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HomeMy WebLinkAboutSW7080809_CURRENT PERMIT_20130724STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW 7&9P f DOC TYPE CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATES YYYYMMDD i NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Pat McCrory Thomas A. Reeder John E. Skvarla, III Governor Acting Director Secretary Mr. Bobby Outten, County Manager July 24, 2013 Dare County PO Box 1000 Manteo, NC 27954 Subject: Stormwater Permit No. SW7080819MOD2 College of the Albemarle New Professional Arts Building & Parking Lot Expansion High Density Project Dear Mr. Outten: Dare County The Washington Regional Office received a complete Stormwater Management Permit Application for the modification of the College of the Albemarle New Professional Arts Building & Parking Lot Expansion project on June 14, 2009. This modification includes the expansion and paving of an existing gravel parking lot and the addition of a new sidewalk on the property. The existing permitted constructed wetland design is sufficient to handle this additional impervious area runoff. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7080819MOD2 dated July 24, 2013, for the continued construction of the subject project located at 205 S. US Hwy 64/264 in Manteo, North Carolina. This permit shall be effective from the date of issuance until July 27, 2019, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to'the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Scott Vinson at (252) 946-6481. Sincerely, f'Y Thon A. Reeder for AA/sv: S:\WQS\STORMWATER\PERMIT\SW7080819MOD2 cc: Michael Morway, PE —Albemarle & Associates. Dare County Planning/Building Inspections ,/'Washington Regional Office North Carolina Division of Water Quality - 943 Washington Square Mall One Washington, North Carolina 27889 NorthCarolina Phone: 252 946-64811 FAX: 252-946-9215 i��n F�yay/l� Internetw .ncwateroualiN.ora (/ a L[d` An Equal Opportunity \ Affirmative Action Employer r State Stormwater Management Systems Permit No. SW7080819MOD2 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 Dare County College of the Albemarle New Professional Arts Building Dare County FOR THE construction, operation and maintenance of a constructed wetland stormwater treatment system in compliance with the provisions of 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 July 27, 2019, 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 1.6 of this permit. The stormwater control has been designed to handle the runoff from 72,359 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 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. Page 2 of 7 State Stormwater Management Systems Permit No. SW7080819MOD2 c 6. The following design criteria have been provided in the constructed wetlands and must be maintained at -design condition: a. Drainage Area, acres: b. Total Impervious Surfaces, ftz: C. Design Storm, inches: d. TSS removal efficiency: e. Permanent Pool Elevation, FMSL: f. Permanent Pool Surface Area, ft2: g. Proposed Storage Volume, ft3: h. Required Storage Volume, ft3: i. Temporary Storage Elevation, FMSL j. Controlling Orifice: k. Receiving Stream/River Basin: I. Stream Index Number: M. Classification of Water Body: II. SCHEDULE OF COMPLIANCE 2.47 (107,593sf) 72,359 1.0 85% 1.20 5,884 5,884. 5,884 2.20 1.0" O pipe Shallowbag Bay / Pasquotank 30-21 —3 "SC" 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 times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowin.9 and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris.removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the outlet structure must be available at all times. Page 3 of 7 • State Stormwater Management Systems Permit No. SW7080819MOD2 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 7. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 9. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 11. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 12. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. Page 4 of 7 State Stormwater Management Systems • Permit No. SW7080819MOD2 Ill. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility., 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. 10. This permit shall be effective from the date of issuance until July 27, 2019. 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 241h day of June, 2013. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Division of W er Quality By Authority of the Environmental Management Commission Permit No. SW7080819 MOD2 Page 5 of 7 State Stormwater Management Systems Permit No. SW7080819MOD2 College of the Albemarle New Professional Arts Building — Former Manteo Middle School Stormwater Permit No. SW7080819 MOD2 Dare 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. SW7080819MOD2 l College of the Albemarle New Professional Arts Building Stormwater Permit No. SW7080819MOD2 Dare County 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 Regional Office Dare County Planning Page 7 of 7 I emarl & ASSOCIATES, LTD. December 21. 2009 NCDENR Division of Water Quality 943 Washington Square Mall Washington, NC 27889 ATTN: Mr. Scott Vinson RE: College of the Albemarle — New Professional Arts Building High Density Stormwater Management Permit #SW7080819MOD Engineer's Certification Dear Scott: Please find the enclosed Engineer's Certification for the College of the Albemarle in Manteo. As built survey has verified the wetland grading is in very close conformance to the approved design and existing water levels are as expected. If you have any further questions regarding any portion of this submittal, please do not hesitate to call me. Project Eligiaeer� cc: Robert Outten, Dare County Manager 2 7009 Steve Wilt, MBAJ Architecture File 6866C3 (350) Engineering — Surveying — Land Planning P.O. Box 3989, 115 W. Saint Clair SL, Kill Devil Hills, NC 27948 Telephone: 252-441-2113 Fax: 252-441-0965 State Stormwater Management Systems Permit No. SW7080819MOD College of the Albemarle New Professional Arts Building — Former Manteo Middle School Stormwater Permit No. SV 7080819MOD Dare County Designer's Certification I, MICHAEL 3 . moat jmy , as a duly registered E �� in the State of North Carolina, having been authorized to observe pe(odical) weekly/ full time) the construction of the project, COu-P e aF TNc A��- fa-FEss,-r + A2-r3 &-so,,c (Project) for Daa.E Cory _(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: ff pC- Mee. > AQD.