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HomeMy WebLinkAboutSW8990923_Historical File_20040618Michael F. Easley, Governor �O G � blu, d r, - i0i -1 fl < Dr. Eric McKeithan, President Trustees of Cape Fear Community College 411 South Front Street Wilmington, NC 28401 Dear Dr. McKeithan: William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. IQimek, P.E.,Director Division of Water Quality Coleen H. Sullins, Deputy Director Division of Water Quality June 18, 2004 Subject: Permit No. SW8 990923 Modification Cape Fear Community College=North Campus High Density Stormwater Project New Hanover County The Wilmington Regional Office received a complete modification to the Stormwater Management Permit Application for Cape Fear Community College -North Campus on June 18, 2004. 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 990923 Modification dated June 18, 2004, for the construction of Cape Fear Community College -North Campus. This permit shall be effective from the date of issuance until January 28, 2010, (10 years from the original issue date) and shall be subject to the conditions and Iimitations 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 either Laurie Munn, or me at (910) 395-3900. Sincerely, Rick Shiver Water Quality Regional Supervisor RSS/Ism: S.\WQS\STORMWAT\PERMIT\990923mod jun04 cc: Phil Norris, P.E. Tony Roberts, New Hanover County Inspections Beth E. Wetherill, New Hanover County Engineering Laurie Munn 'X*,hnitz`t ,-n Rzinc-nal Offce Central Files N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Wilmington Regional Office Wilmington. NC 28405 (910) 350-2004 Fax Customer Service 1 800 623-7748 vow A KC6OUR State Stormwater Management Systems Permit No. SW8 990923 Modification 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 of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERNIISSION IS HEREBY GRANTED TO Trustees of Cape Fear Community College Cape Fear Community College -North Campus New Hanover County FOR THE construction, operation and maintenance of four wet detention ponds 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 January 28, 2010 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 controls designated as Ponds 1, 2 3, and 4 have been designed to handle the runoff from a total of 1,268,467 ftZ, 280,526 ft , 1,219,680 ftZ, and 536,037, respectively, of built -upon 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. Page 2 of 9 State Stormwater Management Systems Permit No. SW8 990923 Modification DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: Name of Receiving Stream/Index #: Classification of Water Body: Pond Number Drainage Area, acres: Onsite: Offsite: Total Impervious Surfaces, f Buildings fl Streets, ft Parking, ft Sidewalk, ft2: Tennis Court, if: Future Area, ft2: Pond Depth, feet: Permanent Pool Elevation, FP�ISL: Provided Surface Area,112: Provided Storage Volume, R3: Temporary Storage Elevation, FMSL: Controlling Orifice Pipes: Forebay Volume, ft3: Cape Fear Community College North Campus SW8 990923 Modification Blue Clay Road, New Hanover County Dr. Eric McKeithan, President Trustees of Cape Fear Community College 411 South Front Street Wilmington, NC 28401 January 28, 2000 June 18, 2004 Modification Prince George Creek / CPF23 (18-74-53) "C Sw" Pond 1 Pond 2 41.60 9.20 41.60 9.20 0 0 1,268,467 280,526 31,363 0 11,761 23,958 91,040 57,500 22,216 0 0 0 1,112,087 199,068 6.00 5.00 27.50 25.00 96,948 31,061 104,272 25,661 28.55 25.80 3 @ 3.0" cp 1 @ 2.0" cp 105,041 20,404 Page 3 of 9 State Stormwater Management Systems Permit No. SW8 990923 Modification DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: Name of Receiving Stream/Index #: Classification of Water Body: Pond Number Drainage Area, acres: Onsite. Offsite: Total Impervious Surfaces, ft Buildings ft Streets, W: Parking, fl Sidewalk, ft Tennis Court, fl Future Area, iC: Pond Depth, feet: Permanent Pool Elevation, FIVISL: Provided Surface Area, ft2: Provided Storage Volume, ft3: Temporary Storage Elevation, FMSL: Controlling Orifice Pipes: Forebay Volume, ft3: Cape Fear Community College North Campus SW8 990923 Blue Clay Road, New Hanover County Dr. Eric McKeithan, President Trustees of Cape Fear Community College 411 South Front Street Wilmington, NC 28401 January 28, 2000 December 11, 2003 Modification Prince George Creek / CPF23 (18-74-53) "C Sw" Pond 3 Pond 4 40.00 14.48 40.00 14.48 0 0 1,219,680 536,037 1175176 0 74,488 32,060 526,640 0 120,226 0 46,1740 334,976 503,977 5.50 4.50 25.00 27.50 78,605 43,456 99,805 46,300 26.20 28.50 2 @ 3.0110 3.0110 59,461 29,250 Page 4 of 9 State Stormwater Management Systems Permit No. SW8 990923 Modification II. SCHEDULE OF COMPLIANCE The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface except roads. 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. 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 must 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 be allowed in the stormwater treatment system, subject to the following criteria: a. The fountain draws its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. C. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for the fountain's pump is based on t'rie permanent pool volume. The maximurn dump power for a fountain in Pond 1 is 2 horsepower, in Pond 2 is 1/3 horsepower, in Pond 3 is 1 horsepower, and in Pond 4 is %Z horsepower. 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 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. 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. Page 5 of 9 State Stormwater Management Systems Permit No. SW8 990923 Modification 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 of the project area. 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. 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 runoff from all built -upon area within the three specified drainage areas on the project must be directed into the appropriate permitted stormwater control system. 15. The Director may notify the permittee whcn the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the noticc, 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. III. GENERAL CONDITIONS 1. This permit is not transferable to any person or entity without notice to and approval by the Director. 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 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. The permittee is responsible for compliance with ail permit conditions until such time as the transfer is 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. Page 6 of 9 State Stormwater Management Systems Permit No. SW8 990923 Modification 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. Permit issued this the 18th day of June 2004. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Alan W. Klimek, E., irector Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 990923 Page 7 of 9 State Stormwater Management Systems Permit No. SW8 990923 Modification Cape Fear Community College -North Campus Page 1 of 2 Stormwater Permit No. SW8 990923 Modification New Hanover 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: Signature Registration Number Date Page 2 of 2 SEAL Page 8 of 9 State Stormwater Management Systems Permit No. SW8 990923 Modification 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 beer. provided. 11. Required drawdown devices are correctly sized per the approved plans. 