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HomeMy WebLinkAboutSW8000526_HISTORICAL FILE_20000511STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. I SW qaX65- DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS 0�1I-IISTORICAL FILE C ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE �UIJlY�II YYYYMMDD CAPE FEAR Engineering, inc_ 5040 New Centre Drive, Suite D Wilmington, N.C_ 28403 Voice (910) 790-8584 Fax (910) 790-8583 E-mail cfe cx bellsouth.net TO: N.C.D.E.N.R. 127 Cardinal Drive Wilmington, NC 28405-3845 Wilmington Regional Office FMNTION Scott Vinson _ EKED MAY 1 D00 � .mv Y. Transmittal DATE' May 10, 2000 PROJECT NO450-09 RE: Expostar Portable Displays 6632 Gordon Road Storm Water Submittal Quantity Drawing No. Description 2 Sets (1 orig./lcopy) Stormwater Management Permit Application, Stormwater Narrative and Calculations 2 C-2 Stormwater and Erosion Control Plan 1 Check Fee for Stormwater Submittal; $420.00 REMARKS CC: File Signed Z� Scott FEAR Engineering, Inc. State Stornnvater Management Systems Permit No. SW8 000526 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance witli the provisions of Article 2l of Chapter 143, General Statutes ofNorth Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Mr. Tom Carter, Owner Expostar Portable Displays, 6632 Gordon Road New Hanover County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 21-1 .1000 (hereafter referred to as the "slormivater rules') and the approved stormwater management plans and speci fications 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 September 21, 2010 and shall be subject to the following specified conditions and limitations: 1. DESIGN STANDARDS 1. "i'11is permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. "Phis 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 48,352 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 of this permit, and per approved plans. 5. The onsite and offsite built -upon area permitted with this project must be graded such all the runoff will be directed into the permitted stormwater control system. 2 State Stormwatet' Management Systems Permit No. SW8 000526 DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: Name of lZeceiving Stream/Index #: Classification of Water Body: If'Class SA, chloride sampling results Pond Depth, feet: Permanent Pool Elevation, FMSL: Drainage Area, acres: Total Impervious Surfaces, 1_t2: Of'fsite Area entering Pond, ft2: Required Surface Area, ft2: Provided Surface Area, ft2: Required Storage Volume, ft': Provided Storage Volume, ft': Temporary Storage Elevation, FMSL: Controlling; Orifice: Expostar Portable Displays SW8 000526 New Hanover County Mr. Toth Carter, Owner 5700 Oleander Drive Wilmington, NC 28403 August 31, 2000 Smith Creek / (CFR 18-74-63) "C Sw" n/a 6 52 1.79 48,352 none, per Engineer 2,729 5,588 3,951 4,202 52.7 1 "� pipe 3 State Stormwater Management Systems Permit No. SW8 000526 ll. SCHEDULE OF COMPLIANCE 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, erasion shall be kept to a minimum and any eroded areas ofthe system will be repaired immediately. 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. e. 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 trust be available at all times. 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 tills permit, the approved plans and specifications, and other supporting data. 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 certifying that 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, f 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: 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. C. 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. The Director may determine that other revisions to the project should require a modification to the permit. 11. 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. in hu State Stornnvater Management Systems i'ennit No. SW8 000526 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. I I 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 ofthe 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 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 of this 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. 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 ofthe 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. 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 21st day of September, 2000. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Kerr T. Stevens, Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 000526 State Stormwater Management Systems Permit No. SW8 000526 Expostar Portable Displays Stormwater Permit No. SW8 000526 New Hanover County I)esigner'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: Signature Registration Number Date SEAL C State Stormwater Management Systems Permit Ne. SW8 000526 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. Al] 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: NCDINR-DWQ Regional Office 'Pony Roberts, New Hanover County Building Inspector 7 „r . 