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HomeMy WebLinkAbout20061139 Ver 2_More Info Received_20071220Steve Mitchell Environmental Consulting 1813 Lancaster Drive Gamer, North Carolina 27529 919-550-9055(h) 919-971-6598 {c} srmitchell5l ~yahoo.com December 19, 2007 Lia Myott 1650 Mail Service Center Raleigh, N. C. 27600-1650 Subject: Modification of DWQ EXP# 06-1139v2 The Woods of Blair Hills Dear Ms. Myott: ~C~(~~C~ { l~i~ ~~s r"~B~Rnr~crl The information you requested is attached along with three cioies if the OCN. As we discussed this modification is necessary due to the fact that the permitted (exempt) impact for the sewer line stream crossing cannot be accomplished. The permitted crossing was to be accomplished via bore and jack under the stream feature and if attempted could/would result in collapse. The modification if two fold. To excavate the stream crossing and place the eight inch pipe into the trench and fill. This will result in only a temporary impact. If necessary, the stream will be dammed and the flow pumped around. Unfortunately this impact cannot be accomplished in a perpendicular manner as required by the Table of Uses. The exiting and receiving manholes are in place. The elevations and grade in the area of the stream crossing prohibit a crossing between 75 and 1 OS degrees. The buffer disturbance in this area will be kept to a minimum . The trench will be backfilled with the excavated soil material immediately following the placement of the sewer line. Mitigation for the impact to Zone 1 (1067 square feet) will be made through payment to EEP. 2. To not construct the required preformed scour hole and allow the stormwater to be treated while being conveyed through a fescue sod vegetated "swale" prior to delivery to an irrigation pond. This feature is man made and is located outside of natural drainage ways not subject to the Neuse Buffer Rules as per NBRRO OS-173. ` `~' ` All impacts other than the two mentioned above have been completed as previously permitted. These proposed impacts cannot be accomplished or reduced in any manner that would better protect water quality or minimize _ the riparian impact. Best management practices will be utilized during all ~,,,~,~:, ,tr#.,, ' construction activities to minimize the disturbance, preserve aquatic life and habitat, and protect water quality. If you should have any questions related to the information presented or are in need of additional information please do not hesitate to contact me. My cell number is 919-971-6598 or nights at 550-9055. Sincerely, Steve Mitchell 1•- ~cos~stem PROGRAM December 20, 2007 Jack Lichtner ECI Development 8317 Six Forks Road, Suite 203 Raleigh, NC 27615 Project: Woods of Blair Hills Expiration of Acceptance: June 20, 2008 County: Wake The purpose of this letter is to notify you that the North Carolina Ecosystem Enhancement Program (NCEEP) is willing to accept payment for impacts associated with the above referenced project. Please note that this decision does not assure that the payment will be approved by the permit issuing agencies as mitigation for project impacts. It is the responsibility of the applicant to contact these agencies to determine if payment to the NCEEP will be approved. This acceptance is valid for six months from the date of this Letter and is not transferable. Il' we have not received a copy of the issued 404 Permit/401 Certification/CAMA permit within this time frame, this acceptance will expire. It is the applicant's responsibility to send copies of the permits to NCEEP. Once NCEEP receives a copy of the permit(s) an invoice will be issued based on the required mitigation in that permit and payment must be made prior to conducting the