12. All required design dcpths 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: NCDLNR-B Q Regional Office Tony Roberts, New Hanover County Building inspector Page 9 of 9 A&K #04008 Date Received Fee Paid Permit Number D O O/ State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): Trustees of Cape Fear Community College 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Dr. Eric McKeithan, President Mailing Address for person listed in item 2 above: 411 South Front Street City: Wilmington State: NC Zip: 26401 Telephone Number: (910) 362-7001 4. Project Name (subdivision, facility, or establishment name — should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Cape Fear Community College - North Campus Campus Loop Access Road and Truck Driver Training Facility 5. Location of Project (street address): On Blue Clay Rd., +/- 650 feet from NC 132 City: Wilmington County: New Hanover 5. Directions to project (ftom nearest major iritersection): Located in southeast corner of intersection of Blue Clay Road and Sidbury Road 7. Latitude: 340 19' 25" Longitude: 770 52' 30" of project Contact person who can answer questions about the project: Name: Phil Norris, P.E. Telephone Number: (910) 343-9653 11. PERMIT INFORMATION 1. Specify whether project is (check one): X 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 Existing permit number N/A And its issue date (if known) N/A 3. Specify the type of project (check one): Low Density X High Density Redevelop General Permit Other 4. Additional Project Requirements (check applicable blanks): CAMA Major X Sedimentation/Erosion Control 404/401 Permit NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. 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 stormwater management for the project. Retention Ponds. 2. Stormwater runoff from this project drains to the Cape Fear River Basin. 3. Total Project Area: 14.48 AC 4. Project Built Upon Area: 85 % 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 informatio for each area provided in the same format as below. IanrAa BsWn Information Area 1 Drainage Area 2 Receiving Stream Name UT Prince George Creek Receiving Stream Class C Swam Drainage Area 630,632 SF / 14.48 AC Existing Impervious * Area 1 0 Proposed Impervious* Area 536,037 SF / 12.30 AC % Impervious* Area (total) 85% Impervious* Surface Area Drainage Area 1 Pro Area 2 On -site Buildings On -site Streets 32,060 SF / 0.736 AC On -site Parkin On -site Sidewalks Other on -site (Future) 503,977 SF / 11.570 AC Off -site 0 Total: 536,037 SF / 12.30 AC Total: �.rgFur V 14a uruu s, ueJirteu as ine oum upon area inceuaing, but not timited to, buildings, roads, parking areas sidewalks, gravel areas, etc. Form SWU-101 Version 3.99 Page 2 of 4 +0110wln, p� �Y KA on Fords 9 Cape Fear Community College Revised Drainage Areas February 28, 2002 (Revised 12/11 /03) Bain Information Drainage Area 1 Drainage Area 2 Drainne Area 3 Receivtng Stream Unnamed Trib to Unnamed Trib to Unnamed Trib to Name Prince George Prince George Prince George Creek Creek Creek Receiving Stream C Sw C Sw C Sw Class Drainage Area 41.60 ac 9.20 ac 40.00 ac Existing -0- -0- -0- impervious Area Proposed 29.12 ac 6.44 ac 28.00 ac Impervious Area % Impervious 6 % 6 % 50.8 % Area Current % Impervious 70 % 70 % 70 % Area Future IMPervilous Surface Area Drainage Area 1 Draina Area 2 Drainage Area 3 On -site Buildings 0.72 ac -0- 2.69 ac On -site Streets 0.27 ac 0.55 ac 1.71 ac Lan -site Parking 2.09 ac 1.32 ac 12.09 ac On -sine Sidewalks 0.51 ac -0- 2.76 ac Tennis Couft. & Walk -0- -0- 1,06 ac Subtotal 3.59 ac 1.87 ac 20.31 ac Other on -sits; Rest of Site is assumed 70,0A impervious 25.53 ac 4.57 ac 7.69 ac Off -Site -0- 1 -0- -0- Total: 29.12 ac 1 6.44 ac 28.00 ac RECEIVED, DEC 1 1 2003 DWQ PROJ # SLU F ggyq Z ,3 7. How was the off -site impervious area listed above derived? N/A IV. 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 attachment. The following covenants are intended to ensure ongoing compliance with state stormwater managementpermit number as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. 2. No more than 536,037 square feet of arty lot shall be covered by structures or impervious materials. Impervious 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 excess of the permitted amount requires a state stormwater management permit modi0cation prior to construction. 5. All permitted runoff from outparcels or future development shall be directed into the permitted 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 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 run with the land, that the required covenants cannot be changed or 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 s-applement form(s) listed below must be submitted for each BUT specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SWU-102 Form SWU-103 Form SWU-104 Form SW-105 Form SWU-106 Form SWU-107 Form SWU-108 Form SWU-109 Wet Detention Basin Supplement Infiltration Basin Supplement Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Underground Infiltration Trench Supplement Neuse River Basin Supplement Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Page 3 of 4 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. 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. • 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 $420 (payable to NCDENR) • Detailed narrative description of stormwater treatment / management • Two copies of plans and specifications, including: Development / Project name Engineer and firm Legend 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 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) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. J. Phillip Norris, P.E. Designated agent (individual or firm): Andrew & Kuske Consulting Engineers, Inc. Mailing Address: 902 Market Street City: Wilmington State: NC Phone: (910) 343-9653 VIII. APPLICANT'S CERTIFICATION Fax: (910) 343-9604 Zip: 28401 I, (print or type name ofperson listed in General Information, item 2) Dr. Eric McKeithan, President , 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, an 2H.1000. Ad the proposed project complies with the requirements of 15A NCAC n Signature: V—J . / v(,'• Date:.!%X-1/0 77 Form SWU-101 Version 3.99 Page 4 of 4 A&K #04008 Permit No. R '?q 01 State of North Carolina (to be provided by DWQ) Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ 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 INFORMATION Cape Fear Community College - North Campus Project Name: Campus Loop Access Road and Truck Driver Training Facility Contact Person: Phil Norris, P.E. Phone Number: (910) 343-9653 For projects with multiple basins, specify which basin this worksheet applies to: !I iPonal 4 elevations Basin Bottom Elevation Permanent Pool Elevation Temporary Pool Elevation areas 23.00 ft. 27.50 ft. 28.50 ft. Permanent Pool Surface Area 43,456 sq. ft. Drainage Area 12.11 ac. Impervious Area 9.69 ac. (floor of the basin) (elevation of the orifices) (elevation of the discharge structure overflow) (water surface area at the orifice elevation) (on -site and off -site drainage to the basin) (on -site and off -site drainage to the basin) volumes Permanent Pool Volume 142,780 cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 46,300 cu. ft. (volume detained above the permanent pool) Forebay Volume 29,250 cu. ft. (approximately 20% of total volume) Other parameters SA/DA' 0.064 (surface area to drainage area ratio from DWQ table) Diameter of Orifice 3.0 in. (2 to S day temporary pool draw -down required) Design Rainfall 1.0 in. Design TSS Removal z 90 % (minimum 85% required) Form SWU-102 Version 3.99 Page 1 of 4 Footnotes: 1. When using the Division SAMA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious % 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 BNT manual provides design tables for both 85% TSS removal and 900% TSS removal. U. 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. a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). b. The forebay volume is approximately equal to 20% 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 ion -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. 