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HomeMy WebLinkAboutSW7070311_CURRENT PERMIT_20070523STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW 7 -lad DOC TYPE 4,71) CURRENT PERMIT (❑ APPROVED PLANS ❑ HISTORICAL FILE 0 COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD l.�i-.O 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 DIVISION OF WATER QUALITY May 23, 2007 Southern Style Developers, LLC Attn: Mr. Rowland Bowen PO Drawer U New Bern, NC 28563 Subject: Stormwater Permit No: SW7070311 Villas at Creekside, New Bern High Density Stormwater Project Craven County Dear Mr. Bowen: The Washington Regional Office received a completed stormwater application and supporting information for the subject project on May 22, 2007. It has been determined that this project will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit SW7070311 dated May 23, 2007 to Southern Style Developers, LLC for the construction and operation of (3) wet detention ponds to serve the Villas at Creekside located off Old Airport Road near New Bern, NC. This permit shall be effective from the date of issuance until May 23, 2017, 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. North Carolina Division of Water Quality Internet: www.ncwateraualitv.ore 943 Washington Square Mall Phone (252) 946-6481 Washington, NC 27889 Fax (252) 946-9215 Nne orthCarohna NaNrallry An Equal Opportunity/Affirmative Action Employer— 50% Recycled110% Post Consumer Paper Southern Style Developers, LLC May 23, 2007 Page Two If you have any questions, or need additional information concerning this matter, please contact Bill Moore at (252) 948- 3919. incere y, A. Hodge ona1 Supervisor Surface Water Protection Section Washington Regional Office cc: Avolis Engineering City of New Bern Planning/Inspections Washington Regional Office Central Files J State Stormwater Management Systems Permit No. SW7070311 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 Southern Style Developers, LLC Craven County FOR THE construction, operation and maintenance of stormwater management systems 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 for grass swales, vegetated buffers and (3) wet detention ponds to serve the Villas at Creekside located off Old Airport Road near New Bern, NC. This permit shall be effective from the date of issuance until May 23, 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 on page 4 of this permit, the Project Data Sheet. 3. Approved plans and specifications for this, project are incorporated by reference and are enforceable parts of the permit. 3 DIVISION OF WATER QUALITY PROJECT DATA Project Name: Villas at Creekside Permit Number: SW7070311 Location: Craven County Applicant: Southern Style Developers, LLC Mailing Address: PO Drawer U New Bern, NC 28563 Application Date: 03/09/2007; original 05/22/2007; complete Receiving Stream: Brices Creek Stream Classification: C-NSW Total Site Area: 19.75 acres Total Impervious: 2.12 ac - Area 1 Area Allowed 1.80 ac - Area 2 1.18 ac - Area 3 Pond Depths: 5.0 ft Required Storage Volume: 9,985 cf - Basin 1 10,056 cf - Basin 2 6,192 cf - Basin 3 Provided Storage Volume: 9,985 cf - Basin 1 .10,056 cf - Basin 2 6,192 cf - Basin 3 Required Surface Area: 6,517 sf - Basin 1 5,780 sf - Basin 2 3,754 sf - Basin 3 Provided Surface Area: 8,373 sf - Basin 1 10,310 sf - Basin 2 6,585 sf - Basin 3 Controlling Orifice: 1.50-inch - Basin 1 1.50-inch - Basin 2 1.25-inch - Basin 3 2 4. No homeowner/lot owner/developer shall be allowed to fill in, alter, or pipe any vegetative practices (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. 5. The following items will require a modification to the permit: 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 of the project area. In addition, 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. II. SCHEDULE OF COMPLIANCE 1. The permittee will comply with the following schedule for construction and maintenance of the stormwater management system. a. 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 surfaces except roads. b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 2. The facilities must be properly maintained and operated at all times. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency including, but not limited to: 5 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 outlet structure, orifice device and catch basins and piping. 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. 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. 6. Upon completion of construction 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. Mail the Certification to the Washington Regional Office, 943 Washington Square Mall, Washington, North Carolina, 27889, attention Division of Water Quality. 7. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of five years from the date of the completion of construction. III. GENERAL CONDITIONS 1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee, 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. 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 143-215.6(a) to 143-215.6(c). 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) which have jurisdiction. 6 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 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. 6. At least six months prior to the expiration date, the permittee must submit a written request for permit renewal to the Division of Water Quality, Washington Regional Office. Permit issued this the 23 rd day of May, 2007. CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION For Alan W. Klimek, P.E. Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7070311 7 Stormwater Permit No. SW7070311 The Villas at Creekside - New Bern Swales, Vegetated Buffers, and Wet Ponds Craven County Designer's Certification 1, , 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, for (Project) (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. Signature Registration Number Date M At g'61t_�%,air.1 18 F. OFFICE USE ONLY Date Received Fee Paid Permit Number Q �1fl/�1ArnState of North Carolina `6WA K t1V , u A Elepartment of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may he photocopied for use as an original I. GENERAL INFORMATION L Applicants name (specify the name of the corporation, individual, etc. who owns the project): Southern Style Developers LLC 2. Print Owner/Signing Official's name and title (person legally responsible for facility,and compliance): Rowland Bowen, Member/Manager 3. Mailing Address for person listed in item 2 above: P.O. Drawer U City: New Bern State: NC Zip: 28563 Telephone Number: I_ 252 ) 658-0 S 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Villas at Creekside, New Bern, North Carolina 5. Location of Project (street address): See vicinity map. City: New Bern County: Craven 6. Directions to project (from nearest major intersection): 7. Latitude: N35°-3.437' Longitude: W77°-2.736' of project 8. Contact person who can answer questions about the project: Name: Kevin Avolis, P.E. Telephone Number: ( 252 )633-0068 II. PERMIT INFORMATION: 1. Specify whether project is (check one): X New Renewal Modification Form SWU-101 Version 3.99 Page I 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) 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 XSedimentation/Erosion Control X404/401 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 I. 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 . See attached. 2. Stormwater runoff from this project drains to the Neuse River basin. 3. Total Project Area: 19.748 acres 4. Project Built Upon Area: 25 RA 5. How many drainage areas does the project have? 5 (3 Primary/2 Fringe) 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. Basin Information Drainage Area I Drainage Area 2 Receiving Stream Name Brices Creek Receiving Stream Class C, Sw, NSW Brices Creek Drainage Area C Sw NSW Existing Impervious Area 5.56 AC 0 6.60 AC Proposed Impervious'Area 92 416 SF 2.12 AC 0 78 487 %Impervious' Area (total) 38. 2$ AF 1 80 27 3� Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings 47,616 SF On -site Streets 29 752 SF On -site Parking 23 343 SF 32,612 SF On -site Sidewalks 3 020 18,437 SF 8 SF Other on -site ------ SF 7 83 183 SF Off-site _ ----- — :92,4T12.12 AC Total: 78 487 SF 1 AC .80 --- ---- .,,� ° „, spun area mouamg, out not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form SWU-101 Version 3.99 Page 2 of Z, 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) 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 XSedimentation/Erosion Control X 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 project . See attached_ ' 2. Stormvater runoff from this project drains to the Neuse River basin. 3. Total Project Area: 19.748 acres 4. Project Built Upon Area: 25.88 5. How many drainage areas does the project have? 5 (3 primary/2 Fringe) 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. Continued Basin Information Drainage Area; Receiving Stream Name Brices Creek Fri Brices Creek Receiving Stream Class C SW, NSW C SW, NSW Drainage Area 3.78 AC 3.81 AC Existing Impervious* Area 0 Proposed Impervious Area 51,542 SF 1 18 AC 0 % Impervious* Area (total) 31 .2$ Total Site Brices Creek C, Sw, NSW 19.748 AC 0 5.11 AC 25.88% Impervious' Surface Area On -site Buildings On -site Streets On -site Parking 18 432 20,522 7,840 Drainage Area, SF SF SF Frincle A & B 0 0 0 Total Site 95 800 SF 76 477 SF On -site Sidewalks Other on -site Off -site 4 748 ------ SF 0 0 29 800 SF 20 368 SF 