1�wCAPE FEAR Engineering, Inc. AUG 3 12000 August 24, 2000 State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28403 Attn: Linda Lewis RE: Expostar Portable Displays 6632 Gordon Road Wilmington, NC Stormwater Project No. SW8 000526 Dear Ms. Lewis, Please find enclosed the response to your request for additional information for the above referenced project: 1. We have revised the grading on the plans so that the circular drive which appears on the plans will now flow to the pond. 2. The south dimension line for the permanent pool contour has been moved and is no longer obscured by the drainage area line. 3. We have revised the plans to show that the area of the building as 19,166.40 S.F. We have check the area of the building and it was incorrectly labeled as 19,263.97 S.F. as the plans indicate. In the "Site Summary” on the plan that we submitted -to you, the building area was, in fact, 19,166.40 S.F. 4. The corrections you made to the "Wet Detention Basin Supplement" concerning the temporary pool and the forebay volumes are approved. 5. The supplement form has been now signed by the notary, Scott Kennedy. 5040 New Centre Dr., suite D • Wilmington, NC 28403 • TEL. (910) 790-8584 • FAX; (910) 790-8583 250 North Chuch street • 5partanburg, 5C 29306 • TEL; (864) 596-8801 • FAX: (864) 596-8802 State of North Carolina Department of Environment And Natural Resources Wilmington Regional Office Water Quality Page 2 of 2 Attached please find two sets of revised storm water plans, and the original supplement sheet (Form: SWU-102, Page 4 of 4). 1 trust this information to be sufficient for your continuing review. If you have any questions, comments, or require additional information regarding this matter, please contact this office. Than you, Scott Kennedy, r. Project Manager Cc: File (450-09 "30") State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office. James B. Hunt, Jr., Governor Bill Holman, Secretary Division of Water Quality August 14. 2000 Mr. Tom Carter, Owner Expostar Portable Displays 5700 Oleander Drive 'Vllmincton. NC 28403 Subject: ACKNOWLEDGMENT OF RECEIPT AND REQUEST FOR ADDITIONAL. INFORMATION Stormwater Project No. SW8 000526 Expostar Portable Displays New Hanover County Dear Mr. Carter: The Wilmin<Lton Ite-ional Office received a Stormwater Management Permit Application for Expostar Portable Displays on July 18, 2000. 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 . The grading at the front of the site around the circular drive does not appear to floes' to the pond. Please clarify. ?. The south dimension for the permanent pool contour has been obscured by the drainage area line. a. The plans indicate that the building will cover 19,264 ft', but the calculations only account for 19,167 ft'. Please clarify. 4. The temporary pool volume and forebay volume reported on the supplement are different than reported in the calculations. I have made the necessary changes. Please indicate your approval in writing. The temporary pool was changed from 4,281 to 4,202 and the forebay was changed from 3,721 to 3,703). 5. The notary, Scott Kennedy, forgot to sign the supplement form. I have enclosed what was submitted as an original, although it is difficult to tell if it is original. Please have the notary sign it. 127 Cardinal Dr. Ext., Wilmington. North Carolina 2840i Telephone 910-39-5-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 50'%, recycled/lU`% host -consumer paper Mr. Carter August 14, 2000 Storrnwater Project No. SW8 000526 ------------------------------ 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 September 14, 2000, or the application will be returned as incomplete. The return of a project will necessitate resubmittal 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 al the bottom of this letter. The request must 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, �C&, Linda Lewis Environmental Engineer RSS/arl: S:IWQSISTORMWATIADDINFO\000526.AUG cc: Linda Lewis Davis Fennell, P.E. 127 Cardinal Dr. Ext., Wilmington, Nortli Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal opportunity Affirmative -Action Employer 50% recycled/10% post -consumer paper CAPE FEAR Jf:f Engineering, Inc. July 13, 2000 Linda Lewis NCDENR Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28403 RE: Expostar Portable Displays 6632 Gordon Road Wilmington, NC Stormwater Project No. SW8 000526 Dear Ms. Lewis, J U L 18 2000 Please find enclosed the response to your request for additional information for the above referenced project: 1. Small areas have been reported in square feet. Enclosed are two (2) copies of the revised Page 2 of 4 of Form: SWU-101. 