise specified in the General Certification. This approval is only valid for the purpose and design that you described in your application. If you change your project, you must notify us in writing and you may be required to send us a new application for a new certification. If the property is sold, the new owner must be given a copy of the Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h). For this approval to be valid, you must follow the conditions listed in the attached certification, as well as the additional condition listed below: 1. Deed notifications or similar mechanisms shall be placed on all lots with remaining jurisdictional wetlands and waters or areas within 50 feet of all streams and ponds on the property. These mechanisms shall be put in place within 30 days of the date of this letter or the issuance of the 404 Permit (whichever is later). A sample deed notification format can be downloaded from the 401/Wetlands Unit web site at http://h2o.enr.state.nc.us/ncwetlands ; 2. An additional condition is that a final, written stormwater management plan shall be approved in writing by this Office before the impacts specified in this Certification occur. The stormwater management plan must include plans and specifications for diffuse flow of all stormwater through existing buffers based on the Level Spreader Design Guidance at http://h2o.ehnr.state.nc.us/ncwetlands/level.pdf. These facilities must be designed to treat the runoff from the entire project, unless otherwise explicitly approved by the Division of Water Quality. Also, before any permanent building is occupied at the subject site, the facilities (as approved by this Office) shall be constructed and operational, and the stormwater management plan (as approved by this Office) shall be implemented. The structural stormwater practices as approved by this Office as well as drainage patterns must be maintained in perpetuity. No changes to the structural stormwater practices shall be made without written authorization from the Division of Water Quality; 3. You are required to return the attached Certification of Completion form to notify DWQ when all work included in the 401 Certification has been completed. If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 1508 of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone Mike Parker in our Mooresville Regional Office at 704-663-1699 or Cyndi Karoly in the Central Office in Raleigh 919-733-9721. A N. C. Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617V (919) 733-7015 Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of Water Quality . is Customer Service 1 800 623-7748 imap:Htodd. st.john%40dwq.denr. ncmail.net @ nplex l .ncmail.net:143/f... Subject: 030060 Threatt/Beaver Tract From: "Todd St. John" <todd.stJohn@ncmail.net> Date: Fri, 14 Mar 2003 10:07:44 -0500 To: cyndi karoly <cyndi.karoly@ncmail.net>, "michael.parker" <michael.parker@ncmail.net>, Samar Bou-Ghazale <Samar.Bou-Ghazale@ncmail.net>, "alan.johnson" <alanJohnson@ncmail.net> CC: "Todd St. John" <todd.stJohn@ncmail.net> i recommend issue w/ following special condition as agreed by applicant: An additional condition is that a final, written stormwater management plan shall be approved in writing by this office before the impacts specified in this Certification occur. The stormwater management plan must include plans and specifications for diffuse flow of all stormwater through existing buffers based on the Level Spreader Design Guidance at http://h2o.ehnr.state.nc.us/ncwetlands/level.pdf . These facilities must be designed to treat the runoff from the entire project, unless otherwise explicitly approved by the Division of Water Quality. Also, before any permanent building is occupied at the subject site, the facilities (as approved by this office) shall be constructed and operational, and the stormwater management plan (as approved by this Office) shall be implemented. The structural stormwater practices as approved by this Office as well as drainage patterns must be maintained in perpetuity. No changes to the structural stormwater practices shall be made without written authorization from the Division of Water Quality. Cyndi, i put the file in your box... 1 of 1 3/14/03 10:08 AM Re: MRO Tracking and Tardy Notice, 3/5/03 Subject: Re: MRO Tracking and Tardy Notice, 315103 Date: Wed, 05 Mar 2003 16:15:35 -0500 From: Cyndi Karoly <cyndi.karoly@ncmail.net> To: Rex Gleason <Rex.Gleason@ncmail.net> Rex - I just faxed a copy to your attention. There's also a copy of an e-mail I'd sent to Mike/Samar/Alan explaining a triage glitch. The file had mistakenly been stamped as issued, but the triagers meant it to go to MRO, so I'm not surprised the application never got there. It's a Len Rindner project, the impacts are below mitigation thresholds, and I don't think it'll be a big deal. It was sent along for avoidance review and stormwater recommendations. If you don't have time for anybody to get to it at this late date, we can just issue it from here with conditions. Just let me know your preference. Thanks. Rex Gleason wrote: > Cyndi, > A check of our records indicates that we never received a request for action > from Raleigh regarding the Threatt/Beaver Tract project (03-0060). If you > need comments from us, let us know and allow us time. > Thanks, > Rex > > Cyndi Karoly wrote: t ?3 > > Hi Mike, Samar, Alan > > Below is this week's 401 Tracking Notice for the Mooresville Regional > > Office. The Central office has not received your recommendations for > > these projects as of March 5, 2003. if you have not received any > > application, please let me know and I will fax it to you. Please take > > note of the date received in the Central Office and the 60-day clock > > projection. If we do not have your comments by two weeks before the > > clock expires, we may have to prepare the 401 without incorporating your > > comments, in order to avoid waiving the 401. Two weeks from today, the > > application will be forwarded to the appropriate Central Office staff > > member (Todd St. John ) if we do not have Regional Office comments by > > then. The CO staff will then consult you if time allows and make a > > recommendation on the 401 to John Dorney. > > TRACKING: > > 401 Applications: > > DWQ No. Project County Permit Type Received Expires > > 03-0130 Vulcan Materials, Cabarrus Quarry, Cabarrus Co., NW 39144, > > 215103 416103 > > 03-0125 David A. Sinclair pond, Alexander Co., 1VW39 215103 416103 > > 03-0109 Dairy Branch/Sedgefield Park Branch Project, Mecklenburg Co., > > 1VW27 213103 414103 > > Please use the staff recommendation sheet in Filemaker Pro, and then > > notify me that the report has been filed. My e-mail address is > > Cyndi.Karoly@ncmail.net or you can call me at 919-733-9721. > > There are two tardy projects for MRO this week. These files have been > > passed along to Todd St. John. You'll probably be hearing from him > > soon. > > Thanks very much for your attention. 1 of 2 3/5/03 4:16 PM Re: MRO Tracking and Tardy Notice, 3/5/03 > > ------------------------------------------------------------------------ > > Name: Tardy Projects. doc > > Tardy Projects.doc Type: Winword File (application/msword) > > Encoding: base64 > > Download Status: Not downloaded with message > Rex Gleason - Rex.Gleason@ncmail.net > %TITLE9 > North Carolina Dept. of Environment & Natural Resources > Div. of Water Quality > 919 N. Main St. > Mooresville, NC 28115 > Ph: (704) 663-1699 Fax: (704) 663-6040 2 of 2 3/5/03 4:16 PM \o?OV r ` rRpG O ? William G. Ross .1r., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality Division of Water Quality Department of Environmental and Natural Resources Wetlands/401 Unit Street Address: 2321 Crabtree Boulevard, Suite 250 Raleigh, NC 27604-2260 Mailing Address: 1650 Mail Service Center Raleigh, NC 27699-1650 Contact Information: Phone #: 919-733-1786 Fax #: 919-733-6893 V' l eoid Fax Fax To: Company: Date: Number of pages including cover sheet: Notes or special instructions: N. C. Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address) 2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location) (919) 733-1786 (phone), 919-733-6893 (fax), (http:/lh2o,enr.state.nc.us/ncwetlands Threatt/Beaver Tract, 03-0060, Mecklenburg County Subject: Threatt/Beaver Tract, 03-0060, Mecklenburg County Date: Fri, 07 Feb 2003 11:14:55 -0500 From: Cyndi Karoly <cyndi.karoly@ncmail.net> To: "Samar.Bou-Ghazale" <Samar.Bou-Ghazale@ncmail.net>, "Michael.Parker" <Michael.Parker@ncmail.net>, "Alan.Johnson" <Alan.Johnson@ncmail.net>, "cyndi.karoly" <cyndi.karoly@ncmail.net> Guys, this project was triaged last week, and you should have received it in the mail by now. This file was stamped 11401 issued" but the 401 has NOT been issued. It was mistakenly placed in the issued pile, then got the stamp, then was passed along to Bev. She noticed that the triagers had actually intended it to go the the MRO. Anyway, we've set the file in the To RO drawer. The triagers had meant to send it along to request: review of avoidance/minimization, especially the wetlands in the floodplain look for stormwater treatment opportunities onsite This is a Len Rindner project, so the application should be pretty good. We have until March 22 to get a response to the applicant, so hopefully this delay from the triage glitch won't be a problem. If you haven't gotten this file, please let me know and I'll fax you one. Thanks as always for your patience and tolerance of our snafus. ec?5? K LA 1 of 1 2/7/03 11:15 AN Threatt/Beaver Tract Mecklenburg County, North Carolina Joint Application Form and Supporting Documentation for NATIONWIDE PERMITS THAT REQUIRE NOTIFICATION TO CORPS OF ENGINEERS NATIONWIDE PERMITS THAT REQUIRE SECTION 401 CERTIFICATION CONCURRENCE Prepared for: Mr. Bill Gartland Crosland Land Company 141 Scaleybark Road Charlotte, N.C. 28209 Prepared By: Leonard S. Rindner, PWS Environmental Planning Consultant 3714 Spokeshave Lane Matthews, NC 28105 1-(704) 846-0461 Office Use Only: Form Version May 2002 USACE Action ID No. DWQ No. (If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".) 1. Processing J 1. Check all of the approval(s) requested for this project: ® Section 404 Permit ? Riparian or Watershed Buffer Rules ? Section 10 Permit ? Isolated Wetland Permit from DWQ Z 401 Water Quality Certification 2. Nationwide, Regional or General Permit Number(s) Requested: 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ? 4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for mitigation of impacts (verify availability with NCWRP prior to submittal of PCN), complete section VIII and check here: ? 5. If your project is located in any of North Carolina's twenty coastal counties (listed on page 4), and the project is within a North Carolina Division of Coastal Management Area of Environmental Concern (see the top of page 2 for further details), check here: ? H. Applicant Information 1. Owner/Applicant Information Name: Mailing Address: ?s Telephone Number: 2? (ol 221 Fax Number: 0 X27 ?/ ?' E-mail Address: 2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory a thority for the owner/applicant.) Name: ?CE q and (- irr?o t0.r? nJ - Company Affiliation: 62 ?onr 4" "!!:-.( 614' ' 64 Leh f' Mailing Address: 37l-f Cv?- Telephone Number: 70 `t Fax Number: '70`i° 7 O bC E-mail Address: Dn-4,.f 1I III. Project Information 3 4 Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project: 2. T.I.P. Project Number or State Project Number (NCDOT Only): Property Identification Number (Tax PIN): 5. Site coordinates, if available (UTM or Lat/Long): (Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) 6. Property size (acres): --YD AGY-C c 7. Nearest body of water (stream/river/sound/ocean/lake):/Ct 8. River Basin: (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http://h2o.enr.state.nc.us/admin/maps/.) 9. Describe the existing conditions on the si a and general land a in the Vii ity of the project at the time of this plication: Dorm ! of I I Location`/ / #? County: ??-/?i1Ar Nearest Town: COQ (o Subdivision name (include p se/lot number): 10. Describe the overall project in detail, including the type of equipmgnt to be 11. IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with V. Future Project Plans Are any future permit requests anticipated for this project? If so, describe the anticipated work, and nrovide iustification for the exclusion of this work from the current application. VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. The applicant must also provide justification for these impacts in Section VII below. All proposed impacts, permanent and temporary, must be listed herein, and must be clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. 1. Provide a written description of the proposed impacts: ,< ? a 2. Individually list wetland impacts below: Wetland Impact Site Number indicate on ma Type of Impact* Area of Impact acres Located within 100-year Floodplain** es/no Distance to Nearest Stream (linear feet Type of Wetland*** " List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. •* 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or online at hqp://www.feni&go . List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond, Carolina Bay, bog, etc.) Indicate if wetland is isolated (determination of isolation to be made by USACE only). List the total acreage (estimated) of all existing wetlands on the property: + Total area of wetland impact proposed: ± `f-7 Ar-r-z< 3. Individually list all intermittent and perennial stream impacts below: Stream Impact Site Number (indicate on ma) Type of Impact* Length of Impact (linear feet) Stream Name** Average Width of Stream Before Im ct Perennial or Intermittent? lease specify) " List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap, dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain), stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the nearest downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at www.usgs.eov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.topozone.com, www.manauest.com, etc.). Cumulative impacts (linear distance in feet) to all streams on site: / 45'-e ?tr'? ± ZSO4 t?' CJ? ?S ?u G??'?'1 Qr1 - S I,L D-. 4 of 17 4. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U. S.) below: Open Water Impact Site Number indicate on ma Type of Impact* Area of Impact acres Name Wate) (? applicable) Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc. * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: fill, excavation, dredging, flooding, drainage, bulkheads, etc. 5. Pond Creation if construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ? uplands ? stream ? wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniq? es to be followe during constructiop to reduce impacts. / J ?p i I rn n 1l, ? _l e /ir?„?: _7 l'.-r? //, ?_ . ' Af/- I ,¢?'f_Tli?ri ek D? V`t TI 4i_, aAe'k-C. A,_4- 'K ?Si? -4'r I IQ? VIII. Mitigation ?.. C v ?/.vim v?o[Gc.?c'? `?'? mac. U'?:?(k f 0 DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required y the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. Donn 0 of V) 0 USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on March 9, 2000, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://h2o.enr.state.nc.us/ncwetlands/stnngide.html. Provide a brief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not limited to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a description of the current site conditions and proposed method of construction. Please attach a s Ae- eparate sheet i -more space is nee(tecl. 4V U wr li ft.th f??- 71?c sib, ?s /fa s ?l?,?C?? S r? v 1-F- 2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration Program (NCWRP). Please note it is the applicant's responsibility to contact the NCWRP at (919) 733-5208 to determine availability and to request written approval of mitigation prior to submittal of a PCN. For additional information regarding the application process for the NCWRP, check the NCWRP website at http://h2o.enr.state.nc.us/wrp/index.htm. If use of the NCWRP is proposed, please check the appropriate box on page three and provide the following information: Amount of stream mitigation requested (linear feet): Amount of buffer mitigation requested (square feet): Amount of Riparian wetland mitigation requested (acres): Amount of Non-riparian wetland mitigation requested (acres): Amount of Coastal wetland mitigation requested (acres): ??SI S ,r U SALF 13- In nF 7 I IX. X. Environmental Documentation (required by DWQ) Does the project involve an expenditure of public (federal/state) funds or the use of public (federal/state) land? Yes ? No L?r If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ? No ? If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ? No ? Proposed Impacts on Riparian and Watershed Buffers (required by DWQ) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. Yes ? No ? If you answered "yes", provide the following information: Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify )? Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact (square feet Multiplier Required Miti gation 3 2 1.5 Total ' Zone 1 extends out 30 feet perpendicular from near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. D- 1 1 of 1 '1 If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 2B .0242 or.0260. XI. Stormwater (required by DWQ) Describe impervious acreage (both existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands 4ownstream fro the ropes. Ps odd 4-• Joan, oi(- NUPL/- . LAJ II ?""``(( Ur ?' C G 1 ?-GO ?v? r?jr- ?? 1 o??e ?G+ S I o? 1 . ?C -T ?j 01 XH. Sewage Disposal (( equired by DWQ) ' _ sJ-- ?s Z,g o ?„? iy?avf o?lly? 3 C Grlc?r . G vv ?? Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of was ewito ? enera d fr pt?t the wroposed/ ry e t or available capacity of the subject facility. ?Q?? ?-, i?? s XIII. Violations (required by DWQ) Is this site in violation of DWRVetland Rules (15A NCAC 2H.0500) or any Buffer Rules? Yes ? No Ff li cation? Is this an after-the-fact perep, Yes El No XIV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). 2-,-- 110e.3 Applicant/Agent's Signature Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) D-11of/7 LEONARD S. RINDNER, PW S Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 January 19, 2003 Mr. Steve Chapin US Army Corps of Engineers - Reg. Field Office 151 Patton Avenue - Room 208 Asheville, NC 28801 - 5006 Mr. John R. Dorney Division of Water Quality - NCDENR 2321 Crabtree Boulevard, Suite 250 Raleigh, NC 27604 Mr. Mike Parker NCDENR - Division of Water Quality 919 North Main Street Mooresville, NC 28115 Re: Threatt Beaver Tract - Approximately 40 acres, Mecklenburg County, North Carolina - Nationwide Permit #39 Dear Sirs On behalf of my client, Mr. Bill Gartland of Crosland Land Company, I am requesting authorization to utilize Nationwide Permit #39 to impact + 0.47 acres of wetlands to develop the proposed single family community. There are no proposed impacts to the 2500 linear feet of stream on the project site. As depicted on the plan the remaining wetlands and streams will be protected within common open space. To mitigate for the proposed wetland impacts areas of the floodplain including wetlands are proposed to be enhanced. Stormwater will be filtered over the large buffer areas utilizing level spreading devices. There are no direct discharges of stormwater to any creek. The following sections present the results of the environmental planning and a description of the impacts with proposed minimization and mitigation measures. SUMMARY OF WATERS OF THE U.S Methodology Preliminary identification and delineation of the Jurisdictional Waters on the site were determined according to the Corps of Engineers Wetland Delineation Manual, Technical Report Y-87-1, 1987, with Appendices. Preliminary data gathering included review and interpretation of topographic maps; USDA Soil Conservation Survey; aerial photographs, and preliminary site visits to selected areas. Then the Routine On-Site Determination Method was utilized to determine the upper boundary of the wetlands. In order to make a positive wetland determination indicators of hydrophytic vegetation, hydric soil, and wetland hydrology must be identified as described in the manual. January 19, 2002, Page 3 ThreattBeaver Tract Background The site is within the headwaters of perennial tributaries of Flat Branch and Flat Branch of the Catawba Basin (Water Classification - Q. The majority of the site is flat to slightly sloping. The current land-use is undeveloped woodland areas and existing single family residential property. There are several drainage channels and drainage patterns on the site that were constructed to facilitate drainage. Description Wetland Hydrology and H3 ddc Soils These riparian areas can be classified as Palustrine Forested Broad Leaved and Scrub Shrub (PF01A, PF01C, PSS1A). According to the North Carolina Resource Conservation Service, Technical Guide- Section H-A-2, June 1991, Monacan (Mo) soils and Iredell (IrA) soils are listed as Map Units with inclusions of Hydric Soils in Mecklenburg County. The streams on the site are intermittent and perennial. Characteristics include persistent pools, small riffle and pool complexes (a "special aquatic site") in the perennial streams, and rocky, gravelly, and sandy channel substrate. Vegetation in riparian and along tributaries is dominated by Facultative Wet Vegetation. Jurisdictional Waters of the U.S. and North Carolina 1) Flat Branch (+ 13001f) ± 0.50 acres 2) Perennial Streams (+ 1,200 If) ± 0.16 acres 3) Wetlands ± 1.50 acres Total ± 2.16 acres Proposed impacts to Jurisdictional Waters of the U.S. and North Carolina 1) Flat Branch (+ 13001f) ± 0.00 acres 2) Perennial Streams (+ 1,200 lf) ± 0.00 acres 3) Wetlands + 0.47 acres Total + 0.47 acres PROPOSED MINIMIZA TION AND MITIGATION The following Best Management Practices will be employed and strictly enforced to minimize impacts to Jurisdictional Waters. These will include: a) Siltation Barriers; Sediment Traps and Diversion Ditches b) Barricades to define construction limits to sensitive sites and to protect trees c) Methods to prevent short term impacts will be inspected regularly and maintained during construction of the project. d) Project construction will strictly adhere to an approved Sedimentation and Erosion Control Plan. Best Management Practices will include utilizing siltation trapping ponds and other erosion control structures where appropriate. Impacts from hazardous materials and other toxins to fish and aquatic life such as fuels will be avoided by not permitting staging areas to be located near January 19, 2002, Page 4 Threatt/Beaver Tract surface waters. e) As required by the 401 Water Quality Cerlification conditions, measures will be taken to prevent "live" or fresh concrete from coming into contact with waters until the concrete has hardened. MITIGATION PLAN Stormwater and Wetland Enhance Plan The purpose of the mitigation plan is to enhance the development of wetlands in various forms, which are saturated within the root zone or inundated for a significant portion of the growing season in the floodplain of Flat Branch. The restored and/or created wetlands will provide water storage, bank stabilization, pollutant removal, and aquatic resource values as described in the Fourth Version - Guidance for Rating Values of Wetlands in North Carolina. The expected saturation and inundation will lead to the development of Bottomland Hardwood:;, Scrub/Shrub, Emergent, and Aquatic wetland zones. It is expected that the wetlands created and or enhanced will meet or exceed the wetland areas filled by the development of this project in the non-wetland floxiplain as the result of the proposed measures and will be conducted on approximately a 2:1 basis. Stormwater runoff, overland flow, flooding, captured rainfall, and a seasonal high water table will support the hydrology of these potential wetland areas. To allow a saturated soil development, Coir fiber (coconut) logs will be used to help impound water and can W installed by hand. They will be lived staked to create a more natural hummock. The density of the log ;an be modified, thereby holding or allowing varying amounts of water to be impounded. These microtopographic features will create the various hydrological zones. Habitat Enhancement Wetland zones adjacent to surface waters improve water quality by filtering runoff, trapping sediment, absorbing nutrients, and provide wildlife habitat and a food source for aquatic organisms, amphibians, birds and other wildlife. Currently the vegetation of the floodplain is dominated by exotic and introduced non-native species such as Chinese Privet, Nepalese Cordgrass, Russian Olive, Japanese Rose, and Japanese Honeysuckle. The creation and restoration of wetland habitats will gradually cause the existing non-native vegetation to transition to native Obligate (OBL) and Facultative Wet (FACW) vegetation such as Black Willow, Silky Dogwood, Green Ash, Oak species, Soft Rush, Jewelweed, Duck Potato, and Tear- Thumb. Other vegetation which may volunteer include a diversity of saturation tolerant tree species which are also high in wildlife value include buttonbush, arrowood, elderberry, and spicebush. STORMWA TER MANAGEMENT PLAN The impervious percentage for development is approximately 28%. The developed portion of the site is approximately 38%. Based on a preliminary review of the site with Todd St. John of NCDWQ, the develop is proposing to utilize a Level Spreader Design to filter runoff from the development in the large undeveloped and flat floodplain. The design will be based on guidance provided in Draft Level Spreader Design Options - Version 1.0. with Preformed Scour Holes as recommended by Todd St. John. The guidance is an attachment to this report. January 19, 2002, Page 5 ThreattBeaver Tract PROTECTION FROM FUTURE DEVELOPMENT Remaining streams and wetlands will be protected in common open space. As required, deed notifications or similar mechanisms will be placed on all lots with remaining jurisdictional wetlands and waters or areas within 50 feet of al streams and ponds on the property. COMPLIANCE WITH WETLAND REGULATIONS In accordance with Title 15 NCAC 2H.0500, the following DEED NOTIFICATION shall be recorded in the County Registry prior to the conveyance of lots. Said Deed Notification shall apply to (name of subdivision), lot numbers in County, North Carolina as shown on plans titled (subdivision name) prepared by ( name of designer) dated date: "A portion of this lot has been determined to meet the requirements for designation as a regulatory wetland. Any subsequent fill or alteration of this wetland shall conform to the requirements of the state wetland rules adopted by the State of North Carolina in force at the time of the proposed alteration. The intent of this provision is to prevent additional wetland fill, so the property owner should not assume that a future application for fill would be approved. The property owner shall report the name of the subdivision in any application pertaining to said wetland rules. This covenant is intended to ensure continued compliance with wetland rules adopted by the State of North Carolina and, therefore, benefits may be enforced by the State of North Carolina. This covenant is to run with the land and shall be binding on all Parties and all persons claiming under them." (Signature) Owner's name Address City, state, zip Phone Number: (_) STATE OF NORTH CAROLINA COUNTY I, , a Notary Public of the State of North Carolina, County, hereby certify that owner personally appeared before me this day and executed by above certification. Witness my hand and notarial seal, this day of , 2003 (Notary public) My commission expires January 19, 2002, Page 6 Threatt/Beaver Tract THREATENED AND ENDANGERED SPECIES Federally listed plant and animal species with endangered or threatened status are protected under the Endangered Species Act of 1973. The US Fish and Wildlife Service has identified Schweinitz's sunflower and the Carolina heelsplitter. Schweinitz's sunflower thrives in full sun characteristic of succession fields, margins, and forested openings. Based on a site reconnaissance, habitat conducive to support the Schweinitz's sunflower does not appear to be present in the project area. The Carolina heelsplitter is a freshwater mussel, which prefers shaded areas either, in a ponded portion of a small stream or in runs along steep banks with moderate current. Primary habitat is waters less than three feet deep with a soft mud, muddy sand, or shady gravelly substrate. It is normally restricted to protected silted areas or under banks especially associated with obstructions such as stumps or fallen trees. The current distribution according to the U.S. Fish and Wildlife Service is limited to portions of two streams -- Goose Creek and Waxhaw Creek -- and a small river originating from rural areas in Union County. Therefore it is not expected to occur on this site. CULTURAL RESOURCES The project site is disturbed from previous agricultural activities. No structures were found on the site. The State Historic Preservation Office may review of the USGS maps at the Office of State Archaeology and the Survey and Planning Office of the North Carolina Department of Cultural Resources to determine if sites are indicated on the National Historic Register within the study area. AQUATIC HABITAT The aquatic systems in the project area consist of wetlands and streams in the Catawba Basin. A variety of wildlife is supported by these systems including mammals, birds, reptiles, amphibians, fish, insects, mollusks, and crustaceans. Therefore strict adherence to an approved erosion and sedimentation control plan will be maintained during the construction period in order to control degradation of water quality downstream and protect the areas to be preserved. Best Management Practices will include utilizing siltation trapping ponds and other erosion control structures where appropriate. Impacts from hazardous materials and other toxins to fish and aquatic life such as fuels will be avoided by not permitting staging areas to be located near surface waters. Also, as required by the 401 Water Quality Certification conditions, measures will be taken to prevent "live" or fresh concrete from coming into contact with waters until the concrete has hardened. Aquatic resources are expected to be enhanced through the restoration of wetland areas that flood and pond for longer durations. CONCLUSION Based on the value of the jurisdictional waters and wetlands on this site, the developer through sensitive site planning has chosen to balance the site's economic viability with its environmental value and permitability. The goal of the Site Plan and Mitigation Plan is to help balance the environmental consequences of this development by protecting waters downstream of the project and to preserve and enhance important wetland and stream habitats on the site. IWALS 010 ?- -j T ' li a as en z _ \ 0 ?I -I 0> I?0 I p 14 0 'J . 39NIul QO°-' Vn3? G15°°°"" -I+' / a /+ 14 q I ?ro1 ,rTn i v nmi ? ' '-'It ?Q _ _ I I z_ Nb?a h• ;?' • • `..... 