0 Total: 51 , 542 SF 1.18 AC Total: 0 222,445 SF 5.1 .u,pa, vnuu� area is aennea as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form SWU-101 Version 3.99 Page 2 of 4 1 AC 7. How was the off -site impervious area listed above 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. I. The following covenants are intended to ensure ongoing compliance with state stormwater 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 222,449 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. Shales shall not be filled in, piped, or alzrc-d 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 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 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 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. I. 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 Stortnwater Management Permit Application Form I , nitials One copy of the applicable Supplement Form(s) for each BMP V 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): Avolis Enclineering P.A. Mailing Address:__ P.O. Box 15564 Citv: New Bern Phone:( 252 1 633-0068 VIII. APPLICANT'S CERTIFICATION State: NC Zip: 28561 Fax: ( 252 ) 633-6507 1. (print or type name of person listed in General Information, item 2) Rowland Bowen 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 wirh 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., 2- G-c3 Roland Bowen, Metnber/Manager Form SWU-101 Version 3.99 Page 4 of 4 POND #1 Pennit No. (to be provided by D111Q) 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 ror use as an original DWQ Stormwater Management Plan Review: A complete stormwater management plan submittal includes an application form, a wet detention basin ;upplement for each basin, design calculations, and plans and specifications showing all basin and outlet ructure details. PROJECT INFORMATION 'roject Name: Villas at Creekside ontact Person: Rowland Bowen Phone Number: ( 252 ) 658-0253 or projects with multiple basins, specify which basin this tcorksheet applies to: Drainage Basin #1 — Pond #1 1, rations :;asin Bottom Elevation '_nnanent Pool Elevation =mporary Pool Elevation 0 ft. 5.0 ft. 6.1 ft (floor of the hasin) (elevation of the orifice) (C1e1'alian Of the discharge.cn-uccnu-e overflow) ,eas 'ermanent Pool Surface Area 81373 sq. ft. (uatersroface area at the orifice elevation) 172ina2e Area 5.56 ac. (on -site and off -site drainage to the basin) mpen ious Area 2.12 ac. (on -sire and off -site drainage to the basin) plumes ermanent Pool Volume 19, 082 cu. ft. (combined volume of main basin and foreboy) emporary Pool Volume 91985 cu. ft. (Volume detained above the pernrarrent pool) orebay Volume 31900 cu. ft. (approsnnately 20% of total volume) ,'her parmneters JDAI "ameter of Orifice =sign Rainfall estgn TSS Removal '- 2.69 1.5 in. 1 in. 90 (sin face area io drainage area ratio from D ii'O table) (2 to d day temporary pool drain -down required) (minimum 85% required) •= S%VU-102 Rev 3.99 Pave I of 4 Footnotes: l 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. '- In the 20 coastal counties, the requirement for a veectative filter may be waived if the wet detention basin is designed to provide 90%TSS removal. The NCDENR BMP manual provides dcsien tables for both 85% TSS removal and 9006 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 :'.ocumentation is attached. If the applicant has desienated an agent in the Stormwater Management Permit ;.pplication 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). 11 b. The for -bay volume is approximately equal to 20% of the basin volume. c. The temporary pool controls runoff from the design storm event. _-49_ d. The temporan pool draws dos%n in 2 to 5 days. 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 ureater than 3:1. Q. The basin side slopes above the permanent pool are no steeper than 3: 1. f h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). 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. I. 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. H. R'ET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT he wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the egetated filter if one is provided. -his system (check one) XDUM adoes not incorporate a vegetated filter at the outlet. -his system (checkone) &dM Rdoes not incorporate pretreatment other than a forebay. ,rmSWU-102 Rev399 Paac2of4 Maintenance activities shall be performed as follows: After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention basin system for sediment accumulation, 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 necessary to 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 3.75 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 3.75 feet in the forebay. the sediment shall be removed. BASIN DIAGRAM !fill in the blanks/ p Permanent Pool Elevation 5 0 Sediment Re oval El. 1 .25 75 .; - ------- BonomEle 0.0 1 Sediment Removal Elevation 1 ' 25 175% ------------------------------ --------- anon % 0 0 Bottom Elevation y 259% FOREBAY MAIN POND 5. Remove cattails and other indigenous wetland plants when they'cover 50% of the basin surface. These plants shall 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. Form SWU-102 Rev 3.99 Pace 3 of 4 7. All components of the wet detention basin system shall be maintained in good working order. 