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. -ff 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) ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one) ❑ does ® does not incorporate pretreatment other than a forebay. Form SWU-102 Version 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: Auer every significant runoff producing rainfall event and at least monthly: 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 temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative 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 75% 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.) 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 3.38 When the permanent pool depth reads 3.38 feet in the main pond, the sediment shall be removed. feet in the forebay, the sediment shall be removed. BASINDIAGRAM (fill in the blanks) Permanent Pool Elevation 27.50 Sediment Re oval El. 24.13 75° --------------- ---- Sediment Removal Elevation 24.13 Bottom El vation 23.0 5%------------------------------------- Bottom Elevation 23.0 FOREBAY MAIN POND 75% 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These 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 Version 3.99 Page 3 of 4 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. Print name: Dr. Eric McKeithan Title: President Address: 411 South Front Street Wilmington, NC 28401 Phone: Signatl Date: nen 10e1 "Ynnol Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I, ,) U rV (. A CA-tQ (O C;I� , a Notary Public for the State of /V OIZ 714 C4120r_ l M & County of /!f . 14 A y-�O 1 / 61-2. , do hereby certify that 691 e 13 A UC- I l Nil n% Pcrsonally appeared before me this —,-5 day of A /4 V c2OO t/ , and acknowledge the due Execution of the foregoing wet detention basin maintenance requirements. Witness my hand and official seal. SEAL Signature Qa_� 6A_, 61 My commission expires Form SWU-102 Version 3.99 Page 4 of 4 p,1-40 O r/ Ila ob ti i� 4.z a us 1-40 V \ KERR Ay N /-------------------------------- -- -__--, 7 -------------------------------------- ------_----_ - amass arY aea> ass® ® aamr armor aqw tmara 4 _ 71-17- � $ / � I i$ $ $ rNY119 8' MP 30-43 Popvo 3 4*4 � I11 p� VICINITY MAP \ $$ I! $$$ NOT TO SCALE / III I I i 90 POND36 \ t. / + \+ p.risNNC ' ti 322UKAINA"'GE AREA PMKINC - - - - - - - - - - - - - - - - - - - ,, a. '�. r. 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M V E In Q 0 t,y6 N �# o.ss :3 V)UM-Y Z 5' wzoo� _�O srn 3 l_ :�i z z cv�O3 O-sXQ 3 rn3Eau 3 ?5, vi 73 U Z W LLB Z z LiJ Z P 0 IiIII IIiI iI III IIIIIII 1111111 II�`��I� III Il II� PROJECT 04008 DES. JPN CKD: JPN DRWN: BLR DATE: 06-08-04 UND 1 11 ! I I I lj(I / 1 J5 -- o r / / i t 1 I II ifa9\ s 3a.63 oa $ I { I > 3'rri%i�i�r/�/ zr.7o 1!(z1i11t111111 $ y47 / $ $ i i ( 100 0 100 200 300 C t�K/(V °ll11%,/1^lll((( 1/ 5 G"lit )). ; r1 ^tU% NG I i i11 i I SCALE: 1 =100 3r J1.91 � �.6b / _ _ ._ -. _2r - •_' •' � r,28.95 / / 11 /ll 11 r I J) 03 n $ � � � $ �.or-w�-3•-i/�-��e _-\ty�3 4.1�, \\1\\{_""" --'"� /r//�`�1111�i(I�III� I I I I I �l� I 3 rho. �•,�r..-'" _ - zs-..-_ _= _z-'�'--�1-.�-22_ � _ s �, // /� /�,./66/y sr, 3p / .��7` =_' _ _- _ _ _ � `-' " -•�r= �3°_ :;; �_C�j/fir/iii, /r $ $ ( $ $ ?7zs/a / ����� �~�2�=-��-_�'�o�==='�75�•i//�/ III i I I CONSTRUCTION 1M, 65 1NV TOP sTRv • • ?3 18.�R8 8pT 26.64 (fi' ORrFtOfi,/ J6.a $ $ $ $ $ DOCUMENTS SHEET IIj l!�APPROW Oro 4,e,2.5 I)M810NOFINAMOUMM DA- 1 I E -OW - I- NORRIS, KUSKE & TUNSTALL CONSULTING ENGINEERS, INC. 902 MARKET STREET • WILMINGTON, NC 28401 PHONE (910) 343-9653 • FAX (910) 343-9604 June 10, 2004 Mr. Cameron Weaver, Express Review Coordinator NC DENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3845 J. PHILLIP NORRIS, P.E. JOHN A. KUSKE, III, P.E. JOHN S. TUNSTALL, P.E. J.A. KUSKE, P.E. OF COUNSEL .& , (EIVED JUN 11 2004 BY: Re: State Stormwater Express Permit Submittal Cape Fear Community College — North Campus Campus Loop Access Road and Truck Driver Training Facility Wilmington, NC A&K Project No. 04008 Dear Mr. Weaver: Enclosed are two (2) sets of plans for the subject project, one (1) set of calculations, the original Division of Water Quality Stormwater Management Permit application, the original SWU-102 supplement form, one (1) copy of the stormwater narrative and a $4,000.00 check for the express permit review fee. Please review this information for approval and contact us with any questions or comments you may have. Thank you for your assistance on this project. Sincerely, TUNSTALL NEERS, INC. 04008 06-10-04-s-sw express-Itr Enclosures cc: Laurie Munn, Environmental Engineer / NC DENR Carl Brown / Cape Fear Community College STORIN14 : TER SUBMITTAL REQUIREMENTS DETENTION POND �. Site Plan 1. Development/Project Name 2 Desipei=s seal, signature, name and firm. 3. Legend 4. 'North Arrow 5. Location Map with direction, distance to named streets, NCSR numbers. _ 6. Scale 7. Date 8. Revision number and date. 9. Original contours, proposed contours, spot elevations, finished floor elevations. 10. Existing drainage, including off -site. Provide a map of any offsite areas. 11. Property/Project boundary lines, dimensioned. 12. Mean High Water Line, if project is adjacent surface waters. 13. Drainage easements, catch basins, pipe sizes, inverts. 14. Wetlands delineated, or a note on the plans that none exist. Ponds may not be located in a wetland. 15. Details of the road, parking, cul-de-sacs, including sidewalks, curb and gutter.. 16. Drainage area to each pond delineated. 17. Dimensions of the permanent pool. 18 Vegetated filter detail if using 85% TSS. This is NOT a connector ditch. 19. Dimensions of the road, parking cul-de-sacs, sidewalks, and curb and gutter. 20. Unit footprint with dimensions and concrete wood deck areas noted.for apartments or condo development. 21. Forebay at each inlet. (Prefer one inlet) 22 Inlets located such that entire pond is used for treatment and no short-circuiting. 23. Pond/forebay section detail with: Bottom elevation Permanent pool elevation PP Storage pool elevation SP Slopes: 3:1 above permancnt pool Vegetated shelf located below permanent pool, 6:1 slope, with begin and end elevations around main pond. (Not required inside forebay) Forebay bottom elevation, 3:1 slopes, Forebay weir elevation between PP and DP. 24. Outlet structure detail with trash rack and orifice size specified. Maximum trash rack opening size is 4". 25. 26. Note on plans that all roof drains must be directed so as to be picked up by the pond. A 3:1 L:W ratio has been provided for the pond. 27. Maximum average pond depth of 6'. (Parts of pond may be deeper -up to 7.5') 28. Vegetation requirements for pond slopes and wetland species for the 6:1 shelf are listed. Weeping Love grass is not suitable for use in North Carolina. STOIZMWATER SUBMITTAL REQUIREMENTS DETENTION POND (cont) B. Calculations 1. 85% or 90% TSS Chart noted. 2. Pond depth. 3. SA/DA ratio calculation. 4. Required surface area at permanent pool. 5. Provided surface area at permanent pool (Based on pond dimensions) 6. Provided surface area at temporary design pool. 7. Required volume calculation. 8. Provided volume calculation. 9. Orifice size based on required 1" volume, using average head to design pool elevation. 10. Designer=s seal. 11. Built -upon area to each pond. 12. Forebay designed to hold 20% of the permanent pool volume. (Range of 18-22 OK.) 13. Non -erosive flow for 10 yr. storm in the vegetated filter, if using 85% TSS. C. Supporting Documentation 1. Completed permit application and supplement. a. Is the person who signed the landowner or a leasee? Must be landowner. b. All sections and blanks completely filled in. C. Check signature per .1003 (e). Make sure title is provided. d. If agent signs, signatory authorization from owner. e. Wet detention supplement sheet provided. f. Mailing address & phone of applicant- no C/O. g. Verify water body classification. h. Justifications for not meeting a design requirement. i. If a modification, include Designer=s Certification. j. Hand initial design requirements. 