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HomeMy WebLinkAboutSW7131206_CURRENT PERMIT_20131220STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE ?T CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE��%`a2r% YYYYMMDD A� NCDENR North Carolina Department of Environment and Natural Resources Division of Energy, Mineral, and Land Resources Land Quality Section Tracy E. Davis, PE, CPM Director December 20. 2013 River Run Apartments, LLC Attn.: Mr. Fred G. Mills, Sr., Manager PO Box 6171 Raleigh, NC 27628 Subject: Stormwater Permit No. SW7131206 River Run Apartments High Density Commercial Wet Pond Project Beaufort County Dear Mr. Mills: W0.710 Pat McCrory, Governor John E. Skvarla, III, Secretary The Washington Regional Office received a complete Stormwater Management Permit Application for the River Run Apartments project on December 13, 2013. 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 21-1.1000. We are forwarding Permit No. SW7131206 dated December 20, 2013, for the construction of the subject project. This permit shall be effective from the date of issuance until December 20, 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 adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150E of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact me at (252) 946-6481. Sincerely, Samir Dumpor, PE Environmental Engineer Washington Regional Office 943 Washington Square Mall, Washington, North Carolina 27889 • Phone: 252-946-6481 / FAX: 252-975-3716 Internet: http://www.portal.ncdenr.org/web/Ir/land-quality An Equal Opportunity I Affirmative Action Employer - 50%Recycled110% Post Consumer Paper SD: G:\LR\SWP\SD\SW7131206 cc: ey�u\� ,Matt Williams, PE, Borum, Wade and Associates (621 Eugene Court, Suite 100, Greensboro, NC 27401) ✓Beaufort County Building Inspections ✓Washington Regional Office STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAND NATURAL RESOURCES DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES 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 River Run Apartments, LLC River Run Apartments Beaufort County FOR THE construction, operation and maintenance of one 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 Energy, Mineral, and Land Resources and considered a part of this permit. This permit shall be effective from the date of issuance until December 20, 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. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.7 of this 1permit. The stormwater control has been designed to handle the runoff from 99,317 square feet of impervious area. 3. The tract will be limited to the amount ofibuilt-upon area indicated in Section I. of this permit, and per approved plans. 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 7. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, ftZ: 198,634 b. Total Impervious Surfaces, ftZ: 99,317 C. Design Storm, inches: 1.5 d. Pond Depth - average, feet: 3.5 e. TSS removal efficiency: 90% f. Permanent Pool Elevation, FMSL: 25.00 g. Permanent Pool Surface Area required, ftZ: 9,932 h. Permanent Pool SurfacsArea, ft : 11,983 i. Min. Volume required, ft : 12,415 j. Permitted Storage Volume, ft3: 13,033 k. Temporary Storage Elevation, FMSL: 26.00 I. Controlling Orifice: 2.00"0 pipe M. Permitted Forebay Volume, ft3: 12,147 n. Receiving Stream/River Basin: Crawford Creek/ Tar -Pam River Basin o. Stream Index Number: 29-6-2 P. Classification of Water Body: "SC; NSW" 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. Mowin.9 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. The permittee shall submit to the Division of Energy, Mineral, and Land Resources an annual summary report of the maintenance inspection records for each BMP. The report shall summarize the inspection dates, results of the inspections, and the maintenance work performed at each inspection. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 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 Page 3 of 7 conditions of this permit, the approved plans and specifications, and other supporting data. 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'iwith this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must1be 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 ias 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. Ill. 