authorized work. The amount of the In Lieu Fee to be paid to NCEEP by an applicant is calculated based upon the Fee Schedule and policies listed at www.nceep.net. Based on the information supplied by you the impacts that may require compensatory mitigation are summarized in the following table. Neuse 03020201 Stream (feet) Wetlands (acres) Buffer I (Sq. Ft.) Buffer II (Sq. Ft.) Cold Cool Warm Ri arian Non-Ri arian Coastal Marsh Impacts 0 0 0 0 0 0 1,067 920 Credits 0 0 0 0 0 0 3,201 1,380 Upon receipt of payment, EEP will take responsibility for providing the compensatory mitigation. If the regulatory agencies require mitigation credits greater than indicated above, and the applicant wants NCEEP [o be responsible for the additional mitigation, the applicant will need to submit a mitigation request to NCEEP for approval prior to permit issuance. The mitigation will be performed in accordance with the Memorandum of Understanding between the N. C. Department of Environment and Natural Resources and the U. S. Army Corps of Engineers dated November 4, 1998. If you have any questions or need additional information, please contact Kelly Williams at (919) 716-1921. Sincerely, dry Willi D. Gilmore, PE Director cc: Cyndi Karoly, NCDWQ Wetlands/401 Unit Thomas Brown, USACE-Raleigh (action id 2006-40822-292) Lia Myott, NCDWQ- Wetlands/401 Unit Steve Mitchell, agent File ~~~ R,P.StDYGK~... F ~ ... PYDtP,C~ ~ DGLY StatP~ gCDETIR North Carolina Ecosystem Enhancement Program, 1652 Mail Service Center, Raleigh, NC 27699-1 652 / 91 9-71 5-0476 / www.nceep.net Office Use Only: Form Version March OS USACE Action ID No. DWQ No. (If any particular item is not applicable to this project, please enter "Not Applicable" ar "N/A".) I. 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 ^ 401 Water Quality Certification X Express 401 Water Quality Certification 2. Nationwide, Regional or General Permit Number(s) Requested: NW 12 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 Ecosystem Enhancement Program (NCEEP) is proposed for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII, and check here: ^ 5. If your project is located in any of North Cazolina's twenty coastal counties (listed on page 4), and the project is within a North Cazolina Division of Coastal Management Area of Environmental Concern (see the top of page 2 for further details), check here: ^ II. Applicant Information D ~ ~ ~ ~~~ 1. Owner/Applicant Information ~~ Name:ECI Development c/o Mr. Jack Lichner ~ ~ 1, 2 0 Z OU T Mailing Address:8317 Six Forks Road, Suite 203 Ralei ,North Carolina 27615 DEAlR -WATER ClUr1L.ITY 1h~i'tANpg F,AtO STORl4/Yv,!~~{ 9RANCM Telephone Number:919-250 9256 Fax Number:919-250-1389 E-mail Address:www.ecicustomhomes.com 2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.} Name: Company Affiliation: Mailing Address: Telephone Number: Fax Number: E-mail Address: Page I of 8 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: The Woods of Blair Hills 2. T.LP. Project Number or State Project Number (NCDOT Only): 3. Property Identification Number (Tax PIN): i 783 44 5069, 1783 54 3219, 1783 54 7392 4. Location County: Wake Nearest Town: Wendell Subdivision name (include phase/lot number):The Woods of Blair Hills Directions to site (include road numbers/names, landmarks, etc.):Located on the east side of Lake Glad Road approximately 1075 feet north of its intersection with Old Nowell Road 5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) Decimal Degrees (6 digits minimum): 36 76 57 N 78 37 75 °W 6. Property size (acres):40.7 acres 7. Name of neazest receiving body of water: UT & Buffalo Creek 27-57-16(3),, C, NSW 8. River Basin: Neuse 03-04-06 (03020201) (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 