44%, ul N H.7 I I H • ? I Q ? J j ? I °o J LL I z m J LL © N b III Q 3,is•?c W Q I W 2 W I $---( z F? 1 ® II I: a W z N J z z w W CL Q J o 0 o , Z a ti W cn a CL N I- LU f v _ RIP I I O 1 C1 o c o M CL _ -, N I "f ft odood? ?m1' I % i I Q 4 D ? a- L= - --I - /w I W t W - w I 3 I ?r?r I i I I I I I ( I I I I I y J I I I I I 1 -- Q ----i a i I J I I #Aarwwo t GNAffT= LWffM VWW S •o ? I I z \ ? III i ??? \ \ ?I I? Sk'??q I gn I \ PM1By??1 I ??? I \ \ I I \ I I I I I I I 1G $?? ?y?44P BASE MAP COURTESY OF APPROXIMATE MAP - WATERS OF THE U.S. MECK. CO. OIS FOR SURVEY AND STUDY PURPOSES ONLY SUBJECT TO U.S.A.C.E. VERIFICATION AI 1 a 1,. WOZ, G opyngb? ;ZpOb hlti , 1b Got". `Ino ?Y? r' 1m i w; ?, t k? -A T rr L f ? j1F77% ? a ? , ••. V ?,` M 1t r '??.'i 4'?`• Hof ? ?? ?? tl ?'?''?? ,/' - ??? - -15 y ?. it f ?'r + S jl USGS QUAD-WEDDINGTON AI EXTENTS SUBJECT TO DELINEATION FOR STUDY PURPOSES ONLY SUBJECT TO U.S.A.C.E. VERIFICATION FLOODPLAINS AND BUFFERS lip /?/? ?4 4 >r? w. W r ? ' LEONARD S. RINDNER, PW S Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning (704) 846-0461 Date: December 22, 2002 MEMORANDUM To: Bill Gartland From: Len Rindner Re; Stormwater Management Requirements for Threatt/Beaver Site. NC Based on my experience 1 recommended a preliminary review with the NCDWQ to determine the extent of stormwater management facilities that would be required, if an application to impact streams or wetlands was required to the NCDWQ. We also reviewed the current NCDWQ stormwater management policy regarding high-density single family developments. According to NCDWQ, high density single family single family residential developments over 30% impervious are required to provide stormwater treatment facilities. If the entire project is over 30% you must address the entire project. If the entire project is less than 30% but there are significant areas of greater than 30% impervious then the NCDWQ may require that you address those areas. My recommendation was based on my understanding of the substantial risk to the developer in not considering this case by case issue prior to significant financial investment and detailed planning and engineering design. The current application threshold is only 1/10th acre of jurisdictional or isolated wetlands and/or 150 linear feet of channel for this site. Based on a discussion with Mr. Todd St. John of NCDWQ, if an application is required on this site it is highly likely that a stormwater management will be required if the permit (401 Water Quality Certification) is authorized. Although more complex facilities can be required, it was suggested that level spreaders for this project would likely be an acceptable option. To potentially change the condition of a 401 Water Quality Certification an adjudicatory hearing is required, which requires a petition, which conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings. Let me know if you have any questions. We should meet to go over the issues in more detail. Leonard S. Rindner, PWS Environmental Planning Consultant VWV? Michael F. Easley TT" Governor ?. William G. Ross, Jr., Secretary > ' .? Department of Environment and Natural Resources 0 Kerr T. Stevens Division of Water Quality Draft Level Spreader Design Options Version 1.0 October 10, 2001 Using Level Spreaders to Provide Diffuse Flow Through Buffers for Compliance with Riparian Area Protection Rules Level spreaders are one means of providing diffuse flow through protected buffers. It is always preferable to not concentrate stormwater initially and provide as many outfalls as possible. This can reduce or even eliminate the need for engineered devices to provide diffuse flow. However, this is not feasible in many cases. Some buffer protection rules such as the Neuse, Catawba, and Tar-Pamlico Riparian Area Protection Rules do not allow direct discharges of stormwater through the protected buffers. However, it is "allowable" with written approval from the DWQ to provide best management practices (BMPs) that remove the nutrients or pollutants in question in order to discharge directly through the buffer. These measures could include the use of the buffer itself as a forested filter strip, for instance, to remove the desired substances. In addition to providing diffuse flow, level spreaders can be used to distribute flow into filter strips. There are certain criteria that apply to every design that utilizes level spreaders to provide diffuse flow: 1) The entire system must safely pass a 10 year storm event without failing or causing erosion, gullies or rills. 2) The design of the level spreader must take into consideration site specific conditions such as topography, vegetative cover, soil and other geologic conditions. If diffused flow is not attainable based on site conditions they should not be used. (i.e. the slope of the natural ground away from or parallel to the level spreader should be relatively smooth in the direction toward the stream so that the flow will not reconcentrate.) 3) Level spreaders should have a minimum length of ten feet and an absolute, maximum length of 300 feet. 4) It is always easier to keep flow distributed than to redistribute it after collection. 5) The type and amount of vegetative ground cover must also be considered. 6) Level spreaders must be level. Level Spreader Design Options: Conventional level spreader design option where entire discharge is passed through the level spreader with no bypass conveyance for larger storms: • For grass or thick ground cover vegetation: i)13 feet of level spreader for every 1 cfs flow (Based on Q10 discharge) ii) maximum length of 300 feet per level spreader iii) Slopes of 8% or less from level spreader to top of stream bank • For forested areas with little or no ground cover vegetation: i) 100 feet of level spreader for every 1 cis flow (Based on Q10 discharge) ii) maximum length of 300 feet per level spreader iii) slopes of 6% or less from level spreader to top of stream bank Another conventional level spreader design technique that can be used to accommodate steeper slopes where grading is allowed or exempt in zone 2 of protected buffers is to provide level spreaders in series as follows: • Can be used on slopes of up to 15% for forested areas and 25% for grass or thick ground cover • Structural level spreader just outside of zone 2 followed by a grassed berm level spreader just outside of zone 1 North Carolina Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address) 2321 Crabtree Blvd., Raleigh, NC 276042260 (Location) 919-733-1786 (phone), 919-733-6893 (fax), htto://h2o.enr.state.nc.us/ncwetlands/ Page 2 of 2 • Maximum Q10 discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover In some instances, because of topography, the size and imperviousness of the drainage area, or other site constraints, conventional level spreader designs are not appropriate. However, there are alternative designs, like the ones listed below, that would allow a level spreader to function properly by bypassing the larger discharge events. This is based on the assumption used in designing most water quality BMPs that the "first flush" of stormwater discharge contains the most substances of concern. These other alternatives are "allowable (require written approval from DWQ)" for protected buffers in the Neuse, Tar-Pamlico and Catawba basins, but would not be allowable in protected buffers of the Randleman watershed. Level spreader with bypass for larger drainage areas that require 85% TSS removal or where lateral constraints limit the level spreader length severely: • Dry detention basin designed per NCDENR Stormwater BMP Manual* sized to detain 1" rain and release it over 2-5 days* through a level spreader. • Level spreader length based on the maximum release rate discharge • Discharges from greater than a 1" rain can be bypassed via an appropriate conveyance such as a grassed swale (rip rap lined ditch or pipe may be used if necessary) • Maximum discharge of 1 cis per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover *( in order to meet 85% TSS Removal criteria) Another bypass alternative can be used that would not be considered to remove 85% TSS: • Detention basin such as a type B silt basin preceding the level spreader • Level spreader length based on the 1" per hour intensity storm • A system designed to bypass the greater than 1" in per hour intensity storm through an appropriate conveyance such as a grassed swale (rip rap lined ditch or pipe may be used if necessary) • Maximum discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover Yet another design that can be used in very specific areas with virtually flat slopes is a Preformed Scour Hole with a Level Spreader Apron (typical detail attached): • Discharge area must have virtually flat slopes such as those in flood plains or wetlands • Must be located outside of zone 2 • B = 3 x discharge pipe size for pipes of either 15 or 18 inches B= base width (see detail) • Maximum allowable discharge (Q10) of 6 cfs for a 15 inch pipe and 10 cis for an 18 inch pipe • Minimum apron width of 4 feet. Any of the above options will be considered acceptable if designed in accordance with the outlined criteria. Please keep in mind that some of the above practices may still require written approval, for instance when a direct bypass discharge is proposed through a protected buffer in the Neuse or Tar-Pamlico River Basin. 3c L41 z J z r biz 1} a Tj Q +_. I r Q „I KR, a LLJ tt33?a G1' L s.., V) _ L 414- C I 1. 'Y' .?. r... G V r TIL LEONARD S. RINDNER. PWS Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 December 23, 2002 Mr. Bill Gartland Crosland Land Company 135 Scaleybark Road Charlotte, NC 28209 Dear Bill: A wetland and stream determination and delineation was conducted at the proposed project site. An area is determined to be a wetland when it exhibits Hydric Soil, Hydrophytic Vegetation, and Wetland Hydrology characteristics. These characteristics are required to be in accordance with the definitions in the U.S. Army Corps Wetland Delineation Manual, 1987. Areas, which exhibit these three characteristics, are identified as a wetland and permits may be required for development activities within these areas. Surface waters such as perennial and intermittent creeks are also subject to Section 404 of the Clean Water Act. Isolated wetlands are regulated by the North Carolina Department of Environment and Natural Resources. Wetland Survey The delineation should now be surveyed. These areas are approximately indicated on the attached map, however this map should not be used as an accurate representation of wetland and stream extents. A survey would determine the actual extents more accurately and clarify the regulatory issues and potential mitigation conditions, if necessary. The attached map is for illustrative purposes only. A survey is required for the USACE to make a final jurisdictional determination on the property. The flags used to define the wetlands are blue numbered sequentially as roughly depicted on the attached map. A slash (n next to the number indicates a connection. All notes on the flags should be recorded. The point numbers must appear on the survey in a clear and legible manner. The centerline of all streams must be surveyed with approximate width of the stream identified. Once the preliminary survey is conducted it will need to be reviewed by me to make sure that the connections are as intended. Additional site visits and coordination with the surveyor may be required if areas need to be extended to meet the property lines or for clarification. The map will need to be produced based on the following requirements. Areas that may need further evaluation may require a revision to the survey, if required. Metes and bounds tied to a property corner or other known point or listing of the northings and eastings (NC Coordinate Grid). 2. Location of each point identified to be included on the map. 3. Property lines of the entire property or parcel. Mapped floodplains and contours should be included on the map, if possible. Mr. Bill Gartland Wetland Survey, Page 2 4. Wetland boundaries should be closed into distinct polygons. Acreage should be indicated for each polygon. It is helpful to have the polygons identified (i.e. Area "A", etc.). Surface waters such as perennial and intermittent channels should also be identified calculated in acreage and linear feet. The areas should then be listed in a table and totaled. 5. The map should have a vicinity map, north arrow, scale, project name property owner and/or developer including name, address, telephone number, size of tract. 6. The surveyor must seal the survey. 7. Longitude and Latitude at the approximate center of the site must be shown. 8. The following note needs to be shown on the map for the USACE to sign: Wetland Certification This certifies that this copy of this plat accurately depicts the boundary of jurisdiction of Section 404 of the Clean Water Act as determined by the undersigned on this date. Unless there is a change in the law of our published regulations this determination of Section 404 jurisdiction may be relied upon for a period not to exceed five (5) years from this date. This determination was made utilizing the 1987 Corps of Engineers Wetland Delineation Manual. Name: (signed by U. S. Army Corps of Engineers) Title: Date: At least four sealed copies should forwarded to me for submittal to the USACE for their certification. Please let me know if you have any questions or require further explanation. Thanks. S. Rindner, PWS nental Planning Consultant LEONARD S. RINDNER. PW S Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 December 9, 2002 Mr. Bill Gartland Crosland Land Company 135 Scaleybark Road Charlotte, NC 28202 Re: Preliminarv Wetland/Stream Evaluation - Threatt-Vail Site, Mecklenburg County, NC Dear Bill: The proposed project site was visited at your request, to identify the presence of wetlands and surface waters that would require permitting if they were impacted by development. An area is determined to be a wetland when it exhibits Hydric Soil, Hydrophythic Vegetation, and Wetland Hydrology characteristics. These characteristics are required to be in accordance with the definitions in the U.S. Army Corps Wetland Delineation Manual, 1987. Areas that exhibit these three characteristics are identified as a wetland and permits are required for development activities within these areas. Surface waters such as perennial and intermittent creeks, and certain ponds are also subject to Section 404 and Section 401 of the Clean Water Act. The approximate extent of the Waters of the U.S. are depicted on the map are based on an analysis of site characteristics, topographic and soil maps, and an on-site review. Stream and Wetland Hydrology, Hydric Soil, Hydrophytic Vegetation The site is within drainage areas of tributaries to and of Flat Branch in the Catawba River Basin. The current land-use is residential, former agricultural/disturbed land and woodland. The riparian areas can be classified as Palustrine Broad Leaved, and Scrub Shrub (PFOIA, PSS1A) in early to mid-succession. The U.S. Army Corps of Engineers (USACE) will confirm that the intermittent stream to perennial streams have important aquatic value. Characteristics include evidence of persistent pools; amphibians and macro- invertebrates; evidence of wildlife utilizing the stream; and rocky, gravelly, and sandy channel substrate. The hydric soil indicators included gleyed and low chroma conditions, and concretions. The site includes Monacan and Iredell soils. These soils are map units, which may have inclusions of hydric soils according to the Natural Resource Conservation Service, Technical Guide- Section II-A-2, June 1991. Permitting Issues A permit is not required for work on the property restricted entirely to existing high ground. If the impacts require an application to the North Carolina Division of Water Quality (NCDWQ), stormwater treatment will be required as a condition of the permit for all commercial, institutional, industrial, and multi-family developments. High-density single family developments may also be required to provide stormwater treatment facilities - notably those over 30% impervious. If the entire project is over 30% you must address the entire project. ff the entire project is less than 30% but there are significant areas of greater than 30% impervious then the NCDWQ may require that you address those areas. The sedimentation and erosion control plan should include strong protection of the wetland areas on this site to avoid violations of the general conditions of the Nationwide Permits. Summary Commonly Used Nationwide Permits and Conditions Nationwide Permit #39 (residential and commercial development) and Nationwide Permit #14 (road crossings The maximum acreage limits of the Nationwide Permits (and their combination) is 1/2 acre. Most of the new and modified NWT's require notification to the United States Army Corps of Engineers (USACE) for activities that result in the loss of greater than 1/10 acre of waters of the United States. An application to the USACE is required for any stream or surface water impact using Nationwide Permit 439. The maximum impact to important streams is 300 linear feet. If impacts to streams are 150 if or more of important and/or unimportant streams, or 1/10th acre of wetlands, an application is required to the North Carolina Department of Environment and Natural Resources Division of Water Quality (NCDWQ) using Nationwide Permit #39. An application is required to the NCDWQ for any stream crossings utilizing Nationwide Permit #14, or for any combinations of typically used permits. Use of typical bottomless culverts may not avoid the regulatory process. Bridge like features however may be used to minimize impacts. Minimization measures such as plan modifications may be required to reduce the impacts. With an application to the NCDWQ, stormwater treatment facilities will be required by the NCDWQ as a condition of the permit for all projects, including residential projects, notably those over 30% impervious. Storm water detention may also be required. Mitigation is generally required with impacts to important streams and wetlands when an application is required. Stream mitigation can include relocation and/or restoring and approved degraded streams. This generally included meanders, substrate, banks, buffers, and combinations. Plans must be submitted for approval. If a permit is authorized - there is potential of participating in the state Wetland Restoration Program (WRP) for wetland and stream restoration to meet NCDWQ requirements and the USACE requirements. The fee is $24,500/acre times the ratio for wetlands and $125/lf for streams. If the WRP is not available, if will be necessary to implement stream mitigation. Stream buffers are typically required to protect the remaining streams on the property as part of the mitigation requirement. Permits must meet standard and general conditions, i.e. endangered species, historic properties, and other particular conditions. Comments area possible with and application from USFWS, SHPO (State Historic Preservation Office), North Carolina Wildlife Resource Commission, and other agencies. Impacts made in a first phase may impact permitting on future phases if or when the thresholds are exceeded. Therefore, and overall master plan including an evaluation of potential future permitting requirements should be conducted. The USACE and the NCDWQ will evaluate a project cumulatively. Typically, based on the Subdivision Rule in the regulations, the USACE will evaluate the subdivision as one project. Each individual lot would not be a separate project. If applicable, the NWP general conditions limit activities in designated critical resource waters and fills in waters of the United States within 100-year floodplains. All above-grade fills under most NWP's are prohibited within the FEMA mapped 100-year floodplain below the headwaters of any stream. Within the headwaters, above-grade fill is prohibited within the FEMA mapped regulatory floodway, and any above grade fill in the flood fringe must meet FEMA standards. On a case by case base the USACE may authorize Waters of the U.S. (i.e. streams) to be used for stormwater treatment facilities. However, perennial streams or existing wetlands cannot be used for stormwater treatment facilities. Individual Permits Individual Permits are required for all activities in Waters of the U.S. that do not qualify for a Nationwide Permit and are reviewed on a case by case basis by the USACE and other agencies, including NCDWQ, USFWS, NCWRC, and SHPO. As with NWP's a 401 Water Quality Certification from NCDWQ is a requirement. There is also a Public Notice. By a Memorandum of Agreement, the EPA and the USACE requires a strict mitigation sequence (no practicable alternative [avoidance], minimization, and compensatory mitigation be followed for all Individual Permits. It is generally understood that obtaining an Individual Permit may be difficult. Establishing that there are no practicable alternatives is the most important part and most difficult in the evaluation process. The USACE may ask for additional information regarding their comments. It is generally understood that Individual Permits have no processing periods. Individual Permit applications that are not withdrawn are eventually approved, however over 90% of the applications are modified (some substantially) in the process or include additional avoidance, minimization, and mitigation conditions. Recommendations A variety of planning and permitting options should also be studied to utilize the current Nationwide Permits effectively. Avoidance and minimization of impacts to streams can reduce the regulatory process significantly. This can be achieved by incorporating the streams and wetlands into the common open space and limiting stream impacts to stream crossings. It is strongly recommended that the Individual Permit process be avoided if possible, due to the complexity. However, individual permits have been issued for projects in which an acceptable analysis of alternatives and a significant mitigation plan has been proposed. However, it will be important to anticipate the potential for extensive analysis, the time frame, potential response to the public notice, and a less predictable outcome of the process. Please let me know if you have any questions or require father explanation. Thanks. reonard S. Rindner, PWS Environmental Planning Consultant LEONARD S. RINDNE& PW S Environmental Planning Consultant 3714 Spokeshave Lane Professional Wetland Scientist Matthews, NC 28105 Land Planning Tele: (704) 846-0461 Fax (704) 847-0185 FAX COVER LETTER Send To Fax Number : To: dof S?. u"^ e ew From :C,0*0,. ? Referen Date : 17000,11 #/OX Remarks/Message: I -44n Z- ", Copy: From : No '\ y r f % ff? 1 ! f 1 ? s~ ? ` 1 P" off I ? \';? ? low N., s a :a a? : s s s •?.y '' ? ? l `? Y ! 1. { 1 ? ! , it r ?. 1 i.. ! t { IMMO a 7 O?OF W ATERPG > A `r Michael F. Easley Governor William G. Ross, Jr., Secretary Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality July 29, 2003 Mr. Brent Niemann, PE ESP Associates, PA PO Box 7030 Charlotte, NC 28241 Subject: Dear Mr. Niemann: Threatt/Beaver Tract DWQ Project No. 030060 Mecklenburg County The Wetlands Unit staff reviewed the stormwater management plans received July 18, 2003 for the subject project and determined that additional information is necessary to complete the technical review process. The required additional information is as follows: Level Spreader Design Guidance Condition No. 2 of the 401 Water Quality Certification issued May 15, 2003 requires that diffuse flow of stormwater be provided through the buffers according to the Level Spreader Design Guidance at htti)://h2o.ehnr.state.nc.us/ncwetlands/level.pdf (also attached). The submitted design does not meet those criteria: Preformed scour holes cannot be used at the outlets of properly designed stormwater discharge pipes that are greater than 18 inches. The minimum level spreader length will not be met. The maximum level spreader length is 300 feet. As such, it may be necessary to separate the discharges. The design of the level spreader (as opposed to the preformed scour holes) is not clear. It is recommended that you review the bypass design options. 2. Operation and Maintenance Agreement An operation and maintenance agreement is required. An example operation and maintenance plan can be found at http://h2o.ohnr.state.nc.us/ncwetlands/mitresto.html. The operation and maintenance agreement must also be signed by the responsible party and notarized. If you have any questions or would like to discuss this project, please contact me at (919) 733-9584. Also, plea: that the NC DENR Stormwater Best Management Practices Manual as well as other documents and informatioi downloaded from the Wetlands Unit web site at http://h2o.ehnr.state.nc.us/ncwetlands/mitresto.htmi. Sincerely, jk Todd St. John, E Environmental Engineer cc: Mooresville Regional Office File North Carolina Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NO 27699-1650 (Mailing Address) 2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location) 919-733-1786 (phone). 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/ Michael F. Easley Governor William G. Ross, Jr., Secretary Department of Environment and Natural Resources Kerr T. Stevens Division of Water Quality Draft Level Spreader Design Options Version 1.0 October 10, 2001 Using Level Spreaders to Provide Diffuse Flow Through Buffers for Compliance with Riparian Area Protection Rules Level spreaders are one means of providing diffuse flow through protected buffers. It is always preferable to not concentrate stormwater initially and provide as many outfalls as possible. This can reduce or even eliminate the need for engineered devices to provide diffuse flow. However, this is not feasible in many cases. Some buffer protection rules such as the Neuse, Catawba, and Tar-Pamlico Riparian Area Protection Rules do not allow direct discharges of stormwater through the protected buffers. However, it is allowable" with written approval from the DWQ to provide best management practices (BMPs) that remove the nutrients or pollutants in question in order to discharge directly through the buffer. These measures could include the use of the buffer itself as a forested filter strip, for instance, to remove the desired substances. In addition to providing diffuse flow, level spreaders can be used to distribute flow into filter strips. There are certain criteria that apply to every design that utilizes level spreaders to provide diffuse flow: 1) The entire system must safely pass a 10 year storm event without failing or causing erosion, gullies or rills. 2) The design of the level spreader must take into consideration site specific conditions such as topography, vegetative cover, soil and other geologic conditions. If diffused flow is not attainable based on site conditions they should not be used. (i.e. the slope of the natural ground away from or parallel to the level spreader should be relatively smooth in the direction toward the stream so that the flow will not reconcentrate.) 3) Level spreaders should have a minimum length of ten feet and an absolute, maximum length of 300 feet. 4) It is always easier to keep flow distributed than to redistribute it after collection. 5) The type and amount of vegetative ground cover must also be considered. 6) Level spreaders must be level. Level Spreader Design Options: Conventional level spreader design option where entire discharge is passed through the level spreader with no bypass conveyance for larger storms: • For grass or thick ground cover vegetation: i) 13 feet of level spreader for every 1 cfs flow (Based on Q10 discharge) ii) maximum length of 300 feet per level spreader iii) Slopes of 8% or less from level spreader to top of stream bank For forested areas with little or no ground cover vegetation: i) 100 feet of level spreader for every 1 cfs flow (Based on Q10 discharge) ii) maximum length of 300 feet per level spreader iii) slopes of 6% or less from level spreader to top of stream bank Another conventional level spreader design technique that can be used to accommodate steeper slopes where grading is allowed or exempt in zone 2 of protected buffers is to provide level spreaders in series as follows: Can be used on slopes of up to 15% for forested areas and 25% for grass or thick ground cover Structural level spreader just outside of zone 2 followed by a grassed berm level spreader just outside of zone 1 North Carolina Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address) 2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location) 919-733-1786 (phone), 919-733-6893 (fax), htto://h2o.enr.state.nc.us/ncwetlandg/ Page 2 of 2 Maximum Q10 discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover In some instances, because of topography, the size and imperviousness of the drainage area, or other site constraints, conventional level spreader designs are not appropriate. However, there are alternative designs, like the ones listed below, that would allow a level spreader to function properly by bypassing the larger discharge events. This is based on the assumption used in designing most water quality BMPs that the "first flush" of stormwater discharge contains the most substances of concern. These other alternatives are "allowable (require written approval from DWQ)" for protected buffers in the Neuse, Tar-Pamlico and Catawba basins, but would not be allowable in protected buffers of the Randleman watershed. Level spreader with bypass for larger drainage areas that require 85% TSS removal or where lateral constraints limit the level spreader length severely: • Dry detention basin designed per NCDENR Stormwater BMP Manual* sized to detain 1" rain and release it over 2-5 days* through a level spreader. • Level spreader length based on the maximum release rate discharge • Discharges from greater than a 1" rain can be bypassed via an appropriate conveyance such as a grassed swale (rip rap lined ditch or pipe may be used if necessary) • Maximum discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover *( in order to meet 85% TSS Removal criteria) Another bypass alternative can be used that would not be considered to remove 85% TSS: • Detention basin such as a type B silt basin preceding the level spreader • Level spreader length based on the 1" per hour intensity storm • A system designed to bypass the greater than 1" in per hour intensity storm through an appropriate conveyance such as a grassed swale (rip rap lined ditch or pipe may be used if necessary) • Maximum discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover Yet another design that can be used in very specific areas with virtually flat slopes is a Preformed Scour Hole with a Level Spreader Apron (typical detail attached): • Discharge area must have virtually flat slopes such as those in flood plains or wetlands • Must be located outside of zone 2 • B = 3 x discharge pipe size for pipes of either 15 or 18 inches B= base width (see detail) • Maximum allowable discharge (Q10) of 6 cfs for a 15 inch pipe and 10 cfs for an 18 inch pipe • Minimum apron width of 4 feet. Any of the above options will be considered acceptable if designed in accordance with the outlined criteria. Please keep in mind that some of the above practices may still require written approval, for instance when a direct bypass discharge is proposed through a protected buffer in the Neuse or Tar-Pamlico River Basin. I 5 a? 0 a ?,..j 1 CL I 0 4 I© ?a 5_ r -n? a ?JQ _s? ESP ASSOCIATES, P.A. P.O. Box 7030 CHARLOTTE, NORTH CAROLINA 28241 (704) 583-4949 TO %?GD?1J F, - A V JL! iqrOF &-A7e:4 C1?U?tLI `?I &F7- M,4IL 4,6z-Ace c-OT&x- 1MVIff IRn OCR IffnRA MO TURAI DA IF 067 lei O JOB NQ t AI-IFNI ION ^ ?D I KAt4o RH: 77' mk-m --ov8 ,16o I &,1 i TE9 a L)Aw WE ARE SENDING YOU Attached 7 Under separate cover via th%towing items: > lJJ 17 Shop drawings f7 Prints CI Plans ? Samples _ _ ? Spe cik lw Ic C1 Copy of letter 11 Change order L! ,ICI/ A COPIES DATE NO. DESCRIPTION Com [.? cr of S hh 12,4 /1 z LEpi:-? Orpec 114W ?cro l? cof4ftCleD Leyz ?r77c>e.? Al PkAjfJ&f4? CvP o ???? ? ? aF amt THESE ARE TRANSMITTED as checked below: X For approval L7 For your use LI As requested I- I Approved as submitted 1-_1 Approved as noted 1-1 Returned for corrections L1 For review and comment i 1 C I FORBIDS DUE REMARKS 1 Resubmit copies for approval I Submit copies for distribution 1 Return corrected prints 1 1 PRINTS RETURNED AFTER LOAN TO US # y7 -'Cxx? _ 0. 