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HomeMy WebLinkAboutSW8041111_CURRENT PERMIT_20041124STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE � CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD F ATF �� ,onJP o RQG o � November 24, 2004 Ms. Ardieth Lupton, Vice President Willa Properties, Inc. PO Box 1104 Smithfield, NC 27577 Subject: Stormwater Permit No. SW8 041111 Lake Brewster Subdivision High Density Subdivision Project New Hanover County Dear Ms. Lupton: Michael F. Easley, Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of Water Quality The Wilmington Regional Office received a complete Stormwater Management Permit Application for Lake Brewster Subdivision on November 19, 2004. 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. SW8 041111 dated November 24, 2004, for the construction of the project, Lake B. This permit shall be effective from the date of issuance until. November 24, 2014, 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, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or me at (910) 395-3900. Sincerely, Rick Shiver Regional Supervisor Surface Water Protection Section RSSlarl: S:IWQSISTORMWATIPERMIT1041111.nov04 CC'. Amie Drucker, P.E., Carolina Site Design Tony Roberts, New Hanover County Inspections City of Wilmington Development Services Beth E. Wetherill, New Hanover County Engineering Linda Lewis ,1Nil nmt gton-Regional-Office Central Files �z6-Loeo t LC 4vt : die 40 -ago - 5��v �CWAZ'Q./ North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington Regional Office Wilmington, NC 28405-3845 An Equal OpportunitylAffirmative Action Employer — 50% Recycled110% Post Consumer Paper Phone (910) 395-3900 Customer Service 1-877.623-6748 FAX (910) 350-2004 Internet: h2o.enr.state.nc.us None rthCarolina Naturally State Stormwater Management Systems Permit No. SW8 041111 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 Ardieth Lupton & Willa Properties, Inc. Lake Brewster Subdivision Vallie Lane, New Hanover County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "storm water 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 November 24, 2014 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 1.5 on page 3 of this permit. The subdivision is permitted for 137 lots, each allowed 4,050 square feet of built -upon area. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 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. Page 2 of 9 State Stormwater Management Systems Permit No. SW8 041111 5 The following design elements have been permitted for this wet detention pond stormwater facility, and must be provided in the system at all times. a. Drainage Area, acres: 36.06 Onsite, ft2: 1,570,808 Offsite, ft2: 0 b. Total Impervious Surfaces, ft2: 768,270 137 Lots at 4,050 ft2: 554,850 Roads/Parking, ft2: 187,860 Other, ft2: 25,560 Offsite, ft2: 0 C. Pond Depth, feet: 6.0 d. TSS removal efficiency: 90% e. Design Storm: 1 f. Permanent Pool Elevation, FMSL: 6.00 g. Permitted Surface Area @PP, ft2: 92,075 h. Permitted Storage Volume, ft3: 65,907 i. Storage Elevation, FMSL: 6.7. j. Controlling Orifice: 4°0 pipe k. Permanent Pool Volume, ft3: 176,715 I. Forebay Volume, ft3: 39,750 m. Maximum Fountain Horsepower: 314 n. Receiving Stream 1 River Basin: Mott Creek 1 Cape Fear o. Stream Index Number: CPF17 18-82 p. Classification of Water Body: "C Sw" II. SCHEDULE OF COMPLIANCE 1. No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature (such as swales) shown on the approved plans as part of the stormwater management system without submitting a revision to the permit and receiving approval from the Division. 2. The permittee is responsible for verifying that the proposed built -upon area for the entire lot, including driveways and sidewalks, does not exceed the allowable built -upon area. Once the lot transfer is complete, the built -upon area may not be revised without approval from the Division of Water Quality, and responsibility for meeting the built -upon area limit is transferred to the individual property owner. Page 3 of 9 State Stormwater Management Systems Permit No. SW$ 041111 3. If an Architectural Review Board or Committee is required to review plans for compliance with the BUA limit, the plans reviewed must include all proposed built -upon area. Any approvals given by the Board do not relieve the homeowner of the responsibility to maintain compliance with the permitted BUA limit. 4. 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 the approved plans, regardless of size. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area. e. Further subdivision, acquisition, or sale of ail 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. 5. The Director may determine that other revisions to the project should require a modification to the permit. 6. 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. 7. 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. S. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 9. 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. 10. 