site and general land use in the vicinity of the project at the time of this application :Infrastructure of development in place, roads, curb& gutter, etc 10. Describe the overall project in detail, including the type of equipment to be used: General earth moving equipment for road and house construction. The general land use in the vicinity of the subdivision is residential. Page 2 of 8 11. Explain the purpose of the proposed work: Dig open trench across stream to place 8 inch sewer line. if necessary block off flow of creek and~ump azound. Current permitting exisits for road construction !complete). Alter stormwater from approved pre-formed scour hole to centipede sod ditch with discharge to irri ag tion pond. 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.LP. project, along with construction schedules. Project has received DWQ 401 Water Quality Certification DWQ Exp 06-1139) and Authorization Certificate per Neuse Buffer Rules NBRRO OS-173, General Certification WQC #3402 Stormwater Permit NCGO10000 permit, and Wastewater Collection stem Extension Permit (WQ0030834). V. Future Project Plans Are any future permit requests anticipated for this project? If so, describe the anticipated work, and provide justification for the exclusion of this work from the current application. No further permits are anticipated. 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. Each impact must be listed separately in the tables below (e.g., culvert installation should be listed sepazately from riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts, permanent and temporary, must be listed, and must be labeled and clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) should 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. Provide a written description of the proposed impacts: Excavation and placement of 8 inch sewer line will temporarily disturb 23.2 linear feet of stream bed. A total of 2,375 square feet (Zone 1 1~-5 and Zone 296& of buffer will be disturbed within the permanent sewer easement Existing_permitted impacts include two road crossing_consisting of 103 feet of perennial stream and 48 feet of intermittent impact. ~ ~ ~ ~ ~~ Page 3 of S 2. Individually list wetland impacts. Types of 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. Impact COMPLETED. Wetland Impact Type of Wetland Located within Distance to Area of Site Number Type of Impact (e.g., forested, marsh, 100-year Floodplain Nearest Stream Impact (acres) (indicate on map) herbaceous, bog, etc.) es/no) (linear feet) Impact #2 Permanent Road Headwater wetland No +/- 120 feet 0.03 Crossing Total Wetland Impact (acres} 0.03 3. List the total acreage (estimated) of all existing wetlands on the property: 5.26 acres 4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib walls, 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. To calculate acreage, multiply length X width, then divide by 43,560. 3 * is impact requested in modification of 401 /404 Permit. Other impacts completed. Stream Impact Perennial 0 Average Impact Area of Number Stream Name Type of Impact 7 Intermittent Stream Width Length Impact indicate on ma . Before Im act linear feet (acres 3* UT Buffalo Creek Temporary Perennial 30 15* 0.012 Impact #1 UT Buffalo Creek Permanent Road Perennial 11'-12' 103' 0.033 Crossing Impact #4 UT Buffalo Creek Permanent Road Itermittent 14' 15' 48 0.019 Grassing Proposed Temporary Stream Crossing Impact (by length and acreage) 15* 0.04 Total Permanent Stream Impact (by length and acreage) 151' OA52 * Actual linear foot disturbance due to 60° crossing is 17.5 5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U.S.). Open water impacts include, but are not limited to