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HomeMy WebLinkAbout20000251 Ver 1_COMPLETE FILE_20000211Vice Chancellor for Finance and Business Date 4- I 1 Q TO: PLEASE: Office of Finance and Business Campus Box 7201 / B Holladay Hall Raleigh, North Carolina 27695-7201 919.515.2155 (phone) 919.515.5121 (fax) george_worsleygncsu.edu FOR YOUR: _ Handle _ Immediate Action Note and Return _ Information Reply and send me a copy Review and Approval Prepare reply for signature _ File Send me information required _ Comments and suggestions Advise status _ Signature Respond by _- .. i-WETLANp" „r,gTFr' ' J OL,. Memorandum To From: Subject: ern NCDENR DIVISION OF WATER QUALITY April 12, 2000 John Domey Todd St. John Centennial Middl School Wake County DWQ# 980033 (981239,000251) 7-Ti b,S 1r,3 t? I TY Please find the attached plans for the extended wet detention wetland and vegetative swale/berm structures for treating stormwater at the Centennial Middle School. It is my understanding that, eventually, the berm structures will be replaced with an extended wet detention pond or wetland after the watershed draining to the berms becomes developed. The plans dated March 10, 2000 appear to be adequate except for the planting of Elodea canadensis. Steve Kroeger recommended that the applicant plant Valisneria americana instead. As such, I recommend that the plans be approved with the above caveat. Project No. DWQ Project Name: Centennial Middle School SUBMITTED DESIGN: REQUIRED DESIGN: elevations Bottom of Basin (ft) 343 Permanent Pool (ft) 346 3 ft. depth Temporary Pool (ft) 347.75 1.75 ft. depth areas Permanent Pool SA (sq ft) 13652 13153 sq. ft. Drainage Area (ac) 22.53 Impervious Area (ac) 6.76 30.0 % volumes Permanent Pool (cu ft) 0 Temporary Pool (cu ft) 26174 26174 cu. ft. Forebay (cu ft) 0 #DIV/0! % other parameters SA/DA 0 1.34 Orifice Diameter (in) 0.22 cfs drawdown Design Rainfall (in) 1 X16y drawdown 3/t Linear Interpolation of Correct SAIDA*** % Impervious Next Lowest 30 Project Impervious 30.0 Next Highest 40 3 ft. Permanent Pool Depth SA/DA from Table 1.34 1.34 1.73 status ok ok ok check tempc #DIV/0! check drawe Al. -a r' State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Bill Holman, Secretary Kerr T. Stevens, Director Mr. George Worsley Office of Finance and Business Campus Box 7201/13 Holladay Hall Raleigh, NC 27695 Dear Mr. Worsley: LT.R;TA 'T4 NCDENR DIVISION OF WATER QUALITY October 8, 1999 Subject: Stormwater Management Plan Centennial Middle School Wake County, NC DWQ# 980033 This Office is in receipt of the plans dated September 13, 1999 for the stormwater management wetlaryd and weir struc es at s bject cility prepared on your behalf by McEvoy Engmeeryng and submitt d t the rvisi n o September 27, 1999. It is the understanding of is Office that e xte ed wet de ntion wetland (SCUT 1) is adequately sized to treat the rainage area s own. It i also the nderstanding of this Office the weir structures will e ritually be r laced by properly sized and designed pond or wetland at a later date. As such, thi Office ' l allow the impacts to the stream and buffer above SCUT 1 to be conducted as long agree to obtain final approval for the stormwater management plan and construct and operate the stormwater management devices per that plan before any of the school buildings are occupied. If you have any questions regarding this matter, please contact Mr. Todd St. John at (919) 733-9584. Sincerely, John R. Dorney Wetlands Unit Supervisor cc: Mr. Todd St. John, Wetlands Unit Raleigh Regional Office File 4401 Reedy Creek Road, Raleigh, NC 27607 Telephone 919-733-1896 FAX 919-733-9959 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-consumer paper North Carolina Stoto (Jniveisity is a land- grmt university and a constituent institution 'fit sr ' JC) I N of The University of North Carolina An Equal Opportunity/Affirmative Action Employer Office of Finance and Business Business Division Environmental Health & Safety Center Campus Box 8007 Raleigh, North Carolina 27695-8007 http://www2.ncsu.edu/ncsu/ehs/ Director 919.515.4238 Environmental Affairs 919.515.6859 April 1], 2000 Industrial Hygiene 919.515.6860 - ° Health and Safety 919.515.6858 John Dorney Radiation Protection 919.515.2894 (Fax) 919.515.6307 NCDENR DWQ 4401 Reedy Creek Road Raleigh, NC 27607 References: WETLANES GitOUN 'MATER 0W.1.11Y SECTION 1. Letter from John R. Dorney to George Worsley, "Stormwater Management Plan, Centennial Campus Middle School, Wake County, NC, DWQ# 980033." October 8, 1999. 