2. Proposed deed restrictions �� Pe-►�. � 3 J 2 Lf orb;� o 33k� Cjn , CIRO -f C1 zo -1 Lf (0 0) Date Design NORRIS, KUSKE & TUNSTALL Sheet 902 Market St. CONSULTING ENGINEERS, INC. Wilmington, N.C. 28401 apt Check Job For i Job No, CfV& 0-VW ! VAell )`"r Date Design Sheet 1 NORRIs, KuSKE a TUNSTALL 902 Market St / Of . CONSULTING ENGINEERS, INC. Wilmington, N.C. 28401 Check Job For Job No. 67 iC 7 �j Z'k6- opte', ruer : 4;1 Z- V4, � ':�v ene— I,? F-T �47fdia -4 > Woof " �' '- - Job No. 04008 CFCCTruck Type Ill 24-hr 2 Yr. Storm Rainfall=4.50" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 2 HydroCAD® 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 6/7/2004 Time span=1 1 .00-15.00 hrs, dt=0.01 hrs, 401 points Runoff. by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 2S: CFCC Truck Runoff Area=630,632 sf Runoff Depth=2.43" Tc= i 5.0 min CN=91 Runoff=43.54 cfs 2.938 of Pond 1P: Pond Peak Elev=29.10' Storage=76,761 cf Inflow=43.54 cfs 2.938 of Outflow=12.31 cfs 1.664 of Total Runoff Area=14.477 ac Runoff Volume = 2.938 of Average Runoff Depth = 2.43" 04008 CFCCTruck Type 111 24-hr 2 Yr. Storm Rainfall=4.50" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 3 HydroCAD® 7.01 s/n 000479 ©1986-2004 Applied Microcomputer Systems 6/7/2004 Subcatchment 2S: CFCC Truck Runoff = 43.54 cfs @ 12.20 hrs, Volume= 2.938 af, Depth= 2.43" Runoff by SCS TR-20 method, UH=SCS, Time Span= 11 .00-15.00 hrs, dt= 0.01 hrs Type III 24-hr 2 Yr. Storm Rainfall=4.50" Area (sf) CN Description 536,037 98 Impervious Area 94,595 50 Green Area 630,632 91 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 2S: CFCC Truck Hydrograph 4g .................. " ......_.... _------- -------.... _..-----------......_.;..---------------.... _.--------------- :................................... .................................................................... _ ----.........................---------.............�........-------• 0 Runoff 43.54da 12.20hra 42 " . _ .._ - ;_------- •. _............. e.a11-24-h "2 Y.... Starixi...: 40 ' 38 , -._------------- ------------ i _ ........................ _ --50'�--- c'lllnfa17=. . ................................. ;........Ru Hoff i4r -63® 632 Sf .. . 3, - /� ... `5.... ......... ' _�✓ -------- -_--.-. --Run - ojene=228 -------------------------------- r 26, 24 ----------....------=------------------- Runoff Depth=2:4r3-'-'-..- 22 ............. 20 ..................... Y i :..rir�.. 18 ,6 °- --- ..•_...-....-- _._ _....... - _. �+ _...- ----- ------�+ N91 14 .. 12 10 ': ... ........... ...................... .. ..................... ... . ................. ................... .... ....................._ ........... ;.... 8 ............... ............. 4 , 13 Time (hours) 04008 CFCCTruck Type 1/124-hr 2 Yr. Storm Rainfall=4.50" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 4 HydroCADO 7.01 s/n 000479 ©1986-2004 Applied Microcomputer Systems 6/7/2004 Pond 1 P: Pond Inflow Area = 14.477 ac, inflow Depth = 2.43" for 2 Yr. Storm event Inflow = 43.54 cfs @ 12.20 hrs, Volume= 2.938 of Outflow = 12.31 cfs @ 12.65 hrs, Volume= 1.664 af, Atten= 72%, Lag= 27.2 min Primary = 12.31 cfs @ 12.65 hrs, Volume= 1.664 of Routing by Stor-Ind method, Time Span= 11.00-15.00 hrs, dt= 0.01 hrs Peak Elev= 29.10' @ 12.65 hrs Surf.Area= 52,622 sf Storage= 76,761 cf Plug -Flow detention time= 77.5 min calculated for 1.658 of (56% of inflow) Center -of -Mass det. time= 46.9 min ( 798.5 - 751.6 ) # Invert Avail.Storage Storage Description 1 27.50' 188,321 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 27.50 43,456 0 0 28.50 48,714 46,085 46,085 29.00 51,946 25,165 71,250 29.50 55,234 26,795 98,045 30.00 58,534 28,442 126,487 31.00 65,134 61,834 188,321 # Routing Invert Outlet Devices 1 Primary 27.50' 24.0" x 75.0' long Culvert X 2.00 RCP, groove end w/headwall, Ke= 0.200 Outlet Invert= 27.30' S= 0.0027'/' n= 0.013 Cc= 0.900 2 Device 1 27.50' 2.0" Vert. Orifice/Grate C= 0.600 3 Device 1 28.50' 5.83' x 0.33' Vert. Orifice/Grate X 2.00 C= 0.600 4 Device 1 30.20' 24.0' long x 2.0' high Sharp -Crested Rectangular Weir 2 End Contraction(s) 1.00' Rise 5 Primary 30.50' 40.0' long x 30.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 rimary OutFlow Max=12.31 cfs @ 12.65 hrs HW=29.10' (Free Discharge) 196 =Culvert (Passes 12.31 cfs of 17.30 cfs potential flow) 2=Orifice/Grate (Orifice Controls 0.13 cfs @ 5.9 fps) 3=Orifice/Grate (Orifice Controls 12.18 cfs @ 3.2 fps) -Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 5--Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 12 1'3 14 15 Time (houm) 04008 CFCCTruck Type 111 24-hr 10 Yr. Storm Rainfall=7.00" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 6 HydroCAD® 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 6/7/2004 Time span=11.00-15.00 hrs, dt=0.01 hrs, 401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 2S: CFCC Truck Runoff Area=630,632 sf Runoff Depth=4.03" Tc=15.0 min CN=91 Runoff=71.91 cfs 4.856 of Pond 1P: Pond Peak Elev=29.88' Storage=119,588 cf Inflow=71.91 cfs 4.856 of Outflow=20.55 cfs 3.455 of Total Runoff Area=14.477 ac Runoff Volume = 4.856 of Average Runoff Depth = 4L03" 04008 CFCCTruck Type Ill 24-hr 10 Yr. Storm Rainfal1=7.00" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 7 HydroCAD® 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 6/7/2004 Subcatchrnent 2S: CFCC Truck Runoff = 71.91 cfs @ 12.20 hrs, Volume= 4.856 af, Depth= 4.03" Runoff by SCS TR-20 method, UH=SCS, Time Span= 11.00-15.00 hrs, dt= 0.01 hrs Type III 24-hr 10 Yr. Storm Rainfall=7.00" Area (sf) CN Description 536,037 98 Impervious Area 94,595 50 Green Area 630,632 91 Weighted Average Tc Length Slope Velocity Capacity Description min (feet) (ft/ft) (fttsec) (cfs) 15.0 Direct Entry, Subcatchment 2S: CFCC Truck Hydrograph 20 hrs ....... ype.I1124-hr 1.0 Yr. Storm. ...._-------...._........_........-------.................._......-------..............Rainfall=7T40-'-'-- ........... ............ :........ -Runoff Ar4a=630;632-sf.. ----------- un° Volume=4,l of .. Runoff- Depth -=A,03' _-. r � .Tc=15:O--mfn.. ------------------------------------- 2 13 14 Time (hours) 5 04008 CFCCTruck Type 111 24-hr 90 Yr. Storm Rainfa11=7.00" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 8 HydroCADO 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 6/7/2004 Pond 1 P: Pond Inflow Area = 14.477 ac, Inflow Depth = 4.03" for 10 Yr. Storm event Inflow = 71.91 cfs @ 12.20 hrs, Volume= 4.856 of Outflow = 20.55 cfs @ 12.64 hrs, Volume= 3.455 af, Atten= 71%, Lag= 26.7 min Primary = 20.55 cfs @ 12.64 hrs, Volume= 3.455 of Routing by Stor-Ind method, Time Span= 11.00-15.00 hrs, dt= 0.01 hrs Peak Elev= 29.88' @ 12.64 hrs Surf.Area= 57,734 sf Storage= 119,588 cf Plug -Flow detention time= 74.5 min calculated for 3.453 of (71 % of inflow) Center -of -Mass det. time= 49.8 min ( 800.1 - 750.3 ) # Invert Avail.Stora a Storage Description 1 27.50' 188,321 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum -Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 27.50 43,456 0 0 28.50 48,714 46,085 46,085 29.00 51,946 25,165 71,250 29.50 55,234 26,795 98,045 30.00 58,534 28,442 126,487 31.00 65,134 61,834 188,321 # Routing Invert Outlet Devices 1 Primary 27.50' 24.0" x 75.0' long Culvert X 2.00 RCP, groove end w/headwall, Ke= 0.200 Outlet Invert= 27.30' S= 0.0027'P n= 0.013 Cc= 0.900 2 Device 1 27.50' 2.0" Vert. Orifice/Grate C= 0.600 3 Device 1 28.50' 5.83' x 0.33' Vert. Orifice/Grate X 2.00 C= 0.600 4 Device 1 30.20' 24.0' long x 2.0' high Sharp -Crested Rectangular Weir 2 End Contraction(s) 1.00' Rise 5 Primary 30.50' 40.0' long x 30.