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. 11. Permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Page 4of9 State Stormwater Management Systems Permit No. SW8 041111 12. Prior to the sale of any lot, the following deed restrictions must be recorded: a. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW8 041111, as issued by the Division of Water Quality under NCAC 2H.1000. b. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the Stormwater Management Permit. C. These covenants are to run with the land and be binding on all persons and parties claiming under them. d. The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the State of North Carolina, Division of Water Quality. e. Alteration of the drainage as shown on the approved plans may not take place without the concurrence of the Division of Water Quality. The maximum built -upon area per lot is 4,050 square feet. This allotted amount includes any built -upon area constructed within the lot property boundaries, and that portion of the right-of-way between the front lot line and the edge of the pavement. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. g. All runoff on the lot must drain into the permitted system. This may be accomplished through providing roof drain gutters which drain to the street, grading the lot to drain toward the street, or grading perimeter swales and directing them into the pond or street. tots that will naturally drain into the system are not required to provide these measures. h. Built -upon area in excess of the permitted amount will require a permit modification. 13. A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of recording the plat, and prior to selling lots. The recorded copy must contain all of the statements above, the signature of the Permittee, the deed book number and page, and the stamp/signature of the Register of Deeds. 14. Decorative spray fountains will be allowed in the stormwater treatment system, subject to the following criteria: a. The fountain must draw its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. C. The failing water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for the fountain's pump is based on the permanent pool volume. The maximum pump power for a fountain in this pond is 3/4 horsepower. Page 5 of 9 State Stormwater Management Systems Permit No. SW8 041111 15. Prior to transfer of the permit, the stormwater facilities will be inspected by DWQ personnel. The facility must be in compliance with all permit conditions. Any items not in compliance must be repaired or replaced to design condition prior to the transfer. Records of maintenance activities performed to date will be required. 16. The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stormwater system function at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. c. Mowing and revegetation of side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of structures, orifice, catch basins and piping. g. Access to all components of the system must be available at all times. 17. 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. 18. 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. 19. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. III. GENERAL CONDITIONS This permit is not transferable to any person or entity except after notice to and approval by the Director. In the event there is either a desire for the facilities to change ownership, or there is a name change of the Permittee, a "Name/Ownership Change Form" must be submitted to the Division of Water Quality accompanied by appropriate documentation from the parties involved. This may include, but is not limited to, a deed of trust, recorded deed restrictions, Designer's Certification and a signed Operation and Maintenance plan. The project must be in good standing with DWQ. 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 of the terms and conditions of this permit until such time as the Director approves the transfer request. 3. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 4. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction. Page 6 of 9 State Stormwater Management Systems Permit No. SW8 041111 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 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. Permittee grants permission to staff of the DWQ to access the property for the purposes of inspecting the stormwater facilities during normal business hours. 8. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. 9. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. Permit issued this the 24th day of November 2004. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Alan W. Klimek, P: ., Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 041111' Page 7of9 State Stormwater Management Systems Permit No. SW8 041111 Lake Brewster Subdivision Stormwater Permit No. SW8 041111 New Hanover Count Designer's Certification Page 1 of 2 I, , as a duly registered in the State of North Carolina, having beer► authorized to observe (period icallylweeklylfu11 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 are a part of this Certification. Noted deviations from approved plans and specifications: Signature Registration Number Date SEAL Page 8of9 State Stormwater Management Systems Permit No. SW8 041111 Certification Requirements: Page 2 of 2 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, a forebay, and the vegetated filter. .15. The required dimensions of the system are provided, per the approved plan. cc: NCDENR-DWQ Regional Office Tony Roberts, New Hanover County Building Inspections Page 9of9 ' V . Permit Number �IIMFX/&TI//►iiTiL%i='JLfII/�>L1Aifi1�111t� State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be pholocopiedlor use as an original 1. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): Willa Properties, Inc. 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Ardieth Lupton, Vice -President 3. Mailing Address for person listed in item 2 above: P.O. Box H 04 City: Smithfield State: NC Zip: 27577 Telephone Number: (919) 880-7630_ 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans; specifications, letters, operation and maintenance agreements, etc.): Lake Brewster 5. Location of Project (street address): '501 Vallie Lane City: Federal Point Township County: New Hanover 6. Directions to project (from nearest major intersection): Carolina Beach Road (NC 421) to Vallie Lane. Project is at end of Vallie Lane 7. Latitude: N 340 08' 11 Longitude: W 77" 54' 19" of project 8. Contact person who can answer questions about the project: Name: Arnie Drucker Telephone Number: (843) 280-5870 II. PERMIT INFORMATION: Specify whether project is (check one): X New Renewal Modification Form SWU-101 Version 3.99 Page 1 of 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue -date (if known) 1N � . N % 3. Specify the type of project (check one): Low Density X High Density Redevelop General Permit Other 4. Additional Project Requirements (check applicable blanks): CAMA Major Sedimentation/Erosion Control 404/401 Permit NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Stormwater runoff will be directed to a wet pond for treatment via a system consisting of concrete curbinp, and a network of culverts. 2. Stormwater runoff from this project drains to the Cape Fear River basin. 3. Total Project Area: 47.4 acres 4. Project Built Upon Area 5. How many drainage areas does the project have? I 49 . % 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. BasinJn'-formahon. ' _ -Draina e: Area-1 = "� ` A °"Draina e-Area 2 -� , Stream Name Mott's Creek -Receiving -Receiving Stream Class C;Sw Area 1,570,808 sf (36.06 Ac) -Drainage Existing Impervious* Area 0 Proposed Impervious* Area 768,270 sf(17.63 Ac) % Impervious' Area (total) 49% Im ervious .Surface Area 'k . , w: - ';_Drainage Are6­1 X .�x Draina e'Area 2 - On -site Buildings 554,850 sf On -site Streets 187.860 sf On -site Parkin On -site Sidewalks 25.560 sf Other on -site Off -site Total: 768,270 sf Total: Form SWU-101 Version 3.99 Page 2 of 4 1 If this application is being submitted as the result of a renewal onmodification to an existing permit., list the existing permit number and its issue date (if known) 3. Specify the type of project (check one): Low Density X High Density Redevelop 4. Additional Project Requirements (check applicable blanks): CAMA Major _ Sedimentation/Erosion Control General Permit Other 404/401 Permit NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Stormwater runoff will be directed to a wet pond for treatment via a system consisting of concrete curbing and a network of culverts. 2. Stormwater runoff from this project drains to the — Cave Fear River basin. 3. Total Project Area: 47.4 acres 4. Project Built Upon Area: 49 % 5. How many drainage areas does the project have? I 6. Complete the following information for each drainage area. If there" are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. A Yis i W, I ifr13i t i b nr. r—ai id-90AFrael.%R,W I, Stream Name Mott's Creek -Receiving Stream Class C;SW -Receiving Area 1,570,808 s�6.06 Ac) -Drainage Impervious* Area 0 _Existin Proposed Impervious' Area 768,270 sf (17.63 Ac) % Impervious' Area (total) 49% a e--: Buildings 554,850 sf -On-site On -site Streets 187,860 sf Parking -On-site On -site Sidewalks 25,560 sf Other on -site Off -site Total: 768,270 sf Total: Form S WU- 10 1 Version 3.99 Page 2 of 4 * Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. 7. How was the off -site impervious area listed above derived? N/A IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. 1. The following covenants are intended to ensure ongoing compliance with state storm -wafer management permit number as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. 2. No more than 4,050 square feet of any lot shall be covered by structures or impervious materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood decking or the water surface of swimming pools. 3. Swales shall not he filled in, piped, or altered except as necessary to provide driveway crossings. 