2. Letter from Kevin C. Martin, Soil & Environmental Consultants, to US Army Corps of Engineers - Regulatory, Attn: Mr. Todd Tugwell and NCDENR - DWQ Attn: Mr. John Dorney, "Nationwide Permit/401 Water Quality Certification Request, Centennial Campus Magnet Middle School, Corps Action ID 199820433 / DWQ ID 980033." February 11, 2000. Dear Mr. Dorney This is to provide the stormwater management plan design for your review, as required by Reference 1. Reference 2 provided the 401 Certification and 404 Permit applications for this action. In order to meet the requirement in Reference 1 for the stormwater management devices to be constructed and in operation before the school buildings are occupied, construction of the pond must begin by late April. Bids for performing this work will be received by Wake County Public School System in mid April. The School System will be proceeding with this schedule, unless we hear from you to the contrary. Also provided is the signed, "Maintenance and Operational Procedures Centennial Campus Extended Detention Wetland #1." If you have any questions on this, please contact Duane Knudson (515-6859). Sincer ly, Dua e Knudson Environmental Affairs Manager Enclosures: Plan drawings. Material/workmanship specifications. Maintenance and Operational Procedure. Design calculations. Sedimentation and Erosion Control Plan approval. cc: Alex Fuller, Wake County Schools 10 McEvoy Engineering Services, Inc. Centennial Campus Middle School Water Quality Control Devices Extended Detention Wetland #1 Raleigh, N.C. Design Calculations Prepared for: North Carolina State University Construction Contact: Wake County Public School System 1551 Rock Quarry Road Raleigh, N.C. 27610 Attn: Mr. Alex Fuller Ofc: (919) 856 8243 Prepared by: McEvoy Engineering Services, Inc. 5510 Munford Road P.O. Box 30965 Raleigh, N. C. 27622 Ofc: (919) 783 5303 Fax: (919) 783 5999 ANpS 015ECTION . o• 1N 11114,1, At. Steven M. McEvoy, P.E. WPSCVCAL.XLS 5510 Munford Road • P.O. Box 30965 • Raleigh, N.C. 27622 • (919) 783-5303 Fax: (919) 783-5999 H d Cf C 'C d d C C W A W V d t Y L O N C C O ? = C d ? Cl o d L ? v C d c ? F' W X W W h 4 ¢ , o.°' a v ? U V ? To ' z ' Z C C ? a L ? p? ? •? fr 3 C d IX Q LU Z O m ? a0 j o ca ca N cu 0 ? C C c 0 3 0 o co N m Q 4(1) p C a a) (1) o CO m ca a) m M M - W M 00 moo 7 U :3 7 C C C C - U _ m C 4) E O "a 4: W ?- V N f? 02 0 co o c0 4- 6 04 LO LO p C M ? r r C U Cal U co 4? C a) _ .6a C N a +- c N CL 42 c X 0 11- I-R 0 0 0 0 0 0 o?° 0 0 o 0 0 N 0 `- CO p p r- p ? C cN m a c 06 N li N C C 0 O N` O O cu w 0 Q w 0 0 z a) 0_ - aa)) 0 = 0 CL 00 00 m w Z 0 a a ¢ c 4-- -6 a o E ? w C L c n in U V a C a) E t0 C N a) m 3 0 a) rn N d m H a) a) 1n a) l a) cu ca MICh O O ca m Q? a> (D O O 1L a) _ Q a) U Cl) J cn ? >. O m a) LO t` CL O IT E ` M - N o C N N 0 C co o ? cu +v`o 0 oCU rnco ° '? 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(D cUi r in f r M ui r 04 ( r 0 r 0 r 0 r t - C6 r O r ? N o o to 1- 0 Lo 0 0 M r- I,.- rl_ co co O O 7 > C OD O 0 0 N O?0 co a? coo CL co J x w CL G State of North Carolina Department of Environment and Natural Resources Raleigh Regional Office James B. Hunt, Jr., Governor Bill Holman, Secretary 0 A f NCDENR'a Nam" CAW"m ? Depiir"mw ErmnoNMarr Awo NM RA,L RE-wof or- s DIVISION OF LAND RESOURCES March 8, 2000 Wake Coy Public Schools 1551 Rock Quarry Rd. Raleigh, N. C. 27610 Attn: Alex Fuller RE: Letter of Approval Project Name: Centennial Middle School Location: Wake Co. Submitted by: McEvoy Engineering Date Received: 2-22-00 Date Processing Initiated: 2-22-00 Watershed: Neuse # 1 / 03-04-02 New Submittal (X) Revised () Dear Mr. Fuller: This office has reviewed the subject Erosion and Sedimentation Control Plan. We find the plan to be acceptable and hereby issue this letter of approval. If any modifications, performance reservations, or recommendations are applicable, a list is enclosed and is incorporated as a part of this letter of approval. If any modifications are not incorporated into the plan and implemented in the field, the site will be in violation of the Sedimentation Pollution Control Act of 1973 (North Carolina General Statute, hereinafter NCGS, 113A-61.1). In addition, it should be noted that this plan approval shall expire three (3) years following the date of approval in accordance with Title 15A, North Carolina Administrative Code (NCAC) 4B.0029, if no land-disturbing activity has been undertaken. The land-disturbing activity described in the plan for this site may be subject to the approval of other Local, State or Federal agencies. This could include the Division of Water Quality under stormwater or other water quality regulations, the U.S. Army Corps of Engineers under Article 404 jurisdiction, county, city or town agencies under other local ordinances, or other approvals that may be required. The approval issued in this letter cannot supersede any other required permit or approval. Mailing Address: 1628 Mail Service Center, Raleigh, NC 27699-1628 Phone: (919)571-4700 Location: 3800 Barrett Drive FAX, r4ia%s7, .