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HomeMy WebLinkAboutSW8010425_HISTORICAL FILE_20011009 STORMWATER DIVISION CODING SHEET POST-CONSTRUCTION PERMITS PERMIT NO. SW8 0 1 A a,I DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS 21HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE aa)I (p OR YYYYMMDD S QrC?e1� �t b Michael F. Easley, Governor • - �OF W AT FRO William G. Ross, Jr., Secretary 10 7 (�x North Carolina Department of Environment and Natural Resources c '— 0"�' 7 O Y Gregory J. Thorpe, Ph.D., Acting Director Division of Water Quality Wilmington Regional Office October 9, 2001 Mr. Keith Walker, President East Carolina Community Development, Inc. 315 Turner Street Beaufort,NC 28516 Subject: Permit No. SW8010425 Phoenix Park High Density Stormwater Project Onslow County Dear Mr. Walker: The Wilmington Regional Office received a complete Stormwater Management Permit Application for Phoenix Park on September 4,2001. Staff review of the plans and specifications has determined that the project,as proposed,will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 010425 dated October 9, 2001, for the construction of Phoenix Park. This permit shall be effective from the date of issuance until October 9,2011,and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts,requirements,or limitations contained in this permit are unacceptable,you have the right to request an adjudicatory hearing upon written request within thirty(30)days following receipt of this permit. This request must be in the form of a written petition,conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings,P.O. Drawer 27447,Raleigh,NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Noelle Lutheran, or me at (910) 395-3900. Sincerely, p Rick Shiver Water Quality Regional Supervisor RSS/uml: S:\WQS\STORMWATIPERMIT\010425.00T cc: Dave Newsom, P.E. Jacksonville Building Inspections Division of Coastal Management Noelle Lutheran Wilmington Regional Office Central Files �4 NCDENH N.C. Division of Water Quality 127 Cardinal Drive EMension Wilmington, N.C.28405 (910)395-3900 Fax(910)350-2004 Customer Service 800-623-7748 State Stormwater Management Systems Permit No. SW8 010425 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY ' STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT i In accordance with the provisions of Article 21 of Chapter 143,General'Statutes of North Carolina as amended,and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO East Carolina Community Development, Inc. Phoenix Park Onslow County FOR THE construction,operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until October 9, 2011 and shall be subject to the following specified conditions and limitations: i 1. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of,stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this permit,the Project Data Sheet.The stormwater control has been designed to handle the runoff from 91,155 square feet of impervious area. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. The tract will be limited to the amount of built-upon area indicated on page 3 ofthis permit,and per approved plans. 5. The runoff from all built-upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. A permit modification must be submitted and approved prior to the construction of additional built-upon area from outside of the approved drainage area. I 2 5 State Stormwater Management Systems Permit No. SW8 010425 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143,General Statutes ofNorth Carolina as amended,and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO East Carolina Community Development, Inc. Phoenix Park Onslow County FOR THE construction,operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until October 9, 2011 and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this permit,the Project Data Sheet.The stormwater control has been designed to handle the runoff from 91,155 square feet of impervious area. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. The tract will be limited to the amount of built-upon area indicated on page 3 ofthis permit,and per approved plans. 5. The runoff from all built-upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. A permit modification must be submitted and approved prior to the construction of additional built-upon area from outside of the approved drainage area. 2 '1 State Stormwater Management Systems Permit No. SW8 010425 DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Project Name: Phoenix Park Permit Number: SW8 010425 Location: Onslow County Applicant: Mr. Keith Walker, President Mailing Address: East Carolina Community Development, Inc. 315 Turner Street Beaufort, NC 28516 Application Date: September 4, 2001 Name of Receiving Stream/Index#: UT New River/ White Oak River/ 19-(11) Classification of Water Body: "SC HQW NSW" If Class SA, chloride sampling results: n/a Pond Depth, feet: 6 Permanent Pool Elevation, FMSL: 39.48 Drainage Area, acres: 6 Total Impervious Surfaces, ftz: 91,155 Offsite Area entering Pond, ftz: None, per Engineer Required Surface Area, ftz: 4,822 Provided Surface Area, ftz: 4,830 Required Storage Volume, 113: 7,928 Provided Storage Volume, ft3: 7,930 Temporary Storage Elevation, FMSL: 40.91 Controlling Orifice: V pipe 3 ti State Stormwater Management Systems Permit No. SW8 010425 II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in it's entirety, vegetated and operational for its intended use prior to the construction of any built-upon surface. 