fill, excavation, dredging, flooding, drainage, bulkheads, etc. Open Water Impact Name of Waterbody Type of Waterbody Area of Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact (indicate on ma ocean, etc. (acres 3* UT Buffalo Creek Temporary (excavate Stream 0.01.2 & fill Total Open Water Impact (acres) 0.012 Page 4 of 8 6. List the cumulative impact to all Waters of the U.S. resulting from the project: Permitted Requested Stream Im act (acres): 0.052 0.012 Wetland Im act (acres): 0.03 O n Water Im act (acres): 0 Total Impact to Waters of the U.S. (acres) temporary 0.082 0.012 Total Stream Im act (linear feet): 151 15* * actual linear foot impact due to 60~ crossing is 17.5 7. Isolated Waters Do any isolated waters exist on the property? ^ Yes X No Describe all impacts to isolated waters, and include the type of water (wetland or stream) and the size of the proposed impact (acres or linear feet). Please note that this section only applies to waters that have specifically been determined to be isolated by the USACE. NA 8. 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 ar spillway, etc.): NA Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.):NA Current land use in the vicinity of the pond:NA Size of watershed draining to pond:NA Expected pond surface area:NA 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 followed during construction to reduce impacts. Wetlands delineated and impacts avoided and minimized. Permitted .impacts are completed except sewerline crossing Project is approved to jack and bore under the stream disturbing~a much larger amount of buffer. The substrate below the stream is striated ranite and this makes it impossibile to accomplish. Proposal is to dim and open trench and place the sewer line in. (Three feet deep). VIII. Mitigation 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 Page 5 of 8 freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on January 15, 2402, 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 NCEEP 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:/Ih2o.enr.state.ne.us/nc~~etlands/strm~idt.html. 1. 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 needed. In situations in the past where stream impacts are under 150 feet or temporary impacts to unimportant/intermittent streams have occurred mitigation is not required by the USACE and cannot be required by NCDWO therefore mitigation has not been proposed. However, should mitigation be required, the applicant shall use the EEP. 2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at (919) 715-0476 to determine availability, and written approval from the NCEEP indicating that they are will to accept payment for the mitigation must be attached to this form. For additional information regarding the application process for the NCEEP, check the NCEEP website at http:,~/h2o.enr,state.nc.us!wr~/index,htm. If use of the NCEEP is proposed, please check the appropriate box on page five and provide the following information: Amount of stream mitigation requested (linear feet): 0 Amount of buffer mitigation requested (square feet): 1067 Amount of Riparian wetland mitigation requested (acres): 0 Amount ofNon-riparian wetland mitigation requested (acres): 0 Amount of Coastal wetland mitigation requested (acres): 0 Page 6 of 8 IX. X. Environmental Documentation (required by DWQ) 1. Does the project involve an expenditure of public (federal/state/local) funds or the use of public (federal/state) land? Yes ^ No X 2. 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 ^ 3. 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. 