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HomeMy WebLinkAboutSW7110209_CURRENT PERMIT_20110304STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATEG10� YYYYMMDD :r NCDENR North Carolina Department of Environment and Division of Water Quality Beverly Eaves Perdue Colleen H. Sullins Governor Director March 4, 21011 Mr. David H. Twiford, Manager Twiford Currituck Properties, LLC Oj 405 East Church Street Elizabeth City, NC 27909 Dear Mr. Twiford: WOLRO Natural Resources Subject: Stormwater Permit No. SW7110209 TwiTord Funeral Home High Density Commercial Wet Pond Project Currituck County Dee Freeman Secretary The Washington Regional Office received a complete Stormwater Management Permit Application for Twiford Funeral Home on February 23, 2011. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Session Law 2008-211 and Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7110209 dated March 4, 2011, for the construction of the subject project. This permit shall be effective from the date of issuance until March 4, 2021, 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 adfudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Scott Vinson, or me at (252) 946-6481. incer y, Al of 9 Regional Supervisor Surface Water Protection Section AH/ sv: K:\WQS\STORMWATER\PERMIT\SW7110209 cc: Doug Abbot, PE — Hyman & Robey Currituck County Building Inspections shington Regional Office North Carolina Division of Water Quality Internet: w .rrmaterquality.org T�TOne 7., 943 Washington Square Mall Phone: 252-946-6481 \ FAX: 252-946-9215 1 � Or th Car011 1 na Washington, NC 27889 FAX: 252-946-9215 y�`� An Equal Opportunity\ Affirmative Action Employer ;Vatu!ra W State Stormwater Management Systems Permit No. SW7110209 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 Twiford Currituck Properties, LLC Twiford Funeral Home at 280 Macendonia Church Rd., Poplar Branch, Currituck County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of Session Law 2008-211 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 March 4, 2021, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.7 of this permit. The stormwater control has been designed to handle the runoff from 56,935 square feet of impervious area. The tract will be limited to the amount of built -upon area indicated in Section I. of this permit, and per approved plans. The built -upon area for the future development is limited to 25,000 square feet. 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. 5. 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 built -upon areas associated with this project shall be located at least 50 feet landward of all perennial and intermittent surface waters. Page 2 of 7 State Stormwater Management Systems Permit No. SW7110209 W The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, acres: 3.00 b. Total Impervious Surfaces, ftz: 56,935 C. Design Storm, inches: 1.50 d. Pond Depth, feet: 3.50 average — 5.50 total e. TSS removal efficiency: 90 % f. Permanent Pool Elevation, FMSI : 6.50 9. Permanent Pool Surface Areq, ft : 7,717 h. Permitted Storage Volume, ft : 9,427 at temporary pool el i. Temporary Storage Elevation, FMSL: 7.50 j. Predevelopment 1 year 24 hour: 5.22 cfs k. Post development 1 year 24 hour: 10.28 cfs — 0.05 cfs from pond I. Controlling Orifice: 1.75"0 pipe. M. Permitted Forebay Volume, ft3: 4,185 n. Fountain Horsepower, HP 0, (fountain not allowed) o. Receiving Stream/River Basin: Currituck Sound / Pasquotank P. Stream Index Number: 30 — 1 q. Classification of Water Body: "SC" II. SCHEDULE OF COMPLIANCE 1. 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 time 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 re -vegetation of slopes and the vegetated filter strip. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device, level spreader, filter strip, catch basins and piping. g. Access to the outlet structure must be available at all times. 4. Records of maintenance activities must be kept for each permitted BMP. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 6. Decorative spray fountains will be not allowed in the stormwater treatment system. 7. The facilities shall be constructed as shown on the approved plans. This permit shall become void unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. Page 3 of 7 State Stormwater Management Systems Permit No. SW7110209 8. 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. 9. 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. 10. 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. 11. 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. 12. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 13. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. III. GENERAL CONDITIONS 1. 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, to the Division of Water Quality, signed by both parties, and accompanied by supporting documentation as listed on page 2 of the form. The project must be in good standing with the Division. 