-7,0 001?? Mr. Fuller Page 2 March 8, 2000 Due to the location of this project, the Neuse R ve? Basin becameteffect ve on J ya22a? 997 existing buffers along watercourses NCAC 2B .023 The Neuse River Riparian Area Protection and Maintenance and esRu le (15n the Neuse R ve3) applies to all perennial and intermittent streams, lakes, ponds with forest vegetation on the adjacent land adjacent to the streampthe rule p ohib is landng forest vegetation in the first 30 feet directly disturbance, new development and fertilizer use within the first 50 feet of land next to the water. In riparian areas with forest vegetation that is less than 30 feet wide, the rule prohibits land disturbance, new development and fertilizer use within the area that contains forest vegetation on about (but not the entire 50 foot of Water Quality's We informatiUnit at 919-733-1786, area rule, please contact the Division Please be advised that Title 15A, North Carolina Administrative Code, 4B .0018(a) requires that a copy of the approved plan be on file at the job site. Also, please consider this letter as notice in accordance with the requirements of NCGS 113A-61.1 concerning our right to perform periodic inspections to ensure compliance with the approved plan. North Carolina's sedimentation pollution control program is performance oriented, requiring protection of the natural resources and adjoining properties. If at any time during this project it is determined that the Erosion arid Sedimentation Control Plan is inadequate to meet the .requirements of the Sedimentation Pollution Control Act of 1973 (NCGS 113A-51 through 66), this office may require revisions in the plan and its implementation to ensure compliance with the Act. Please note that this approval is based in part on the accuracy of the information provided concerning financial responsibility. You are requested to file an amended Financial Responsibility Form if any changes become necessary. In addition, it would be helpful if you would notify this office of the proposed starting date for the activity at the subject site. Your cooperation is eas!3 do not h sitaee to contact this office at 9191571-4700$ project. If there are any questions, p Sincerely, vWyatt Brown Land Quality Section Raleigh Regional Office WB:pjc cc: Steve McEvoy, P.E., McEvoy Engineering Services Ken Schuster, P.E., Water Quality MAINTENANCE AND OPERATIONAL PROCEDURES CENTENNIAL CAMPUS EXTENDED DETENTION WETLAND #1 GENERAL OVERVIEW: The subject facility is located just off the southeast corner of the lot containing Centennial Campus Middle School on the east side of Main Campus Drive. The facility consists of the following basic components: (1.) an earthen embankment (top elevation 350 ft. MSL) approximately 300 feet in length, (2.) an unlined, grassed emergency spillway off the southern end of the embankment approximately 27 feet wide, (3.) a principal spillway system with approximately 47 linear feet of 36-inch RCP and a formed concrete riser inlet structure, and (4.) a reservoir area approximately 13,652 square feet in size at normal pool elevation 346 ft. MSL partitioned into three distinct areas: (a.) an aftbay area, approximately 2,411 square feet in surface area at elevation 346 ft. MSL, directly adjacent to the principal spillway riser structure which is by design devoid of vegetation, (b.) a wetland planting area, approximately 9,552 square feet in surface area at elevation 346 ft. MSL, which contains wetlands vegetation, and (c.) a riprap lined forebay area, approximately 1,689 square feet in surface area at elevation 346 ft. MSL, which functions as an entry/dissipation pool for the facility. FACILITY FUNCTION: This basic design function of the facility is to detain runoff from a one inch rainfall within the watershed draining the principal spillway system for an extended period of time (76 hours) in order to allow suspended solids and pollutants carried by the runoff to settle out and be removed by the complex micro topography established as a result of specialized wetlands planting within the reservoir area. The riser structure functions as an uncontrolled, multi-level reservoir inlet/outflow structure. The 2-inch orifice tube with invert at 346 ft. MSL restricts outflow from the one inch rainfall which fills the reservoir to elevation 347.75 ft. MSL. In order to protect the embankment from erosive overflow, reservoir waters are allowed to freely flow over the walls of the riser structure at elevation 347.75 ft. MSL for increased outflow rate and outflow rate is further