1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 42B .0243 (Catawba) 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify Meuse Yes X No ^ 2. If "yes", 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. Impact No. 3 Zone* Impact (s uare feet) Multiplier Required Miti ation 1 1067 3 (2 for Catawba) 3,021 2 720 1.5 NA Total 1787 NA * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 2B .0242 or .0244, or .0260. Buffer mitigation will be met throuell EEP. Page 7 of 8 XI. Stormwater (required by DWQ) Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss Stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. If percent impervious surface exceeds 20%, please provide calculations demonstrating total proposed impervious level. NA Stormwater has been permitted. Eliminate one pre-formed scour hole and transfer Stormwater through grassed Swale (ditch) to irrigation pond. XII. Sewage Disposal (required by DWQ) Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. WWTP XIII. Violations (required by DWQ) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules? Yes ^ No X Is this anafter-the-fact permit application? Yes ^ No X XIV. Cumulative Impacts (required by DWQ) Will this project (based on past and reasonably anticipated future impacts) result in additional development, which could impact nearby downstream water quality? Yes ^ No X If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with the most recent North Carolina Division of Water Quality policy posted on our website at http:r/h2o.enr.state.nc.us/nc~~~etlands. If no, please provide a short narrative description: Proiect is already approved for the construction of 51 residential homes. Project does not meet any of the three criteria of private projects that can clearly result in cumulative impacts. XV. Other Circumstances (Opfional): 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). NA Applicant/Agent's Signat a Date ~ 2 `~` ~ (Agent's signature is valid only if an a~za n le r from the applicant is provided.) Page 8 of 8 ~ .~ ^i •~~~ ~~ • ~t ,Lf ~ .:,~ J.~._.~ ~~~ -~~ L -`" T `~• 1 ~~ - .1 -. ~~ "~`~' o ~ .' ` .p e ~ '~~ '. Z. • ~• .v....,,., w"` • L / ~ i,-' J ~ ~`'; J_ ~. ~ 1, ~ ~' ~ _ ~ . ~~ ~~ ii ~ , ~~ ~ ~~ ~ ~y IV ~ • -. 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Zonat ;~ r+pari~ts4 bt~fibr ivrzpaat is sllaev~t as 3t Q sy. teen irl Sectirsn 'x'1;..1,, 92~ ~. feet on the talnl<~, and `~'2f} sq. l~cCt on the ssabtrsittcad plan shr~ets, b. ]'lease provide 1"..ir:P acc~rtasrce letx~~:x'lor Zx~ne l ri~ariar~ bu~~'er irrrpacrs that At`C required wlaer~ ari "other d:am perperZdic~.iar crossing:° is pz'opns+~d. ~d. Please provide crass sKCtianal c~~msiYUCtion details of the prt~posed itrDpflct site ~sh~awistg floc rertuirywe hrv,rial depth, atc,), z..[. -~; >~:_t. . 2. ~r~.ssed swalc; ~. PicasC ~ °: c ~ ar:+ . r ,provide a BMP Svppieineni L'~-rrn fox the presposed ~ssc:d swa.le. "!11>r ~~~ supp~'t;.zx~~tst Forms sae avAilable at 1y:Cli1Z,o.anr, ate_ne.ta~sul~6,j~ i ~ . Plei~~e inC!l~de ~`i: Elie L3a~99g3~ Summary srid the Regi~ir~e? Mir~s~,s ~'hec~ist plc+,ixq e:wdi?y rill fife rrq~aired iterrau ii.stc;t; th~:rgi~~. <' b. lalease include a signed rtind nat.~:t°iie;cl, F,z;spectie, ~rr+d l~~i.aarsi:~tanc:e .~,~rre~ra',er-t Pr.~n;t rtz t2air praalx~sc•ra ;~ ` "_. ay,9'aSSCd Rvi'Alc, / r ~ ~~t ° , ,.~~ ,. ~,' ~ln+i iZ fr ~il r~~ rv} r . Z ~, ~ : d ;; ni; ' ~ r~ E ~..,; ~. ~ ~'' ;.. 1?lease size floc s~~4e• ~a~ ~iith ans~:a resed ~riri e~i'tsirRi.n lads end czffs+ic; ~t~vrst ertirat~ cif :s*~ra~e.7 ~ • ~ „ .. i>+ ~~ tiT1tr;+~~l° ~i1~C.E, Z'i'1C: ,~7S~SSL'4l ~~~,M'ili~ a}~;~ea:51o r't;ti:L"B4'S` 'r•;,rrlrsff ~'rc~'d71 90fli"3 p~rLtc~r1 Of tl?e lain :C Ili4. S+'t'SC~rws ~~~.