2. The receiving ditch is normally dry. Tail water effect has been considered and has been deemed negligible. The required 2-5 day drawdown is provided. Please see enclosed calculations. 3. More spot elevations have been added to the plan verifying drainage to the pond. Please see revised plan. 4. The rebar on the trashrack has been reduced from 6" o.c. to 4" o.c. Please see the revised Pond Outlet Detail on the revised plan. 5. Calculations have been revised. The calculations are being resubmitted and has been sealed as requested. Attached please find two sets of revised stormwater plans, two copies of pages 2 of 4 (Form: SWU-101) and two copies of wet pond calculations. I trust this information to be sufficient for your review. If you have any questions, comments, or require additional information regarding this matter, please contact this office. Thank ou, K. Davis F nnell, P.E. Cc: File (450-09 "30") 5040 New Centre Or., Suite O • Wilmington, NC 25403 • TEL (910) 790-5554 • W. (910) 790-5553 250 North Chuch Street • Spartanburg, 5C 29306 • TEL. (564) 596-6601 • FAX. (564) 596-5302 CA LCOL47-IWS WET POND DATA ShffT GG32 GORDON ROAD FINAL POND DESIGN DRAINAGE AREA (Ad) = IMPERVIOUS AREA (Ai): BUILDINGS: ROADS: PARKING : SIDEWALKS: TOTAL: PERCENT IMPERVIOUS (1): I = AcVAi = G2.01 % f- owl u-�� 0.44 ACRES 0.00 ACRES O.G4 ACRES 0.03 ACRES ACRE5 LESS/O ..,�9 SEAL. 024908 wd, POND# I SHALL BE G.0' DEEP AND DESIGNED TO REMOVE 90% T55. 5NDA= 3.50% REQUIRED 5URI=ACE AREA AT PERMANENT POOL: SARfQ.= O.OG2G5 AC. = 2729.03 SF F; SURFACE AREA PROVIDED AT PERMANENT POOL (EL. 52)= 5588 SF .........................................................................................................................% SA PROV'D= 5588 > 2729.03 =5A REQ'D OK ............................................................................................................................ MINIMUM REQUIRED VOLUME (SIMPLE METHOD BY TOM 5CHUELER): Rv=0.05+0.009`(I) Rv= O.G081 VOLUME= I "`Kv*Aci = 0.09070833 AC -FT 395J.255 I'T^ 3 RECEIVED JUL 18 2000 PROJ # �u�WCxbQSZCp POND# I DATA 5HEET PAGE I OF 3 07/05/2000 VOLUME PROVIDED AT TEMPORARY POOL= INCR>=M. FL SA (51=) YQL, ( 52 5588 0 52.5 GI 1 G 2926 53 GG44 3190 54 775G 7200 SET TEMP. POOL ELEVATION: TOTAL 0 2926 GIIG 1331G REQ'D EL.= 52.6G07 USE EL. = 52.7 VOL. PROV'D = 4202 CF .............................................................................................................................. VOL. PROV'D= 4202 > 3951.2G =VOL. REQ'D OK ............................................................................................................................. FOREBAY SIZING: PERMANENT POOL VOLUME: INCREM. TOTAL EL. 5A (5f) VOL, (CF) VOL. (CI) 4G 1095 0 0 47 1 G I G 1355.5 1355.5 48 2227 1921.5 3277 49 2928 2577.5 5854.5 50 3719 3323.5 9178 5 1 4GOG 41 G2.5 13340.5 52 5588 5097 15437.5 REQ'D VOLUME = 20% OF TOTAL PERMANENT BASIN VOLUME = 3G87.5 CF POND# I DATA 5HffT PAGE 2 OF 3 07/05/2000 CHECK FOREBAY VOLUME: INCREM, TOTAL EL.,. 5A (5F) VOL. (CF) VOL. (CF) 48 5 0 0 49 85 45 45 50 2GG 175.5 220.5 5 1 555 410.5 G3 1 52 5588 3071.5 3702.5 PROV'D VOLUME = 3702.5 CF ............................................................................................................................. VOL. PROV'D= 3703 > 3G88 =VOL. REQ'D OK ............................................................................................................................. ORffICE 51ZING: REQ'D DRAWDOWN TIME = 2-5 DAYS 02= 0.02287 CF5 (FOR 2 DAY DRAWDOWN) Q5 = 0.00915 CFS (FOR 5 DAY DRAWDOWN) SELECT A 1.0 INCH CIRCULAR ORIFICE, (PERM. POOL EL. = 52 ) Q PROV'D= Cd`A`(2gh)^ 1/2 WHERE: Cd= O.G A= 0.00545 SF g= 32.2 FP5/5 h= avg head: 0.329) 7 Q PROV'D= 0.01507 ...................................................................... 02> 0,01507 >05 OK ........................................................................ DRAWDOWN TIME = VOL. REQ.'D = 3G88 CP Q PROV'D 0.0 15 1 CFS TIME = 2.83 DAYS POND# I DATA SHEET PAGE 3 OF 3 07/05/2000 Stormwater and Erosion Control Design Narrative Specifications Supporting Calculations for 6632 Gordon Road Proposed Construction RECEIVED MAY 11 2000 DWQ PRor # Sw vy�S2 (a a New Hanover County, North Carolina Prepared for Expostar Portable Displays 5700 Oleander Drive OBMA400 Wilmington, NC 28403 .