�,->D wET�w+� wN-s ftvos--o Ta Ig -ro sk% oO� r-olrL moarc VIM(NNcIov5 s?ecteS ) To ew- -N CUv,ElL CO-. fo'�CE —'TrA ezx-e-tLy e-Evl5E0 601DCUOR-S e Signe Regi Date SEAL DEC 22?oos Page 6 of 7 State Stormwater Management Systems Permit No. SV 7080819MOD College of the Albemarle New Professional Arts Building Stormwater Permit No. SW7080819MOD Dare County 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. t✓11. The permitted amounts of surface area and/or volume have been provided. ✓1✓2. Required drawdown devices are correctly sized per the approved plans. ✓ 13. All required design depths are provided. e/ 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 Regional Office Dare County Building Inspections Page 7 of 7 DEMLR USE ONLY Dale Received Fee Paid Permit Number -T I J.o o Sti/ u STORMWATER PERMITTING FORM 7: 4 MINOR MODIFICATION Standard Permitting Program — No Fee for Minor Modification Express Permitting Program — See Express Fee Schedule Only complete applications packages will be accepted and reviewed. This form and the required items (with original signatures) must be sent to the appropriate DEMLR Regional Office, which can be determined by locating the project on the interactive online map at: http://deg.nc.govlcontactlregional-offices. This form is to only to be used by the current permittee to notify the Division of a minor modification. Pursuant to Rule 15A NCAC 02H .1002, a minor modification is a change to the project that: 1) does not increase the net built -upon area; and/or 2) does not change the size or design of the SCM(s). A. GENERAL INFORMATION IRKEIVED SEP 0 9 .1-16 1. State Stormwater Permit Number: SW7080819MOD2 2. Current Permit Holder's Company Name/Organization: Dare County 3. Signing Official's Name: Robert L. Outten 4. Signing Official's Title: County Manager 5. Mailing Address: P. O. Box 1000 City: Manteo State: NC ZIP: 27954 6. Street Address (if different): 94 Marshall C. Collins Drive, Room 286 City: Manteo State: NC ZIP: 27954 7. Phone: (252) 475-5800 Email: outten(cDdarenc.com 8. Describe the minor modifications that you are requesting, including any revised BUA allocations (attach additional pages or supporting tables similar to Section IV.10 of the original application, if needed): The parking in front of the building is being removed and converted to pedestrian space, a new access drive is being constructed to the north of the building and some of the replacement parking will be constructed south of the building as part of an overall proiect to demolish and replace old buildings on site with one new building. Area calculated by topo visual inspection and design indicates a reduction in overall drainage area from 107,593 sf to 103 175 sf and a reduction in coverage from 72,359 sf to 54,190 sf. B. SUBMITTAL REQUIREMENTS Please mark "Y' to confirm the items are included with this form. Please mark "X" if previously provided. If not applicable or not available, please mark N/A.: Y 1. Two hard copies (with original signatures) and one electronic copy of this,completed form. Y** 2. Two hard copies and one electronic copy of the revised plan sheets (must be a revision of the originally approved plan sheets). N/A 3. If there is reallocation of lot BUA, a copy of the revised recorded deed restrictions and protective covenants OR the proposed recorded deed restrictions and protective covenants documenting the changes and a signed agreement to provide the final recorded document. N/A 4. If applicable, the appropriate Express review fee. **Please note that original plans were by others. See drainage analysis for exhibits illustrating current and proposed conditions related to the permit modification. Stormwater Permit Form 7: Minor Modification Page 1 of 2 '\ . L I,b July 14. 2017 C. CONTACT INFORMATION 1. The Design Professional who is authorized to provide information on the Applicant's behalf: Design Professional's Name: Kimberly D. Hamby PE Consulting Firm: Timmons Group Mailing Address:1508 West City Drive Unit E City: Elizabeth City State: NC Zip: 27909 Phone: (252) 621-5029 Fax: Email: kim.hamby(u),timmons.com 2. [OPTIONAL] If you would like to designate another person to answer questions about the project: Name & Title Organization: Mailing Addre City: Phone: L Email: D. CERTIFICATION OF PERMITTEE in Section A and complete to the I Signature: the current permittee, certify that I have authorized the minor modifications listed in the attached revised plan sheets. I further attest that this information is accurate and ny knowledge. 4 ►1GrV' �Qr eya t N1%bM a Notary Public for the State of Yl Y� �o roli 1gq County of��e- , do hereby certify that �lrc4r- L. OtckkeK personally appeared before me this the 9L5*k • day of 20 A0 and acknowledge the due execution of the forgoing instrument. Witness m hand and official seal, (Notary Seal) Notary Signature My commission expires CHERYL CARNEVALE ANSY NOTARY PUBLIC DARE COUNTY NORTH CAROLINA W COMMISSION EXPIRES 8R =11 Stormwater Permit Form 7: Minor Modification Page 2 of 2 Oct 6, 2017 S'A l / - DWQ USE ONLY ' Date Received Fee Paid Permit Number 5 ApplicableRules:' ❑ Coastal SW -1995 it❑ Coastal SW - 2008 ❑ Ph II - Post Construction (select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ M mt Plan: 3n State of North Carolina Department of Environment and Natural Resource "?