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HomeMy WebLinkAboutSW7070724_CURRENT PERMIT_20071105STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. DOC TYPE CURRENT PERMIT rOAPPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 7��D YYYYMMDD i Y r Attn.: Michael A. Rogers 328 South Front Street New Bern, NC 28560 Dear Mr. Rogers: wa-� Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleen H. Sullins, Director Division of Water Quality November 5, 2007 Subject: Stormwater Review SW7070724 Whitfield Landing — A Planned Unit Development High Density Craven County The Washington Regional Office received a completed Stormwater Application for the subject project on August 10, 2007. 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. SW7070724 dated November 5, 2007 to Michael A. Rogers for a wet detention pond to serve the Whitefield Landing Subdivision, located at Neuse Boulevard, New Bern, NC. This permit shall be effective from the date of issuance until November 5, 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. The issuance of this permit does not resolve any previous violations of the stormwater rules for construction without a permit. 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 150E of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. 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 Ernest Odei- Larbi or me at (252) 946-6481. (Sincerely, f Al odge, egional Supervisor Surface Water Protection Section Washington Regional Office cc: John K. Avolis, P.E., Avolis Engineering, and P.A. Craven County Planning/Inspection Washington Regional Office Central Files North Carolina Division of Water Quality Internet: w nmaterquality ore One 943 Washington Square Mall Phone (252) 946-6481 NorthCarohna Washington, NC 27889 Fax (252) 946-9215 Naturally An Equal Opportunity/Affirmalive Action Employer -50%Recycled/10% Post Consumer Paper State Stormwater Management Systems, Permit No. SW7070724 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 Whitfield Landing — A Planned Unit Development Craven County FOR THE construction, operation and maintenance of stormwater management systems in compliance with the provisions of 15A NCAC 21-1.1000 (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 a wet detention pond to serve the Whitfield Landing Subdivision located at Neuse Boulevard, New Bern, NC. This permit shall be effective from the date of issuance until November 5, 2017 and shall be subject to the following specified conditions and limitations: 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. 3. A maximum of 72,204 square feet of built upon area is allowed on this 4.96 acre site. 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with approved plans. 5. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. State Stormwater Management Systems Permit No. SW7070724 DIVISION OF WATER QUALITY WET DETENTION POND - PROJECT DATA Project Name: Whitfield Landing —A Planned Unit Development Permit Number: SW7070724 Location: Craven County Applicant: Michael A. Rogers Mailing Address: 328 South Front Street New Bern, NC 28560 Application Date: 08/10/2007 Receiving Stream: Neuse river Classification of Water Body: SC; Sw; NSW Total Site Area: 4.96 ac Drainage area: 4.96 ac Total Impervious allowed on site: 72,204 sf Wet Pond Depth: 8 ft Required Storage Volume: 9,493 cf Provided Storage Volume: 9,493 cf Required Surface Area: 1,945 sf Provided Surface Area: 8,194 sf Controlling Orifice: 1" diameter @ elevation 93 ft. Temporary Storage Elevation 93 ft. 3 State Stormwater Management Systems Permit No. SW7070724 6. 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. 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. 8. 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 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: 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. State Stormwater Management Systems Permit No. SW7070724 A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life of the permit. III. GENERAL CONDITIONS This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143- 215.6(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. 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 permit may be modified, revoked and reissued or terminated for cause. The fling of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 6. The Permittee, at least six (6) months prior to the expiration of this permit, shall submit in writing a request for an extension along with appropriate application fee. Permit issued this the 5th day of November 2007. CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Coleen H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7070724 State Stormwater Management Systems Permit No. SW7070724 Whitefield Landing- A Planned Unit Development High Density Project Designer's Certification Registered Professional Engineer (periodically/weekly/full time) the construction of the project, as a duly in the State of North Carolina, having been authorized to observe (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. Signature Registration Number Date 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. All roof drains are located such that the runoff is directed into the system. _5. The outlet/bypass structure elevations are per the approved plan. _6. The outlet structure is located per the approved plans. _7. Trash rack is provided on the outlet/bypass structure. _8. All slopes are grassed with permanent vegetation. _9. Vegetated slopes are no steeper than 3:1. _10. The inlets are located per the approved plans and do not cause short-circuiting of the system. _11. The permitted amounts of surface area and/or volume have been provided. _12. Required drawdown devices are correctly sized per the approved plans. _13. All required design depths are provided. _14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. _15. The required system dimensions are provided per the approved plans. 0 tl State of North Carolina SWi4 F/13/O'% 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) Michael A. Rogers & Robert Edwards 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): ` Michael A. Rogers, Owner 3. Mailing Address for person listed in item 2 above: 1'¢1'S-A3LmSd��arte a2g <ot.i)n �rnr j S}rPPi City: New Bern State: NC Zip: -R856i- 7 tz6:6,n Telephone Number: ( 252 ) 636-3500 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications. letters, operation and maintenance agreements, etc.): Whitfield Landing - A Planned Unit Development 5. Location of Project (street address): Neuse Boulevard City: New Bern County: Craven 6. Directions to project (from nearest major intersection): South Glenburnie Road to Neuse Boulevard. Turn left onto Neuse Boulevard. Project is approximately 1.2 miles on right 7. Latitude: N35'-8.149 t Longitude: W770-5.772 t of project 8. Contact person who can answer questions about the project: Name: Michael A. Rogers Telephone Number: ( 252 )636-3500 II. PERMIT INFORMATION: 1. Specify whether project is (check one): Form SWU-101 Version 3.99 X New Renewal Page 1 of 4 Modification 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 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 . See narrative.- 2. Stormwater runoff from this project drains to the Neuse 3. Total Project Area: 4.96 acres 5. How many drainage areas does the project have? River basin. 4. Project Built Upon Area: 33.4 % 6. Complete the follo%%ing 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. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Neuse River Receiving Stream Class SC SW, NSW Drainage Area 4.96 AC Existing Impervious Area 0 Proposed Impervious'Area 72 204 SF 1.66 AC % Impervious Area (total) 133.1% Impervious Surface Area Drainage Area I Drainage Area 2 On -site Buildings 30 713 SF On -site Streets 19,209 SF On -site Parking 20,387 SF On -site Sidewalks 1,895 SF Other on -site Off -site Total: 72,204 SF, 1. AC Total: Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. FormSWU-101 Version3.99 Page 2of4 7. How was the off -site impervious area listed above 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. L 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 pool "No more than 72,204 SF, lk Acres from entire site. 3. Swales shall not be Tlcd i,-,, piped, or a;tered eALtpt as necessary to provide unvetsay 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 Infiltration 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 FormSWU-101 Version3.99 Page 3of4 `i VI., SUBMITTAUREQUIREMENTS 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. I. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Original and one co Initials g� copy of the Stonnwater Management Permit Application Form One copy of the applicable Supplement Form(s) for each BMP �y 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): Avolis Engineering, P.A. Mailing Address: P.O. Box 15564 City: New Bern State: NO Zip: 23561 Phone: (_ 252 ) 6 3-006B Fax: ( 252 ) 633-6507 VIII. APPLICANT'S CERTIFICATION 1, (print or type name of person listed in General Information, item 2) Michael A. Rogers certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of I5A NCAC 2H.1000 . ' Signature: _I Date: Michael A. Rogers, Owner Form SWU-101 Version3.99 Page 4of4 PennitNo. (ro be provided by D 11'O/ StateofNorth Carolina 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 AUG 1 0 2007 DA' S'�Irmwater Management Plan Review A comt,leie stormwater management plan submittal includes an application form, a suet detention basin .supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. I. PROJECT 1NFOR1\1ATION Project Name: Whitfield Landing — A Planned Unit Development Contact Person: M; chap] A Rogers Phone Number: ( 252 ) 636-3500 For projects n'ith multiple basins, specify which basin this svorksheet applies to: elevations Basin Bottom Elevation 85.0 ft. (floor ofthe basin) Permanent Pool Elevation 93,0 ft. (elevation of the orifice) Temporary Pool Elevation 94,1 ft.(cie)-ationofthe disc hargesn-uclWeorel-flo1i) :Wcas Permanent Pool Surface Area 8,194 sq. ft. (rioter surface area at the orifice e(erorion) Drainage Area 4966 ac. (at -site and off -site dr-aina.�e 10 the basin) impen-ious Area 1.66 ac. (on -site and off -site drainage 10 the basin) vohnnes Permanent Pool Volume 32,298 cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 9, ,93 cu. ft. (volume detained above the permanent pool) Forebay Volume 6,945 ,4cu. ft. (approximately _ 0% of rota( vohune) Other parameters SA DAt 0.90 (surface arQa to drainage area ratio fi-oni DWO table) Diameter of Orifice 1.25 in. (2 to 5 day temporaly pool drain -down requirea) Design Rainfall 1 in Design TSS Removal'- 90 % (mininnan 85% required) Form S\VU-102 Rev 3.99 Pare I of 4 Fontnotes: When using the Division SA/DA 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. In the 20 coastal counties, the requirement for a veectative filter may be waived if the wet detention basin is designed to provide 90%TSS removal. The NCDENR BA1P manual provides design tables for both 85% TSS removal and 90° o TSS removal. 11. 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.desionated an agent in the Stormwater Management Permit application Form, the agent may initial below. If a requirement has not been met, attach justification. Applicants Initiah 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 non -erosive flow calculations) f. The basin length to width ratio is greater than 3: I. g. The basin side slopes above the permanent pool are no steeper than 3: 1. h. A submersed and vegetated perimeter shelf with a slope of 6: 1 or less (show detail). i. Vegetative cover above the permanent pool elevation is specified. j. A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. 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. III. NV'ET 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) Rai OCdoes not incorporate a vegetated filter at the outlet. This system (check one) ORIM 01does not incorporate pretreatment other than a forebay. Form S WU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: After 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 the temporary pool occurs within 2 to 5 days as designed. ?. 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. 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 6.0 feet in the main pond, the sediment shall be removed. \\ hen the permanent pool depth reads 6.0 feet in the forebay. the sediment shall be removed. BASIN DIAGR3k:1l !fill in the blanks/ p I Permanent Pool Elevation 93 Sediment Re oval El. 81 7.0 75 o 8%.0 -------------- - Sediment Removal Elevation J0,16 Bottom Ele •ation 85 11 %-------------------------------- ---------Bonom Elevation 85 FOREBAY MAIN POND 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 Rev 3.99 Pace 3 of 4 7. - All components of the wet detention basin system shall be maintained in good working order. I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance procedures listed above. 1 agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print name: Michael A. Rogers Title: Owner 1415 Alexander Lane, New S NNe: The leeally responsible pany should not be a homeow resident of the subdivision has been named the president. NC 28562 unless more than �0% of the lots have been sold and a I. Beth Simmons . a Notary Public for the State of North Carolina County of Craven do hereby cenify that nMi!chael—A—Ragers fir, knvir A,iO1 s personally appeared before me this Il` d&y of � , and acknowledge the due e.eecution of the forgoing %%et detention basin maintenance requirements. Wimess my hand and official seal. NOTARY PUBLIC s SEAL My commission expires April 22, 2009 Form SWU-102 Rev3.99 Nee 4 of 4