2. During construction,erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency.The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including,but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of side slopes. d. Immediate repair of eroded areas. C. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping. g. Access to the outlet structure must be available at all times. h. The vegetated filter will be kept grassed with no erosion. The spreader mechanism will be kept free of sediment and trash, and must distribute the runoff evenly over the width of the filter. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. Decorative spray fountains will not be allowed in the stormwater treatment system. 6. The facilities shall be constructed as shown on the approved plans.This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 7. Upon completion of construction,prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility,a certification must be received from an appropriate designer for the system installed certifyingthat the permitted facility has been installed in accordance with this permit,the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. 8. If the stormwater system was used as an Erosion Control device,it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 9. A modification must be permitted prior to any construction.The following items will require a modification to the permit. The Director may determine that other revisions to the project should require a modification to the permit: a. Any revision to the approved plans, regardless of size. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built-upon area. e. Further subdivision,acquisition,or sale of the project area.The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. 4 State Stormwater Management Systems Permit No. S W 8 010425 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans,prior to construction.If the proposed BUA exceeds the pemitted amount,a modification to the permit must be submitted and approved prior to construction. 12. Prior to the sale of any portion of the property,an access/maintenance easement to the stormwater facilities shall be granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale of any portion of the property. 13. The permittee is responsible for verifying that the proposed built-upon area does not exceed the allowable built-upon area. 14. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit.Within the time frame specified in the notice,the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. 15. The permittee shall notify the Division of any name,ownership or mailing address changes within 30 days. III. GENERAL CONDITIONS 1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee,documentation from the parties involved,and other supporting materials as may be appropriate. The approval ofthis request will be considered on its merits and may or may not be approved. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality,in accordance with North Carolina General Statute 143- 215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes,rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction. 4. In the event that the facilities fail to perform satisfactorily,including the creation of nuisance conditions,the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Permit issued this the 9th day of October, 2001. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Gregory J. Thorpe, Ph.D., Acting Director J Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 010425 5 State Stormwater Management Systems Permit No. SW8 010425 Phoenix Park Stormwater Permit No. SW8 010425 Onslow County Designer's Certification I, as a duly registered in the State of North Carolina,having been authorized to observe (periodically/weekly/full time)the construction of the project, (Project) for (Project Owner)hereby state that,to the best of my abilities,due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: SEAL Signature Registration Number Date 6 State Stormwater Management Systems Permit No. SW8 010425 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built-upon area. 3. All the built-upon area associated with the project is graded such that the runoff drains to the system. 