5, P1T1? - Gc'r.?D1TIs???Z 2 ---- M&?Ac?r- P?f? AMZA/hc- -/"3 04th 7a f o car __ ?r?ucno,.s . - _C0fk__ -/"IE IF yay Ate _y auyE ?TlorJc, o4 fq'vu2c A"472onl4c COPY TO SIGNED: If enclosures are not as noted, kindly not l' us at once. DWQ Project No. 03 - O74PO DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET 1. PROJECT INFORM TION (pl ase complete the following information): Project Name : ??? Mfg "? Di X't"n1 Contact Person: Phone Number: - Level Spreader ID: _ Level Spreader Length g ft. Drainage Area 3• S% ac. Impervious Area , l ac. Maximum Filter Strip/Buffer Slope G /,D % grass (Exr?r. FuxPPu4aJ) (perpendicular to flow) (on-sit and off-site drainage to the (on-site and off-site drainage to the level sp dfl (6% for forested, leaf littler cover, 8% for th' round core ??(( ) R l06' , I Max. Discharge from a 10 Year Storm 3 cfs (r-vw1 F65 9? 23 , f ?_55 IF Max. Discharge to Level Spreader Q Cfs v L?? Filter Strip/Buffer Vegetation EX" W D15fURgiV (thick ground cover or grass, canopied forest with leaf lifot lOw h?Dff groundcover) Pre-treatment or Bypass Method REQUIRED ITEMS CHECKLIST Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for additional information and will substantially delay final review and approval of the project. Applicants Initials Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 100 ft per cfs in canopied forest with leaf litter. Pre-Form Scour Holes are on flat slopes only b No structures are located in protected buffers* If bypass method specified in the Draft Level Spreader Design Option Document: Bypass method is specified (if applicable) and plan details and calculations are provided Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass discharge. No structures are located in protected buffers. Plan details for the bypass and outlets are provided. The operation and maintenance agreement includes annual erosion and vegetation repair. The operation and maintenance agreement signed and notarized by the responsible party is provided. * Level spreaders in series can be used on slopes of up to 15% in forested areas with leaf littler cover or on slopes of up to 25% in areas with thick ground cover or grass if designed according to the Draft Level Spreader Design Option Document. This potentially requires a minor variance in protected buffer areas. In any event the second level spreader cannot be located in Zone 1 of a protected buffer area. i?T?ov Avn?Tx {- D?hN 4F-e"t, 7o Tip Dls?=+? ?oot?(rT ,,? ,7w4rl" Dw-f-CA07CO I (-7G" r^<? S U.S. ARI / CORPS OF ENGINEERS WILMINGTONT DISTRICT Action Id. 200330403 County MeekIe*n /401 GR0VF GENERAL PERMIT (REGIONAL AND NATIONT)VIDE)1'ERIFI*I6§ 1,100 Property owner: Crosland Land, Attn: Mr. Bill Gartland - ? 0UNT . 141 Scaleybark Road _ Charlotte, NC 25209 APR 1 i 2003 Telephone No.: s Size and Location of project (water body, road name/number, town, etc.): Threatt/Beaver/Mattis Tract located on approx. 48 acre site between Rea Road and Tom Short Road with access by Threatt Vail Road; in south Charlotte Description of Activity: Impact < 150 LF of unnamed tributaries to Flat Branch for road crossings and 0.47 acre of wetlands in association with the construction of a residential subdivision. Approximately 2,350 LF of stream channels on the property will be avoided by the development. Mitigation to offset the loss of wetlands will be accomplished throug creation of approx. 1.0 acre of wetlands adjacent to Flat Branch and through preservation of remaining streams and wetlands within common even space. The miti-atior FPflus 1"? done accordance wftlr submitted plans. This project was previously authorized on March 7, 2003. Since that time the project plans were modified and a new authorization is hereby issued to replace the previous authorization. SPECIAL CONDITION: A REPORT SUMMARIZING THE SUCCESS OF THE MITIGATION MUST BE SGJT M V i" ITFU tT ONT iFri RJR. vF THE DATE OF !I!' urrv AU i HORIZ A l IONT. Applicable Law: X Section 404 (Clean Water Act, 33 U.S.C.1344). (check all that apply) Section 10 (River and Harbor Act of 1899). Authorization: Regional General Permit Number. 39 Nationwide Permit Number. Your work is authorized by this Regional General (RGP) or Nationwide Permit (NWP) provided it is accomplished in strict accordance with the attached conditions and your submitted plans. If your activity is subject to Section 404 (if Section 404 block above is checked), before beginning work, you must also receive a. Section 401 water quality certification from the N.C. Division of Water Quality, telephone (919) 733-1786. For any activity within the twentt, coastal counties, before beginning work you must contact the N. C. Division of Coastal Management, telephone (919)733 21 93. Please read and carefully comply- with the attached conditions of the RGP or NTV'P. rmv violation of the conditions of the RGP or the NWP referenced above may subject the permittee to a stop work order, a DEPARTMENT OF THE ARAIY WILMINGTON DISTRICT, CORPS OF ENGINEERS 251 PATTON AVENUE ROOM 208 ASHEVILLE, NORTH CAROLINA 28801-5006 REPLY TO ATTENTION OF Permit Number: 200330403 Permit Type: NW39 Name of County: Mecklenburg Name of Permittee: Crosland Land Date of Issuance: April 10, 2003 Upon completion of the activity authorized by this permit and any mitigation required by the permit, sign this certification and return it to the following address: U.S. Army Corps of Engineers Attention: CESAW-RG-A 151 Patton Avenue, Room 208 Asheville, North Carolina 28801-5006 'lease note that your permitted activity is subject to a compliance inspection by an U.S. Army Corps of r;ng-veers representative. If you fail to comply wit:2 permit trou are subject to permit suspension, modification, or revo_cion. I hereby certify that the work authorized by the above referenced permit has been completed in accordance with the terms and conditions of the sa__ permit, and required mitigation was completed in accordance with the permit conditions. Signature of Permittee Date NATIONWIDE PERMIT 39 DEPARTMENT OF THE ARMY CORPS OF ENGINEERS FINAL NOTICE OF ISSUANCE AND MODIFICATION OF NATIONWIDE PERMITS FEDERAL REGISTER AUTHORIZED MARCH 18, 2002 Residential, Commercial, and Institutional Developments. Discharges of dredged or fill material into non-tidal waters of the United States, excluding non-tidal wetlands adjacent to tidal waters, for the construction or expansion of residential, commercial, and institutional building foundations and building pads and attendant features that are necessary for the use and maintenance of the structures. Attendant features may include, but are not limited to, roads, parking lots, garages, yards, utility lines, stormwater management facilities, and recreation facilities such as playgrounds, playing fields, and golf courses (provided the golf course is an integral part of the residential development). The construction of new ski areas or oil and gas wells is not authorized by this nationwide permit. Residential developments include multiple and single unit developments. Examples of commercial developments include retail stores, industrial facilities, restaurants, business parks, and shopping centers. Examples of institutional developments include schools, fire stations, government office buildings, judicial buildings, public works buildings, libraries, hospitals, and places of worship. The activities listed above are authorized, provided the activities meet all of the following criteria: A. Tiie discharge does no cause the lose cc areaze:- titan 2\ acre o non-tidal water: of the United States, exciuding non-tidal wetlands adjacent to tidal waters; E. The discharge does not cause the loss of greater than 300 linear feet of a stream bed, unless for intermittent stream beds this criterion is waived in writing pursuant to a determination by the District Engineer, as specified below, that the project complies with all terms and conditions of this nationwide permit and that any adverse impacts of the project on the aquatic environment are minimal. both individually and cumulatively; C. The permittee must notify the District Engineer in accordance with General Condition 131, if any of the following criteria are met: 1. The discharge causes the loss of greater than \1/10\ acre of non-tidal waters of the United States, excluding non-tidal wetlands adjacent to tidal waters; or 2. The discharge causes the loss of any open waters, including perennial or intermittent streams, below the ordinary high water mark (see Note, below), or 3. The discharge causes the loss of greater than 300 linear feet of intermittent stream bed. In such case, to be authorized the District Engineer must determine that the activity complies with the other terms and conditions of the nationwide permit, determine adverse environmental effects are minimal both individually and cumulatively, and waive the limitation or, stream impacts in writing before the permittee may proceed: D. For discharges in special aquatic sites, including wetlands, the notification must include a delineation of affected special aquatic sites; E. The discharge is part of a single and complete project; F. The permittee must avoid and minimize discharges into waters of the United States at the project site to the maximum extent practicable. The notification, when required, must include a written statement explaining how avoidance and minimization of losses of waters of the United States were achieved on the project site. Compensatory mitigation will normally be required to offset the losses of waters of the United States. (See General Condition 19.) The notification must also include a compensatory mitigation proposal for offsetting unavoidable losses of waters of the United States. If an applicant asserts that the adverse effects of the project are minimal without mitigation, then the applicant may submit justification explaining why compensatory mitigation should not be required for the District Engineer's consideration; G. When this nationwide permit is used in conjunction with any other nationwide permit, any combined total permanent loss of waters of the United States exceeding \1/10\ acre requires-that the permittee notify the District Engineer in accordance with General Condition 13; .H. Any work authorized by this nationwide permit must not cause more than minimal degradation of water quality or more than minimal changes to the flow characteristics of any stream (see General Conditions 9 and 21), L For discharges causing the loss of \l/10\ acre or less ofwaters of the United States, the permittee must submit a report, within 30 days of completion of the work, to the, District Engineer that contains the following information: (1) The name, address, and telephone number of the permittee; (2) The location of the work; (3) A description of the work; (4) The type and acreage of the loss of waters of the United States (e.g., \1/2\ acre of emergent wetlands); and (5) The type and acreage of any compensatory mitigation used to offset the loss of waters of the United States (e.g., \1/2\ acre of emergent wetlands created on-site); J. If there are any open waters or streams within the project area, the permittee will establish and maintain, to the maximum extent practicable, wetland or upland vegetated buffers next to those open waters or streams consistent with General Condition 19. Deed restrictions, conservation easements, protective covenants, or other means of land conservation and preservation are required to protect and maintain the vegetated buffers established on the project site. Only residential, commercial, and institutional activities with structures on the foundation(s) or building pad(s), as well as the attendant features, are authorized by this nationwide permit. The compensatory mitigation proposal required in paragraph (f) of this nationwide permit may be either conceptual or detailed. The wetland or upland vegetated buffer required in paragraph 0) of this nationwide permit will determined on a case-by-case basis by the District Engineer for addressing water quality concerns. The required wetland or upland vegetated buffer is part of the overall compensatory mitigation requirement for this nationwide permit. If the project site was previously used for agricultural purposes and the farm owner/operator used Nationwide Permit 40 to authorize activities in waters of the United States to increase production or construct farm buildings, Nationwide Permit 39 cannot be used by the developer to authorize additional activities in waters of the United States on the project site in excess ofthe acreage limit for Nationwide Permit 39 (i.e., the combined acreage loss authorized under Nationwide Permits 39 and 40 cannot exceed \1/2\ acre). Subdivisions: For residential subdivisions, the aggregate total loss of waters of Unites States authorized by Nationwide Permit 39 cannot exceed\1/2\ acre. This includes any loss of waters associated with development of individual subdivision lots. (Sections 10 and 404) Note: Areas where wetland vegetation is not present should be determined by the presence or absence of an ordinary high water mark or bed and bank. Areas that are waters of the United States based-on this criterion would require a Pre-Construction Notification (PCN) although water is infrequently present in the stream channel (except for ephemeral waters, which do not require PCNs under paragraph (c)(s), above: however, activities that result in the loss of greater than\1/10\ acre of ephemeral waters would require PCNs under paragraph (c)(1), above) are determined by the presence or absence of an ordinary high water mark or bed and bank. Areas that-are waters of the United States based on this criteria would require a PCN even though water is infrequently present in the stream channel (except for ephemeral waters). NATIONWIDE PERWET GENERAL CONDITIONS The following Teneral Conditions must be followed in order fo:- any authorization ny a NV7P to be valid: 1. Navigation. No activity may cause more than a minimal adverse effect on navigation. 2. Proper Maintenance. Any structure or fill authorized shall be properly maintained, including maintenance to ensure public safety. 3. Soil Erosion and Sediment Controls. Appropriate soil erosion and sediment controls must be used and maintained in effective operating condition during construction, and all exposed soil and other fills, as well as any work below the ordinary high water marl. or high tide line, must be permanently stabilized at the earliest practicable date. Permittees are encouraged to perform work within waters of the United States during periods of low-flow or no-flow. 4. Aquatic Life Movements. No activity may substantially disrupt the necessary life-cycle movements of those species of aquatic life indigenous to the waterbody, including those species that normally migrate through the area, unless the activity's primary purpose is to impound water. Culverts placed in streams must be installed to maintain low flow conditions. 5. Equipment. Hea«7 equipment working iii wetlands must be placed on mats, or other measures must be taken to minimize soil disturbance. 6. Regional and Case-By-Case Conditions. The activity must comply with any regional conditions that may have been added by the Division Engineer (see 33 CFR 330.4(e)) and with any case specific conditions added by the Corps or by the state or tribe hl its Section 401 Water Quality Certification and Coastal Zone Management Act consistency determination. 7. Wild and Scenic Rivers. No activity may occur in a component of the National Wild and Scenic River System; or in a river officially designated by Congress as a'study river" for possible inclusion in the system, while the river is in an official study status; unless the appropriate Federal agency, with direct management responsibility for such river, has determined in writing that the proposed activity will not adversely affect the Wild and Scenic River designation, or study status. Information on Wild and Scenic Rivers may be obtained from the appropriate Federal land management agency in the area (e.g., National Park Service, U.S. Forest Service, Bureau of Land Management, U.S. Fish and Wildlife Service). 8. Tribal Rights. No activity or its operation may impair reserved tribal rights, including, but not limited to, reserved water rights and treaty fishing and hunting rights. 9. Water Quality. a. In certain states and tribal lands an individual 401 Water Quality Certification must be obtained or waived (See 33 CFR 330.4(c)). b. For NWPs 12, 14, 17, 18, 32, 39, 40. 42, 43, and 44, where the state or tribal 401 certification (either generically or individually) does not require or approve water qualit37 management measures, the pemzittee must provide water quality management measures that wil_ ensure that the authorized work does not result in more. Man minima: degradation of water quality (or the Corps determines that compliance with state or local standards, where applicable, will ensure no more than minimal adverse effect on water quality). An important component of water quality management includes stormwater management that minimizes degradation of the downstream aquatic system, including water quality (refer to General Condition 21 for stormwater management requirements). Another important component of water quality management is the establishment and maintenance of vegetated buffers next to open waters, including streams (refer to General Condition 19 for vegetated buffer requirements for the T\TWPs). This condition is only applicable to projects that have the potential to affect water quality. While appropriate measures must be taken, in most cases it is not necessary to conduct detailed studies to identify such measures or to require monitoring. 1.0. Coastal Zone Management. In certain states, an individual state coastal zone management consistency concurrence must be obtained or waived (see 33 CFR 330.4(d)). 11. Endangered Species a. No activity is authorized under any NWP which is likely to j eopardize the continued existence of a threatened or endangered species or a species proposed for such designation, as identified under the Federal Endangered Species Act (ESA), or which will destroy or adversely modify the critical habitat of such species. Non-federal permittees shall notify the District Engineer if any listed species or designated critical habitat might be affected or is in the vicinity of the project: or is located in the designated critical habitat and shall not begin work on the activity until notified by the District Engineer that the requirements of the ESA have been satisfied and that the activity is authorized. For activities that may affect Federally-listed endangered or threatened species or designated critical habitat, the notification must include the name(s) of the endangered or threatened species that may be affected by the proposed work or that utilize the designated critical habitat that may be affected by the proposed work. As a result of formal or informal consultation with the FWS or NMFS the District Engineer may add species-specific regional endangered species conditions to the NWPs. b. Authorization of an activity by a NWP does not authorize the "take" of a threatened or endangered species as defined under the ESA. In the absence of separate authorization (e.g., an ESA Section 10 Permit, a Biological Opinion with "incidental take" provisions, etc.) from the USFWS or the NMFS, both lethal and non-lethal "takes" of protected species are in violation of the ESA. Information on the location of threatened and endangered species and their critical habitat can be obtained directly from the offices of the USFWS and NMFS or their World Wide Web pages at http://www.fws.gov/r9endspp/endspp.html and http://www.nfms.noaa.gov/prot res/overview/es.html respectively. 12. Historic Properties. No activity that may affect historic properties listed, or eligible for listing, in the National Register of Historic Places is authorized, until the District Engineer has complied with the provisions of 33 CFR part 325. Appendix C. The prospective permittee must notify the District Engineer if the authorized aciiviry ma affect any- historic properties listed, determined to be eligible, or whirr the prospective permit= has reason to believe may be eiigibi° for listing on the Nationa:' Reriste: of Historic Places, and shall not begin tnt acin-i. - until notified by the District Enginee~ that the requirements of the National Historic Preservation Act have been satisfied and that the activity is authorized. Information on the location and existence of historic resources can be obtained from the State Historic Preservation Office and the National Register of Historic Places (see 33 CFR 330.4(g)). For activities that may affect historic properties listed in, or eligible for listing in, the National Register of Historic Places, the notification must state which historic property may be affected by the proposed work or include a vicinity map indicating the location of the historic property. 13. Notification. a. Timing; where required by the terms of the NV/`P, the prospective permittee must notify the District Engineer with a preconstruction notification (PCN) as early as possible. The District Engineer must determine if the notification is complete within 30 days of the date of recent and can request additional information necessary to make the PCN complete only once. However, if the prospective permittee does not provide all of the requested information, then the District Engineer will notify the prospective permittee that the notification is still incomplete and the PCN review process will not continence until all of the requested information has been received by the District Engineer. The prospective permittee shall not begin the activity: 1. Until notified in writing by the District Engineer that the activity may proceed under the NVJP with any special conditions imposed by the District or Division Engineer; or 5 2. If notified in writing by the District or Division Engineer that an Individual Permit is required; or 3. Unless 45 days have passed from the District Engineer's receipt of the complete notification and the prospective permittee has not received written notice from the District or Division Engineer. Subsequently, the permittee's right to proceed under the NWP may be modified, suspended, or revoked only in accordance with the procedure set forth in 33 CFR 330.5(d)(2). b. Contents of Notification: The notification must be in writing and include the following information: 1. Name, address and telephone numbers of the prospective permittee; 2. Location of the proposed project; 3. Brief description of the proposed project; the project's purpose; direct and indirect adverse environmental effects the project would cause; any other Nlv T(s), Regional General Permit(s), or Individual Permit(s) used or intended to be used to authorize any part of the proposed project or any related activity. Sketches should be provided when necessary to show that the activity complies with the terms of the NWP (Sketches usually clarify the project and when provided result in a quicker decision.); 4. For NWPs 7, 12, 14, 18, 21, 34, 38, 39, 40, 41, 42, and 43, flhe PCN must also include a delineation of affected special aquatic sites, including wetlands, vegetated shallows (e.g., submerged aquatic vegetation, seagrass beds', and riffie and pool complexes (see paragraph I3(f)); 5. For N)AT 7 (Cutfall Structures and Maintenance), the PCN must include information regarding the original design capacities and configurations of those areas of the facility where maintenance dredging or excavation is proposed; 6. For NWP 14 (Linear Transportation Projects), the PCN must include a compensatory mitigation proposal to offset permanent losses of wafers of the. US and a statement describing how temporary losses of waters of the US will be minimized to the maximum extent practicable; 7. For NWP 21 (Surface Coal Mining Activities), the PCN must include an. Office of Surface Mining (OSM) or state-approved mitigation plan, if applicable. To be authorized by this_NTWP, the District Engineer must determine that the activity complies with the terms and conditions of the NWP and that the adverse environmental effects are minimal both individually and cumulatively and must notify the project sponsor of this determination in writing; 8. For NWP 27 (Stream and Wetland Restoration Activities), the PCN must include documentation of the prior condition of the site that will be reverted by the permittee; 9. For - TWP 29 (Single-Family Housing), the PCN must also include: e i. Any past use of this N vVP by the Individual Permittee and/or the permittee's spouse; ii. A statement that the single-family housing activity is for a personal residence of the permittee; iii. A description of the entire parcel, including its size, and a delineation of wetlands. For the purpose of this NWP, parcels of land measuring \1/4\-acre or less will not require a formal on-site delineation. However, the applicant shall provide an indication of where the wetlands are and the amount of wetlands that exists on the property. For parcels greater than \1/4\-acre in size, formal wetland delineation must be prepared in accordance with the current method required by the Corps. (See paragraph 13(f)); iv. A written description of all land (including, if available, legal descriptions) owned by the prospective permittee and/or the prospective permittee's spouse, within a one mile radius of the parcel, in any form of ownership (including any land owned as a partner, corporation, joint tenant, co-tenant, or as a tenant-by-the-entirety) and any land on which a purchase and sale agreement or other contract for sale or purchase has been executed; 10. For NWT 31 (Maintenance of Existing Flood Control Facilities), the prospective permittee must either notify the District Engineer with a PCN prior to each maintenance activity or submit a five-year (or less) maintenance plan. In addition, the.PCN must include all of the following: i. Sufficient baseline information identifying the approved channel depths and configurations and existing faciiities. Minor deviations are authorized, provided the approved flood control protection or drainage is riot increased; ii. A delineation of any affected special aquatic sites, including wetlands; and, iii. Location of the dredged material disposal site; 11. For NVJP 33 (Temporary Construction, Access, and Dewatering), the PCN must also include a restoration plan of reasonable measures to avoid and minimize adverse effects to aquatic resources; 12. For NVTPs 39, 43 and 44, the PCN must also include a written statement to the District Engineer explaining how avoidance and minimization for losses of waters of the US were achieved on the project site; 13. For NWP 39 and NWP 42, the PCN must include a compensatory mitigation proposal to offset losses of waters of the US or justification explaining why compensatory mitigation should not be required. For discharges that cause the loss of greater than 300 linear feet of an intermittent stream bed; to be authorized, the District Engineer must determine that the - activity-c-6 mplies with the other terms and conditions of the NTWP, determine adverse environmental effects are minimal both individually and cumulatively, and waive the limitation on stream impacts in writing before the permittee may proceed; 14. For NWP 40 (Agricultural Activities), the PCN must include a compensatory mitigation proposal to offset losses of waters of the US. This NWP does not authorize the relocation of greater than 300 linear feet of existing serviceable drainage ditches constructed in non-tidal streams unless, for drainage ditches constructed in intermittent nontidal streams, the District Engineer waives this criterion in writing, and the District Engineer has determined that the project complies with all terms and conditions of this NVTP, and that any adverse impacts of the project on the aquatic environment are minimal, both individually and cumulatively; 15. For NWT 43 (Stormwater Management Facilities), the PCN must include, for the construction of new stormwater management facilities, a maintenance plan (in accordance with state and local requirements, if applicable) and a compensatory mitigation proposal to offset losses of waters of the US. For discharges that cause the loss of greater than 300 linear feet of an intermittent stream bed, to be authorized, the District Engineer must determine that the activity complies with the other terms and conditions of the NWP, determine adverse environmental effects are minimal both individually and cumulatively, and waive the limitation on stream impacts in writing before the permittee may proceed; 16. For NV T 44 (Mining Activities), the PCN must include a description of all waters of the US adversely affected by the project, a description of measures taken to minimize adverse effects to waters of the US, a description of measures taken to comply with the criteria of the NWP, and a reclamation plan (for all aggregate mining activities in isolated waters and non-tidal wetlands adjacent to headwaters and any hard rock/mineral mining activities); 17. For activities that may adversely affect Federally-listed endangered or threatened species, the PCN must include the name(s) of those endangered or threatened species that may be affected by the proposed work or utilize the designated critical habitat that may be affected by the proposed work; and 1 S. For activities that may affect historic properties listed in, or eligible for listing in, the National Register of Historic Places, the PCN must state which historic property may be affected by the proposed work or include a vicinity map indicating the location of the historic property. c. Form of Notification: The standard individual Permit application form (Form ENG 4345) may be used as the notification but must clearly indicate that it is a PCN and must include all of the information required in (b) (!)