1 acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance procedures listed above. 1 agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible parry. Print name: Rowland Bowen Title: Member/Manager — Southern Style Developers, LLC Address:—P.O. Drawer U, New Bern, NC 28563 252-658-0253 Date:, NOte: The lecally responsible party should not be a homeo+cncrs association unless more than 5V° of the lots ha%e been sold and a resident of the subdixision has been named the president. I. Beth Simmons . a Notary Public for the State of North Carolina CoumN of Craven do hereby certify that Rowland Bowen personally appeared before me this l day of �— ( �t 7�o i , and ackno%\ ledge the due execution of the forgoing ��ei detention basin maintenance requirements. Witness my hand and official seal. SEAL \4y commission expires April 22 2009 Form SWU-102 Rev 3.99 Page 4 of 4 Q rr i YF,W!c14 oijauq O r9 w POND #2 Pennit No. (to be provided br DIYQ) 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 DVdO 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. I. PROJECT INFORMATION Project Name: Villas at Creekside Contact Person: Rowland Bowen Phone Number: ( 252 ) 658-0253 For projects with multiple basins, specify which basin this worksheet applies to: Drainage Basin #2 — Pond #2 elevations Basin Bottom Elevation 0.0 ft. (floor of the hash?) Permanent Pool Elevation 5.0 ft. (elevation of the orifice) Temporary Pool Elevation 6.0 ft. (elevation of the discharge sn ucna e averflo)r) ;; rcas Permanent Pool Surface Area 10,310 sq. ft. (tvatersutface area at the orifice elevatioat) Drainage Area 6.60 ac. (on -site and off -site drainage to the basin) mpen-ious Area 1.80 ac. (on -site and off -site drainage to the basin) volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume Other parameters SA/DAI Diameter of Orifice Design Rainfall Design TSS Removal '- Form S14'U-102 Rev 3.99 29.851 cu. ft. (combined volume of main basin and forebay) 10,056 cu. ft. (volume detained above the permanent pool) 6 200 cu. ft. (approximately 20% of total volume) 2.01 (surface area (o drainage area ratio fi-om DIi7O table) 1.5 in. (2 to 5 day temporary pool drain -down required) 1 in. 90 % (mininuan 85% required) Page I of 4 ootnotcs: 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. Lincar 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 S5% TSS removal and 9056 TSS removal. L REQUIRED ITEMS CHECKLIST he following checklist outlines design requirements per the Stormwater Best Management Practices Manual �.C. Department of Environment, Health and Natural Resources,. February 1999) and Administrative Code _coon: 15 A NCAC 2H .1008. .itial in the space provided to indicate the following design requirements have been met and supposing :-cumentation is attached. If the applicant has desifmated an agent in the Stormwater Management Permit plication Form, the agent may initial below. If a requirement has not been met, attach justification. -plicants Initials l' a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). b. The forebay volume is approsimalely equal to 20% of the basin volume. / C. The temporary pool controls runoff from the deSi-Qn Storm e\ ent. —_ d. The temporary pool draws down in 2 to 5 days. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive lio%y calculations) —Z f Tie basin length to width ratio is gealer than -,:1. g. The basin side slopes above the pe„sanest 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. \'egetafice cover above the permanent pool elevation is specified. --,�_ j. A rash rack or similar device is provided for both the overf7oty and orifice. —�_ k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. I. 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. V in. A mechanism is specified which will drain the basin for maintenance or an emer.aency. NVET DETENTION BASIN OPER4TION AND MAINTENANCE AGREEMENT ',vet detention basin system is defined as the wet detention basin, pretreatment including forebays and the etated filter if one is provided. s system (check one) $does not incorporate a vegetated filter at the outlet. .s system (checkone) XMM Rdoes not incorporate pretreatment other than a forebay. SWU•102 Rev3.99 Page 2 of 4 Maintenance activities shall be performed as follows: After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention basin system for sediment accumulation, 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. 3. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 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 meet 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 3.75 feet in the main pond. the sediment shall be removed. When the permanent pool depth reads 3.75 feet in the forebay. the sediment shall be removed. BASIN' DIAGRAM (fill in the blauAs) 7 Permanent Pool Etc\ation 5.0 I Sediment Re oval El. 1 .25 75 0 1':25 ------- --- - /0 Sediment Removal Elevation I 75"'0 Bonom Etc -ation 0 , °---------------------------------------------�1 ------ Bottom Elevation 0 ♦ 25% FOREBAY MAIN POND 5• Remove cattails and other indigenous wetland plants when th`ey'cover 50% of the basin surface. These plants shall 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. Form SWU-102 Rev 3.99 Page 3 of 4 i. All components of the wet detention basin system shall be maintained in good working order. I acknowledge 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. Print name: Rowland Bowen Title: Member/Manager - Southern Style Developers, LLC Address: P.O. Drawer U, New Bern, NC 28563 252-658- Date: 2 - K - C"7 Note: The Ie_allp responsible party should not be a homeowners association unless more than 50'n of the lots have been sold and a resident ofthe subdivision has been named the president. Simmons . a Notary Public for the State of North Carolina County of Craven do hereby c-niN that Rowland Bowen personally appeared before me this l9 day of C--U -LaM X-1, and ackno%s'ledge the due execution of [he forgoing wet detention basin maintenance requirements. Witness my hand and official sea]. 6�. SI NOTARY PUBLIC SEAL Nly commission expires April 22 2009 Form SWU-102 Rev 3.99 Paee 4 of 4 POND #3 Pennit No. (to be provided by DIVA) 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 DWO 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. I. PROJECT 1NFOIL1fAT10N Project Name: Villas at (xeekside Contact Person: Rowland Bowen Phone Number: ( 252 ) 658-0253 For projects with multiple basins, specify which basin this svorksheet applies to: Drainage Basin #3 — Pond #3 elevations Basin Bottom Elevation 0 ft Permanent Pool Elevation 5.0 ft. Temporary Pool Elevation 6.0 ft. :u cas Permanent Pool Surface Area 6,585 sq. ft. Drainage Area 3.78 ac. lm pen iousArea 1.18 ac. (floor of the basin) (elevation of the orifice) (elevation of the discharge structure orerJlow) Grater surface area at the orifice eler01i017) (on -size and off -site drainage to the basin) (on -she and off -sire drainage to the basin) vohanes Permanent Pool Volume 16.399 cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 61192 cu. ft. (volume detained above the permanent pool) Forebay Volume 3,300 cu. ft. (approsimatelV 20% of total V0111777e) Other parameters SAJDA 2. 28 (sul f ce area io drainage area ratio f7•on7 D 1V0 table) Diameter of Orifice 1.25 in. (2 to 5 day tempormy pool draw -down required) Design Rainfall 1 in Design TSS Removal -' 90 % /o (mininnnn 85% required) Form SWU-102 Rev 3.99 Pave I of 4 oomoles: When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the actual impervious /o 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 uaived 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. 1. REQUIRED ITEDIS CHECKLIST he following checklist outlines design requirements per the Stormwater Best Management Practices Manual �.C. Department of Environment, Health and Natural Resources,. February 1999) and Administrative Code cction: 15 A NCAC 2H .1008. .itial in the space provided to indicate the following design requirements have been met and supporting cumentauon is attached'. If the applicant has designated an agent in the Storm%vater Management Permit ?placation Form, the agent may initial below. if requirement has not been met, attach justification. _olicants Initials g' a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). b. The forebay volume is approximately equal to 20% of the basin volume. 0 c. The temporary pool controls runoff from the design storm event. d. The temporary pool draws down in 2 to 5 days. If required, a 30-foot re^etaiive filter is provided at the outlet (include non -erosive flow calculations) Z/ f. The basin length to widlh Fazio is treater than 3: 1. ^_. The basin side slopes above the permanent pool are no steeper than 3: 1 . h. A submerged and vegetated perimeter shelfwith a slope of 6: I or legs (show detail). Vegezative cot er above the permanent pool eIt%alion is specified. -�� j. A trash rack or similar device is provided for both the overflow and orifice. n. .