4. The outlet/bypass structure elevations are per the approved plan. 5. The outlet structure is located per the approved plans. 6. Trash rack is provided on the outlet/bypass structure. 7. All slopes are grassed with permanent vegetation. 8. Vegetated slopes are no steeper than 3:1. 9. The inlets are located per the approved plans and do not cause short-circuiting of the system. 10. The permitted amounts of surface area and/or volume have been provided. 11. Required drawdown devices are correctly sized per the approved plans. 12. All required design depths are provided. 13. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 14. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDENR-DWQ Regional Office Jacksonville, Onslow County Building Inspector 7 ----------- Permit No. SW8010425 (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER IvLkINAGEIGNT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes an application form. .a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. I. PROJECT LNFOR kTION Project Name: Phoenix Park ConmctPerson:Keith Walker President Phone Number: ( 9r,91 Fna_242n For projects with multiple basins, specify which basin this worksheet applies to: N/A elevations Basin Bottom Elevation 33.48 ft- (floor of the basin) Permanent Pool Elevation 3q-4A fr. (elevation of the orifice) Temporary Pool Elevation 40.91 $. (elevation of the discharge structure overflow) areas Permanent.Pool Surface Area 4830 sq. ft. (water su;ace area at the orifice elevation) Drainage Area 6.00 ac. (on-site and off-sire drainage to the basin) Impervious Area 2035 ac. (on-sire and off-sire drainage to the basin) volumes Pe.,nanent Pool Volume 11 ,380 cu. ft. (cor,ebined volume of main basin and forebay) Temporary Pool Volume 7,930 cu. ft. (volume derained above the permanenr pool)' Forebay Volume 2,980 cu. ft. (cpproximarely 20% of total volume) Orher parameters SPJDAI 1 .845 (surdce area to drainage area ra,j5 cm LW(" rabid) Diameter of Orifice L in. (2 to 5 day temporary pool draw-down required) Design Rainfall 1 in. Design TSS Removal '- 90 % (minimum 85% required) Form SWU-102 Rev 3.99 Page 1 of 4 1 F6otnotes: I 1 When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the actual impervious 90 and permanent pool depth. Linear interpolation should be employed to determine the correct value for non- standard table entries. 2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90%TSS removal. The NCDENR BMP manual,provides design tables for both 85%TSS removal and 90%TSS removal. II. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. App ' ants Initials a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). b. The forebay volume is approximately equal to 20110 of the basin volume. c. The temporary pool controls runoff from the design storm event. d. The temporary pool draws down in 2 to 5 days. _ e. If required, a 30-foot vegetative filter is provided at the outlet (include non-erosive flow calculations) f. The basin length to width ratio is greater than 3.1. g. The basin side slopes above the permanent pool are no steeper than 3:1. h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). i. Vegetative cover above the permanent pool elevation is specified. j. A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. N/A 1. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified prior to use as a wet detention basin. m. A mechanism is specified which will drain the basin for maintenance or an emergency. M. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one) 0 does 0does not incorporate a vegetated filter at the outlet. This system (check one) 0 does Odoes not incorporate pretreatment other than a forebay. Form SWLT-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: r a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occ•Lrs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow vegetatve cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to � maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 757o of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). 1 The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 4.5 feet irr the main pond, the sediment shall be removed. 1 When the permanent pool depth reads 4.5 feet in the forebay,.the sediment shall be remove BASPi DIAGRAiM (fill in the blanks) Permanent Pool Elevation 39.48 Sediment Re oval El.34 9$ 75 0 f -!LimenRemovElevation 34.98 75% BottomEle anon4B ---- ---- ----- ---------------------- ------- Bottom Elevation 33.48 257, FOREBAY YLUN POND 5. Remove cattails and other indigenous wedand plants when they cover 505o of the basin surface. Taese plants shall be encouraged to grow along the vegetated shelf and forebay berm. 