+ r= Division of Water Quality .MC I V E STORMWATER MANAGEMENT PERMIT APPLICATION FOIUN 14 2013 This form rimy be photocopied for use as an original I. GENERAL INFORMATION �p ({ pQ n F��® 1. Project Name (subdivision, facility, or establishment name -should be consistent with pr Je a ;S/ plans, specifications, letters, operation and maintenance agreements, etc.): College of the Albemarle New Professional Arts Building - Parking Lot Exnansion 2. Location of Project (street address): 205 Hwy 64 South Business City:Manteo County:Dare Zip:27948 3. Directions to project (from nearest major intersection): Travel east along Hwy-64 into Dare County. After you cross the Virginia Dare Bridge ou approach the signalized intersection of Hwy 64 & Hwy 264 (64 Business). Turn left onteo Hwy 62 Business and travel just over 1 mile. The College of the Albemarle will be directly on your right. 4. Latitude:35° 54' 10" N Longitude:75° 40' 18" W of the main entrance to the project. II. PERMIT INFORMATION: 1. a. Specify whether project is (check one): ❑New ®Modification ❑ Renewal w/ Modificationt tRenev,als With modifications also requires SWLI-102 - ReneWal Applicalioa Forin b.If this application is being submitted as the result of a modification to an existing permit, list the existing permit numberSW7080819MOD , its issue date (if known)luly 27, 2009 and the status of construction: El 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 ❑NPDES Industrial Stormwater ❑Sedimentation/Erosion Control: 0_9 ac of Disturbed Area ❑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:n/a 5. Is the project located within 5 miles of a public airport? ❑No ®Yes If yes, see S.L. 2012-200, Part Vl: littp://portal.iicdenr.org/web/wq/ws/su/statesw/rules laws Form SWU-101 Version 06Aug2012 Page I of III. CONTACT INFORMATION 1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee, designated government official, individual, etc. who owns the 12ro4ect): Applicant/ Organ ization:Dare County Signing Official & Title:Bobby Outten, County Manager, Dare County b.Contact information for person listed in item la above: Street Address:954 Marshall C. Collins Dr City:Manteo State:NC Zip:27954 Mailing Address (if applicable):PO Box 1000 City:Manteo State:NC Zip:27954 Phone: (252 ) 475-5800 Fax: (252 ) 473-1817 Email:outteii@darenc.com 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: Signing Official & Title: b.Contact information for person listed in item 2a above: Street Address: City: State: Zip: Mailing Address (if applicable): City: State: Phone: ( ) Fax: Email: 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 Signing Official & b.Contact information for person listed in item 3a above: Mailing Address: Phone: 4. Local jurisdiction for building permits: State: Zip: Fax: ( Point of Contact:Erin Burke Phone #: (252 ) 473-2133 Form SWU-101 Version 06Aug2012 Page 2 of 7 4.• Local jurisdiction for building permits: Town of Manteo Point of ContactErin Burke IV. PROJECT INFORMATION Phone #: (252 ) 473-2133 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. Stormwater from an area larger than the net increase in site coverage will be directed into a previously permitted and constructed created wetland that contains additional capacity. 2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved: ❑ Approval of a Site Specific Development Plan or PUD Approval Date: ❑ Valid Building Permit Issued Date: ❑ Other: Date: b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with: ❑ Coastal SW -1995 ❑ Ph II - Post Construction 3. Stormwater runoff from this project drains to the Pasquotank River basin. 4. Total Property Area: 15.4 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':15.4. acres Total project area shall be calculated to exclude the following the normal pool of un ounded structures, the area between the banks of streams and rivers, the area below the Nonnal High Water (Nm line or Mean High Water (MHW) line, and coastal wetlands landward from the NHW (or MHIN) line. The resultant project area is used to calculate overall percent built upon area (BUA). 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 = 36.8 % 9. How many drainage areas does the project have?l (For high density, count 1 for each proposed engineered stonnwater 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. Form SWU-101 Version 06Aug2012 Page 3 of 7 Basin Information Draina e Area 1 Draina e Area _ Draina e Area Drainage Area Receiving Stream Name Shallowbag Bay _ _ Stream Class * SC Stream Index Number * 30-21-3 Total Drainage Area (so 107,593 On -site Drainage Area (so 107,593 OffsiteDrainage Area (so 0 Pro osed Impervious Area (so 72,359 Impervious Area*` total 67.3% Im ervious" Surface Area Draina e Area 1 Draina e Area _ Draina e Area Drainage Area On -site Buildings/Lots (so _ _ On -site Streets (so On -site Parking (so 10,258 On -site Sidewalks (so 760 Other on -site (so Future (so 15,150 Off -site (so 3,385 Existing BUA*** (so 42,806 Total (so: 72,359 ` Stream Class and Index Number can be determined at: Itttp://portal.ncdennor ag_ebfwq/ps/csu/classifications ** Impqervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidavalks, 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 removed and which will be replaced by new BUA. 11. How was the off -site impervious area listed above determined? Provide documentation. Proieets in Union County: Contact DWQ Central Office staJJio check if the project is located within a Threatened & Endangered Species watershed that may be subject to more stringent smrmwater requirements as per 15A 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 from http://portal.ncdenr.org/web/wq/ws/su/bmP-manual. VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. A detailed application instruction sheet and BMP checklists are available from http://12ortal.ncdenr.oriz/web/wq/ws/su/statesw/forms does. The complete application package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating project on the interactive online map at http://portal.ncdenr.org/web/wq/ws/su/maps.) 