Loading...
HomeMy WebLinkAboutSW7060809_CURRENT PERMIT_20070306STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYM M D D Elizabeth City Attn: Mr. John 1704 Weeksville Elizabeth City, Dear Mr. Smith: Wa-Rn 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 DIVISION OF WATER QUALITY March 6, 2007 State University N. Smith Road NC 27909 Subject: Stormwater Permit No. SW7060809 New 274 Bed Dormitory High Density Stormwater Project Pasquotank County The Washington Regional Office received revised plans and supporting information for the subject project on December 28, 2006. It has been determined that this project will comply with the Stormwater Regulations set forth' in Title 15A NCAC 2H.1000. We are forwarding Permit SW7060809 dated March 6, 2007 to Elizabeth City State University for the construction and operation of a wet detention pond to serve the New 274 Bed Dormitory located at Elizabeth City, NC. This permit shall be effective from the date of issuance until March 6, 2017, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611- 7447. Unless such,demands are made this permit shall be final and binding. North Carolina Division of Water Quality Internet: h2o. an r. state. nc.us 943 Washington Square Mall Phone. 252-946-6481 Washington, NC 27889 FAX 252-946-9215 An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper Nne orthCarolina Naturally Elizabeth City State University March 6, 2007 Page Two If you have any questions, or need additional information concerning this matter, please contact Bill Moore at (252) 948- 3919. Sincerely, //. �l Regional 9 Al Hod e, Re Supervisor g Surface Water Protection Section Washington Regional Office cc: McDowell & Associates Elizabeth City Planning/Inspections Washington Regional Office Central Files State Stormwater Management Systems Permit No. SW7060809 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 PERMISSION IS HEREBY GRANTED TO Elizabeth City State University Pasquotank County FOR THE construction, operation and maintenance of stormwater management systems 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 for grass swales, vegetated buffers and a wet detention pond to serve the New 274 Bed Dormitory located at Elizabeth City State University. This permit shall be effective from the date of issuance until March 6, 2017, 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 4 of this permit, the Project Data Sheet. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 3 DIVISION OF WATER QUALITY PROJECT DATA Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: Receiving Stream: Stream Classification: Total Site Area: Total Impervious: Area Allowed Pond Depth: Required Storage Volume: Provided Storage Volume Required Surface.Area: Provided Surface Area: Controlling Orifice: New 274 Bed Dormitory SW7060809 Pasquotank County Elizabeth City State University 1704 Weeksville Road Elizabeth City, NC 27909 08/11/2006; original 12/28/2007;.complete Charles Creek C-Sw 14.2 acres 4.9 acres existing 2.2 acres new 6.0 ft 25,773 cf 51,159 cf 16,700 sf 19,794 sf drawndown orifice 4.0-inch at elevation 3.60 ft. 0 4. No homeowner/lot owner/developer shall be allowed to fill in, alter, or pipe any vegetative practices (such as swales) shown on the approved plans as part of the stormwater management system without submitting a revision to the permit and receiving approval from the Division. 5. 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 e. Further subdivision of the project area. In addition, the Director may determine that other revisions to the project should require a modification to the permit. 6. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. II. SCHEDULE OF COMPLIANCE 1. The permittee will comply with the following schedule for construction and maintenance of the stormwater management system. a. 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 surfaces except roads. b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 2. The facilities must be properly maintained and operated at all times. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency including, but not limited to: 5 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. 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. 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. 6. Upon completion of construction 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. Mail the Certification to the Washington Regional Office, 943 Washington Square Mall, Washington, North Carolina, 27889, attention Division of Water Quality. 7. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of five years from the date of the completion of construction. III. GENERAL CONDITIONS 1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee, documentation from the parties involved, and other supporting materials as may be appropriate. The approval 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 143-215.6(a) to 143-215.6(c). 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. 6 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. S. 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. 6. At least six months prior to the expiration date, the permittee must submit a written request for permit renewal to the Division of Water Quality, Washington Regional Office. . Permit issued this the 6 th day of March, 2007. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Alan W. Klimek, P.E. Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7060809 7 Stormwater Permit No. SW7060809 Elizabeth City State University New 274 Bed Dormitory Swales, Vegetated Buffers, and Wet Pond Pasquotank County Designer's Certification I, , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, for (Project) (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. Signature Registration Number Date L"/P A :. t�;r&f ,,,�w°�...ti"..'I'". `_• OFFICEUSE'ONEy v ' Date Received Fee Paid Permit Number 1 1 2006 State of North Carolina SWACK Department f 12hvironment and Natural Resources V ;ty �•� s ivision of Water Quality V STORMWATER MANAGEMENT PERMIT APPLICATION FORM �, 1/�J P ✓ A0, This forrn may be photocopied for use as an original FAJ�L L GENERAL INFORMATION 1. .Applicants name (specify the name of the corporation, individual, etc. who owns the project): Elizabeth City State -University 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): John N. Smith Director of Design & Construction 3. Mailing Address for person listed in item 2 above: 1704 Weeksville Road City: Elizabeth City State: NC Telephone Number: Zip: 27909 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Erosion Control & Storm Water Management Facilities for Proposed Site Improvements Associated with'New 274 Bed Dormitory, Elizabet City State University 5. Location of Project (street address): 6. Directions to project (from nearest major intersection): 500 feet (+/- south of intersection of Herrington Road and Halstead Boulevard 7. Latitude: 360 17" Longitude: 760 13, of project 8. Contact person who can answer questions about the project: Name: Don A. Bunch II. PERMIT INFORMATION: 1. Specify whether project is (check one) Telephone Number: ( 252 ) 338-4161 xx New Renewal ,Modification Form SWU-101 Version 3.99 Page 1 of 4 r 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) 3. Specify the type of project (check one): _Low Density xxx High Density Redevelop _General Permit _Other 4. Additional Project Requirements (check applicable blanks): _CAMA Major Sedimentation/Erosion Control /401 Permit _NPDES Stonnwater 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. Wet detention pond with no vegetative filter, designed to remove 90% TSS 2. Stormwaterrunofffrom thisproject drains tothe Charles Creek/Pasguotan] verbasin. 