-(IS) of General Condition 13. A letter containing the requisite information may also be used. d. District Engineer's Decision: In reviewing the PCN for the proposed activity, the District. Engineer will determine whether the activity authorized by the NVjP will result in more than minimal individual or cumulative adverse environmental effects or may be contrary to the public interest. The prospective permittee may submit a proposed mitigation plan with the PCN to expedite the process. The District Engineer will consider any proposed compensatory mitigation the applicant has included in the proposal in determining whether the net adverse environmental effects to the aquatic environInentof the proposed work are minimal. I the District Engineer determines that the activity complies with the terms and conditions.of the. NWT and that the adverse effects on the aquatic environment are minimal, after considering mitigation. the District Engineer will notify the permittee and include any conditions the District Engineer deems necessary. The District Engineer must approve any compensatory mitigation proposal before the permittee commences work. If the prospective permittee is required to submit a compensatory mitigation proposal with the PCN, the proposal may be either conceptual or detailed. If the prospective permittee elects to submit a compensatory mitigation plan with the PCN, the District Engineer will expeditiously review the proposed compensatory mitigation plan. The District Engineer must review the plan within 45 days of receiving a complete PCN and determine whether the conceptual or specific proposed mitigation would ensure no more than minimal adverse effects on the aquatic environment. If the net adverse effects of the proj ect on the aquatic environment (after consideration of the compensatory mitigation proposal) are determined by the District Engineer to be minimal, the District Engineer will provide a timely written response to the applicant. The response will state that the project can proceed under the terms and conditions of the NWT. If the District Engineer determines that the adverse effects of the proposed work are more than minimal, then the District Engineer will notify the applicant either: 1. That the project does not qualify for authorization under the NWP and instruct the applicant on the procedures to seek authorization under an Individual Permit; 2. that the project is authorized under the NTWP subject to the applicant's submission of a mitigation proposal that would reduce the adverse effects on the aquatic environment to the minimal level; or 3. that the project is authorized under the NTVITP with specific modifications or conditions. Where the District 'ngineer determines that mitigation is required to ensure no more. than minimal adverse effects occur to the aquatic environment, the activity will be authorized within the 45-day PCN period. The authorization will include the necessary conceptual or specific mitigation or a requirement that the applicant submit a mitigation proposal that would reduce the adverse effects on the aquatic environment to the minimal level. When conceptual mitigation is included, or a mitigation plan is required under item (2) above, no work in waters of the US will occur until the District Engineer has approved a specific mitigation plan. e. Agency Coordination: The District Engineer- will consider any comment: from Federal and state agencies concerning the proposed activity's compliance with the terms and conditions of the NIX Ps and the need for mitigation to reduce the project's adverse enviroimlental effects to a minimal level. For activities requiring notification to the District Engineer that result in the loss of greater than \1/2\-acre of waters of the US, the District Engineer will provide immediately (e.g., via facsimile transmission, overnight mail, or other expeditious manner) a copy to the appropriate Federal or state offices (-tJSFWS, state natural resource or water quality agency, EPA; State Historic Preservation Officer (SHPO), and, if appropriate, the NMFS). With the exception of NWP 37, these agencies will then have 10 calendar days from the date the material is transmitted fo telephone or fax the- District Engineer notice that they intend to provide substantive, site-specific comments. If so contacted by an agency, the District Engineer will wait an additional 15 calendar days before malting a decision on the notification. The District Engineer willfully consider agency comments received within the specified time frame, but will provide no response to the resource agency, except as provided below. The District Engineer will indicate in the administrative record associated with each notification that the resource agencies' concerns were considered. As required by section 305(b)(4)(B) of the Magnuson-Stevens Fishery Conservation and Management Act, the District Engineer will provide a response to NMFS within 30 days of receipt of any Essential Fish Habitat conservation recommendations. Applicants are encouraged to provide the Corps multiple copies of notifications to expedite agency notification. f. Wetland Delineations: Wetland delineations must be prepared in accordance with the current method required by the Corps (For NWP 29 see paragraph (b)(9)(iii) for parcels less than 01/4\-acre in size). The permittee may ask the Corps to delineate the special aquatic site. There may be some delay if the Corps does the delineation. Furthermore, the 45-day period will not start until the wetland delineation has been completed and submitted to the Corps, where appropriate. 14. Compliance Certification. Every permittee who has received NWP verification from the Corps will submit a signed certification regarding the completed work and any required mitigation. The certification will be forwarded by the Corps with the authorization letter and will include: a. A statement that the authorized work was done in accordance with the Corps authorization, including any general or specific conditions; b. A statement that any required mitigation was completed! in accordance with the permit conditions; and c. The signature of the permittee certifying the completion of th:. work and mitigation. 15. Use of Multiple Nationwide. Permits. The use of more than one NWP for a single and complete project is prohibited, except when the acreage loss of waters of the US authorized by the NWPs does not exceed the acreage limit of the NWT with the highest specified acreage limit (e.g. if a road crossing over tidal waters is constructed under NWP 14, with associated bank stabilization authorized by --N-WP 13, the maximum acreage loss of waters of the US for the total project cannot exceed \ 1/3\-acre) . 16. Water Supply hitakes. No activity, including structures and work in navigable waters of the US or discharges of dredged or fill material, may occur in the proximity of a public water supply intake except where the activity is for repair of the public water supply intake structures or adjacent bank stabilization. 17. Shellfish Beds. No activity, including 'structures and work in navigable waters of the US or discharges of dredged or fill material, may occur in areas of concentrated shellfish populations, unless the activity is directly related to a shellfish harvesting activity authorized by NVATP 4. 10 18, Suitable Material. No activity. including structures and work in navigable waters of the LJS or discharges of dredged or fill material, may consist of unsuitable material (e.g.. trash, debris, car bodies. asphalt, etc.) and material used for construction or discharged must be free from toxic pollutants in toxic amounts (see section 307 of the CWA). 19. Mitigation. The District Engineer will consider the factors discussed below when determining the acceptability of appropriate and practicable mitigation necessary- to offset adverse effects on the aquatic environment that are more than minimal. a. The project must be designed and constructed to avoid and minimize adverse effects to waters of the US to the maximum extent practicable at the project site (i.e., on site). b. Mitigation in all its forms (avoiding, minimizing, rectifying, reducing or compensating) will be required to the extent necessary to ensure that the adverse effects to the aquatic environment are minimal. c. Compensatory mitigation at a minimum one-for-one ratio will be required for all wetland impacts requiring a PCN, unless the District Engineer determines in writing that some other form of mitigation would be more environmentally appropriate and provides a project-specific waiver of this requirement. Consistent with National policy, the District Engineer will establish a preference for restoration of wetlands as compensatory mitigation, with preservation used only in exceptional circumstances. d. Compensatory mitigation (i.e.. replacement or substitution o= aquatic resources for those impacted) will not be used to increase the acreage losses allowed by the acreage limits of some of the N)WPs. For example. \i /4`,-acre of wetlands cannot be created to change ,acre loss of wetlands to a \1/2\-acre loss associated with NWP 39 verification. However. \r'?1-acre of created wetlands can be used to reduce the impacts of a \1/2\-acre loss of wetlands to the minimum impact level in order to meet the minimal impact requirement associated with NV7Ps. e. To be practicable, the mitigation must be available and capable of being done considering costs, existing technology, and logistics in light of the overall project purposes. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project- establishing and maintaining wetland or upland vegetated buffers to protect open waters such as .streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferably in the same watershed. f. Compensatory mitigation plans for projects in or near streams or other open waters will normally include a requirement for the establishment, maintenance, and legal protection (e.g.,-.easements,--deed restrictions) of vegetated buffers to open waters. In many cases, vegetated buffers will be the only compensatory mitigation required. Vegetated buffers should consist of native species. The width of the vegetated buffers required will address documented water quality or aquatic habitat loss concerns. Normally, the vegetated buffer will be 25 to 50 feet wide on each side of the stream. but the District Engineers may require slightly wider vegetated buffers to address documented water quality or habitat loss concerns. Where both wetlands and open waters exist on the project site, the Corps will determine the appropriate compensator, mitigation (e.g., stream buffers or wetlands compensation) based on what is best for the aquatic environment or, a watershed basis. In cases where vegetated buffers are determined to be the most appropriate form of compensatory mitigation, the District Engineer may waive or reduce the requirement to provide wetland compensatory mitigation for wetland impacts. g. Compensatory mitigation proposals submitted with the " notification' may be either conceptual or detailed. If conceptual plans are approved under the verification, then the Corps will condition the verification to require detailed plans be submitted and approved by the Corps prior to construction of the authorized activity in waters of the US. h. Permittees may propose the use of mitigation banks, in-lieu fee arrangements or separate activity-specific compensatory mitigation. In all cases that require compensatory mitigation, the mitigation provisions will specify the parry responsible for accomplishing and/or complying with the mitigation plan. 20. Spawning Areas. Activities, including structures and work in navigable waters of the US or discharges of dredged or fill material, in spawning areas during spawning seasons must be avoided to the maximum extent practicable. Activities that result in the physical destruction (e.g., excavate, fill, or smother downstream by substantial turbidity) of an important spawning area are not authorized. 21. Management of Water Flows. To the maximum extent practicable, the activity must be designed to maintain preconstruction downstream flow conditions (e.g., location, capacity, and flow rates). Furthermore, the activity must not permanently restrict or impede the passage of normal or expected high flows (unless the primary- purpose of the fill is to impound waters) and the structure or discharge of dredged or fill material must withstand expected high fl ows. The activity must, to the maximum extent practicable. provide, for retaining excess flows from the site, provide for maintaining surface flow rates from the site similar to preconstruction conditions, and provide for not increasing water flows.from the project site, relocating water, or redirecting water flow beyond preconstruction conditions. Stream channelizing will be reduced to the minimal amount necessary, and the activity must, to the maximum extent practicable, reduce adverse effects such as flooding or erosion downstream and upstream of the project site, unless the activity is part of a larger system designed to manage water flows. In most cases, it will not be a requirement to conduct detailed studies and monitoring of water flow. This condition is only applicable to projects that have the potential to affect waterflows. While appropriate measures must be taken, it is not necessary to conduct detailed studies to identify such measures or require monitoring to ensure their effectiveness. Normally, the Corps will defer to state and local authorities regarding management of water flow. 22. _Adverse_ Effects From Impoundments. If the activity creates an impoundment of water, adverse effects to the aquatic system due to the acceleration of the passage of water, and/or the restricting its flow shall be minimized to the maximum extent practicable. This includes structures and work in navigable waters of the US, or discharges of dredged or fill material. 23. Waterfowl Breeding Areas. Activities, including structures and work in naviga e waters of the US or discharges of dredged or fill material, into breeding areas for migratory waterfowl must be avoided to the maximum extent practicable. 12. 24. Removal of Temporary Fills. Any temporary fills must be removed in their entirety and the affected areas returned to their preexisting elevation. 25. Designated Critical Resource Waters. Critical resource waters include, NOAA-designated marine sanctuaries, National Estuarine Research Reserves, National Wild and Scenic Rivers, critical habitat for Federally listed threatened and endangered species, coral reefs, state natural heritage sites, and outstanding national resource waters or other waters officially designated by a state as having particular environmental or ecological significance and identified by the District Engineer after notice and opportunity for public conuuent. The District Engineer may also designate additional critical resource waters after notice and opportunity for comment. a. Except as noted below, discharges of dredged or fill material into waters of the US are not authorized by NWPs 7. 12, 14, 16, 17, 21, 29, 31, 35, 39, 40, 42, 43, and 44 for any activity within, or directly affecting, critical resource waters, including wetlands adjacent to such waters. Discharges of dredged or fill materials into waters of the US may be authorized by the above NWPs in National Wild and Scenic Rivers if the activity complies with General Condition 7. Further, such discharges may be authorized in designated critical habitat for Federally listed threatened or endangered species if the activity complies with General Condition 11 and the USFWS or the NMFS has concurred in a determination of compliance with this condition. b. For NV,/Ts 3, 8, 10, 13, 15, 18, 19, 22, 23, 25, 27, 28, 30, 33, 34, 36, 37, and 38, notification is required in accordance with General Condition 13, for any activity proposed in the designated critical resource waters including wetlands adjacent to those waters. The District Engineer may authorize acu vies ur cae tiiesc N vvr ; only a ue_, rc is deternninea trWL the impacts to the critical resource: waters will be no more than minimal. 26. Fills Within 100- _ear Floodplains. For purposes of this General Condition, 100-year floodplains will be identified through the existing Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps or FEMA-approved local floodplain maps. a. Discharges in Floodplain,- Below Headwaters. Discharges of dredged or fill material into waters of the US within the mapped 100year floodplain, below headwaters (i.e. five efs), resulting in permanent above-grade fills, are not authorized by NWPs 39, 40, 42, 43, and 44. b. Discharges in Floodway; Above Headwaters. Discharges of dredged or fill material into waters of the US within the FEMA or locally mapped Foodway, resulting in permanent above-grade fills, are not authorized by NWPs 39, 40, 42, and 44. c. The permittee must comply with any applicable FEMA-approved state or local floodplain management requirements. 27. Construction Period. For activities that have not been verified by the Corps and the project was commenced or under contract to commence by the expiration date of the NWP (or modification or revocation date), the work must be completed within 12-months after such date (including any modification that affects the project). =3 For activities that have been verified and the project was commenced or under contract io commence within the verification period. the work must be completed by the date determined by the Corps. For projects that have been verified by the Corps, an extension of a Corps approved completion date maybe requested. This request must be submitted at least one month before the previously approved completion date. FURTHER INFORMA'T'ION 1. District Engineers have authority to determine if an activity complies with the terms and conditions of a NWP. 2. NV,/Ts do not obviate the need to obtain other Federal, State, or local permits, approvals, or authorizations required by law. 3. NWPs do not grant any property rights or exclusive privileges. 4. NVTPs do not authorize any injury to the property or rights of others. 5. NVATPs do not authorize interference with any existing or proposed Federal project. DEF) TIONS Best Management Practices (Bly0s): BMPs are policies, practices, procedures, or structures implemented to mitigate the adverse environmental effects on surface water quality resulting from development. BN Ps are categorized as structural or nonstructural. A BMP policy may affect the limits on a development. Compensatory MitiZation: For purposes of Section 10/404, compensatory mitigation is the restoration, creation, enhancement; or in exceptional circumstances, preservation of wetlands and/or other aquatic resources for the purpose of compensating for unavoidable adverse impacts, which remain, after all appropriate and practicable avoidance and minimization has been achieved. Creation: The establishment of a wetland or other aquatic resource where one did not formerly exist. Enhancement: Activities conducted in existing wetlands or other aquatic resources that increase one or more aquatic functions. Rohemeral Stream: An ephemeral stream has flowing water only during and for a short duration after, precipitation events in a typical year. Ephemeral stream beds are located above the water table year-round. Groundwater is not a source of water for the stream. Runnoff from rainfall is the primary source of water for stream flow. -1 a Farm Tract: A unit of contiguous land under one ownership that is operated as a farm or part of a farm. Flood Fringe: That portion of the 100-year floodplain outside of the floodway (often referred to as "floodway fringe"' . Floodwav: The area regulated by Federal, state, or local requirements to provide for the discharge of the base flood so the cumulative increase in water surface elevation is no more than a designated amount (not to exceed one foot as set by the National Flood Insurance Program) within the 100-year floodplain. Independent Utility: A test to determine what constitutes a single and complete project in the Corps regulatory program. A project is considered to have independent utility if it would be constructed absent the construction of other projects in the project area. Portions of a multi- phase project that depend upon other phases of the project do not have independent utility. Phases of a project that would be constructed even if the other phases were not built can be considered as separate single and complete projects with independent utility. Intermittent Stream: An intermittent stream has flowing water during certain times of the year, when groundwater provides water for stream flow. During dry periods, intermittent streams may not have flowing water. Runoff from rainfall is a supplemental source of water for stream flow. LOSS of waters of the US: Waters of the US that include the filled area and other waters that are permanently adversely affected by flooding, excavation. or drainage because of the regulated activity. Permanent adverse effects include permanent above-grade, at-grade, or below-grade fills tha change an aquatic area to dry land, increase the bottom elevation of a waterbody, or change the use of a waterbody. The acreage of loss of waters of the US is the threshold measurement of the impact to existing waters for determining whether a project may qualify for a NWP: it is not a net threshold that is calculated after considering compensatory mitigation that maybe used to offset losses of aquatic functions and values. The loss of stream bed includes the linear feet of.stream bed that is filled or excavated. Waters of the US temporarily filled, flooded, excavated, or drained, but restored to preconstruction contours and elevations after construction, are not included in the measurement of loss of waters of the US. Impacts to ephemeral waters are only not included in the acreage or linear foot measurements of loss of waters of the US or loss of stream bed, for the purpose of determining compliance with the threshold limits of the NWPs. Non-tidal YVetland: An area that, during a year with normal patterns of precipitation has standing or flowing water for sufficient duration to establish an ordinary high water mark. Aquatic vegetation. within.the area of standing or flowing water is either non-emergent, sparse, or absent. Vegetated shallows are considered to be open waters. The term "open water" includes rivers, streams, lakes, and ponds. For the purposes of the NWPs, this term does not include ephemeral waters. Perennial Stream: A perennial stream has flowing water year-round during a typical year. The water table is located above the stream bed for the most of the year. Groundwater is the primary ,C? source of water for stream flow. Runoff from rainfall is a supplemental source of water for stream flow. Permanent Above-y-ade Fill: A discharge of dredged or fill material into waters of the US, including wetlands, that results in a substantial increase in ground elevation and permanently converts part or all of the waterbody to dry land. Structural fills authorized by NWPs 3,225, 36, etc. are not included. Preservation: The protection of ecologically important wetlands or other aquatic resources in perpetuity through the implementation of appropriate legal and physical mechanisms. Preservation may include protection of upland areas adjacent to wetlands as necessary to ensure protection and/or enhancement of the overall aquatic ecosystem. Restoration: Re-establishment of wetland and/or other aquatic resource characteristics and function(s) at a site where they have ceased to exist, or exist in a substantially degraded state. Riffle and Pool Compl : Riffle and pool complexes are special aquatic sites under the 404(b)(1) Guidelines. Riffle and pool complexes sometimes characterize steep gradient sections of streams. Such stream sections are recognizable by their hydraulic characteristics. The rapid movement of water over a course substrate in riffles results in a rough flow, a turbulent surface and high dissolved oxygen levels in the water. Pools are deeper areas associated with riffles. A slower stream velocity, a streaming flow, a smooth surface, and a finer substrate characterize pools. Single and Complete Prot: The term "single and complete project" is defined at 33 CFR 330.2(1) as the total project proposed or accomplished by one owner/developer or partnership or other association of owners/developers (see definition of independent utility). For linear projects, .the "single and complete project" (i.e., a single and complete crossing) will apply to each crossing of a separate water of the US (i.e., a single water-body) at that location. An exception is for linear projects crossing a single waterbody several times at separate and distant locations; each crossing is considered a single and complete project. However, individual channels in a braided stream or river, or individual arms of a large, irregularly shaped wetland or lake, etc., are not separate waterbodies. Stormwater Management: Stormwater management is the mechanism for controlling stormwater runoff for the purposes of reducing downstream erosion, water quality degradation, and flooding and mitigatinD the adverse effects of changes in land use on the aquatic environment. Stormwater Management Facilities: Stormwater management facilities are those facilities, including but not limited to, stormwater retention and detention ponds and BMPs, which retain water for a period of time to control runoff and/or improve the quality (i.e., by reducing the concentration of nutrients, sediments, hazardous substances and other pollutants) of stormwater runoff. Stream Channelization: The manipulation of a stream channel to increase the rate of water flow through the stream channel. Manipulation may include deepening, widening. straightening; armoring, or other activities that change the stream cross-section or other aspects of stream ?_ 6 channel geometry to increase the rate of water flow through the stream channel. A channelized stream remains a water of the US, despite the modifications to increase the rate of water flow. Tidal Wetland: A tidal wetland is a wetland (i.e., water of the US) that is inundated by tidal waters. The definitions of a wetland and tidal waters can be found at 33 CFR 328.3(b) and 33 CFR 328.3(f), respectively. Tidal waters rise and fall in a predictable and measurable rhythm or cycle due to the gravitational pulls of the moon and sun. Tidal waters end where the rise and fall of the water surface can no longer be practically measured in a predictable rhythm due to mashing by other waters, wind, or other effects. Tidal wetlands are located channelward of the high tide line (i.e., spring high tide line) and are inundated by tidal waters two times per lunar month, during spring high tides. T%getated Buffer: A vegetated upland or wetland area next to rivers, streams, lakes, or other open waters, which separates the open water from developed areas, including agricultural land. Vegetated buffers provide a variety of aquatic habitat functions and values (e.g., aquatic habitat for fish and other aquatic organisms, moderation of water temperature changes, and detritus for aquatic food webs) and help improve or maintain local water quality. A vegetated buffer can be established.by maintaining an existing vegetated area or planting native trees, shrubs, and herbaceous -plants on land next to openwaters. Mowed lawns are not considered vegetated buffers because they provide little or no aquatic habitat functions and values. The establishment and maintenance of vegetated buffers I a method of compensatory mitigation that can be used in conjunction with the restoration, creation, enhancement or preservation of aquatic habitats to ensure that activities authorized by N)N Ps result in minimal adverse effects to the aquatic environment.. (See General Condition i95.) T%ezetaied Shallow,-. Vegetated shallows are special aquatic sites under the 404(b)(1) Guidelines. They are areas that are permanently inundated and under normal circumstances have rooted aquatic vegetation. such as seagrasses in marine and estuarine systems and a variety of vascular rooted plants it freshwater systems. TITaterbodv: A waterbody is any area that in a normal year has water flowing or standing above ground to the extent that evidence of an ordinary high water mark is established. Wetlands contiguous to the waterbody are considered part of the waterbody. FINAL REGIONAL CONDITIONS FOR NATIONWIDE PERPdIITS IN THE WILMINGTON DISTRICT 1. Waters Excluded from NWP or Subject to Additional Notification Requirements: a. The Corps identified waters that will be excluded from use of this NW?. These waters are: 1. Discharges into Waters of the United States designated by either the North Carolina Division of Marine Fisheries (NCDMF) or the North Carolina Wildlife Resources Commission (NCWRC) as anadromous fish spawning area are prohibited during the period between February, 1 and June 30, without prior written approval from NCDMF or NCWRC and the Corps. 17 2. Discharaes into Waters of the. United States designated as sturgeon spawning areas are prohibited during the period between February 1 and June 30, without prior written approval from the National Marine Fisheries Service (NMFS). b. The Corps identified waters that will be subject to additional notification requirements for activities authorized by this NWP. These waters are: 1. Prior to the use of any NWP in any of the following North Carolina designated waters, applicants must comply with Nationwide Permit General Condition 13. In addition, the applicant must furnish a written statement of compliance with all of the conditions of the applicable Nationwide Permit. The North Carolina designated waters that require additional notification requirements are "Outstanding Resource Waters" (ORW) and "High Quality Waters" (HQW) (as defined by the North Carolina Division of Water Quality), or "Inland Primary Nursery Areas" (IPNA) (as defined by the North Carolina Wildlife Resources Commission), or contiguous wetlands (as defined by the North Carolina Division of Water Quality), or "Primary Nursery Areas" (PNA) (as defined by the North Carolina Division of Marine Fisheries). 2: Applicants for any NWP in a designated "Area of Environmental Concern" (AEC) in the twenty (20) coastal counties of Eastern North Carolina covered by the North Carolina Coastal Area Management Act (CAMA), must also obtain the required CAMA permit. Construction activities may not commence until a copy of the approved CAMA permit is furnished to the appropriate Wilmington District Regulatory Field Office (Wilmington Field Office - P.O. Box 1890, Wilmington, NC 28402 or Washington Field Office - P.O. Box 1000, Washington, NC 27889) for authorization to begin work. 3. Prior to the use of any NWP on a Barrier Island of North Carolina, applicants must comply with Nationwide Permit General Condition 13. In addition, the applicant shall furnish a written statement of compliance with all of the conditions listed of the applicable Nationwide Permit. 