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 Energy, Mineral, and Land Resources, 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. 2. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. Page 4 of 7 3. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Energy, Mineral, and Land Resources, 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. 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 December 20, 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 20th day of December, 2013. NORTH CAROLJNA ENVIRONMENTAL MANAGEMENT COMMISSION C for Division of Energy, Mineral, and Land Resources By Authority of the Environmental Management Commission Stormwater Permit No. SW7131206 Page 5 of 7 Certification Requirements: 1. The drainage area to the systemlcontains 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. I 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-DEMLR Washington Regional,Office Beaufort County Building Inspections Page 7 of ;7 River Run Apartments Stormwater Permit No. SW7131206 Beaufort 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 River Run Apartments Stormwater Permit No. SW7131206 Beaufort County Designer's Certification I, hiclmER S. W406 as a duly registered PROFEMOM& ENGINEER in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, RYVER Lry APARTmENTr WET DETrWTzaN Palyp (Project) for RTUER RqW 4PAfTMf-P1TS L C (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: . J SEAL Signature `����•P�\A CAROB' Registration Number G l 0 7 p::oFessio ., ,L , Date 2 �� `=4QSEALV'7' 10771 /4z�R Page 6 of 7 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. 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. v'/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. V___42. Required drawdown devices are correctly sized per the approved plans. �3. All required design depths are provided. ✓_1.4. All required parts of the system are.provided,:such as a vegetated shelf; - land a forebay. r ' ✓f5. The required system dimensions are provided per the approved plans. cc: NCDENR-DEMLR Washington Regional Office Beaufort County Building Inspections Page 7 of 7 S LENILR USE ONLY ate Rece` ved Pee Paid Permit Number 13 21ii.i 4 ' 75- � �W-V� 15 019D O Applicable Rules: ❑ Coastal SW — 1995 ❑ Coastal S — 2008 ❑ Ph 11 - Post Construction (select all HNISPOE ,ddNb n-Coastal SW- I-IQW/ORW Waters El Universal Stormwater Management Plan Other WQ M mt Plan: State of North Carolina Department of Environment and Natural Resources Division of Energy, Mineral and Land Resources STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. ['reject Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): River Run Apartments 2. Location of Project (street address): City: Chocowinity County: Beaufort Zip: 27817 3. Directions to project (from nearest major intersection): Site is located 400 feet SE from intersection of Winfield Street and US Hwy 17 4. Latitude:35' 30' 56" N Longitude:77* 5' 41" W of the main entrance to the project. it. PERMIT INFORMATION: 1. a. Specify whether project is (check one): ®New ❑Modification ❑ Renewal w/ Modification, lReruaaals with modifications also requires SWU-102 — Reneroal 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 DEMLR 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 stale permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): i ❑LAMA Major ®Sedimentation/Erosion Contrgl`:5.55 ac o 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: 5. Is the project located within 5 miles of a public airport? ®No ❑Ye If yes, sce S.L. 2012-200, Part Vl: htt portal.ncdent-mi '/web/Ir/rules-and-regulations Form SWU-101 Version Ocl. 31, 2013 Page I of 6 III. CONTACT INFORMATION I . 