4. Built -upon area in excess of'the permitted amount requires a state stormwater management permit modification prior to construction. 5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control system. These connections to the stormwater control system shall he performed in a manner that maintains the integrity and performance of the system as permitted. By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SWU-102 Wet Detention Basin Supplement FormSWU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off -Site System Supplement FormSWU-107 Underground Infiltration Trench Supplement FormSWU-108 Neuse River Basin Supplement FormSWU-109 Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Page 3 of VL SUBMITTAL REQUIREMENTS - - Only complete'appllcaiion.packages will be. acce pted. and reviewed by the Division of Water Quality (DWQ)- A -complete package,inciudes:all of the Items -listed below. The complete application package should. be, submitted to the appropriate-DWQ•Rrgional Office - I.. Please -indicate, that you. have provided the following required information.by initialing ih the space - '-provided next to each item.' Initials ' Original:and one copy of.the.StormWater.Management Permit Application Form One copy of the applicable' Supplement Form(s). far each Bid ' Permit:application processing fee of S420 (payable to NCDENR) • Detailed narrative description of stotmwater treatment/tnanagement_AA_ •. 'TWO. Copies of plans and specifications, including: Dgvelopm61nt/Pr0ject name En&Aer and firm -,I:eMd . North' arrow Scale - Revision number &. date - Mean high water line . - Dimensioned property/project bottndary - Location map_with.named streets of NC SR numbers. - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads; drainage features, collection systems,'and stormwater control measures Wetlands delineated, or'a note on -plans: that none exist Existing drainage (inc luding'off-site); drainage easements, pipe sizes, runoff calculations - Drainage areas delineated Vegetated buffers (where. required) VH.'AGENT AUTHORIZATION. .Ifyou wish to designate.authcinty•to. another individual or firm so that thev may,provide information on your behalf Please coal - lete this section: Designated agent (individual or firm).- CmWina Site Desi . Inc. Mailing Address: P.D: Box 538 City: N Myrtle Beach Stater SC Zip: '--295$7 Phone: { '..$4; �- 2$9=5870 Fax:( 843 _ l_ 280-5870 -- - VM. APPLICANT'S CERTIFICATION 1; (print. or type'name of person listed in Gene�'vl Information, item 2) __ _ Ardioth Laptop -,;certify that the. . information included on.this perrnit:applicationform-is; to the best of my knowledge, coned and that the.. project will be.constructed in conformance with the spproved:plans, that die required deed restrictions'and •.protective covenants will:be,recorded; and thautbi 'proposed project complies with the requirements of 15A NCAC -2H.1000 J -Date: . Form SWU-101`version'3,99 Page 4 of4' _ VL SUBMITTAL REQUIREMEI-CrS _ Only complete appllcation,packages will be aecepted..aud reviewed by the Division of Water Quality -(DWQ). A -complete package includes'aU, of the items.11sted below. The complete appGcatioo package should be submitted to the appropriate DWQ Regional Officc- 1. Please -indicate that you have provided the following requited information,by initialing is the space provided next to each item. Initials OriginalAnd one copy-of.tht-Stormwater Management Permit Application Form _ CD . • .. One copy of the applicable SupplementFarin(s).for each BMW Pe'rmit',application processing fee of WO (payable to NCDENR) � Detailed narrative description of stormwater treatment/management +, IIvo:copies ofplaris and specifications including: Development/project name - Engimeer and firm - Legend - North, arrow Scale - R,6yision number & 'date - Mean high water line - Dimensioned. property/project boundary Location map_ with named -streets or NCSR numbers . - Original contours, proposed contours; spot elevations, finished Hoar elevations - Details, of roads, drainage featvres,:collection systems, and stonnwater control measures = Wetlands delineated, or a note'on'plans:that none exist . - Existing drainage (including'off site); drainage easements, pipe siies, runoff.calcuiations - Drainage areas delineated Vegetated buffers (where required) VM AGENT AUTHORIZATION - If 'you wish to desipate authority to another individual or firm so that they may. provide information on your behalf* plcaseconiple2e this section: .Designated agent (i adividu�l on firm):. C .. ins Site Design..I.nc, Mailing Address: P.O. Box 538 City: North iy(yrile Beach State: SC Zip. 29597 „_ Phone: % ' 843 28q-5870 Fax. C $43 l 280-5870' _ VIIE APPLICAN-T'S CERTiFICATiON I, (priht.or Type name ofperson listed in Generallnforination, item Z) �4rdaetlZ }lptgn .ceRify that the . information included on -this permif application forth, isto the best of my knowledge, correct and that the'.. projectwill.be Icons 2nicted in conformance with file approved:plans,.that the.re,quired deed restrictions and protective covenants will:be .re corded, and thartbi 'proposed project complies with the requirements of 15A NCAC M.1000 Signature: �i�-v� 1 C� Dale: f rO Ll Form SWU-101 Versicm3,99 Page 4 of 4 Permit No. AANOII (to be provided 6,v DWQ State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM. WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ Stormwater Management Plan Review: A complete Stormwater management plan submittal includes an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. 