4. Prior to the use of any NWP in a "Mountain or Piedmont Bog" of North Carolina, applicants shall comply with Nationwide Permit General Condition 13. In addition, the applicant shall furnish a written statement of compliance with all of the conditions listed of the applicable NWT. Note: The following wetland community types identified in the NT.C. Natural Heritage Program document, "Classification of Natural communities of North Carolina (Michael P. Schafale and Alan S. Weakley, 1990), are subject to this regional condition. Mountain Boas Swamp Forest-Bog Complex Swamp Forest-Bog Complex (Spruce Subtype) Southern Appalachian Bog (Northern Subtype) Southern Appalachian Bog (S6dthern Subtype Southern Appalachian Fen Piedmont Boas Upland Depression Swamp Forest 6 Prior to the use of any NWP in Mountain Trout Waters within twenty-five (25) designated counties of North Carolina, applicants shall comply with Nationwide General Condition 13. In addition, the applicant shall furnish a written statement of compliance with all of the conditions listed of the applicable NTWP. Notification will include a letter of comments and recommendations from the North Carolina) ildlife Resources Commission (NCVVRC), the location of work, a delineation of wetlands, a discussion of alternatives to working in the Mountain Trout Waters, why other alternatives were not selected, and a plan to provide compensatory- mitigation for all unavoidable adverse impacts to the Mountain Trout Waters. To facilitate coordination with the NC`VRC, the proponent may provide a copy of the notification to the NCWRC concurrent with the notification to the District Engineer. The NCWRC will respond both to the proponent and directly to the Corps of Engineers. The twenty-five (25) designated counties are: Alleghany Ashe Avery Yancey Buncombe Burke Caldwell Wilkes Cherokee Clay Graham Swain Haywood .. Henderson Jackson Surry Macon Madison McDowell Stokes Mitchell Polk Rutherford Transylvania Watauga 6. Applicants shall notify the NCDENR Shellfish Sanitation Section prior to dredging in or removing sediment from an area closed to shell fishin, where the ef-Iluent may be released to an area open for shell fishing or swimming in order to avoid contamination of the disposal area and allow a temporary shellfish closure to be made. Any disposal of and to the beach should occur between November 1 and April 30 when recreational usage is how. Only clean sand should be used and no dredged sand from closed shell fishing areas. If beach disposal was to occur at times other than stated above or ii sand from a closed shell fishing area is to be used, a swim advisory shall be posted and a press release shall be made. NCDENR Shellfish Sanitation Section must be notified before commencing this activity. 2. List of Final Corps Regional Modifications and Conditions for All Nationwide Permits a. Individual or multiple Nl'?N'Ps may not be used for activities that result to the cumulative loss or degradation of greater than 300 total linear feet of perennial streambed or intermittent streambed that exhibits important aquatic function(s). b. Prior to the use of any NWP (except 13, 27, and 39) for any activity that has more than a total of 150 total linear feet of perennial streambed impacts or intermittent streambed impacts (if the intermittent stream has important aquatic function), the applicant must comply with Nationwide Permit General Condition 13. In addition, the applicant shall furnish a written statement of compliance with all of the conditions listed of the applicable NWT. Compensatory mitigation is typically required for any impact that requires such notification. [Note: The Corps uses the Intermittent Channel Evaluation Form, located with Permit Information on the Re`ulatoryPro`ram VJeb Sife: to aid-in the deterininatioh of tlfe-iriteruuttent chanilel stream status. Also, NWPs 13, 27 and 39 have specific reporting requirements.] 1 9 c. For all Nationwide Permits which allow the use of concrete as a building material, measures will be taken to prevent live or fresh concrete, including bags of uncured concrete, from coming into contact with waters of the state until the concrete has hardened. d. For all Nationwide Permits that allow for the use of riprap material for bank stabilization, filter cloth must be placed underneath the riprap as an additional requirement of its use in North Carolina waters. e. For all NWPs that involve the construction of culverts, measures will be included in the construction that will promote the safe passage of fish and other aquatic organisms. All culverts in the 20 CAMA coastal counties must be buried to a depth of one foot below the Roadway Approach Fill Bara fuIl Culvert buried below strearnbed to appropriate Stream depth Bottom bed of the stream or wetland. For all culvert construction activities, the dimension, pattern , and profile of the stream, (above and below a pipe or culvert), should not be modified by widening the stream channel or by reducing the depth of the stream. Culvert inverts will be buried at least one foot below- the bed of the stream for culverts greater than 48 inches in diameter. For culverts 48 inches in diameter or smaller, culverts must be buried below the bed of the stream to a depth equal to or greater than 20 percent of the diameter of the culvert. Bottomless arch culverts will satisfy this condition. A waiver from the depth spe:.iflcations in this Regional Condition may be requested in writing. The waiver will only be issued if it can be demonstrated that the impacts of compiving with this Regional Condition would result in more adverse impacts to the aquatic environment. 3. Additional Regional Conditions Applicable to this Nationwide Permit a. Discharges in wetlands and in perennial streams for stormwater management facilities are prohibited under this NWT. b. Single-family recreational facilities are not authorized under NWT 3°. Recreational facilities, if they are incorporated into and serving an entire residential. commercial. or institutional development, can be authorized by this NWT. NORTH CAROLINTA DBUSION OF WATER QUALITY GENERAL CERTIFICATION CONDITIONS GS3362 1. Enumerating and Reporting of Impacts: __ a -- Streams- -Impacts- to streams -as determined by the.Division of Water Quality shall be - measured as length of the centerline of the normal flow channel. Permanent and/or temporary stream impacts shall be enumerated on the entire project for all impacts regardless of which 404 Nationwide Permits are used. Stream relocations and streambed and/or banl: hardening are 20 considered to be permanent stream impacts. Any activity that. results in a loss of use of stream functions including but not limited to filling, relocating. flooding, excavation, dredging and complete shading shall be considered stream impacts. Enumeration of impacts to streams shall include streams enclosed by bottomless culverts, bottomless arches or other spanning structures when a 404 Permit is used anywhere in a project unless the entire structure (including construction impacts) spans the entire bed and both banks of the stream; is only used for a road, driveway or path crossing, and is not mitered to follow the stream pattern. Impacts for dam footprints and flooding will count toward the threshold for stream impacts, but flooding upstream of the dam will not (as long as no filling, excavation, relocation or other modification of the existing stream dimension, pattern or profile occurs) count towards mitigation. b. Wetlands - Impacts to wetlands as determined by the Division of Water Quality shall be measured as area. Permanent and/or temporary wetland impacts shall be enumerated on the entire project for all impacts regardless of which 404 Nationwide Permits are used. Any activity that results in a loss of use of wetland functions including but not limited to filling, excavating,, draining, and flooding shall be considered wetland impacts. Enumeration of impacts to wetlands shall include activities that change the hydrology of a wetland when a 404 Permit is used anywhere in?a project. c. Lakes and Ponds - Impacts to waters other than streams and wetlands as determined by the Division of Water Quality shall be measured as area. Permanent and/or temporary water impacts shall be enumerated on the entire project for all impacts proposed regardless of which 404 Nationwide Permits are used. Any activity that results in a loss of use of aquatic functions including but not limited to filling and dredging shall be considered waters impacts. ApplicaLiat Thresholds - Stream. wetland and water impacts that exceed any of the thresholds below require a complete application and written concurrence to use this Certification: Total stream impacts of greater or equal to 15 0 cumulative feet of stream length for the entire project require written notification to and approval b-,,, the Division of Water Quality, and/or Impacts to waters of equal to or greater than 1/3 of an acre require written notification to and approval by the Division of Water Quality, and/or Wetland impacts of greater or equal to 1/3 of an acre east of -95 and 1/10 of an acre west of I-95 require written notification to and approval by the Division of Water Quality except as specified below. Any impacts to wetlands adjacent to waters designated as ORW, SA, 'VVS-I, WS-11 or Trout or are designated as a North Carolina or National Wild and Scenic River and wetlands classified as SWL and/or UWL as well as wetlands described in 15A NCAC 2H .0506 (e) require a complete application and written concurrence from the Division of Water Quality to use this Certification. These thresholds apply for the entire proj ect regardless of the number of Nationwide Permits applicable to the Certification that are issued by the USACE for the project; Written notification to DWQ is required for all applications that propose to use Nationwide Permit 1 S. This notification requirement will be satisfied by providing two (2) copies of Elie-e PCN form to DWQ- of the same fine that the PCN form is sent to the US Army Corps of Engineers. A formal application and fee is not required unless DWQ decides that an Individual 2-1 Certification will be. required for the project. In this case, the applicant will be notified in writing from DWQ within 30 days of the receipt of the written notification. Proposed fill or substantial modification of any amount of wetlands classified in accordance with 15A NCAC 2B .0101(e)(7) as Unique Wetlands (UViTL) shall require written concurrence from the Division of Water Quality; 2. Impacts to any stream length in the Neuse, Tar-Pamlico or Randleman River Basins (or any other major river basins with Riparian Area Protection. Rules [Buffer Rules] in effect at the time of application) requires written concurrence for this Certification from DWQ in accordance with 15A NCAC 2B.0200. Activities listed as "exempt" from these rules do not need to apply for written concurrence under this Certification. New development activities located in the protected 50-foot wide riparian areas (whether jurisdictional wetlands or not) within the Neuse and Tar- Pamlico River Basins shall be limited to "uses" identified within and constructed in accordance with 15A NCAC 2B .0200. All new development shall be located, designed, constructed, and maintained to have minimal disturbance to protect water quality to the maximum extent practicable through the use of best management practices; 3. Additional site-specific stormwater management requirements may be added to this Certification at DWQ's discretion. on a case-by-case basis for projects that have or are anticipated to have impervious cover of greater than 30 percent. Site-specific stormwater management shall be designed to remove b'5°ro TSS according to the latest version of DWQ's Stormwater Best Management Practices manual at a minimum. Additionally, in watersheds within one mile and draining to 303(d) listen waters, as well as watersheds that are classified as nutrient sensitive waters (NSW), wafer supply waters (VG'S), trout waters (Tr), high quality waters (HQW), and outstanding resource waters (ORW), the Division shall require that extended detention wetlands, bio-retention areas, and ponds followed by forested filter strips (designed according to latest version of the NC DENR Stormwater Best Management Practices Manual) be constructed as part of the stormwater management plan when a site-specific stormwater management plan is required. For streams classified as Water Supply, High Quality Waters and Outstanding Resource Waters, post-construction, on-site stormwater management shall be required as appropriate and as outlined in 15A NCAC 2B .0104(m) and 2H .1000 to .1007, respectively, in addition to that required in this General Certification. Alternative designs may be requested by the applicant and will be reviewed on a case-by-case basis by the Division of Water Quality. Approval of stormwater management plans by the Division of Water Quality's other existing state stormwater programs including appropriate local programs are sufficient to satisfy this Condition as long as the stormwater management plans meet or exceed the design requirements specified in this condition. This condition applies unless more stringent requirements are in effect from other state water quality programs. Unless specified otherwise in the approval letter, the final, written stormwater management plan shall be approved in writing by the Division of Water Quality's Wetlands Unit before the impacts specified in this Certification occur. Tlie facilities inusfbe designed to treat the runoff from the entire project; unless otherwise explicitly approved by the Division of Water Quality. 22 Also, before any permanent building or other structure is occupied at the subject site, the facilities (as approved by the Wetlands Unit) shall be constructed and operational, and the stormwater management plan (as approved by the Wetlands Unit) shall be implemented. The structural stormwater practices as approved by the Wetlands Unit as well as drainage patterns must be maintained in perpetuity. No changes to the structural stormwater practices shall be made without written authorization from the Division of Water Quality. 4. Compensatory stream mitigation shall be required at a 1:1 ratio for all perennial and intermittent stream impacts equal to or exceeding 150 feet and that require application to DWQ in watersheds classified as ORW, HQW, Tr, WS-I and WS-II; 5. In accordance with North Carolina General Statute Section 143-2153D(e), any application for a 401 Water Quality Certification must include the appropriate fee. If a project also requires a CAMA Permit, one payment to both agencies shall be submitted and will be the higher of the two fees; 6. In accordance with 15A NCAC 2H.0506 (h) compensatory mitigation may be required for impacts to 150 linear feet or more of streams and/or one acre or more of wetlands for an entire project. For linear public transportation projects, impacts equal to or exceeding 150 feet per stream may require mitigation. In addition, buffer mitigation may be required for any project with Riparian Area Protection Ruies (Buffer Rules) in effect at the time of application for buffer impacts resulting from activities classified as "allowable with mitigatior_?" within the "Table of Uses" section of the Buffer Ruies or require a variance under the Buffer Rules. A determination of buffer, wetland and stream mitigation requirements shall be made for any Certification for this Nationwide Permi.. The most current design and monitoring protocols from DWQ shall be followed and written plans submitted for DWQ approval as required in those protocols. When compensatory mitigation is required for a project, the mitigation plans must be approved by DWQ in writing before the impacts approved by the Certification occur, unless otherwise specified in the approval letter. The mitigation plan must be implemented and/or constructed before any permanent building or structure on site is occupied. hi the case of public road projects, the mitigation plan mus" be impiementec before the roar is opened to tn-,traveiirl ptibiic. Please note that if a stream relocation is conducted as a stream restoration as defined in The Internal Technical Guide Tor Stream Work in North Carolina, April 2001, the restored length can be. used as compensatory mitigation for the impacts resulting from the relocation; 7. For any project involving re-alignment of streams, a stream relocation plan must be included with the 401 application for written DWQ approval. Relocated stream designs should include the same dimensions, patterns and profiles as the existing channel (or a stable reference reach if the existing channel is unstable), to the maximum extent practical. The new channel should be constructed in the dry and water shall not be turned into the new channel until the banks are stabilized. Vegetation used for bans: stabilization shall be limited to native woody species, and should include establishment of a_30 foot wide wooded and an adjacent 20 foot wide vegetated buffer on both sides of the relocated channel to the maximum extent practical. A transitional phase incorporating coir fiber and seedling establishment is allowable. Also, rip-rap, A-Tacks, ?3 i I concrete, gabions or other hard structures may be allowed .if it is necessary to maintain the physical integrity of the stream, but the applicant must provide written justification and any calculations used to determine the extent of rip-rap coverage requested. If suitable stream mitigation is not practical on-site, then stream impact will need to be mitigated elsewhere. Please note that if a stream relocation is conducted as a strearn restoration as defined in The Internal Technical Guide for Stream Work in North Carolina, April 2001, the restored length can be used as compensatory mitigation for the impacts resulting from the relocation; S. Placement of culverts and other structures in waters, streams, and wetlands must be placed below the elevation of the streambed to allow low flow passage of water and aquatic life unless it can be shown to DWQ that providing passage would be impractical. Design and placement of culverts including open bottom or bottomless arch culverts and other structures including temporary erosion control measures shall not be conducted in a manner that may result in aggradation, degradation or significant changes in hydrology of wetlands or stream beds or banks, adjacent to or upstream and down stream of the above structures. The applicant is required to provide evidence that the equilibrium shall be maintained if requested to do so in writing by DWQ. Additionally, when roadways, causeways or other fill projects are constructed across FEMA-designated floodways or wetlands, openings such as culverts or bridges must be provided to maintain the natural hydrology of the system as well as prevent constriction of the floodway that may result in aggradation, degradation or significant changes in hydrology of streams or wetlands; 9. That appropriate sediment and erosion control practices which equal or exceed those outlined in the most recent version of the "North Carolina Sediment and Erosion Control Planning and Design Manual" or the "North Carolina Surface Niining Manual" whichever is more appropriate (available from the Division of Land Resources (DLR) in the DBl\TP? Regional or Central Offices) shall be in full compliance with all specifications governing the proper design, installation and operation and maintenance of such Best Management Practices in order to assure compliance with the appropriate turbidity water quality standard: 10. All sediment and erosion control measures placed in wetlands and waters shall be removed and the original grade restored within two months after the Division of Land Resources has released the project, 11. That additional site-specific conditions may be added to projects proposed under this Certification in order to ensure compliance with all applicable water quality and effluent standards; 12. Measures shall be taken to prevent live or fresh concrete from coning into contact with waters of the state until the concrete has hardened; 13. If an environmental document is required, this Certification is not valid until a Finding of No Significant Impact (FONSI) or Record of Decision (ROD) is issued by the State Clearinghouse; 14: If this Certification is used-to access building sites, all lots owned by the applicant must be buildable without additional fill beyond that explicitly allowed under other General Certifications. The applicant is required to provide evidence that the lots are buildable without 24 requiring additional impacts to wetlands, waters or buffers if required to do so in writing by DWQ. For road construction purposes, this Certification shall only be utilized from natural high ground to natural high bound; 15. Deed notifications or similar mechanisms shall be placed on all lots with remaining jurisdictional wetlands and waters or areas within 50 feet of all streams and ponds. These mechanisms shall be put in place within 30 days of the date of issuance of the 401 Certification letter or the issuance of the 404 Permit (whichever is later). A sample deed notification format can be downloaded from the 401/Wetlands Unit web site at http://h2o.enr.state.ne.us/nowetlands. DWQ shall be sent copies of all deed restrictions applied to these lots; 16. 'When written concurrence is required, the applicant is required to use the most recent version of the Certification of Completion form to notify DWQ when all work included in the 401 Certification has been completed; 17. Concurrence from DWQ that this Certification applies to an individual project shall expire three years from the date of the cover letter from DWQ or on the same day as the expiration date of the corresponding Nationwide Permit 39, whichever is sooner. NORTH CAROLINA DIVISION OF COAS'T'AL, MANAGEMENT STATE CONSISTENCY Consistent. Citations : 2002 Nationwide Permits - Federal Register Notice 15 Jan 2002 2002 Nationwide Permits Corrections - Federal Register Notice 13 Feb 2002 2002 Regional Conditions - Authorized 17 May 2002 2 = IL .1? r . '1 rvuonaei r. ta9lay, Governor William fl. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klime};, p,E. Dire-tor Division ofwater Quality Mr. 13111 Gartland Crosland Land Company 141 Scaleybarfc Road Charlotte, NC, 28209 wULKS/401 GROUT May 6, 2005 DtnlQ? W3-006D Mecklenburg Country J U L a ;y APPROVAL of 40, Water Quallity Certification with Additional Conclitions??AQUAIITY%C 110N Dear Mr. Gartland: You have our approval, in accordance with the attached condldons, to place permanent fill In 0,47 acre of wetlands and up to 145 linear feet of perennial streams in order to construct a residential subdivision on the Threatt/Beever/Mattis tract in Mecklenburg County, as described in your revised application received by the Division of Water Quality on April 1, 2003, After reviewing your application, we have determined that this fill is covered by General W ater Quallty Cartificatton Number 3402, which can be viewed on our web site at httnJ/h2o.enr.state nc us/nowetlands. This Certification allows you to use Nationwide Permit Number 39 wnen it Is Issued by the J.S. Army Corps of Engineers. In addition, you should get any other federal, state or local permlts before you go ahead with your project including (but not limited to) Sediment and Erasion Control, Non-Discharge and Water Supply Watershed regulations. Also this approva! will expire when the accompanying 404 permit expires unless otherwise specified In the General Certification. This Certification repiaceo the one issued to you on March 14, 2003. Thle approve; is Only valid for the purpose and design that you described In your appflcatlon. If ,you change your project, you must notify us in writing and you may be required to send us e; new application for a new certification, If the property is sold, the new owner must be given a copy of the Certification and approval letter and is thereby responsible for complying with all conditions. If total wetiand fills for this project (now or In the future) exceed one acre, compensatory mitigation may be required as described In 15A NCAC 21-11-,0505 (h). For this approval to be valid, VOL must follow the conditions listed in the attached certlfication, as well as the additional condition listed below: 1. Deed notifications or similar mechanisms shall lee placed on all Iota with remaining ,iudedfctional wetlands and waters or areas within 50 iedf of all streams Ono ponds on the property. These mechanisms shall be put in place within 30 days of the date o`: this. latter o- the issuance of the 404 . Permit (whichever is later). A sample gee; notification format can be downloaded from the 401/het ends 'wtnl vreb site at nttz~: n2o.en? state n^ us n^wetie ; 2. An additional condition is that a final, written stormwater management plan shall bH aoproved In writing by this Office before the impacts specified in this 'ertlf;cation occu The €tormwater, management plar, must include; plans and apecltications for diffuse flow- of all stormwater through existing buffers based on the Level Spreader Design guidance at httpL//h2o.ohnr.state.nc.us/ncwotlandshevel.pd;. These facilities must be designed to treat the runoff from the entire project, unless otherwise expJleltly approved by the Division of Water Quality. Also, befam any permanent building is occupied at the subject alts, the facliltles (as approved by this Office) shall be constructed and operational, and the stormwater management plan (as approved by thit Office) shall be Implemented. The structural stormwater vraoiices as approved by this Office as well as drainage pattems must be maintained In perpetulhi. No changes to the srruciura! stormwater practices shall be made without written authonzation frorr the Division of Water Qualm,; 3. 'YOU are required to return the attached Gertlfication of Completion: form to notify DWQ when all wort included in the 401 Certification has been completed. If you do not accept any of the conditions of this certification, you may ask for an adjudloatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 1508 of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mall Service Center, Raleloh, N.C. 27699-6714. This certlfication and Its conditions are final and binding unless you ask for a hearing, . This fetter completes. thp review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone Mike Parker in our Mooresville 99glonal Office at 7D4-863-1699 or Cyndl Karoly In the Central Office In Raleigh .919-733-9 721. ?l I,/ )Alan W. Kllmek. P.-m, NI. C. Dlv16lon of VVater Quallty, 1517 Mall Service; enter Fialeipr:, tdC 2?6gp ;E1? (9;E, 7„_.7p'S anti T !T']_' : um1 Customs- Seryinc 7Pd171- TIH _'Fi: -i L rt' lm?t?am Q. Roos Jr„ Secretary North Carolina Departmem of Environment and Nataral ReaoUroae Alan W, Klimek, F.E., Director .? .? Dhrislon 011 V1 Ater Quallt}, ,D T FIO1C?t I` G.: . O'u"1L?': Applicant: Project hsmc: Date of Issua=5 ef 401 Wamp Qua ity C=?cation: certmcate of Complatinkl Upoti cohipletion of all wort: approved within the 401 Wator Quality Cerdfioation and Bt ffex Mos, and . an,' subse'quant modifiostionm, the apnlioent is required to setu_-z this cert?ficace to the 4t1 lWetlandF Unit, Noztb. Caroling Division of Water Quality, 1621 Mail Service Centex, kaioigtt, NC, Z769R-162? . This. to= may be returned to DVdQ by the-applicant, the applicant's authorized agent, or the project engines:. It is not necessary to send oatincat% from all of those. Applicarrtss CerAftcation hereby state that, to the boot of =Ly abilities, duo carp and diL'genoe was used m tine observation of the conmuction -such that the construction was observed th be built within substantial conmliance'and. intent of the.4al Water Quality Certmoatdon anal Buffer Rules, the approved plans and specifications, and other supporting mattddls. Si?tatt?: Agvn.r".- Cerr atlox Date. , i, aemby state thz:x to the best of na - abilities. due: ^.. 'e and diligeuct: was uses iZ the ommrvat ion .mr the constn:otion suck that the construction war- observed to. be baU± witliil. substantial coa?iiasticesac•?;ntaat o: zae40= F?at":.;??=?- ?.° '?`„atior<•aadBtt?`?? r.?i?; •du.?ptlz'ov?i•?_ isas•aue•-cpe.?icatibnt:;•,.. and othe- sutwo_-tittg mat.=1e: _ _ ....:..: _.. _ - ?i,?uat:tarc: Zf trt: pmice ryas "sieraed k - Cmrtf i i Professional Date. j: as a duly repdst and Professional (:.e., nginoe*, mdscape Arenttect, Su_r•vAyo:, ea .) in the State of North Carolina. havin€ Green authorized to obm-Ve (periodicaLly., weehy, full tame) the construction of the project, fo*-thr, Pmt2tm hereby state that, to the best of my abilities, dut; care and diI.igence, was used in the obser=vation of the construction such that the, eonstmetign was observed•io b6 bunt with substantial. wompliance and intent o? 'tie 401 mater Quaiit? Certification and Buffer Ftiulec, the approved piszle and specifications, and other supporting meterlals, Signature: Rkelstration No, N'. C. Dvlslon e,, Water Duality, 404, wettanda Certlfloatior Unh, t®bt) Mail 8orvibe Cents, Raleigh, NO 278861850 (Malling Adorm) 2^321 Crabtree Blvd., ftaielph, NC 27304-2280 {Looailonj (PIP) 735-1766 (phone), 919-73$-88X- (fm) (httcJlr,2o.artr.atara.nc,uslncwe+JandE Date RM '- T T = T'om'e William G. Ross Jr., Secretary North Carolina Departmen*, o' Environment and Natural Resources y • a Alan VU. Klimek, P.E., Director Division of water ouality 2003, in accordance with Titie IS NC .AC 2 0506 the f-1-4 DEEM -Teyr ?I subdivision, lot rag IFI".ATIiEBR shall be recorded in the _ County Registry prior to the conveyance of lots. Said Deed Notification shall apply to name of numbers in County, North Carolina as shown on pietas titled (insert subdivision name) prepared by (insert name of designer) dated date: "A portion of this lot has been determined to meei the requirements for designation a,, a wetland, stream or protected stream buffer, Any subsequent fill or alteration of this area shall conform to the requirements of the state rules adopted by the State of North Carolina in force at the tirnt of the proposed alteration. The intent of this movision is to prevent additional wetland, stream or buffer filling or draining, so the property, owner should not assume that 'a future application for filling or -draininrwoiad be approved. The property owner shall repott 'tEo name bflhe subdivision in. any application pertaining fo said rules. This covenant is intended to ensure continued compliance with all rules adopted by the State of North Carolina and therefore the State of North Carolina may enforce benefits. This coven= is to run with the land and shall be binding on all Parties and ali persons claiming under them". Signature Crvrner's name: Address: Wiry. Smtc, -it, Code: anon:: Number: STATE Or NORTH C.??tQ?ING. CO=Y 1. a Noian, Public oftht State afNorth Carolina, County, hereby certify that owner personally- appeared before me this day and executed by above certification. Witness my hand and notarial sea!, this day of 2003 Nature Public l?iv coinmissior_ expires: AM. h C. Division cf Water Quality. 401 Wetlands Certincatior Unit, 'E50 Mal! Service Center, Raleicti, NC 2768E-'650 (NialllnrAddress> 2321 Crabtree Blvd., Raielph, NC 2760-1-2260 (Locatior 733-1780" (phone;, 81?