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HomeMy WebLinkAboutSW6130501_CURRENT PERMIT_20130610STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATEf,?�(� (p�� YYYYM M DD , z A113,P)h I - MCDENR North Carolina Department of Environment and Division of Water Quality Pat McCrory Thomas A. Reeder Governor Acting Director June 10, 2013 David Heins, Environmental Division Chief Director of Public Works 2175 Reilly Road Stop A Fort Bragg, North Carolina 28310-5000 JUN 112 2M Natural Resources MID John E. Skvarla, III Secretary Subject: Fort Bragg Conferencing and Catering Center Dear Mr. Heins: The Stormwater Permitting Unit received a complete Stormwater Management Permit Application for the subject project on May 24, 2013. 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 and Session Law 2006-246. We are forwarding Permit No. S W6130501, dated June 10, 2013, for the construction, operation and maintenance of the subject project and the stormwater BMPs. This permit shall be effective from the date of issuance until June 9, 2021 and shall be subject to the conditions and limitations as specified therein, and does not supersede any other agency permit that may be required. Please pay special attention to the conditions listed in this permit regarding the Operation and Maintenance of the BMP(s), recordation of deed restrictions, procedures for changes of ownership, transferring the permit, and renewing the permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system, to record deed restrictions, to follow the procedures for transfer of the permit, or to renew the permit, 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 by filing a written petition with the Office of Administrative Hearings (OAH). The written petition must conform to Chapter 150B of the North Carolina General Statutes. Per NCGS 143-215(e) the petition must be filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be final and binding. This project will be kept on file at the Fayetteville Regional Office. If you have any questions, or need additional information concerning this matter, please contact Mike Randall at (919) 807-6374; or mike.randall@ncdenr.gov. Sincerely, for Thomas A. Reeder, Acting Director cc: SW6130501 File cc: Mr. Ward Lee, DPW/Water Management Branch F. Virginia Norton, P.E. Dewberry Fayetteville Regional Office Wetlands and Sto rnwaler Branch 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807 63001 FAX 919 807-6494 Internet. www.ncwaarquality.org An Equal Opportunity r 41firmative Action Employer NorthCarolina Naturally' State Stormwater Permit Permit No. SW6130501 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT 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 Fort Bragg Conferencing and Catering Center Cumberland County FOR THE construction, operation and maintenance of two bioretention basins, two dry extended detention basins, and one level spreader and vegetative filter strip in compliance with the provisions of Session Law 2006-246 and 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until June 9, 2021, 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. 2. The two bioretention basins, two dry extended detention basins, and one level spreader and vegetative filter strip are approved for the management of stormwater runoff as described in the application documents and as shown on the approved plans. 3. 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. 4. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. The built -upon areas associated with this project shall be located at least 30 feet landward of all perennial and intermittent surface waters. II. SCHEDULE OF COMPLIANCE During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. Page 1 of 4 State Stormwater Permit Permit No. SW6130501 2. The permittee shall at all time provide the operation and maintenance necessary to assure the permitted bioretention basins, dry extended detention basins, and . level spreader and vegetative filter strip 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 re -vegetation of slopes and the filter strip. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans. f. Debris removal and unclogging of all drainage structures, level spreader, filter media, planting media, underdrains, catch basins and piping. q. Access to the cell and outlet structure must be available at all times. 3. Records of maintenance activities must be kept for each permitted BMP. The reports will indicate the date, activity, name of person performing the work and what actions were taken. 4. The permittee shall submit to the Division of Water Quality an annual summary report of the maintenance and inspection records for each bioretentioni basins, dry extended detention basin, and level spreader and vegetative filter strip. The report shall summarize the inspection dates, results of the inspections, and the maintenance work performed at each inspection. 5. The bioretention basins, dry extended detention basin, and level spreader and vegetative filter strip shall be constructed in accordance with the approved plans and specifications, the conditions of this permit, and with other supporting data. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the bioretention basins, dry extended detention basin, and level spreader and vegetative filter strip 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. 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. 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 was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. Page 2 of 4 State Stormwater Permit Permit No. SW6130501 9. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of eight years from the date of the completion of construction. 10. 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 completed Name/Ownership Change form signed by both parties, to the Division of Water Quality, accompanied by the supporting documentation. 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 a request to transfer the permit. 3. 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. 4. 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. 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. 6. 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. The permit issued shall continue in force and effect until revoked or terminated. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and re -issuance or termination does not stay any permit condition. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 9. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 10. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws, rules and regulations contained in Session Law 2006- 246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al. 11. The permittee shall notify the Division in writing of any name, ownership or mailing address changes at least 30 days prior to making such changes. Page 3 of 4 State Stormwater Permit Permit No. SW6130501 12. The permittee. shall submit a renewal request with all required forms and documentation at least 180 days prior to the expiration date of this permit. Permit issued this the 10th day of June, 2013. ORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Division of Water Quality By Authority of the Environmental Management Commission Page 4 of 4 State Stormwater Permit Permit No. SW6130501 Fort Bragg Conferencing and Catering Center Cumberland Countv 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 Name) 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. , Noted deviations from approved plans and specification: Signature Registration Number Date SEAL cc: NCDENR-DWQ Regional Office Page 1 of 1 9i. -j—LLAl al 41) ;11 6/ D.WQ USE ONLY Date Received Fee Paid Permit Number Applicable Rules: ❑ Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph II -Post Construction (select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ M mt Plan: State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM 771is form way be photocopied for use as en original I. GENERAL INFORMATION 1. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Port Bragg - Conferencing and Catering Center 2. Location of Project (street address): . City: Fayetteville County:Cuinberland Zip:28307 3. Directions to project (from nearest major intersection): From the intersection of NC-210 S and NC-87 S, travel South on NC-87 S for 4.6 miles. Turn Right on Santa Fe Drive and continue for 0.6 miles, Turn Right onto the ramp to Port Bragg/Pope AFB, merge onto All American Expy N and continue for 1.8 miles. Take the exit toward Gruber Rd, turn Right onto Gruber Rd and continue for 0.9 miles. Turn Right onto Reilly Rd, continue for 0.7 miles and the Project Site will be on 4. Latitude:35° 07' 57" N Longitude:78° 59' 34" W of the main entrance to the project. It. PERMIT INFORMATION 1. a.Specify whether project is (check one): ®New ❑Modification ❑ Renewal w/ Modificationt tRenemals With wodifientions also requires SWU-102 - Renemal Application Form b.If this application is being submitted as the result of a modification to an existing permit, list the existing permit number , its issue date (if known) and the status of construction: ❑Not Started ❑Partially Completed* ❑ Completed* 'provide a designer's certification 2. Specify the type of project (check one): ❑Low Density ®High Density ❑Drains to an Offsite Stormwater System ❑Other 3. If this application is being submitted as the result of a previously returned application or a letter from DWQ requesting a state Stormwater management permit application, list the stormwater project number, if assigned, and the previous name of the project, if different than currently proposed, 4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ®Sedimentation/Erosion Control: 10.49 ac of Disturbed Area ❑NPDES Industrial Stormwater ❑404/401 Permit: Proposed Impacts b.lf any of these permits have already been acquired please provide the Project Name, Project/Permit Number, issue date and the type of each permit: Form SWU-I01 Version 06Aug2012 Page 1 of 5. Is the project located within 5 miles of a public airport? ®No ❑Yes Ifyes, see S.L. 2012-200, Part VI: http://portal.ncdenr.org/web/wq/ws/su/statesw/rules laws III. CONTACT INFORMATION 1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee, designated government official, individual, etc. who owns the project): Applicant/Organization:Directorate of Public Works (DPW) Signing Official & Title:Mr. David Heins, Environmental Division Chief (DPW) b.Contact information for person listed in item la above: StreetAddress:2175 Reilly Road Stop A City:Fort Bragg State:NC Zip:28310-5000 Mailing Address (if ahplicnhle):2175 Reilly Road Stop A City:Fort Bragg State:NC Zip:28310-5000 Phone: (910 ) 396-8207 Fax: (910 ) 907-2420 EniaiLdavid.a.heins.civ@mail.mil c. Please check the appropriate box. The applicant listed above is: ® The property owner (Skip to Contact Information, item 3a) ❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below) ❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and 2b below) ❑ Developer* (Complete Contact Information, item 2a and 2b below.) 2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (]'his is the person who owns the property that the project is located on): Property Owner/i Signing Official & b.Contact information for person listed in item 2a above: Street Address: City: Mailing Address (if City: Phone: ( 1 Email: State: State: Fax: ( ) 3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other person who can answer questions about the project: Other Contact Person/ Organization: Mr. Lee Ward Signing Official & Title:DPW/ Water Management Branch b.Contact information for person listed in item 3a above: Mailing Address:131dg 0-9125, McKellars Road City:Fort Bragg State:NC Zip:28310-5000 Phone: (910 ) 908-5286 Email:lee.p.ward.civ@mail.mil 4. Local jurisdiction for building permits: Fax: (910 ) 907-2420 Point of Contact: Phone #: Form SWU-101 Version 06Aug2012 Page 2 of 6 IV. PROJECT INFORMATION 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. The conference and catering center will be built on a previously developed site at port Bragg NC. Runoff from the new development will be treated with bioretention areas and dual dry detention basins in combination with a level spreader filter strip. 2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved: ❑ Approval of a Site Specific Development Plan or PUD Approval Date: ❑ Valid Building Permit Issued Date: ❑ Other: Date: b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with: ❑ Coastal SW -1995 ❑ Ph 11 - Post Construction 3. Stormwater runoff from this project drains to the Cape Fear River basin. 4. Total Property Area: 10.41 acres 5. Total Coastal Wetlands Area: 0 acres 6. Total Surface Water Area: 0 acres 7. Total Property Area (4) - Total Coastal Wetlands Area (5) -Total Surface Water Area (6) = Total Project Area+:10.14 acres * To"" project area shall be calculated to exclude thefollowing: the nornml pool of iinpotmdcd structures, the area behveen the banks of streams and rivers, the area below the Vornml Higgh Water (NHW) line or Mean High Water (Milm line, and coastal wetlands laurhoard from the NHW (or MIIM line. The resultant rrajret area is used to calculate overall percent built upon area (13UA). Non -coastal wetlands lmrdivarl of the NI-1((ar MHW) line mny he included in the total project area. 8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 60 % 9. How many drainage areas does the project have?2 (ror high density, count 1 for each proposed engineered siorunvater BMP. For lour density and other projects, use 1 far till! Whole property area) 10. Complete the following information for each drainage area identified in Project Information item 9. If there are more than four 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 Drainage Area _ .Drainage Area _ Receiving Stream Name Beaver Creek Beaver Creek Stream Class * C C Stream Index Number * I8-31-24-5 18-31-24-5 Total drainage Area (so 77,101 177,289 On -site Drainage Area (sf) 77,101 177,289 Off -site Drainage Area (so 0 0 Proposed Impervious Area** s 48,352 118,919 % Impervious Area** total 63% 67% Impervious' Surface Area Drainage Area 1 Drainage Area 2 Drainage Area Drainage Area _ On -site Buildings/Lots (so 0 52,945 On -site Streets (so 0 0 On -site Parking (so 41,694 53,568 On -site Sidewalks (st) 6,658 12,406 Other on -site (so 0 0 Future (so 0 0 Off -site (st) 0 0 Existing BUA*** (so 0 0 Total (so: 48,352 118,919 * Stream Class and Index Number can be detennined at: lrttp://pnrtnLnedenr.or nehhoq/ps/can/clnssi rrnfimrs Imppervious 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 06Aug2012 Page 3 of 7 ***Report only that maount of existing BUA that 7uill renain afterdenelop lent. Do not report any existing BUA that is to be remoaed and Which will be replaced by Bern BUA. 11. I -low was the off -site impervious area listed above determined? Provide documentation. N/A - only onsite drainage is draining to the BMPS Projects in Union County: Contact DWQ Central Office staJJ'to check if the project is located within a Threatened & Endangered Species watershed that map be subject to more stringent sto n water requirements as per 15A NCAC 028 .0600. V. SUPPLEMENT AND O&M FORMS The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded from http://12ortal.ncdenr.org/web/wq/ws/su/bmp-manual. 