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:River Run Apartments, LLC Signing Official & Title Fred C. Mills, Sr., Manager b.Conlacl information for person listed in item la above: Street Add City: Mailing Address (if applicable):PO Box 6171 State: Cily:Ralei€h StateNC Zip:27628 Phone: (919 ) 755-9155 Fax: (919 ) 882-8500 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:Friedman/Ravenwood, LLC Signing Official & Title:Stanley Friedman, Manager b.Contact information for person listed in item 2a above: Street Address:401 Moss Way Cily:Washington StateNC Zip:27889 Mailing Address (ifnpplicable):PO Box 1845 City:Washington Phone: (919 ) 654-1605 StateNC Zip:27889 Fax: (919 ) 645-1606 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:Mark Morgan Signing Official & Title b.Conlact information for person listed in item 3a above: Mailing Address:PO Box 6171 City:Raleigh Phone: (336 ) 689-0447 StateNC Zip:27628 Fax: ( ) Gmail:nutrkCmcnuiinc com Form SWU-101 Version Oct. 31. 2013 Page 2 of 7 4. Local jurisdiction for building permits: Point of Conlact:Kevin Brickhouse IV. PROJECT INFORMATION Phone #: (252 ) 945-7977 1. In the space provided below, briefly summarize how the stonnwaler runoff will be treated. Slormwaler will be treated in a Wet Detention Pond 2. a. If claiming vested rights, identify the supporting documents provided and the dale they were approved: ❑ Approval of a Site Specific Development Plan or PUD Approval Date: ❑ Valid Building Permit Issued Date: ❑ Other: Dale: 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. Slormwaler runoff from this project drains to the Tar -Pamlico River basin. 4. Total Property Area: 6.138 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': 6.138 acres Total project area shall be calculated to exclude the following: the normal pool of impounded structures, the area behveen the banks of streams and rivers, the area below the }Jornml High Water (NHW) line or Mean High Water (MHW) line, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area is used to calculate overall percent built upon area (BLIA). Non -coastal Wetlands landward of the NHW (or MHW) line may be included in the total project area. 8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 37.1 % 9. Flow many drainage areas does the project have?7 (For high density, count 1 for each propose 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. a� Pone S%VIJ-101 Version Oct. 31, 2013 ['age 3 47 Basin Information Drainage Area 'I Drainage Area _ Drainage Area Drainage Area Receiving Stream Name Crawford Cr Stream Class * SC; NSW Stream Index Number * 29-6-2 Total Drainage Area (sf) 198634 56 On -site Drainage Area (sf) 198634 Off -site Drainage Area (so 0 Proposed Impervious Area** (sf) 99317 2 .SS '% Impervious Area*" (total) 50 Impervious** Surface Area Drainage Area I Drainage Area Drainage Area Drainage Area On -site Buildings/Lots (so 36422 On -site Streets (sf) On -site Parking (sf) 49629 On -site Sidewalks (sf) 13266 Other on -site (so 0 Future (so 0 Off -site (sf) Existing BUA*** (so Total (sf): 99317 Stream Class and Index Number can be determined at: htt)::::[portal.nedetir.or web zoq/ps/esu/classi ications 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 arnount of existing 8UA that will remain after development. Do not report any existing BUA that is to be removed and Which will be replaced by new BUA. 11. How was the off -site impervious area listed above determined? Provide documentation. No offsite drainage Projects in Union County: Contact DEMLR Central Office staff to check if the project is located within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater requirements as per 15A NCAC 02B .0600. V. SUPPLEMENT AND O&M FORMS The applicable state slormwater 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 httpL�[portal.ncdenr.org/web/wg/ws/su/bap-manual. VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and Land Resources (DEMLR). A complete package includes all of the items listed below. A detailed application instruction sheet and BMP checklists are available from littp:ZZportai.ncdenr.orgZweb/wq/ws/sLI/st,iteswZfornis—docs. The complete application package should be submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the interactive online map at littp:Zlpoi-tal.iicdenr.org/iveb/wq/WS/`SLI/inaps.) 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 help://portal.ncdenr.org/web/wq/ws/su/statesw/forms does. Initials V 'I. 