increased by allowing reservoir waters which rise to elevation 348.75 ft. MSL to also flow through the emergency spillway. MAINTENANCE PROCEDURES: Maintenance of Earthen Embankment A. The earthen embankment shall at all times maintain a thick, healthy grass cover which is free of brush. This type of cover, if properly maintained, will prevent erosion of the embankment and provide an easy surface for inspection. Page 1 Maintenance and Operational Procedures Centennial Campus Extended Detention Wetlands #1 B. Grass mowing, brush cutting, and removal of weed vegetation will be necessary to the proper maintenance of the embankment. The embankment slopes and emergency spillway area shall be mowed when the grass exceeds twelve inches (12") in height. Acceptable methods include use of mowers, power brush cutters and weed whips. C. Trees and other unwanted woody vegetation shall not be allowed to grow on the earthen embankment. Any vegetation which inhibits proper operation of the facility shall be removed. D. All erosion gullies which form shall be repaired. E. The embankment, including areas at least twenty feet beyond the downstream toe of the embankment, shall be inspected for excessive seepage annually. This inspection can coincide with mowing and other maintenance activities. Seepage may vary from a soft, wet area to flowing water. F. During the regular annual inspection, the entire embankment shall also be inspected for cracks. There are two major types of potential, serious cracks which may lead to embankment failure and total loss of reservoir: Traverse Cracks: Traverse cracks appear crossing perpendicular to the embankment top centerline and indicate differential settlement within the embankment or its foundation. Any area of the embankment experiencing excessive settlement (greater than four inches (4") between the two sides of the crack) must have the settlement source identified and repaired; and the embankment must be restored to original elevation. Longitudinal Cracks: Longitudinal cracks run parallel to the centerline of the embankment and may indicate early signs of a slope or "slide" failure. Arch shaped cracks are an indication that a localized slope failure is taking place and progressing. Once slope failures take place and complete their movement, a vertical soil wall may be left which may slough off an allow severe embankment erosion into the reservoir area. In the event excessive seepage or significant cracks are observed during periodic inspections or at any time, repair plans should be prepared and carried out immediately. Page 2 AP win Ar! t?rArER r?lt,^ Maintenance and Operational Procedures Centennial Campus Extended Detention Wetlands #1 2. Maintenance of Emergency Spillway Area: A. The emergency spillway area should be kept free of debris and mowed as the embankment. B. All erosion gullies which form between maintenance operations shall be backfilled with topsoil material, re-seeded and mulched properly until new vegetation is established. C. Trees and other unwanted woody vegetation shall not be allowed to grow in the emergency spillway area. Any vegetation which inhibits flow through the spillway area shall be removed. Maintenance of Principal Spillway System: A. The two inch (2") orifice tube and the riser structure overflow walls shall be kept free of debris. The two inch orifice tube shall be rodded annually and anytime the reservoir level remains above elevation 346 MSL during periods when no rainfall is experienced at the site. B. The six inch (6") bottom drain valve shall be exercised during the regular annual inspection and the bottom drain inlet shall be kept free of mud and debris, always allowing free flow through the inlet. C. All concrete portions of the system shall be inspected during the regular annual inspection for signs of cracking or deteriorization. Minor needed repairs shall be made immediately upon notice of damage. Also during the regular annual inspection, the interior of the 36 inch RCP conduit shall be inspected for signs of damage, leakage and/or misalignment. Should any such signs occur or significant deterioration of other spillway components be noticed, repair plans should be prepared and carried out immediately. The spillway conduit shall be kept clear of debris and shall not be allowed to serve as permanent shelter for animals which may introduce such debris. 