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. A detailed application instruction sheet and BMP checklists are available from lift'://Liortil.ncdenr.org/web/wg/ws/su/statesw/forms does. The complete application package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating project on the interactive online map at http://yortal.ncLienr.org/web/wq/ws/su/maw.) Please indicate that the following -required information have been provided by initialing in the space provided for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions for each submitted application package from http:[/Liortal.ncdenr.orh/web/wq/ws/su/statesw/forms does. Initials 1. Original and one copy of the Stormwater Management Permit Application Form. 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants Form. (if required as per Part Vll below) 3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M agreement(s) for each BMP. 4. Permit application processing fee of $505 payable. to NCDENR. (For an Express review, refer to http://www.envhelp.org/12ages/onestol2exi2ress.html for information on the Express program and the associated fees. Contact the appropriate regional office Express Permit Coordinator for additional information and to schedule the required application meeting.) 5. A detailed narrative (one to two pages) describing the stormwater treahnent/management for _ 6. A USGS map identifying. the site location. If the receiving stream is reported as class SA or the _ receiving stream drains to class SA waters within'h mile of the site boundary, include the 1/2 mile radius on the map. 7. Sealed, signed and dated calculations (one copy). 8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including: a. Development/Project name. b. Engineer and firm. c. Location map with named streets and NCSR numbers. d. Legend. e. North arrow. f. Scale. g. Revision number and dates. h. Identify all surface waters on the plans by delineating the normal pool elevation of impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal waters, and any coastal wetlands landward of the MHW or NHW lines. • Delineate the vegetated buffer landward from the normal pool elevation of impounded structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters. i. Dimensioned property/project boundary with bearings & distances. j. Site Layout with all BUA identified and dimensioned. k. Existing contours, proposed contours, spot elevations, finished Floor elevations. 1. Details of roads, drainage features, collection systems, and stormwater control measures. Form SWU-101 Version 06Aug2012 Page of m. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a qualified person. Provide documentation of qualifications and identify the person who made the determination on the plans. n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations. o. Drainage areas delineated (included in the main set of plans, not as a separate document). p. Vegetated buffers (where required). 9. Copy of any applicable soils report with the associated SHWT elevations (Please identify elevations in addition to depths) as well as a map of the boring locations with the existing elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the project area clearly delineated. For projects with infiltration BMPs, the report should also include the soil type, expected infiltration rate, and the method of determining the infiltration rate. (Infiltration Devices submitted to WiRO: Schedule a site visit for D WQ to verifil the SHWF prior to submittal, (910) 796-7378.) 10. A copy of the most current property deed. Deed book: N/A Page No: 11. For corporations and limited liability corporations (LLC): Provide documentation from the NC Secretary of State or other official documentation, which supports the titles and positions held by the persons listed in Contact Information, item la, 2a, and/or 3a per 15A NCAC 2H.1003(e). The corporation or LI_C must be listed as an active corporation in good standing with the NC Secretary of State, otherwise the application will be returned. http: / /www.secretary.state.iic.us/Corporations/CSearcli.asLx VIL DEED RESTRICTIONS AND PROTECTIVE COVENANTS For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and protective covenants forms can be downloaded from littp://portal.ncdenr.org/web/wn/ws/su/statesw/fo-nms does. Download the latest versions for each submittal. In the instances where the applicant is different than the property owner, it is the responsibility of the property owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring that the deed restrictions are recorded. By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and protective covenants for this project, if required, shall include all the items required in the permit and listed on the forms available on the website, 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 NC DWQ and that they will be recorded prior to the sale of any lot. VIII. CONSULTANT INFORMATION AND AUTHORIZATION Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as addressing requests for additional information). Consulting Engineer:F. Virginia Norton, PE Consulting Firm: Dewberry Mailing Address:2301 Rexwoods Drive, Suite 200 Phone: (919 ) 424.3740 Email: fvnorton@d ewberry.com State:NC Zip:27606 Fax: (919 ) 881.9923 Form SWU-101 Version 06Aug2012 Page 5 of 7 IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, conpalcte this section) 1, (print or type nnme of person listed in Contact Information, item 2a) certify that 1 own the property identified in this permit application, and thus give permission to (print or type name of person listed in Contract Information, item 1a) with (print or type name of organization listed in Contact Information, item 1 a) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal, which indicates the party responsible for the operation and maintenance of the stormwater system. As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DWQ immediately and submit a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to $25,000 per day, pursuant to NCCS 143-215.6. a Notary Public for the State of , County of do hereby certify that before me this _ day of personally appeared and acknowledge the due execution of the application for I stormwater permit. Witness my hand and official seal, SEAL My commission Form SWU-101 Version 06Aug2012 Page 6 of 7 X. APPLICANT'S CERTIFICATION I, (print or hype mmne of person lister! in Contact Information, item In) David A. Heins 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 the applicable stormwater rul s u der 15A� NCA�C 21-I .1000 and any other applicable state stormwr,�CL a/ter requirements. Signature: llate: c/ h 13 a Notary public for the State of do hereby certify that before me this _ day of County of personally appeared and acknowledge the due execution of the application for a stormwater permit. Witness my hand and official seal, SEAL. My commission exp Fonn SWU-101 Version 