�y�` SA/?0 pFE /0 Q 'L • 9r SEAL 024908 Date: May 8, 2000 Prepared by Cape Fear Engineering, Inc. 5040 New Centre Dr., Suite D. Wilmington, North Carolina 28403 (910) 790-8584 STORMWATER NARRATIVE 1. GENERAL: The 6632 Gordon Road site is located approximately one half mile west of the intersection of SR1327 and US17, and approximately two miles east of the intersection of SRI327 and HWY 132, in the area of Ogden. The existing site occupies 1.79 acres, bound to the southeast by Dutch Square Extension (MB #32, PG#334), to the northwest by Oliver Godwin (DB#779, PG#192), and to the northeast by Gordon Road. 2. EXISTING CONDITIONS: The existing drainage pattern is roughly from northeast to southwest, through two existing shallow conveyance swales. Collected runoff from the property is currently discharged into an unnamed tributary'of Smith Creek. Smith Creek is designated a SC stream class. Currently, no off -site drainage enters the site. 3. PROPOSED IMPROVEMENTS: The storm drain collection system will be expanded as shown on the attached plan to receive runoff from the expansion area. All improvements proposed on -site, including proposed roof drains, will drain to the proposed wet pond. 4. EROSION CONTROL CONSIDERATIONS: At the time that disturbance is to begin a temporary construction entrance will be installed at the Gordon Road entrance to the site. Silt fence will be installed as shown on the plan. Inlet sediment protection (see detail) will be installed around each proposed catch basin to improve the containment of sediment. Energy dissipaters will be constructed at the outlet of each drainage system. The proposed pond will be utilized as a temporary sediment basin during construction 5. MAINTENANCE CONSIDERATIONS: During construction, the Contractor shall be required to inspect and repair as needed all erosion control devices after any significant rain event. Any measure found not performing shall be repaired immediately. Upon completion of construction and establishment of permanent ground cover, the Owner shall be responsible for maintenance on the project site. 6. STORMWATER CONSIDERATIONS: All stormwater runoff is to be collected and conveyed to an on site detention/treatment to be designed in accordance with Division of Water Quality regulations. To optimize land use, the treatment pond has been oversized to fit the available space. The required surface area is 2729.03 sf, while the provided surface area is 5588 sf. For this reason, it may appear as if the required 3:1 length to width ratio has not been satisfied. However, at the minimum required surface area, the 3:1 ratio is satisfied. Please see attached calculations for additional treatment criteria. o Now t 1�-- j � 1 � r � • Sl AP A. sn �• f�{'',� •J '-'`�Yt,� '�`' -� �-��� '''` `-�,' ,� F'=" ' �-: F . 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DATED : 1117 Ivy,.,„�`� ll' ._ `. � (f � � '•� hSI.��T77 til'II'�' _� P: ADOW 15A NCAC 2B.CAPE FEAR RIVER BASIN httpilth2o.clinr.statc,nc.us/sIrTnclassAiydro/capefear.htniI Rizzo Creek (Resoe Creek) Birch Creek Mill Creek Kellys Creek Guf£ords Branch Juniper Branch Mill Creek Collins Branch Morgans Creek Cowpen Branch Tonys Creek Lagoon Creek Fishing Creek Dock Creek 'Northeast Cape Fear River Ness Creek Smith Creek Spring Branch Burnt Mill Creek Mineral Springs Branch Alligator Creek Greenfield Creek Greenfield Lake Silver Stream Branch Clay Bottom Branch Jumping Run Branch Squash Branch Brunswick River Sturgeon Creek Mill Creek Rowell Branch Banton Branch Redmond Creek Jackeys Creek Piney Branch Mallory Creek Little Mallory Creek (Beaverdam Branch) Barnards Creek Town Creek (Rattlesnake Branch) Turkey Branch Lewis Swamp Tompkins Branch (Tomo- lin Branch) Lewis Branch Beaverdam Swamp Rock Creek Russells Creek Rice Creek Mill Creek Swain Branch Hickman Branch Willet Branch Harris Swamp Bell Swamp Cherry Tree Swamp From source to Rileys Creek C Sw From source to Rizzo Creek C Sw From source to Rileys Creek C Sw From source to Rileys Creek C Sw From source to Rileys Creek C Sw From source to Long Creek C Sw From source to Long Creek C Sw From source to Mill Creek C Sw From source to Long Creek C Sw From source to Northeast Cape Fear River C Sw From source to Northeast Cape Year River C Sw From source to Northeast Cape Fear River C Sw From source to Northeast Cape Fear River C Sw From source to Northeast Cape Fear River C Sw From mouth of Ness Creek to Cape Fear River SC Sw From source to Northeast Cape Fear River C Sw From source to Northeast Cape Fear River C Sw From source to Smith Creek C Sw From source to Smith Creek C Sw From source to Burnt Mill Creek C SW From source to Cape Fear River SC Sw From Greenfield Lake to Cape Fear River SC Sw Entire Lake C Sw From source to Greenfield Lake, Green- C Sw field Creek From source to Greenfield Lake, Green- C Sw field Creek From source to Greenfield Lake, Green- C Sw field Creek From source to Greenfield Lake, Green- C Sw field Creek From source to Cape Fear River SC From source to Brunswick River C Sw From source to Sturgeon Creek C Sw From source to Mill Creek C Sw From source to Mill Creek C Sw From source to Brunswick River SC Sw From source to Brunswick River C Sw From source to Jackeys Creek C Sw From source