4. Maintenance of Wetland Planting Area of Reservoir: A. The wetland planting area of the reservoir shall be kept clear of debris and shall be kept clear of accumulating sediments by removal of such sediments if necessary. Page 3 Maintenance and Operational Procedures Centennial Campus Extended Detention Wetlands #1 B. Once the initial planting of wetlands plants have become established (after the one year contractor's warranty), the wetland planting area of the reservoir shall be allowed to experience natural wetlands plant replacement and proliferation. Should vegetation which prevents the natural proliferation of plants indigenous to wetland environments become established in the reservoir area, such plants will be carefully removed so as not to harm adjacent wetlands plants. Maintenance of Forebay Area: A. Accumulated sediments within the forebay area shall be removed as needed. B. The two 12 inch RCP pipes which assist in drainage of the forebay shall be inspected just as concrete components of the principal spillway system and on the same schedule. 6. Inspection Documentation: Records shall be kept for all inspections, observed conditions, and maintenance activities. Such records shall contain the following headings as a minimum: Person Performing the Inspection or Maintenance Procedure: Date of Inspection or Maintenance Procedure: Inspection Observations and Notes: Maintenance Performed: END PROCEDURES -------- ---- George Worsley Vice Chancellor Finance and Business ---1----=- =S 00 - Date Page 4 State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Bill Holman, Secretary Kerr T. Stevens, Director Mr. George Worsley 1 • NC ENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES April 11, 2000 Wake County DWQ Project #: 000251 APPROVAL OF 401Quality Certification and ADDITIONAL CONDITIONS and Neuse River Buffer Rules NCSU-Real Estates Services Post Office Box 7201 Raleigh, NC 27695-7201 Dear Mr. Worsley: You have our approval, in accordance with the attached conditions and those listed below, to place fill material in 148 linear feet of streams for the purpose of constructing a road at Centennial Campus Middle School at NCSU Centennial Campus, as you described in your application dated February 11, 2000. After reviewing your application, we have decided that this fill is covered by General Water Quality Certification Number 3108. This certification allows you to use Nationwide Permit Number 26 when the Corps of Engineers issues it. This approval is also valid for the Neuse River buffer rules (15A NCAC 2B .033). 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, Coastal Stonmwater, Non-Discharge and Water Supply Watershed regulations. This approval will expire when the accompanying 404 or CAMA 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 except as modified below. If you change your project, you must notify us and you may be required to send us a new application.. If the property is sold, the new owner must be given a copy of this 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) (6) and (7). This approval shall expire when the corresponding Nationwide Permit expires or as otherwise provided in the General Certification. For this approval to be valid, you must follow the conditions listed in the attached certification and any additional conditions listed below. 1. A additional condition is that a final, written stormwater management for stormwater runoff using a constructed wetland as outlined in the September 27, 1999 plan submitted to DWQ from this project shall be approved by this Office before the impacts specified in this Certification occur. The stormwater management plan must include plans and specifications for stormwater management facilities designed to remove 85% TSS according to the most recent version of the NC DENR Stormwater Best Management Practices Manual. 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, P.O. Box 27447, Raleigh, N.C. 27611-7447. 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 John Domey at 919-733-9646. Je erely, e . St yens Attachment cc: Corps of Engineers Raleigh Field Office Raleigh DWQ Regional Office Kevin Martin; Soil & Environmental Consultants Raleigh Division of Land Resources File copy Central Files Division of Water Quality - Non-Discharge Branch 1621 Mail Service Center Raleigh NC 27669-1621 Telephone 919-733-1786 FAX # 733-9959 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post consumer paper w ra. r Soil & Environmental Consultants. dc. 244 West Millbrook Road • Raleigh, North Carolina 27609 • Phone: (919) 846-5900 • Fax:I19?494?? Web Page: www.SandEC.com February 11, 2000 O o ? ? Job #2990 US Army Corps of Engineers - Regulatory NCDENR - DWQ Attn: Mr. Todd Tugwell Attn: Mr. John Dorney 6508 Falls of the Neuse Road PAYMENT 4401 Reedy Creek Road Suite 120 Raleigh, NC 27607 Raleigh, NC 27615 RECEIVED , Re: Nationwide Permit/401 Water Quality Certification Request Centennial Campus Magnet Middle School Corps Action ID 199820433/ DWQ ID 980033 tQ?? Dear Mr. Tugwell & Mr. Dorney: The