06Aug2012 Page 7 of 7 Level Spreader and Vegetated Filter Strip Project: Fort Bragg — Conferencing and Catering Center Latitude: 35.7525 Long:79.4929 Permitting Authority: State Regulatory Credits 40% Total Suspended Solids 30%Total Nitrogen 3S%Total Phosphorus Design No High Flow Bypass No Forebay No Underdrain Purposes of a Level Spreader and Vegetated Filter Strip NA Diffuse Flow per Buffer Rule. Slopes may not exceed 5% or If the flow from the 1 inch/hour storm exceeds 2 cfs. < 8% SW Rule Provisions: required to handle the overflow of infiltration systems and the discharge from wet detention ponds. The slopes may NOT exceed 5% for wooded vegetation or 8% for herbaceous vegetation. Yes Pollutant Removal: Not to be used as a stand-alone BMP. Can be a useful component of a stormwater treatment train. In order to achieve pollutant removal, an engineered filter strip must be used. BMPs in Series The overall efficiency (E) for a given pollutant (TSS, TN or TP) of multiple BMPs in series is computed as follows: Where: E = Total pollutant removal efficiency (%) = A+ B—[(A*B)/100] A = Efficiency of the First or Upstream BMP B = Efficiency of the Second or Downstream BMP For more than two BMPs in series, the equation can be applied iteratively from upstream to downstream using the calculated total efficiency as the upstream efficiency in each successive iteration. E= (50 + 50) — [(50 * 50)/100] = 75 E= (75 + 40) — [(75*40)/100) = 85 Requirements Yes Sizing shall take into account all runoff at ultimate build -out, including off -site drainage. Yes BMP located in a recorded drainage easement with a recorded access easement to a public ROW Ye Distribution device used to provide even distribution of runoff across the BMP. < 8% Vegetated Filter Strip shall have a longitudinal slope of five percent or less where practicable. Slopes may NOT exceed five percent for wooded vegetation or eight percent for herbaceous vegetation. Yes Level Spreader constructed with a uniform slope of zero percent (or level). Yes Level Spreader constructed of concrete (or other permanently stable material), with a blind swale immediately upslope for stormwater distribution and aggregate stone not exceeding one inch in diameter immediately downslope for stormwater dissipation. Yes The LS must be straight or convex. Yes A flow bypass system shall be provided when the flow rates from a drainage area or a BMP exceed the capacity of the Level Spreader and Vegetated Filter Strip. NA When receiving flow directly from the drainage area, a forebay shall be provided. The forebay shall be designed so that its surface area is 0.2%of the contributing area's impervious surface. The recommended depth is three feet at the inlet of the forebay and sloping upward to one foot at the outlet. The forebay can be omitted if the swale is lined with rip rap. Yes When receiving flow from a BMP, an energy dissipation device shall be provided before the flow is directed to the Level Spreader. NA If the blind Swale is lined with grass, then the stormwater shall be discharged parallel to the swale. If the blind swale is lined with rip rap, then there are no requirements for the entrance angle. Yes For engineered filter strips, the filter strip and any adjacent cut slopes must be covered with at least 6 inches of loose topsoil with appropriate soil amendments and an appropriate turf grass species. The engineered filter strip must be constructed with a uniform transverse slope. Yes In the Vegetated Filter Strip, the topsoil must be amended with lime and organic matter and an appropriate species of grass must be selected for the applicable climatic zone. Length and Width of the Level Spreader and Vegetated Filter Strip Yes — 30 ft The minimum length of Level Spreader shall be 10 feet and the maximum length shall be 100 feet. Yes— 30 ft The minimum width of the Vegetated Filter Strip shall be 30 feet except used to meet stormwater rule requirements in SA waters,'in which case the minimum width shall be of 50 feet in width. 0.54 Peak discharge in cfs Yes — 30 ft Length of level spreader (10 ft/cfs or 10 x 0.54 cfs = required length = 5.4 feet (see below)] Purpose Receiving Type of VFS Design flow (Bypass larger flows) Sizing Criteria flow from Drainage Protected riparian 1 in/hr storm 50 ft/cfs Diffuse Flow area buffer (bypass larger flows) per Buffer Rule Protected riparian 10-yr storm discharge up to 2 cfs 50 ft/cfs BMP buffer (bypass flows exceeding 2 cfs) Wooded setback/ 10-yr storm discharge up to 2 cfs o 85/o TSS buffer/ filter strip (bypass flows exceeding 2 cfs) 50 ft/cfs SW Rule removal wet Herbaceous setback/ 10- r storm discharge u to 5 cfs y g p Provisions in. pond SL 2008-211 or a buffer/ filter strip (bypass flows exceeding 5 cfs) 20 ft/cfs (Coastal Cos.) standard 10-yr storm discharge up to 10 cfs & 2H .1008 infiltration system Engineered filter strip 10 ft/cfs (bypass flows exceeding 10 cfs) Drainage Engineered filter strip 1 in/hr storm 10 ft/cfs area (bypass larger flows) Pollutant Removal 10-yr storm discharge up to 10 cfs 10 ft/cfs BMP Engineered filter strip (bypass flows exceeding 10 cfs) Dry Extended Detention Basin Calculations Project: Fort Bragg — Conferencing and Catering Center Latitude: 35.7525 Long: 79.4929 Permitting Authority: State Regulatory Credits 50% TSS 10%Total Nitrogen 10%Total Phosphorus BMPs in Series If multiple BMPs are placed in series, they can utilize the combined volume control capabilities and increase combined removal efficiency. The volume control capabilities are additive, however, the pollutant removal rates are not. The overall efficiency (E) for a given pollutant (TSS, TN or TP) of multiple BMPs in series is computed as follows: Where: E = Total pollutant removal efficiency (%) = A + B—[(A*B)/100) A = Efficiency of the First or Upstream BMP B = Efficiency of the Second or Downstream BMP For more than two BMPs in series, the equation can be applied iteratively from upstream to downstream using the calculated total efficiency as the upstream efficiency in each successive iteration. E_ (50 + 50) — [(50 * 50)/100) = 75 E_ (75 + 40) — [(75*40)/100) = 85 General Requirements Yes Sizing shall take into account all runoff at ultimate build out, including off -site drainage Yes Vegetated slopes shall be no steeper than 3:1. Yes BMP shall be located in a recorded drainage easement with access to a public ROW. Yes For pollutant removal credit, the applicable design storm must be held for a period of no less than 2 but no more than 5 days. Yes The energy of the influent flow must be controlled. Yes The maximum depth shall be 10 feet. Yes Freeboard shall be a minimum of 1 foot above the maximum stage of the basin. Yes A minimum length to width ratio of 1.5:1 is required (90x60) Yes Basin design must include a drain. NA A forebay is required if the design flow to the facility is over 10 acre -inches. SHWT SH WT: 221.0 Bottom of Basin Elevation: 223.5 Seasonally high groundwater table must be at least 2 feet below the bottom of the basin Water Quality Treatment Volume Volume = 3630 * Rd * Rv * Ac Where Ac=[sf of Drainage Area]/43,560 sf/ac Rd = Design Storm I = Impervious Portion / Drainage Area Rv = 0.05 + 0.9 * I Ac= 177,289/43,560 = 4.069 Acres 1= 118,919 / 177,289 = 0.67 Rd = 1.0 Inches Rv= 0.05 + 0.9 (0.67) = 0.653 Volume = 3630 * 1.0 * 0.653 *4.069 Acres = 9,645 cf Volume Provided: 9,800 cf Storage Volume for Sediment Deposition: 2,400 