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. 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. Page 4 of 7 State Stormwater Management Systems Permit No. SW7110209 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. 5. 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. 7. 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. 8. 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 2008- 211, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al. 11. The permittee shall notify the Division of any name, ownership or mailing address changes at least 30 days prior to making such changes. 12. This permit shall be effective from the date of issuance until March 4, 2021. 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 4`h day of March, 2011. ENVIRONMENTAL MANAGEMENT COMMISSION for Uoleen H. Sullins, Ulrector Division of Water Quality By Authority of the Environmental Management Commission Stormwater Permit No. SW7110209 z Page 5 of 7 State Stormwater Management Systems Permit No. SW7110209 Twiford Funeral Home Stormwater Permit No. SW7110209 Currituck County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL Page 6 of 7 State Stormwater Management Systems Permit No. SW7110209 ' Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The outlet/bypass structure elevations are per the approved plan. 6. The outlet structure is located per the approved plans. 7. Trash rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short- . circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. Required drawdown devices are correctly sized per the approved plans. 13. All required design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 15. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Washington Regional Office Currituck County Building Inspections Page 7 of 7 DWQ USE ONLY Date Received Fee Paid r.Ktt ZSi 3 Permit Number �XjD6 m t± Fcr_o Applicable Rules: ❑ Coastal SW -1995 Coastal W - 2008 ❑ Ph II - Post Construction (select all tlrlOt-Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ Mgmt Plan: State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans specifications, letters, operation and maintenance agreements, etc.): Twiford Funeral Home 2. Location of Project (street address): 280 Macendonia Church Road City:Ponlar Branch County:Currituck Zip:27965 3. Directions to project (from nearest major intersection): From the intersection of Hwy 158 and Hwy 168 in Barge, travel south on Hwy 158 approximately 8.8 miles Turn left onto NC Hwy 136, Macendonia Church Road The project is located on the north side of the road approximateey 1500' from Hwy 158. 4. Latitude:360 16' 26.80" N Longitude:75° 54' 20.25" W of the main entrance to the project. II: PERMIT INFORMATION: 1. a. Specify whether project is (check one): ®New ❑Modification b. if this application is being subm tted 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: 4 ac of Disturbed Area ❑NPDES Industrial Stormwater ❑404/401 Permit: Proposed Impacts b.If 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-101 Version 07July2009 Page 1 of 6 III. CONTACT INFORMATION 1, a. Print Applicant / Signing Official's naive and title (specifically the developer, property owner, lessee, designated government official, individual, etc. who owns the project): Applicant/Organization: Twiford Currituck Properties, LLC Signing Official & Title: David H. Twiford, Manager b.Contact information for person listed in item 1a above: Street Address: 405 East Church Street City: Elizabeth Cites State: NC Zip: 27909 Mailing Address (if applicable): Post Office Drawer 405 City: Elizabeth City State: NC Zip: 27907-0405 Phone: (252 ) 3354395 Email: Dayid.T W iford@twi ford fh.com Fax: ( ) 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. (This is the person who owns the property that the project is located on): Property Owner/Organization: Laurel Memorial Gardens, Inc. Signing Official & Title: David H. Twiford, President b.Contact information for person listed in item 2a above: Street Address: 405 East Church Street City: Elizabeth City State: NC Zip: 27909 Mailing Address (if applicable): Post Office Drawer 405 City: Elizabeth City State: NC Zip: 27907-0405 Phone: ( 252 ) 3354395 Fax: ( ) Email: DayidTWiford@twifordfh.com 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: Signing Official & Title: b. Contact information for person listed in item 3a above: Mailing Address: City: State: Phone: ( ) Fax: ( ) Email: 4. Local jurisdiction for building permits: Currituck County Point of Contact: Donna Voliva, Planner Phone q: (252 ) 232-6032 Form SWU-101 Version 07July2009 Page 2 of 6 rV. PROJECT INFORMATION 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. All stormwater runoff will sheet flow away from the building and be collected in grass lined swales. The grass lined swales will drain to an existing: drainage swale that bisects the propeM and drains to the rear of the: site directly into Maple Swamp. 