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=20.55 cfs @ 12.64 hrs HW=29.88' (Free Discharge) culvert (Passes 20.55 cfs of 30.43 cfs potential flow) 2=0rifice/Grate (Orifice Controls 0.16 cfs @ 7.3 fps) 3=Orifice/Grate (Orifice Controls 20.39 cfs @ 5.3 fps) -Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) -Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 04008 CFCCTruck Type 11124-hr 10 Yr. Storm Rainfall=7.00" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 9 HydroCAD® 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 8/7/9nnA 12 13 14 Time (hours) 04008 CFCCTruck Type N 24-hr 25 Yr. Storm Rainfall=8.05" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 10 HydroCAD® 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 6/7/2004 Time span=11.00-15.00 hrs, dt=0.01 hrs, 401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 2S: CFCC Truck Runoff Area=630,632 sf Runoff Depth=4.69" Tc=15.0 min CN=91 Runoff=83.70 cfs 5.655 of Pond 1P: Pond Peak Elev=30.20' Storage=138,668 cf Inflow=83.70 cfs 5.655 of Outflow=23.09 cfs 4.143 of Total Runoff Area=14.477 ac Runoff Volume = 5.655 of Average Runoff Depth = 4.69" 04008 CFCCTruck Type /// 24-hr 25 Yr. Storm Rainfall=8.05" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 11 HydroCAD® 7.01 s/n 000479 m 1986-2004 Applied Microcomputer Systems 6/7/2004 Subcatchment 2S: CFCC Truck Runoff = 83.70 cfs @ 12.20 hrs, Volume= 5.655 af, Depth= 4.69" Runoff by SCS TR-20 method, UH=SCS, Time Span= 11.00-15.00 hrs, dt= 0.01 hrs Type III 24-hr 25 Yr. Storm Rainfall=8.05" Area (sf) CN Description 536,037 98 Impervious Area 94,595 50 Green Area 630,632 91 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 2S: CFCC Truck Hydrograph -•................. .... .... Type -111-24-hr- 25-%I'r: Storm-- ..... ---------- ---------------------- Rainfall=&051' ......::..::::::Runoff Aroa=630 632-sf... --------- Runoff-V-olu5:655-af ............... .. .......K...................Runoff :�ep�fi:=4�sg"... ---------------- N;=9= 11 12 13 14 15 Time (hours) 04008 CFCCTruck Type M 24-hr 25 Yr. Storm Rainfall=8.05" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 12 HydroCADO 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 6/7/2004 Pond 1P: Pond Inflow Area = 14.477 ac, Inflow Depth = 4.69" for 25 Yr. Storm event Inflow = 83.70 cfs @ 12.20 hrs, Volume= 5.655 of Outflow = 23.09 cfs @ 12.65 hrs, Volume= 4.143 af, Atten= 72%, Lag= 27.3 min Primary = 23.09 cfs @ 12.65 hrs, Volume= 4.143 of Routing by Stor-Ind method, Time Span= 11.00-15.00 hrs, dt= 0.01 hrs Peak Elev= 30.20' @ 12.65 hrs Surf.Area= 59,834 sf Storage= 138,668 cf Plug -Flow detention time= 75.2 min calculated for 4.130 of (73% of inflow) Center -of -Mass det. time= 51.6 min ( 801.7 - 750.1 ) # Invert _Avail.Storage Storage Description 1 27.50' 188,321 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 27.50 43,456 0 0 28.50 48,714 46,085 46,085 29.00 51,946 25,165 71,250 29.50 55,234 26,795 98,045 30.00 58,534 28,442 126,487 31.00 65,134 61,834 188,321 # Routing Invert Outlet Devices 1 Primary 27.50' 24.0" x 75.0' long Culvert X 2.00 RCP, groove end w/headwall, Ke= 0.200 Outlet Invert= 27.30' S= 0.0027 7' n= 0.013 Cc= 0.900 2 Device 1 27.50' 2.0" Vert. Orifice/Grate C= 0.600 3 Device 1 28.50' 5.83' x 0.33' Vert. Orifice/Grate X 2.00 C= 0.600 4 Device 1 30.20' 24ti0' long x 2.0' high Sharp -Crested Rectangular Weir 2 End Contraction(s) 1.00' Rise 5 Primary 30.50' 40.0' long x 30.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=23.09 cfs @ 12.65 hrs HW=30.20' (Free Discharge) culvert (Passes 23.09 cfs of 32.68 cfs potential flow) 2=0rifice/Grate (Orifice Controls 0.17 cfs @ 7.8 fps) 3=Orifice/Grate (Orifice Controls 22.92 cfs @ 6.0 fps) -Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) -Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 04008 CFCCTruck Type M 24-hr 25 Yr. Storm Rainfall=8.05 " Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 13 HydroCADO 7.01 s/n 000479 0 1986-2004 Applied Microcomputer Systems 7/2004 Pond IP: Pond Hydrograph ----------------------- - -- --- -------- ------- -- FrI Mfia—w--i 90 Lfq-_70GfS _Q 12.20 =hra ---------------- --- --------- ------------ ---- ---------------------- 10 Primary 85 ... ....... .......................... Inflow 14," 77""06""' 80 .... .......... ........ ....... ............... . .................. -------- 4 --------- 75 Peak--81ev--30-."'-- ...................................... ...................... --a ................. 70 1 ---------------------------------- 65 --------S-;66$..o- ................................ 60 .......... ............ .......................... .................. 55 ............ ... . .. ....... ..... . .... ...... ................... : .......... .................... 50 ................................. • 45 0 40 ---------- ------- ------------------------ ------ ------- ---------------- ------------ ............ ............ 30 ........... -------------------------------- .................................. 25 23.09crs1 12R1fj 20 ----------------- ------------- --------------- - -------------- -------------- -------------------- 15 -------------------------- 10. 12 13 14 15 Time (hours) 04008 CFCCTruck Type 111 24-hr 100 Yr. Storm Rainfall=10.00" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 14 HydroCAD® 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 6/7/2004 Time span=11.00-15.00 hrs, dt=0.01 hrs, 401 points Runoff by GCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 2S: CFCC Truck Runoff Area=630,632 sf Runoff Depth=5.91" Tc=15.0 min CN=91 Runoff=105.47 cfs 7.132 of Pond 1P: Pond Peak Elev=30.58' Storage=162,635 cf Inflow=105.47 cfs 7.132 of Outflow=41.79 cfs 5.428 of Total Runoff Area=14.477 ac Runoff Volume = 7.132 of Average Runoff Depth = 5.91" 04008 CFCCTruck Type 11124-hr 100 Yr. Storm Rainfall= 10. 00 " Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 15 HydroCAD® 7.01 s/n 000479 ©1986-2004 Applied Microcomputer Systems 6/7/2004 Subcatchment 2S: CFCC Truck Runoff = 105.47 cfs @ 12.20 hrs, Volume= 7.132 af, Depth= 5.91" Runoff by SCS TR-20 method, UH=SCS, Time Span= 11.00-15.00 hrs, dt= 0.01 hrs Type III 24-hr 100 Yr. Storm Rainfall=10.00" Area (sf) CN Description 536,037 98 Impervious Area 94,595 50 Green Area 630,632 91 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) Mtsec) (cfs) 15.0 Direct Entry, 115....-......._._........................ ,._.,.. 95 - ._.... ------ - _. -- ---------- Subcatchment 2S: CFCC Truck Hydrograph -------- ill- 24=h -1,00-Yr.-Storm-- --------------------------------------------- if i ----------------.._..--------------------------------------- l, afIMk1ll-1a:00----- -----------------.......-------------..... ........................................ runoff- eaxS30,.632-sf --------6ICIo�.lIL�17Le7�_.3_11f.._ ...----Ruri:dff _Detl`i=:91 ...: ---------------.... ---------------- ------------- ................. ------------ CN=91... ----------------------------------- ., . -----------�--- ------------------- Time (hours) 4 15 � Runoff 04008 CFCCTruck Type 11124-hr 100 Yr. Storm Rainfall=90.00" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 16 HydroCADO 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 6/7/2004 Pond 1 P: Pond Inflow Area = 14.477 ac, Inflow Depth = 5.91" for 100 Yr. Storm event Inflow = 105.47 cfs @ 12.20 hrs, Volume= 7.132 of Outflow = 41.79 cfs @ 12.55 hrs, Volume= 5.428 af, Atten= 60%, Lag= 21.1 min Primary = 41.79 cfs @ 12.55 hrs, Volume= 5.428 of Routing by Stor-Ind method, Time Span= 11.00-15.00 hrs, dt= 0.01 hrs Peak Elev= 30.58' @ 12.55 hrs Surf.Area= 62,392 sf Storage=162,635 cf Plug -Flow detention time= 69.4 min calculated for 5.424 of (76% of inflow) Center -of -Mass det. time= 47.0 min ( 796.8 - 749.7 ) # Invert Avail.Stora a Storage Description 1 27.50' 188,321 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 27.50 43,456 0 0 28.50 48,714 46,085 46,085 29.00 51,946 25,165 71,250 29.50 55,234 26,795 98,045 30.00 58,534 28,442 126,487 31.00 65,134 61,834 188,321 # Routing Invert Outlet Devices 1 Primary 27.50' 24.0" x 7&0' long Culvert X 2.00 RCP, groove end w/headwall, Ke= 0.200 Outlet Invert= 27.30' S= 0.0027 '/' n= 0.013 Cc= 0.900 2 Device 1 27.50' 2.0" Vert. Orifice/Grate C= 0.600 . 