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical. Form SWU-102 Rev 3.99 Page 3 of 4 7. All components of the wet detention basin system shall be maintained in good working order. ' I acknowledge and agree by my signature below that I am responsible for the performance of the seven 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. rPrint name: Keith Walker Title: President East Carolina Community Development Inc Address: 315 Turner Street, Beaufort NC 28516 Phone:(252) 504-2424 - Signature: � �— 1i�Oj-/— Date: Note: The legally responsible parry should not be a homeowners association unless more than 50170 of the lots tidve been scid and a resident of the subdivision has been named the president. /� Notary Public for the State of ND/"�1 9JLDI�a Counry of Oarjf✓,Ii do hereby certify that Y personally appeared before me this l a k day of and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, SEAL M,v cornmission expires Form SWU-102 Rev 3.99 Page 4 of 4 i i I I 1.0/0n/2001 15: 02 910-346-1210 JOHN L PIERCE PAGE 01 JOHN L. PIERCE - SURVEYING I dAl:',SURVEYING -LAND PLANNING -MAPPING OFFICE:910-346.9800 i I l FAX NO.: 910.346-1210 E-MAIL:jpiercegonslowonllne.net Posr Office Box 1695 409 Johnson Blvd. Jaoksonvllle, N.C.26541 John L, PI ,ce, Q.L.S., L-25H ! II r Fk f' I ll EE DATE: k k-j �AXNO. (910) 346-121,0' '+ I0: oaL- UT �A� 4; NUMBER OF COPIES DtZil;lLTDING THIS PAGE �l k. S ill MARKS: YI Ly l �•i � t {ff{ I i 4-. p: I 6S sf LdX. S, RMLAND AND WOODLAND SUFRIIEYING-SITE PLANNING-SUBDIVISION LAYOUT-LAND DEVELOPMENT PLANNING `., CONSTRUGTI+.'-44 SURVEYING-TOPOGRAPHIC SURVEYING AND MAPPING 17, Vlhase I Environmental Audlt/Risk Assessmern � jS 10/09/20O1 15: 02 910-346-1210 JOHN L PIERCE PAGE 02 Page I of I Bn n �larman Fro l: "Linda Lewis" <Linde ILi�i0@ncrnail.net> To: : I <dnewsorn @�onslowanlirili,net> So ; Monday, August 27, 1061i110:58 AM Su ; phoenix Pack Pe ba e: / r Y ple+Omit another copy of the diANe.ct l';;im plan. I need two. V Al �'lev though Royal Creek may be 6iIi local name for that receiving stre ,i is not listed on the sehedula cif kassiftcations,therefore, it is n Bred an unnamed tributary; a:n ,will pick up the same clan c �on as the New River. \ /Do u lave a typical per building squ:+rfl footage? It helps if I know wha yoy„based your building calculalic n An. Tha s. i Lint if T I i f� it c; I:ql 'I �I v ,k I 1 {1 Ali � V, �1 3 4, 8/27/01 li I 1. / !&,s m! s: r e6346-12e JOH NEeERC r SPA#03 / n e ® am n \ F / } "Linda �y m� \�mkm> T§ : npierce" » j ) Monday, August 7 \wee K Phoenix Park e042# ~ a @ address the revised pond . orifice saiz +ma@ _w7 , c f/ r\, dba« 3nkma_ms 9 / 6, m o7 p : Lin . \ � � t : . \ � � \ , . ( } E l [ ) � \ ( } � ( ! � ( } \ l { ( � ( � \ } : A70Z1 JOHN L. PIERCE & ASSOCIATES, P.A. RECEIVED Land Surveying-Land Planning-Mapping SEP 0 4 2001 P.O. Box 1685 409 Johnson Blvd. Jacksonville, N.C. 28541 letter of transmittal Office: (910)346-9800 Fax No.: (910) 346-1210 ' terce onslowonline.net ogre ion No. E-Mail: jpicrce@onstowonline.net August 29 2001 AT 1111N s. inda Lewis TO Ms. Linda Lewis RE Phoenix ,Park N.C. Department of Environment Stormwater No. SW8010425 and NaturalResources 127 North Cardinal Drive Wilmington, NC 28405 WE ARE SENDING YOU ❑ Drawings ❑ Attached ❑ Under separate cover via the following items: ❑ Copy of Letter ❑ Prints ❑ Plans ❑ Samples ❑ Specifications ❑ Change order ❑ ' COPIES DATE NUMBER DESCRIPTION 1 Revised Stormwater Permit application Sheet 2 of 4 1 Revised Wet Detention Basin Supplement Sheet 1 of 4 1 Set of revised Design Calcuations 1 Revised "Site Dimensions Map THESE ARE TRANSMITTED as checked below: ❑ For approval REMARKS Should you need any additional ❑ For your use information, please let us know. ❑ As requested ❑ Approved as submitted ❑ Approved as noted ❑ Returned for corrections ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ For review and comment ❑ For bids due 19 71 Prints returned after loan to us D_411_j4Y1.11'1 ,��aWrrr Design Calculations ad `N (Revised 8/29/01) Stormwater Wet Detention Basin SE for I Phoenix Park 1a tw off Gum Branch Road - Jacksonville, North Carolina Cs 1- Proiect Description The project consist of construction of residential apartment units and associated sitework on 10.01 acre tract located off Gum Branch Road in Jacksonville,NC. The project will be constructed on a 6.0 acts portion of the tract. The site is currently vacant. Construction will include approximately three apartment buildings(16 units per building),one community building,roads,water and sewer utilities, playground and concrete sidewalks. 2- Design Requirements Project will be designed in accordance with NC Administrative Code Section 15A NCAC 2H.1000- Stormwater Management. This site is in the category of "development activities within in coastal counties except those areas draining to Outstanding Resource Waters or within one-half mile of and draining to SA waters". Due to project density,an engineered solution(wet detention pond)will be required. In accordance with regulations, the engineered solution shall be designed as to provide for 85%removal oftotal suspended solids with a vegetated filter or 90%removal without vegetative filter. 