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HomeMy WebLinkAboutSW8050441_CURRENT PERMIT_20060104STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW C`l' 1S�JU I DOC TYPECURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE Z, WYYMMDD STORMWATER DIVISION CODING SHEET NCG PERMITS PERMIT NO. /v DOC TYPE ❑ HISTORICAL FILE ❑ MONITORING REPORTS DOC DATE ❑ YYYYMMDD I0F W A TFq Michael F. Easley, Governor O G William G. Ross, Jr., Secretary r North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of Water Quality January 4, 2006 Mr. Bobby R. Morton 1212 Decatur Road Jacksonville, NC 28540 Subject: Stormwater Permit No. SW8 050441 Bobby Morton Project High Density Project Onslow County Dear Mr. Morton: The Wilmington Regional Office received a complete Stormwater Management Permit Application for Bobby Morton Project on January 4, 2006. 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 050441 dated January 4, 2006, for the construction of the subject project. This permit shall be effective from the date of issuance until January 4, 2016, 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 sixty (60) 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) 796-7215. Sincerely, c22�c. Edward Beck Regional Supervisor Surface Water Protection Section ENB/arl: S:1WQSISTORMWATIPERMIT1050441.jan06 cc: David Newsom, P.E., Crystal Coast Engineering Onslow County Building Inspections Linda Lewis Wilmington Regional Office Central Files North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone (910) 796-7215 Customer Servicel-877-623-6748 Wilmington Regional Office Wilmington, NC 28405-3845 FAX (910) 350-2004 Internet: h2o.enr.state.nc.us One NorthCarolina An Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper Aaturally State Stormwater Management Systems Permit No. SW8 050441 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 Bobby Morton Bobby Morton Project NC 241258 at Hickory Road, Jacksonville, Onslow 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 "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 January 4, 2016, 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 on page 3 of this permit. The stormwater control has been designed to handle the runoff from 210,288 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. The built -upon area for the future development is limited to 5,000 square feet. 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. SW8 050441 0 The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, acres: 6.41 Onsite, ft : 279,253 Offsite, ft2: 0 b. Total Impervious Surfaces, ft2: 210,288 C. Design Storm, inches: 1 d. Pond Depth, feet: 6.0 e. TSS removal efficiency: 90% f. Permanent Pool Elevation, FMSL: 17.00 g. Permanent Pool Surface Area, ft2: 34,909 h. Permitted Storage Volume, ft3: 18,029 i. Temporary Storage Elevation, FMSL: 18.37 j. Controlling Orifice: 2.0"0 pipe k. Permitted Forebay Volume, ft3: 6,834 I. Receiving Stream/River Basin: UT Blue Creek 1 White Oak m. Stream Index Number: stream index number n. Classification of Water Body: "SC NSW" II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all 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 050441 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. 5. 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 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 118 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. 7. 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. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 11. The 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 050441 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 4th day of January 2006. NORT CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Alan W. 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 050441 Bobby Morton Project Stormwater Permit No. SW8 050441 Onslow Countv 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. SW8 050441 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 Onslow County Building Inspections Page 7 of 7 OFFICE USE ONLY Date Received Fee Paid Permit Number ,0 1.cl g DSD 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 ase as an original 1. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc, who owns the project): Bobbv R. Morton 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Bobby R. Morton 3. Mailing Address for person listed in item 2 above: 1212 Decatur Rd. City: Jacksonville state: N.C. Zip: 28540 Telephone Number: ( 910 ) 389-7519 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Bobby Morton Project 5. Location of Project (street address): NC 24/NC 258 at Hickory Rd. City: Jacksonville Township County: Onslow 6. [directions to project (from nearest major intersection): From int of US 17 and NC 24, west on NC 24 approx. 0.62 miles. Site is on right, just past Hickory Rd. 7. Latitude: 34" 45' 16" N Longitude: 770 27' 37" W S. Contact person who can answer questions about the project: Name: David K. Newsom, PE (Crystal Coast Engineering, PA) Telephone Number 11. PERMIT INFORMATION: 1. Specify whether project is (check one): X New Rcnewal Form SWU-101 Version 3.99 Page 1 of 4 of project 910 ) 325-0006 Modification r 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number NIA and its issue date (if kno%tm) NIA 3. Specify the type of project (check one): I_ow Density X 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 pennits can be obtained by contacting the Customer Service Center at 1-877-623-6748. Ill. PROJECT INFORMATION 1. In the space provided below. summarize 110W stormWater will be treated. Also attach a detailed narrative (one to two pages) describing stonnwater management for the project. Wet Detention Basin 2. Stormwater runoff from this project drains to the White Oak (New Ri 3, Total Project Area: 9.95 acres 4. Project Built Upon Area: 5. How many drainage areas does the project have'? 2 River basin. 48.5 % 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. -r12i;'�U rA e2 tl Tb ?6AJD IVnT TR u1 wriA-,ev -TU Po A ) Basin Information -Drainage Areal Drainage Area 2 Receiving Stream Name UT of Blue Creek UT of Blue Creek Receiving Stream Class SC;NSW SC;NSW Drainage Area 279,253 sf 154,169 sf Existing Impervious* Area -0- -0- Proposed Impervious*Area 210,288 sf -0- % Impervious* Area (total) 75.3% 0% Impervious* Surface -Area Drainage Area 1 Drainage Area 2 On -site Buildings 66,800 sf -0- On-site Streets 0- -0- On-site Parking 136,932 sf -0- On-site Sidewalks 1,435 sf -0- Other on -site 121 sf -0- 0 fsite Reserve for Future 5,000 sf -0- Total: 210,288 sf (4.83 ac) 1`otaL -0- * Impervious area is defined as tlee built upon area including, hest Plot limited to, huiddings, roads, parking areas, sidewalks, gravel areas, etc. Fonn SWtI-101 Version 3.99 Page 2 of'4 How was the off -site impervious area listed above derived? NIA 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 fnllotving covenants are intended to ensure ongoing compliance with .crate stormwater management permit number NIA as issued by the Division of l aler Quality. These covenants may not be changed or deleted without the consent of the .State. 2. No more them NIA square feet of any lot shall be covered by structures orirnpen,ious materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood decking or the ;voter surface of .swimming pools. 3. Swales shall not be filler! in, piped, or altered except as necessca.v 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 farm oulparcels or fixture development shall be directed into the permitted stormwater control s.vstem. These connections to the s•torrnivater control system .shall he performed in a manner that maintains the integrity and performance of the s.vstem as perrnitted. By your signature below, you certify that the recorded deed restrictions and protective covenants for (his 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 forms) listed below must be submitted for each BMP specified for this project. Contact the Stonnwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SWU-102 Wet Detenlion Basin Supplement Form SWU-103 Infiltration Basin Supplement Norm SWU-104 Low Density Supplement. Form SWU-105 Curb Outlet System Supplement Dorm SWU-106 Off -Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Meuse River Basin Supplement Form SWU-109 Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Pane 3 of 4 VI. SUBINUTTAI, 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. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initials • Original and one copy of the Stormwater Management Permit Application Form ZX&I- • One copy of the applicable Supplement Fortn(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 R date - Mean high water line - Dimensioned property/project boundary Location reap 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. AGEN'r 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): Crystal Coast Engineering, PA Mailing Address: 3817-3 Freedom Way City: Hubert Phone: [ 910 ) 325-0006 VIII. APPLICANT'S CERTIFICATION State: NC Zip:28539 Fax: ( 910 ) 325-0060 1, (print or type name of person lister! in General Information, item ?) Bobby R. Morton 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 Nvill be recorded, and that the proposed project complies with the requirements of 15A NCAC 21-1.1000, A R Signature: Form SVU-101 Version 3.99 Page 4 of 4 Date: Jul 08 05 1 1:15a Crystal Coast Engineering 910-325-0060 p.3 Permit No.15 tdE Li Oy-gl ;to be provided by DWC.•) State of North Carolina Depari:nient of Ei3virourneInt and Natural Resources Divisiou of NYater Qualit3, STORINW A �R MANAGEME1\ r PERMIT APPLICATIOf: FORM E ! WE I DETENTION WASIN SUPPLEMFNT This form n.uv bePhoracnpied for Ise as air originoi I DWQ Storniwater Manaaemtnt Plan Review: A complete stormwater manapgnent plan submittal!includcs an application fbn-n, a wet detention basir: supplement for each basJn, design calculations, and plans and specifi::ations shmw ng all barn and outlet strucr.:re details. i I. PROJECT INFOItMATIONT ! Project Name: Bcbby-tiiorton Contact Person: D-idx-Nt-soa Coast For wroiects with ipLultip le basins, � speci fy w1hieh elevations i Basin Bounm B? e-dat. on '- •0'� f.. PenT..•aar r Poot Elevarion f_. i Te,nporary Pool Elc atiori 3, ft. areas Permanent Pool L uwfacc Area 12,003 sq Drainage Area 16•41 ac lmpervious Area i 4.83 a� voiumes P.h Phone dumber: ( 910 ) 325-0006 bas n this worksneet appl4.es 10: 1 and oaly _ (f*r Of the basin) {devotion of the orifice) (e?evation or'rhe discharge structure over;7o-K) ft. 0"Cter sutl rl-e area at the oYrftCF ele."arion') (G1t-Site and of site drw:r.age to :he basin) (oi n-site and off site drainage ro 1he basin) Permanent Poel Voluine 34,909 cu. ft. ('combbned volivne of mair; basin andforebay} temporary Pool Vahame 113,029 cu. fr. (volume d:-raired above tne,lerrr,[rnerrr Forebay Volume 6,834 cu. f:_. (appr•oxima.ely 20% cf reral volume) Other Daralnerers S-iIDA t ,41713 (surface crew io draina e area r--tio from i33'Q :ajl�,' Diameter or'Orifice 2.00 in, {2 to 5 dot- ternppra►}�pcol dra.v-dortin regtcirea') Des],gn Rainfall o I 1 iu. Design `FSS Re-io a, z g0 % (�inirrs:rrn $S'f requir'd) j =orr S J-}G2 Rev 3.59 �I °1gz l 0 a 1 �lJul 08 05 11:15a Crystal Coast Engineering 910-325-0060 p.4 'ao�nntes: `Nhen ,.sit;g the Division SAiDA-ables, the con -cc; Sf1:'DA ratio for rennattent pool sizing s' ould be computed based upon the actual :rnpervioUs % and permanent pool depth! L?near ,n;crpD1ar:1on should lie employcd to dctcin:;nc the correct value for non- smaderd table em ies. In the 2C �cesta! tour -..es, -lic requirern._.nt fcr a;veeetarive fi'ter may ' e waived wet detention basic. is designed to, prove de SX% TSS removal. The NCDENR B%L W rnanua: provides design tables fo- both 35% TSS removal and 90% TSS removal. I I :I. REQUIRED ITEMS CHECKLIST � II Cie followMg checklist o-uthnes resign requirernen_s per the StormWate: Best Managvrnent Fract ces Manual N.C. DLpartment of Environment, HealI'.h�ard Natura3 Re;curces, Febr�.lary 1994) and Administrative Ccde kectica-. 15 A N- CAC 2H . MS. � ! I! I ni.tiai in `he space provided to indicate the follow ng design requirements have be= met and supporting iocurnentaticn is attached. If the applica. t has designated an agent in the Stonnwater Management Permit aFplic tic:! Form, :Ire agent may initial bel -,v. If a requirement has not been met, attach justification. kppl cauls ni.ials a. The permanent pool depth is between 3 and o feet (requited minimum of 3 fee,). b. The forebay volume .'.s ;approximately equal to 220% of the basin volume. c. The temporary pool controls runoff from the design storms event. ZkefZ d. The temporary pool draws down in 2 to 5 days. e. Ii required, a 30-foot vc getative filter is provided at the outlet (include :ion -erosive calculations) ., f. The basin length to ,yidtn ratio is greater than i 3: i . _ e. The basin side slopes above rho permanent pt�ol are no steeper Haan. 3:1. h. A submerged and vegeiatzd perimeter ;belf with a slope of 5:1 ar 'less (show cetzil}. _ +'U i. Vegetative cover above the permanent pool elevation is specified. ;. A t-rash rack t-ir similar device is provided forlboth the overflow and orifice. I I L_— k. A =ecardec drainage;easament is provided for each basin including access to nearest right- _ cf r�ay. j 1. If the basin is used forlsedhnent ar:d erasion control during construction, clean out of t'.