3 Device 1 28.50' 5.83' x 0.33' Vert. OrificelGrate X 2.00 C= 0.600 4 Device 1 30.20' 24L0' long x 2.0' high Sharp -Crested Rectangular Weir 2 End Contraction(s) 1.00' Rise 5 Primary 30.50' 40.0' long x 30.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=41.75 cfs @ 12.55 hrs HW=30.58' (Free Discharge) =Culvert (Barrel Controls 39.11 cfs @ 6.2 fps) 2=Orifice/Grate (Passes < 0.18 cfs potential flow) 3=Orifice/Grate (Passes < 25.66 cfs potential flow) -Sharp-Crested Rectangular Weir (Passes < 19.09 cfs potential flow) -Broad-Crested Rectangular Weir (Weir Controls 2.63 cfs @ 0.8 fps) 04008 CFCCTruck Type l// 24-hr 100 Yr. Storm Rainfall=90.00" Prepared by Andrew & Kuske Consulting Engineers, Inc. Page 17 HydroCAD® 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 6/7/2004 Pond 1 P: Pond Hydrograph ----- .............. .. I --- ------- -------------------------- ----------- 11 12 13 14 Time (hours) NORRIS, KUSKE & TUNSTALL CONSULTING ENGINEERS, INC. 902 MARKET STREET • WILMINGTON, NC 28401 PHONE (910) 343-9653 • FAX (910) 343-9604 June 10, 2004 Mr. Cameron Weaver, Express Review Coordinator NC DENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3845 J. PHILLIP NORRIS, P.E. JOHN A. KUSKE, III, P.E. JOHN S. TUNSTALL, P.E. J.A. KUSKE, P.E. OF COUNSEL RECEIVED JUN 112004 BY: Re: State Stormwater Express Permit Submittal Cape Fear Community College — North Campus Campus Loop Access Road and Truck Driver Training Facility Wilmington, NC A&K Project No. 04008 Dear Mr. Weaver: Enclosed are two (2) sets of plans for the subject project, one (1) set of calculations, the original Division of Water Quality Stormwater Management Permit application, the original SWU-102 supplement form, one (1) copy of the stormwater narrative and a $4,000.00 check for the express permit review fee. Please review this information for approval and contact us with any questions or comments you may have. Thank you for your assistance on this project.. Sincerely, NORRI; CONSU $ TUNSTALL 31NEERS, INC. 04008 06-10-04-s-sw express-Itr Enclosures cc: Laurie Munn, Environmental Engineer / NC DENR Carl Brown / Cape Fear Community College State Stormwater Management Systems Permit No. SW8 990923 DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: . Name of Receiving Streamfindex #: Classification of Water Body: If Class SA, chloride sampling results: Drainage Area, acres: Pond Depth, feet: Permanent Pool Elevation, FMSL: Total Impervious Surfaces, ft2: Buildings, ft2: Streets, ft2: Parking, ft2: Sidewalk, W: Other, ft2: Furore Area, ft2: Offsite Area entering Pond, ft2: Required Surface Area, ft2: Provided Surface Area, ft2: Required Storage Volume, ft3: Provided Storage Volume, ft3: Temporary Storage Elevation, FMSL: Controlling Orifice Pipes: Cape Fear Community College North Campus'` SW8 990923 New Hanover County Dr. Eric McKeithan, President Trustees of Cape Fear Community College 411 South Front Street Wilmington, NC 28401 January 28, 2000 (modified August 21, 2002) Prince George Creek / CPF23 (18-74-53) "C Sw" n/a Pond 1 Pond 2 41.60 9.20 6.00 5.00 27.50 25.00 1,268,467 280,526 31,363 0 11,761 .23,958 91,040 57,500 12,216 0 0 0 1,112,087 199,068 none, per Engineer 70,672 20,038 96,948 31,061 102,685 22,709 104,272 25,661 28.55 25.80 3 @3.0"cp 1 @2.0"q) Pond 3 41.90 5.50 25.00 1,277,615 30,928 34,848 84,506 23,087 46,174 1,058,072 82,132 82,208 103,426 104,366 26.20 2 @ 3.0" cp f 3 `0 0 o� �E9 N A r Michael F. Easley, Governor �uo� William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources August 26, 2002 Dr. Eric McKeithan, President Trustees of Cape Fear Community College 411 South Front Street Wilmington, NC 28401 Alan W. Klimek, P.E., Director Division of Water Quality Wilmington Regional Office Subject: Permit No. SW8 990923 Cape Fear CommunityCollege-North Campus High Density Stormwater Project Dear Dr. McKeithan: New Hanover County The Wilmington Regional Office received a complete modification to the-Stormwater Management Permit Application for Cape Fear Community College -North Campus on August 21, 2002. 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 990923 dated August 26, 2002, for the construction of Cape Fear Community College -North Campus. This permit shall be effective from the date of issuance until January 28, 2010, (10 years from the original issue date) 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 combliance 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 Linda Lewis, or me at (910) 395-3900. Sincerely, Rick Shiver Water Quality Regional Supervisor RSS/arl: S:1WQSISTORMWATIPERNffT1990923.AUG cc: Mark Hargrove, P.E. Tony Roberts, New Hanover County Inspections Beth E. Wetherill, New Hanover County Engineering Linda Lewis Wilmington Regional Office Central Files NLU N.C. Division of Water Qualify 127 Cardinal Drive Extension WENR ilmington, N.C. 28405 (910) 395-3900 Fax (910) 350-2004 Customer Service 800-623-7748 STORMWATER SYSTEM & EROSION CONTROL NARRATIVE CAPE FEAR COMMUNITY COLLEGE - NORTH CAMPUS CAMPUS LOOP ACCESS ROAD AND TRUCK DRIVER TRAINING FACILITY WILMINGTON, NORTH CAROLINA For Trustees of Cape Fear Community College 411 South Front Street Wilmington, NC 28401 (910) 362-7001 June 2004 Prepared by: ANDREW & KUSKE CONSULTING ENGINEERS, INC. 902 Market Street Wilmington, North Carolina 28401 (910) 343-9653 (910) 343-9604 (Fax) E-mail: office@andrewandkuske.com A&K Project No. 04008 NARRATIVE DESCRIPTION: The project site is on a large acreage tract located on Blue Clay Road in New Hanover County, North Carolina. The soils of the site consist of lightly vegetated sandy clay topsoil and grades ranging from 0.5% to 4.0%. Approximately 13 acres will be graded to allow construction of a new parking area and access road. The runoff from the site is estimated using the rational method 10 year design storm and rainfall data for the area. Construction is scheduled to begin as soon as all permits and approvals are obtained. EROSION CONTROL MEASURES: The attached plans and specifications give the requirements for erosion control measures. Silt fencing will be provided where stormwater would be expected to sheet flow from disturbed areas directly to adjacent property. Gravel check dams will not be provided unless the Contractor has to temporarily discharge into an open ditch instead of the proposed storm drain outfall. Detention ponds will be used as silt basins during construction and restored to its design contours prior to completion. A gravel construction entrance will be constructed at the three (3) access points to the site entrance, Maintenance will be provided by the grading contractor and developer. STORMWATER MANAGEMENT MEASURES: The project site is located in New Hanover County. Land disturbina on the site will exceed one acre, which requires the site to comply with the State Regulations. The stormwater runoff from the development will be directed to the new stormwater detention pond #4 and to the three (3) existing detention ponds on the site. The stormwater detention pond was designed to accommodate this site at 35% impervious area lot coverage. CONSTRUCTION SEQUENCE: The Contractor will install the gravel construction entrance and silt fence prior to beginning any clearing and grading operations. Additional silt fence will be installed when and if conditions warrant during construction. The detention pond/silt basin will be constructed immediately after that portion of the site is cleared, and outlet structure with protection will be installed. Disturbed areas will be landscaped or seeded upon completion. MAINTENANCE PLAN 1. All erosion and sediment control practices will be checked for stability and operation following every runoff producing rainfall but in no case less than once every week. Any needed repairs will be made immediately to maintain all practices as designed. 