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HomeMy WebLinkAboutSW8070226_HISTORICAL FILE_20070316STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO SW8 01 0Z2,-p DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE C)0"1 O31 YYYYMMDD M chael F as] y Go emo William Ross Secretary No th Ca olma Department of En to ment and Natural Resources J Alan W Klimek P h Director Div lion of N ater Quality March 16 2007 Jimmy Ellington Owner 14921 US Highway 17 Hampstead NC 28443 Subject Stormwat4r Permit No SW8 070226 Cypress grove Townhomes High De ity Project Pender ounty Dear Mr Ellington The Wilmington Regional Office received a complete Stormwater Management Permit Application for Cypress Grove Townho!T�s on March 14 2007 Staff review of the plans and specifications has determined that the project as proposed will comply with the Stormwater Regulations set forth in Title 15�A-NCAC 2H 1000 We are forwarding Permit No SW8 070226 dated March 16/ 2007 for the construction of the subject project This permit shall be effect from the date of issuance until March 16 2017 and shall be subject to the 6onddidns 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 adjddicatory hearing upon written) request within sixty (60) days following receipt of this permit This request must be irothe form of a written petition conforming to Chapter 150B�of the North Carolina General Statutes and filed with the Office of Administrative Hearings P ONDrawer 27447 Raleigh NC 27611 7447 Unless such demands are made this permit shall be final an inding If you have any questions or need additional infor contact Chris Baker or me at (910) 796 7215 Sincer iy� Edward eck Regional Supervisor Surface Water Protection Section ENB/csb S \WQS\STORMWAT!'R\PERMIT\0 cc Michael C Gallant P E PA Pender County Building Inspections Chris Baker Wilmington Regional Office Central Files please N,o,(�hCarolma Wurallil No Yh Carol Di son of Water Quality 1617 Ma I Sera ce Cente Raleigh NC 27699 1617 Pho e (919) 733 7015 Customer Service Internet www newatero at tv o e Location N 512 Salisbury St R le gh NC 27604 Fax (919) 733 2496 1 877 623 6748 An Equal OpportunitylAf(nnative Action Employer— 50 A Recycledfl0 /6 Post Consumer Paper State Stormwater Management Systems Permit No SW8 070226 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 Jimmy Ellington Cypress Grove Townhomes Pender 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 stormwaterrules and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit This permit shall be effective from the date of issuance until March 16 2017 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 16 on page 3 of this permit The stormwater control has been designed to handle the runoff from 128 808 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 protect must be directed into the permitted stormwater control system Page 2 of 7 State Stormwater Management Systems Permit No SW8 070226 The following design criteria have been provided in the wet detention pond and must be maintained at design condition Basin A Basin B a Drainage Area ac (1) Onsite ft2 2 Offsite ft2 288 125 397 None 312 135 864 None b Total Impervious Surfaces ft (1) Buildings ft2 (2) Roads/Streets ft2 (3) Driveways ft2 4 Sidewalks ft2 69 764 29 220 31 040 8 221 1 283 59 044 31 110 16 297 9 845 1 792 c Pond Depth feet 5 5 d Design Storm in 1 5 1 5 e Permanent Pool Elev FMSL 44 44 f Perm Pool Surface Area ft2 9 631 8 268 g Permitted Storage Volume ft 14 458 15 459 h Temporary Storage Elev FMSL 4538 4567 i Controlling Orifice 0 pipe 1 5 1 5 t Permitted Forebay Volume ft 11 132 5 868 k Max fountain horsepower 1/8 1/8 1 TSS removal efficiency °/ 90 90 m Receiving Stream / River Basin Harnsons Creek/Cape Fear n Stream Index Number 18 7449 o Classification of Water Body C SW II SCHEDULE OF COMPLIANCE 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 Mowing 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 SW8 070226 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 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 to the deepest part of the pond c The falling water from the fountain must be centered in the pond away from the shoreline d The maximum horsepower for a fountain in this pond is 1/8 horsepower 6 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 8 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 9 Access to the stormwater facilities shall be maintained via appropriate easements at all times 10 The permittee shall submit to the Director and shall have received approval for revised plans specifications and calculations prior to construction for any modification to the approved plans including but not limited to those listed below a Any revision to any item shown on the approved plans including the stormwater management measures built upon area details etc b Protect 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 protect area The protect area is defined as all property owned by the permittee for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought f Filling in altering or piping of any vegetative conveyance shown on the approved plan 11 The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans prior to construction 12 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 Page 4 of 7 State Stormwater Management Systems