-733-6883 (fax), (http://Y,2o.enr.siate.no.usincvdetlands °4 00 ,?344? This General Certification is issued in conformity with the requirements of Section 401, Public Laws 92-500 and 95-217 of the United States and subject to the North Carolina Division of Water Quality (DWQ) Regulations Jr, 15A NCAC 2H, Section .0500 and I BA NCAC 2S .0200 for the discharge of fill material to waters and adjacent wetland areas or to wetland areas that are not a part of the surface tributary system to interstate waters or navigable waters of the United States (i.e., isolated wetlands) as described In 33 CFR 330 Appendix A (S) (18, 39, 41, 42, 43 and 44) of the Corps of Engineers regulstlons (i.e., Natlonwida Permit No. 3s) and for the Filparlan Area Protection Rules (Buffer Rules) in It 5A NCAC 2S .0200. This Certification replaces Water Quality Certification Numbers 3106 and 3106 issued on February 11, 1997, and Water Quallty Certification Number 3287 Issued on June 1, 2000 and Water Quality,,'-' ertification Number 3362 issued March 18, 2002- This WOO is rescinded when the Corps of Engineers re-authorizes Nationwide Permits 18, 39 4' , 42, 43 or 44 or when deemed. appropriate„ by the Director of The State of North Carolina certifies that the specified category. of activity will not violate applicable portions of Sections 301, 302, 303, 306 and 307 of the Public Laws 92-500 and 95-217 if conducted in accordance with the conditions hereinafter set forth. Conditions of Certification: 1. Enumerating and Reporting of Impacts: Streams - Impacts to streams as determined by the Division of Water Quality shall be measured as length of the centerline of the. normal fiat channel. Permanent and/or temporan' stream imparts shall be enumerated or the entire palest for all impacts regardless of which 404, Nationwide Permits are used. Stream relocations and stream bed and/or bank hardening are considered to be permanent stream Impacts. Any activity th&t results in a loss of use of stream functions Including but not limit®d to filling, relooatiog, flooding, excavation, dredgin and comaiete shading shall be considered stream impacts. enumeration of impacts to streams shall Include strearns enclosed by bottomless culverts, bottomless arches or other spanning structures when a 404 Permit Is used anywhere In a project unless the entire structure (including construction impacts) spans the entire bed and both banks of the stream, is only used for a road, driveway or path crossing, and is not mitered to follow the stream pattern. Impacts for dam footprints and flooding will count toward the threshold for stream impacts, but flooding upstream of the dam will not (as long as no filling, excavation, relocation or other modification of the exlsting stream dimension, pattern or profile occurs) count towards mitigation requirements. Any filling, excavation, relocation or other modification of the existing stream (other than flooding) must re-establish the same dimensions, patterns and profiles of the existing channel (or those of a stable reference reach if the existing channel is unstable) to the maximum extent practical. 6 Wetlands - Impacts to wetlands as determined by the Division of Water Quality shall be measured as area. Permanent and or temporary wetland Impacts shall be enumerated on the entire project for all impacts regardless of which 404• Nationwide Permits are used, Any activity that results In a loss of use of wetland functions including but not limited to filling, excavating, draining, and flooding shall be considered wetland impacts: Enumeration of-imoacts to wetlands shall include activities that change the hydrology of 'a wetland when 404 Permit is used snywhers in a project. T k41oc? Lakes and Ponds - impacts to waters other than streams and wetlands as determined bv the Division of Water Quality shall be measured as area. Permanent and/or temporary water impacts shall be enumerated on the entire project for all impacts proposed regardless of which 404 Nationwide Permits are used. Any activity that results, in a loss of use of aquatic functions including but not limited to filling and dredging shall be considered. waters impacts, Application Thresholds - Stream; wetland and water impacts that exceed any of the thresholds below require a camplets application and written concurrence to use this Certification: & Total stream impacts of greater or equal to 150 cumulative feet of stream length for the entire•project require written notification to and approval by the Division of Water Quality, and/or o Impacts to waters of equal to or greater than 1/3 of an acre require written notification to and approval by the Division of water ouallty, and/or c Wetland Impacts of greater or equal to 1/3 of an acre east of 1-95 and 1/10 of an acre west of 1-05 require written notification to and approval by the Division of Water Quality except as specified below. Any impacts to wetlands adjacent to waters designated as ORW, SA, WS-1, WS-II or Trout or are designated as a North Carolina - "_._- -._... _, ot_N•ational Wlid and Scenic River and wetlands.classified as SWL and/or UWL as well as wetlands described in 15A NCAC 2H .0508 (e) require a complete application and written concurrence from the Division, of Water Quality to use this Certification. These thresholds apply for the entire project regardless of the number of Nationwide Permits applicable to the Certification that are Issued by the USACE for the project; 10 Written notification to DWQ Is required for all applications that propose to use Nationwide Permit 18. 7 his notification requirement will be satisfied by providing two (2) copies of the PON form to DWQ at the same time that the PCN form is sent to the US Army Corps of Engineers. A formal application and fee is not required unless DWQ decides that an individual Certlflcatlon wlI! be required for the project, In this- cass, the appllcant will be notified it +r,,ritinc from DWQ within 30 days of the receipt of thc, --?t-:en notification. Proposed fill or substantial modification ot•anv arnount of wetlands ciass.lfled In accordance with.15A NCAC 2S .0101(e)(7) as Unique Wetlands (UWL) shali require written concurrence from the Division of Water Ouallty; impacts to any stream length In the Neuse, Tar-Pamlico or Randleman River Basins (or any other major river basins with Riparian Area Protection Rules [Buffer Rules) in efiect at the time of application) requires written concurrence for this Certification from DWQ In accordance with 15A NCAC 2B.0200. Activities listed as "exemn"' from these rules do not need to apply for written concurrence under this Certiflcation. New development activities located In the protected 5D-100t wide rioarian areas (whether lurisdictional wetlands or not) within the Neuse and Tar-Pamlico River Basins shall be limited to "uses" identified within and constructed In accordance with 15A NCAC 2B .0200. Ali new development shall be located, designed, constructed, and maintained to have minimal disturbance to protect water quality to the maximum extent practicable through the use of best management practices; 3. Irrespective of other application thresholds in this General Certification, all Impacts to perennial waters and their associated buffers require written approval from DWQ, since such impacts are allowable as provided in 15A NCAC 26. 0212 (WS-1), 2E .0213 (WS-II), 7E .0214-(WS-111) and 2B .0215 (WS-IV). Only water dependent activities, public projects and structures with diminimus increases in impervious surfaces will be allowed as outlined -. In those-rules.- -All other activities require a variance from the delegated local government and/or the NC Environmental Management Commission before the 401 Water Ouality Certification cat-, be processed, in addition;, a 30 toot wide vegetative buffer to- low density development or a 1 CC) loot wide vegetative butter tar high density development TS WQ #340.2 must be maintained adlacent to all perennial waters except for allowances as provided under the Water Supoly Watershed Drotection Rules, For the purposes of thls condition, perennial waters are defined as those shown as perennial waters on the most recent USES 1:24,000 topographic map or as otherwise determined by local government studies; 4. Additlonal site-specific stormwater management requirements may be added to this Certification at DWO's discretion on a case by case basis for projects that have or are anticipated to have impervious cover of greater than 30 peroent. Site-specific stormwater management shall be designed to remove 95% TSS according to the latest version of DWG's Stormwater Best Management Practices manual at a minimum. Additionally, in watersheds within one mile and draining to 303(4) listed waters, as well as watersheds that are classifled as nutrient sensitive waters (NSW), water supply waters (WS), trout waters t i r), high quality waters (HOW), and outstanding resourco waters (CRW), the Division shall require that extended detention wetlands, bio-retention areas, and ponds followed by forested filter strips (designed according to latest version of the NC IDENR Stormwater Hest Management Practices Manual) be constructed as part of the stormwater management plan when a site-speclfic stormwater management plan Is required, For streams classified as Water Supply, High Quality Waters and Outstanding Resource Waters, post-construction, on-site stormwater management shall be required as appropriate and as outlined in 15A NCf+G 2E .0104(m) and 2H .1000 to .1007, respectively, In addition to that required in this General Certification. Alternative designs may be requested by the applicant and will be reviewed on a case-by- case basis by the Division of Water Quality. kpprovaf of stormwater management plans by the Division o-, Wets- Duality's other existing state stormwater nrograms Including appropriate, local programs are sufficient to satisfy this Condition as long as the stormwater management plans meet or exceed the design requirements spec?f ied in this condition. This condition aooiies unless more ctrinpent requirement:. are in effect trom other stats water auallt? programs, Unless specified otherwise in the approval letter, the final, written stormwater management plan shall be approved in wrlting by the Division of Water Quality's Wetlands Unit before the impacts specified In this Certification occur. The facilities must be designed to treat the runoff from the entire pro)act, unless otherwise explicitly approved by the Division of Water Quality, Also,. before any permanent building or othsr structure is occupied at the subject site, the tacilltles (as approved by the Wetlands Unit) shall be constructed and operational, and the stormwater management pier) (as approveo by the Wetlands Unit) shall be Implemented. b The structural stormwater practices as approved by the Wetlands Unit as well as drainage patterns must: be maintained in perpetuity. No changes to the structural stormwater practices shall be made without written authorization from the, Division of Water Quality. 5. Compensatory stream rnltlgatlon-shall be required at a 1:1 ratio for not only perennial but also Intermittent stream impacts that require application to DWQ in watersheds classified as CRW, HOW, Tr, WS-1 and WS-II unless the project is a linear, publicly-funded - transportation-profact;.which has-a1 K-foot per-stream impact allowance; - 6. In accordance with North Carolina Cenerai Statute Section 11 43-215.3D(e), any applicatlon for a 401 Water Quality Certification mus' include the appropriate fee. If, a is=I i project also requires e .AMA Permit, orae paymem to both agencies shalt be submitted gnu will be the higher c tne, two gees, ' 7. In accordance with 15A NCAC 21-{ .0506 (h) compensatory mitigation may be required for impacts to 1, 50 linear feet of more of streams and/or one acre or more of wetlands for an entire project, For liner public transportation projects, impacts equal to or exceeding 150 feat per stream may require mitigation. In addition, buffer mitigation may be required for any-project with Riparian Aroa Protection Rules (Buffer Rules) In effect at the time of application for buff impacts resulting from activities classified as "allowable with mitigation" within the "Table of Uses" section of the Buffer Rules or require a variance under the Buffer Rules. A d(termination of buffer, wetland and stream mitigation requirements shall be made f)r any Certification for this Nationwide Permit. The most current design and monitoring protocols from DWQ shall be followed and written plans submitted for DWQ approval as required In those protocols. When compensatory mitigation is required for a project, the rt lfipatlon plans must be approved by DWQ In writing before the impacts approved by the Certification occur, unless otherwise specffled in the approval letter. The mitigation plan must be implemented and/or constructed before any permanent building or structure on aite Is occupied. In the case of public road projects, the mitigation plan must be 1rho'lemenied before the road is opened to the travelling public. Please note that If a stfoam relocation is conducted as a stream restoration as defined in The Internal 7d::hnical Guide for Stream Wort- in North Carolina , April 2001, the restored length can be used as compensatory mitigation for the impacts resulting from the relocation; i 5. For any project involving re-allgnmont oft streams, a stream relocation plan must be included with the 401 application for writen DWQ approval. Relocated stream designs should include the same dimensions, papems and profiles as the existing channel (or-a. stable reference reach if the existing channel is unstable), to the maximum extent practical. The new channel should be constructed In the dry and water shall not be turned into the new channel untl! the banks areistabiiized. Vegetation used for bank stabilization shall be limited t^ native woody specles,sanci should include establishment of a 30 toot wice wooded and an adiacen*. 20 toot wide vegetated buffer on both sides of the, relocated channel to the maximum extent practical;. A transitional phase incorporating coir fiber and seeftric, establishment is allowaoie, Alsb, rlp-rap, A.-Jacks, :.oncrete, gablons or other hard structures may be allowed if it is necessary to maintain the physical integrity of the stream, but the applicant must provide written justification and any calculations used to determine the extent of rip-rap coverage ;requested. If suitable stream mitigation Is not practical on-site, then stream impact will !need to be mitigated elsewhere. Please note that if a stream relocation is conducted as a stream restoration as defined in The Internal Teohnlca; Gulve forSrream Work, in Noah Carolina , April 2001, the restored length can be used as compensator, mitigation for the impacts resulting from the relocation; Placement of culverts and other structures in waters, streams; and wetlands must be placed below the elevation or the streambed to allow low flow passage of water and aquatic life unless.it can be shown to DWO that providing passage would be impractical. Design and placement of culverts including open bottom or bottomless arch culverts and other structures including temporary erosion control measures shall not be conducted In a manner that may.result in aggradation, degradation or significant changes In hydrology of wetlands or stream beds or banks, ad lac,, ?nt to or upstream and down stream of the above structures. The applicant is required to ptpvlde evidence that the equlilbrium shall be maintained If requested to do so in writing by DWQ. Additionally, when roadways, causeways or other fill projects are constructed across FEMA-designated floodways or wetlands, dpeninpg5 such as.culverts,.pr„brdQes, must be provided to maintain the natural hydrology of the system as well as prevent constriction of the fioodway thaf may result In aggradation, degradation or significant changes In hydroiogy of streams or wetlands; t=,r._i '.:? iT : _ T _i_i1.17 rril T TS?'?t%1-1 I : X. WQG #%3X02 10 I U. That appropriate sediment and erosion control practices which eauaf or exceed thoss outlined Jr. the most re. e nn' versiai jj of they "No"I th C:arolina Sledlrnanl and erosion Contro! Planning, and Design Manual" or the "North Carolina Surface Mining Manual" whichever is more appropriate (available from the Division of Land Resources (DLR) in the DEENR Regional or Central Offices) shall be In full compliance with all specifications governing the proper design, Installation and operation and maintenance of such Best Management Practices In order to assure compllance with the appropriate turbidity water quality standard; 1 1. All sediment and erosion control measures placed in wetlands and waters shall be removed and the original grade restored within two months after the Division of Land Resources has released the project; 12. That additional site specific conditions may be added to projects proposed under this Cortlfloatlon In order to ensure oomplianoo with all applloable water quality and effluent standards; 13. Measures shall be taken to prevent live or fresh concrete from coming Into contact with waters of the state until the concrete has hardened; 14" if an eh-Vironmerital document Is required, this Certification is not valid until a f=inding of No Significant impact (FONSi) or Record of Decision (ROD) Is Issued by the State Clearinghouse; 15, If this Certification is used to access building sites, all lots owned by the applicant must be buildable without additional fill beyond that explicitly allowed under other General Certifications. The applicant is required to provide evidence that the lots are buildable without requiring additional impacts to wetlands, waters or buffers If required to do so in writing by DWQ. For road construction purposes, this Certification shall only be utilized from natural high around to nst?!rs' hich arc;;.,^:^: 1E. Deed notifications or similar mechanisms shall be pizced cn all lots with remaining jurisdictionai wetlands and waters or areas within 50 teet of all streams and ponds. These mechanisms shall be put in place within 30 days of the dat of Issuance of the 401 Certification letter o; the issuance of the 404 Permit (whichever Is later). A sample deed notification format can be downloaded tram the 40i/Wetlands Unit web site at htto:/fh2o.enr.state.nc.us/ncwetiands . DWQ shall be sent copies of all deed restrictions applied to these lots; 17, When written concurrence is required, the applicant Is required to use the most repent version of the Certification of Completion form to notify DWO when all work Included in the 401 Certification has been completed; IS. Concurrence from DWO that this Certification applies to an individual project shalt expire three years from the date of the cover letter from DWQ or or, the same day as the expiration date of the corresponding Nationwide Permit 18, 39, 41, 42, 43 or 44, whichever is sooner. '-IT :? CiT : T Al0C #3402 Non-compliance with or violatlon.ef the conditions herein set forth by a soecific fill broad may result in revocation of this ".ertifi-_ation for th£a projec, and may also result it criminal anchor clVll penalties. The Director of the Nnrth Carolina Division of Water Quality may require submission of a formal application for individual Certification for any proiect in this category of activity that raqulres written concurrence under this certification, if it is determined that the project Is likely to have a significant adverse effect upon water quality or degrade the waters so that existing uses of the wetland or downstream waters are precluded. Public hearings may be held for specific appiications or group of applications prior to a Certification decision If deemed in the public's best interest by the Director of the North Carolina Division of Water Quality, Effective dater March 2003 DIVISION OF WATER QUALITY B1/- Alan W. Klimek., P.E. Director WQQ _::4J_2 TT -d 7T: I- T _i=ii_i, <{ ri i1 T ,T'? -?bCi- ?Tt i Michael F. Easley Governor William G. Ross, Jr., Secretary Department of Environment and Natural Resources Kerr T. Stevens Division of Water Quality Draft Level Spreader Design Options Version 1.0 October 10, 2001 Using Level Spreaders to Provide Diffuse Flow Through Buffers for Compliance with Riparian Area Protection Rules Level spreaders are one means of providing diffuse flow through protected buffers. It is always preferable to not concentrate stormwater initially and provide as many outfalls as possible. This can reduce or even eliminate the need for engineered devices to provide diffuse flow. However, this is not feasible in many cases. Some buffer protection rules such as the Neuse, Catawba, and Tar-Pamlico Riparian Area Protection Rules do not allow direct discharges of stormwater through the protected buffers. However, it is "allowable" with written approval from the DWQ to provide best management practices (BMPs) that remove the nutrients or pollutants in question in order to discharge directly through the buffer. These measures could include the use of the buffer itself as a forested filter strip, for instance, to remove the desired substances. In addition to providing diffuse flow, level spreaders can be used to distribute flow into filter strips. There are certain criteria that apply to every design that utilizes level spreaders to provide diffuse flow: 1) The entire system must safely pass a 10 year storm event without failing or causing erosion, gullies or rills. 2) The design of the level spreader must take into consideration site specific conditions such as topography, vegetative cover, soil and other geologic conditions. If diffused flow is not attainable based on site conditions they should not be used. (i.e. the slope of the natural ground away from or parallel to the level spreader should be relatively smooth in the direction toward the stream so that the flow will not reconcentrate.) 3) Level spreaders should have a minimum length of ten feet and an absolute, maximum length of 300 feet. 4) It is always easier to keep flow distributed than to redistribute it after collection. 5) The type and amount of vegetative ground cover must also be considered. 6) Level spreaders must be level. Level Spreader Design Options: Conventional level spreader design option where entire discharge is passed through the level spreader with no bypass conveyance for larger storms: • For grass or thick ground cover vegetation: i)13 feet of level spreader for every 1 cfs flow (Based on Q10 discharge) ii) maximum length of 300 feet per level spreader iii) Slopes of 8% or less from level spreader to top of stream bank • For forested areas with little or no ground cover vegetation: i) 100 feet of level spreader for every 1 cfs flow (Based on Q10 discharge) ii) maximum length of 300 feet per level spreader iii) slopes of 6% or less from level spreader to top of stream bank Another conventional level spreader design technique that can be used to accommodate steeper slopes where grading is allowed or exempt in zone 2 of protected buffers is to provide level spreaders in series as follows: • Can be used on slopes of up to 15% for forested areas and 25% for grass or thick ground cover • Structural level spreader just outside of zone 2 followed by a grassed berm level spreader just outside of zone 1 North Carolina Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address) 2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location) 919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/ Page 2 of 2 • Maximum Q10 discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover In some instances, because of topography, the size and imperviousness of the drainage area, or other site constraints, conventional level spreader designs are not appropriate. However, there are alternative designs, like the ones listed below, that would allow a level spreader to function properly by bypassing the larger discharge events. This is based on the assumption used in designing most water quality BMPs that the "first flush" of stormwater discharge contains the most substances of concern. These other alternatives are "allowable (require written approval from DWQ)" for protected buffers in the Neuse, Tar-Pamlico and Catawba basins, but would not be allowable in protected buffers of the Randleman watershed. Level spreader with bypass for larger drainage areas that require 85% TSS removal or where lateral constraints limit the level spreader length severely: • Dry detention basin designed per NCDENR Stormwater BMP Manual* sized to detain 1" rain and release it over 2-5 days* through a level spreader. • Level spreader length based on the maximum release rate discharge • Discharges from greater than a 1" rain can be bypassed via an appropriate conveyance such as a grassed swale (rip rap lined ditch or pipe may be used if necessary) • Maximum discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover *( in order to meet 85% TSS Removal criteria) Another bypass alternative can be used that would not be considered to remove 85% TSS: • Detention basin such as a type B silt basin preceding the level spreader • Level spreader length based on the 1" per hour intensity storm • A system designed to bypass the areater than 1" in per hour intensity storm through an appropriate conveyance such as a grassed swale (rip rap lined ditch or pipe may be used if necessary) • Maximum discharge of 1 cfs per 100 feet of level spreader for forested areas and 1 cfs per 13 feet of level spreader for grass or thick ground cover Yet another design that can be used in very specific areas with virtually flat slopes is a Preformed Scour Hole with a Level Spreader Apron (typical detail attached): • Discharge area must have virtually flat slopes such as those in flood plains or wetlands • Must be located outside of zone 2 • B = 3 x discharge pipe size for pipes of either 15 or 18 inches B= base width (see detail) • Maximum allowable discharge (Q10) of 6 cfs for a 15 inch pipe and 10 cfs for an 18 inch pipe • Minimum apron width of 4 feet. Any of the above options will be considered acceptable if designed in accordance with the outlined criteria. Please keep in mind that some of the above practices may still require written approval, for instance when a direct bypass discharge is proposed through a protected buffer in the Neuse or Tar-Pamlico River Basin. i Il ? 1 CJ C7 '' ?.f T k? ? a n m tt v 1? T ? Y^ E rT^' Cl d- ?tEL ,moo 0 ri -- i,.::" T? r / 6 a 4 • SA cv? 1 n rl i A Y1! i ? ' MT f X P, C, 1 fl'i r.; t? tiC? ? L gyp. ftft140 'Jut 90(Ip )°(STORM DRAINAGE CALCULATIO YLINECr SON FOR THREATT/MATTIS SUBDIVISION Prepared for: Threatt Val Lane, LLC 141 Scaleybark Road Charlotte, NC 28209 (704) 522-9200 Prepared by: ESP ASSOCIATES, P.A. 10915 Southern Loop Boulevard Pineville, NC 28134 (704) 561-5319 Proiect No. RB26 Date: June 05, 2003 L f ?J 03 ESP Associates, P.A. engineering - sure 'ving - planning N (L] CD 1 O N W 00 0o W W W co 00 CD 00 M CO W CO OJ M 07 W co co m z o it it u it :m u u 4t :m 4t 4t 4t * -q -n m W S W W W W W N N N N N N:? --O O ?J O Ul w N D Ut D A W N -? O CO --J CT A N A W N O r 0 v z -+ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 z z w O A U1 A W N ?l Ul Cl) i i N? W N O? N W W W CD (D (D -4 D W D) A N W v i W i w O A M W - N CD UW i W -J O O Oo m o ?^ N p i i --? O O 7- i O O O O --? O O O i 0 0 i O N N N i (a7 V) Z C N W --? (D M-4 N v N W .41 ?J CO Cn O-4 ti OD -9?. v W --oo C C O; N O O UW -• (n O N to O -? 00 w m Ut N W O A m co W O 0) -4 W < -n y n O m ' O -+ -+ i 0 -? -• -+ O O O O i 0 0 0 --? i i i i N N N --` O A U, W -a (D O -J N -J N W .A -J M Cn O ?J O v v 0 i i OD .J (D UW CJW i O CD N CD D) i W W O UW N O A CD M W -J CA O v 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 r m = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 i 0 O m i i i i I f n i i N N N W w w M M O O N W W W w O m Oo C) N m T C O O O i i i O O O O O O -+ --? --? i m ' ?Z vm 00 v 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 3 m m W W 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 w w w w w w w w w w w w w w w w w w w w w w w cw s M i i w w w w w w w w w w w W w w w w w w w w w w w w to m 0 T 0 0 N N N N N N N N N N N N N N N N c p O O W W W W W OD O O O O O p p W W x CD 0 0 0 0 0 0 0 0 UW Ut 0 0 0 0 0 0 0 0 O O O O O O O O 00 O O O O O O o O F ' O 3 f? yyyyyy??? fi W --? N O co O A E".. 1. .L? i OD O O A O C37 () r O m CD O O (D CJt O A A 2 i' N v O O CO v A i W N O A M UJ U .P A O CJ1 O W W N U1 W N i O CJW Ln O (J? -4 O (A 0) m W N M CD i v OD O N -? W Ut .F OD M (JW W .A N M O (O N CJW m O m v W W i UW - co v rn -+ -? N W i CO -J O A -J W M CO A i W W vD N_ CQ 7 W A C (CD 0 0 0 0 0 0 0 0 O O O O O O O O O O O O O O O O <; N O O --? O O O W C) ' O O O O O O O O O i w w m U) O O A D C @ O (O O O O o m co O O 0 0 0 0 0 0 (n -? UW N W A O o > d a N 0 co co wpp co C 07 07 co m m co m w m w m W m m 0o W 0 co -n 0 - rn Ul Ul N N W+ O N N N N W N N O N O (O Cp --A 0 r w D OD 0) w (? (n Cn Cn (n (? (n C) Cn CA w w to 0 w w w w w w w w Cn Cn -I -I -i -I -I C --I -I D D D D -I -I -I -i D D m D D D D D D D D r D D G7 D D D D D D D D - (D V -J UW W W co W N -? -? CO -J ?J Ui M D i + + + + + o + o + + + + + m w W co + M + N N o -J -4 + + + + t 6) 00 UJ A N .P CD .P OD W (D i i (n W W -J W w ?J w 0) CO Ln (O t Co OD CO N O O D A .A. O N N .P Co W i O -? -? i 0 C) i? A 0 N N A i -+ U7 O CC A -J Ul Ul CIW 01 Ul U, C O Z r n D ,D 2 N LU (LZ CD N O_ N 2 ;0 -0 n n n n W n n r a a, w co : 0o W it co W 01) W 00 00 07 m o z „ rn * M a * A w v T, n C - o CD D O D -4 o c o -4 rn r n > O z -i m 0 0 0 0 0 0 0 0 0 0 0 0 0 0 z chi in v, iv cn A w 0o iv o m z T -4 D. W ?I v CD O cn A CD N U1 Ul 00 D m o rn Cl) p ... O p -.. O .? N O O C C S C' L? -4 iv :p W -4 iv 0 w iD o A M -• CD M G s 0 o w A w -J O ? E D H 0 m ' O -? O --• O -? -• O N N O O O Q M V W A W -I IN O W -.• - - M -a O M M - -l O O M A W W O O Cfl D r m = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 r 0 "n c m -'' - -' - m m ? n w O w C) rn Ul rn cn rn Ul rn U1 a ) U7 rn Ul rn Ul cn o G7 f!l - C m m ? .? z 0m . ) p ( -? m m 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Z 0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 w r S z w W W W W W W W W W W w w W U) T G) x ! , 1 O -? C7 N N N N N N N N N N 3 D O O N N N N N N N s CD f'1 0 0 0 0 0 0 0 0 O ' I n m in w Cn 0 N 0 -l co --? O O W Ch O O CD W Ul w 111 .« 0 l O m N CD N N (A Ul W M A p Ui p U7 O O N N x x --q CJ7 .A Oo V1 U7 W W -• W N CJ1 A W E m p -• A W CP O W N -• O W Ut CD N N CD 8 N I Ito 7 X <D 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ,u 7 O W 8 O -? O -? 0 0 0 0 0 0 0 to D a CD O CD CD O -1 O O Ul O CD O O O O Cl) R p, U) n m n co c m co W IM 07 00 co c ? 11 cyl D (D ? Ul vi ccnn y CD 00 -4 D -4 -4 v . . Cf) C/) U) cn cf) Cl) cn U) Cl) Cl) L7 cl) cl) cf) D -I v v -I -I -1 -I -I -4 D D D -I m D D D D D D D D D G) G) G) D CTI U1 N N N +A A C+D C+D (D -? O C.D O) 01 . -• N N Oo A W Cl) N CD Cn U7 N A A C) 0 N CP W -? O w w - Ul 00 so SC ak® 3C 2Z Ic I! N. I i s !! { i I R ! I i 4 I i I i " i I I" NZj I .11 I({ I i I i I{ I! ? I? i ! 16 i I I L:L 2 6 114 I I I I ( i( i " I d p 1 ? ! I 1 { j j !{ i I i I ?. ( I I! I( i! ! °II( I ?! I4 ' I II e.(? ?!IIA h I ! 4 i! f i` V I I I i 9 I 4 y? E ? S 1? tl p Y ( t p ? h• 3 ^ I i ? •. d .? 1 3 Al I g I d I to it k 4 u r ? i I? ?` k, I x r `? s i? I( i E @@ TRANSVERSE GUTTER SLOPE Q L z L.ONGiTaUDMAL GUTTER SLOPE K o GRATE INLET COEFFICIENT Cd 19W N"nsh Ea WMY Co. Q KEEL" Where: Note D = depth of water in gutter, upstream from the grate (ft) Q =:discharge intercepted .by grate (cfs) For S,->6%., use the.curve:for S,-=6% Figure -5-1 Grate Inlet Coefficient - On Grade 5-12 depth TW is the distance in feet from the culvert invert at the outlet to the water surface in the outlet channel. The relationship of HW to the other terms in equation 3 is illustrated in figure 4. HW D Lso L H TW=ho Figure 4 If the.,tailwater.,elevation is below the t - the -culvert -open- in? at the outlet figure 2B, 2C and 2D? h?is_more difficult to_deter- mine? The discharge size and shape of culvert, and the TW must be considered. In these ses?._..hq is the greater of two values (1) TW depth as def inec above or c (?, 2 The latter dimension is the dis- tance to the eauivalent hydraulic grade line discussed previously. In this fraction d is the critical depth, as read from Charts 15 through 20 and D is the culvert height. The value of do can never exceed D, making the upper limit of this fraction equal to D. Where TW is the _ critical greater of these two values _ ? de,pto - is submerged sufficiently to make TW effective in increasing the headwater. The sketch in fig- ure 5 shows the terms of equation 3 for this low tailwater condition. Figure 5 is drawn similar to figure 2C, but a change in discharge can change the water surface profile to that of figure 2B or 2D. HW LSo r?