to Cape Fear River C Sw From source to Mallory Creek C Sw From source to Cape Fear River C Sw From source to Cape Fear River C Sw From source to Town Creek C Sw From source to Town Creek C Sw From source to Lewis Swamp C Sw From source to Lewis Swamp C Sw From source to Town Creek C Sw From source to Town Creek C Sw From source to Town Creek C Sw From source to Town Creek C Sw From source to Rice Creek C Sw From source to Mill Creek C Sw From source to Mill Creek C Sw From source to Mill Creek C Sw From source to Mill Creek C Sw From source to Mill Creek C Sw From source to Bell Swamp C Sw 01/1 /2ow)Q:Ii An Erosion and Sedimentation Control 1.01 General: The contractor shall be responsible for erosion and sedimentation control within the construction limits; for prevention of sediment laden runoff leaving the construction limits or entering ditches, streams or water impoundments; and for implementation of necessary erosion and sedimentation control measures to meet the requirements of the North Carolina Department of Environment, Health, and Natural Resources. The Contractor shall also be responsible for all damages or fines resulting from erosion or sediment laden runoff in the execution of his contract. 1.02 Construction Sequence: While the use of erosion and sedimentation control devices is especially important on areas of steep topography, easily erodible soils and sites in close proximity to water courses throughout the construction period, the control measures should be installed prior to the commencement of land clearing and shall be fully maintained and periodically inspected until final restoration and stabilization is completed. Unrestored cleared areas shall be kept to a minimum. Disturbed areas ahead of construction shall only be accomplished on those segments for the shortest practical distance as required for continual progress. Final restoration shall not be delayed until completion of the project but will be carried out in phases as the work proceeds. Under no circumstances will any areas be left denuded for more than (30) thirty calendar days without some form of stabilization until final restoration is complete. 1.03 Sedimentation: Control Measures: The following are some of the sediment control devices or measures that may be required to prevent sedimentation of streams, water courses, or drainage structures: 1. Earth berms and/or diversion and intercept ditches. 2. Sediment traps 3. Filter berms 4. Filter inlets S. Silt fences - not to be placed in streams or ditches perpendicular to flow. 6. Check dams gravel filter 7. Gravel construction exit 1.03.1 Erosion Control Measures: Some of the soil erosion control measures which may be required in this contract are: l . Earth slope protection 2. Diagonal water break diversion berms 3. Diversion channels 4. Preservation of existing vegetation Storm inlet protection 6. Stream crossings 7. Energy dissipators 8. Matting of re -seeded areas 1.03.2 Detail Drawing: Examples of sedimentation and erosion control details are shown in these plans for installation at locations designated in the plans or as otherwise required by the regulating agency, or the owner as work proceeds. 1.04 Stream Protection: Where construction activities are necessary in close proximity to streams, and other waterways, they shall be performed in a manner that does not contribute to degradation of or blockage of the stream -flow. In order to prevent possible degradation or blockages, the contractor shall be required to: 1. Keep all construction debris, excavated materials, brush, rocks, refuse and topsoil as far from these waterways as possible. Restrict machinery operation or stream crossings in waterways to the extent necessary for construction of utilities crossings. 2. If construction work areas are necessary in a waterway, they shall be protected as indicated on the plans. 3. If temporary roadways are essential for the construction activities, they shall be constructed of soils which are not highly erodible materials and must not span more than half way across the water course or wetland area at any one time unless otherwise approved by the Engineer. These temporary roadways shall be entirely removed as soon as their requirement is met. Work in these areas shall follow the requirements of the Corp of Engineers or CAMA permit, or plans as applicable. 1.05 Construction Access: The travel of equipment to and from the construction areas shall be minimized not only to protect areas that will not be denuded, but also to prevent the spreading of sediment within and outside of the construction areas. Therefore, special construction equipment travel corridors will be established for this use and instructions shall be issued for their use. Use of these corridors must be fully enforced. Other non -essential traffic will be restricted or discouraged. Indiscriminate and convenience traffic shall not be allowed. 