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 W Form. (if required as per Part VII below) 3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M agreement(s) for each BMP. �/��7✓ 4. Permit application processing fee of $505 payable to NCDIiNR. (For an Express review, refer to htlp://www.envhclgf pcs onestopress.hUnl 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.) Form SWU-101 Version Oct. 31. 2013 1'ase 4 of 7 ✓/`5. A detailed narrative (one to two pages) describing the stormwater treatment/management for t/ 6. A USCS map identifying the site location. If the receiving stream is reported as class SA or the �w / receiving stream drains to class SA waters within Ih mile of the site boundary, include the'h mile radius on the map. ✓�7. Sealed, signed and dated calculations (one copy). pw 8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including: _1_ ,/ � i. Development/Project name. b. Engineer and firm. ✓/ V c. Location map with named streets and NCSR numbers. d. Legend. V/// e. North arrow. � /g. f. Scale. 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 MFIW or NFIW line of tidal waters, and any coastal wellands landward of the MHW or NFIW lines. • Delineate the vegetated buffer landward from the normal pool elevation of impounded structures, the banks of streams or rivers, and the MHW (or NFIW) of tidal waters. j i. Dimensioned properly/project boundary with bearings & distances. 1. 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). 9. Copy of any applicable soils report with the associated SH WT 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"x1l" 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 DEMLR to verify the SHWT prior to submittal, (910) 796-7378.) v� 10. A copy of the most current property deed. Deed book: 1539 Page No: 001 �w ` -11. For corporations and limited liability corporations (LLC): Provide documentation from the NC 4111 Secretary of Stale 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 LLC must be listed as an active corporation in good standing with the NC Secretary of State, otherwise the application will be returned. http:/ /wwwsecretary.stale.nc.us/Corpora lions/ CSearch.aspxx VI1. 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 htti2://portii.ncdenr.org/web/Ir/state- stormwater-forms does. Download the latest versions for each submittal. In the instances where the applicant is different than the properly owner, it is the responsibility of the properly 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 DEMLR, and that they will be recorded prior to the sale of any lot. Form SU'U-lot Version Oct. 31, 2013 Pauc 5 of 7 V III. 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.Homer S. Wade, PE Consulting Firm: Borum, Wade, and Associates Mailing Address:621 Eugene Court, Suite 100 City:Greensboro Siate:NC Zip; 27401 Phone: (336 1275-0471,ext118 Fax: (336 1 275-3719 Email: m wi Iliams®borum-wade.com IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this section) 5�{a�\c "v%^"" o^ I, (print or h/pe name of person listed in Contact Information, item 2a) biiehft , 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 1a) Fred G. Mills, Sr. with (print or type name of organization listed in Contact Information, item 1a) ,R1VER RuN 4PART4I6&&kto 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 DEMLR Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DEMLR 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 _ actioniiicludin th essment of ::,:vil enalties of up to $25,000 per day, pursuant to NCGS 143-215.6. Signa e: Date: �2 3 13 I, 5fA Va 4 . t1. Vim; Ca^ o;r,A-S a Notary Public for the State of N or+h CAYo I � nniCounty of do hereby certify that r'r % eol- m a n personally appeared before me thisp�ay of �2c4 r n be r . aO I " and acknowledge the due execution of the application for a stormwater permit. Witness my hand and official seal, (�-5n. Aa 1C. �, i fn CAA 00 SEAL My commission expires Y— l a- I S X. APPLICANT'S CERTIFICATION 1, (print or type mine of person listed to Contact Information, item Ia) Fred G. Mills Sr 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 therequired deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of the applicable stormwater rules under 15A NCAC 21-I .1000 and any other applicable state stormwater requirements. Signature: 1Daate: 1.1- S - -fib ) 73 I, '�bs�[ %/G✓anti , a Notary Public for tth/e State of /" C County of (wu do hereby certify that personally appeared fl n before me this S day of and ackno%}filedgge the due exec on o the application for a stormwater permit. Witness my hand and official seal, /z JOSEPH R. WARENDA NOTARY PUBLIC Wake County, North Carolina iNy Commission Expires 4I18J2018 Form SWU-101 Version Oct. 31, 2013 SEAL My commission expires -2- 0 % a Page 6 of 6 J,-*yyq .51 jqqarOL A TtOic?,mmn'� �M Permit No. no be proNtletl6y OWO) W A TFgOG y r WDENR 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. G'. P,ROJECTdNFORMATION /t Project name RIVER RUN Contact person MATT WILLIAMS Phone number 336-275-0471 Date 1112212013 Drainage area number 1 II. DESIGN INFORMATION Site Characteristics Drainage area 198,634 ft' Impervious area, post -development 99,317 1t' %impervious 50.00 Design rainfall depth 1.5 in Storage Volume: Non -SA Waters Minimum volume required It, Volume provided It Storage Volume: SA Waters 1.5' mnoff volume 12,415 ft' Pre -development 1-yr, 24-hr mnoff 7 rya Post -development 1-yr, 24-hr mnoff 3 ft' Minimum volume required 12,415 ft' Volume provided 13,033 h' Peak Flow Calculations Is the prelpost control of the lyr 24hrstorm peak Dow required? Y (Y or N) 1-yr, 24-hr rainfall depth 3.2 in Rational C, pre -development 82.00 (unifless) Rational C, post -development 88.50 (unidess) Rainfall intensity: 1-yr, 24-hr storm 3.20 inthr OK Pre -development 1-yr, 24-hr peak flow 7.00 ft'/sec Post -development 1-yr, 24-hr peak now 3.00 ft'/sec Pre/Post 1-yr, 24-hr peak Dow control -4.00 ft'/sec Elevations Temporary pool elevation 26.00 fmsl Permanent pool elevation 25.00 fmsl SHWT elevation (approx. at the perm. pool elevation) 25.40 fmsl Top of 10ft vegetated shelf elevation 25.50 fmsl Bottom of 1 Oft vegetated shelf elevation 24.50 fmsl Sediment cleanout, top elevation (bottom of pond) 20.50 fmsl Sediment cleanout, bottom elevation 19.00 fmsl Sediment storage provided 1.50 It Is them additional volume stored above the state -required temp. pool? N (Y or N) Elevation of the top of the additional volume fmsl Form SW401-Wet Detention Basin-Re¢94118112 Parts I. a 11. Design Summary, Page 1 of 2 �, - Permit No. i (to be povded by DWQ) IL DESIGN.INF,ORMATION- Surface Areas Area, temporary pool Area REQUIRED, permanent pool SAIDA ratto Area PROVIDED, permanent pool, Area, bottom of 1Oft vegetated shelf, &,,set Area, sediment cleanout, top elevation (bottom of pond), 4, cud Volumes Volume, temporary pool Volume, permanent pool, dam Volume, forebay (sum of forebays if more than one forebay) Forebay %of permanent pool volume SAIDA Table Data Design TSS removal Coastal SAIDA Table Used? Mountain/Piedmont SAIDA Table Used? SAIDA rate Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) Volume, permanent pool, �— c- Area provided, permanent pool, Am„� Average depth calculated Average depth used in SAIDA, ¢., (Round to nearest 0.5ft) Calculation option 2 used? (See Figure 10-2b) Area provided, permanent pool, J,,,,, Area, bottom of 10ff vegetated shelf, k ,hen 14,198 ft? 9,932 flz 5.00 limitless) 11,983 ft` OK 9,571 to 4,423 fle 13,033 tt' 36,866 113 12,147 ft' 32.9% % 90 % Y (Y or N) N (Y or N) 5.00 (unitless) N (Y or N) 36,866 ft' 11,983 It` ft Y (Y or N) 11,983 W 9,571 fl` Na Insufficient forebay volume. Need 3 It min. Area, sediment cleanout, top elevation (bottom of pond), &t wed 4,423 fe "Depth' (distance b/w bottom of 10ft shelf and top of sediment) 4.00 It Average depth calculated 3.74 it OK Average depth used in SAIDA, ¢., (Round to down to nearest 0.511) 3.5 it OK Drawdom Calculations Drawdown through onfice? Y (Y or N) Diameter of orifice (if circular) 2.00 in Area of odfce (if -non -circular) in' Coefficient of discharge (Co) 0.60 (unitless) Driving head (Ft) 1.00 It Drawdown through weir? (Y or N) Weir type (unitess) Coefficient of discharge (Cr) (unitess) Length of weir (L) It Driving head (H) ft Pre -development 1-yr, 24-hr peak Flow 7.00 fl3/sec Post -development 1-yr, 24-hr peak Flow 3.00 ft'/sec Storage volume discharge rate (through discharge orifice or weir) 0.10 ft/sec Storage volume drawdown Ome 2.90 days OK, draws down in 2-5 