1. PROJECT INFORMATION Project Name: Lake Brewster Contact Person: Amie Drucker, P.E. _ Phone Number: 843 280-5870 For projects with multiple basins, specify which basin this worksheet applies to: elevations Basin Bottom Elevation 0.0 ft. (floor of the basin) Permanent Pool Elevation 6.0 ft. (elevation of the orifice) Temporary Pool Elevation 6.7 ft. (elevation of the discharge structure overflow) areav Permanent Pool Surface Area 92,075 sq. ft. (water surface area at the orifice elevation) Drainage Area 36.06 ac. (on -site and off -site drainage to the basin) Impervious Area 17.63 ac. (on -site and off -site drainage to the basin) volumes Permanent Pool Volume 176,715 Cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 65,907 cu. ft. (volume detained above the permanent pool) Forebay Volume 39,750 cu. ft. (approximately 20% of'total volume) Other parameters SA/DA' Diameter of Orifice Design Rainfall Design TSS Removal z 1.5 4 in. 8.05 in, 90 % (surface area to drainage area ratio from DWQ table) (2 to 5 day temporary pool draw -down required) (minimum 85% required) Footnotes: When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non- standard table entries. Z In the 20 coastal counties, the requirement for a vegetative filter may be waived it' the wet detention basin is designed to provide 90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal. 11. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. Applicants Initials a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). QA> b. The forebay volume is approximately equal to 20% of the basin volume. Q c. The temporary pool controls runoff from the design storm event. get— d. The temporary pool draws down in 2 to 5 days. u1.A _ e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) 0 f. The basin length to width ratio is greater than 3:1 J) g. The basin side slopes above the permanent pool are no steeper than 3:1. �C4� h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). 4 i. Vegetative cover above the permanent pool elevation is specified. J. A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. 1. If the basin is used for sediment and erosion control during construction; clean out of the basin is specified prior to use as a wet detention basin. m. A mechanism is specified which will drain the basin for maintenance or an emergency. 1I1. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT 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) 0 does 0 does not incorporate a vegetated filter at the outlet. This system (check one) 0 does 6 does not incorporate pretreatment other than a forebay. Forms WU-102 Rev 3.99 Page 2 of 4 Footnotes: ' When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non- standard table entries. In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet:detention basin is designed to provide 90% TSS removal, The NCDENR BMP manual provides design tables for both 85%TSS removal and 90% TSS removal. II. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below, if a requirement has not been met, attach justification. Applicants Initials A a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). _QA)_ b. The forebay volume is approximately equal to 20% of the basin volume. Q�-_>` c. The temporary pool controls runoff from -the design storm event. —q:�!— d. The temporary pool draws down in 2 to 5 days. tii AA e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) („ f. The basin length to width ratio is greater than 3:1. g. The basin side slopes above the permanent pool are no steeper than 3:1. h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). _�_ i. Vegetative cover above the permanent pool elevation is specified. at _ J. A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. WO 1. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified prior to use as a wet detention basin. m. A mechanism is specified which will drain the basin for maintenance or an emergency. III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT 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) 0 does i does not incorporate a vegetated filter at the outlet. This system (check one) 0 does 6 does not incorporate pretreatment other than a forebay. FormSWU-102 Rev 3.99 Page 2 of 4 iy Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: . a:, ` Inspect the wef detention basin system for sediment acdumulation, erosion `trash accumulation; vegetated cover, and. general condition. b. Check and clear the orifice of any obstructions such that: drawdown of the temporary pool occurs _! ,within 2 to 5 days as designed. 