-e hasia s specified p-or ,o use as a we- detention basin. m. A echaoisrn is specified which will drain the basin for maintenance or an emergency. I [11. NVET DETENTION BASIN OPERNiTION AND MAINTENANCE AGREEMENT I the wet retention b?.sin system is defines] is the wet detention basin, pretreatment including foreb4ys and the icg,etated filter if one is provided, I'his system (.check one) 0 does V2does es not ineorporate a vegetated filter at the outlet. This system (check aria) 0 does not incorporate pretreatme t other than a forebay. 'orTr, .5ti'i U-I oZ Rev 1,.,99 i j Page Z of 4 Jul 08 05 1.1:15a Ciystal Coast Engineering 910-325-0060 p.5 � i r I Ali Maintenance activitics shall be pe-formed as follows: 1. After every significant runoff producing rainfall event and Gt least monthly: ] !slaect the ,vet detention basin system for sediment accuinulation, erosion, trash accL=uNation, •tegetated cover, and general}condi_ion, f b. Check and : lear tl=e orifice of any obstructions such that. drawdown, of the temporary gaol occurs witlli,; 2 to 5 days as designed. 2. Reoaair eroded areas immediately, re -seed as tjccessury to Marnt2in good vegetative cover, m0u' z'egetat;ve cover to maintain. a maximum height of six inches, and re:no: ve trash as needed. 3. Iospect and repair $iaa collection system (i.e. catch basins; }piping, swales, riprap, e.c.) quanta-ly to maintain — proper functioning. 4. Remove accumulated sediment from the wet detentiarl basin system semi-annually or when depth is recuced to 75% of the origina design depth (see diagram belovr). Removed sediment shall be disposed of in an appropriate:-nanner and 5ha11. be handled in a manner that will not adversely impact water quality t;i,e. stockpiling gear a wet de(entioa basis: or stream, etc.). I The measuring devise used to determine the sediment elevation _hall be such that it will give an acc,irate depth reading and not readily �cnetrate into accumulated sediments. I I ulhen the pe-rnaneot pool depth reads 4.50 feet iL the,;; ain pond, & sediment shall be remove(-', I When the permanent pool depth reads 4.50 feet in the forebay, ibe sediment shall be removed. i I BASIN DIAGRAM (61i :"'-t' blan tsJ V Permanent Peel ] levalson 17.00 Sediment riC tloval F!. 12.50 7SI,'o Sediment Removal Elevation. 12.50 Bc[:o11: Elevatlon 11DO Z P/,--_—�--- ?5`�c Bottom Elevation 11 00 _ 25% :OREB!�Y 'vlA11J POND I 5. Remove cattails and other indigenous wetland plants "Vhen they cover -50% of the basin surface. These plants shall be encouraged to erow along the vegetated shclf and forebay berm. S. Ii the basin riusl be draiued:foz an emergency or to *rform" maintenance; the flushing at sediment t'M'o,ag'n �. the emergency drain shall be Mlat, •sized to the maxiii_um ex 'it practical. `cr=. S"VIJ-14Z Rcv 11.99 Page 3 of d i I ' JW 08 05 ' 1:16a Crystal Coast Engineering 910-325-0060 p.6 All c;)tuponAnts ot� the vreE cl �entiala basic system shall be r.�ain:a ced in aooG working order. I I I ac:lcr_ouriedge and agree by niv signature below tLat ] am responsible for the pei-fermance of the sevenmaintenance Procedures listed above. ; agree to notify DWQ of anv problems with the system or prior to any chaLges to the sys'.em or responsiMe party I pri n t Bobby R. MorT.on Title: Aderess: 1212 Decatur Rd. Ja Phone: 91,]-389-75 Si�ru_ure: Dam: J C S� Not"—: he tcgally responsiblc party sba� ld not oe a LoF-ieowrers asscciationt antess more ;han 50°lu of the. lots lave ;beer sold and . cs:de;a of die subdivision: has;been na=J the P_-Cs:dent. t, da A i a Notary Public For the Sta7e of Q C-�l Cour ty Of do hey ebv certify that Yersonaity appeased before me this I day of_ �U i �c.IS7 and acknowledge the due. execution of the =crgoing -,Yet detention basin maintenance requi ements. ltriess my band and o= tc.ial sea], ,���►►uirlrrJr� N PAZ) P � c C, PP t �cy,Cou N I px 63 ''��llrlttit»►�� SEAL My comrrussiea expires � f Form S',i U-102 R�zv 3.99 R Signa+ure- o-F Page 4 of 4 Jvtarj PL)W c.