1.06 Stockpile/Barrow Areas: The Contractor shall be responsible for selecting, obtaining and maintaining stockpile or borrow areas which he may require to complete the contract. He is also required to design and incorporate all necessary sediment and erosion controls measures necessary to prevent erosion and contribution of sediment to adjacent areas. The Contractor is responsible to obtain all necessary permits or approvals for borrow or spoil areas outside the construction limits. 1.07 Disposal of Excess Water From Excavations: The Contractor shall practice management of excess water pumped from excavation to reduce the production and spreading of sediment. Pumped water shall be discharged onto stabilized surfaces and allowed to filter through existing vegetation if possible, otherwise, additional control measures may be necessary. If ditches are required to remove pumped water from construction excavations, they shall be given the same consideration as any other man- made waterway and they shall be stabilized as to not degrade and produce sediment. 1.08 Excavation and Backfill: Excavation shall be closely controlled and all the material removed from the excavation shall be selectively stockpiled in areas where a minimum of sediment will be generated and where other damage will not result from the piled material. Drainage ways shall be protected at all times and the placement of material in Drainage ways for convenience shall not be allowed. Backfilling operations shall be performed in such a manner that remaining trees are not damaged. 1.09 Final Grading and Seeding: Finish grading, topsoiling, seeding and/or sodding shall be performed after the construction phase is complete. Permanent vegetation of the areas, that have been disturbed, shall be re-established as rapidly as possible. If the completion of the construction activities do not coincide with a season in which permanent vegetation can be generated, an interim or temporary program is required. This shall include soil conditioners and mulching as necessary for soil stabilization. In any case, sediment and erosion controls shall be installed promptly and their maintenance assured. 1.10 Approval: The approved Erosion Control Plan will be provided by the Owner. Any standard conditions relating to soil erosion and sediment control issued to the Contractor as a part of any permits shall be available at the job site at all times. REQUIRED FOND 51ZE: The pond size must be 1800 cu. ft per acre tames the area of disturbance in acres to function as a sediment control basin. Area of disturbance= 1 .79 acres (1 800 cflacre)X 1 .79 acres)=3222 sf Proposed pond size at an elevation of 52 ft is 5588 sf x G' deep 33,528 sf > 3222 sf = size required OK Therefore, the proposed wet pond will function as a sediment control basin during construction. OUTLET PROTECTION DATE DESIGN PHASE DESIGN 4-21-00 PRELIM CONSTR 1 x I (�( PROJECT NAME PROJECT NO 6632 GORDON ROAD 405-09 REVISION RECORD �L LOCATION BY NEW HANOVER CO., NC JTK OTHER (SPECIFY) CHECKED BY PGD Storm Outlet Structure FES No.= 3 Pipe Dia= 18 in Q10 = 4.20 cfs V = 4.19 fps, From Fig. 8.06.b.1: From Fig. 8.06.b.2: Zone D50 DMAx Riprap Class Apron Thickness Apron Length Apron Width = 3xDia 1 = 4 in - 6 in A 9 in 6.0 ft 4.5 ft Storm Outlet Structure FES No.= 5 Pipe Dia= 24 in Q10 = 7.50 cfs V = fps From Fig. 8.06.b.1: From Fig. 8.06.b.2: Zone = 1 D5o = 4 in DMAx = 6 in Riprap Class A Apron Thickness = 9 in Apron Length = 8.0 ft Apron Width = 3xDia = 6.0 ft FES—RIPRAP.xIs LATEST REVISION: 05/08/2000 11:44 AM PAGE 1 OF 2 25 20 W, S CL � 15 Z 110 >- f 5 ESTIMATION OF STONE SIZE AND DIMENSIONS FOR CULVERT APRONS I I - I I I i I I I I p 5 10 15 20 25 D o I N F T. Step 1> Estimate flow velocity V. at culvert or paved channel outlet, Step 2> For pipe culverts Do is diameter. For pipe arch, arch and box culverts and paved channel outlets, D o s A 0, where A a e cross sectlonal area of flow at outlet. For multiple culverts, use Do = 1.25 x D o of single culvert. Step 3> For apron grades of 10% or steeper, use recommendations for next higher zone (zones 1 thru 6) Lo �Z APRON MATERIAL LENGTH OF APRON TO PROTECT CULVERT L1 TO PREVENT SCOUR HOLE L2 1 Stone Filling (Fine) 3 x D o 4 x D o 2 Stone Filling (Light) 3 x D o 6 x D o 3 Stone Filling (Medium) 4 x D o 8 x D o 4 Stone Flliing (Heavy) 4 x D o 8 x D o 5 Stone Filling (Heavy) 5 x D 0 10 x D 0 6 Stone Filling (Heavy) 6 x D o 12 x D o 7 Special study required (energy dlslpalors, stilling basin or larger stone size.) WET POND DATA SHEET GG32 GORDON ROAD FINAL POND DESIGN DRAINAGE AREA (Ad) = IMPERVIOUS AREA (Ai): BUILDINGS: ROAD5: PARKING: SIDEWALKS: 1.79 ACRES 0.44 ACRES NEA 0.00 ACRES 0. G4 ACRES 0.03 ACRES 1 01 TOTAL: 1.1 1 ACRES PERCENT IMPERVIOUS (1): I = AcM � G 2.01 % 4— POND# I SHALL BE G.0' DEEP AND DESIGNED TO REMOVE 90% T55. 