purpose of this letter is to request Nationwide Permit (NWP) 26 for the project 'known as Centennial Campus Magnet Middle School. The project is located on NCSU Centennial Campus (Wake County). The site is shown on the attached USGS topographic quadrangle vicinity map and plans. NWPs 12, 14, and 33 were previously issued for this project on March 4, 1998. Project plans were revised and a new authorization was issued for the use of NWP 12 on January 29, 1999. The new NWP 12 authorization replaced the previous one and nullified the authorizations for NWPs 14 and 33. Construction impacts covered under NWP 12 have been completed. Authorization to use NWP 26 is requested to cover impacts associated with construction of the permanent access road previously authorized but later withdrawn. Based on our conversations, we understand this impact must be covered under NWP 26 because NWP 14 has already been utilized elsewhere on the site. Approximately 148 linear feet of unimportant/insignificant channel will be impacted by the permanent access road. This impact includes the culvert plus the energy dissipater located at the downstream end of the culvert. As a condition of the 401 Water Quality Certification for the aforementioned authorizations, NCDENR - DWQ requested the applicant incorporate a wet detention pond into the facility's stormwater management plan. Authorization to use NWP 26 for construction of this pond is also requested. Construction of the pond will impact approximately 177 feet of unimportant/insignificant intermittent channel by excavation/flooding. Locating the pond upstream of an existing culvert minimized Wetland Delineation/Permitting/Mitigation Soil/Site Evaluations On-Site Septic Systems Environmental Assessments/Audits Neuse Basin and Watershed Buffer Evaluations Groundwater Hydrology Endangered Species Branch Office: 25 North College Avenue • Newton, NC 28658 • Phone: (828) 466-7404 • Fax: (828) 466-7406 impacts to the channel. These impacts were calculated based on plans dated September 13, 1999 and approved by NCDENR - DWQ in a letter to the applicant dated October 8, 1999 (Copy attached). Please note that McEvoy Engineering designed the pond and may be contacted directly for supporting calculations, if required (Telephone # 919/783-5303). Site plan sheets (L & M) showing the additional impacts to jurisdictional areas are attached. Impacts to wetlands have been avoided. Additional project impacts to waters of the U. S. total approximately 0.0275 acre. The proposed wet detention pond will create approximately 0.35 acre of jurisdictional area. It is also important to note that the pond impacts are necessitated by the desire to improve/protect water quality and a portion of the impacts was previously authorized without mitigation (i.e. the access road). Based on these considerations, the low quality of the channel impacted, and because the total jurisdictional area will be increased by the project as proposed, we do not believe any mitigation beyond construction of the pond should be required. Current DWQ criteria for impacts to areas subject to Neuse River Riparian Buffer Rules do not require mitigation for impacts due to ponds if the buffer is re-established around the pond or for road crossings that impact equal to or less than 150 linear feet or 1/3 of an acre of riparian buffer. The access road crossing as proposed does not exceed either threshold for mitigation. The applicant plans to maintain a 50-foot buffer around the entire pond area with the exception of the area adjacent to the permanent access road. As the pond itself is designed to treat stormwater runoff from the facility, Neuse Buffer mitigation should also not be required. Please contact us if you have any questions or would like to schedule a site visit, if required. Sincerely, Kevin C. Martin President KCM/j ab Attachment DWQ ID: 980033 Corps Action ID: 199820433 Nationwide Permit Requested (Provide Nationwide Permit ft 26 Pre-Construction Notification Appliion For Nationwide Permits that Require: 1) Notification to the Corps of Engineers i 2) Application for Section 401 Certification 3) Coordination with the NC Division of Coastal Management Send the original and (1) copy of this completed form to the appropriate field office of the Corps of Engineers (see agency addresses sheet). Seven (7) copies should be sent to the NC Division of Environmental Management (see agency addresses sheet). PLEASE PRINT. 