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://portal.ncdenr.org/web/wq/ws/su/statesw/forms dots. 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 VII below) 3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M agreement(s) for each BMP. 4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to htt :/ /www.envhelp.org/ Pages/ onestoRexpresshhn 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 06Aug2012 Page 4 of 7 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 1/2 mile of the site boundary, include the mile radius on the map. /z P�� �vp ,, koe�:) 7. Sealed, signed and dated calculations (one copy). AS 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). 9. Copy of any applicable soils report with the associated SHWT elevations (Please identifyS elevations in addition to depths) as well as a map of the boring locations with the existing 1 u9 elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the erso `mot 7 project area clearly delineated. For projects with infiltration BMPs, the report should also include the soil type, expected infiltration rate, and the method of determining the infiltration rate. (Infiltration Devices submitted to WiRO: Schedule a site visit for DWQ to verify the SHWT prior to submittal, (910) 796-7378.) Pew. y7 10. A copy of the most current property deed. Deed book: Page No: 0 Z 6% ,V 11. For corporations and limited liability corporations (LLC): Provide documentation from the NC t Secretary of State or other official documentation, which supports the titles and positions held by the persons listed in Contact Information, item la, 2a, and/or 3a per 15A NCAC 2H:1003(e). The corporation or LLC must be listed as an active corporation in good standing with the NC Secretary of State, otherwise the application will be returned. httE!://www.secretary.state.nc.us/CorDorations/CSearch.aspx VII. 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 http://portal.ncdenr org/web/wg/ws/su/statesw/forms does. Download the latest versions for each submittal. In the instances where the applicant is different than the property owner, it is the responsibility of the property owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring that the deed restrictions are recorded. By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and protective covenants for this project, if required, shall include all the items required in the permit and listed on the forms available on the website, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the NC DWQ and that they will be recorded prior to the sale of any lot. Form SWU-101 Version 06Aug2012 Page 5 of 7 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:Michael 1. Morway, PE Consulting Firm: Albemarle & Associates Ltd. Mailing Address:115 West St. Clair Street City:Kill Devil HIlls Phone: (252 ) 441-2113 Email:mikem@albemarleassociates.com State:NC Zip:27948 Fax: (252 ) 441-0965 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 Infonnation, item 2a) 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) with (print or type name of organization listed in Contact Information, item 1a) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal, which indicates the party responsible for the operation and maintenance of the stormwater system. As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DWQ immediately and submit a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6. a Notary Public for the State of . do hereby certify that before me this _ day of Date: County of personally appeared and acknowledge the due execution of the application for a stormwater permit. Witness my hand and official seal, SEAL My commission Form SWU-101 Version 06Aug2012 Page 6 of 7 IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this section) 1, (print or type name of person listed in Contact Information, item 2a) certify that I own the property identified in this permit application, and thus give permission to (print or hype mane of person listed in Contact Information, item 1a) with (print or type name of organization listed in Contact Information, item 1a) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal, which indicates the party responsible for the operation and maintenance of the stormwater system. As the legal property owner 1 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. 1 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 o cement action including the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 3- 6. Signature: Date: vri I, me e E (Ui I GmS a Notary Public for the State of 40h t /rl-nbn - , Countyof a) Owe, do hereby certify that �6)&'personally appeared before me this L,2"'day of J0/1 , and acknowledge the due, execution of the application for a stormwater permit. Witness my hand and official seal, � �Ud�QGQ r� „ waaaoa U 1 a�`_� mac. 6'✓€i ; ®o., \OTA.9 AV B LAG,,} pav'�OBg '.