2. Install erosion control measures before beginning construction or as soon thereafter as possible. All erosion and sediment control practices will be checked for stability and operation following every runoff -producing rainfall but in no case less than once every week. Any needed repairs will be made immediately to maintain all practices as designed. 3. Maintain the gravel construction entrances in a condition to prevent mud or sediment from leaving the construction site. The contractor shall inspect the construction entrances on a daily basis. This will require periodic top dressing with additional No. 4 stone. Any objectionable materials spilled, washed, or tracked onto public roadways shall be removed immediately. 4. Install erosion control measures around the drop inlets as shown on the plans to trap silt during construction. Inspect the erosion control around the inlets after each rain and make repairs immediately. Remove sediment when it becomes 0.50 deep to provide adequate storage volume for subsequent rains. When the contributing drainage area has been adequately stabilized, remove all materials and any unstable soil and either salvage or dispose of it properly. Bring the disturbed area to proper grade and appropriately stabilize all bare areas around the drop inlets. 5. Sediment will be removed from behind the silt fence when it becomes 0.5 feet deep at the fence. The sediment fence will be repaired as necessary to maintain a barrier. 6. No cut or fill slopes shall exceed a side slope of 1 vertical to 3 horizontal unless otherwise specified on the plan. All slopes shall be seeded and stabilized within 15 days. 7. The stormwater ponds will act as sediment basins and will be cleaned out when the level of sediment reaches 2.0 ft below the top of the riser. Gravel will be cleaned or replaced when the sediment pool no longer drains properly. 8. No cut or fill slopes shall exceed a side slope of 1 vertical to 3 horizontal unless otherwise specified on the plan. All slopes shall be seeded and stabilized within 15 days. 9. All disturbed areas shall be seeded within 15 days of disturbance. Ali seeded areas will be fertilized, reseeded as necessary and mulched according to specifications in the vegetative plan to maintain a vigorous, dense vegetative cover. 10. More stringent measures shall be used to halt erosion if those shown on this plan are not effective. 11. All erosion shall be controlled including side slopes before the project is completed. 12. Remove temporary measures upon completion of project. All permanent measures will be well established before project closeout. SECTION 02920 SOIL EROSION AND SEDIMENTATION CONTROL 1. GENERAL 1.1 Contractor shall take every reasonable precaution throughout construction to prevent the erosion of soil and the sedimentation of streams, lakes, reservoirs, other water impoundments, ground surfaces, or other property as required by State and Local regulations. 1.2 The Contractor shall install all required silt fences, and construction entrances at the initiation of work, and have these, measures reviewed and approved by the local permit authority prior to clearing and grading operations. 1.3 The Contractor shall, within 15 days of suspension or completion of land disturbing activities, provide permanent protective covering for disturbed areas. Temporary and permanent erosion control measures shall be coordinated to assure economical, effective, and continuous erosion and siltation control throughout the construction and post -construction period. Use the specified seed for both temporary and permanent seeding. 2. PRODUCTS 2.1 Asphalt for anchoring mulch shall be Type SS-1 Emulsion. 2.2 Fertilizer shall be 10-10-10 grade or equivalent. 2.3 Lime shall be dolomitic agricultural ground limestone containing not less than 10 percent magnesium oxide. 2.4 Mulch shall be small grain straw, hay, wood chips, asphalt emulsion, jute or other suitable material free of undesirable weed seed. 2.5 Phosphate shall be 20 percent superphosphate or equivalent. 2.6 Seed shall be 20% carpet grass, 24% Bermuda, 20% turf Fescue, 10% Creeping Red Fescue, and 24% Annual Rye grain. Bermuda seed shall be hulled for warm weather planting and unhulled for cool weather planting. Purity of seed shall be a minimum of 98 percent and germination shall be a minimum of 85 percent. 2.7 Silt fence shall consist of NCDOT Class A fabric supported by wood or metal posts spaced not more than 6 feet on center. The bottom of the fabric shall be buried a minimum of 6 inches. 2.8 Gravel for check dams shall be #57 washed stone. 2.9 Aggregate for construction entrance shall be #4 washed stone. 2.10 Stone rip rap for check dams and erosion control shall be NCDOT Class A or B as shown. 3. EXECUTION 3.1 General: Take every practicable measure during construction or suspension to work to minimize erosion and siltation. Measures should include good construction practices, temporary physical barriers to sediment travel, settling basins for new ditches, and establishment of vegetative cover. 3.2 Construction Practices 3.2.1 Avoid dumping soil or sediment into any wetland or watercourse. 3.2.2 Maintain an undisturbed vegetative buffer where possible between a natural watercourse and trenching and grading operations. 3.2.3 Avoid equipment crossings of streams, creeks, and ditches where practicable. 3.2.4 Grade all cut, fill and ditch slopes to minimum slope of 3:1, unless otherwise shown or directed. 3.3 Temporary Physical Barriers are required where sedimentation on off site property or excessive erosion is a problem. 3.3.1 Mulch shall be used for temporary stabilization of areas subject to excessive erosion and for protection of seedbeds after planting where required. 1. Apply grain straw and hay at a rate of 75 to 100 pounds per 1000 square feet and wood chips at a rate of 500 pounds per 1000 square feet. Jute and mesh should be installed as per manufacturer's instructions. 2. Asphalt emulsion for slope stabilization should be applied at a rate of 1,000 gallons per acre. Asphalt emulsion used for anchoring straw should be applied at a rate of 150 gallons per ton of straw. 3.3.2 Silt Fences shall be used at the base of slopes to restrict movement of sediment from the site. Clean silt fence of accumulated sediment after each rainfall event or when it exceeds a depth of 0.5 feet above natural grade. 3.3.3 Stone Check Dams, placed at the discharges of creeks, ditches, and swales, shall consist of Class A rip rap at minimum two feet high and three feet thick across the watercourse, with a one -foot thick layer of gravel on upstream side. Remove sediment if accumulated to a depth of 1.0 feet at upstream face. 3.4 Vegetative Cover: Establish and maintain permanent vegetative cover on all unpaved areas disturbed by the work. 3.4.1 Preparation of Seedbed: Areas to be seeded shall be scarified to a depth of 4 inches and until a firm, well pulverized, uniform seedbed is prepared. Lime, phosphorous and fertilizer shall be applied during the scarification process in accordance with the following rates: Lime: 45 pounds per 1000 square feet Phosphorous: 20 pounds per 1000 square feet Fertilizer: 17 pounds per 1000 square feet 3.4.2 Seeding: Disturbed areas shall be seeded with 2 to 3 pounds per 1000 square feet of the specified seed mixture. Seed shall be worked into the bed to a depth of 114 inch. Regrade and seed eroded areas immediately 3.4.3 Mulch all areas immediately after seeding. Mulch shall be applied and anchored as specified hereinbefore. Reapply as necessary to retain cover until grass is established. 3.5 Construction Entrance: Provide an aggregate drive, 20 feet wide by 50 feet long by 6 inches thick at each entrance to the site used by construction vehicles, until such time as the permanent roadway is constructed. Remove soil if accumulated to a depth greater than 0.5 inches. 