cf BMP shall have an additional 25% storage volume for sediment deposition Bio-retention Cells and Rain Gardens Project: Fort Bragg — Conferencing and Catering Center Latitude: 35.7525 Long:79.4929 Permitting Authority: State Regulatory Credits Yes Pollutant Removal without Internal Water Storage (IWS) 85%Total Suspended Solids 35%Total Nitrogen 45%Total Phosphorus NA Pollutant Removal —with Internal Water Storage (IWS) (Coastal Plain & Sand Hills) 85% Total Suspended Solids 60%Total Nitrogen 60%Total Phosphorus NA Pollutant Removal —with Internal Water Storage (IWS) (Piedmont & Mountains Counties) 85%Total Suspended Solids 40%Total Nitrogen 45% Total Phosphorus Requirements Yes Side slopes stabilized with vegetation shall be no steeper than 3:1. Yes Either a bypass or an internal overflow is required for bypassing storm flows in excess'of the design flow for bioretention cells. NA A vegetated filter strip is not required for overflows, bypass flows, or discharges from a bioretention cell (except for within %: mile of and draining to SA waters or unnamed tributaries of to SA waters). NA The design shall be located a minimum of 30 feet from surface waters, and 50 feet from Class SA waters. NA The design shall be located a minimum of 100 feet from water supply wells. NA Bioretention facilities shall not be used where slopes greater than 20% Yes Inflow must be sheet flow (1 ft/sec for mulch cells, 3 ft/sec for grass cells) or utilize energy dissipating devices. 61C1:9� SH WT: 225.0 Bottom of BMP: 227.0 Yes Bioretention shall not be used where the seasonally high water table is less than 2 feet below bottom of the BMP. Water Quality Treatment Volume Volume = 3630 * Rd * Rv * Ac Where Ac=[sf of Drainage Area]/43,560 sf/ac Rd = Design Storm I = Impervious Portion / Drainage Area Rv=0.05+0.9 * I Ac= 77,101/43,560 = 1.77 1= 48,352 / 77, 101 = 0.627 Rd = 1.0 Inches Rv= 0.05 + 0.9 (48,352 / 77, 101) = 0.6143 Volume Required = 3630 * 1.0 * 0.6143 * 1.77 Acres = 3,950 cf Volume Provided: 7,672 cf 10/10/10 Rule (Dimensions, Ponding Depth and Surface Area) 120 x 40 No dimension is less than 10 feet (width, length, or radius) 12 Ponding depth 12 inches or less (9 inches or less is preferred) 4,835 Surface area = 10% of the BUA (48,352 * 0.10) Cells at or below 5,000 square feet tend to function more effectively than large Bio-retention cells, therefore; the surface area of bioretention BMPs should be at or below 5,000 square feet. 2nd bio-retention cell 150 x 40 No dimension is less than 10 feet (width, length, or radius) 12 Ponding depth shall be 12 inches or less (9 inches or less is preferred) 6,000 +/- Surface area = 10% of the BUA OR Surface area = treatment volume/ponding depth Cells at or below 5,000 square feet tend to function more effectively than large Bio-retention cells, therefore; the surface area of bioretention BMPs should be at or below 5,000 square feet. Surface Area Required: 4,835 Surface Area Provided:'9,670 sf Soil Mix/Media 85% 85-88 percent by volume sand 10% 8 to 12 percent fines (silt and clay), and 5% 3 to 5 percent organic matter (such as peat moss) 20 P-Index between 10 and 30 2"/hr Permeability between 1 and 6 inches per hour, and 1-2 inches per hour is preferred. 3 ft 2 feet minimum media depth for grassed cells, 3 feet for shrub/tree cells or when using IWS. Under Drains less than 2 in/hr Where the infiltration rate is less than 2 in/hr 16 Clean -out pipes must be provided (minimum one per every 1,000 square feet of surface area). Yes Clean out pipes must be capped. Drainage Considerations 2 hr Ponded Water Draw Down 24 hr 24 inches below Draw Down NA Soil surface (under drains provided) Ponded water shall completely drain into the soil within 12 hours and drain to a level of 24 inches below the soil surface within 48 hours. rm wV'uruou uY �• yr Orof W A 7F,i, TA01 NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM BIORETENTION CELL SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Pad III) must be printed, filled out and submitted along with all of the required information. If. PROJECT INFORMATION Project name Ft. Bragg Conterencing and Catering Center Contact name F. Virginia Norton, PE Phone number 919.424.3740 Date March 28, 2013 Drainage area number Upper Drainage Area 1 II. DESIGN INFORMATION Site Characteristics Drainage area 77,101 f? Impervious area 48,352 f? Percent impervious 62.7% % Design rainfall depth 1.0 inch Peak Flow Calculations Is pretpost control of the 1-yr, 24-hr peak flow required? Y (Y or N) 1-yr, 24-hr runoff depth 3.07 in 1-yr, 24-hr intensity 5.22 in/hr Pre -development 1-yr, 24-hr peak flow 4.500 ft'/sec Post -development 1-yr, 24-hr peak flow 6.600 h'/sec Pre/Post 1-yr, 24-hr peak control 2.100 It'/sec Storage Volume: Non -SA Waters Minimum volume required 3,948.0 ft' Volume provided 7,672.0 h' OK Storage Volume: SA Waters 1.5" runoff volume it' Pre -development 1-yr, 24-hr runoff 0 Post -development 1-yr, 24-hr runoff it Minimum volume required 0 h' Volume provided h' Cell Dimensions Ponding depth of water 12 inches OK Poni ing depth of water 1.00 it Surface area of the top of the bioretention cell 9,670.0 it OK Length: 120 ff OK Width: 40 it OK -or- Radius It Media and Sails Summary Drawdown time, ponded volume 2 hr OK Drawdown time, to 24 inches below surface 24 hr OK Drawdown time, total: 26 hr In -situ soil: Soil permeability 0.00 in/hr Insufficient. Increase infiltration rate or include underdrains. Planting media soil: Soil permeability 2.00 infhr OK Soil composition % Sand (by volume) 85% OK % Fines (by volume) 10% OK Form SW401-Bioretenlion-Rev.8 June 25, 2010 Pans 1 ane II. Design Summary, Page 1 of 3 %Organic (by volume) 5% OK Total: 100% Phosphorus Index (P-Index) of media 20 (unitless) OK Form SW401-Bioretention-Rev.8 June 25. 2010 Pans I and II. Design Summary. Page 2 of 3 Basin Elevations Temporary pool elevation Type of bioretention cell (answer 'Y' to only one of the two following questions): Is this a grassed cell? Is this a cell with treestshrubs? Planting elevation (top of the mulch or grass sod layer) Depth of mulch Bottom of the planting media soil Planting media depth Depth of washed sand below planting media soil Are underdrains being installed? How many clean out pipes are being installed? What factor of safety is used for sizing the underdrains? (See BMP Manual Section 12.3.6) Additional distance between the bottom of the planting media and the bottom of the cell to account for underdrains Bottom of the cell required SHWT elevation Distance from bottom to SHWT Internal Water Storage Zone (IWS) Does the design include IWS Elevation of the top of the upturned elbow Separation of IWS and Surface Planting Plan Number of tree species Number of shrub species Number of herbaceous groundcover species Additional Information Does volume in excess of the design volume bypass the bioretention cell? Does volume in excess of the design volume flow evenly distributed through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute flow? Is the BMP located at least 30 feet from surface waters (50 feel if SA waters)? Is the BMP located at least 100 feet from water supply wells? Are the vegetated side slopes equal to or less than 3:1? Is the BMP located in a proposed drainage easement with access to a public Right of Way (ROW)? Inlet velocity (from treatment system) Is the area surrounding the cell likely to undergo development in the future? Are the