1. Owner's Name: NCSU - Real Estates Services 2. Mailing Address: Attn: George Worsley, V. Chancellor of Finance & Business Box 7201 Subdivision Name: Centennial Campus City: Raleigh State: NC Zip Code: 27695-7201 Project location address, including subdivision name (if different from mailing address above): Within Centennial Campus approximately 0.4 miles southwest of Lake Raleigh and east of SR 1348 3) Telephone Number (Home): (Work): (919)515-3235 4) If applicable, , address, phone number: of Enviornmental Consultant Soil & Environmental Consultants, Inc. Phone: (919) 846-5900 244 West Millbrook Road Fax: (919) 846-9467 Raleigh, NC 27609 5. Location of work (provide a map, preferable a copy of USGS topographic map or aerial photograph with scale): County: Wake Nearest town or city: Raleigh Specific Location (include road numbers, landmarks, etc.): Within Centennial Campus, approximately 0.4 mile southwest of Lake Raleigh and east of SR 1348 (See attached map) 6. Impacted or nearest stream/ river: Unnamed tributary of Walnut Creek River Basin: N use 7a, Is project located near water classified as trout, tidal saltwater (SA), high quality waters (HQW), outstanding resource waters (ORW), water supply (WS-I or WS- II)? YES ? NO ® If yes, explain: 7b. If the project is located within a North Carolina division of coastal management area of environmental concern (AEC)? YES ? NO 7c If the project is located within a coastal county (see page 7 for list of coastal counties), what is the land use plan (LUP) designation? 8a. Have any Section 404 permits been previously requested for use on this property? YES ® NO ? If yes, provide Action ID number of pervious permit and any additional information (including photocopy of 401 certification). Corps Action ID #199820433/DWQ ID #980033 8b. Are additional permit requests expected for this property in the future? YES ® NO ? If yes, describe anticipated work: Currently there are no specific project plans for the remainder of the tract. 9a. Estimated total number of acres in tract of land: Unknown 9b. Estimated total number or acres of wetlands located on project site: Unknown <1/3 acre present on middle school site. I Oa. Number of acres of wetlands impacted by the proposed project by: Filling: 0.0125 Flooding: 0.0150 Drainage: Excavation: Other: Total acres to be impacted: 0.0275 10b. (1) Stream channel to be impacted by the proposed project (if relocated, provide distance both before and after relocation): Length before: 325 ft After: NA Width Before (based on normal high water contours): 3.7 ft Width After: NA Average depth before: NA After: NA (2) Stream channel impacts will result from: (check all that apply) Open channel relocation: ? Placement of pipe in channel: ? Channel Excavation: ? Construction of a Dam/Flooding: Other: Culvert Placement 11. If construction of a pond is proposed, what is the size of the watershed draining to the pond? 22.53 acres What is the expected pond surface area? 0,35 acre 12. Description of proposed work including discussion of type of mechanical equipment to be used (attach plans 8 1/2" x 11" drawings only): Construction of a wet detention pond and access road via conventional methods 13. Purpose of proposed work: NCDENR-DWQ requested the applicant construct the wet detention pond as a condition of the 401 Water Quality Certification. The road will allow access to high ground. 14. State reasons why it is believed that this activity must be carried out in wetlands (include any measures taken to minimize wetland impacts): A wet detention pond must be located in a channel in order to effectively collect/treat runoff. The pond was located in a minor channel on the site at an existing dam to minimize impacts. 15. You are required to contact the U.S. Fish and Wildlife Service (USFWS) and/or National Marine Fisheries Service (NMFS) (see agency addresses sheet) regarding the presence of any federally listed or proposed for listing endangered or threatened species or critical habitat in the permit area that may be affected by the proposed project. Date contacted: (attach responses from these agencies). Performed by the Corps 16. You are required to contact the state historic preservation officer (SHPO) (see agency address sheet) regarding the presence of historic properties in the permit area which may be affected by the proposed project. Date contacted: Performed by the Cor 17. Does the project involve an expenditure of public funds or the use of public (state) land? YES ® NO ? If no, go to 18. a. If yes, does the project require preparation of an environmental document pursuant to the requirements of the North Carolina Environmental Policy Act? YLS ® NO ? b. If yes, has the document been reviewed through the North Carolina Department of Administration State Clearinghouse? YES ® NO ? If answers to 17b is YES, then submit appropriate documentation from the state clearinghouse to division of environmental management regarding compliance with the North Carolina 1?nvironrnental Policy Act. Questions regarding the State Clearinghouse review process should be directed to Ms. Chrys Baggett, Director State Clearinghouse, North Carolina Department of Administration, 116 West Jones Street, Raleigh, North Carolina 27603-8003, telephone (919) 733-6369. 