•� Co. ui 61W.'" My commission expires P-g2 7- /3 Form SWU-101 Version 06Aug2012 Page 6 of 7 Permit Number (to be provided by DWQ) ®� 2pF W A7F9O O\G NC ENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WETLAND SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part lll) must be printed, filled out and submitted along with all the required information. Project name Contact name Phone number Date Drainage area number New Michael Morway, PE 252-441-2113 8/18/2008 (modifed 2/2013) 1 - Former Manteo II. DESIGN INFORMATION Site Characteristics Drainage area 107,593.00 ftZ Impervious area 72,359.00 ft Percent impervious 67.3% % Design rainfall depth 1.00 inch Peak Flow Calculations t, q 6 tr�^Z E'I=— I V E 1-yr, 24-hr runoff depth 3.42 in 1 -yr, 24-hr intensity 0.14 in/hr Pre -development 1-yr, 24-hr runoff 0.07 ft3/sec SUN 1 4 2013 Post -development 1-yr, 24-hr runoff 0.02 ft3/sec Pre/Post I 0.06 ft3/sec ��f1 D �WAR0 StorageV lume:hrpeakeWat Storage Volume: Non -SR Waters Design volume (temporary pool volume) 5,884.00 ft3 OK Depth of temporary pool/ponding depth (DpL e) 12.00 in OK Drawdown time 4.50 days OK Diameter of orifice 1.00 in OK Coefficient of discharge (Cu) used in orifice diameter calculation 0.60 (unitless) Driving head (Ho) used in the orifice diameter calculation 0.32 ft Provide calculations to support this driving head. Storage Volume: SR Waters Parameters (1?0.EuN00X1 PT_0'*% eb 1-yr, 24-hr depth in J Pre -development 1-yr, 24-hr runoff ft3 Post -development 1-yr, 24-hr runoff ft3 Minimum volume required ft3 Volume provided ff3 Form SW401-Wetland-Rev.2 Parts I and II. Project Design Summary, Page 1 of 3 Permit Number (to be provided by DWQ) Surface Areas of Wetland Zones Surface Area of Entire Weiland Shallow Land The shallow land percentage is: Shallow Water The shallow water percentage is: Deep Pool Forebay portion of deep pool (pretreatment) The forebay surface area percentage is: Non-Forebay portion of deep pool The non-forebay deep pool surface area percentage is: Total of wetland zone areas Add or subtract the following area from the zones Topographic Zone Elevations Temporary Pool Shallow Land (top) Permanent Pool Shallow Water (top) Deep Pool (top) Most shallow point of deep pool's bottom Deepest point of deep pool's bottom Design must meet one of the following two options: This design meets Option #1, Deep pool is 6-inches below SLWT, If yes: SLWT (Seasonally Low Water Table) This design meets Option #2, Has a clay liner If yes: Depth of topsoil above clay liner Topographic Zone Depths Temporary Pool Shallow Land Permanent Pool Shallow Water Deep Pool (shallowest) Deep Pool (deepest) Planting Plan Are cattails included in the planting plan? Number of Plants in planting plan recommended: Herbacious (4inch diameter) Shrubs/small trees (1 gallon or larger) Trees (1.5" dbh) Number of Plants in planting plan provided (several species of each plant type are recommended): Herbacious (4inch diameter) Shrubs/small trees (1 gallon or larger) Trees (2.5" dbh) 5,884.00 flz OK 2,353.00 fe OK 0.40 % 2,471.00 flz OK 0.42 % 710.00 ftZ OK 0.12 % 350.00 ftZ OK 0.06 % 5,884.00 ft2 OK 0.00 ftZ 2.20 fmsl 1.20 fmsl 0.70 fmsl -0.80 fmsl -1.00 fmsl y (Y or N) 0.70 fmsl OK in 12.00 in OK 6.00 in OK 18.00 in OK 20.40 in OK n (Y or N) OK 180 120 30 180 OK 120 OK 22 Higher density is recommended. Form SW401-Wetland-Rev.2 Parts I and II. Project Design Summary, Page 2 of 3 • Permit Number ' (to be provided by DWQ) Additional Information Can the design volume be contained? y (Y or N) OK Does volume in excess of the design volume flow evenly y (Y or N) OK distributed through a vegetated filter? What is the length of the vegetated filter? 30.00 it Are calculations for supporting the design volume provided in the y (Y or N) OK application? Is BMP sized to handle all runoff from ultimate build -out? y (Y or N) OK Is the BMP located in a recorded drainage easement with a n (Y or N) Insufficient ROW location. recorded access easement to a public Right of Way (ROW)? The length to width ratio is: 22.03 :1 OK Approximate wetland length 360.00 ft Approximate wetland width 16.34 it Approximate surface area using length and w dth provided 6,882.40 flz This approx. surface area is within this number of square feet of the entire wetand surface area reported above: Will the wetland be stabilized within 14 days of construction? y (Y or N) OK Form SW401-Welland-Rev.2 Parts I and H. Project Design Summary, Page 3 of 3 205 RECEIVE® leJUN 14 2013 _TD. DWQ_Y/ff0i C] College of the Albemarle Stormwater Management Narrative Parking Lot Improvements Prepared for The College of the Albemarle Highway 64 South Business, Manteo, NC, 27954 Existing Conditions: The College of the Albemarle is located on the 15.42 acre site of the former Manteo Middle School in the Town of Manteo. The site is bordered by US 264, Greenville Street, Salty Dog Lane and Fernando Street. The Natural Resource Conservation Service Soil Survey for Dare County has mapped the soils to consist primarily of Johns Loamy Sand, which includes an infiltration rate ranging between 0.6 — 20 inches per hour within the various layers. The site is relatively level, with elevations ranging from 2 to 6 feet above sea level (NAVD 1988) and the 100 year flood elevation is 8.2. Vegetation on non - improved portions of the site consists mainly of grass with scattered trees (primarily pine). The large portion of the west side of the site drains into drop inlets and is conveyed directly to the US 264 stormwater collection system. Runoff from the majority of the remainder of the site is collected by drop inlets and is conveyed to a stormwater pump station, which pumps the runoff to the marsh across Salty Dog Lane. Ultimately, the entire site drains to Shallowbag Bay. In 2009, the College completed construction of a 22,612 square -foot Professional Arts Building on the east side of the site. Construction included a created wetland designed in accordance with NCDENR standards and permitted by NCDENR under stormwater management permit number SW7080819MOD. The created wetland provided 5,884 cubic feet of treatment volume to accommodate 3,656 cubic feet produced by the construction of the Professional Arts Building and Boat House, as well as available storage volume for future endeavors. After functioning for nearly