slopes draining to the bioretention cell greater than 20%? Is the drainage area permanently stabilized? Pretreatment Used (Indicate Type Used with an'X' in the shaded cell) Gravel and grass (81nches gravel followed by 3-5 it of grass) Grassed Swale Forebay Other 232.00 fmsl N (Y or N) Y (Y or N) OK media depth 231.16 fmsl 4 inches OK 228 fmsl 3.16 It Oh Y (Y or N) 16 OK 2 OK 1 it 227 fmsl 225 fmsl 2 It OK Y (Y or N) fmsl 231.16 It I Y (Y or N) OK NVALUEI Y (Y or N) OK it N (Y or N) Show how flow is evenly distributed. Y (Y or N) Y (Y or N) Y (Y or N) N (YorN) f/sec OK OK OK Insufficient ROW location. N (Y or N) OK N (Y or N) OK Y (YorN) OK X OK Form SW401-Bioretentlon-Rev.e June 25, 2010 Parts I and II. Design Summary, Page 3 of 3 (to W essgrred by DwQ III. REQUIRED ITEMS CHECKLIST 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. Page/ Plan Initia Sheet No. tj" j f 1. Plans (1' - W' or larger) of the entire site showing: Design at ultimate build -out, - Oh -site drainage (if applicable), • Delineated drainage basins (include Rational C coefficient per basin), - Cell dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Clean out pipe locations, - Overflow device, and • Boundaries of drainage easement. p ci oL 2. Plan details IV = 30' or larger) for the bioretention cell showing: - Cell dimensions - Pretreatment system, - High flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), • Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. Indicate the P-Index between 10 and 30 G V 3. Section view of the bioretention cell (1' = 20' or larger) showing: V Q A -pp 0V Vi L-tot C'_111 VW —N-5 VP �D /M N� - Side slopes, 3:1 or lower - Underdrain system (if applicable), and Bioretention cell layers [ground level and slope, pre-treatment, ponding depth, mulch depth, fill media depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable), SHWT level(s), and overflow structure) 4. 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 DWO, by completing 8 submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (Imsl). Results of soils tests of both the planting soil and the in situ soil must include: - Soil permeability, • Soil composition (% sand, % fines, % organic), and P-index. 5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing: - A variety of suitable species, • Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, - A planting detail, - The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. 6. A construction sequence that shows how the bioretention cell will be protected from sediment until the entire drainage area is stabilized. 7. The supporting calculations (including underdrain calculations, it applicable). 8. A copy of the signed and notarized inspection and maintenance (18M) agreement. 9. A copy of the deed restriction. Form SW401-13ioreleMbnRev.7 Pan III, Page 1 of 1 Permit No. (to be provided by DWO) �y of W A �req STORMWATER MANAGEMENT PERMIT APPLICATION FORM ° `C NCDENR 401 CERTIFICATION APPLICATION FORM DRY EXTENDED DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all the required information. Project name Ft. Bragg Conferencing and Catering Center Contact person F. Virginia Norton, PE Phone number 919.424.3740 Date 3282013 Drainage area number Lower No. 2 Site Characteristics Drainage area 177,289.00 f' Impervious area 118,918.00 hz % Impervious 0.67 Design rainfall depth 1.00 in Peak Flow Calculations 1-yr, 24-hr rainfall depth 3.07 in Rational C, pre -development 0.61 (unitless) Rational C, post -development 0.74 limitless) Rainfall intensity: 1-yr. 24-hr storm 5.22 in/hr Pre -development 1-yr, 24-hr peak flow 12.90 its/sec Post -development 1-yr, 24-hr peak flow 15.60 fti/sec Pre/Post 1-yr, 24-hr peak control 2.70 Its/sec Storage Volume: Non -SA Waters Minimum required volume 9,658.00 its Provided volume 9,800.00 fls OK Sediment storage volume provided 2,450.00 fls OK Storage Volume: SA Waters 1.5' runoff volume to Pre -development 1-yr, 24-hr runoff volume its Post -development 1-yr, 24-hr runoff volume its Minimum required volume its Provided volume its Sediment storage volume provided its Basin Design Parameters Drawdown time 2.00 days OK SHWT elevation 221.00 Imsl Basin bottom elevation ' 223,50 Imsl Of Storage elevation -226.25 fmsl Basin side slopes 3.0 :1 OK Top elevation 229.00 fmsl OK Freeboard provided - 4.50 it OK Basin Bottom Dimensions Basin length 90•00 it Basin width 60.00 it Length to width ratio 1.50 :1 OK Form SW 401-Dry Extended Detention Bas!nRsv.3 Pans I. a II. Design S rnmary, Page 1 of 2 Permit (to be Provided by DWO) Additional Information Total runoff volume captured by basin 4.07 ac-in Forebay is not required Forebay provided N (Y or N) Is basin in a recorded drainage easement? N (Y or N) Need to a recorded drainage easement Does basin capture all runoff at ultimate build -out? Y (Y or N) OK Is a sediment depth indicator included? Y (Y or N) OK Does the basin include a drain? Y (Y or N) OK Form SW 401 -Dry Extended Detention Basin-rtev.3 Pads I. 3 If. Design Summary, Page 2 of Permit No. (to be provided by DWQ) III. REQUIRED ITEMS CHECKLIST 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. Page/ Plan Initials Sheet No. FVN C-108, C•507 1. Plans (1' - 50' or larger) of the entire site shoving: f • Design at ultimate build -out, J, N - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, • Maintenance access, - Proposed drainage easement and public right of way (ROW), • Overflow device, and • Boundaries of drainage easement. FVN C-108, C•507 2. Plan details (1' = 30' or larger) for the bioretention cell showing: - Basin dimensions Pretreatment system, - Maintenance access, - Outlet structure, - Overflow device, - Flow distribution detail for basin inflow, and - Vegetation specifications. FVN C-507 3. Section view of the basin (1' = 20' or larger) showing: • 1 Side slopes, 3:1 or lower, Pretreatment and treatment areas, and Inlet and outlet structures. FVq C-507 6. A construction sequence that shows how the dry detention basin will be protected from sediment until the \XX entire drainage area is stabilized. FVN, App D 7. The supporting calculations. 'A App H 8. A copy of the signed and notarized operation and maintenance (08M) agreement. FVNr 4� N/A - federal 9. A copy of the deed restrictions (if required). App G 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Dry Extended Detention Basin-Rev.3 Pan III. Required Items Checklist, Page 1 of 1 °off 9=Of AwAre��rree���\l� STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT This form must be completely filled out, printed, Initialed, and submitted. Project name Contact name Phone number Date Drainage area number The purpose of the LS-VFS Stormwater enters LS-VFS from Type of VFS Explanation of any 'Other' responses above If Stormwater Enters the LS-VFS from the Drainage Area Drainage area Impervious surface area Percent impervious Rational C coefficient Peak flow from the 1 inthr storm Time of concentration Rainfall intensity,10-yr storm Peak flow hom the 10-yr storm Design storm Maximum amount of flow directed to the LS-VFS Is a flow bypass system going to be used? Explanation of any 'Other responses above If Stormwater Enters the LS-VFS from a BMP Type of BMP Peak discharge from the BMP during the design storm Peak discharge from the BMP during the 10-year storm Maximum capacity of a 100-foot long LS-VFS Peak flow directed to the LS-VFS Is a flow bypass system going to be used? Explanation of any 