- recorded drat age easement is provided for each basin including access to nearest right- of-way. I. 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. WET DETENTION BASIN OPERATION AND NLAINTENANCE AGREEMENT wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the etated filter if one is provided. s system (check one) ]fig $does not incorporate a vegetated filter at the outlet. 's system (check one) XDdM Rdoes not incorporate pretreatment other than a forebay. .1 SWU-102 Rev 3.99 Fagg 2 of 4 Maintenance activities shall be performed as follows: After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention basin system for sediment accumulation, 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 necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. Inspect and repair the colfection system (i.e. catch basins, piping, wales, 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 rut ill 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 eive an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 3.75 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 3.75 feet in the forebay. the scdinment shall be removed. BASIN DIAGRAM (fill in the blanks) p Permanent Pool Elevation 5 0 Sediment Re oval El. 1 .25 75 5 ------- ---� Sediment Removal Elevation 1.25 17m,p o. Bonom Ele 'anon 0 +� %----------------------------------------) ----- Bonom Elevation 0 y 25% FOREBAY MAIN POND 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These plants shall 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. Form S),VU-102 Rev 3.99 Page 3 of 4 i. All components of the wet detention basin system shall be maintained in good working order. I acknowledge 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. Print name: Rowland Bowen Title: Member/Manager — Southern Style Developers, LLC Address: P.O. Drawer U, New Bern, NC 28563 Date: Note: The lecally responsible pan), should not be a homco,cners association unless more than �0°0 of the lots have been sold and a resident of the subdivision has been named the president. 1. Beth Simmons . a Votary Public for the State of North Carolina Counp of Craven do hereby certify that Rowland Bowen ersonall} appeared before me this day of r�j. ".O-7 ,and acknowledge the due execution of the forgoing. icet detention basin maintenance requirements. Witness my hand and official seal. O,Ltp NOTARY PUBLIC SEA MY commission expires April 22 2009 FormSWU•102 Rev3.99 Paee4of4 STORMWATER NARRATIVE Villas at Creekside - A Planned Unit Development New Bern, North Carolina The Villas at Creekside project entails the development of 60 residential lots on 19.748 acres of land located off of U.S. Highway 70 in New Bern, Craven County, North Carolina. An access road will be constructed off of existing subdivision roads in the area. Sixty lots, a public road system and public utilities system will be constructed within the subdivision. The project is being developed to an overall density of'25.88%. An engineered stormwater system is proposed to comply with the Coastal Stormwater Regulations and the City of New Bern Stormwater Permitting Requirements. The project has been designed to divide the property into three distinct drainage basins. A stormwater retention pond is proposed for each drainage basin. Drainage Basin No. I will discharge to Stormwater Retention Pond No. 1. Drainage Basin No. 2 will discharge to Stormwater Retention Pond No. 2. Drainage Basin No. 3 discharges to Pond No. 3. All stormwater retention ponds discharge through an outlet structures to the low lying wetland areas located on the subject property. Each drainage basin for the project is discussed in detail below as is the details of each stormwater retention pond: Drainage Basin No. 1 Drainage Basin No. I is located on the eastern side of the subject property. This drainage basin is delineated on the project plans and covers a total area of 242,120 SF, 5.56 acres. All runotPwithin this drainage basin discharges to Stormwater Retention Pond No. 1. All runoff is routed to the forebay end of the stormwater retention pond. The stormwater retention pond is designed for 90% TSS removal. Stormwater Retention Pond No. I fully contains the I -inch design volume for Drainage Basin No. I. Drainage Basin No. 2 Drainage Basin No. 2 covers the central portion of the subject property and covers a total area of 287,424 SF, 6.60 acres. All stormwater runoff from this drainage basin discharges to the forebay areas of Stormwater Retention Pond No. 2. Stormwater Retention Pond No. 2 is sized for 90% TSS removal. The stormwater retention pond is sized to fully contain the 1-inch design volume from Drainage Basin No. 2. Stormwater Retention Drainage