Permit No SW8 070226 13 The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit Within the time frame specified in the notice the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made III GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director In the event of a change of ownership or a name change the permittee must submit a 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 2 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 Permit issued this the 16th day of March 2007 NORTH-AROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Alan Klimek P E Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 State Stormwater Management Systems Permit No SW8 070226 Cypress Grove Townhomes Stormwater Permit No SW8 070226 Pender County Designers 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 SW8 070226 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 Pender County Building Inspections Page 7 of 7 qiy �.a FT- 6 a ; I`"v *OFFICE USE ONLY s Date Received Fee Paid Permit Number 7. Zti l57 `foot) 101 Sw�n_7H State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I GENERAL INFORMATION 1 Applicants name (specify the name of the corporation individual etc who owns the project) . , ', E//"'?X-Y-) 2 Print Owner/Signing Officials name and title (person legally responsible for facility and compliance) 3 Mailing Address for person listed in item 2 above 2 City /f/t4n—All: Telephone Number %7 9/o 1 x.29- .46 State /VC Zip 2S>Vz1 4 Project Name (subdivision facility or establishment name should be consistent with project name on plans specifications letters operation and maintenance agreements etc ) L'o";?2 Ss 5 Location of Project (street address) City County /'. A)6EoC 6 Directions to project (from nearest major intersection) s=/[0-,W ink✓sechoH or/' U5 /7 74u%r �L yuUr 20 �S2/S7 Aw //3 % FEET 414 y7' s%o-�7 L� 7 Latitude 3y'.22110 ?z5uW Longitude 77 c',121V7 30iiZ-0 of project 8 Contact person who can answer questions about the project Name e AE Telephone Number II PERMIT INFORMATION 1 Specify whether project is (check one) New Renewal Modification Font) SWU 101 Version 3 99 Page] of 4 2 If this application Is being submitted as the result of a renewal or modification to an existing permit list the —existing permit number 1y 4 and its issue date (if known) 3 Specify the type of project (check one) _Low Density /L High Density _Redevelop _General Permit Other 4 Additional Project Requirements (check applicable blanks) _CAMA Major X 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 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 Droiect 2 Stormwater runoff from this project drains to the Ge?! Fes/ River basin 3 Total Project Area la O acres 5 How many drainage areas does the project have7_Z 4 Project Built Upon Area V % 3 % 6 Complete the following information for each drainage area if there are more than two drainage areas to the project attach an additional sheet with the information for each area provided in the same format as below Receiving Stream Area 'Area % Impervious Area l-r/AXICr C �w 4�Y{' enage Area I Drainage Akea 2 On site Buildings ay y //0 D "Z 9(a 6 On site Streets 7 f O y p O On site P8+b99(bQIVEWAY5 2 ;Z e) c gt/ On site Sidewalks 7r7121 Other on site ZP Off site Total G,c� 117e, 3 Total Imperviousarea Is defined as the built upon area including but not limited to buildings roads parking areas sidewalks gravel areas etc Form S WU 101 Version 3 99 Page 2 of 4 7 How was the off site impervious area listed above derived? IV DEED RESTRICTIONS AND PROTECTIVE COVENANTS Tou�A/�o/yrc`S, A/o c.oTS To SEµL�L�/.4-Gt- /�,oEQ,VloL4S R2SA5 The following italicized deed restrictions and protective covenants are requ,r"eci 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 stormwater management permit number 4 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 IVA 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 be 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 be performed in a manner that maintains the mtegrity 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 Form SWU 103 Infiltration Basin Supplement Form SWU 104 Low Density Supplement Form SWU 105 Curb Outlet System Supplement Form SWU 106 Off Site System Supplement Form SWU 107 Underground Infiltration Trench Supplement Form SWU 108 Neuse River Basin Supplement Form SWU 109 Innovative Best Management Practice Supplement Form SWU 101 Version 3 99 Page 3 of 4 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 The complete application package should be submitted to the appropriate DWQ Regional Office 1 Please indicate that you have provided the following required information by initialing in the space provided next to each item Original and one copy of the Stormwater Management Permit Application Form One copy of the applicable Supplement Form(s) for each BMP Permit application processing fee of $420 (payable to NCDENR) Detailed narrative description of Stormwater treatment/management Two copies of plans and specifications including Development/Project name Engineer and firm Legend North arrow Scale Revision 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 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 (including off site) drainage easements pipe sizes runoff calculations Drainage areas delineated Vegetated buffers (where required) VII AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf please complete this section Designated agent (individual or firm) 41Cf/4E4- C 6 gye-,g,0r ID E 10,4 MaihngAddress /CO BOX VO317 City Sv2 - C/Ty State Al C Zip �2 8z/elS Phone ( 9/O ) 3,2F Fax ( 9/0 ) 3:29- — �7-730 Vill APPLICANTS CERTIFICATION I (print or type name of person listed in General Information item 2) Jl i ly) Y �rl certify that the information included on this permit application form is to the best of my knowledge correct and that the project will be constructed in conformance with the approved plans that the required deed restrictions and protective covenants will be recorded and that the proposed project complies with the requirements of 15A NCAC 2H 1000 /7 1 4 � Signature Form SWU 101 Version 3 99 Page 4 of 4 Date 2/2-1/0 • + Michael C Gallant PE PA Eng n e ng / Cons It ng / Des gn NCDENR DWQ 127 Cardinal Dr Ext Wilmington NC 28403 Attn Chris Baker Environmental Engineer II Re Cypress Grove SW8 070226 Dear Cnris March 14 2007 In response to you comment letter dated March 12 2007 please find the following attached items 1 Corrected plans (2 copies) 2 A corrected Page 2 of the application 3 A check for $500 Please note that he plans have been changed to reflect vour comments as follows A The line type for the boundary has been changed to remove confusion with the wetlands line type B The square footage of each building is included on the first and last pages of the plans The note is below the finished floor elevation C The proposed contours have been cleaned up spot elevations have been added to the roads to indicate drainage direction D TI-c app t,a iG— page, u6 beG t u ie—dcu to �IIOw Llte iet,ctvitig stream as riarriSJnJ Creek C s"amp E The level spreader detail has been altered and enlarged to show a 2 pve weir across the end of the spreader If you have any questions please call me at 910 328 2188 Sm my ichael C allant PE gallantmc@yahoo corn tel 910 328 2188 fax 910 328 2230 P O Box 4039 Surf City NC 28445 4 Y March 12 2007 Jimmy Ellington Owner 14921 US Highway 17 Hampstead NC 28443 Subject Request for Additional Information Stormwater Project No SW8 070226 Cypress Grove Townhomes Pender County Dear Mr Ellington M ha I F Easley Go emor W II G Ross Jr Secretary North Ca of Depa intent of 1 n onme t d Nato at Resources Alan W KI mek P E Director Dt ision of W t Q a1 ty The Wilmington Regional Office received a Stormwater Management Permit Application for Cypress Grove Townhomes on February 26 2007 A preliminary review of that information has determined that the application is not complete The following information is needed to continue the stormwater review The wetlands boundary line type Is shown around the perimeter of the protect Is this correct? Please clarify 2 Please provide a detail of the proposed townhome footprint with dimensions for all footprints 3 Some of the design contours cross Please correct so that the stormwater drainage can be followed to the detention basin in which it will be treated Also provide adequate contours or spot elevations to show the drainage along the road being captured and treated 4 Our wetlands group has determined that the stormwater will drain to Harnsons Creek Please revise the permit application to reflect this data 5 Where the stormwater flows over the level spreader towards the wetlands a hardened material (concrete vinyl plastic) must be used so as to ensure even flow Because the application has significant permitting issues/deficiencies a resubmittal fee of $500 will be required in order for this project to remain in the express program Please note that this request for additional information is in response to a preliminary review The requested Information should be received by this Office prior to March 19 2007 or the application will be returned as incomplete The return of a protect will necessitate resubmittal of all required items including the application fee If you need additional time to submit the information please mall or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter The request must indicate the date by which you expect to submit the required information The construction of any impervious surfaces other than a construction entrance under an approved Sedimentation Erosion Control Plan is a violation of NCGS 143 215 1 and is subject to enforcement action pursuant to NCGS 143 215 6A N"0�I,Carolina �vatura!!!l North Ca ohna Di isio of Water Qual ty 1617 Mail Sery cc Cente R le gh NC 27699 1617 Pho (919) 733 7015 Customer Sery cc I t t wvw ncuate qua] ty rg Local o N 512 S I sb ry St Raleigh NC 27604 1 x (919) 733 2496 1 877 623 6748 An Equal Opportunity/Affirmative Action Employer 50A Recycled/10 / Post Consumer Paper 14. Jimmy Ellington Owner March 12 2007 Stormwater Application No SW8070226 Please reference the State assigned project number on all correspondence Any original documents that need to be revised have been sent to the engineer or agent All original documents must be returned or new originals must be provided Copies are not acceptable If you have any questions concerning this matter please feel free to call me at (910) 796 7304 Sincerely Chris Baker Environmental Engineer II ENB/csb S\WQS\STORMWATER\ADDINFO\2006\070226 mar07 cc Michael Gallant PE PA File Page 2 of 2