'Other' responses above Ft. Bragg Conferencing and Catering Center R Virginia Norton, PE 919.424.3740 3I21W013 Lower No. 2 removal: 40% TSS, 30% TN, 35% TP A BMP Engineered filter strip (graded & sodded, slope < 9%) Do not complete this section of the form. 1e Do not complete this section of the form. % Do not complete this section of the form. Do not complete this section of the form. cfs Do not complete this section of the fore. min Do not complete this section of the form. inthr Do rat complete this section of the form. cts Do not complete this section of the form. Pick one: cts Do not complete this section of the form. (Y or N) Do not complete this section of the form. Other. Explained below 0.54 cis 0.54 cis 10 cis 0.54 cis N (Y or N) Flow enters LS-FS from dual dry detention basins in series Form SW401 - LS-VFS - 29June2012 - Rev.10 page 1 of 3 LS-VFS Design Forebay surface area Depth of forebay at slormwater entry point Depth of lorebay at stormwater exit point Feet of level lip needed per cls Computed minimum length of the level lip needed Length of level lip provided Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS Slope (from level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector swale at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below): M B W y (flow depth for 10-year storm) freeboard (during the 10-year storm) Peak velocity in the channel during the 10-yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any 'Other responses above 0 sq 0 No forebay is required. in in 10 fVcfs 5 a Ten feet is the minimum level spreader length. 30 n 30 it 222.65 hnsl 222.50 tmsl 0.50 % N (Y or N) OK N (Y or N) N (Y or N) h It If If It fvsec Pick one: (Y or N) (Y or N) Form SW401 - LS-VFS . 29June2012 - Rev.10 page 2 of 3 III. REQUIRED ITEMS CHECKLIST EDIT 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. Requried Item: 1. Plans (I- - 50' or larger) of the entire site showing: - Design at ultimate build -out. • OH -site drainage (if applicable), • Delineated drainage basins (include Rational C coefficient per basin), - Forebay (it applicable), - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), and - Boundaries of drainage easement. 2. Plan details (I * = 30' or larger) for the level spreader showing: • rY • Forebay (it applicable), - High flow bypass system, - One toot tope lines between the level lip and top of stream bank, - Proposed drainage easement, and • Design at ultimate build -out. 3. Section view of the level spreader (1' = 20' or larger) showing: v - Underdrain system (if applicable), - Level lip, - Upslope channel, and - Downslope filter fabric. 4. Plan details of the [low splitting device and supporting calculations (if applicable). 5. A construction sequence that shows how the level spreader will be protected from VIA sediment unfit the entire drainage area is stabilized. 6. If a non -engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present. `' 7. The supporting calcllations. V 8. A copy of the signed and notarized operation and maintenance (08M) agreement. V Page or plan sheet number and any notes: C-108. C-507 08,C-507 Form SW401 - LS-VFS - 29June2012 - Rev.10 page 3 of 3 Permit Number: (to he provided by DWQ) Drainage Area Number: Filter Strip, Restored Riparian Buffer and Level Spreader Operation and Maintenance Agreement I will keep a maintenance record on this 13MP. 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: — Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation — Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. — Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC, 1993). Forested filter strips do not require this type of maintenance. — Once a year, the soil will be aerated if necessary. — Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County). Records of operation 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: Potential.problem: How 1 will remediate theproblem: The entire filter strip Trash/debris is present. Remove the trash/debris. system The flow splitter device The Flow splitter device is Unclog the conveyance and dispose (if applicable) clogged. of any sediment off -site. The Flow splitter device is Make any necessary repairs or damaged. replace if damage is too large for repair. Form SWU401-1-evel Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3 BMP element: Potentialproblem: How I will remediate theproblem: The Swale and the level The Swale is clogged with Remove the sediment and dispose lip sediment. of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a berm end of the level spreader that that is higher than the level lip, and shows stonnwater has then plant a ground cover and bypassed it. water until it is established. Provide lime and a one-time fertilizer application. Trees or shrubs have begun Remove them. to grow on the Swale or just downslo pe of the level lip. The bypass channel Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then reestablish proper erosion control. 'turf reinforcement is Study the site to see if a larger damaged or ripap is rolling bypass channel is needed (enlarge if downhill. necessary). After this, reestablish the erosion control material. The filter strip Crass is too short or too long Maintain grass at a height of if applicable). approximately three to six inches. Areas of bare soil and/or Regrade the soil if necessary to 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. Sediment is building up on Remove the sediment and the filter strip. restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Plants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality local Regional Office, or the outlet. 1 401 Oversight Unit at 919-733-1796. Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer 0RM-Rev.3 Page 2 of 3 Permit Number: (to be provided by DIVA) I acknowledge and agree by my signature below that I am responsible for the perfonnance 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: Fort Brags: Conferencing and Catering Center BMP drainage area number: Print name: Mr. David Heins Title: Ft. Braga Directorate of Public Works (DPW) /Chief -Environmental Division Address: 2175 Reilly Road Stop A, Fort Bragg, NC 28310-5000 Date: tt / (3 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, , a Notary Public for the State of day of County of , do hereby certify that personally appeared before me this and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. Witness my hand and official seal, SEAL My commission expires Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3 Permit Number: (m be provide! by DN'Q) Drainage Area Number: Dry Extended Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. 'Phis 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. The dry extended detention basin system is defined as the dry detention basin, outlet structure, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ® does ❑ does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ® does not incorporate pretreatment other than a forebay. Important maintenance procedures: — The drainage area will be managed to reduce the sediment load to the dry extended detention basin. — Immediately after the dry extended detention basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — No portion of the dry extended detention pond will be fertilized after the first initial fertilization that is required to establish the vegetation. — I will maintain the vegetation in and around the basin at height of approximately six inches. — Once a year, a dam safety expert will inspect the embankment. After the dry extended detention 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 operation 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 dry Areas of bare soil and/or Regrade the soil if necessary to extended detention erosive gullies have formed, remove the gully, and then plant a basin ground cover and water until it is established. Provide lime and a one-time fertilizer application. Form SW401-Dry Detention O&M-Rev3 Page I of 4 BMP element: Potentialproblem: How I will remediate theproblem: 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. 