3. Total Project Area: 14 2 acres 5. How many drainage areas does the project have? 1 4. Project Built Upon Area: 5 0 '� % 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basrn Infomtation `' r Receiving Stream Name Drama e Areal :� P> "s Draumage Area 2 t , Receiving Stream Class C—Sw Drainage Area 14.2 Existing Impervious* Area 4.9 acres Proposed Im ervious'Area 2 2 % Impervious* Area (total) t5 OT✓ �• f �' i� �Dratna` eArea1,v y ' erviousSifrface9Area�_n..� g >-' Draznage Areal �r On -site Buildings 2 .60 On -site Streets 1 .10 On -site Parking 2.90 On -site Sidewalks 0 .50 Other on -site Off -site Total: Total: Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form SWU-101 Version 3.99 Page 2 of 4 7. How was the off -site impervious area listed above derived? 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. 1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. 2. No more than square feet of any lot shall be covered by structures or 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 modification 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 supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SWU-102 Wet Detention. Basin Supplement Form SWU-103 hrfiltration Basin Supplement Form SWU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off -Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Supplement Form SWU-109 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. Initials • Original and one copy of the Stormwater Management Permit Application Form • One copy of the applicable Supplement Form(s) for each BMP BA-10? • 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 - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) 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. Designated agent (individual or firm): Mnnowell 9 Associates, P.A. Mailing Address: Box 391 City: Elizabeth City 5taILT.' NC- Zsp. 27909 Phone: ( 252 ) 338-4161 Fax: ( 252 l 335-9585 VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) John N. Smith certify that the information included on this permit application form is, to the best of my knowledge, gorrect and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A NCAC 2H .1000.E A Signature: Date: 0 — V - 06 Form SWU-I OI Version 399 Page 4 of 4 e Permit No. State of North Carolina Department of Environment and Natural Resources Division of Water Quality (to be provided by DWQ, STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. I. PROJECT INFORMATION Erosion Control & Storm Water Management Facilities for Proposed Project Name: Site Improvements Associated with New 274 Bed Dormitory, Elizabeth Contact Person City SDon A University unch Phone Number: ( 252) 338-41 61 For projects with multiple basins, specify which basin this worksheet applies to: n/ a elevations Basin Bottom Elevation (- ) Permanent Pool Elevation Temporary Pool Elevation ft. (floor of the basin) ft. (elevation of the orifice) S.8S ft. areas Permanent Pool Surface Area 19,794 sq. ft. Drainage Area Impervious Area volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume Other parameters SA/DA 1 Diameter of Orifice Design Rainfall Design TSS Removal 2 14.2 ac. ac. (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) 58,549 cu. ft. (combined volume of main basin and forebay) 51 1-94 — cu. ft. (volume detained above the permanent pool) 15,076 cu. ft. (approximately 20% of total volume) 2.7 ✓ (surface area to drainage area ratio from DWQ table) 4 ? in. Y temporary 2 to 5 day P ry pool draw -down required) in. 90 % (minimum 85% required) Fomi SWU-102 Rev 3.99 Page 1 of 4 Footnotes: l When using the Division SAIDA tables, the correct SAIDA 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 90010 TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal. ft. 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. Applicants Initials DAE5 a. Dh8 b. PAO C. 0,40 d. Dlk.B e. r�8 If The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). The forebay volume is approximately equal to 20% of the basin volume. The temporary pool controls runoff from the design storm event. The temporary pool draws down in 2 to 5 days. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) The basin length to width ratio is greater than 3:1. The basin side slopes above the permanent pool are no steeper than 3:1. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). 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. PA J5 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. * in. A mechanism is specified which will drain the basin for maintenance or an emergency. *Natural elevations do not allow gravity drainage on pond - pump will be used as necessary for removing water for maintenance III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one) 0 does x)Woes not incorporate a vegetated filter at the outlet. This system (check one) 0 does xV-does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 - Page 2 of 4 7. All components of the wet detention basin system shall be maintained in good working order. I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Tide: Direr t-nr of Deg ern and r nn gt rnrti nn., F1 i vahath f it- Si gta ttni versity Address: 1704 Weeksville Road, Elizabeth City, NC 27909 Note: The legally responsible parry 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. County of do hereby certify th t�22Z b 0 - personally appe d before me this _ day of I and acknowledge the due execution of the forgoing wet detention basin maintenance equirements. Witness my hand and official seal, Lp /)�&/ � SEAL My commission expires 0 -/ —/o Form SWU-102 Rev 3.99 Page 4 of 4 Maintenance activities shall be performed as follows: l . After every significant runoff producing rainfall event and at least month-ly: 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 diawdown of the 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. st6ckpiling 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 4 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads Sediment Bottom El. 0.60 on - 0.4( FOREBAY 3 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 3.60 Sediment Removal Elevation -0 .90 l 75%a Bottom Elevation -2.40 ♦25% MAIN POND 5. Remove cattails and other indigenous wetland plants when they cover 50010 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 Rev 3.99 Page 3 of 4