3.6 Maintenance: The Owner and Contractor shall be responsible for maintaining all temporary and permanent erosion control measures. Temporary structures shall be maintained until such time as vegetation is firmly established in the area protected by the structure. Permanent streambank protection and grassed areas shall be maintained until completion of the project. Areas that fail to show a suitable stand of grass or which are damaged by erosion shall be immediately repaired. END OF SECTION Andrew & Kuske CONSULTING ENGINEERS, INC. 902 Market Street Wilmington, NC 28401-4733 910/343 9653 910/343-%W Fa< www.andrewandkL&e.com June 10, 2004 Ms. Laurie Munn NC DENR Division of Water Quality Water Quality Section 127 Cardinal Drive Extension Wilmington, NC 28405-3845 John R. Andrew, P.E. J. Phillip Norris, P.E. John S. Tunstall, P.E. Neal W. Andrew, P.E. John A. Kuske, III, P.E. J.A. Kuske, P.E. of Counsel c7CQ= T.19 �ence 5needen, Jr., P.E.n1:41V TXW Dwe P80d # Re: Cape Fear Community College — North Campus High Density Stormwater Project SW8 990923 Campus Loop Road and Truck Driver Training Facility A & K Project No. 04008 Dear Ms. Munn: _�tv '_ �/w 6 q I0�2.3 As we discussed by telephone on June 10, 2004, we are submitting a fast -tract stormwater permit application for a new retention pond to serve a portion of this new project. A portion of the new project is within the permitted drainage area for Pond #1 and Pond #3 for the subject existing permit (SW8 990923). We are enclosing a copy of the cover letter and data sheet for this permit. The new project will use 55,243 SF of the 1,112,087 SF of future impervious area for Pond #1 and 166,798 SF of the 1,058,072 SF of future impervious area for Pond #3. Please contact us if you have any questions or comments. Thank you for your assistance on this project. Sincerely, ANDREW & KUSKE _Q_ONSULT§JQ_E;NGINEERS, INC N r J. hillip-N6rri%, P-E IWasn 04008 06-10-04-s-sw-high density-Itr cc: Carl Brown / Cape Fear Community College 41 iR i A S .1 0 200 400 800 `� r SCALE 1" = 400' ! NWP Request Land Management Group, Inc. Cape Fear Community Environmental Consultants Wetlands Survey College North Campus Wilmington, N.C. New Hanover County, NC February 11, 2000 Andrew & Kuske CONSULTING ENGINEERS, INC. 902 Market Street Wilmington, NC 28401-4733 910/343-96910/343-9604 Fax www.andrewandkuskg.com June 16, 2004 Ms. Laurie Munn NC DENR Division of Water Quality Water Quality Section 127 Cardinal Drive Extension Wilmington, NC 28405-3845 John R. Andrew, P.E. John S. Tunstall, P.E. John A. Kuske, III, P.E. James T. Pyrtle, P.E. Re: Cape Fear Community College North Campus Campus Loop Access Road and Truck Driver Training Facility New Hanover County SW8 990923 Modification A & K Project No. 04008 Dear Ms. Munn: We are responding to your letter of June 16, 2004 as follows: J. Philllp Norris, P.E. Neal W. Andrew, P.E. J.A. Kuske, P.E. of Counsel C. Lawrence Sneeden, Jr., P.E. 1. The orifice should be 3 inches. We have changed the drawings and are sending two (2) copies of the revised plans. 2. We have shifted the pond to stay outside of the wetland area. We are enclosing two (2) copies of the revised plans. Please continue your review for approval. Thank you for your assistance on this project. Sincerely, ANDREW & KUSKE CONSULTING ENGINEERS, a 04008 06-16-04-s-sw response-ftr cc: Carl Brown / Cape Fear Community College gE;CEIv ri„ Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E.,Director Division of Water Quality Coleen H. Sullins, Deputy Director Division of Water Quality June 16, 2004 Dr. Eric McKeithan, President Trustees of Cape Fear Community College 411 South Front Street Wilmington, NC 28401 Subject: REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SW8 990923 Modification Cape Fear Community College — North Campus Campus Loop Access Road and Truck Driver Training Facility New Hanover County Dear Dr. McKeithan: The Wilmington Regional Office received a Stormwater Management Permit Application for Cape Fear Community College — North Campus, Campus Loop Access Road and Truck Driver Training Facility on June 11, 2004. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stoimwater review: 1. The outlet control structure calls for a 2" diameter orifice while the calculations and, supplement call for a 3" orifice. Please confirm the correct orifice diameter orifice. 2. The originally permitted plans (Jan. 28, 2000) show a wetland delineation. From this delineation, it appears that portions of Pond #4 are in the wetlands. Please provide the signed jurisdictional determination from the Corp of Engineers. 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 June 23, 2004, or the application ,%rill 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 at 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. N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service 'n Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax 1 800 623-7748 Dr. Eric McKeithan Page 2 June 16, 2004 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, C5 � Laurie Munn Environmental Engineer RSS/:lsm S:\WQS\STORMWAT\ADDINFO\2004\990923mod.junO4.doc cc: Laurie Munn Phil Norris, P.E. OAK Win - tell, -%N " / -~^ - ^ ''' -_--.-- � ~~ ^ " 000-� 0 (&-I- Ft An . if ,if j i � ,;: vDS •,NDS WETLANDS No i I WETLANDS f I I UPLANDS .12 dr • 1 I r �, st i I �� WE I LA P. 1 COMMUNICATION RESULT REPORT ( !UN.16.2004 11:20AM ) TTI NCDENR WIRO FILE MODE OPTION ADDRESS (GROUP? RESULT PAGE-- ----------------------- ---------------------- ------------------------------------------------- 587 MEMORY TX 9-3439604 OK P. 9/9 REASON FOR ERROR E-1) HANG UP OR LINE FAIL E_-2j BUSNO FACSIMILE CONNECTION E-3) NO ANSWER irate Of North Carolinh Deparunent of Environment and Natural Resources Wilmington Regional Office Michael F. Easley, Governor William G. Ross Yr., Secretary Date: j O To: CO: FAX REMARKS FAX COVER SHEET No. Of Pages: From: ►,�,-t'�.Q.n CO: FAX#: 910-350-2004 Ur •hh.Q SS 0 M 0 v L . � e Coo i-g f i ke it r r ►V G[u 727 Cardinal Drive Esteoslon, Wilmin' 9 0s, N.C. 20405.3945 Telephone (910) 30-F.3900 Par (910) 350.2004 An Cqual Dppgrtunity AR[rmnttVe Action l rnpleyer State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office Michael F. Easley, Governor William G. Ross Jr., Secretary Date: I (� To: hp v r-L S CO: FAX #: '7� I-(6— LIN REMARKS: FAX COVER SHEET No. Of Pages: From:1 CO: FAX#: 910-350-2004 - of y° (.c �- _ram ss aide. �, o a- - w, o v L' 'Gin d � unfit .t�� .O e " W IA 4WI? i f 0 it / Y lL-y( t CCl kSy res S . u w j) Oki IA 127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 Telephone (910) 395-3900 Fax (910) 350-2004 An Equal Opportunity Affirmative Action Employer P��t `fhz rood (n WtYA. Ja.lj i-CAMS l COW 4D Ck SC 55- o t't (I die'. ,. t4 06/17/2004 TUU 13:37 FAX 910 343 9604 Norris, Kuske, Tunstall = Andrew & Kuske CONSULTING ENGINEERS, INC. John R. Andrew. P.E. 902 Market 5ireetWimington, NC 28401-4733 John A. Kusk . hi . P.E. John A. Kusice.111, P.E. 910/34a9653 91013434604 Faoc www.ondcewondWiske.corn James 7. Pyrtle, P.E. June 16, 2004 Ms. Laurie Munn NC DENR Division of Water Quality Water Qual'Ity Section 127 Cardinal Drive Extension Wilmington, NC 28405-3845 Re: Cape Fear Community College — North Campus Campus Loop Access Road and Truck Driver Training Facility New Hanover County SW8 990923 Modification A 8r K Project No. 04008 Dear Ms. Munn: J. Phlinp Norris, P.E. Neal W. Andrew, P.E. J.A. Kuske, P.E. of Counsel C. Lawrence Sneeden, Jr., RE We are responding to your letter of June 16, 2004 as follows: 1. The orifice should be 3 inches. We have changed the drawings and are sending two (2) copies of the revised plans. 2. We have shifted the pond to stay outside of the wetland area. We are enclosing two (2) copies of the revised plans. Please continue your review for approval. Thank you for your assistance on this project. Sincerely., ANDREW 8r KUSKE CONSULTING ENGINEERS, INC. J Phi ' orris, P. o4wa 06-1644.s-m response-ltr cc: Carl Brown / Cape Fear Community College