four years, the vegetation within the wetland is well established and the system appears to be functioning as intended. Proposed Development: An existing compacted gravel parking lot is located along the south side of the site. College of the Albemarle intends to re -grade, expand and pave this parking lot to better accommodate the needs of the school. Work will include the addition of landscaping and modifications to the drainage system. A portion of the proposed parking area is included within the contributing drainage area for the wetland. The remaining area drains toward existing stormwater management systems within the site that do not convey runoff to the created stormwater wetland. The Town of Manteo has also requested a sidewalk extending from the Grenville Street entrance along the south property line to US 64. This College does not have funds to install the sidewalk at this time. However, a location for the sidewalk has been shown on the plans and coverage has been included within the application so that the sidewalk may be installed when funds become available. Land Planning — Engineering — Environmental — Construction Management P.O. Box 3989, 115 W. Saint Clair St., Kill Devil Hills, North Carolina 27948 North Carolina License No. C-1027 Phone: 252-441-2113 w ..AlbemarteAssociates.com Fax: 252-441-0965 I College of the Albemarle Stormwater Management Narrative May 30, 2013 Page 2 of 2 NCDENR Permitting Compliance for Modification: By removing 15,424 sf of gravel pavement and adding 24,647 sf of pavement for the project, plus 3,140 sf for the proposed sidewalk along the Grenville Street perimeter, the project will increase the coverage on the site by 12,363 sf. The drainage patterns established for the new parking lot will reduce "untreated" runoff from the site by directing 10,258 sf of the new pavement to the created wetland. In addition, the system will capture runoff from approximately 3,385 sf of existing asphalt pavement along Uppowoc Street and 760 sf of the proposed sidewalk and direct it to the wetland. The net result is 14,403 sf of additional built upon area being directed into the created wetland for a total of 57,209 sf. This increases the calculated runoff resulting from 1" of rainfall within the contribution drainage area from 3,656 cf to 4,748 cf (1,092 cf increase). In addition, this application is including an additional 15,150 sf of "future" coverage that will bring the total calculated runoff entering the created wetland to the permitted value of 5,884 cf. This is being done to simplify the permit conditions and any future permitting modifications that may be undertaken with a minor modification / plan revision. In the event future improvements are performed, plans will be provided to the Division of Water Quality personnel for concurrence with permit conditions and file update. However, a major permit modification will not be required. A summary of these items is as follows: College of the Albemarle — Professional Arts Building Created Stormwater Wetland Permit Summary SW7080819MOD Parking Lot Expansion "Future' Allocation Total Contributing 2.45 ac 2.52 ac 2.52 ac or Area to be revised Total Contributing Built Upon Area 42,806 sf 57,209 sf 72, 359 sf Total Coverage 40.1% 52.1% 65.9% Resulting Runoff 3,656 cf 4,748 cf 5,884 cf (1" rainfall) Approved Wetland 5,884 cf 5,884 cf 5,884 cf Volume Volumetric Runoff Calculations Simple Method Project Name: The College of the Albemarle - Professional Arts Building Modification (parking lot improvements) Created Wetland Drainage Area (without "Future" Allocation) Receiving Stream Name Shallowbag Bay Receiving Stream Class & Index Number SC (30-21-3) Drainage Area 109,771 SF Existing Impervious Area 42,806 SF Proposed Impervious Area 14,403 SF % Impervious Area (total) 52.1 % Impervious Surface Area On -site Buildings or Lot BUA 14,167 SF On -site Streets 0 SF On -site Parking 29,352 SF On -site Sidewalks/Concrete 10,305 SF Other on -site (FUTURE) 0 SF Off -site 3,385 SF Total: 57,209 SF Runoff Calculations (Simple Method) Design Runoff (in) 1 Total Area (Ac.) 109,771 Coverage 52.1% R(v) 0.519 Rainfall Volume 4,748 NCDENR Design: 4,748 Existing Proposed (original permit & (new parking & modification) "future" coverage) 14,167 0 0 0 19,094 10,258 9,545 760 0 0 0 3,385 42,806 14,403 Volumetric Runoff Calculations Simple Method Project Name: The College of the Albemarle - Professional Arts Building Modification (parking lot improvements) Created Wetland Drainage Area (with "Future" Allocation) wing Stream Name Shallowbag Bay Existing Proposed (original permit & (new parking & modification) "future" coverage) 14,167 0 0 0 19,094 10,258 9,545 760 0 15,150 0 3,385 42,806 29,553 wing Stream Class & Index Number SC (30-21-3) age Area 109,771 SF ng Impervious Area 42,806 SF ised Impervious Area 29,553 SF 3ervious Area (total) 65.9% vious Surface Area e Buildings or Lot BUA 14,167 SF e Streets 0 SF e Parking 29,352 SF e Sidewalks/Concrete 10,305 SF on -site (FUTURE) 15,150 SF e 3,385 SF Total: 72,359 SF Runoff Calculations (Simple Method) Design Runoff (in) 1 Total Area (Ac.) 109,771 Coverage 65.9% R(v) 0.643 Rainfall Volume 5,884_ NCDENR Design: 5,884 c F z rn SP O w � M IWA June 12, 2013 NCDENR DWQ 943 Washington Square Mall Washington, NC, 27889 RECEIVED J U N 14 2013 DWQ-WARO ATTN: Mr. Samir Dumpor RE: College of the Albemarle —Stormwater PermCSW77080:819MOD (Dare County) Modification for Parking Lot Improvements Dear Samir: (}1�d, 4 MM 1""J -I Please find the attached stormwater management application package for modifications to the College of the Albemarle, Manteo campus in Dare County. The original stormwater management permit (SW7080819) was issued to Dare County (property owner) for the construction of the New Professional Arts Building in 2008. The