5A/DA= 3.50% REQUIRED SURFACE AREA AT PERMANENT POOL: 5AREQ_= O.OG2G5 AC. = 2729.03 SF SURFACE AREA PROVIDED AT PERMANENT POOL (EL. 52)= 5588 SF SA PROV'D= 5588 > 2729.03 =5A REQ'D OK 5............................................................................................................................. MINIMUM REQUIRED VOLUME (SIMPLE METHOD BY TOM SCHUELER): Rv=0.05+0.009'(1) Kv= O. G081 VOLUME= 1 "*Rv'Ad = 0.09071 AC -FT 3951.2G ET ^ 3 POND# 1 DATA 5NEET PAGE I Of 3 05/ 10/2000 VOLUME PROVIDED AT TEMPORARY POOL: INCREM. TOTAL EL. S_ A (5F) VOL. CF VOL. CF 52 5588 0 0 53 GG44 GIIG GEIG 54 775G 7200 1331G SET TEMP. POOL ELEVATION: REQ'D EL. = 52. G993 - U5E EL. = 52.7 VOL. PROV'D = 4251 CF ....................................................................................................................... ...... VOL. PROV'D= 4281 > 395 1 .2G =VOL. REQ'D OK .............................................................................................................................: FOREBAY 51ZING: PERMANENT POOL VOLUME: INCREM. TOTAL EL. 5A (5F) VOL. CF VOL. (CF) 4G 1095 0 0 47 1 G I G 1355.5 1355.5 48 2227 1921.5 3277 49 2928 2577.5 5554.5 50 3719 3323.5 9175 51 4000 4 1 G2.5 13340.5 52 5588 5097 18437.5 REQ'D VOLUME = 20% OF TOTAL PERMANENT BASIN VOLUME = 3G87.5 CF POND# I DATA 5HEET PAGE 2 OF 3 05/10/2000 CHECK fOREBAY VOLUME: INCREM, TOTAL EL. SA (SP) VOL. (CP) VOL. (CE) 48 5 0 0 49 85 45 45 50 2GG 175.5 220.5 51 555 410.5 G31 52 5558 3071.5 3702.5 PROV'D VOLUME = 3702.5 CF VOL. PROV'D= 3703 > 3G88 =VOL. RFQ'D OK ORIPICE SIZING: REQ'D DRAWDOWN TIME = 2-5 DAYS Q2= 0.02287 CF5 (FOR 2 DAY DRAWDOWN) Q5= 0.009 15 CF5 (FOR 5 DAY DRAWDOWN) SELECT A 1 .0 INCH CIRCULAR ORIFICE, (PERM. POOL EL. = 52 Q PROV'D= Cd'A'(29h) ^ 112 WHERE: Cd= O.G A= 0.00545 SP g = 32.2 PP5/5 h= avg head: = 0.32917 Q PROV'D= 0.01 507 �............................................................. Q2> 0.01507 >Q5 OK ...................................................................... POND# I DATA 5MEET PAGE 3 Of 3 05/10/2000 85% TSS REMOVAL IN COASTAL COUNTIES (30 FOOT VEGETATED FILTER REQUIRED) DEPTH 3' 3.5' 4.0' 4.5' 5.0' 5.5' 6.0' 6.5' 7.0' 7.5' IMP % 10% .9 .8 .7 .6 .5 0 0 0 0 0 20% 1.7 1.3 1.2' 1.1 1.0 9 .8 .7 .6 .5 30% 2.5 2.2 1.9 1.8 1.6 1.5 1.3 1.2 1.0 .9 40% 3.4 3.0 2.6 2.4 2.1 19 1.6 1.4 1.1 1.0 50% 4.2 3.7 3.3 3.0 2.7 2.4 2.1 1.8 1.5 1.3 60% 5.0 4.5 3.8 3.5 3.2 2.9 2.6 2.3 2.0 1.6 70% 6.0 5.2 4.5 4.1 3.7 *3.3 2.9 2.5 2.1 1.8 80% 6.8 6.0 5.2 4.7 4.2 3.7 3.2 2.7 2.2 2.0 90% 7.5 6.5 5.8 5.3 4.8 4.3 3.8 3.3 2.8 1.3 100% 8.2 7.4 6.8 6.2 5.6 5.0 - 4.4 3.8 3.2 2.6 * Rcvista 10/31/97 90% TSS REMOVAL IN COASTAL COUNTIES (NO VEGETATED FILTER REQUIRED) DEPTH 3' 3.5' 4.0' 4.5' 5.0' 5.5' 6.0' 6.5' 7.0' 7.5' IMP % 10% 1.3 1.0 .8 .7 .6 .5 .4 .3 .2 .1 20% 2.4 2.0 1.8 1.7 1.5 1 A 1.2 1.0 .9 .6 30% 3.5 3.0 2.7 2.5 2.2 1.9 1.6 1.3 1.1 .8 40% 4.5 4.0 •3.5 3.1 2.8 2.5 2.1 1.8 1.4 1.1 50% 5.6 5.0 4.3 3.9 3.5 3.1 2.7 2.3 1.9 1.5 60% 7.0 6.0 5.3 4.8 4.3 3.9 3.4 2.9 2.4 1.9 70% 8.1 7.0 6.0 5.5 5.0 4.5 3.9 3.4 2.9 2.3 80% 9.4 8.0 7.0 6.4 5.7 5.2 4.6 4.0 3.4 2.8 90% 10.7 9.0 7.9 7.2 6.5 5.9 5.2 4.6 3.9 3.3 100% 12.0 10.0 8.8 8.1 7.3 6.6 5.8 5.1 4.3 3.6 SIZE PRINCIPAL SPILLWAY AND EMERGENCY SPILLWAY TO PA55 10 YEAR - 24 HOUR STORM EVENT DRAINAGE AREA = 1.79 AC (MPERVIOU5 = G2.0% Cc = 5UM(CA)/5UM(A) W'dEKE C IMPERVIOU5 = C PERVIOUS = DE51GN STORM EVENT = RAINFALL_ INTENSITY = G.3 TOP Or OUTLET 5TKUCTURE= INVERT Of OUTLET 5TRUCiURf TOP OF POND ELEVATION = DIMENSIONS OF OUTLET 5TRUCTt TOP OF SPILLWAY = TOP EL. = 52.7 INVERT = 49.G 0. GG505 0.95 0.2 10-year, 10 minute duration IwNR 52.7 M5L 49. G M5L 54 M51_ 4' TOP OF DIKE = 54 WIDTH OF EMERGENCY 5PILLWAY 10.0' TOP OF DIKE = 54 TOP OF SPILLWAY = 53.5 Q rCq = Cc I A = 7.50 d5 F MNCIPAL 5PILLWAY TO PA55 REQUIRED 10 YEAR 5TORM EVENT POND91 DATA SHEET 05/ 1012000 QHF�I f=OR_F�W CAPACITY Of BAIL HW = 2.90 Dia. Of outlet pipe = 2.0 Hw/DfA. = 1.45 r Q=CA(2 1h) ^. 5xNb 27.9OG5 cfs Where C=O.G5 (Groove -end with headwall) Nb=number of barrels= ! barrels •..........................................................................................................................L Q prrn= 27.91 cfs > 7.50 cfs =Q req OK .............................................................................................................................: -CHlS FQRFLQ.W CAPACITY OF R15f- Q prrn = Cw L 11 ^ 3/2 = 37.78OG CF5 Where Cw=3.3 (5harp-cre5ted weir) ....................... ....... ...................... ........................................................................ y Q prin= 37.75 cfs > 7.50 cfs =Q req OK s .............................................................................................................................: F�K_F�R �LQW�APA�fTY OF CMCRGFNCY SPILLWAY FOR 25 YFAR STORM RAINFALL INTEN5ITY = 7. 