2.Repair' eroded areas immediately, re -seed as necessaryto maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3.' Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of, in an appropriate manner and shall be handled in a manner that will not adversely impact water quality {i.e. stockpiling near a wet detention basin or stream, etc.). 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 i 7.5 feet in the main pond; the, sediment shall be removed. When the permanent pool depth reads 3 fe6fin the forebay, the sediment shall be removed. F r .y •,i, BASIN DIAGRAM S. Remove cattails and other indigenous wetland plants when they cover 50% of the basin •surface. These r = plants shail.be encouraged to grow along the vegetated shelf and forebay berm. 6. ' If,,, the '•basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical. ;t ;Ii �s%I.l' w••ir. }; formSWU;102 Rev 3.99 Page 3 of 4 7. All components 'of the wet. detention basin system shall- be maintained in good working order. ' I acknowledge. and agree by :my; 'signature below that 1 am responsible for the performance of the severs '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. Print name: _ A.rdieth Liiritoti Title: =Vice -President Address: P.O. aox 1104, Smithfield. NC 27577 -- Phone_ el 91-880-7630 Signature: Date: ! �' I ^c- L_/- Note: The, Legally respon4ible-party should not bo a homeowners association unless more than 50% of the lots have bcon sold and a resident of the subdivision has been named the president. t2eA'? e, • C� QVII26_ a Notary Public for the State of County 0E�ro�Y�St .� do hereby certify that�1 personally appeared before me this day of &I - , and acknowledge the due execution of the forgoing,,uet detention basin maintenance requirements. Witness my hand and official seal, . .. �l�n �yNno. Np w . * 0. SEAL N;A�,` �6 b 10A r . My commission expires Forth SWU-102 Rtv 3.99. Wage 4pf 4 7. All ,;omponents'of the wet detention basin system shall be maintained in good working order. 1 acimowiedge. and agree by my:signature below .that I am responsible for the performance of the seven 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. Fri t name: Ardieth Lupton Title: :Vice -President._: Address: P.O. Hox J 04,_amithfiteld, NC 27577 Phone, 91-880-7630 Signature: �C Date: -- Note: The le ally respohiible piury should not be a h meowners association unless more than 50% of the lots have bcvn sold and a residcut of the subdivision bas been named the president. .I*" —W C)pig£S a Notary Public for the State of County of &- hereby certify that personally appeared before me this day ofT��. , _ and acknowledge the due execution of the foreoiiie wet detention basin maintenance 'tequirernents.- Witness my hand and official seal, A, Nnaoo.. ` nIle * 0 SEAL 1 tln�2 y� b10� moo,, 33 My commission expires - --A-z..l V P;E) FI L-C MAR 2006 5W It BY; CAROLINA Engineering —Planning )SITE DESIGN, Inc. P. O. Box 538 North Myrtle Beach, SC 29597 843-280-5870 843-280-5870 Fax Send To Date March 7, 2006 Company Name NCDENR-Water Quality Address City Re: Lake Brewster Subdivision WE ARE SENDING YOU ® Attached ❑ Under separate cover via hand delivery the following: ❑Plans ❑ Diskette ❑ Copy of Letter ❑Report ❑ Proposal ❑ Date Copies Description 3-6-06 1 Designer's Certification (Sheets 1 & 2) 9-20-05 1 Copy of Recorded Declaration of Restrictive and Protective Covenants for Lake Brewster Subdivision DB 4906,PG 899-913) THESE ARE BEING TRANSMITTED AS INDICATED BELOW: ❑ As Requested ❑ For Your Comments ❑ Returned Auer Loan to Us ® For Approval ❑ Approved As -Is ❑ For your signature ❑ For Your Use ❑ Returned with Corrections ❑ For Bids Due Comments: Sincerely: State Stormwater Management Systems r� Permit No. SW8 041111 Lake Brewster Subdivision Stormwater Permit No. SW8 041111 New Hanover County Designer's Certification Page 1 of 2 1, Amie Drucker -,as a duly registered professional engineer in the State of North Carolina, having been authorized to observe (Periodically/weekly/full time) the construction of the project, Lake Brewster (Project) for Willa properties, LLc (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 are a part of this Certification. Noted deviations from approved plans and specifications: SIQ��� SEAL S7*At5 Signature T"� Registration Number S. Date y 4 State Stormwater Management Systems ` Permit No. SW8 041111 Certification Requirements: Page.2 of 2 Gi� 1. The drainage area to the system contains approximately the permitted acreage. AA 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_4. All roof drains are located such that the runoff is directed into the system. oA) 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. Q�2 8. All slopes are grassed with permanent vegetation. S-_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, a forebay, and the vegetated filter. C6� 15. The required dimensions of the system are provided, per the approved plan. cc: NCDENR-DWQ Regional Office Tony Roberts, New Hanover County Building Inspections