~ z6 (?,e_ d. l~letase 19=GVide Suppc:irtare~ a afrulati~ra~s far e~t;i;ara~tirau floe fla~~,+s sne? weaocities indi~ttd icrr thc: ;Masi D. A. sheet 3 ,_,r ,~+f€~~4' _::a a-! a'-~ ~ ~~5-s~e7,=;.1 U,3~ Gin- e., Pieasse sctcct one:: iaf rl~e• }.,;rases s~.yec.i~ecl in 'i~alale 2 of ties ~r~s~~~c~'~`rvi~de' Ciza~Tt~a~ aaftf~c~ ~r`r~:rrOz G/t.~A~7 ,' _ CarrrdiraU 13us~s'V''r,~a1u,~~+*neru Pract7ces M.crrrt4trl tit,~t avail bw suitab;~,1°hr the site, it~5tead ~jt`C":aratsp~ade ~9:?~ 2~<J •+~.: r,, , sod as speci~rrd on phut sheet 3}, ~ ~~ c.L. Fc r~~.<..~~._ f. Coa~s*nrctiort Sequence shall peLify hflw tike ,grassed svvi3le (arid ttrty ©titer prc~~sosoci 13~~P`) shell be ix,b~iled• In pazticulrir, pleass~ specify how the w~eclbe~:d shastl bcs protected before vc~etat~iora is established. ~=>Rr_<,,<~,r~o~: r ~ :~[~;._,~~-3c.~~ , ~'x tc s-( r~ ~?, ~_ ~x:~il~ ~r~, ~_ A u2 Efi o a ~ _ . _, .,.~.____ -- ____.__.~. / ~-- ____._., -- - ,Caro ~~ e~7° t've?S1R~°. + Fxp~r3a^z ReU6emr PermtSriq Un~i ~Qr~`llPiU'i~tJ t5~ rh,/`i; 8eiviCE Cpnrpr, Ra~ei~h, NiaKh C~to7i~ra 2?~i'~9•i65t3 `:511 Crobtros Boufa~~ro. Suits 25G+, Ralcf~n, hrM.~s,^.arrltrrx 27fGA +'[+«s~; 914-i y3~17'd~ f ~RX 919.733~i3$~'1 t inl~t~.~'a littA:l~'tXa} :qtr.tiro~zi'~r.:VS.Jgc~„•r!:_~t~;+,~ti b,t~ Squ~! G7GZ~7ft~atlityt.v"`i3rfAii~ru Ac'~on Frnpl~wr.,. 50~ Recytled6lU°+° ~bst ~ra+lSJfi+CP P;~r 1:1.,7: ~pi)7 t~O.43 FaX fl19 25r~ ]181 ECI rD5'Tf)M Hc7~fE5 l~tlfr~S f~Caa nEC - i (-r~'.l~it37 1. c': i'4 r R~JP'f: D(~d~ -WETL~t~-S ~l.'~7~3689~ TG: `~25~1:3~9 ~: 3'? Plvasc rc:~pond within five (5) daya of the daatc of ti+.f~ lattor by aendkng thr~o (3) topics of this informaiivn. The ~,cpres:~ Rqv{ow Prc~gra~rt is a pracesa that requires all pasties to participate i.z~ n timely unanner. '~`Itis~ Lotto: only addresses the ap~SlfeatacrRti rGView 3rid does not authorize any impacts tv wetlands, waters or prntecteci 37u1'~ery. Please contact Lis Myatt at (~! 9) 7339502 or Joseph Gyamfi at {9 J 9~ 153473 if you lave any questions. 9inc ly, , ~:yndi K3a-uly, Supervisor 401/1~xpresas Itcview UverSite 7lJnit t'.~,lt:,•~,~~a~fi ~c: 1lauren '4G Etherspuon, i?WQ Raleigh R,egiortal 'fi~cG DL.R IttilQlgh Regional'bf~ce USAGE Raleigh Field pace Ccratral Files 1+ile copy Steve Mitchell, 18X1 LgncasCer I7z'., t3arr+cx, NC 2752.9 NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM GRASSED SWALE SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Pa-t III) must also be filled out, printed and submitted along with all of the required information. PROJECT I FORMATION Project name WOODS OF BLAIR HILLS Contact name JACK LICHNER Phone number 669346 Date December 19, 2007 Drainage area number IL DESIGN: lNFE~'tMATION Site Characteristics Drainage area 79,715 ft Impervious area 8,050 ft Percent impervious 10.1 Design rainfall depth 1.0 inch Peak Flow Calculations 10-yr, 24-hr runoff depth 5.38 in 10-yr, 24-hr intensity P l t 10 24 h k fl t d 0.22 i 3/hr 0 282 ~~` o ~w ~ Q _ ~~ ~ eve opmen -yr, - r pea ow os - . ft /sec '1~~7•2~ ~~-83) ~ Velocity . Q ~o, Maximum non-erosive velocity (peak 10-year storm) " " 5.5 ft/sec ~ , ~ : 9.25 ~s Soil characteristics (enter x below) Sand/silt (easily erodible) Clay mix (erosion resistant) " " X w1 A "~ "t'"~4 5 r=Q - ~ ~~o' 2•SS fps Grass Type (enter below) x Bermuda Tall fescue X Bahiagrass D(LA i.dA 4 E A aJF~ ~~ Kentucky bluegrass pc t c N ~A Grass-legume mixture ~2o.6DW~ D , Zl,. ,a-~. Swale type: Fill out one of the options below: q Nn SSW Oation 1: Curb Outlet Swale: (Y or N) " ~FF's'T t~ o . 88 4 c Maximum velocity . Tc 5ovt~ Side slopes :1 Swale length ft - opFsrt4s Oation 2: Conveyance Swale, Seekin4 Pollutant Credit: (Y or N) .ro t„ ~ ~f = O, 6 Q q ~ Maximum velocity for 10-yr storm ft/sec Side slopes :1 Swale length ft ~• 8 3 Ta>4~ v, a - O~tion 3: Conveyance Swale, Not Seeking Pollutant Credit: YES (Y or N) Maximum velocity 2.6 OK _ F'oR. vF'f'sr7E ?a Side slopes 3 :1 OK ACGOU.11 ~~ F'(~Tv Ot~/Et..