days. Additional Information Vegetated side slopes 3 :1 OK Vegetated shelf slope 10 :1 OK Vegetated shelf width 10.0 It OK Length of flowpath to width ratio 3 :1 OK Length to width ratio 1.5 :1 OK Trash rack for overflow & orifice? Y (Y or N) OK Freeboard provided 1.0 It OK Vegetated filter provided? N (Y or N) OK Recorded drainage easement provided? Y (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Drain mechanism for maintenance or emergencies is: e� lZ-(mil-3 Form SW401-Wet Detention Basin-Rev.9.4118/12 Parts I. & II. Design Summary, Page 2 of 2 l` 1- do, EXPREEXPRESS Permit Number: S W V l3l ZoG SS (to he prorided by UIVQ) DEC 13 2013 Drainage Area Number: Wet Detention Basin Operation and Maintenance Agreement NC ®ERR 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 Ions. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4 Permit Number: (to be provided by DIVA) Drainage Area Number: BMP element: Potentialproblem: How 1 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 spraying. 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 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. 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 50% of the area. Consult a professional to remove 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 DB'Q) Drainage Area Number: BMP element: Potentialproblem: How I 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 is damaged 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 4 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 4 feet in the forebay, the sediment shall be removed. Sediment Removal Bottom BASIN DIAGRAM (fill in the blanks) 20.5 Pe manen' ------------------ Volume 19 ft Min. Sediment Storage FOREBAY Permanent Pool Elevation 25 Sediment Removal Elevation 20.5 Volume Bottom Elevation 19.5 1 I -It MAIN POND Storage Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4 Permit Number: (to be provided b), DIVQ) acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:River Run Apartments BMP drainage area number: Wet Detention Pond #1 Print name: Address: Phone:919-755-9155 Signature: Date: l.'a--.z-a013 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, J05 el%1 L O2. 2✓a/c a Notary Public for the State of —.A/C_ County of %lc �� do hereby certify that i �,L ✓� t ��j �,�. personally appeared before me this day of Der , _0I3 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, JOSEPH R. WARENDA NOTARY PUBLIC Wake County, North Carolina MY Commission Expires 4/1812018 SEAL My commission expires Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 WET DETENTION POND ANALYSIS -ALL RULES FILENAME: S:IWQSISTORMWATER\EXCELSPREADSHEETSIPOND1131206 PROJECT#:SW7 REVIEWER: _ Initial Run Date;71�7 _ PROJECT NAME: ;River Run Apartments _ _ Last modified 19-Dec-13 Receiving Stream: icrawford Creek Class: Drainage Basin: ,Tar-Pam _ ��CSC+' —NSW Within 112 mile L_JY or N S Index No. ;29.6-2 ODrainage Area Rules- "2008" or "Ph2" feet DA Area 4.56 acres Buildings 36422.00 square feet 1 user input rec Street 49629.00 square feet 0.98 formula SW 13266.00:square feet 0.95 Future squarefeet - Offsite square feet 77 Other 'square feet BUA at diff. DS® square feet TOTAL 99317.00 square feet SURFACE AREA CALCULATION (with added DA and BUA at different design stone) Overall % Impervious L 50.00010 SA/DA Ratio 5.00°/s Average Design Depth 3.5 feet Req. SA 9932 sf TSS, 85 or 90: 90 % Prov. SA 11983 sf Drainage AreaG BUA Post development Rv= Old BUA Design Storm Old BUA Design Volume 1.5" New BUA Design Storm Volume 1 yr. 24 hour preciphadon depth (inches) Predevelopment Rv value 1 yr. 24 hr. Pre -development volume 1 yr. 24 hr. Post -development volume 2008 Design Volume 12415 cubic feet Phase 2 Design Volume 12415 cubic feet Average Head Flow Q2, cfs Flow 05, ds No. of Orifices Diameter, inches Drawdown = 1 yr 24 hr intensity, in/hr Runoff Coefficient 1 yr 24 hr peak Q Orifice flow<1yr24hr 7 sf sf unitless inches from NOAA chart Use 0.05 it no existing BUA cubic feet cubic feet 02 Area 4 3.89 sq. inches Q5 Area 1.55 sq. inches Orifice Area 3.14 1sq. inches or weir H x W in x lays V of end contractions, N = JOAA chart ® discharge coefficient, C hitless Effective weir length, L = in