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.Identify the regulation(s) the project has been designed in accordance with: ❑ Coastal SW -1995 ❑ Ph II - Post Construction 3. Stormwater runoff from this project drains to the Pasquotank River basin. 4. Total Property Area: 3.00 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*: 3.00 acres Total project area shall be calculated to exclude the following doe normal Pool of impp�o�u��nded structures, the area between the banks of streams and rivers, the area below the Normal High Water (N;9 line or Mean High Water (MHW) line, and coastal wetlands landward from the NHW (or MHVQ line. The resultant project area is used to calculate overall percent built upon area (BUA). Non -coastal wetlandslandwardof the NHW (orMH1M line may be included in the total project area. 8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 43,56 % 9. How many drainage areas does the project have? 1 (For high density, count 1 for each proposed engineered stormwater BMP. For low density and other projects, use 1 for the 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 Drainage Area _ Drainage Area _ Drains a Area Receiving Stream Name Currituck Sound :e S Stream Class * SC Stream Index Number • 30-1 Total Drainage Area (so 130,705 On -site Drainage Area (so 130,705 Off -site Drainage Area so 0 Pro osed Impervious Area" (so 56,935 % Impervious Area"` total 43.56 Impervious' Surface Area Drainage Area 1 Drainage Area _ Drainage Area _ Drainage Area On -site Buildings/Lots (so 4,610 _ On -site Streets (so On -site Parkin (sf) 26,327 On -site Sidewalks (so 998 Other on -site s Future (so 25,000 Off -site (so Existing BUA*** (sf) Total sf): 56,935 Stream Class and Index Number can be determined at: httpVlh2o.enr.state.ne.us/ ms/reports/reportsWB htnd " Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that is to be reproved and which will be replaced by new BUA. Form SWU-101 Version 073u1y2009 Page 3 of 6 11. How was the off -site impervious area listed above determined? Provide documentation. N/A Protects in Union Countv:Contact DWQ Central Office staffto check if the project is located within a Threatened & Endangered Species watershed that maybe subject to more stringent stormwater requirements as per NCAC 02B .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 fromhttp://h2o.enr.state.ne.us/su/bmt) forms.htm. 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 http://h2o.enr.state.nc.us/su/bmp forms.htm. 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://h2o.enr.state.nc.us/su/msi maps.htm.) 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://h2o.enr.state.nc.us/su/bmp forms.htm. 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 VfI below) 3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M agreement(s) for each BMP, tywo �rnb "l1� 4. Permit. application processing fee of,$59Ffpayable to N`CDENR. (For x�ress revietw refer to ht!R://www.envhelp.org/pages/onestopexpress.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 treatment/managementfor the project. This is required in addition to the brief summary provided in the Project Information, item 1. 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 1h mile of the site boundary, include the 1h mile radius on the map. 7. Sealed, signed and dated calculations. 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. 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). Form SWU-101 Version 07July2009 Page 4 of 6 Copy of any applicable soils report with the associated SHWT elevations (Please identify A copy of the most current property deed. Deed book: 1093 Page No: 255 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 Ia, 2a, and/or 3a per NCAC 2H.1003(e). The corporation or LLC 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.nc.us/Corporations/CSearch.aspx VIL DEED RESTRICTIONS AND PROTECTIVE COVENANTS 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"xl1" 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 far DWQ to verify the SHWT prior to submittal, (910) 796-7378.1 TO 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 http://h2o.enr.state.nc.us/su/bml2 forms.htmtldeed restrictions. 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: Doug Abbott, PE Consulting Firm: Hyman & Robey, PC Mailing Address:P. O. Box 339 Phone: (252 ) 337-8926 Email:—doug@hymanrobey.com State: NC Zip: 27921 Fax: (252 ) 338-5552 IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this section) I, (print or type name of person listed in Contact Information, item 2a) David H. Twiford certify that I own the property identified in this permit application, and thus give permission to (print or type name of person listed in Contact Information, item la) David H. Twiford with (print or type name of organization listed in Contact Information, item lb) Twiford Currituck Properties, LLC 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. Form S WU-101 Version 07July2009 Page 5 of 6 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 violati f NC General Statue 143-215.1 and may