18. The following items should be included with this application if proposed activity involves the discharge of excavated or fill material into wetlands: a. Wetland delineation map showing all wetlands, streams, lakes and ponds on the property (for Nationwide Permit numbers 14, 18, 21, 26, 29 and 38). All streams (intermittent and permanent) on the property must be shown on the map. Map scales should be 1 inch equals 50 feet or 1 inch equals 100 feet or their equivalent. b. If available, representative photograph of wetlands to be impacted by project. C. If delineation was performed by a consultant, include all data sheets relevant to the placement of the delineation line. d. Attach a copy of the stormwater management plan, if required. e. What is land used of surrounding property? Residential/Commercial f. If applicable, what is proposed method of sewage disposal? Municipal g. Signed and dated agent authorization letter, if applicable. NOTE: Wetlands or Waters of the U.S. may not be impacted prior to: 1. Issuance of a Section 404 Corps of Engineers Permit, 2. Either the issuance or waiver of a 401 Division of Environmental Management (Water Quality) certification, and 3. (in the twenty coastal counties only) A letter from the North Carolina Division of Coastal Management stating the proposed activity is consistent with the North Carolina Coastal Management program. Owner's/ gent' ignature Date (Agent's signature valid only if Agent Authorization Letter from the owner is provided (18 g.)) Site Vicinity Map for the Magnet School Project Raleigh West guadranglc (USGS 7.5 Minute Series) uw. 0708900-E 3959300-N ?- i 00 adib Power I a? ;I ?' 1???C: 7 r WT AN, bsti ?% ( S on 4Lj Il / ?' ? i I /Jc, n 450 Q - O i ? ?vN?l?' R I hi III' oilo 39 1?C?-{1CLf7 ma'y' a? Par \ I / o I P e w lli??\ 1?1 f w? ti, t Lake Raleigh ,36 Uadlo (WL /I ?J ?? / ?1 -r ? ?•, _ ? ?? ?? ? OAF ? `r? I I ?? ? /?I?`?. //i? I? _ /. ^? 'J ? / j.. 4 X039 _ 1 I\ S 4l'.30" 108 (LAKr WHEELER ?'10 - -- _ a m Z -, a ? d Z E.k W 4 -- ------ - - -r --------- ---- ? I , I I I I oooo? I I i I I / I I 7 INE 3Q FT. I `? ? /% ye I an am Am am an an am an "M AM an - - TEMP. STRE _ CROSSING dis I N?N? of ?? ? - I I?Q ?? ?> ? TST# ?O I I v / / I \\ I I ? I I I I FLAG MA? OF NEUIIL I I I I , , I I ? I I I ? I I I I ? I ? I MA TCHL I NE I -- ------------------------------------ -? - T - - - I I I I I I I I - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - i -- - - - I I I I I I I I I I I I I I I I I ? ? I I I I I I I I I Z 8 INOZ ?iiAAn NISV9 ISF I 0 1 W n ?ijddn IH1 O NN b I D ° I I I I 00 GNOd NO1NI ilm I I I I I I / I I I I d38 4a A ON 0.3. - \ \ OZ 4Z 30 ON3 / Via I HOlI 30 ONINN1039 I X350 i I I I I I I I I I I I I I I I I I -IN/ 7HJ1 d ----------------- I It, /I I ? I I 1 r wr i?.» ate. Vl 717:J1 UPYL P717 State of North. Caroling Department of Environment and Natural Resolxt?csa Division of Water quality Jarnea B. Hunt, Jr., overrtor q Bill H(lman, Socf Kerr T. Stavens, Dire Ctor i nnrn 7A A MCDENR DM3I00OF WAM QUALWY octobo 8,91999 Mr. Uetxge Worsley I Office or19nanco and Business Campus Box 720113 Halhullay.Nall Raleigh, NC 27695 Dear Mr, Worslay: 3ub?CM Stormwater Mils emsnt Plan Centermial 1VflM1e School Wa6 County,; NC DWQit 990033 This omce i4 l t?etu o of the plow dateaj4 pt?+ 13, 1999 for the storrnwater immagemwtt,wet?and weir anrcttuvaac tbasubjeot faailky spared on your behalf by ct wi September 27, . It is the McEvoy B"gineeriag ai;d aubthl.aa t.o dwo, D,1. 0". understanding of this ee that the exttd WOt defitttlontletld (St)'' to is adequately of Wx Office the weir Kired to trG.t thc;dfifMfa atet shDWri )It'ie aTio the tudetttand?B or wecland at a later ywctures will even ;benep(eoat by R p>ra?etly zed .a. date, As such, thiti t wilt allow.* implt :to Oe streemand buff above SCUT i to Cottdtletetl as long as yt>a ree t0;t)t)uitrl lurtt%uppro.al:for tke stormw?erx management plan and cmatmet and operate ttoetc mwsw roanapuvnt devlcas per that pla» before any of the scW)l twildings are occupiod. If you have any questions regaiding this tiatttr?r, Please contact iMr. Todd St. John at (9149) 733-9584_ i I cc: St. ,t'(a'? 'lClttlg on mile X. d a w ? m t ? I `aey W landDunit Su 'is r t, Watluuds 1Jnit Office I 44o1 Moody CrtaekFjoad. Ralelah, NC 27607' Islaphone 819-7$3.189s rrtx 91 9-770 ease M Equal ppporturdty rmatlve Achm Employer 60% roaWIVU/ 10`Ya po-It-oonaumO( paper