~P h~'l us£ ~ . O. (07' '- t~~vwA~ c,sE C ~ O.cjO w~~4NT~o L~ 0.70 Form SW401-Grassed Swale-Rev.2 Parts I and II. Project Design Summary, Page 1 of 2 Permit Number: Ito be provided by DWOI oa0p W A T~c9OG ~ y a 'Sw~Characteristics Swale Shape: Enter an "x" in the appropriate cell below: Trapezoidal Parabolic V-shaped Width of the bottom of the swale Width of the top of the Swale Maintenance agreement: Is this included in the application? This design is for the following design option: Option 1: Curb outlet Swale Option 2: Conveyance swale, seeking pollutant credit Option 3: Conveyance Swale, not seeking pollutant credit Additional Information Is the swale sized for all runoff from ultimate build-out? Is the BMP located in a recorded drainage easement with a recorded access easement to a public Right of Way (ROW)? What is the distance from the bottom of the swale to the SHWT? What is the ground level elevation? What is the elevation of the bottom of the Swale? What is the SHWT elevation? What is the longitudinal slope of the Swale? What is the depth of freeboard? X 3 ft 15 ft N/A (Y or N) N N N YES OK YES (Y or N) OK 0.0 ft _ fmsl _ fmsl fmsl 1.0 % OK 1.3ft OK Permit Number: (to be provided by DWQ) Form SW401-Grassed Swale-Rev.2 Parts I and II. Project Design Summary, Page 2 of 2 PER THE BMP MANUAL AND THE SUPPLEMENT FORM, IF THE GRASS SWALE IS NOT BEING USED FOR CREDIT THEN THE INSPECTION AND MAINTENANCE AGREEMENT IS NOT REQUIRED. HOWEVER, I WAS TOLD TO SUPPLY ONE. ATTACHED IS A COPY. PLEASE NOTE THAT THE SWALE IS NOT A BMP. THE DEVELOPMENT IS BELOW THE 3.6 LBS/AC/YR IN NITROGEN RUNOFF AND THEREFORE, NO BMP IS NEEDED TO REDUCE NITROGEN. THIS SWALE IS TO ONLY CONVEY RUNOFF FROM THE ROADWAY AWAY FROM A DIRECT DISCHAGR INTO THE NEUSE RIVER BUFFER. THOMPSON & ASSOCIATES, P.A. 19 ENGINEERING ~ SURVEYING ~ LAND PLANNING Permit Name: (to be provided by DWQ~ Drainage Area Number: Grassed Swale Inspection and Maintenance Agreement GiRASS i~1T~1~ I will keep a maintenance record on this lil'~P. This maintenance record will be kept in a a~R~M» o.t ~.'1 log in a known set location. Any deficient + elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, f the G?RA~S D ~'tGl~ Important maintenance procedures: - The drainage area of the grassed swale will be carefully managed to reduce the sediment load to the grassed Swale. - After the first-time fertilization to establish the grass in the swale, fertilizer will not be applied to the grassed Swale. The grassed swale will be inspected once a quarter. Records of inspection and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential roblem: How I will remediate the roblem: The entire length of the Trash/debris is present. Remove the trash/debris. swale Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then re-sod (or plant with other appropriate species) and water until established. Provide lime and aone-time fertilizer a lication. Sediment covers the grass at Remove sediment and dispose in an the bottom of the swale. area that will not impact streams or BMPs. Re-sod if necessar . Vegetation is too short or too Maintain vegetation at a height of lon a roximatel six inches. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. Form SW401-Grassed Swale I&M-Rev.2 Page 1 of 2 Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name: Woo~S p F ALA i R.- N ~L.~,S BMP drainage area number: Print name: .J~ G1~ 1, ~ t, N-r..