project included a created wetland that contained additional capacity to manage stormwater runoff (V rainfall event) from the new building and pavement plus future improvements to the campus. During construction on the Arts Building, the permit was modified in 2009 to include runoff from a "boat house" that was being added to the site. The college now intends to pave the existing on -site gravel parking lot. The project will include a new increase in site coverage as the lot is being expanded. Additional, the Town of Manteo is interested in constructing a sidewalk along the perimeter of the site, and that coverage is being included in this permit. A portion of the new parking lot and proposed sidewalk as well as a portion of the existing roadway is being directed into the created wetland. This package includes. • Stormwater management permit application form (1 original & 1 copy) • Submittal fee ($505) • Stormwater management narrative (1 original) • Runoff volume calculations (1 original) • Wetland Supplement (1 original) • Two sets of drawings o C201 Existing Site and Demolition Plan (dated 05/21/13) o C301 Parking lot addition Plan (dated 05/21/13) If you have any questions pertaining to this submittal, please do not hesitate to contact me, Sincerely, A Michael J. Morway, PE Engineer cc: Steve Wilt, MBAJ Architecture Robert Howard, College of the Albemarle Land Planning - Engineering - Environmental - Construction Management P.O. Box 3989, 115 W. Saint Clair St., Kill Devil Hills, North Carolina 27948 North Carolina License No. C-1027 Phone: 252-441-2113 www.AlbemarteAssociates.com Fax: 252-441-0965 `s Id'e�:'��3 Permit Number (to be provided by DWQ) '- AT h�oF W A Te9Or HCD� RC (� ��9E� o� AUG Z / ZOOS STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM C�l�9�i-l�9AR® WETLAND SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part Ill) must be printed, filled out and submitted along with all the required information. Project name College of the Albemarle New Professional Arts Building - Former Manteo Middle School Contact name Michael Morway, PE Phone number 252-441-2113 Date August 18, 2008 Drainage area number 1 Ill. DESIGN INFORMATION Site Characteristics Drainage area 106,860.00 ftZ Impervious area 40,126.00 ftZ Percent impervious 37.6% % Design rainfall depth 1.00 inch Peak Flow Calculations 1-yr, 24-hr runoff depth 3.80 in 1 -yr, 24-hr intensity 3.10 in/hr Pre -development 1-yr, 24-hr runoff 4.10 ft3/sec Post -development 1-yr, 24-hr runoff 4.70 ft3/sec Pre/Post 1-yr, 24-hr peak control 0.60 ft3lsec Storage Volume: Non -SR Waters Design volume (temporary pool volume) 5,884.00 ft3 OK Depth of temporary pool/ponding depth (Dp,$) 12.00 in OK Drawdown time 2.10 days OK Diameter of orifice 1.00 in OK Coefficient of discharge (CD) used in orifice diameter 0.60 (unitiess) calculation Driving head (Ho) used in the orifice diameter calculation 0.32 ft Provide calculations to support this driving head. Storage Volume: SR Waters Parameters 1-yr, 24-hr depth in Pre -development 1-yr, 24-hr runoff ft3 Post -development 1-yr, 24-hr runoff ft3 Minimum volume required ft3 Volume provided ft3 Form SW401-Wetland-Rev.2 Parts I and If. Project Design Summary, Page 1 of 3 Permit Number (to be provided by DWQ) Surface Areas of Wetland Zones Surface Area of Entire Welland 5,884.00 if OK Shallow Land 2,353.00fe OK The shallow land percentage is: 0.40 % Shallow Water 2,471.00 ftz OK The shallow water percentage is: 0.42 % Deep Pool Forebay portion of deep pool (pretreatment) 710.00 It' OK The forebay surface area percentage is: 0.12 % Non-forebay portion of deep pool 350.00111 OK The non-forebay deep pool surface area percentage is: 0.06 % Total of wetland zone areas 5,884.00 ftz OK Add or subtract the following area from the zones 0.00 R2 Topographic Zone Elevations Temporary Pool Shallow Land (top) 2.20 fmsl Permanent Pool Shallow Water (top) 1.20 fmsl Deep Pool (top) 0.70 fmsl Most shallow point of deep pool's bottom -0.80 first Deepest point of deep pool's bottom -1.00 fmsl Design must meet one of the following two options: This design meets Option #1, Deep pool is 6inches below SLWT, If yes: y (Y or N) SLWT (Seasonally Low Water Table) 0.70 first OK This design meets Option #2, Has a Gay liner If yes: Depth of topsoil above clay liner in Topographic Zone Depths Temporary Pool Shallow Land 12.00 in OK Permanent Pool Shallow Water 6.00 in OK Deep Pool (shallowest) 18.00 in OK Deep Pool (deepest) 20.40 in OK Planting Plan Are cattails included in the planting plan? n (Y or N) OK Number of Plants in planting plan recommended: Herbaceous (4inch diameter) 180 Shrubstsmall trees (1 gallon or larger) 120 Trees (1.5" dbh) 30 Number of Plants in planting plan provided (several species of each plant type are recommended): Herbacious (4inch diameter) 180 OK Shrubs/small trees (1 gallon or larger) 120 OK Trees (2.5" dbh) 22 Higher density is recommended. Form SW401-Wetland-Rev.2 Parts I and II. Project Design Summary, Page 2 of 3 Permit Number (to be provided by DWQ) Additional Information Can the design volume be contained? Does volume in excess of the design volume flow evenly distributed through a vegetated filter? What is the length of the vegetated filter? Are calculations for supporfing the design volume provided in the application? Is BMP sized to handle all runoff from ultimate build -out? Is the BMP located in a recorded drainage easement with a recorded access easement to a public Right of Way (ROW)? The length to width ratio is: Approximate wetland length Approximate wefland width Approximate surface area using length and width provided Will the wetland be stabilized within 14 days of construction? y (Y or N) OK y (Y or N) OK 30.00 it y (Y or N) OK y (Y or N) OK n (Y or N) Insufficient ROW location. 