3- Reouired Pond Area Compute Percent Impervious: Impervious Area Total Buildings: 32,447 SF Streets(Roads): -0- Parking(Driveways) 47,608 SF Sidewalks: 8,600 SF Other:(playground) 2,500 SF Offsite: -0- Total: 91,155 SF 2)Total Area Total Project: 261,360 SF Offsite: -0- SF Total: 261,360 SF 3)Percent Impervious Total 34.9% Compute Surface Area: Using Surface Area to Drainage Area Ratio Chart for 90e/a TSS Removal(copy attached)and assuming 6.0' pond depth: SA/DA = 1.845%(interpolated) Therefore: Surface Area = SA/DA x Drainage Area = 1.845% x 261,360 SF =4,822SF (say 4,830 SF) 4- Determine Volume to be Controlled from l" Storm Using Schuler"Simple Method": Rv = 0.05 + 0.0090) where I=percent impervious Rv = 0.364 in/in Control Volume = Design Rainfall x Rv x Drainage Area = 1 in x 0.364 in/in x 6.0 AC(261,360 SE) = 2.18 acre-in or 0.18 acre-feet or 7,927.9 CF say 7,930 CF 5- Determine Depth of Storage Depth required to provide 7930 CF in irregular shaped pond is determined to be 1.43'. Therefore: Normal Pond Surface Area: 4,830 SF Control Volume Surface Area: 6,240 SF 6- Determine Orifice Size Control volume must be drawn down over a period of two to five days: Q, =7,930 CF / (2 days x 86,400 seconds per day) =0.046 cfs Q, =7,930 CF / (5 days x 86,400 seconds per day) =0.018 cfs Using orifice equation(rearranged to solve for diameter): D = (Q / 0.026(h)`n)K ass c h=1()'(normal depth)+'A(1.45xstorage dLTth) D, _ (.046 cfs/0.026(1.72) D, = 1.16" D, _ (.018 cfs/OM6(1.72)")` Ds =0.73„ Usel I"diameter orifice 7- Primary Outlet Primary outlet shall be a 36' CMP installed vertically as a weir structure to pass the 10 year design storm. The 10 year peak discharge(Q.)is computed using the Rational formula as follows: Q, - CIA where: C=0.45 l,�_5.74 in/hr(Wilmington IDF curve w/tc=15 min.) A =6.0 Ac Q,o=(0.45)x(5.74)x(6.0) = 15.5 cfs Assuming'h of the entire circumference of 36" CMP is used as weir,flow per foot of weir may be computed as follows: Flow per foot =15.5 cfs / ((36"/ 12) x PI/2) =3.28 cfs/foot Using sharp crested weir tables(copy attached): where: h=observed head p=6(pond depth) h=0.99, 8- Emergency Spillway Elevation of the emergency spillway shall be set at the depth of flow of the 100 year storm over the primary outlet. The 100-year peak discharge(Q.)is computed using the Rational formula as follows: Q,,= CIA where: C=0.45 l,.= 7.5 in/hr(Wilmington IDF curve w/tc= 15 min) A =6.0 Ac Ql.=(0.45)x(7.5)x(6.00) =20.25 cfs Assuming '/z of the entire circumference of 36"CMP is used as weir, flow per foot of weir may be computed as follows: Flow per foot =20.25 cfs / ((36"/ 12) x PI/2) =4.30 cfs/foot Using sharp crested weir tables(copy attached): where: b=observed head p=6(pond depth) h=1.18' Emergency spillway shall be a broad crested earthen weir designed to pass the 100 year storm(in case primary outlet blocked or overwhelmed): Using the broad crested weir equation(rearranged for H): H=(Q/Cw x L)' where: Q =20.25 cfs C„. = weir coefficient(3.0) L = length of weir(ft)(try 40') H =depth H = 0.30' 9- Forebay Forebay shall include 20%of pond volume: Forebay volume = 11,380 CF x 20% =2,276 CF(2,980 SF provided) 10- Summary Elevations(assuming bottom=Elev. 33 48) Relative Actual Elevation Elevation 100 Yr. Flood(top)- 8.61 42.09 100 Yr.flood storage range: 1.18 10 Yr. Flood- 8.42 41.90 10 Yr.flood storage range:0.99 1-Inch Storage- 7.43 40.91 1-Inch storage range: 1.43 Permanent Pool- 6.00 39.48 Bottom- 0.00 33.48 Outlet Devices: Use 1"orifice bleed down Use 36"diameter CMP primary discharge weir Use 40' broad crested weir emergency spillway RECEIVED JOHN L. PIERCE & ASSOCIATES, P.A. JUL 0 2 N01 Land Surveying- Land Planning-Mapping P.O. Box 1685 BY'--�- 409 Johnson Blvd. Jacksonville, N.C. 28541 letter of transmittal Office: (910) 346-9800 Fax No.: (910)346-1210 DATE JOB NO, E-Mail:ipierce@onslowonline.net June 29 2001 ATTENTION Linda Lewis TO Ms Linda Lewis RE Phoenix park Stormwater #SW8010425 N.C. Department of Environment and Natural Resources 127 N rth CardinalDrive Wilmington, NC 28405 WE ARE SENDING YOU ❑ Drawings ❑ Attached ❑ Under separate cover via the following items: ❑ Copy of Letter ❑ Prints ❑ Plans ❑ Samples ❑ Specifications ❑ Change order ❑ COPIES DATE NUMBER DESCRIPTION 2 Sets of revised plans 1 Copy of your letter dated 6/25/01 2 Copies of Stormwater Permit Application(Sheet 2 of 4) (REVISED) 2 Detention Basin Supplement 1 "Design Calculations" revised 1 "Site Dimensions" ma 1 Quad Map with Site location THESE ARE TRANSMITTED as checked below: ❑ For approval REMARKS ❑ For your use ❑ As requested ❑ Approved as