result in appropriate enforcement action including the assessment o ci it penalti s of 25,000 p wtta} pursuant to NCGS 143-215.6. Signature: - �4 Datei.;--a,-9/ o a Nry Public for the State of // �� (d A 6t,4-County of do hereby certify that _ personally appeared befo me this day of 1_ AA4 , � and acknowledge the due execution of the application for a stormwater permit. Witness my hand And official seal, `�vY t JO NOTARY N PUBLIC G 0'q N KG0J� `�' ' X. APPLICANT'S CERTIFICATION SEAL My commission expires o W I, (print or type mmne of person listed in Contact Information, item 2) David H. Twiford 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�r Hants will be recorded, and that the proposed project complies with the requirements of the applicable stgfmw iter rulesyyndeyr 1�5,1 NCAC 21-1.1000, SL 2006-246 (Ph. II - Post Construction) or SL 2008-211. D4�,, l -Z011 `— t/ a N tary Public for the State of "e ounty of do hereby certify that �QdrLAJ!. o� / personally appeared this,A day of-�"�e.,CI WkW- .;? 0i and acknowledge the due execution of the application for a stormwater permit. Witness my hand 0PFY t I =� NOTARY eye 'D PUBLIC z :p 'zp2ANK1CO official seal, SEAL My commission expires. /t//h'lot .) ! ry o�ll 'f Form SWU-101 Version 07July2009 Page 6 of Permit No. t�pp}�����Jy�// y�pp��((� C /`/`qq (to be provded by DWO) E—EXPRESS ESS FEB 2 3 22011 IVA NW DENR 0C,p WA7F9 `, O G h � NENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET 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 of the required information. I. PROJECT INFORMATION Project name Twiford Funeral Home Contact person Sean C. Robey, PE Phone number 252-335-2888 Date 15-Feb-11 Drainage area number 1 II. DESIGN INFORMATION Site Characteristics Drainage area 130,705 ff' Impervious area, post -development 56,935 ff' %impervious 43.56 % Design rainfall depth 1.5 in Storage Volume: Non -SA Waters Minimum volume required 8,632 N' OK Volume provided 9,427 fl' OK, volume provided is equal to or in excess of volume required. Storage Volume: SA Waters 1.5' runoff volume NIA ft' Pre -development 1-yr, 24-hr runoff ff' Post -development 1-yr, 24-hr runoff It Minimum volume required N/A ff' Volume provided ff' Peak Flow Calculations Is the pre/post control of the 1yr 24hr storm peak flow required? Y (Y or N) 1-yr, 24-hr rainfall depth 3.4 in Rational C, pre -development 0.30 (unitless) Rational C, post -development 0.47 (unitless) Rainfall intensity: l-yr, 24-hr storm 3.40 inthr OK Pre -development 1-yr, 24-hr peak flow 5.22 ft°Isec Post -development 1-yr, 24-hr peak flow 10.28 ffl/sec PrelPost 1-yr, 24-hr peak flow control 5.06 ffslsec Elevations Temporary pool elevation 7.50 fm tM (�`4sl \\ ///// Permanent pool elevation 6.50 fmsl `�\ Q` • . • . , �� // SHWT elevation (approx. at the perm. pool elevation) 6.50 fmsl � ��,'0 •�,T Top of 10ff vegetated shelf elevation 7.00 fmsl � Bottom of 1Oft vegetated shelf elevation 6.00 fmsl _ $E� Sediment cleanoul, lop elevation (bottom of pond) 1.00 fmsl 3�Q��/f�/� Sediment cleanoul, bottom elevation 0.00 fmsl y / ./1� �Qj,��.�(,Y�/� Sediment storage provided 1.00ff • ..{{�� i,/ •:ryQ�NEf4`' Is there additional volume stored above the state -required temp. pool.' Y (Y or N) Elevation of the lop of the additional volume 7.5 first OK Z-- Form SW401-Wet Detention Basin-Rev.5 Paris I. b II. Design Summary, Pagel of 2 •�, 4 �\ • �3?Q11 r = i!�t}f j r�r� A.'�CC �5� Permit No. (to be Provided by DWO) II. DESIGN INFORMATION Surface Areas Area, temporary pool 10,458 ft' Area REQUIRED, permanent pool 5.692 ft' SAIDA ratio 4.36 (unitless) Area PROVIDED, permanent pool, A,,. 7,717 ft Area, bottom of 1011 vegetated shelf, A.. 4,212 If Area, sediment deanout, top elevation (bottom of pond), A.... 805 ftr Volumes Volume, temporary pool 9,427 rya Volume, permanent pool, Vam,-ay 19,147 rya Volume, forebay (sum of forebays if more than one forebay) 4,185 113 Forebay % of permanent pool volume 21.9% % SAIDA Table Data Design TSS removal Coastal SAIDA Table Used? MountainlPiedmonl SAIDA Table Used? SAIDA ratio Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-26) Volume, permanent pool, V,_p,d Area provided, permanent pool, Aa„, as Average depth calculated Average depth used in SAIDA, d,,, (Round to nearest 0.511) Calculation option 2 used? (See Figure 10-2b) Area provided, permanent pool, A._,, Area, bottom of 1 oft vegetated shelf, Awe,,,, Area, sediment cleanout, top elevation (bottom of pond), Ate,. 'Depth' (distance blw bottom of 1Oft shelf and top of sediment) Average depth calculated Average depth used in SAIDA, d,,, (Round to nearest 0.5ft) Drawdown Calculations Drawdown through office? Diameter of odfice (if circular) Area of orifice (if -non -circular) Coefficient of discharge (Ca) Driving head (Ha) Drawdown through weir? Weir type Coefficient of discharge (C.) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Storage volume discharge rate (through discharge odfice or weir) Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of towpath to width ratio Length to width ratio Trash rack for overflow & office? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all mnoff at ultimate build -out? Drain mechanism for maintenance or emergencies 90 % Y (Y or N) N (Y or N) 4.36 (unitless) (Y or N) to flz Y (Y or N) 7,717 fit' 4.212 ftx 805 fit' 5.00 ft 3.20 ft 3.5 It Y (Y or N) 1.75 in in' 0.60 (unitless) 0.33 ft N (Y or N) (unitless) (unitless) ft It 5.22 ft'/sec 10.28 ft/sec 0.05 ft'/sec 2.35 days 3 :1 10 :1 10.0 If 3 :1 3.0 :1 OK P73 OK OK OK OK OK OK OK OK Insufficient post -development peak flow. OK, draws down in 2-5 days. OK, drawdown time is coned. OK OK OK OK OK Y (Y or N) OK 1.0ft OK N (Y or N) OK N (Y or N) Insufficient. Recorded drainage easement required. Y (Y or N) OK pump out Form SW401-Wet Detention Basin-Rem5 Pans 1. & II. Design Summary, Page 2 or 2 Permit (to be provided by DWO) 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. Pagel Plan Initials Sheet No. 4 1. 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, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. 7 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: - Outlet structure with trash rack or similar, - Maintenance access, - Permanent pool dimensions, - Forebay and main pond with hardened emergency spillway, - Basin cross-section, - Vegetation specification for planting shelf, and -Filter strip. 7 3. Section view of the wet detention basin (1"= 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. 5 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. attached 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay, 5 to verify volume provided. 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. �n ZL attached 7. The supporting calculations. attached 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. n/a 9. A copy of the deed restrictions (if required). attached 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-Wet Detention Basin-Rev.5 Part III. Required Items Checklist, Page 1 of 1 ,FEB 2 3 2011 k Permit Number: (to be provided by DWQ) Drainage Area Number: Wet Detention Basin 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 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 wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): ® does ❑ does not incorporate pretreatment other than a forebay. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin: — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected 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 should be kept in a known set location and must 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 wet Areas of bare soil and/or Regrade the soil if necessary to detention 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. Vegetation is too short or too Maintain vegetation at a height of long. I approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 page 1 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the Swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the Swale if necessary to Swale. 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 to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. 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. If pesticide is used, wipe it on the plants rather than s ra mi . The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Detennine 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. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth, dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. I and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4 Permit Number. (to be provided by DWQ) Drainage Area Number. BMP element: Potentialproblem: How 1 will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device isdamaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 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 permanent pool depth reads 5.50 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 3.50 feet in the forebay, the sediment shall be removed. Sediment Removal Bottom BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 6.50 3.00 I Pe nen Pool ---------------+-- Volume Sediment Removal Elevation 1.00 Volume 2.00 ft Min. ------------- ----- Sediment Bottom Elevation 0.00 I-ft r Storage Sedimez Storage FOREBAY MAIN POND Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4 Permit Number: (to be provided by DWQ) acknowledge and agree by my signature below that 1 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: Twiford Funeral Home BMP drainage area number: Print name: David FI. Twiford Title: Manager, Twiford Currituck Properties, LLC Address: 405 E. Church Street, Elizabeth City, NC 27909 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 of , do hereby certify that Jpersonally appeared before me this day of U �, and acknowledge the due execution of the forgoing wet detentioq basin maintenance requirements. Witness my hand and official seal, r:or�P�YIJO���9 NOTARY N PUBLIC z` GOJa��`` 'tttn/I;IIWO\ SEAL My commission expires Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4