- L Figure 5 H TW do +D 2 or TW =ho ?d 5-10 mil: ?.wV `f l? , ???? y ? r V l `?,'. '? .?-? t77 L? ?"?` „i • t-? ? ,Y".? ? 4C, 7(,' ?: rt= CHART 1 6 ° I I I I I I 1 r ? I I I I I ? 2 4. 4 3.5' I I , d? CANNOT EXCEED TOP OF PIPE 5 H w w >I 4 Lo) H - CL w s .5' 0L 0 6 l 9, 8 9' 7' dC CANNOT EXCEED TOP O PIPE DI A. I I ?? J Q C) 20 100 200 300 400 500 600 700 800 900 1000 U C M SCHARGE-O-CPS U U 14, 12 10 6 4 0 11' 3 ' DIA. 7 w 6 1U T 5 ~ n. U-1 0 Q P, CANNOT EXCEED TOP OF PIPE 1000 BUREAU OF PUBLIC ROADS JAN. 1964 2000 DISCHARGE-0 -CFS 3000 4000 u15c,MAKUt- V -'?rZ) 8 CRITICAL DEPTH CIRCULAR PIPE o Cl) 3 -u c > N Na0 CD O ? D O c Q N CL n? N m C/) -o m 1 N yn M CO N rn a) O cn O Z: d) .F?l cn .: F W A N z -? N O CO O D CY) - C37 -? Ui m -1 Cl) Cp C) CD _ C1 0 CD O 0 Z CD O CD =r CD N r?r N C* 0 CJ1 0 I I I I .'? v O W N O W W O W Cy1 O W N O U1 0 O ? .P O CA O o 11 O O V CJl O N -4 O CJl O 'M m O A O CJ1 O O ' m O CA 4 D n ... D m D CD <D O OD En CD C ? a- m ' = v c ' a T? Cl) r ^ w U1 Ul CJ1 U1 U1 U1 cn U1 U1 U1 U1 cn Cr w 00 v ?- C 3 c D ? co ° 0 '-? CD o O -? -? N N W W W -? N N N N N W Z Z O C3? ?I C37 CJ1 N O ?I W Co W N 61 P N C 0 CAI ? O C: cn O O O O O O O O O O O O O O O M 0 O .a .a I v _a _a IV N _a 0 O O Q T a W W W ?! C3) CD N w -? co co m ?I v m . z n C W r ? =n- n m ? = m v v cn cn v CD o? o O 0 O C) 0 O O 0 O 0 0 O 0 0 0 0 0 0 j 0 0 O 0 N O 0 O 0 0 -• 0 0 -? 0 0 -? 0 0 -? 0 0 0 o -? m O Z ? CD p y 3 D CD m CD sv If II O 17- (D (D CD T mW_ CD CD 0 0 0 0 0 o 0 o tV 0 N 0 0 s 0 0 0 0 0 D `y "O D O CD' o W W -P W -! M CD N w CD CD m -I v 00 a, CND CND W o C/) 3 -0 ° D c y cn a O ?CD N O c ? D O c v Q S -o v N m cn m 0' W co N C) W M -J O Cr -P W N -I cn O -h O CD CD 0 CD 0 ? O =r 0 O 0 M 0 .WA. 0 O 0 N 0 W 0 COO 0 O 0 N Z - n M D m a CD 3 W v = II II v CD CD K o co cn ? o j a = rn ' D cr v D -o ? m r a to r > o n _ CD c ? O w 0 0o '?I Cn ? ? o m w Z Z ? n CA -' N n ? O v ? m a =r 3 W 0 0 0 0 0 0 0 0 o n CD c O N O N O m Q Q M 4 ? W N W W 4 O O Z O n C W W ? r m v m CA U) „ n v -- ( v 0 -1 T o 0 O N 0 O 0 0 0 0 0 00 0 00 0 00 0 00 o O m 0 Z CD M o D CD " CD CD m v rn ;u n n O w v U) c v CAD CAD CD 0 0 0 0 0 0 0 0 .0 0 iv D v CD CD O P P W N W W O O .-. (n Cn CD CD W t ESP Associates, P.A. engineering • Y1111 017 pluanmg Culvert Design Report Threatt/Mattis Subdivision Bobhouse Drive at Sta 4+40.24, unnamed tributary of Flat Branch Recommended Structures: Aluminum structural plate Pipe-Arch, 9' span x 6.25' rise, 55 ft long Drainage area: 86 Ac. Allowable HW elev: HW/ D=1.2, ELEV=623.00 Manning's n: left overbank 0.100; Channel 0.040; right overbank 0.100 (obtained from field observations and design build-out condition) Design Data Hydrologic method: SCS / TR55 Design Q: Q2; = 214 cfs Additional analysis: Qioo = 287 cfs Design tailwater elev.: For Q:;, DA-618.10, For Qioo, Tw=618.20 Size and type: Aluminum. structural plate Pipe-Arch, 9' span x 6.25' rise, 55 ft long Invert elevations: In - 615.50, Out - 613.50 (Pipe will be constructed at existing channel grade.) Q Inlet control Outlet control k R Size and type emar s cfs Ke HW/D HW, ft dc d,+D /2 ho LS(, HW 214 1 70 0 619.90 2.90 4.6 618.10 617.10 inlet control 9's an x 6.25'rise, X25-,r p . ' i elev ; 2 0 elev governs Aluminum Pipe Arch 287 0.50 620.80 . 617.60 inlet control too-yr> 0.85 elev 3.20 4.7 618.20 elev governs Req'd outlet protection None. Natural stream flow line is maintained. Pipe is buried approx.1.0' to prevent scour. Prepared by P. Greg Garrett, PE Section ® - Inlet Control N Span Rise 69 21.6 x 12.11 65 ? 20.1 x 12-3 60 18.5 x 11.6 55 1 16.9 x 10.8 50 14-11 x 9.10 45 13.11 x 8.5 40 12-3 x 7-3 35 10.3 x 6.9 30 8-5 25 6.7 x 5-8 ALUMINUM PIPE-ARCH Rc = 3?e75 15000 10000 Entrance Type See page 4 5000 (3) (4) (5) 5 4000 EXAMPLE 5 3000 4 Size: 8.5 x 6.3 (N = 30) 4 4 2000 Q=31a HW' HW 3 D (feet) (3) 1.0 6.2 J S 1000 (4) 1.06 6.6 800 (5) 1.08 6.8 2 600 'D in feet 2 500 400 1 r z 200 ?AMp, E \ I U.1 M 1.0 - 100 8o I? /a; .9 1.0 1.0 60 9 9 50 - w .8 40 `n .8 Cr e 30 ?} wlru "??.7e1 .7 in 20 ¢ 7 7 U.1 H- .6 10 ?- 6 6 a w 7o use scale (2) or (3) project o horizontally to scale (1), then a: 5 use straight inclined line through D and Q scales, or reverse as Q illustrated. 5 .5 Q W H-- a --?1 .4 D I 4 r .4 Rc = 31.8 Duplication of this nomograph may distort scale 12 LL 11)11 1'J1. UU'U.l 1 VI1VI`Ir 2=0 ELL- 200 F 7 CJ f j 20 s i r< c?, i s c>a IL L CL W. < 64 66 Soo 4 - sx • ?' c 2 r ?nC` C d00 L CID ? 3 ? I ? ?? '=:i ! '"-'-'"T rl x7 J. L • a1j4,,.::, ? ?" n. S ZQii? vC? r L 70 k 6 11 6 60 1& • - r ? 80 ld'11 0.10 a END Head For Stmcturai Plea Corrugated Aluminum Pipe Arch Cuiven Nowing Full SUSA[IRGED OUTLCT CULV_Frr FLv?"I:h[G FL' L MY,'=H=?o-Lac, , U;. 1 /1 _ IYq i Ifll ?E li;y il- 162 STEEL DRAINAGE AND HIGHWAY CONSTRUCTION PRODUCTS 5 4 W w LL O LL O J 4 U u G IOV DISC HARGE-0-CFS 9 B W LL O = 6 r a W D ? J 6 U C U N.OT 0 200 40 so 500 1000 1200 1400 1600 1800 2000 2 CRITICAL DEPTH STRUCTURAL PLATE C. M. PIPE-ARCH 18 INCH CORNER RADIUS )o )0 Figure 3.37 Critical Depth. Corrugated steel structural plate pipe-arch curves to determine critical depth for outlet control computations.13 3. HYDRAULICS .9 8 ( Figure 3.38 CI critical depth f( 0 I.( ESP Associates, P .A. engineering • avn•ri_ning • plonni Ig Culvert Design Re-port Threatt/Mattis Subdivision Darcy Hopkins Drive at Sta 32+78.85, unnamed tributary of Flat Branch Recommended Structures: Concrete Arch, 16' span x 5' rise, 63 ft long Drainage area: 109 Ac. Allowable HW elev: HW/D=1.2, ELEV=602.90 Manning's n: left overbank 0.100; Channel 0.040; right overbank 0.100 (obtained from field observations and design build-out condition) Design Data Hydrologic method: SCS / TR55 Design Q: Q25 = 255 cfs Additional analysis: Qioo = 341 cfs Design tailwater elev.: For Q25, Tw=601.74 , For Qioo, Tw=601.74 Size and type: Conspan Arch, 16' span x 5' rise, 63 ft long Invert elevations: In - 597.17, Out - 597.10 (Pipe will be constructed at existing charnel grade.) Si d t Q Inlet control Outlet control R k ze an ype emar s cfs K. HW/D HW, ft d, d,+D 12 ho LS, HW 255 85 601.30 0 _ 602.51 outlet control 16' span x 5' rise, (25-r) 0 50 . elev 0 07 elev governs . . Concrete Arch 341 1602.05 603.16 outlet control 1.05 (X&-r) i elev elev governs Req' d outlet protection None. Natural stream flowline is maintained. Prepared by P. Greg Garrett, PE CON/SPAN Report **************** CON/SPAN Hydraulic Tools *?`*****?`******** Version 2.0 Date: 06/05/2003 Time: 6:05:06 PM File Name: Physical Data Culvert Type: CON/SPAN Culvert Span: 16.00 Ft. Rise: 4.00 Ft. Area: 54.73 Sq. Ft. Upstream Inv. El.: 598.17 K 15 nr? 6- CRt-rX1,4C ?,, e-pj we, s 7 SC C. Downstream Inv. El.: 598.10 Length: 63 Ft. SPE?r?iE? ;o CJ,?i7' FoanNi, DE?l4?'. Slope:.0011 Ft/Ft Number of Openings: 1 Mannings Roughness Coefficient for Culvert Top and Sides: 0.013 Mannings Roughness Coefficient for Culvert Bottom: 0.035 Composite Mannings Roughness Coefficient: 0.024 Hydraulic Data Discharge: 255 Cfs Tailwater Elevation: 601.74 Ft E Tailwater Depth: 3.64 Results Normal Depth = 4.00 Ft Critical Depth = 1.98 Ft Inlet Control HW: 3.20 Ft Inlet Condition: Unsubmerged Inlet Outlet Control HW: 4.34 Ft Outlet Velocity: 4.81 Ft/Sec Profile Type: M2 Drawdown Curve - Tailwater Depth as Control Friction Loss: .00 Ft Entrance Loss:.17 Ft Exit Loss:.00 Ft Total Head Loss:.17 Ft Governing HW Elevation: 602.51 Ft Outlet Control Governs CON/SPAN Report **************** CON/SPAN Hydraulic Tools **************:r•:i: Version 2.0 Date: 06/05/2003 Time: 6:05:50 PM File Name: Physical Data Culvert Type: CON/SPAN Culvert Span: 16.00 Ft. Rise: 4.00 Ft. Area: 54.73 Sq. Ft. Upstream Inv. El.: 598.17 Downstream Inv. El.: 598.10 Length: 63 Ft. Slope: .0011 Ft/Ft Number of Openings: 1 Mannings Roughness Coefficient for Culvert Top and Sides: 0.013 Mannings Roughness Coefficient for Culvert Bottom: 0.035 Composite Mannings Roughness Coefficient: 0.024 Hydraulic Data Discharge: 341 Cfs Tailwater Elevation: 601.74 Ft Tailwater Depth: 3.64 Results Normal Depth = 4.00 Ft Critical Depth = 2.40 Ft Inlet Control HW: 3.88 Ft Inlet Condition: Unsubmerged Inlet Outlet Control HW: 4.99 Ft Outlet Velocity: 6.44 Ft/Sec Profile Type: M2 Drawdown Curve - Tailwater Depth as Control Friction Loss: 10 Ft Entrance Loss:.30 Ft Exit Loss:.00 Ft Total Head Loss:.41 Ft Governing HW Elevation: 603.16 Ft Outlet Control Governs RB26 THREATT/MATTIS SUBDIVISION Permanent ditch design data DITCH 1 TYPE PD-1 173 22 .A (ar-) 0.800 Q, 3.37 SL (ft/ft) 0.0278 2 PD-1 Y1171 132 0.360 1.52 0.0199 3 PD-1 FES72 120 0.180 0.76 0.0430 4 PD-1 Y159 194 0.350 1.48 0.0222 5 PD-1 Y160 145 0.330 1.39 0.0310 6 PD-1 Y161 145 0.320 1.35 0.0200 7 PD-1 Y162 189 0.620 2.62 0.0200 8 PD-1 Y164 160 0.380 1.60 0.0246 9 PD-1 Y165 173 0.330 1.39 0.0200 10 PD-1 Y166 169 0.320 1.35 0.0285 11 PD-1 Y167 170 0.300 1.27 0.0200 12 PD-1 Y168 190 0.340 1.43 0.0200 13 PD-1 Y146 133 0.320 1.35 0.0233 14 PD-1 Y145 145 0.500 2.11 0.0361 15 PD-1 Y144 153 0.440 1.86 0.0206 16 PD-1 Y143 147 0.600 2.53 0.0199 17 PD-1 Y142 197 0.700 2.95 0.0201 18 PD-1 Y141 171 0.750 3.16 0.0203 19 PD-1 Y154 128 0.320 1.35 0.0234 20 PD-1 Y152 205 0.460 1.94 0.0230 21 PD-1 Y119 142 0.570 2.40 0.0335 22 PD-1 Y118 185 0.560 2.36 0.0200 23 PD-1 Y117 127 0.440 1.86 0.0291 24 PD-1 Y116A 162 0.500 2.11 0.0236 25 PD-1 Y116 166 0.480 2.02 0.0233 26 PD-1 Y115 193 0.640 2.70 0.0216 27 PD-1 Y120 149 0.270 1.14 0.0279 28 PD-1 OUTFALL 191 0.670 2.83 0.0230 F ESP Associates, P.A. Charlotte, NC Prepared by Khon Kounbandith HYDRAULIC RESULTS Discharge Peal: Flow Velocity Ifpsj Area [sq.ILJ Hydraulic Norm a lcfsl Period Ihrs __ I Radiuslkl Depth IftJ 3.4 0.1 2.01 1.65 0.30 0.45 LINER RESULTS S75 S - 0.0276 1 L Bottom J 1 4.0 Width = 200 ft 4.0 Not to Scale Reach Material T e Phase Veo. Tyne Soil Type Mannin_g's'n' Permissible Calculated safety Remarks Staple Pattern Cla" Veo. Densitt? Shear Stress Ipsf) Shear Stress Ipsfj Factor Straight S75 0.055 1.55 0.78 2.00 STABLE Staple D cn c`> cr, F° V- lt' UJ :? Ill L! I C C. L ?. C. r r F ' 77,E I i i X `J f - ?: F F.='C r? {• f-" a 4e/ ?.. rL 11 7' L ,. 1/. r V) U VJ LU u ! LL' LI LU W U? C") U) C: Q c: t C G r h' r (\<t CV C! Cam' C 1 \t lgf V/1 9 i f T*T n+1-: R f(Tl ( pry }y'{ ?"l - P f !1 ?` /?. - ? ?! ? UCH , f' f;.!-`'` .. ? ? ? C?ro' A < ? f r 4' 6666-565 (60L) 6ClBB DN '92na-id = •OYV 311078VH0 -40 ADO pivrvatrL doo7 wsytnoS 91601 WIN, oN '97707uVVO '090L Wog 'O 'd :MR Noiskil09ns sLu Wu V3NN1 6upuuv2d•6utiitan tartt:a6ul-zaau;6ua - Ovod S3LbOSSY ds MP•b'0 Pn7S Pool_49Z9ZN dVA'Y V3YV 3JVN/VYG 77KY340 ,_-\ ? ?/ :> ? ? Park _ I 1 r r ?. ?? - a8a ?- IQ _. a t? ` R .T s t ' h \ q A 3 f l\\\\ ?: \?. ` 1 _ ? ? etf eld? ?_r '` I- Vim---- \ rr s:Cf s, > 3 J F ?..I i 'ter rr° -.,.- 1 TiD Tiff- ,? r' l mss' SCIenario: Base STORM SEWER COMPUTATIONS Upstream Downstream Length Drainage Runoff Rainfall Total Full Pipe Design pstrea Upstream Upstream Structure Downstream Downstream Downstream Structure Constructed Pipe Upstream Structure Structure (ft) Area Coefficient . Intensity Runoff Capacity Diameter Velocity Invert Cover Hydraulic Grade Invert Cover Hydraulic Grade Slope Flow Rim (acres) C (in/hr) (cfs) (cfs) (ft/s) Elevation (ft) (ft) Elevation (ft) (ft) (ft/ft) Time Elevation (ft) (ft) (min) (ft) C132 C133 24.34 0.78 0.60 7.03 3.32 5.11 15 inch 3.58 617.50 5.61 618.32 617.37 5.74 618.32 0.005341 0.11 624.36 C133 OUTLET4 16.68 0.96 0.60 7.00 7.36 22.08 15 inch 11.09 617.16 5.95 617.66 615.50 3.25 616.75 0.099520 0.03 624.36 CB24 CB25 24.34 0.13 0.60 7.03 0.55 5.11 15 inch 0.72 600.16 2.35 600.86 600.03 2.48 600.86 0.005341 0.57 603.76 CB25 FES26 22.14 0.11 0.60 6.87 1.00 7.13 15 inch 0.87 599.83 2.68 600.85 599.60 3.15 600.85 0.010388 0.42 603.76 CB27 FES28 35.00 0.33 0.60 7.03 1.40 10.84 15 inch 2.57 607.84 2.35 608.25 607.00 2.75 608.25 0.024000 0.23 611.44 Y173 FES74 162.00 0.80 0.60 7.03 3.40 6.51 115 inch 4.07 617.40 2.35 618.04 616.00 1.75 617.25 0.008642 0.66 621.00 Title: Threatt/Mattis Subdivision Project Engineer: Khon Kounbandith v:1...\calculations\storm drainagelstorm#1.stm ESP Associates, PA StormCAD v4.1.1 [4.2014] 06!05/03 08:25:45 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA +1-203-755-1666 Page 1 of 1 Scenario: Base STORM SEWER COMPUTATIONS Upstream Structure Downstream Structure Length (ft) Drainage Area (acres) Runoff Coefficient C. Rainfall Intensity (in/hr) Total Runoff (cfs) Full Capacity (cfs) Pipe Diameter Design Velocity (ft/s) Upstream Invert Elevation (ft) Upstream Cover (ft) Upstream Structure Hydraulic Grade (ft) Downstream Invert Elevation (ft) Downstream Cover (ft) Downstream Structure Hydraulic Grade (ft) Constructed Slope (ft/ft) Pipe Flow Time (min) Upstream Rim Elevation (ft) Y119 Y118 189.94 0.57 0.60 7.03 2.42 9.88 15 inch 5.26 614.37 2.50 614.79 610.58 2.50 611.22 0.019954 0.60 618.12 Y118 Y117 125.26 0.56 0.60 6.86 4.69 9.54 15 inch 6.56 610.38 2.70 611.00 608.05 2.50 608.89 0.018601 0.32 614.33 CB5 CB6 34.14 0.90 0.60 7.03 3.83 7.85 15 inch 4.95 611.02 2.50 611.64 610.59 2.50 611.62 0.012595 0.11 614.77 Y117 YI16A 167.26 0.44 0.60 6.77 6.43 9.60 15 inch 7.77 607.85 2.70 608.60 604.70 2.55 605.56 0.018833 036 611.80 C136 CB7 196.84 0.97 0.60 7.00 7.91 10.15 15 inch 7.87 610.39 2.70 611.22 606.25 2.55 607.43 0.021032 0.42 614.34 Y116A YI16 164.14 0.50 0.60 6.68 8.36 13.29 18 inch 7.06 604.50 2.50 605.36 602.26 2.55 603.33 0.013647 0.39 608.50 C137 C138 36.65 0.33 0.60 6.88 9.16 10.12 18 inch 5.98 606.05 2.50 607.17 605.76 3.05 607.11 0.007913 0.10 610.05 Y116 YI15 198.29 0.48 0.60 6.58 10.14 15.16 18 inch 8.24 602.06 2.75 602.96 598.54 2.80 599.64 0.017752 0.40 606.31 CB8 C89 188.70 0.61 0.60 6.85 11.65 14.61 18 inch 8.86 605.56 3.25 606.57 602.45 3.00 603.53 0.016481 0.35 610.31 Y115 CB14 22.83 0.64 0.60 6.47 12.49 17.33 24 inch 5.84 598.34 2.50 599.60 598.23 3.13 599.55 0.005000 0.07 602.84 CB11 CB10 24.34 0.72 0.60 7.03 3.06 12.28 15 inch 3.51 601.05 2.50 601.72 600.301 3.25 601.71 0.030813 0.12 604.80 CB9 CB10 161.52 0.35 0.60 6.75 12.91 26.93 24 inch 6.89 602.25 2.70 603.23 600.30 2.50 601.71 0.012073 0.39 606.95 CB14 CB13 24.34 0.36 0.60 6.46 13.87 17.33 24 inch 5.34 598.03 3.33 599.51 597.90 3.46 599.51 0.005000 0.08 603.36 Y120 CB21 30.00 0.27 0.60 7.03 1.15 4.95 15 inch 1.87 599.27 2.50 599.83 599.12 3.05 599.83 0.005000 0.27 603.02 CB10 CB12 67.17 0.29 0.60 6.65 16.78 17.69 24 inch 6.41 600.10 2.70 601.65 599.75 2.80 598.82 0.005211 0.17 604.80 CB13 CB12 157.17 0.23 0.60 6.44 14.73 17.33 24 inch 5.48 597.70 3.66 599.12 596.92 5.63 598.82 0.005000 0.48 603.36 C621 CB22 24.34 0.74 0.60 6.96 4.25 5.11 15 inch 4.66 598.92 3.25 599.79 598.79 3.38 598.53 0.005341 0.09 603.42 CB12 CB22 116.82 0.01 0.60 6.33 30.48 51.09 36 inch 5.22 596.72 4.83 598.80 596.13 4.29 598.53 0.005000 0.37 604.55 C622 FES23 20.63 0.20 0.60 6.25 34.64 104.82 36 inch 5.14 595.93 4.49 598.50 595.50 2.50 598.50 0.0210471 0.07 603.42 Title: Threatt/Mattis Subdivision Project Engineer: Khon Kounbandith v:1...lcalculationslstorm drainagelstorm#2.stm ESP Associates, PA StormCAD v4.1.1 [4.2014] 06/18/03 10:01:01 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA +1-203-755-1666 Page 1 of 1 Scenario: Base STORM SEWER COMPUTATIONS Upstream Structure Downstream Structure Length (ft) Drainage Area (acres) Runoff Coefficient C. Rainfall Intensity (in/hr) Total Runoff (cfs) Full Capacity (cfs) Pipe Diameter Design Velocity (fUs) Upstream Invert Elevation (ft) Upstream Cover (ft) Upstream Structure Hydraulic Grade (ft) Downstream Invert Elevation (ft) Downstream Cover (ft) Downstream Structure Hydraulic Grade (ft) Constructed Slope (ftlft) Pipe Flow Time (min) Upstream Rim Elevation (ft) CB29 CB30 24.25 0.51 0.60 7.03 2.17 4.95 15 inch 2.27 611.95 2.50 612.81 611.83 2.62 612.81 0.005000 0.18 615.70 CB30 CB31 140.51 0.71 0.60 6.98 5.15 8.65 15 inch 6.99 611.63 2.82 612.32 609.48 2.50 610.24 0.015293 0.34 615.70 Y142 Y141 176.39 0.70 0.60 7.03 2.98 8.03 15 inch 4.35 602.41 2.50 602.94 600.09 2.35 601.16 0.013153 0.68 606.16 CB33 CB32 24.39 0.48 0.60 7.03 2.04 4.95 15 inch 2.49 605.51 2.50 606.25 605.39 2.62 606.25 0.005000 0.16 609.26 CB31 CB32 216.88 0.27 0.60 6.89 6.21 9.37 15 inch 6.85 609.28 2.70 610.02 605.39 2.62 606.25 0.017945 0.53 613.23 Y141 CB35A 123.43 0.75 0.60 6.84 6.00 8.06 18 inch 4.20 599.89 2.30 600.85 599.27 4.92 600.50 0.005023 0.49 603.69 CB32 CB35A 237.22 0.38 0.60 6.74 9.58 13.82 18 inch 8.44 605.19 2.57 606.11 601.69 2.50 600.50 0.014746 0.47 609.26 CB35A CB35 80.00 0.46 0.60 6.62 17.05 31.42 30 inch 5.67 599.07 4.12 600.38 598.67 3.56 600.29 0.005000 0.23 605.69 CB34 CB35 24.34 0.54 0.60 7.03 2.30 21.21 15 inch 6.59 600.91 2.57 601.18 598.67 4.81 600.29 0.091900 0.06 604.73 CB35 CB36 60.57 0.09 0.60 6.56 19.39 31.79 30 inch 5.09 598.47 3.76 600.14 598.16 3.48 600.14 0.005118 0.20 604.73 CB40 CB39 I 24.34 0.82 0.60 7.03 3.49 12.28 15 inch 2.84 599.65 2.50 601.51 598.90 3.25 601.45 0.030813 0.14 603.40 CB36 CB37 80.60 0.08 0.60 6.51 19.55 31.69 30 inch 4.34 597.96 3.68 599.96 597.55 2.98 599.96 0.005087 0.31 604.14 CB39 CB37 150.61 0.85 0.60 6.99 34.43 38.83 30 inch 7.37 598.70 2.20 600.83 597.55 2.98 599.96 0.007636 0.34 603.40 CB37 CB57 24.54 0.25 0.60 6.43 54.17 56.49 36 inch 9.10 597.35 2.68 599.71 597.20 2.83 599.50 0.006112 0.04 603.03 CB57 FES58 109.38 0.17 0.60 6.42 54.79 57.80 36 inch 8.74 597.00 3.03 599.33 596.30 3.73 599.00 0.006400 0.21 603.03 Title: Threatt/Mattis Subdivision Project Engineer: Khon Kounbandith v:1...lcalculationslstorm drainagelstorm#3.stm ESP Associates, PA StormCAD v4.1.1 [4.2014] 06/18103 02:54:03 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA +1-203-755-1666 Page 1 of 1 Scenar I^v: Base STORM SEWER COMPUTATIONS Upstream Structure Downstream Structure Length (ft) Drainage Area (acres) Runoff Coefficient Rainfall Intensity (in/hr) Total Runoff (cfs) Full Capacity (cfs) Pipe Diameter Design Velocity (ft/s) pstrea Invert Elevation (ft) Upstream Cover (ft) Upstream Structure Hydraulic Grade (ft) Downstream Invert Elevation (ft) Downstream Cover (ft) Downstream Structure Hydraulic Grade (ft) Constructed Slope (ft/ft) Pipe Flow Time (min) Upstream Rim Elevation (ft) CB50 CB49 24.37 0.29 0.60 7.03 1.23 4.95 15 inch 2.09 617.38 2.50 617.93 617.26 2.60 617.93 0.005000 0.19 621.13 CB49 CB48 250.00 0.50 0.60 6.98 3.33 8.72 15 inch 5.04 617.06 2.80 617.59 613.18 2.55 614.10 0.015513 0.83 621.11 Y154 CB53 100.19 0.32 0.60 7.03 1.36 8.82 15 inch 3.44 609.25 2.50 609.58 607.66 2.50 608.45 0.015870 0.49 613.00 YI46 YI45 145.10 0.32 0.60 7.03 1.36 12.13 15 inch 4.27 613.74 2.50 614.02 609.38 2.50 610.05 0.030048 0.57 617.49 CB48 CB47 24.39 0.45 0.60 6.74 5.06 8.05 18 inch 4.08 612.98 2.50 613.92 612.86 2.60 613.92 0.005000 0.10 616.98 CB53 YI52 154.52 0.81 0.60 6.89 4.71 7.90 15 inch 5.80 607.46 2.70 608.16 605.49 2.55 606.41 0.012749 0.44 611.41 YI45 YI44 155.73 0.50 0.60 6.87 3.41 7.71 15 inch 5.96 609.18 2.70 609.76 607.29 2.50 607.89 0.012136 0.44 613.13 CB47 CB47A 95.49 0.49 0.60 6.72 7.03 13.87 18 inch 6.75 612.66 2.80 613.41 611.24 2.50 612.24 0.014850 0.24 616.96 YI52 YI43 65.68 0.46 0.60 6.77 6.51 9.73 18 inch 4.92 605.29 2.50 606.19 604.81 2.80 606.06 0.007308 0.22 609.29 YI44 YI43 1 151.71 0.44 0.60 6.75 5.14 8.58 15 inch 5.75 607.09 2.70 607.79 604.81 3.05 606.06 0.015029 0.44 611.04 CB47A CB51A 114.94 0.14 0.60 6.66 7.53 14.82 18 inch 6.82 611.04 2.70 611.80 609.09 2.50 609.96 0.016965 0.28 615.24 CB51 CB51A 24.34 0.57 0.60 7.03 2.42 7.09 15 inch 3.34 609.34 2.50 609.96 609.09 2.75 609.96 0.010271 0.12 613.09 YI43 CB55 132.83 0.60 0.60 6.64 13.84 17.53 24 inch 5.81 604.61 2.50 605.95 603.93 2.80 605.30 0.005119 0.38 609.11 CB56 CB55 31.71 0.65 0.60 7.03 2.76 11.05 15 inch 2.98 604.72 2.50 605.45 603.93 3.55 605.30 0.024913 0.18 608.47 CB51A CB55 303.42 0.17 0.60 6.58 10.39 14.55 18 inch 7.55 608.89 2.70 609.83 603.93 3.30 605.30 0.016347 0.67 613.09 1 CB55 I CB39 422.80 0.53 0.60 6.42 28.11 47.49 30 inch 7.90 603.73 2.50 605.11 598.901 2.00 601.75 0.011424 0.89 608.73 Title: Brookhaven Subdivision - Phase 1 Project Engineer: Brent T. Niemann, PE v:1...lcalculationslstorm drainagelstorm#4.stm ESP Associates, PA StormCAD v4.1.1 [4.2014] 06/05/03 09:21:41 AM ©Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA +1-203.755-1666 Page 1 of 1 Scenario: Base STORM SEWER COMPUTATIONS Upstream Structure Downstream Structure Length (ft) Drainage Area (acres) Runoff Coeffident C. Rainfall Intensity (in/hr) Total Runoff (cfs) Full Capacity (cfs) Pipe Diameter Design Velocity (ft/s) pstrea Invert Elevation (ft) Upstream Cover (ft) Upstream Structure Hydraulic Grade (ft) Downstream Invert Elevation (ft) Downstream Cover (ft) Downstream Structure Hydraulic Grade (ft) Constructed Slope (ft/ft) Pipe Flow Time (min) Upstream Rim Elevation (ft) YI#59 YI#60 150.00 0.35 0.60 7.03 1.49 10.64 15 inch 5.36 620.23 2.50 620.55 616.76 2.50 617.15 0.023133 0.47 623.98 YI#60 YI#61 150.00 0.33 0.60 6.90 2.84 7.45 15 inch 3.99 616.56 2.70 617.09 614.86 2.50 616.34 0.011333 0.63 620.51 YI#61 YI#62 194.00 0.32 0.60 6.73 4.07 8.15 15 inch 3.31 614.66 2.70 616.31 612.03 2.55 615.65 0.013557 0.98 618.61 YI#62 YI#63 124.00 0.62 0.60 6.47 6.34 8.11 18inch 3.59 611.83 2.50 615.60 611.20 4.80 615.22 0.005081 0.58 615.83 YI#63 YI#64 170.00 0.10 0.60 6.34 118.80 186.80 48 inch 15.59 611.00 2.50 613.32 608.55 2.51 610.91 0.014412 0.18 617.50 Y1#64 YI#65 178.00 0.38 0.60 6.30 120.20 174.95 48 inch 15.00 608.35 2.71 610.79 606.10 2.50 608.30 0.012640 0.20 615.06 Y1#65 YI#66 238.00 0.33 0.60 6.25 121.39 199.45 48 inch 16.10 605.90 2.70 608.15 601.99 2.50 604.37 0.016429 0.25 612.60 YI#66 YI#67 175.00 0.32 0.60 6.20 122.51 175.65 48 inch 14.52 601.79 2.70 604.25 599.56 2.50 602.20 0.012743 0.20 608.49 YI#67 Y1#68 195.00 0.30 0.60 6.16 123.56 152.79 48 inch 11.85 599.36 2.70 602.09 597.48 2.50 601.19 0.009641 0.27 606.06 YI#68 JB#69 48.00 0.34 0.60 6.10 124.70 176.85 48 inch 10.65 597.28 2.70 600.56 596.66 3.34 600.56 0.012917 0.08 603.98 JB#69 FES#70 70.00 NIA N/A 6.08 124.66 126.14 48 inch 10.26 596.46 3.54 600.00 596.00 2.50 500.00 0.006571 0.11 604.00 YI#71 FES#72 125.30 0.36 0.60 7.03 1.53 4.96 15 inch 1.88 622.13 2.28 622.75 621.50 2.25 622.75 0.005028 1.11 625.66 /111-7 ! "i 707 ?"`? ??-T ,/. ; p ?• r Title: ThreatUMattis Subdivision Project Engineer: Brent T. Niemann, PE v:\...\calculations\storm drainage\storm#5.stm ESP Associates, PA StormCAD v4.1.1 [4.2014; 06105103 09:23:42 AM ©Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA +1-203-755-1666 Page 1 of 1 _ _ _ • VICINITY MAP -NOT TO SCALE GRADING AND DRAINAGE NOTES 1, ALL EXISTING STRUCTURES, UNLESS OTI~RWISE NOTED TO REMAM, FENCNG, TREES, E ETC„ WITHIN CONSTRUCTION AREA SHALL BE REMOVED E DISPOSED OF OFF SRE, ANY BURNING ON SITE SHALL BE Sl,6JECT TO LOCAL ORDINANCES E LOWE'S SPEGFICATIONS. LEGEND ~ HOME CENTERS, INC. P.O. BOX 1111 N, WILKESBORO, NC 28656 2. ALL DRAINAGE STRUCTURES SHALL BE PRECAST. EXISTING P PO ED DESCRIPTION >ESCRIPTION • • 3, ALL DRAINAGE STRUCTURES ANO STORM SEWER PIPES SHALL MEET I-IEAVY DUTY TRAFFIC EVI IONS R S (H20) LOAD~VG AND 8E INSTALLED ACCORDINGLY, -------979-- 979 CONTOUR LIB iONTOUR LINE ~ PRE•BiDSET QPOSTBIDSET ~ ~ ISSUE DATE ISSUE DATE 4, GENERAL CONTRACTOR SHALL NOTIFY ALL UTILITY COMPANES HAVING ll~t)ERGR0l1VD UTLITIES ON SITE OR IN RIGHT-OF-WAY PRIOR TO EXCAVATION, CONTRACTOR SHALL CONTACT 979,25 SPOT ELEVA UTLITY LOCATING COMPANY AND LOCATE ALL UTLITIES PRIOR TO GRADING START, iPOT ELEVATION ~a o ~,op DATE DESCRIPTION 2~ r ~ 4 REVISIONS PER COMMENTS 6/0 lO3 5, SITE GRADING SHALL NOT PROCEED UNTL EROSION CONTROL MEASURES HAVE BEEN O I) IN TALL . STORM DRA s iTORM DRAIN INLET S~ I PbREST AND COORDINATION AK iTORM DRAIN PIPE u '~R 6119!03 ®DWO COMMENTS b. AFTER PERMITS HAVE BEEN OBTANED E EROSION CONTROL MEASURES INSTALLED, THE _ _ _ _ = STORM DRAII CONTRACTOR SHALL GRADE BUILDING PAD, GARDEN CENTER E APRONS TO 0' - I/7 OF SUBGRADE AS PER SECTION 02300, DIVISION 2 OF LOWE'S STANDARD SITE SPEGRCATIONS, \ 6/30103 ®INSERTED NEW PROTO 7. IMMEDIATELY APPLY E COMPACT STONE BASE FOR BLILONG PAD TO +l- 1l7 PRIOR TO ~ ~ ~i REVISED TIE LINES .SB 7101103 ~~~VAv ~ ~ 711 F TI I `'vA ~ r'r I j ifs Illy---------- EXCAVATING INTERIOR E PERIMETER 00 NGS. 1 ~ \ \ F~ r ~ i~ / / ~ II II ` \ 7131103 ®SI~W JACK AND BORE ~ A ~AV ~ V r~ I ~i~i,-' ~1/, Y1 llllllll \ ~ v 1 ri/ - S T I/l 1111 ll 8, FRENCH DRAIN SHALL BE pVSTALLEO IF DRECTED BY THE GEOTEG-INICAL ENGW~R OR AS \ l ~ m ~ T I WALL "B" WI' VALL "B" WITH \ss SHOWN ON PLANS. ~ \ SEE \ V-SN~,PE \ \ I I , , / I \ ~ / ~ ,'%rrr/ gg0''f" ~ SWALE BEHIND ~ . 8!15103 ®AT REAR ROLL•UP DOOR TALE BEHIND ~ vDITCK DET141L ~ vv ,'rrrr- ~ I I 9. GENERAL CONTRACTOR SHALL PROVIDE 2' x 2' x 8' THICK CONCRETE APRON AT ALL ~ ~ ~ 1J ,~~'ior , J , 1111 v ~OR IMENSION \ v`v cg ~'%%r~~~ ~ ~ ~ Jlil / ~ 6115103 1 wau LocATIONs CLEANOUTS OUTSIDE OF BULDING. \ ~ \ / / r 11, / \ \ ~ ~ v~~ SIP T 988. r' Ijjllll~~ III ~ b4.OTW ~ 914!03 REVISED SPOT ELEV. 6 ~ ss WITH I I 2 OF LOWE'S ~ \ \ 'I ~ ~ I / 1 lhl( \ 10, ALL WORK SHALL BE DONE MV STRICT ACCORDANCE DN S ON \ 9, T Q , W I 1111 b3.06 ~ ~ GRADING AT TRUCK DOCK ~ 0 b0 120 6AT RIGHT IN~RIGHT OUT T N ITE PE FI ATION , ~ \ '~TW \ I hlillll ~ ~ S A DARD S S G C S ~ Q,Q III 1 ~ 80 OBW ` ' ~ ~ q~l 11 v ~ B, ALL R DRAIN TO BULDNG SHALL EI~D 5 OUTSIDE TI-E BULDING LIC\NTS AS SHOWN ON ~ \ u''11111 v IE-978.74 ~\\\\\VI ~ ~ OOF S ~ ~ ~ ~ / ~ III 111 ~ v\vvvvv v - - 11 g 2!1110 ®STORM DRAIN OUTLET PLAN AND SHALL BE PROVIDED WITH A TEMPORARY PLUG AT THE END. ~ ~ ~ / \ 1 \ I~IIllq \ 1 ~ ~ ` ` / _ 11111111 ~ 1\1 11\ ` ~ ~ I c- - ~ A ~111j11 v ~ ~ V11~AU \ ' ~ s SCALE I' b0' s ~ TW ~ / y ANSF R - I11~- ~ vav1v / / 7 TW ~ s~iNC.~,~m R6'RODIOSTION N - ~ ~ `80. W ;7 0 ~ ~ ~ \ ~ ~ ~ ~ ~ bO.OBW I ~ ~ wuaF oR PAR? IS PR01~61TED IMTHOUT TFE ~ / ~ ~ I ~ E1~RESS~ WRITI6V l"Af•5B~ CF LOV'E'S NOME ~ 1, \ ~ ~ ~ \ / \ I ~ \ ~ ( ~ ~ f@86~5, Nw COPiRl6a•If 10q ALL RK,NTS RES&1'ED I\ s v ~ v ~ vvvv 4 N,P, ~ v I~ I 1 1 ~ 9. v v, ETAII~NG 9 I, TW ~ .v vvv ~ ~ , - / ~ ~ \ \\11\ I I 1 I I I \ \ 9 \ ~ 979,251 \ I I I T ~ ~ • ~ 8 ,OBW 80,OBW ; 7 ; \ - 9,5 ~ ~ ONVERI (TYPICAL)! 80,OBW 1 ~ 1 ~ - v v \ ~ ~ \ \\`\111\ r A I I I 1 ~ ~ V A 1A~ VA -1 I I i 79,7 v 98 00~ vv v 9 0,00 v 8 v 0.00 i v v`, \ ~ ~ 9>0 - -ice ~ ~ V 1 \ ~ V A / 1 I 1 v . ` X I v lillly\vv1~ ~ I ` ~ ~ ~ / I I I 1 v i l l v vvI11~~~~, r 980. ~ ~ ~ ~ ~ ~ ~ \ 1 V A A \ - ~ bB,OTW ~ ~ ~ ~ v v v v io ~ I I\ ~ A p A \ ~ v I I i v V~ ~~A;` L'}~ / o I I 1 A ~ ~ I I ~ ~ ~ 'IVJ' F .0~~12~~~~` ,0~`; l ~ w~~1~~ vvv \ , ~ s ~ ~ ~~5.5 ~ O.OBW ) ~ ~ \ ~ \ ~ \ WET DETENTION BASIN DATA / ~ ~ I I ~ ~ ~ v 111 I ~ ~ ~ I F I ~ o \ V I `9 ~ -OE 12 ~ ~ ~ ~ PPC~Y b~ RI ~{2 ~ \ ~ ~ ~ ~ ~ ~ \~~~v`vvv vvv IC, 0 9.0&~ ~ ~ ~ ~ s. ~ -~y THICK} WFI ~ v v v ~ ~ v v v ~ - ~ ~ ~ ~ ~ ~ ILL RA D ~1~ ~ \ \ \ \ ~ ~ \ ` ~ AREA TO POND 1098 ACRES U~ \ IE ~OU~'~ ~ ~ Q v ~ v ~ ~ ~ I I I V 1 V ~ ~ ~ ~ \ ~r, \ ` " ~ ~1~ P TECT ~ FF ` ~ ~ \ CN 88 v ~ ~ ~ I ~ v ~ ~ / / ~ I I ~ \ \ ~~0 Mw 1 \ \ C 'C'~ ~ o a I-P \ 2 ~ 1 ~ \ V ~ ~ 975. ~ ~ ~ ~Ft?OM ERd N~ \ ` \ \ \ ~ BOTTOM OF POND 955.00' \ ~ ~ \ \ ~ ~ I TW \ , \ ~ \ \ PERMANENT POOL = 958,00' • • ~ I SLOPE ~ I I r ~ v v I I A~ v v~ v ~ ~ 6 10° I v 1 A A v ~ v~ vv v v ~ 980,00 ~ 980.00 \ ~ 978,58 ~ ~ ~ \ \ ~ \ ' ~ / / I ~ 9B V ~ , ~ , / p~ 1 I \ 8~ A \ \ , , ~ ~ 10 / , SOQBW I I I I ~ ~ \ W WET. Tf$ bN MAX, 2 YR STORAGE EL 9b3.75' \ ~ v ~ ~ s`~ i ~ v ~ 1 v I ~v ~ ~ ` ~v ~ MAX, 10 YR STORAGE EL 9b5.87' U ' ~ I I I11 \ I \ \ ~ \ \ ~ \ 9 ~ . ~ BASIN, \ \ ~ \ \ \ / ' / ' '~'~r'•' I BOTTOM E~ 5 .0 MAX, 25 YR STORAGE EL 9bb.b3' Z 128. I 1 v ~ ~ v v DUKE POWER / I ~ I I 1 v ~ 1o I I d , \ \ \ ~ v v A ~ , ) I \ ~ ~ - ~ ~ ~ ~ \ ~ ~ / STOP EL.I 9b ~0\ ~ , MAX. 100 YR STORAGE EL 9b7,09' Q` -----,-178' ROW ~ ~ I I III v ~ v 005 i 1 I I I II ~ v II v / ' ~ \ ~ ~ ~ ~ ~ 2 YR A V L ME • 58 704 CF ~ ~ ~ v ~ 1 I ( ~ ~ ~ v v v, ~ ~ ~ STOR GE 0 U N - i i ~ ~ I I I I I N ~ / / 1' I \ ~ I ~ ~ II v ~ ~ ~ ~ Z ~ `fl I ~ ~ I w ~ I ( ~ I l ~ , 10 YR STORAGE VOLUME 88,873 CF ~ ~ I ~ I I I l ~ ~ ~ Q N ~ I 1 I I I I o 1 ~ / l l 1 1 I \ _ / / m ~ ~ I I ~ I I I \ ~ ~ I ~ ~ ~ 25 YR STORAGE VOLUME = 101,277 CF U c I ti ~ ~ ~ v I v~ ~ ~ _ ~ F cHT / 80,OBW ~ I l i lJ 1 1 1 ~ ~ ~ I~ ~ I ~ I I I I I 1 ~ I S SP-18A F R ~ ~ ~ 100 YR STORAGE VOLUME 109,012 CF > I I ~ ~ l i I~ t.~ ~ v Q I ~ i ~ I ~ PO D RETROF ~ I RAINFALL ORIFICE ELEVATION • 958.00 Q - ~ ~ ~ - ° / ~ ~ ~I I ~ ~ I I ( I I 1 I _ ~ / I I II I ~ 1 M ~ - / , SLOTW I I II i I I II ~ ~ I I I ~ ll i I I ~ 71 1 M I t ~ I I ` 4 ~ I •I ~ ~ ~ ~ W , ~ I I I I i I SP CIFICATION \ ORIFICE TO BE 2' L d' 1 ~ l ~ ~ i I ~ 78N LF h0 ` r I a I ~ T P I 0' Q~~~ I I /P m, l ~ I I I ~ I ~ \ 0 OF R SER 96b 0 U c ~ _ - ~ , I IL I N ~ , I~ I I E V .0 , Q U I ~ m \ 0U ~ I ~ ~ I I ; I I ~ TOP OF DIKE - 9b8.00 ~ y ~ r + -v- ~,~04---- ~ 7" > 98 ,0 I ~ r r I 979,81 I N ~ 1~ - ~ r i ~ I I I MIN, SLOE ~ I I l ~ ~ I I IE I T 75.50 978. I . l i r l aA~~HE-D' AREI~ ~ r N ~ - --L~ - I I 0 } ~ I ~ ~ ~ INDICATES AREA TO J ~ ~ „ / ~ \ _ - ti. 979,75 , ~ , ~ J ~ ~'---J I I I l VEGETATEC WITH `o ~ ~ - _ ~ - I I I ~ I I ETLANDS SPE ~.IES ~ ~ - ~ ~ ~ 9,OBW . - - -~7 / ) o ~ OUf 6 _ _ 97937 - ~ / , I I w ~ ~ ~ ~ m 979 976,7x1 - ~ i / / / ' / I III, ~ ~ Z > _ - 9 - - ~ BW ~ ' / ~ - ~ , , , , l - ~,----~9$, ~ Q .c cv m - ~ ~ ~ .1 WIDE 9' I-R~N :ET ~ ti~'~G ~ / 956-~ / I I , C ~ ~ ~ ~ ~,i ' / ~ I - - II ~ ~ _ ~ 7TW ,~,~.L I i ill (r? j - 8" WATER LINE I 9 ~ r - 21 / ~ ~ - APPROX. LOCATION 11 ~ ^ • y - S~ ~ TAINING ao / ~ ~ ao _ ~ 9 r / / / / 175,--_~" ~ ~ ` . ~ it ~ ~ , / / / / ~ ~ 4 = fig, ~ ~ ss ~ h' / , ~ / - ~i ~ ' i °$1/00/ - ~ /g / kJ~k3O 9 , _i -Wf L-'E` ~ ~ J 971 _ , U ~ ~ 7 _ / r / i b0 I ~ / / / , / ~ N / b9,OTW ~ RETAI~NG I ~ ` ~ N / - ~ ro, ~ o ~ r' N.P. N HP .P, _ ~1~ F f W ~ r / N ,~-z HP ~ ~ ~ W WALL ~D I ~ ~ i m - ~ ~ ~ 1 t0 .95 , - ~ ~ 1 ,1.~, Mq ~ t0 ~ - ,'rC 976,95 Or 976,95/' 0~ ,-A7b.5 , / i I ~ ~1 ~ ~ w / / bI,OBW 17 LEVEL SPREADER ~ M -984- __S"' / / / , / / I~ 5 TW ~ ~LENGTN~ 44' a~~ ~ - 983--~ ~ - 13 ~ l ~ ~ ' I I ~'95j~ ~e~ ~ _ r ~ ~ bLOBW~ ~ ~ ;8 13~ WIDTf~, 5 ~ ~m H ' ~ r ~ % % / ~ ~ S' ti' 1. r' , / ~ i CONTROLLED ACCESS 'CAE ~ 9 / 6~, - I / I - '95 r i ,9 TO BE REMOVED AS _9 _~,~~fi r r ,P, ~ 6~ ~ ~ ~ E. _ U X7.2 ~ r - GRASSED UREA ~ 959--_ ~ Q NECESSARY DURING r r O' 909 , ~ ~ - r I 71. TW ~ CONSTRUCTION, AT THE EIS / r' g6 / ~ _ 59hOBW - ---sso___ I- ~,$.4 - Il ~ 971 ~ ~ OF CONSTRUCTION ANEW---' ti' / ~ ' 4 i 4 I ~ 4 - ' ~ r w FENCE WILL BE INSTALLEQ_PER'~ r / ~ , NCDOT STANDARDS, ~s r ~ / ss' S , s / ~r// .OBW - ~ _ -962_ r, SEE V SHAPE , Q ~ / / ~ ss - ,,'D1TCa'-0ET~,iL--------~ ~ w ~ 00 ~ / 0 7 ' - s i 3.' ~ p / ----967 - - c 6 ~ N _ ~ ~ ~ ~-DIMENSION------~ \ - c~°v t0 ~n ~ / / / r r,'i _ - b ~ ~ ~ ~ t0 p~ _ i ge`l' , , / r irr,(------970-~- \ ~ /ll / / / /g - 'i 'i-- A i i - T~APPA_c~ITC-I-#-E ,___~\\I /i/_ - - - - _ -ice _ = _ - A1t97~IIS_-~ETI_ ' -s7 ~ - _ / ~ 960---~'~~--- ~ _ / r _ ~ - 1~~===~L=~~~~ _ ' ~ ` ~ - i - ~ ~i ~ _----970-'_----'-__ - - z-~~-_ ___-t~-=-- =.t~~_==--_-_~~'i~ 'g6~%~_--- -_-965-_- _ _ - ~ ^ _ • - _ ` _=~za_-'=---~ --=_-970 ^ _Z5l<E~T-AlhrTl~l \ ~ it ~ ~i'~~'~ - a IAL 7 / _ - _ ~ _ ~ T ! 