submitted ❑ Approved as noted ❑ Returned for corrections ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Returncorrected prints ❑ For review and comment ❑ For bids due 19 ❑ Prints returned after loan to us SIGNED_ North Carolina Department of Environment and Natural Resources A4jL Division of Water Quality Wilmington Regional OfficeA Michael F. Easley, Governor NCDENR William G. Ross,Jr., Secretary NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES June 25, 2001 Mr. Keith Walker, President East Carolina Community Development, Inc. 315 Turner Street Beaufort, NC 28516 Subject: REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SW8 010425 Phoenix Park Phase I Onslow County Dear Mr. Walker: The Wilmington Regional Office received a Stormwater Management Permit Application for Phoenix Park Phase I on April 20, 2001. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: /l. Please either delineate all wetlands on site, disturbed or undisturbed, or note on the plans that none exist. /2. Please specify pond side slope vegetation and the wetland species to be planted on the 6:1 shelf. 3. Please add the nearest major intersection to the vicinity map. NJ QS 4. Please provide parking lot, playground and driveway dimensions. 2 ` ✓ 5. Please indicate the Playground material and how it will be graded. Has it been Included in the BUA total? V 6. Please label the radius of the permanent pool contour. 7. Royal Creek is not listed in the schedule of classifications for the White Oak River Basin. Please either locate Royal Creek on USGS map or revise. 8. What is proposed BUA per building? 2 9. Please label and dimension any concrete patios or covered wood decks. 127 Cardinal Dr. Ext,Wilmington,North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post-consumer paper 1 Mr. Walker June 25, 2001 Stormwater Project No. SW8 010425 ---------------------------------------------- Please note that this request for additional information is in response to a preliminary review. The requested information should be received by this Office prior to July 25, 2001, or the application will be returned as incomplete. The return of a project will necessitate resubmittaI of all required items, including the application fee. If you need additional time to submit the information, please mail or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request nmst indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 395-3900. Sincerely, 4 64;�J Linda Lewis Environmental Engineer RSS/arl: S:\WQS\STORMWAT\ADDINFO\010425.JUN I cc: Linda Lewis Dave Newsom, P.E. OON VILLE City of Jacksonville RA �;. 001 5A° MAY. 0 7 0001 Caring YCommunity 0 Engineering nn � Mc� wV� V O� LETTER OF TRANSMITTAL Date: May 1, 2001 TO: Attn: Ms. Linda Lewis Division of Environmental Mannement Ref. Erosion &Sedimentation 127 Cardinal Drive Extension Phoenix Park off of Gum Branch Road Wihnineton,N.C. 28405 across from Plantation Boulevard. Phone#(910)395.3900 Linda: WE ARE SENDING YOU ?XX ATTACHED _UNDER SEPARATE COVER _ PRINTS XX PLANS _SPECIFICATIONS _COPY OF LETTER COX OTHER cony of the financial responsibility statement DESCRUMONt THESE ARE TRANSMITTED AS CHECKED BELOWt _ FOR APPROVAL _AS REQUESTED — FOR REVIEW AND COMMENT ZX FOR YOUR USE _ DOCUMENTS ARE DUE TO BE RETURNED BY: _ PRINTS RETURNED AFTER LOAN TO US OTHER REMARKS: Tom Anderson, Engineering Specialist COPIES TO: File Post Office Box 128 Jacksonville, North Carolina 28541 • (910)938-5249 • TDD#(910)455-8852 • FAX(910)455-6761 FINANCIAL RESPONSIBILM/OWNERSHIP FORM SEDIMENTATION POLLUTION CONTROL ACT No person may initiate any land-disturbing activity on one or more contiguous acres as covered by the Act before this form and an acceptable erosion and sedimentation control plan have been completed and approved by the Land Quality Section, N.C. Department of Environment, Health, and Natural Resources. (Please type or print and, if-question is not applicable, please N/A in the blank.) Part A. 1. Project Name Phoenix Park 2. Location of land-disturbing activity: County On s 1 ow City or Township ,lacksonvi l le ,and Highway/Street off Gum Branch Road 3. Approximate date land-disturbing activity will be commenced: June 15, 2001 4. Purpose of development (residential,commercial,industrial,etc.): Residential 5. Total acreage disturbed or uncovered(including off-site borrow&waste areas) 6.0 6. Amount of fee enclosed $ 600.00 7- Has an erosion and sedimentation control plan been filed? Yes XX No 8- Person to contact should sediment control issues arise during land-disturbing.activity. Name John 1. Pierce & Associates Telephone (910 346-9800 9. Landowner(s) of Record (Ilse blank page to list additional owners): Perimeter Properties Name(s) P_0_ Rnx F06 Current Mailing Address Current Street Address Jacksonville, NC 28540 City State Zip City State Zip 10.Recorded in Deed Book No. 