~ ~L, Title: ~~2~c-tcR- ~ -~./~LcemE,..t-~ _ Fc- ~F~~i.cPrnf,.tT Address: ~3 ~'1 S, ,~, ~c2 ~c) ~7 . S~; ~ ~ a G3 . ~~c~ - ~ Ll ,J (. fit, - Phone: ~ ~4 - Signature: Date: Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I, ~Ac1,C C . Q ~ Jev`~t(-k ~ , a Notary Public for the State of ~~ ~^ Ca ru[; ~ ,County of ~ a ~ ~ , do hereby certify that Joy ck L i ~ I~ + ~ ~ r personally appeared before me this ,2 !7 day of~i~ecew•b e l , d00 ,and acknowledge the due execution of the forgoing grassed Swale maintenance requirements. Witness my hand and official seal, G: RIVEgI~ ~ ?oT~ ~ws ~~~ v~~~a coup SEAL My commission expires, ,,ui ~~"~-~-~Dflg Form SW401-Grassed Swale I&M-Rev.2 Page 2 of 2 Exhibit A WOODS OF BLAIR HILLS Inspection, Operations & Maintenance Form For Grassed Swale Date: Time: Weather Conditions: Location of swale: Grass Cover• T e of Observation: e. .sediment, voided areas, rills, trash, uddles,... Action: (e.g. re air, monitor, investi ate) THOMPSON & ASSOCIATES, P.A. 14 ENGINEERING ~ SURVEYING ~ LAND PLANNING -~- ~ 3x1sy `~ 7 ~ , r ~' ' , ~.. ~.. J __~`_. ~. ~~ III _ ~' ~ 9~, L 7 ~)1 ~1 N~ O~ tt s ~' ~ ~ ~~~ s, t~ i ~ ~2 1 _ ! ~ / C 1 r e~ t ~~ ~' '~{~~,' 7 /~ 1 ~ RECaRDED IN BOOK OF MAPS 2006, PAGE ~Y - N 83'3 j ~ i / ~ ~ : I ~ / - ~ . l / ~ / . , / . /. ~ ' ' ,~, ` CL3RV~ ?ABLE OURYr: I7&'.LTA €iA[3€F3$ LENG7N ~ €3€REC7':{1t~ s.~tc;RO C7 453%'x7" ??x.OQ' 2T8.£t2' N 33'S?'44" f :13,28' a ~~ ,~ ~ I _..-...._.... LINf YABS.E ._..._.. ._.._.. ~_._._.__._.......s.._,._.____...~ ' h : i.NE BEARING CsiSTANCf „ I Lt N iD'22'{35' f 'C.2{3' ~~ '1 „4 ti 42'3x';9' f 145.3"<' ~ i ... : a _~ N B4 %"21" E 8.9w' ~ .' L6 N ?B'37'GS" E '762.62'€ / .7 _.........._._._ N 87'43'27" f _ 7a.9&'{ .............__._._~~.v.._.._~.__ _._._.___.___... \ L':0 N 49'73'Clfi" f 28,82'`= ~ L71 ~ 75'3 '4G" E 2v,97`~ Lw2 5 33'D7'23" E t7:6s~€ ._.__. / L74 ti 6830'23' f 28.87' ?-g &x'28'42" E 5 ?~ ~' / __ I.78 _....._._ . __.__._.. _ S 79 9'x7" N' E7.ih3` ~ L':? t 40'03`53' iti BC,fX1' ~~~ L78 8 23"7'24' W SO.DEt' .~ Permit No: (to be assigned by DWQ) NI. REQUIRED IT1=l~S CHECK~,IST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Initials RLM RLM RLM Pagel Plan Sheet No. 1,3,5-7 1. Plans (1" + 50' or larger) of the entire site showing: - Design at ultimate build-out, - Off-site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), -Swale dimensions (width, length, depth), - Maintenance access, - Recorded drainage easement and public right of way (ROW), -Grass species, and - Boundaries of drainage easement. 1,3,5-7 2. Plan details (1" = 50' or larger) for the grassed swale showing: - Swale dimensions (width, length, depth), -Maintenance access, - Recorded drainage easement and public right of way (ROW), - Design at ultimate build-out, -Grass species, - Off-site drainage (if applicable),and -Boundaries of drainage easement. 3 & 6 3. Section view of the grassed swale (1" = 20' or larger) showing: -Side slopes, - Longitudinal slope, -Freeboard -Swale dimensions, and - SHWT level(s) RLM 3 & 6 RLM AS BUILTS F o p_r~ ~TY,p~u efl RLM RLM 3 & 6 N/A N/A a IA N Ik 4. Supporting calculations (including maximum velocity calculations for applicable storms) 5. An assurance that the installed system will meet design specifications upon initial operation once the project is complete and the entire drainage area is stabilized. 6. A construction sequence that shows how the bioretention cell will be protected from sediment until the entire drainage area is stabilized. 7. The supporting calculations (including underdrain calculations, if applicable). 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement. 9. A copy of the deed restriction. SW401-Grassed Swale-Rev.2 Part III, Page 1 of 1 ~,.-OODS off' bLA ~ ~ --~ ~~~.s AS-BUILT DRAWING GRASS SWALE ~~ AS- BUILT LENGTH I.f. AS- BUILT Q10 = cfs AS- BUILT V10 = fps AS- BUILT D10 = ft. AS- BUILT BASE = ft AS- BUILT SLOPE _ n = 0.035 TOP WIDTH = DITCH LINED WITH: AS-BUILT ~ DEPTH = ft : ~ AS-BUILT BASE = ft