13 IWHR Q req = Cc I A = 5.49 cfs f-- EMERGENCY SPILLWAY TO PA55 REQUIPED 25 YEAR 5TORM EVENT Q emergency = Cw L H ^ 3/2 = 1 O.G I cfs Where Cw=3.0 (Broad -crested weir) ................................................... ............. ...................................... ti Q emer= IO.G1 cF5 > 5.49 cF5 =Q req OK: .............................................................................................................................: POND#1 DATA SHEET 0511 G12000 ArJA NCDENR North Carolina Department of Environment and Natural Resources Beverly Eaves Perdue Governor November 19, 2009 M,r. Tom Carter 5700 Oleander Drive Wilmington, NC 28403 Division of Water Quality Coleen H. Sullins Director Subject: 'Session Law 2009-406 — Permit Extension Stormwater Permit #SW8 000526 High Density — Expostar Portable Displays New Hanover County Dear Mr. Carter: Dee Freeman Secretary On August 5, 2009, the Governor signed Session Law 2009-406. This law impacts any development approval issued by the Division of Water Quality under Article 21 of Chapter 143 of the General Statutes, which is current and valid at any point between January 1, 2008, and December 31, 2010. The law extends the effective period of any stormwater permit that is set to expire during this time frame to 3 years from its current expiration date. Accordingly, Stormwater Permit # SW8 000526, which was set to expire on September 21, 2010, is now in effect until September 21, 20.13. Please resubmit the renewal application and fee at least 180 days prior to September 21, 2013, which would be March 21, 2013. A copy of the Renewal Application can be obtained from the following website: http://h2o.enr.state.nc.us/su/bmp forms.htm. If you have any questions, please contact the Division of Water Quality in the Wilmington Regional Office at 910-796-7215. Sincerely, ,c ? -a-0, ,S Georgette Scott Stormwater Supervisor Division of Water Quality S:\WQS\STORMWATER\RENEWAL\SL2009-406\000526.novO9 CC'. Wilmington Regional Office Central Files 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 One Phone: 919-807-63001 FAX. 919-807-64921 Customer Service: 1-877-623-6748 N orth C aro li n a Internet: www.ncwaterquality.org �aturalCr� An Equat Opportunity 1 Affirmative Action Employer State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office ,lames B. Hunt, ,Ir., Governor Bill Holman, Secretai-y Division of Water Quality .tune 22 2000 Mr. Tom Carter, Owner 5700 Oleander Drive Wilmington. NC 28403 Subject: ACKNOWLEDGMENT OF RECEIPT AND REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SW8 000526 Expostar Portable Displays New Hanover Count, Dear Mr. Carter: The Wilmington Regional Office received a Stormwater Management Permit Application for Expostar Portable Displays on May 11, 2000. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: I. Please report small areas in square feet rather than acres on the application. It makes it much easier to verify the numbers. 2. What is the normal water level in -the receiving ditch? Please keep in mind that blockages and/or flooding problems in outlet ditches will not be considered as justification for not providing the required 2-5 day.drawdown time. Please make sure that the effect of a high water level in the ditch has been considered in the design of this pond. Please provide sufficient contours and spot elevations in the parking lot to verify drainage into the pond. 4. Please reduce the 6" o.c. rebar for the trashrack to no more than 3)%4". The calculations indicate that the volume provided at elevation 52.7 is 4,182 cubic feet, but it appears that number is based on the average surface area between 52 -and 53, not 52 and 52.7. Pleas:; corrcrt. Whi2c :sufficient volume is still provided using the average surface are between 52 and 52.7, the error must be corrected. Please submit a revised and settled page 2 of 3. 127 Cardimil 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 Mr. Carter June 22. 2000 Storrilwater Project No. SWS 000526 ---------------------------------------------- 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 221. 2000, or the application will be returned as incomplete. The return of a project will necessitate resubmitta] 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 must indicate the (late 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 tinder 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, GC,06" Linda Lewis Environmental Engineer R'SS` ' S:1WQS\STORMVIATADDiTgF01000526.JUN cc: Linda Lewis Davis Fennell, P.E. 127 Cardinal Dr. Ext., Wilmington, forth Carolina 28405 Telephone 910-395-39{}0 FAX )]0-350-2004 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper