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HomeMy WebLinkAboutSW7100113_CURRENT PERMIT_20080520STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. I SW DOC TYPE CURRENT PERMIT rAPPROVEDPLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD kkm ArFq OG Michael F. Emley, Governor William G. Ross Jr., Secretary r- North Carolina Department of Environment and Natural Resources i � Coleen H. Sullins Director Division of Water Quality May 20, 2008 Mr. Chris Fulcher PO Box 250 Oriental, NC 28570 Subject: Stormwater Permit No. SW7080113 Gideon Creek Marina High Density Project Pamlico County Dear Mr. Fulcher: The Washington Regional Office received a complete Stormwater Management Permit Application for the subject project on April 2, 2008. 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. SW7080113 dated May 20, 2008, for the construction f th subject project. This permit shall be effective from the date of issuance until May 20, 2018, 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, 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 Bill Moore, or me at (252) 946-6481. incerel ,N � rrrr- AI Hodge Regional Supervisor Surface Water Protection Section cc: Avolis Engineering Pamlico County Planning/Inspections Division of Coastal Management t,,Washington Regional Office Central Files North Carolina Division of Water Quality Internet: h2o.encstate.nc.us 943 Washington Square Mall Phone: 252.946-6481 Washington, NC 27889 FAX 252-946-9215 An Equal Opportunity/Affrmative Action Employer — 50% Recycled/10% Post Consumer Paper One NorthCarolina Naturallt, 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 Mr. Chris Fulcher Gideon Creek Marina Pamlico County FOR THE construction, operation and maintenance of vegetated buffers and (1) infiltration basin in compliance with the provisions of 15A NCAC 2H A 000 (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 Gideon Creek Marina located on Orchard Creek Road near Oriental, NC. This permit shall be effective from the date of issuance until May 20, 2018, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 on page 3 of this permit. The stormwater controls have.been designed to handle the runoff from 49,261 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 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 the approved plans. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. 6. The following design criteria have been provided in the infiltration basin and must be maintained at design condition: a. Drainage Area, acres: 5.67 acres Total East Drainage Basin 3.30 acres West Drainage Basin 2.37 acres b. Total Impervious Surfaces, ftz: 0.41 ac - East Basin 0.72 ac - West Basin C. Design Storm, inches: 1.5 - inches d. Basin Depth, feet: 1.2 ft e. Bottom Elevation, FMSL: 3.0 ft f. Bottom Surface Area, fe: 4841 sf g. Bypass Weir Elevation, FMSL: 3.85 ft h. Permitted Storage Volume, W: 5330 cf Receiving Stream/River Basin: Gideon Creek/Neuse Classification of Water Body: SA,HQW,NSW 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. 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 slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of bypass structure, infiltration media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass 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. 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. 6. 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. A modification may be required for those deviations. 7. 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. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 9. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. „ C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. filling in, altering, or piping of any vegetative.conveyance shown on the 'approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 11. A copy of.the approved plans and specifications shall be maintained on file by the permittee at all times.. 12. 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. III. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, 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 all permit conditions until such time as the Division approves the transfer request. 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) having 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 during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. 10. This permit shall be effective from the date of issuance until May 20, 2018. Application for permit renewal shall be submitted 180 days prior to the expiration date of this permit and must be accompanied by the processing fee. Permit issued this the 20 day of May, 2008. CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Division of Water Quality By Authority of the Environmental Management Commission Gideon Creek Marina Stormwater Permit No. SV 7080113 Pamlico 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 the following attachment must be included in the Certification. Any modifications/deviations from approved plans and specification must be noted and explained. SEAL Signature Registration Number Date Certification Attachment 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 bypass structure weir elevation is per the approved plan. 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the 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. All required design depths are provided. 13. All required parts of the system are provided. .14. The required system dimensions are provided per the approved plans. DWQ USE ONLY ' Date Received Fee Paid IPermit Number JAN 2 5 2003 1 &5m-� DWQ-WARO State of North Carolina SWf}Cr, I/ag/0$ Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM j / This form may be photocopied for use as an original D p I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Chris Fulcher, Owner 3. Mailing Address for person listed in item 2 above: Ci Phone: (252 ) 249-0123 State:NC Zip:28570 Fax: ( ) 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): 5. Location of Project (street address): County:Pamlico 6. Directions to project (from nearest major intersection): NC Hlghway 55 to NCSR 1321, turn right on NCSR 1320. Project is at end of road. 7. Latitude:N 35-05'-05" Longitude:W 76-38'-04" of project 8. Contact person who can answer questions about the project: Name:Chris Fulcher Telephone Number: (252 ) 249-0123 Email: II. PERMIT INFORMATION: 1. Specify whether project is (check one): M. ❑Renewal ❑Modification Form SWU-101 Version 8.07 Page I 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 numberN /A and its issue date (if known) 3. Specify the type of project (check one): ❑Low Density ZHigh Density ❑Redevelop []General Permit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks): ®LAMA Major ®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. 2. Stormwater runoff from this project drains to the Neuse River basin. 3. Total Site Area: 5.67 acres 4. Total Wetlands Area: 0.18 acres 5. 100' Wide Strip of Wetland Area: acres (not applicable if no wetlands exist on site) 6. Total Project Area**:5.67 acres 7. Project Built Upon Area:19.992% Total Project % 8. How many drainage areas does the project have? 2 /, 09 s 67 L % Co iKgQ� 9. 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. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Gideon Creek Gideon Creek Stream Class & Index No. SA, HQW, NSW SA, HQW, NSW Drainage Area (sf) 143,544 SF, 3.30 AC 103,441 SF, 2.37 AC y Existing Impervious* Area (sf) 0 0 ;. Proposed Impervious*Area (sf) 1 17,890 SF, 0.41 AC 31,371 SF, Of(a6`AC % Impervious* Area (total) 12.46`Yo 30.3% Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (sf) 5,338 SF 1,728 SF On -site Streets (so 0 0 On -site Parking (sf) 11,453 SF 29,643 SF On -site Sidewalks (sf) 1,099 SF 0 Other on -site (sf) Off -site (so Total (so: 17,890 SF, 0.41 AC 31,371 SF, 0.68 AC 7_0 s, V 4c Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. **Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. Form SWU-101 Version 8.07 Page 2 of 4 10. How was the off -site impervious area listed above IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following 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. Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required in the above form, 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 SW401-Low Density Low Density Supplement Form SW401-Curb Outlet System Curb Outlet System Supplement Form SW401-Off-Site System Off -Site System Supplement Form SW401-Wet Detention Basin Wet Detention Basin Supplement Form SW401-Infiltration Basin Infiltration Basin Supplement Form SW401-Infiltration Trench Underground Infiltration Trench Supplement Form SW401-Bioretention Cell Bioretention Cell Supplement Form SW401-Level Spreader Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Form SW401-Wetland Constructed Wetland Supplement Form SW401-Grassed Swale Grassed Swale Supplement Form SW401-Sand Filter Sand Filter Supplement Form SWU- 101 Version 8.07 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 Office. (Appropriate office may be found by locating project on the interactive online map at httl2://h2o.enr.state.ne.us/su/msi maps.htm) 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initjtyjs • Original and one copy of the stormwater Management Permit Application Form (� • Original and one copy of the Deed Restrictions & Protective Covenants Form • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP • Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management • Copy of any applicable soil report • Three copies of plans and specifications (sealed, signed & dated), 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:NC Zip:28561 Phone: (252 ) 633-0068 EmaiLavoliseng0l2monIne.net VIII. APPLICANT'S CERTIFICATION Fax: (252 ) 633-6507 1, (print or type name of person listed in General Information, item 2) Chris Filcher certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A NCAC 21-1.1000. Signature: 6X" ga,_&4.n Date: Q/ Form SWU-101 Version 8.07 Page 4 of 4 AVOLIS ENGINEERING, P.A. Fi RsTC1'rl'mms .PO BOX--15564 1� BA\K 5405 MORTON RD NEW BERN. NC 26561 sa'mvi 252-633-0068 PAY TO THE ORDER OF NCDENR 11520 1 /2>_/2008 $ ••5Cs.00 Five Hundred Five and NCDENR MEMO:. ----- a 's a DOLLARS e ".t k ':iq; vt J PROPOSED GIDEON CREEK MARINA JAN 2 5 2008 4146 ORCHARD CREEK ROAD, NCSR 1317 PAMLICO COUNTY, NORTH CAROLINA DWQ- l/d ®O Project Description The proposed Gideon Creek Marina project encompasses the development of a 30 slip marina on a 5.67 acre parcel of land located off of Gideon Creek in the Pamlico Community in Pamlico County, North Carolina. The subject property is currently partially developed as a commercial use marina and fish house. The subject property is located at the intersection of Pamlico Road, NCSR 1320 and Orchard Creek Road, NCSR 1317. The subject property is bordered along its eastern side by Gideon Creek. A site location map and a 7.5 minute USGS Quadrangle Map of the project area is included on the project plans. Existing development on the eastern side of the subject property consists of wooden piers, wood shelters and remains of several other commercial use buildings, concrete slabs, a dilapidated residential dwelling and gravel and dirt parking and traffic circulation areas. The wood pier system is in a dilapidated condition and will accommodate approximately 12 - 18 boats depending on the length of the vessels. The western portion of the subject property was previously developed for residential uses. An existing block framed residential dwelling is located on this portion of the site. Additionally, a wood -framed shelter and commercial fishing gear is presently being stored on this area of the property. A total of 2.37 acres of the subject property are located on the western side of Orchard Creek Road as presented on the project plans. It is proposed that the existing commercial marina be demolished to accommodate a proposed new commercial marina and boat yard. Specifically, it is proposed that a dock system consisting of 30 slips be constructed on the site. Additionally, it is proposed that a 50-ton travel lift and haul out facility be constructed as a part of the marina development. A boat ramp will also be developed. The existing fish house structure will be converted for use as a marina office and clubhouse. It is proposed that all boat maintenance activities will occur on the western side of Orchard Creek Road on the 2.37 acre parcel of the subject property. It is proposed that no out -of - the water boat maintenance activities occur on the subject property on the eastern side of Orchard Creek Road. A small parking and traffic circulation area will be established on the subject property on the eastern side of Orchard Creek Road to provide access to the docking facilities. Otherwise, those areas currently located within the 75-foot CAMA AEC area and 50-foot Neuse Riparian Buffer areas presently covered with impermeable surfaces will be partially re- established with grass or other vegetation. The existing shoreline stabilization present along Gideon Creek consists of natural marsh shoreline areas, wood retaining walls and brick and concrete rubble. It is proposed for those areas where brick or concrete rubble presently exist, that a new vinyl sheet piling retaining wall be installed. Specifically, it is proposed that a total of 504 linear feet of vinyl retaining wall be installed to replace the existing dilapidated wood and concrete retaining wall/shoreline stabilization system. It is proposed that no dredging occur to accommodate the proposed construction. The proposed project is located on Gideon Creek which is classified as SA, I-IQW, and NWS Waters (Saline, High Quality Waters, and Nutrient Sensitive Waters) by the North Carolina Department of Environment and Natural Resources. Gideon Creek is presently closed to the taking of shellfish. The waters of Gideon Creek are designated as a Primary Nursery Area (PNA). It is proposed that the development as presented on the project plans be developed and constructed in one phase of construction. Public water service will be provided to the new dock and the existing structures to remain or to be renovated as part of this project. Pamlico County recently upgraded the water distribution system in the area of the project. Existing public water services exist on the site today and will be reused to the extent possible. No public sewer service is available in this area of Pamlico County. Two existing on -site septic systems exist on the subject property. Each of these systems is currently permitted and operational. It is proposed that a permit application be submitted and approved by the Pamlico County Health Department in order to facilitate and accommodate the redevelopment of the site. Several permits are required in order to properly execute this project. The following permits will be secured to properly execute the project: Erosion and Sedimentation Control Permit 2. Coastal Stormwater Permit NPDES General Permit for Marina Operations 4. Neuse Riparian Buffer Permit/Approval CAMA Major Permit for Marina Redevelopment 6. On -Site Septic System Permit NCDOT Driveway Permit 8. Building Permit The Gideon Creek project has been reviewed pursuant to the State of North Carolina Clearing House under the provision of the North Carolina Environmental Policy Act. A "Finding of No Significant Environmental Impact' was issued for the project on December 13, 2006 (SCH File# 07-E-4300-0164 (FONSI)). A copy of the FONSI statement is included with this narrative. Outlined below is a general description of the proposed development and permitting activities as it relates to some of the permits described above: Permit No. (to be Provided by DWQ) STORMWATER MANAGEMENT PERMIT APPLICATION FORM NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. Project Name Contact Person Phone Number Date Drainage Area Number Site Characteristics Drainage area Impervious area Percent impervious Design rainfall depth Peak Flow Calculations 103,441 flz 31.371 e 30.3 1.5 in Is pre/post control of the 1-yr 24-hr peak Flow required? N (Y or N) 1-yr, 24-hr runoff depth 0.25 in 1-yr, 24-hr intensity 3.7 in/hr Pre -development 1-yr, 24-hr runoff volume fe/sec Post -development 1-yr, 24-hr runoff volume 1 -99 ft3/sec Pre/Post 1-yr, 24-hr peak Flow control 5.99 ff'Isec Storage Volume: Non -SR Waters Minimum design volume required rya Design volume provided it, Storage Volume: SR Waters 1-yr, 24-hr rainfall depth 3.7 in Pre -development 1-yr, 24-hr runoff 12 997 fly Post -development 1-yr, 24-hr runoff 12:486 W Minimum volume required 5,330 ft3 r Volume provided p 5_, 33n e' Soils Report Summary Soil type Fine to Medium Sand Infiltration rate 2,0 in/hr SHWT elevation 1-0 fmsl Basin Design Parameters Drawdown time 0.25 days Basin side slopes 3 :1 Basin bottom elevation 3.0 fmsl Storage elevation 3-85 fmsl Top elevation 4 2- fmsl Basin Bottom Dimensions Basin length Irregular ft- Basinwidth Irregular It Bottom SA L,841 ftt 2p W^ATFgO OL R CEM-0 JAN 2 5 2008 DWQ-WARD Form SW401-Innaration Basin-Rev.1 Parts I. a II. Design Summary, Page 1 of 2 Permit (to be provided by DWQ) Additional Information Total runoff volume captured by basin 5,427 ac-in Length of vegetative f Iter for overflow 80 . ft Distance to structure 250 ft Distance from surface waters 50 ft Distance from water supplywell(s) >100 ft Separation from impervious soil layer 2 ft Naturally occuring soil above shwt 2 ft Bottom covered with 4-in of clean sand? Y (Y or N) Recorded drainage easement provided? N (Y or N) Capures all runoff at ultimate build -out? Y (Y or N) Bypass provided for larger storms? (Y or N) Pretreatment device provided one Form SW401-Infiftration Basin-Rev.1 Parts I. & IL Design Summary, Page 2 of 2 Permit (to be provided by DWQ) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. -- C2/0 Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. C4/C7 2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing: - Bypass structure, - Maintenance access, - Basin bottom dimensions, - Basin cross-section with benchmark for sediment cleanout, Flow distribution detail for inflow, Vegetated filter, and Pretreatment device. C4 3. Section view of the infiltration basin (1" = 20' or larger) showing: - Pretreatment and treatment areas, and Inlet and outlet structures. 4 — Calcs 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. X 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. X 6. An assurance that the installed system will meet design specifications upon initial operation once the project is complete and the entire drainage area is stabilized. C1 7. A construction sequence that shows how the infitlration basin will be protected from sediment until the entire drainage area is stabilized. -- 8. The supporting calculations. X 9. A copy of the signed and notarized inspection and maintenance (I&M) agreement. NNE 10. A copy of the deed restriction. Form SW401-Infiltration Basin-Rev.1 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1 McE9VEV JAN 2 5 2008 Permit Number: (io be provided by DWQ Drainage Area Number: Infiltration Basim9amnd Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — The drainage area will be carefully managed to reduce the sediment load to the infiltration basin. — Immediately after the infiltration basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — No portion of the infiltration basin will be fertilized after the initial fertilization that is required to establish the vegetation. — The vegetation in and around the basin will be maintained at a height of approximately six inches. After the infiltration basin is established, it will be inspected once a quarter and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of inspection and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to infiltration basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. The inlet device: pipe or The pipe is clogged (if Unclog the pipe. Dispose of the swale applicable). sediment off -site. The pipe is cracked or Replace the pipe, otherwise damaged (if applicable). Erosion is occurring in the Regrade the Swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Form SW401-Infiltration Basin I&M-Rev.2 Page I of 3 BMP element: Potentialproblem: How I will remediate theproblem: The forebay Sediment has accumulated Search for the source of the and reduced the depth to 75% sediment and remedy the problem if of the original design depth. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred or Provide additional erosion riprap is displaced. protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticides are used, wipe them on the plants rather than spraying. The main treatment area A visible layer of sediment Search for the source of the has accumulated. sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Replace any media that was removed in the process. Revegetate disturbed areas immediately. Water is standing more than Replace the top few inches of filter 5 days after a storm event. media and see if this corrects the standing water problem. If so, rvegetate immediately. If not, consult an appropriate professional for a more extensive repair. Weeds and noxious plants are Remove the plants by hand or by growing in the main wiping them with pesticide (do not treatment area. spray). The embankment Shrubs or trees have started Remove shrubs or trees to grow on the embankment. immediately. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. Form SW401-Infiltration Basin I&M-Rev.2 Page 2 of 3 Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the 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. Project name: Gideon Creek Marina BMP drainage area number: Print name: Chris Fulcher Address: P.O. Box 250, Oriental, NC 28570 Phone: 252-249-0123 Signature: Date: 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. 1, Beth Simmons , a Notary Public for the State of North Carolina , County of Craven do hereby certify that Chris Fulcher personally appeared before me this day of �O P�, 2-C7J6 ,and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, NOTARY Ir /'k�. C _ PUBLIC r Oil_ SEAL My commission expires April 22, 2009 Form SW40I-infiltration Basin I&M-Rev.2 Page 3 of 3 Y; 3A"E OVi _ ;3 '�r°ru!�tua AVOLIS ENGINEERING, P.A. Z� P.O. Box 15564 • New Bern, North Carolina 28561 • (252) 633-0068 January 22, 2008����® Mr. Al Hodge r!AN 4 5 2008 NCDENR - Water Quality Section ®�����® 943 Washington Square Mall Washington, NC 27889 RE: Gideon Creek Marina 4146 Orchard Creek Road, Pamlico County, North Carolina AE Project No. 03148 Dear Al: Enclosed please find the following for the above -referenced project for your review and approval: • Stormwater Permit and Narrative including Soils Report (Original and One Copy) • Project Plans (2 Copies) • Stormwater Calculations (2 Copies) • $505 Permit Fee It is requested that your review the attached permit submittal. Should you have any questions relating to this matter or need any additional information or assistance, please do not hesitate to call. P.E. A. CAMA Major Permit A CAMA Major permit is being sought in order to properly execute this project. CAMA Areas of Environmental Concern (AEC) exist on the property. The limits of the 75 foot AEC are delineated on the project plans. Limited development is proposed to occur within these CAMA AEC areas as a part of the proposed upland development. Portions of the 75 foot AEC will be disturbed in order to make the necessary site improvements. Specifically, the shoreline area will be disturbed in order to install the proposed 504 linear feet section of vinyl retaining wall. Additionally, some of the existing impermeable surfaces, including structures, concrete and brick rubble and wood retaining wall system, presently located in the 75 foot AEC area will be removed. Grass vegetation will be re- established in the majority of these areas. The existing wood pier and dock system present on the subject property will be removed. This dock system will be replaced with a wood - framed dock system as presented on the project plans. As delineated during the Environmental Assessment process, it is proposed that a total of 31,957 square feet of public trust waters be impacted by the proposed marina redevelopment. The extent of the public trust impacts are delineated on the project plans. The 75 foot CAMA AEC area existing on the subject property covers a total of 103,764 square feet, 2.38 acres. A total of 13,219 square feet, 0.30 acres of impermeable surface presently exists within the 75 foot AEC area. Of these impermeable surfaces, all but 6,295 square feet, 0.14 acres of impermeable surfaces will be removed and these areas re- established with grass vegetation. A portion of the impermeable surfaces in the 75 foot CAMA AEC area are associated with the haul out well and access pads for the haul out facility and boat ramp. B. Coastal Stormwater Permit The subject property is located adjacent to Gideon Creek. This creek, as previously stated has a surface water classification of SA, HQW, NSW. Stormwater runoff from the project will discharge to these surface waters. Since the receiving surface waters are classified SA, an infiltration type system is required to comply with the Coastal Stormwater Permitting Regulations. The subject property covers a total area of 5.67 acres. 3.30 acres of the property is located on the eastern side of Orchard Creek Road. The remaining 2.37 acres of the subject property is located on the western side of the subject property. One drainage basin exists for each of these areas. Drainage Basin No. 1 is located on the eastern side of Gideon Creek Road. This drainage basin covers a total area of 143,544 square feet, 3.30 acres. Presently, there is a total of 17,377 square feet of impermeable surfaces located within this drainage basin. After development is completed, a total of 17,890 square feet of impermeable surfaces (existing and new) will remain within this drainage basin. The percent built -upon development within this drainage basin will be 12.46% after development. It is proposed that this drainage basin be developed under the low density criteria of the Stormwater Regulations. Specifically, it is proposed that the surface water runoff from the impermeable areas be directed to discharge to points upgradient of the Neuse Riparian Buffer areas. Additionally, it is proposed that provisions be provided to allow for diffuse flow of any runoff from impermeable surfaces through the Neuse Riparian Buffer areas. Drainage Basin No.2 covers a total area of 103,441 square feet, 2.37 acres. This drainage basin is located on the western side of Orchard Creek Road. A total of 9,715 square feet of impermeable areas exist in this drainage basin including two structures and gravel surfacing. All but 1,728 square feet of these existing surfaces will be removed. It is proposed that the boat yard area be constructed on this area of the site as presented on the enclosed project plans. It is proposed that a total of 29,643 square feet, 0.68 acres of new impermeable surfaces be created within this drainage basin. Considering the existing 1,728 square feet of impermeable to remain, the overall impermeable coverage in this drainage basin is 31,371 square feet, or 30.3% built -upon. Since the receiving water course in this area is classifiable as SA waters, an infiltration type stormwater treatment system is proposed. Specifically, it is proposed that an infiltration basin be constructed to the first 1 %2- inch of the design storm. This runoff will be routed directly to the infiltration basin. Excess runoff will bypass the infiltration basin through a weir/drop inlet configuration and will be routed through a vegetated swale and vegetated buffer area to ensure diffuse and treated flow prior to entering the Neuse Riparian Buffer