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 (see diagram below). 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 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 (see diagram below). dispose of it in a location where it will not cause impacts to streams or the BMP. Revegetate disturbed areas immediately with sod (preferred) or seed protected with securely staked erosion mat. Water is standing more than Check outlet structure for clogging. 5 days after a storm event. If it is a design issue, consult an appropriate professional. 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). Form SW401-Dry Detention O&M-Rev3 Page 2 of 4 BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs or trees have started Remove shrubs or trees to grow on the embankment. immediately. Grass cover is unhealthy or Restore the health of the grass cover eroding. - consult a professional if necessary. Signs of seepage on the Consult a professional. downstream face. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present, consult a professional to remove beavers. 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. 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 basin depth reads 224.5 feet in the main pond, the sediment shall be removed. When the basin depth reads N/A feet in the forebay, the sediment shall he removed. Sediment Removal Bottom BASIN DIAGRAM (fill in the blanks) Temporary Pool Elevation 226.25 VA i Te porm Pool cmpon --------- - -- - -- plume Sediment Removal Elevation 224.5 Volur kN/A 2 25%--------------------------------------�----- Sediment \ Bottom Elevation Storage FOREBAY MAIN POND Form SW401-Dry Detention O&M-Rev.3 Page of 4 Permit Number: (to be provided by DIVA) I acknowledge and agree by my signature below that I am responsible for the performance of the 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. Project name:Fort Bragg Conferencine and Catering Center BMP drainage area nun Print name: Mr. David Heins Title: Ft. Brags; Directorate of Public Works (DPW) /Chief -Environmental Division Address: 2175 Reilly Road Stop A, Fort Bragi;, NC 28310-5000 Date: / a 4t4,, / 3 Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I, , a Notary Public for the State of County of , do hereby certify that personally appeared before me this day of , and acknowledge the due execution of the forgoing dry detention basin maintenance requirements. Witness my hand and official seal, SEAL My commission Form SW401-Dry Detention O&M-Rev.3 Page 4 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number:_ Bioretention Operation and 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 13MP 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 operation and maintenance procedures: — Immediately after the bioretention cell is established, the plants will be watered twice weekly if needed until the plants become established (commonly six weeks). — Snow, mulch or any other material will NEVER be piled on the surface of the bioretention cell. — Heavy equipment will NEVER be driven over the bioretention cell. — Special care will be taken to prevent sediment from entering the bioretention cell. — Once a year, a soil test of the soil media will be conducted. After the bioretention cell is established, I will inspect it once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation 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: Potentialproblems: 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 bioretention cell 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, The pipe is clogged (if Unclog the pipe. Dispose of the stone verge or 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. Stone verge is clogged or Remove sediment and clogged covered in sediment (if stone and replace with clean stone. applicable). Form SW401-Bioretention O&M-Rev.3 Page 1 of 4 BMP element: Potentialproblems: 1-low I will remediate theproblem: The pretreatment area Flow is bypassing Regrade if necessary to route all pretreatment area and/or flow to the pretreatment area. gullies have formed. Restabilize the area after grading. Sediment has accumulated to Search for the source of the a depth greater than three sediment and remedy the problem if inches. possible. Remove the sediment and restabilize the pretreatment area. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. The bioretention cell: Best professional practices Prune according to best professional vegetation show that pruning is needed practices. to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Tree stakes/wires are present Remove tree stake/wires (which six months after planting. can kill the tree if not removed). The bioretention cell: Mulch is breaking down or Spot mulch if there are only random soils and mulch has floated away. void areas. Replace whole mulch layer if necessary. Remove the remaining much and replace with triple shredded hard wood mulch at a maximum depth of three inches. Soils and/or mulch are Determine the extent of the clogging clogged with sediment. - remove and replace either just the top layers or the entire media as needed. Dispose of the spoil in an appropriate off -site location. Use triple shredded hard wood mulch at a maximum depth of three inches. Search for the source of the sediment and remedy the problem if ossible. An annual soil test shows that Dolomitic lime shall be applied as pl-1 has dropped or heavy recommended per the soil test and metals have accumulated in toxic soils shall be removed, the soil media. disposed of properly and replaced with new planting media. Form SW401-Bioretention O&M-Rev.3 Paget of BMP element: Potentialproblems: How I will remediate theproblem: The underdrain system Clogging has occurred. Wash out the underdrain system. if applicable) The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose of the sediment off -site. The drop inlet is damaged Repair or replace the drop inlet. 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. 733-1766. Form SW401-Bioretention O&M-Rev.3 Page 3 of 4 Pennit Number: (Io be provided by DWQ 1 acknowledge and agree by my signature below that 1 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:Fort Bragg Conferencing and Catering Center BMP drainage area number: Print name: Mr. David Heins Title: Fort Bragg Directorate of Public Works (DPW)/Chief-Environmental Division Address: 2175 Reilly Road Stop A, Fort Braga, NC 29310-5000 Date:�J / 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. a Notary Public for the State of , County of , do hereby certify that personally appeared before me this day of , and acknowledge the due execution of the forgoing bioretention maintenance requirements. Witness my hand and official seal, SEAL My commission Form SW401-Bioretention I&M-Rev. 2 Page 4 of 4