22.03:1 OK 360.00 ft 16.34 ft 5,882.40 ftZ This approx. surface area is within this number of square feet of the entire wetland surface area reported above: y (Y or N) OK Forth SW401-Wetland-Rev.2 Parts I and It. Project Design Summary, Page 3 of 3 Perm t No. (to be provided by DWQ) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Initials Pagel Plan Sheet No. M un- KP\1 C31Oa Kv\ C302 IMS� C3�2 MSlk 9 ti 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), Wetland dimensions (and length to width ratio), Pretreatment system, Maintenance access, Proposed drainage easement and public right of way (ROW), Overflow device, and ' Boundaries of drainage easement. 2. Plan details (1" = 50' or larger) for the wetland showing: - Wetland dimensions (and length to width ratio) Pretreatment system, Maintenance access, Proposed drainage easement and public right of way (ROW), Design at ultimate build -out, Off -site drainage (if applicable), Overflow device, and Boundaries of drainage easement. 3. Section view of the wetland (1" = 20' or larger) showing: - Side slopes, 3:1 or lower - Wetland layers All wetlands: Shallow land depth, shallow water depth, deep pool depth Option 1, no clay liner: SLWT depth Option 2, clay liner: Depth of topsoil on top of liner, liner specifications RECISVIED AUG 2 7 2008 4. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: - A variety of suitable species (not including cattails), - Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, - A planting detail, - The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. 5. A construction sequence that shows how the wetland will be protected from sediment until the entire drainage area is stabilized. 6. The supporting calculations (including drawdown calculations). 7. A copy of the signed and notarized operation and maintenance (0&M) agreement. 8. A copy of the deed restrictions (if required). K�Vll �KN2J 9. 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. SW401-Wetland-Rev.2 Part III, page 1 of 1 RECEWED Permit Number: AUG 2 7 2008 (to be provided by DWQ) Drainage Area Number: Stormwater Wetland Operation and Maintenance Agreement DWQ-WAR® I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — Immediately after the stormwater wetland is established, the wetland plants will be watered twice weekly if needed until the plants become established (commonly six weeks). — No portion of the stormwater wetland will be fertilized after the first initial fertilization that is required to establish the wetland plants. — Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wet detention basin. — Once a year, a dam safety expert will inspect the embankment. (NcC' After the wet detention pond is established, I will inspect it once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to wetland erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide time and a one-time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. The inlet device: pipe or The pipe is clogged (if Unclog the pipe. Dispose of the swale applicable). sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Form SW401-Wetland O&M-Rev.3 Page 1 of 4 BMP element: Potentialproblem: How I will remediate theproblem: The forebay Sediment has accumulated in Search for the source of the the forebay to a depth that sediment and remedy the problem if inhibits the forebay from possible. Remove the sediment and functioning well. 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 a pesticide is used, wipe it on the plants rather than spraying. The deep pool, shallow Algal growth covers over Consult a professional to remove water and shallow land 50% of the deep pool and and control the algal growth. areas shallow water areas. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray) - the deep pool and shallow consult a professional. water areas. Shallow land remains flooded Unclog the outlet device more than 5 days after a immediately. storm event. 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. Best professional practices Prune according to best professional show that pruning is needed practices. to maintain optimal plant health. Sediment has accumulated Search for the source of the and reduced the depth to 75% sediment and remedy the problem if of the original design depth possible. Remove the sediment and of the deep pools. dispose of it in a location where it will not cause impacts to streams or the BMP. Form SW401-Weiland O&M-Rev.3 Page 2 of 4 BMP element: Potentialproblem: How I will remediate theproblem: The embankment 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. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. The micropool Sediment has accumulated Search for the source of the and reduced the depth to 75% sediment and remedy the problem if of the original design depth. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Plants are growing in the Remove the plants, preferably by micropool. hand. If a pesticide is used, wipe it on the plants rather than spraying. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. Form SW401-Wetland O&M-Rev.3 Page 3 of 4 Permit Number: be provided by DlVQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. 1 agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:Colleize of the Albemarle New Professional Arts Building BMP drainage area number: Print Title:County Attorney - Dare County t 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, \Jail f to - w i %l i n ms a Notary Public for the State of Nor -A Lrchna , County of do hereby certify that j�ober F t0U-1%n personally appeared before me this 19 day of _&gu'si bo,? , and acknowledge the due execution of the forgoing stormwater wetland maintenance requirements. Witness my hand and official seal, �•�p� E. 64gC� °°F°o °°F'o-5[5"AAi^t SEAL My commission expires / I' a 1)- 01? Form SW401-Wetland O&M-Rev.3 Page 4 of 4