762 Page No. 185 Part B. 1. Person(s)or firm(s)who are financially responsible for this land-disturbing activity(Use the blank page to Est additional persons or firms): Fast Carolina Community Develonmerii Inc. Name of Person(s)or Firm(s) 315 Turner Street Mailing Address Street Address Beaufort NC 28516 City State Zip City State Zip Telephone (252) 504-2424 Telephone 2. (a)If the Financially Responsible Party is a Corporation give name and street address of the Registered Agent. Keith Walker, President East Carolina Community Development Inc. Name 315 Turner Street Beaufort, NC 28516 Address City State Zip (252) 504-2424 Telephone Fax No. (b)If the Financially Responsible Party is a Partnership give the name and street-address of General Part ner(LIs J)laak_pagelnlisiadditional partners): Name Address City State Zip Telephone Telephone The above information is true and correct to the best of my knowledge and belief and was provided by me under oath. (This form must be signed by the financially responsible person if an individual or his attorney-in-fact or if not an individual by an officer, director, partner, or registered agent with authority to execute instruments for the financially responsible person). I agree to provide correct information should there be any change in the information provided herein. Keith Walker President Type or print name p Title or Authority Signature Date I, / nn Q i-)n i� L Jc�:j .`i a Notary Public of the County of a2 rb-I�Lk State of North Carolina, hereby certify that 4 e A (!)g1j�fil appeared personally before me this day and being du duly sworn acknowledged that the above form was executed by him. [ Witness my hand and notarial seal, this d q'�l8ay of �9, n � Seal Notary 1 My Commission expires r.� x ,,;?:OFFICE-USEOIVLY gum.m vi Date Received Fee Paid Permit[Number '0 e State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER N ANAGENIENT PERMIT APPLICATION FORM T"nis form may be photocopied for use as an original 1. GENERAL INFORl�LkTION _ 1. Applicants name (specify the name of the corporation, individual,etc. who owns the project): 2. Print Owner/Signing Official's name and title(person legally responsible for facility and compliance): Keith Walker President - 3. Mailing Address for person listed in item 2 above: City: Beaufort State: NC Zip: 28516 Telephone Number: ( 252 1 Fnd 9a2a 4. Project Name(subdivision, facility,or establishment name-should be consistent with project name on plans,specifications,letters, operation and maintenance agreements,etc.): Phoenix ParL S. Location of Project(street address): off .-_ncb Road (NC-,R-1308) City: Jacksonville County: Onslnt - 6. Directions to project(from nearest major intersection): From intersection of NCSR 1470 & NCSR 1308 proceed Southeast along NCSR 13OR +0 8 miles protect is on left aRoroximately 300' off NCSR 13QB 7. Latitude: 34°47'32" Longitude: 77°25'56" of project 8. Contact person who can answer questions about the project Name: John L. Pierce & Associates P.A- Telephone Number. ( 41n )3aF aAn0 Ti. PER_v=LNFOR ATiON: 1. Specify whether project is (check one): XX New Renewal Modification Form SWU-101 Version 3.99 Page 1 of 4 2, If this application is being submitted as the result of a renewal or modification to an existing permit, list the ecisting permit number N/A and its issue date(if known) 3 Specify the type of project(check one): Low Density _(High Density _Redevelop General Permit Other 4. Additional Project Requirements (check applicable blanks): _C_AMA Major XX Sedimentation/Erosion Control _404/401 Permit _NPDES Storrmwater Information on recuired state.permits can be obtained by contacting the Customer Service Center at 1-87-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stommwater management for the project. 2. Stormwater runoff from dus project drains to the White nak River basin. 3. Total Project Area: 6.0 acres 4. Project Built upon Area: 33.q °a 5. How many drainage areas does the project have? 1 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project,attach an additional sheet with the information for each area provided in the same format as below. Basintrifomtatrrra V E) �yl K' �� " Dramase 4rea� Receiving Stream Name U.T. of New River Recaving Stream Class SC Drainage Area I 261 ,360 s.f. Existing Impervious'Area -0 Proncsed Imvervlous'Area I 91 , 155 s.f. %Imvervions' A--a (total) 34.9% e- T 4 DfaInH A-*£'a. �''"` rTM..i ':e R .a ,ja,Dr"g—_. ace JjilD�•,�iDI:S. �t3.T.. _ r---x. On--3iteBuiidings On-site Streets -0- an ite Parking 47,608 s..f On-sire Sidewa!'c 8,600 s.f. Other on-site Off-site Total: 91 , 155 s.f. I Total: Imperaious area is dejmed as the built upon area including, but not limited to, buildings, roads,parking areas, sidewalks,gravel areas,etc. Form SWU-101 Version 3.99 Page 2 of 4 i 7. How was the off-site impervious area listed above derived? N/A E c rV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly,a table listing each lot number,size and the allowable built-upon area for each lot must be provided as an P attachment. 