area. The infiltration basin will be constructed to retain a maximum depth of runoff of one foot. A soils investigation was completed on the subject property as part of the initial design efforts. Hand augers were advanced in the approximate center of the infiltration basin in order to observe soils and groundwater conditions. The soil profile encountered at this auger location can be described as follows: t ' ? f i6DESCRIPTIONf DEPTH k'v - d , 0 - 12 Inches Black Silty Sand 12 Inches - 24 Inches Light Tan to Gray Fine Sand 24 Inches - 28 Inches Light Tan Sand with Traces of Clay/Orange 28 Inches - 42 Inches Light Tan to Orange Sandy Clay Becoming Sandier with Depth 42 Inches - 54 Inches Light Brown Fine Sand Groundwater was encountered at this auger location at a depth of approximately 36 inches below the surface. Mottling, indicated that soil wetland conditions were encountered at depths of approximately 24 inches below the existing grade. Considering the elevations present, the groundwater was encountered at an elevation of approximately 0.5 feet and soil and wetland conditions were encountered at an elevation of 1.0 feet. It is proposed that two feet minimum vertical separation be provided between the soil and wetness conditions and the bottom of the infiltration basin. The bottom of the infiltration basin was therefore set at elevation 3.0 feet. Additionally, the confining clay layer encountered at a depth of 24 to 42 inches within the footprint of the infiltration basin will be removed and will be filled with a select sand fill material to encourage infiltration. Based upon a review of soil conditions, the placement of select fill and removal of the confining clay layer, a infiltration rate of 6.0 inches per hour was selected for the site. C. Erosion and Sedimentation Control Permit An Erosion and Sedimentation Control Permit application will be needed to properly execute the project since in excess of one acre of land will be disturbed. It is proposed that a total of approximately 3.5 acres of the 5.67 acre parcel be disturbed. It is proposed that no wetland areas be impacted by the proposed development. Zone 1 and Zone 2 buffer areas will be impacted in order to install the bulkhead facilities, docks, haulout and boat ramp and to remove existing impermeable surfaces within the buffer areas. Other buffer areas will be graded and vegetation will be re-establish as indicated on the site plan. It is proposed that various Erosion and Sedimentation Control practices be employed on the subject property in order to protect the surface waters, wetland areas and adjacent property owners. D. On -Site Wastewater Permit There are presently two existing on -site septic systems located on the subject property. It is proposed that each of these systems remain and be re -utilized to treat sewage generated from the project. Since the property will be redevelop, it will be necessary to re -obtain operation permits from the Pamlico County Health Department. E. NCDOT Driveway Permit An NCDOT Driveway permit will be secured for the project to make drive connections to the public roads. STORMWATER SYSTEM MAINTENANCE PLAN GIDEON CREEK MARINA 4146 ORCHARD CREEK ROAD, PAMLICO COUNTY, NORTH CAROLINA The stormwater system is defined as the (1) infiltration basin, collection system, outlet structure and swales. Maintenance activities shall be performed as follows: After every significant runoff producing rainfall event and at least monthly: A. inspect the entire stormwater system for sediment accumulation, erosion, trash accumulation, vegetated cover and general condition. B. Check and clear all drainage devices of any obstructions such that overflow will discharge. Repair eroded areas immediately, re -seed as necessary to maintain full vegetative cover, mow vegetative cover to maintain a maximum height of six -inches and remove trash as needed. Inspect and repair the collection system (piping, swales, rip rap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the infiltration basins semi-annually or when sediment accumulates to reduce the design depth by 25% for each basin. Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality. 5. If the basins 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. 6. All components of the stormwater system shall be maintained in good working order. I acknowledge and agree by my signature that I am responsible for the performance and maintenance of the Stormwater Collection and Treatment System approved and permitted for Gideon Creek Marina, 4146 Orchard Creek Road, Pamlico County, North Carolina. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party.