5' - , / _ - - ----r-- / / r` , ~'~-',,971 ~ Z N - / / ~ ,979 J 0] 0 • • -----97 - / / F _ - TC~ II BE MOVEQ - - / ~ ~ °w 977----- - ----------Ev ----975------ -----976----- ~ ~ ~ / / ~ / ~ Y - N ARY DURING ~ / ~ / DL ~p--------- --_k~76- - _ - --s7s----_____ ION. AT THE END EXISTING - Q OFI l~C RU GRADE II EXI TIN ~ - ~ U ~ - / / .-5_ ~ =~_-l~afi~LtE@~ DER- TO RE_LO_C_AT_E tl---~RAQE--~ ~ _ - - v I CBD ~ ~ - ---973 _ = fA -977--- o~, / _=2="- _ iGI~AL POSES ~I TOP 972.22 t I _ loll LE. 963.72 ~~.ELEC,~_' I- ~ - 15" RCP "III ~ ~ n' m --__----r~----- -w Il X `~g LL II APPRO IMATE ° APPROXIMATE W w -------975------SDI / Ti~~ _ ----r------ TOP 972.76 / 1 ~ O W ~ J WATEROLINEn ~ ° LbCATION B" / / 1 F WATER UNE <J/ I LE. 969.16 OUT / LE. 9967.62 Irv Z Q w 974-----~"---------- ---RAISE TOP T ~I _ o 0 \ w ELEV~ 972.E,J a II ~~,~~~--s71---- 0~ ~ Il CBDI ~--973---- _ w --9~3~.~~J TDP 972.30 IE=957.25' r' W w *~i I l L E. 965.50 ~ ~ ~ ~ ~ ~ _ ~ A - rte' of /n ~ -972----------------- ~ - 1 ~ ~ 36" RCP AUTION*** ~ ~ C ~ - - - ~ ~ -jam`- ce~_ w / " RC / TOP 974.33 ~ N.C. ONE CALL: UTILITY LOCATOR SERVICE CBD ~ y CBDI ~ E. 966.08 3 DAYS BEFORE DIGGING CALL TOP 3.50/ I ~ TOP 973.13 ~ ,E. 967.33 i TALL FREE 1-800-632-4949 off, LE 68 / • • A ONE CALL SYSTEM FOR COMMUNITY AND J08 SAFETY. ORIGINAL ~I ' ~ ~ ISSUE DATE: OU21103 ~ 11~ 'q7A A ,t-;~ . PERMIT SET CAUTION - ISSUE DATE: THE UNDERGROUND UTILITIES SHOWN HAVE BEEN LOCATED OUT TO BID FROM FIELD SURVEY INFORMATION AND EXISTING DRAWINGS THE SURVEYOR MAKES NO GUARANTEE THAT THE UNDERGROUND - - 9 v ISSUE DATE: UTILITIES SHOWN COMPRISE ALL SUCH UTILITIES IN THE AREA, EITHER IN SERVICE OR ABANDONED. THE SURVEYOR FURTHER DOES -9g0- % - DRAWING NUMBER: NOT WARRANT THAT THE UNDERGROUND UTILITIES SHOWN ARE IN THE EXACT LOCATION INDICATED, ALTHOUGH HE DOES CERTIFY THAT THEY ARE LOCATED AS ACCURATELY AS POSSIBLE FROM INFORMATION AVAILABLE. THE SURVEYOR HAS NOT PHYSICALLY LOCATED THE UNDERGROUND UTILITIES. SP-2 • • • • HOME CENTERS, INC. P.O. BOX 1111 N. WA.KESBORO, NC 28858 975 975 REVISI N S PRE~81D SET POST BID SET 1,431JE DATE ~ ISSUE DATE DATE DESCRIPTION 2-25-04 ADDED FOR STORMWATER EVISION 970 970 of PoNo EL 968.00 ' x4' CONC. ISER o BOLTED TRASH L. 966.0 RETAINING WALL 965 FROM TOP OF 965 RACK DETAIL POND TO Not To Scde ~ CLAY EXI TING GRADE S S CORE 7xa'xl/a' 7za'xl/a' IL GALVANZED GALVANIZED 2 ANGLE AN(,~,E 960 10'b'5' XISTING 960 7 s/a• GALVANr1Eo GRADE 0 :is~:::~:~1:~:?~:f:~':~::':::°":':0 WASI~R E NEX NUT I TACK WELD a6 GALVANIZED ~b 3/a'z8' GALVANIZED I I I CONCRETE ANTI- GALVANZED SMOOTH SMOOTH BAR I-EX BOLT P RMANENT OOL SEEP COLLAR I 4' I BAR • 4.07 O.C. TO THIS DRANANC Is THE PROPERTY oP Bowes NONE CENTERS, INC. ANY USE OR REPRODUCTION IN AIVGI-ES WHOLE OR PART 18 PRONBIR~ WRHOUT THE 955 E 958.00 I I 955 ExPRE88ED wRrrtEN CONSENT OF waves HONE I I BOTTOM of wEIR CENTERS,NC.COPrRIGI{rZ00,AlLRxil11SRESERVED ~ • I 7xa•xl/a• GALVANZED 4' ~ 38 LF OF O 30 RCP o I ,qa~ I ANGLE eoTToM of wE~R ~ I.0 ~ SLOPE 950 0 0 950 SIDE WALL 0 0• EMBED REBAR MO 0 0 Q 0 FRONT VIEW BOTTOM cal SECTION VIEW m~ ago 0 0 tL m SECTION THRU POND • ¦~¦¦r~ • SCALE I' 50' NORIZ U SCALES 1' • 5' VERT, Z ~ ~ 0 Z m Q ~ rorn C `CN G m Q>v Q c 0 6' D.I,P, TEE m ~ 4.00' Q c ~ oU y ~ INSIDE DIMENSION Der INSTALL SCREW CAP p } TOP OF RISER ' F CLEA UT ACCE N 0 OR NO SS ~ m (n EL.=966.00 a• TRASH RACK 0` tt3 REBAR 6' O.C. (EXISTING) h 0) (EXISTING) 0 0 ~p~= PERMANB~tT POOL. _ _ m Z mOc WATT SURFACE .c N m Q . EXISTING WEIR ELEVATION ~ ~ 0~ m TO BE RAISED TO 963.75' _ ~ NSTALL CAP AND DRLL AND WIDTH TO BE 0.44' ~ ~ RISER W 4•IOIF TO CREATE P REDUCED TO 0.44' - ~ SQED ORFICE (2 INCNI, STRUCTURE 10 YEAR RELEASE I ~ I UTILIZE LDED AL I ( 1 r RAIWFAI.L oRFICE DETAIL • KTS. ~ li FLANGES TO RETR "1 I ~ INSTALL ORIFICE ~ / ~ EL. =960.59 10.5 RIFICE N I~ EL. = 958.00 2"ORIFICE - - - V ~ ZN 1"RAINFALL RELEASE / . t0 / / VALVE STEM M••~ O Op " / / m~ 7.4 ORIFICE ~Kc ~ ~m M GROUT/SEAL EXISTING ORIFI / l~ _M BOTTOM OF POND I.E, OF 30 OUTLET PIPE 955.00 (EXISTING) Z IN " EL.=955,00 2 GATE VALVE TO BE INSTALLED AT BOTTOM OF Y U (EXISTING) RISER TO SERVE AS EMERGENCY GRAIN TL o V V tV 0 PLAN VlE~t ~o H ~o N.T.S. :T installlavel4ncl flush ~ Plpe or Di~'ch vzlth naturpl r ~ N 9 oun~ N cD 4utl~t 0~ M =M A a ~ 0 AREA TO BE PLANTED Q Ot WITH WETLAND SPECIES z} Sc>~rcre Prs~vl'ma~~ W - m Scour Hofp ~PSN) I- J o mi p: ~ w PERMANENT POOL ELEVATION l~IP Rqp Q Y basin Tat slto~r _ _ . ~ ~ Q w 1:or' olarft ? _ ~ J ~ FOREBAY J I U 2 I MAIN POND !#91. bl I. NA ~ ~ R ~ YI ~ Z U 44 ~ Q m S lL ~ MTV 6 ~ I SLOPE FQR 10' r o VEGETATED SHELF I y Z ~ ~ TRANSITION TO I. o O 19 ~ w 3~1 SLOPE SECTiU~I A-A ~ P~~ tu` 0lt~ PLANTING REQUIREMENTS: I- U 1~tCfi ,n rn V! V/ I~~ ~ V / ~}dt"~1r~t ~ I"- ~ ~ AT LEAST TWO SPECIES (DUCKWEED AND SOFT STEM BULL-RUSH) OR - W ~ _ _ _ _o-hura~ J (n ~ OTHER HARDY AND AGRESSIVE WETLAND SPECIES SHALL BE PLANTED ~I~~~In~B Q( ZQ I~erf lrlcass„~„ Rip Rrr I OVER 30% OF THE TOTAL VEGETATED SHELF AREA WITH INDIVIDUAL I thick Yrlt p ~ U4r~~ I'6 I''lit$r ~q O I?~"I~ ^ PLANTS 2.3 FEET APART. UP TO THREE SPECIES (FOR EXAMPLE -POND I.L J lL WEED, BUSHY BEARDGRASS & MARSH HIBISCUS) SHALL BE RANDOMLY • • DISTRIBUTED AROUND THE PERIMETER OF THE VEGETATED SHELF. A 4" ORIGINAL TOPSOIL LAYER IS REQUIRED FOR PLANTINGS. ALL OTHER SLOPE ISSUE DATE: 0212512003 PERMIT SET AKtAS I MA I WILL NU I bt FtKMANtN I LY INNUNUA I tU AND THAT AM: ISSUE DATE: 0212512003 DISTURBED WITH THE RETROFIT SHALL RECEIVE EROSION CONTROL CONSTRUCTION SET BLANKET AND SHALL BE HYDROSEEDED. ISSUE DATE: 10/10/0 DRAWING NUMBER: SPml 8A • • VICINITY MAP -NOT TO SCALE GRADING AND DRAINAGE NOTES G ALL EXISTING STRUCTURES, UV.ESS OTHERWISE NOTED TO REMAIN, FENCNNG, TREES, E ETC., WITHIN CONSTRUCTION AREA SHALL BE REMOVED DISPOSED ~ OFF SITE, ANY BURNING ON SITE SHALL BE SUBJECT TO LOCAL ORDINANCES E LOWE'S SPECIFICATIONS, LEGEND ~ HOME CENTERS, INC. P.O. BOX 1111 N. WILKESBORO, NC 28658 2. ALL DRAINAGE STRUCTURES SHALL BE PRECAST. EXISTING PROPO ED DESCRIPTION ESCRIPTION ~ • 3. ALL DRAINAGE STRUCTURES AND STORM SEWER PIPES SHALL MEET HEAVY DUTY TRAFFIC REVISIONS fH2O) LOADpvG AND BE INSTALLED ACCORDINGLY. -------979------- 979 CONTOUR LIN ONTOUR LINE PRE•BID SET Q POST BID SET ~ µU' ISSUE DATE ISSUE DATE 4. GENERAL CONTRACTOR SHALL NOTIFY ALL UTR.ITY COMPANIES HAVING UNDERGROUND UTLITIES ON SITE OR IN RIGHT-OF-WAY PRIOR TO EXCAVATION. CONTRACTOR SHALL CONTACT 979.25 SPOT ELEVA- UTLITY LOCATING CGNPANY AND LOCATE ALL UTLITIES PRIOR TO GRADING START, POT ELEVATION a Yy - ~oP DATE DESCRIPTION & z~ r ~ ~ REVI PER MMENTS sroaro3 ® sloNS co 5, SITE GRADING SHALL NOT PROCEED UNTL EROSION CONTROL MEASU2ES HAVE BEEN O INSTALLED. . STORM DRAM TORM DRAIN INLET ~ ~ FOREST AND COORDINATION Ax TORM DRAIN PIPE ~ ~a 6119ro3 DWO CoMMENTs 6. AFTER PERMITS HAVE BEEN OBTAINED E EROSION CONTROL MEASURES INSTALLED, THE _ _ _ _ = STORM DRAM CONTRACTOR SHALL GRADE BUILDING PAD, GARDEN CENTER E APRONS TO 0' - 112' OF SUBGRADE AS PER SECTION 02300, DIVISION 2 OF LOWE'S STANDARD SITE SPECIFICATIONS. 6130ros ®INSERTED NEW PROTo 7. IMMEDIATELY APPLY E COMPACT STONE BASE FOR BULDIIVG PAD TO +l- 1l2' PRIOR TO I i ~ ~ ~ / / / ~ L---------- ED TIE LINE ~ ~ro1roa ®RE>ns s EXCAVAT~NG INTERIOR E PERIMETER FOOTINGS. ~ 1 ~ -j/'/'i / /////II rrrll v - / 11 ~ \ ~ 7l31ro3 SHOW JACK AND BORE V 1 `Av ~ 1 ' l I ~~ii~-' lyl~l I ~~II~~I \ Q V l a/ - S //1~I N I 8, FRENCH DRAIN SHALL BE ~VSTALLED IF DRECTED BY THE GEOTECHNICAL ENGINEER OR AS ' I ITN \ss ALL "B W 1 ~ 'y. 8115ro3 AT REAR ROLL•UP DOOR 1 1 - ~ ~ r %i;;-' , ~ I WALL 'B' WIl SHOwN oN PLANS. ~ 1 SEE 1 V SN~PE v ~ I / I , , r 1 1 / ! 9eo-'` ~ SWALE BEHIND \ ALE BEHIND ~ NTRA TOR SHALL PROVIDE 2' x Z' x 8' THICK CONCRETE APRON AT ALL , ~ DITCH DET141L ~ / ; J Ilrll 9. GENERAL CO C ~ 8115ro3 ~ ®WALL LOCATIONS 1 ~i OR IMENSION 1 Cg ~;~%%i 1 IIII CLEANOUTS OUTSIDE OF BUDDING. \ ~ V , /a~i / 1~ l~ v 1 ` , I f T ~ 988. ~ / 1111,,111 ~Ir~v ~ 4. TW ~1 ss 914103 ®REVISED SPOT ELEV. d 1 \ , , ~ / hull`( I 10, ALL WORK SHALL BE DONE ~ STRICT ACCORDANCE WITH DNISION 2 OF LOWE'S ~ \ \ 9, T P ~'h q 11111111( \ 63.08 ~ GRADING ATTRUCKDOCK STANDARD SITE SPECFICATIONS, \ '~TW \ \ C~~ 11111111 ~ ~ 0. h I t \ A 8008W / ~ 1 v ti~~° ~ hMilil\ _ ,-1~~ vv ~ ~ ~ 1 0 60 120 & AT RIGHT INIRIGHT OUT ! ~ v ~ 1L11 IE-978.74' ~ \\1A1\\~ tl, ALL ROOF DRAINS TO BOLDING SHALL EM 5' OUTSIDE Tt~E BOLDING LIN9TS AS SHOWN ON ~ ~ ~ 1 / \ hh11111 ~ 1\ ~ ~ - - 2111/04 ®STORM DRAIN OUTLET PLAN AND SHALL BE PROVIDED WITH A TEMPORARY PLUG AT THE END. ~ \ ~ ~ / \ 1 \ 1111111 ~ / V III~111111 V 1A~\1\\\\V ~ _ ' ~ ss SCALE I" • 60' ~ I~ _ ~ 111111 \ ~ ~ 11\1\\ \ ~ ~ ~ y ANSF R 1 1L_~~'' ~ \1111\\ / / 7 TW f ~ ~ ~NC.BAN~Y rREPRODIJCSTION N - ~ ~ \ ~~80. W ~ 0 ~ ~ 1 \ ~ ~ 60.OBW I WHOLE OR PART L5 PR01.611ED IMTNOUT of / r ~ I ~ D Y1RmBV CONSEM OF LOWE'S HOME ~ ~ ~ ~ / ~ I V 1 ~ ~ ( (H~II&S. NO OOPiRKiIT 1001 ALL R16HfS RE5&VED 1 I II 1 1 6 ~~s ~h0 I. ` I ~ 5 / L `~v! vvvv 4 ` N.P. ~ ~ 1\ s v ~ v r v I / ~ ~ ~ 1 ~1 11 ~ I I 1 ~ 9. \ 9 ETAINING 1, TW ~ ~ 7 ~ ~ I l i 1 \ ~ y a, 9 9.25 I \ I i I I 9, 8 .OBW 80.OBW ; 7 ; \ ~ TW q' S ~ ~ 1 \ ONJERI (TYP~CA~)! 80.OBW 1 ~ ~ - IA°I r r I 1 ~ v ~ ~ 1 1111 vvv -1 vv ~ - -fir \ V ~ ~ \\VA \ ~A \ \ I I r ~ 79.7 ~ 1 98 OO'~ v v 9 0.00 1 8 ~v 0. r v ~v ~ ~ , I 1 ~ v ` ~ ~ ' 111 111 ~ r / I I ~I t 1 ~ ~ v I v 111111111 1 r v ,i l I r I - - \ ~ ~ I \ 1 1 ~L\,, ~ r 980.0 \ \ ~ ~ ~ , 68.OTW ~ ~ ~ ~ \ \ \ \ \ . ~ s ~ 9~.5 ~ ~ O.OBW \ ~ ~ _ ~ ~ \ \ \ \ \ \ WET DETENTION BASIN DATA F I I g \ v I ~ rPVC, 9.0~~ 0~ 12 ~ . ~ ~ ~ PPG~Y ~ RI N2 \ \ \ \ \ ~ ~ \ •~9.0~~ ~ ~ \ ~ ~ ~ THICK) W ~ ~ v v v v v vA\` \ , / o I I 1 ~ I ~ VA AI ~ ~ ~ i' vC ~ - ~ ~ ~ A ~T ~ \ ` \ \ \ AREA TO POND 10,98 ACRES ILLU~R D \ \ E BOUT` ~ ~ ~ Q v v v v ~ ~ I I I v 1 11A v ~ 1 ~ v ~ ~ `vv`v v CN•88 - ~v ~ ~ ~ , P~TECT FF~ ~v v v v v ~ \ v A ~ , ~ ' ' i~° ~ I I • 1 ' ~ 111 v~ ~ v v I I V v v ` o I I SLOPE 1 v v 1 1 v v` 980,00 975. ~ ` NFROM ERd \ ` \ \ ~ ~ BOTTOM OF POND 955.00' 0 / /6~^ / ~ v ~ ~ v v v v~ ~ ~ ' TW \ \ \ ~ \ \ \ ~ \ ~ PERMANENT POOL 958.00 ~ • 980.00 \ ~ 978.58 \ 1 ~ \ \ ~ \ ~ , W MAX / ~ 0~1 ~ 80. W ~ I I v aa, v vvv ~ ~ F , I I I \ \ ~ ~ \ \ ~ s \ 0 WET T~~TIbN\ ~ ® ~ 2 YR STORAGE EL 963.75 \ \ ~ 9 ~ ~ BASIN. \ \ MAX. 10 YR STORAGE EL 965.87 ~ 128. o ~ I I IIII \ 1 \ \ \ ~ ~ \ \ ~ / / , BOTTOM E 5 .0 MAX. 25 YR STORAGE EL 9b6,63 Z DUKE POWER / ~ F, / ~ I 1 1 ~ v~ v v v - i ,p , I I 1~ v~ v v v ' / r ~1 . I v \ \ \ \ r / ~ ~ TOP EL.I 96 ~O \ \ ~ , MAX. 100 YR STORAGE EL 967.09' Q` v v v~ / a 1 1 ~vv\ U ROV7 , 1 I I 11 v v S-- I I I I I v ~ - ~ v v ,i' ~ ,~po / / / I I I I ~ ~ ~ A / I A \ \ \ 1 ( ' \ \ ~ ~ \ \ ~ ~ ~ 2 YR STORAGE VOLUME 58,704 CF ~ I / ~ \ ~ ~ ~ ~ ~ , I I I ,1 ~ ~ r ( l v ~ \ ~ ' ~ I ~ . ~ 10 YR STORAGE VOLUME • 88,873 CF ~ m `D o - 84.0 W ~ ~ I ~ 1 ~ I 1 r I ~ I 1 ~ i ti i ~ ~ ~ • • / ~ \ 25 YR STORAGE VOLUME 101,277 CF U c N ~ F / I I I I 1 I I r I l r I I I ~ GHT / / 80.OBW I I I I ~ 1 I I C I I I R _ i' ~ ~ ° I ~ ~I I 7 ~ r I ) I 1 I I I I ` ti I ~ I, ~ S SP 18A F R ~ ~ ~ ~ ~ 100 YR STORAGE VOLUME 109,012 CF Q ~ 0 I , ~ I I ~ ~ '~,1 PO D RETROF ~ ~ I" RAINFALL ORIFICE ELEVATION • 95$.00' Q ~ ~ _ ~ / / I I I ~ I ~ I r I ~ i ~ ~ ~ ' ~ ~ ' ~ I I I P IFI ATI N v ~ RIFI ~ I , SLOTW I l I li I I Ili r ,r ~ I I i I I li ~I I - ~ - - / ~ I I 80,00 ~ Il? II I NC I m 78N LF 10 ~ i c l i~ S C C 0 0 CE TO BE 2 0~ I I ~ ~ i I i I I ~ TOP OF RISER 966.00' Q~~~ L_ - r r I ~ 1 I i HD~'E/P o~ LO ~ I \ Q O c I i i I ~ \ TOP OF DIKE 968.00' U 0 U ~ i MIN, SLOE ~ ~ I I I - y ~ ~ 1 ~1GO~ - ~ ~ '~79;87-~ > 98 .0 r r , r ' 919,87 ' I Mu X 1 1 - ~ r r I I I IE ~ T 75.5 978.5 , ' I f I I 1=1k AREA D N ~ OU O l i l i s / / J --L-- ~ } I ~ I ~ INDICATES AREA TO ~ --J vv ~ _ _ 1. 97 .75 , ~ ( i ~ I I , Ir VEGETATED WITH ~ y D ~ / ~ ~ _ ~ ' ~ I I ~ ~ ~ TW ETLANDS PECIES ~ ~ ~ `D ' ~ ~ 9.OBW S ~ ~ ~ ~ " c0 ' - - =~7 ~ ~ ~ ~ , S ~ 1E OUf ~u~~' - ' , ' e 9797 - / ~ 1 h 0) 9e 9797 8.2 / / ' / o , ~ ~ I _ _ , i p~ . _ - ~ 979.5 976,7F1 ~ - ~ I ~ yy~ q ~ RETAINING , 9ss- / I i ~ II ~ AI~VE' ~ 976.11' ; ' - ~ - 7 ~ W -L~" ' / I I I ~ AL I I UI - 8° WATER LINE 1 ~ ~ 21 / N i -~g~°'' ~ i , ' 72. TW s I ~ APPROX. LOCATION I / ~ ^ ~ ANING ~ / / ~ as J~ _ - ~ l ~ ~ ~ - ~ 58.OBW \ 1 ~ i9$ ~ ~ - - ~ it ~ ~ / ~ / ~ ~ / - - ~ 73 - ~ , 60.OB ,~s ss 1 ~ ~ - ' i' / /g gin 0~ / / ~Ji' ~ 1p-'~' 0 / _--yy~l,-~` - 971 ~ ~ / , U N - - ~ c^ ~ ~ i / I 7 ~ ~ i~ 60 i / -M ~ , RETA I / ( H a0 , / / ' ' ' ' - - ~ / ~ ' 6 TW 1~ING I f W ~ N.P. N - HP / ~ W 1 WALL `"p I , O cr, 9 / / ~ ~ 2, TW ~ ~~-959-- 1 N _ _ _ ~ _ - , C 976,95 0 ~ 976.95 ~ , Alb 5 0 r 9 i / / ; / 61.OBW 17 LEVEL SPREADER i ~ w M - ° ' ~ / ~ O10~ ' CYO` d Oil - 984 - _ Ste' ~ i i i 7 I~ 5 TW \L.ENG H 44 _ / ~ / i ~ 13 ~ I ~ ~ (61.OBW' I 1 >3~AS'~ WIDTi~ 5' '9s>, ~ ~ ~ ~ - ~ / ~ ~ ~ ~ 8 ~ ICI ~ z CONTROLLED ACCESS ~ g g6r - _ 7~ I / 1 ~ _ _ - ~ ' - _ 958 TO ~ REMOVED AS ~~t ~ 'P• , NECE ARY DURING -981-~- / ' ' ~ g6 ~ ~ _ SS ~ ,,76.70, g6~ ~ ~ ~ ~ ~ - - i 71. TW L-- GRASSED L`1REA 9ss--_ _ O CONSTRUCTION. AT THE EfcD ° ' gbh' / / 5 rOBW _ ~ - 3$4 - l1 ~ 971 -sso___ ~ ~ OF CONSTRUCTION ANEW---' 'L / FENCE WILL BE ~1STALLEQ-~'~ ~ / ~ , I - - ~ ~ _ --~ss1_ - W O NCDOT STANDARDS. ~s ' ~ ~ ss' S , s 1., ~ O / r~ ~ / .OBW ~ SEE V-SHAPE---- 9s2-__ _ ~t / 7 / ~ ~fi?ITCa--0ET~ctL------ W GO / ~ i ~ ° / ----967 _ - - ~g1 ~ / ~ / _ ~ \ 11 1 ~_~1 Fop-DIMENSION------J ~ ~ 91T~ ~ , / / i/,i,~------970-~_ 1 ~ -~z~ - ~-960---~~~------- ~ / ~ ~ ~ ~ _ TRAP-EZZ~]IIA_~~DITC-F#-E _ ~~1 - - _ _ _ - A1t97~IIS_-ETA= '--s72_ 1 _ _ ' ----J i ~ - --=~1= ~ / ~ - - - i i~ i' ~_-__--970-`--'"-- - =-ii~ ~ ~`--96~.-:.=-- --965---~ / ~ - ~ ~ - ~ r __T _ _ .y - S / _ _ ~ _=T~ _970-_./ ^ - ~ --.i- i' _ ~ ~ .~C,. ,i i'/ i~ ~ _ _ - ~-_-_-___==--~F- -I5>!E-L~T~41~ ~11~ _ ~ ~ Tx :9,5-' o 977----- - _ - - C,~ BE REMOYEQ - ~ O w - --------976-- - ~ ~ ~ , / ~ / ~ / Y ARY DURING ~ - - ~ / / ~ / OL UU ~ ----975------- ~P---o------- - ---~76_ _ ~ - ~ T _ -975-- _ - _ ~ G ~ ! ~ ~ ~ < < ~J EXISTING ION. AT THE END ~ - Opl GRADE li EXIT U 9 ° _ /~k/ _ - - - - - _ CONTRACTOR ~ ~ - ~ c^ _ - - - / / _ =-5= ~ -BE_-~15~1-tE@?4-PER- II _-GRADD~=> ~ _ 975=___~ ~ _ - _ TO RELOCATE ~tl ceol ~ 3 -977--- o~ / -------f - _ - - - III - _973-_= = = U) - __=2=_ 1GIVAl.. VOLES TOP 972.22 ~ e.:.__ - II _ IS" co II LE. 963.72 ~~ELEC. _ - ~ ~ - W APPRO (MATE APPROXIMATE W W ----975-------Cl3lll / ~ '91 LOCATION 8" ° Lb~CATION 8° / / W _ ~ 1, II- TOP 972.76 / ~ 1 ~ ~ O W / II LE. 969.16 OUT / LE. 9967.62 IN ~ ~ ~ Q WATER LINE F WATER UNE ~ / ° ~ J - w ~--~--ry-~ ------97a-----~---------- RAISE TOP T I `t',~'` - o w I ~•si w ELEV+ 97255 a II 2`; _9 - ~ 71- o~, IE=957.25' ~ II CBDI ~--973----~ ~ W - r1--9~}~---~J TOP 972.30 L w ~I ~ ~ f _ M I LE. 965.50 \ 0 / 1 ~ - 36" RCP ~ -972----------------- CAUTION 9~~ ` - p, - ~ W I- ~ ~ ti ~ 24,. Rc1S w N.C. ONE CALL; UTILITY LOCATOR SERVICE q W l ce>~__ W OL / " RC / TOP 974.33 CBD I 9 CBDI 966.08 3 DAYS BEFORE DIGGING CALL ~ TOP 973.13 O TOP 3.50/ I ~ ~,E. 967.33 ~I~ I.E. 68 / TOLL FREE 1-500-632-4949 °F o~ A ONE CALL SYSTEM FOR COMMUNITY AND JOB SAFETY. ~ '~1 ~ ORIGINAL ~ S 7 ~ ~ ISSUE DATE: OU21103 ~ 911 A ,/t--n, ~ PERM IT SET CAUTION ISSUE DATE: THE UNDERGROUND UTILITIES SHOWN HAVE BEEN LOCATED FROM FIELD SURVEY INFORMATION AND EXISTING DRAWINGS OUT TO BID THE SURVEYOR MAKES NO GUARANTEE THAT THE UNDERGROUND UTILITIES SHOWN COMPRISE ALL SUCH UTILITIES IN THE AREA, ISSUE DATE: EITHER IN SERVICE OR ABANDONED. THE SURVEYOR FURTHER DOES NOT WARRANT THAT THE UNDERGROUND UTILITIES SHOWN ARE N DRAWING NUMBER: THE EXACT LOCATION INDICATED, ALTHOUGH HE DOES CERTIFY THAT THEY ARE LOCATED AS ACCURATELY AS POSSIBLE FROM INFORMATION ~ ~ll AVAILABLE. THE SURVEYOR HAS NOT PHYSICALLY LOCATED THE UNDERGROUND UTILITIES. SPm2 • • HOME CENTERS, INC. P.o. Box ~ ~ t ~ N. wILKE3BORO, Nc 28358 975 975 • • REVI I N S PRE~BID SET P03T BID SET 133UE DATE ~ ISSUE DATE DATE DESCRIPTION 225.04 P A D OR STORMWA REVISION 970 7 OF POND 9 0 EL - 968.00 ' x4' CONC. ISER ° BOLTED TRASH L. - 966.0 RETAINING WALL 965 FROM TOP OF 965 RACK DETAIL POND TO Not To Scale ~ CLAY EXISTING GRADE S CORE IL 7x4'xV4" 7x4'xl/4' GALVANIZED GALVANIZED 2 ANGLE A~ 960 10'6'5' XISTING 960 2' - 3/4' GALVANIZED GRADE 0 :''~:~:`:?.::;:::~:~:`:`::::::`~:i`:2•'.•:~2',2 o WASHER HEX NJT TACK WELD ~6 GALVANZED ~6 I I i CONCRETE ANTI- ( 314'x8' GALVANIZED GALVANZED SMOOTH SMOOTH BAR HEX BOLT THIS DRAWINfi Is rNE PROPERLY OF LOWE'S NONE P RMANENT OOL SEEP COLLAR I 4' 4' I BAR • 4,07 O.C. TO cENTER3, INC. ANY USE OR aEPROOUCrroN IN NVGI-ES WHOLE DR PART IS PROFIIBRED N~THOUT TILE 955 E 958.00 I I 955 ExPRE38ED wT3nEN CONSENT of Lawee NOME I I BOTTOM OF WEIR cEN~ERax+c.caPrPoalrt~olAU.Rx~ns~sERYm • • I 7x4'~d/4' ~ LF OF 0 30 RCP • GALVANZED 4' I I ANGLE I.0 ~ SLOPE 950 0 0 950 I eoTTOM of WEIR SIDE WALL O D . EMBED REBAR MO r0 ~ Q 0 ~ FRONT VIEW BOTTOM (47 SECTION VIEW m .n a OW(~ F " OJ 0J ILW mW SEC110N THRU POND . • • SCALE I' 50' HORIZ U SCALES I" - 5' VERT, Z o~ ~ 0 Z m Q ~m~ C `CN L m Q > p Q~ 0 6' D•IP. TEE m ~ 4,00' Q c ~oU INSIDE DIMENSION h ~ (n L INSTALL SCREW CAP p TOP OF RISER ~ FOR CLEANOUT ACCESS `I n 0 EL =966.00 p~• TRASH RACK d ~ m rn 0` tt3 REBAR 6' O.C. (EXISTING) y m ~ (EXISTING) 0 0 ~ 0` _ PERMANENT POOL ~ - - - - - ~ - ~ Z m0> WATT SURFACE .c N ~ Q m EXISTING WEIR ELEVATION ~ m TO BE RAISED TO 963.75' ~ NSTALL CAP AND DRU. AND WIDTH TO BE 0.44' ~ ~ HOLE TO CREATE PR RISER REDUCED TO 0.44' - ~ SIZED ORIFICE (2 INCM. STRUCTURE 10 YEAR RELEASE ~ I ~ UTILIZE WELDED ETAL ~ ( ~ 1 1' RAINFALL Ot~ICE DETAL ~ • FLANGES TO RETROFI "1 I ~ INSTALL ORIFICE ~ / " ~ EL. =960.59 10.5 RIFICE N•T.S• ~ ~ N I~ EL. = 958.00 2"ORIFICE / - - - UN ZN 1"RAINFALL RELEASE / . t0 O~ / / VALVE STEM m~ 7.4"ORIFICE / / ' ~ ~ t0 W~ GROUTlSEAL EXISTING ORIFI / ~_M BOTTOM OF POND I,E, OF 30 OUTLET PIPE 955.00 ICI (EXISTING) Z IN " EL.=955.00 2 GATE VALVE TO BE INSTALLED AT BOTTOM OF Y U (EXISTING) RISER TO SERVE AS EMERGENCY DRAIN T~ o V T~ V v SAN VIEVt 0 ~o ICI ~ o F as W ~ N.T.S. ~ ft~ rt? In~~Alllevaland flush ~ Ip~ pr Dltch t ~rlth nofiuT-al rou ~ ~ nd~, N to ~ co c~ =M A A • ~ AREA TO BE PLANTED 0 Q c~ OC WITH WETLAND SPECIES Z s~~l"~ ~~~~(~I*I~t~d W - m aoDUr~ h4ai~ (PSH1 ~ I-- ? ~Rl~ Rtt~ ire Q Z Y basin a~a~ ~o°an ~ ~ PERMANENT POOL ELEVATION `~aT~ ` Q W cl~zrlt~# Q = FOREBAY I U '~v . ~ ~ a. 2 I MAIN POND tc~~~r~~ p ,,ryry f , , ~li x.l'~~ ' V ~ , w ' ~ ~ ~ U 4 Z 4 ~ ' Q „ m Z, S LL 0t MIN 6 i I SLOPE FOR 10' . ~ ~ VEGETATED SHELF O Z ~ TRANSITION TO I. o O 3~1 SLOPE PLANTING REQUIREMENTS: F- U ~t}~~ (n I~sl~ (n ~ I~~?I•Iil~~ I-- F- AT LEAST TWO SPECIES (D.UCKWEED AND SOFT STEM BULL-RUSH) OR ~ _ W ~ ~l~~~r t W f ~ - ~ ~ ~ OTHER HARDY AND AGRESSIVE WETLAND SPECIES SHALL BE PLANTED T ZQ OVER 30% OF THE TOTAL VEGETATED SHELF AREA WITH INDIVIDUAL I~~rs (aB~~,,,,~,,, Rip Ra a~ 1 fhi~l~ wBtf - ~ ~ u„rl, I`IEt~r Fcibrf 0 PLANTS 2.3 FEET APART. UP TO THREE SPECIES (FOR EXAMPLE -POND V 11 LL WEED, BUSHY BEARDGRASS & MARSH HIBISCUS) SHALL BE RANDOMLY • ~ DISTRIBUTED AROUND THE PERIMETER OF THE VEGETATED SHELF. A 4" ORIGINAL Iasi IF nnTF• ron~/~nns TUPSUIL LAYER 15 KF-UUIRED FUR PLANTINU5. ALL UTHER 51-UPE AREAS THAT WILL NOT BE PERMANENTLY INNUNDATED AND THAT ARE PERMIT SET ISSUE DATE: 0212512003 DISTURBED WITH THE RETROFIT SHALL RECEIVE EROSION CONTROL BLANKET AND SHALL BE HYDROSEEDED. CONSTRUCTION SET ISSUE DATE: 10/10/01 DRAWING NUMBER: SP=l 8A • • GRADING AND DRAINAGE NOTES VICINITY MAP - NOT TO SCALE)i I. ALL EXISTING STRUCTURES, UNLESS OTHERWISE NOTED TO REMAIN, FENCNG, TREES, E ETC., WITHIN CONSTRUCTION AREA SHALL BE REMOVED E DISPOSED OF OFF SITE. ANY BURNNG ON LEGEND SITE SHALL BE SUBJECT TO LOCAL ORDNANCES E LOWE'S SPECIFICATIONS. 2, ALL DRAINAGE STRUCTURES SHALL BE PRE -CAST. DESCRIPTION EXI TING PROPOSED 3. ALL DRAINAGE STRUCTURES AND STORM SEWER PIPES SHALL MEET HEAVY DUTY TRAFFIC (1420) LOADING AND BE NSTALLED ACCORDNGLY. ------- 979------- 979 CONTOUR LINE 4. GENERAL CONTRACTOR SHALL NOTFY ALL UTILITY COMPANIES HAVING UNDERGROUND UTILITIES ON SITE OR IN RIGHT-OF-WAY PRIOR TO EXCAVATION. CONTRACTOR SHALL CONTACT 979.25• SPOT ELEVATION UTILITY LOCATING COMPANY AND LOCATE ALL UTILITES PRIOR TO GRADING START. 5. SITE GRADING SHALL NOT PROCEED UNTIL EROSION CONTROL MEASURES HAVE BEENI NQ STORM DRAIN INLET INSTALLED. 6. AFTER PERMITS HAVE BEEN OBTAINED E EROSION CONTROL MEASURES NSTALLED. THE STORM DRAIN PIPE CONTRACTOR SHALL GRADE BUILDING PAD, GARDEN CENTER E APRONS TO 0' - V7 OF SLJBG12ADE AS PER SECTION 02300, DIVISION 2 OF LOWE'S STANDARD SITE SPECIFICATIONS. 7. IMMEDIATELY APPLY E COMPACT STONE BASE FOR BULDNG PAD TO •/- V? PRIOR TO EXCAVATNG NTERIOR E PERIMETER FOOTINGS.III�L_------------- a- FRENCH ----------- i\��';�f� \ \ � \\ \I \ I >��/ � � , FRENCH DRAIN SHALL BE INSTALLED F DIRECTED BY THE GEOTECHNICAL ENGNEER OR AS \ \\ / '���'' '_'25(l I WALL "B" WITHSHOWN ON PLANS. SEE\V-S41"t \\ 1 �i��/;;:; -,s��,, ♦ \%�"� eo-'��'r SWALE BEHIND OWE HOME CENTERS, INC. P.O. BOX 1111 N. WILKESBORO, NC 28656 • REVISIONS • OPRE-BID SET 0 POST BID SET ISSUE DATE ISSUE DATE DATE DESCRIPTION 8/04/03 ® REVISIONS PER COMMENTS AND COORDINATION REVISIONS PER NCDENR 8/19/03 ® DWQ COMMENTS 8/30/03 ® INSERTED NEW PROTO 7/01/03 ® REVISED TIE LINES ISED TAP ROTE TO 7/31/03 ® SHOW JACK AND BORE ADDED FEN ED MU_ \ DITCI-{ DETAIL \\\ / r / ������ ;9 f / Illll \ / \; AT REAR ROLL -UP DOOR 9. GENERAL CONTRACTOR SHALL PROVIDE 2' x 2' x 87 THICK CONCRETE APRON AT ALL ��p/ � ®WALL LOCATIONS \OR IMENSION \\ \ \ - "%� �`i`` llll \ \\ ®REVISED SPOT ELEV. & CLEANOUTS OUTSIDE OF BUILDING. \ 4 \\ CB / �i//i� ' / , / \1\1\ /� I1 \\ s 9/4� GRADING AT TRUCK DOCK T � 988. 64.OTW A;� nMIA1 \ \ \ S 10. ALL WORK SHALL BE DONE N STRICT ACCORDANCE WITH DIVISION 2 OF LOWE'S \ \ , STANDARD SITE SPECIFICATIONS. \\ \ �.OTW �\\\ \ �.� � \ 8 OBW � '� 1 I�\I\` E=978.74' - II. ALL ROOF DRAINS TO BUILDING SHALL END 5' OUTSIDE THE BUILDNG LMTS AS SHOWN ON PLAN AND SHALL BE PROVIDED WITH A TEMPORARY PLUG AT THE END. � \ � � \ / \ 1 ` \ �\l�\\ \ \ � � � \� _ I� -- \ \ \\\ \ \\�\\ 5------------- --- 111 /"/ ss TW _ 1 O ANSF RM_ �\ \\\\\ 7 80.W TW � \ \\ _ - / 60.OBW 1 \ \ s \ FO I. \ 5 I. Y \o\ ® 61'19.. \ \ m STAINING 9 T I. T 1 \ \ \ \ r-7.\ \ \ \ \ \ I I I I 9� 8 OBW 80.0 W_ I i \ \ \ `� � \ \ \ \ \ \ \ \ \ 0wERI (TYPIC,•\L)I 80.OBW 9.5 \\ \ \ \ 1 \\� \ \\ TIN, I l I 79.7 \\ 98 OCA\\ \\ `� 9 0.00 \\ 98 \;\ \\�\ O.O•\\� \ 9> 980.0 \ \ \ 68.OTW /iOF,155 -4F 101s, - 12" `\ S 9O\ \ \ -- 95.5 \ \ `\\ O.OBW PPCY \6\ i �, \ � THICK} Wio 0/ s1 \ \ II ,\� tpi'E-'IE yVUT\ ILLUSfRA��DI \T\O\ S\ \ \\ \ PROTECT \ PSC At\ I I HP \ 2 I I , \ \ \ \ /11•� x Ilrl� o"MM1* M/AlMIOrA I \ \ \ � _ \ I \ '0FROM \ \ \ \ \ / o , J I \ \ \ I 1 \ \ \ \ \ 975. \ \ ,QOM ERd�b\N� i I SLOPE \ \ \ r \ \ \ 1 \ \ ` \ \ ` \ �" \ ��\ \ \ \ \ \ \ ' 6/ ^oo� I 1 \ \14K \ I \ \ \ \ \ 980.00 \ \ 978.58\, TW \ \ \\ \ \\ \ \ F \ I ` `\9 \\\ `II �\ j \\ 0 W \ WET D�TL I\�N\Bo�eW STAKDARD \ / \ ) I � \ \ � \ \ \ �o � � / r �•. 1 I \ BASIN. \ \ \ \ ---- '' �'wow-�' 128. o I I I II 11 1 1 \ \ \\ \ \\ `\ `\ \ \ / / '-/•-- V� \I BOTTOM Et\I\ �j .0 DUKE POWEQ-- , /10�, �/ / I I I �IIJ�� ELIEV ��O■�'\> `\ `\ \ �� ^ / / / / a . •l 1\TOP EL. I 96$b / I '-----''6�// II III'> -`\\•\+• DD of -- - 84.OW ° rn III �11 1 1 ( �/ /'/ j 1 I I I 1 \\ 1\ \, \ I 11 j, �• �\\ /I\ S SP -18A F R \ \ �_-- cHT / , 80.OBW I I 1 \J11 I I `7 I ( 1 11 / l 11 II \ \ I \I 1\ 1 �r PO D RETROF `\ \ �81.OTW I I I I m 1 SP CIFICATION I � III 1 I �_ / � ) 1 / / 1 1 � 78 LF 10" \ 1 r I I 1 $O.OBW /ice\!��\\� I \ i I / / I 1 11� 8 X00 Ili .III HD�E/P� m\. 1.0% 8 ,�8 i }87 % \ > 98 .O / / 1 1 I MIN. SLOE _N / 979.87 J 1 IE BOUT- 75.50 978.5 1 \ ' 1 / �I �'��. _ I HED' AREA INDICATES AREt, TO ------ . �1 II 11 1 I II / B.OT%TLANDS VEGETATED WITH W 9A7 \ SPECIES -moi_--- �L Lt ' �_______ ----- ems• j ��� � �'�uv�T � s� : � • � • ,M-a\� " •'- :.ter... • Awli -976.11- 0 7/6.1110��i�Pi��/iil� moi /moi i_8" WATER LINE 61. APPROX. �OCATION ITAININGLF --- IVA 9 / / / ETAVIIVG / / 000/ ***CAUTION*** N.C. ONE CALL: UTILITY LOCATOR SERVICE 3 DAYS BEFORE DIGGING CALL TOLL FREE 1-800-632-4949 A ONE CALL SYSTEM FOR COMMUNITY AND JOB SAFETY. *** CAUTION °•° THE UNDERGROUND UTILITIES SHOWN HAVE BEEN LOCATED FROM FIELD SURVEY INFORMATION AND EXISTING DRAWINGS, THE SURVEYOR MAKES NO GUARANTEE THAT THE UNDERGROUND UTILITIES SHOWN COMPRISE ALL SUCH U71UTIES IN THE AREA. EITHER IN SERVICE OR ABANDONED. THE SURVEYOR FURTHER DOES NOT WARRANT THAT THE UNDERGROUND UTILITIES SHOWN ARE IN THE EXACT LOCATION INDICATED, ALTHOUGH HE DOES CERTIFY THAT THEY ARE LOCATED AS ACCURATELY AS POSSIBLE FROM INFORMATION AVAILABLE. THE SURVEYOR HAS NOT PHYSICALLY LOCATED THE UNDERGROUND UTILITIES. 3W` -0- -" --957 WIDECULV 9• 1-1 DETAINING ss vj O 60 120 1111 1 2/11/04 SCALE I" - 60' WET DETENTION BASIN DATA AREA TO POND = 10.98 ACRES CN - 88 BOTTOM OF POND - 955.00' PERMANENT POOL = 958.00' MAX. 2 YR STORAGE EL = 963.75' MAX. 10 YR STORAGE EL 965.87' MAX. 25 YR STORAGE EL 966.63' MAX. 100 YR STORAGE EL - 967.09' 2 YR STORAGE VOLUME = 58,704 CF 10 YR STORAGE VOLUME - 88,873 CF 25 YR STORAGE VOLUME - 101,277 CF 100 YR STORAGE VOLUME - 109,012 CF I" RAINFALL ORIFICE ELEVATION - 958.00' ORIFICE TO BE 2" TOP OF RISER = 966.00' TOP OF DIKE - 968.00' - / / / / i \ ® SS _ \ / /, � -�,,, - - _ ,,-, -- TW I RETAII\VING 1 - 5--/-,, - 7 C14 62.0TW' 976. 976.95 ,I76 5 / i \�N\p? \/61.OBW 17 LEVEL SPEADER - `\ \ \ /O[e� DCrn /7 55.OTW, I\ \LENGTH: 44'---- >\s -3 �Tignl�l`i °F \✓ /'//' o� ,'' /,/ I �/' I _ - 13 -' / `� ( 61.OBW' \ \ 8 E;AS� WVTI#1-,,5' 5/-- CONTROLLED ACCESS FENCE - 9� - -' - 5.O \ _ _ _ _ / �� 6�- ,-� ( ------ I / 1 ® - 9S8 MAR 2 TO BE REMOVED AS -�fi-_ / / �/ P. /, /'/o60 / ,//9 �� -� 7.20 I I. E. �� 958 6 \ _ _ 2004 NECESSARY fJU2WG �\ /' ,6:70, A �6� / ,� � I ,� �, - _-- -\ I 71. TW GRASSED AREA - 959 CONSTRUCTION. AT THE EVD,/ ge5' �1 5 rOB W - _ 4NATE QUAL",? "'C7!`�i` 64 OF CONSTRUCTION A NEW -I ' / ' \ ' 77A/ I r _ 4 �l FENCE WILL BE INSTALLED PER'---- --- _ - NCDOT STANDARDS. s�'-- / � - � � SEE V-SI-�AP�---- ------- -AL ss - - arrCa-DET- 7 ---ss7-- -- 6 f''� ffQQ--DIMENSION------ /'/ .1%'' , / ,/ / j'j''/, -----970-- // .� 957 ''' / /' �L i'' ' i' i / --'/ '-•- _`-- --TFc?4?-EZOIDALDIT C--I4_-E �� \\`. \=_\/� /\= sso-----_-- _� z- - - ----- - - - - _ i alt_97�I��i.Lt--_--972'\L-_--2.6 L5_z_ooAc:_ --A- iii SKE AL 977 ---- - --- ---- - -- - ---- \ --- - ------ --- --- ------s7s----- --- N ARY DURING -- °�---o ------ ---7s- _ -"� \-------- ION. _ AT THE _END= ---EXISTING } r -------- _ j\_ �_FalC�RU - - _-- GRADE CONTRACTOR' 1' EXI TIAICz _ - /----_-___--�� _ _ \=BE_IIVS_�aLtEV4-PES -- T RELOCATE. I-�RAQ�-- _977--- p� / /- -------------------AfNii: TLA_ \l=-=,_ 0 E /I-- TOP 972.22 \ l �`�-n`�►S - -------r-7--- -- - - = tG1QAL15^COLE:S _ II 11 I.E. 963.72 - W �I _ - RCP "SII APPRO :MATE W------975-------CgDi // ��__:__------------------------ LOCATION 8" O APPROXIMATE / / W TOP 972.76 WATER LINE F p LOBATION 8" / / W II I.E. 969.16 OUT I.E. 9967.62 IN- F WATER LINE < / IN / <-.- RAISE TOP _ - - --- - - ---974-----�----------- -- -� -- II oi, W --- ELEV: 972.55 O W----�.-- II CBDI r--973-- IE=957.25' w w� -9j3� �I TOP 972-30 LE. 965.50 O W. RCP --972-------_--- 24" RCP S �- & AT RIGHT IN/RIGHT OUT CENTERS, INC. ANY USE CR REVOOUCTICN N WHOLE CR PART IS PROI-KITED VVITWCUT TI -E EXPRESSED WRITTEN CONSENT OF LOVE'S HOME CBJiB2S NC. OCPYRK�T 20(11 ALL RIGHTS RES97JED �� Q••°•FESS/0• ' r SEAL 025419 kill V ON U_ Q > 0 I� a O � Q N aoU0 U) _ N J v O ^ c�QD (1)o D y m ., z O0 '> �.! (D LL AZ Lo 9 %..o " ZO�1 NLS ZN .M co CO ZU w� JM W T"�• O F ` � > �o J coco Z V LoN tD % � WV �M QCD Zr �m 0 U z U� N ^~' m •• 0 3 �UZ� 0 CD O z (f) U W LTJ I- Q >W of O 0 o CD _j IL U_ ORIGINAL ISSUE DATE: 01/21/03 PERMIT SET ISSUE DATE: OUT TO BID ISSUE DATE: DRAWING NUMBER. SP-2 � • • ¦ HOME CENTERS, INC. P.O. BOX 1111 N, WILKESBORO, NC 28859 • • 975 975 REVI I N 0 PRE-BID SET POST BID SET ISSUE DATE ~ ISSUE DATE DATE DESCRIPTION 2-25-04 ADDED 0 MWATER REVISIO 970 970 OF POND EL 968.00 ' x4' CONC. ISER ° L. 966.0 RETAINING W BOLTED TRASH ALL 965 FROM TOP OF 965 RACK DETAIL ~ POND TO Not To Scae CLAY EXISTING GRADES CORE 7xa'xl/a' 7xa'xll a' IL 2 GALVANZED GALVANIZED ANGLE A,~E 960 10'b'5' XISTING 960 GRADE 7 s/a• GALVANZED ~::0 WASHER E F~EX NUT TACK WELD ttb a I GALVANZED 6 3/a'x8' GALVANIZED P RMANENT I i CONCRETE ANTI- OOL EEP COLLAR GALVANZED SMOOTH SMOOTH BAR I-EX BOLT THIS DRAWING I5 THE PROPERTraF LOYVE'S HOME I 4' 4' I BAR • 4.07 O.C. TO cENTER3INC.ANr RREPR E 95 . S ANGLES u9EO ooucnoNlN I WHOLE OR PART 18 PROHIBITED WITHOUT THE 955 8 00 I I 955 I ExPRE88ED WRITTEN CONSENT OP IOWE'S HOME I I BOTTOM aF WEIR cErnE~,MC.ooPVrna+r~oo,AI.LRx~rr5RE5ERU~n xa' 4' • • ( 7 xl/ ~ 38 LF OF GALVANZED 4' 0 3 Po ~ 0 RC I ,44' I ANGLE ititi!!If?~~ ~ I.0 `b SLOPE CAR ~~i BorroM of wE~R I . 950 0 0 950 sloE wAU. pd..~F~ssi 9 0 0 rO ZO Q~ EMBED REBAR MO wrS~ L - Q,~ ON m ~ d '0 FRONT VIEW BoTroM cap SECTION VIEW o25a~s ~ 0 0 ~i~ P~ i~~ mt~i iii !f• STP ~ ~ //~tln ~ t~ Z SECTION THRU POND SCALEI I" 50' HORIZ U SCALE' I' - 5' VERT, Z o~ • O Z ~o Q ~ m C `~N L m Q > p Q~ 0 6' D.IP. TEE m ~ 4.00' Q ~ oU y ~ INSIDE DIMENSION L . TOP OF RISER ~ INSTALL SCREW CAP ~ } FOR CLEANOUT ACCESS J n 0 EL.=966.00 p,• TRASH RACK 0` tt3 REBAR 6" O.C. 0 ~ m in (EXISTING) (EXISTING) y m (I ~ ~ PERMANENT Pool. ~ - - - Z m0' EXISTING WEIR ELEVATION ~ WATER SERFAGE .c N ~ Q m TO BE RAISED TO 963.75' _ ~ ~ m AND WIDTH TO BE NSTALL CAP AND DRILL 0.44' ~ ~ REDUCED TO 0.44 - ~ RISE? W ISLE TO CREATE 10 YEAR RELEASE I SIZED ORIRCE (2 INCL. STRUCTURE I ~ UTILIZE WELDED AL I ( ~ t FLANGES TO RETROFIT) "1 I ~ INSTALL ORIFICE 1' HAINFAI.I.OF~ICE DETAL • • IV•T.S. ~ !L _ " EL. -960.59 10.5 RIFICE a L - N EL. = 958.00 2"ORIFICE / - - - U~ ZN 1"RAINFALL RELEASE / .M / / VALVE STEM h••I O ap m~ 7.4"ORIFICE / / ~ WM GROUTJSEAL EXISTING ORIFI / l~ YJ t'') BOTTOM OF POND I,E, OF 30 OUTLET PIPE 955.00 (EXISTING) = IN " Z EL.=955,00 2 GATE VALVE TO BE INSTALLED AT BOTTOM OF Y (EXISTING) RISER TO SERVE AS EMERGENCY DRAIN V L o T V ~A~ v~~vr ~o .o ~ ~a N.T.S. a~ t W ~ PI ~ Or a e m In;g~'gll I~ve~l aid flue, ~ P f~ltch ,s.~ ~rlth natu~-oi roui Q6i$I~~' r ~ tld, N ~ M 2 f0 ~i A • ~ • I O AREA TO BE PLANTED WITH WETLAND SPECIES ~ w, Z } ~~1Qrs ~~'~Ot"RdB!d W ~ m acaur~ Hale tP~l-f~ _ _ _ _ _ _ PERMANENT POOL ELEVATION f~l~ ~ ti Q Y nn~ln T,Ot ~I~OYfTT _ ~ ~ ~c~r cl«srft ~ ~ ~ Q W ~ _ FOREBAY J I 2 J ~ ~ ~ U n tl. ~ I MAIN POND t~SS ~ t1~t1~ R ~ N \ ~ U ~4 Z . F- Q- m _ ~ S LL. Ot MIN b ~ I SLOPE FOR 10' f O VEGETATED SHELF ~y Z ~ ~ ~ TRANSITION TO ~ - o O I D . w 3 ~ I SLOPE SECT~I i- W pC I- P~a+S a,r 9~t~n PLANTING REQUIREMENTS: U ,~+I~~ U) ~5 [itd'~ilr~l F- AT LEAST TWO SPECIES (DUCKWEED AND SOFT STEM BULL-RUSH) OR ~ _ W _ _ ~I~-rr~l W ~ ~J ~ OTHER HARDY AND AGRESSIVE WETLAND SPECIES SHALL BE PLANTED ~~nn~ DL I ~rf ~ Z Q OVER 30% OF THE TOTAL VEGETATED SHELF AREA WITH INDIVIDUAL ~ I tl~~~l~ art ~ ~`ucl~ I~ f ~lt~r !'al~rEc PLANTS 2-3 FEET APART. UP TO THREE SPECIES (FOR EXAMPLE -POND J ~L WEED, BUSHY BEARDGRASS & MARSH HIBISCUS) SHALL BE RANDOMLY • • DISTRIBUTED AROUND THE PERIMETER OF THE VEGETATED SHELF. A 4" ORIGINAL TAHA/\II 1 A\/P!'1 IA r1rA111l1rl1 PAP\ nl A•ITI.1/~w •1 1 ATI 11-n w1 wwl- Ice/ Ic nerc• 119l9RI9fY14 I VF-OVIL LMT MM IJ MMWUIrttU rVM I LAN I IM.70. ALL V I Mr-M JLUVL wvv- vn. -w- AREAS THAT WILL NOT BEPERMANENTLY INNUNDATED AND THAT ARE PERMIT SET DISTURBED WITH THE RETROFIT SHALL RECEIVE EROSION CONTROL ISSUE DATE: 02!2512003 BLANKET AND SHALL BE HYDROSEEDED. CONSTRUCTION SET ISSUE DATE: 10/10/01 DRAWING NUMBER: SPml 8A •