1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number as issued by the Division of Water Quality. These covenants matt not be changed or deleted without the consent of the State. 2. No more than square feet of any lot shall be covered by structures or bnpe pious water als. Imper✓ious materials include asphalt,gravel, concrete, brick,stone,slate or similar material but do not include wood decking or the water surface of swimming pools. 3. Swales shall not be filled in,piped,or altered except as necessary to provide driveway crossings. 4. Built-upon area in rcess of the permitted amount requires a state stormwater management permit modification prior to construction. 5. All permitted runoff from outparces or future development shall be directed into the pe=itted stormwater control system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity and performance of the system as permitted. L By your signature below,you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under them,that they will runwith the land, that the required covenants cannot be changed or 1 deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project Contact,the Stormwater and General Permits Unit at(919) 733-5083 for the status and availability of these forms. Form SW7-T-102 Wet Detention Basin Supplement Form S`WU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SvVU-105 Curb Outlet System Supplement Form SWU-106 Off-Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Supplement Form 5WU-109 Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Page 3 of 4 r VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office. t 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initials • Original and one copy of the Stormwater Management Permit Application Form • One copy of the applicable Supplement Form(s) for each BMP • Permit application processing fee of 5420 (payable to NCDENR) • Detailed narrative description of stormwater treatment/managa..ment [ • Two copies of plans and specifications, including: -Development/Project name -Engineer and firm -Legend 3' -North arrow -Scale -Revision number&date -Mean high water line -Dimensioned property/project boundary -Location map with named streets or NCSR numbers -Original contours,proposed contours,spot elevations, finished floor elevations -Details of roads, drainage features,collection systems,and stormwater control measures -Wetlands delineated,or a note on plans that none exist -Existing drainage(including off-site), drainage easements,pipe sizes,runoff calculations -Drainage areas delineated -Vegetated buffers (where required) F: VIL AGEVTAUTHORIZATION r If you wish to designate authority to another individual or firm so that they may provide information on,your ` behalf,please complete this section. Designated agent(individual or firm): John 1 . Pierce & Associates P A Mailing Address: P.O. Box 1685 City: Jacksonville State: pr. Zip: 28540 Phone: ( 910 1 146-9An0 Fax: ( 910 1 346-1210 VIIL APPLICANT'S CERTIFICATION I,(print or hype name of person listed in General Information, item 2) Ka i t h Wa 1 kPr PrPC i dant certify that the information included on this permit application form is, to the best of my knowledge,correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded,and that the proposed project complies with the requirements of 15A NCAC 2H.1000. u-i Signature: Date: KEiIH WALKER, PRESIDENT EAST CAROLINA COMMUNITY DEVELOPMENT INC. Form SWTJ-101 Version 3.99 Page 4 of 4 OHN L. PIERCE & ASSOCIATES, P.A. \J{ � Land Surveying- Land Planning-Mapping P.O. Box 1685 409 Johnson Blvd. Jacksonville,N.C. 28541 letter of transmittal Office: (910)346-9800 Fax No.: (910)346-1210 E-Mail:jpierce@onslowonline.net o AL ri 1 19, 2001 08 No. ATTENTION Ms. Linda Lewis TO Ms. Linda Lewis RE Phoenix Park N.CC.Department of Environment RECEIVEn and Natural Resources R. IP7 Npr+h Pa rdi A A I nr;.,o Jacksonville, NC 2850 APR 2 0 2001 WE ARE SENDING YOU DWQ / pppp��..�� �``�Soio�LS El Drawings ❑ Attached El Under separate cover TP# dIC following items: ❑ Copy of Letter ❑ Prints ❑ Plans ❑ Samples ❑ Specifications ❑ Change order ❑ COPIES DATE NUMBER DESCRIPTION 2 Sets of plans 2 "Stormwater Management Permit Applications 2 "Design Calculations" 1 Check in the amount of four hundred twenty dollars ($420.00) THESE ARE TRANSMITTED as checked below: ❑ For approval REMARKS Should you need any additional ❑ For your use ❑ As requested infomration, please let us know. ❑ Approved as submitted ❑ Approved as noted ❑ Returned for corrections ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ For review and comment ❑ For bids due 19 ❑ Prints returned after loan to us SIGNED