Basin No. 3 covers a total of 164,799 SF, 3.78 Pond No. 3 acres. All stormwater runoff from this basin discharges to Pond No. 3 Stormwater Retention Pond No. 3 was sized far 90% TSS removal and will fully contain the I -inch design storm. Fringe Drainage Fringe Drainage Basins A & B cover a total area of Basin A & B 165,895 SF, 3.81 acres. These areas represent the low lying wetland areas on the site. No development will occur in these areas. The runoff in these fringe areas are not proposed to be treated in any manner. The proposed stormwater management system for the project fully complies with the Coastal Stormwater Regulations and the City of New Bern Stormwater Regulations. Specifically, the proposed devices provide the total nitrogen removal and now control measures needed to develop the project in accordance with the City of New Bern Stormwater Permitting Requirements and the Coastal Stormwater Permitting Requirements. } AVOLIS ENGINEERING, P.A. Z� P.O. Box 15564 • New Bern, North Carolina 28561 • (252) 633-6 RMCEIvEiD February 1, 2007 MAR p 9 2007 Mr. Al Hodge Environmental Engineer NCDENR - Water Quality Section 943 Washington Square Mall Washington, NC 27889 RE: Villas at Creekside - A Planned Unit Development New Bern, Craven County, North Carolina AE Project No. 06038 Dcar AI: QWQ-WARD Enclosed please find the following for the above -referenced project for your review and approval: • Stormwater Permit (Original and One Copy) A • Project Plans (2 Copies) • Stormwater Calculations (2 Copies) • $420 Permit Fee It is requested that you review the permit package at your earliest convenience. Should you have any questions relating to this matter or need any additional information, please do not hesitate to call. Sincerely, i Avolis, P.E. President AVOLIS ENGINEERING, P.A. P.O. Box 15564 • New Bern, North Carolina 28561 • (252) 633-0068 March 5, 2007 Mr. Roger Thorpe Environmental Engineer Surface Water Protection Washington Regional Office NCDENR - Division of Water Quality 943 Washington Square Mall Washington, NC 27889 RE: Stormwater Application Villas at Creekside New Bern, Craven County, North Carolina AE Project No. 06038 Dear Roger: Enclosed please find the Soils Report for the referenced project. RECEIVED Please continue with your review of the Stornr\vater Permit for this project. Sincerely, i Avolis, P.E. President 11Ai7l, 06 2007 ®WQ-WARO aS mil/ C2aCSiQc� :,y 15738�%�'1� / !'�Z - ��-C G� Cd�✓9G✓1� C� / ^-� ,/'2�. �/1+� . _.,' Kt�. Gib QyJ� .. i / c1 tso r //J -17 /O ��" l/� c•� G/(e�iyi� 6roUkQ'�c sc. �a�rti: AO SanaC,. e(c��J �ar•s G.. ir. I�tot/,�s h. I o G rv, Sc +cQ 1'� Sc v,.GCK l4a rti W �oGrS¢. Sls PE12-PNAS-A-f3lL�rr, P9v M/ /! Q ..:4.le- . • D. _ /W/f//L . L Michael P. Easley, Governor )� William G. Ross Jr, Secretary r North Carolina Department of Environment and Natural Resources —i � Alan W. Klimek, P.F. Director Division of Water Quality February 20, 2007 Southern Style Developers, LLC Attn: Rowland Bowen PO Drawer U New Bern, NC 28563 SUBJECT: Stormwater Application for Villas at Creekside Dear Mr. Bowen: This office received a stormwater permit application for the subject project on February 16, 2007. A preliminary review of your project indicates that the application package is incomplete. The following items are needed to make the package complete: $420 check signature by owner on page 4 of application 2 sets of plans _ narrative supplement (wet detention, infiltration basin, system, underground infiltration trench) _ signature by owner on supplement form L/ soils report low density, curb outlet system, off -site We are returning the entire package to you. Once the package is complete you may resubmit. You should also be aware that the Stormwater Rules require that a permit be issued prior to any development activity. Construction without a permit is a violation of 15A NCAC 2h.1000 and North Carolina General Statute 143-215.1 and may result in civil penalties of up to $10,000 per day. If you have any questions, please feel free to contact me at (252) 948-3923. Sincerely, og r horpc2En`vironmental Engineer Surface Water Protection Washington Regional Office cc: Avolis Engineering, P.A. WaRO North Carolina Division of Water Quality Internet: www.ncwaterguality.org 943 Washington Square Mall Phone (252) 946-6481 Washington, NC 27889 Pae (252) 946-9215 NorthCarolina Naturally An Equal Opportunity/Affirmative Action Employer— 50% Recycledl10 % Post Consumer Paper Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources 'w�v� j o .� February 20, 2007 Southern Style Developers, LLC Attn: Rowland Bowen PO Drawer U New Bern, NC 28563 Alan W. Klimek, P.E. Director Division of Water Quality SUBJECT: Stormwater Application for Villas at Creekside Dear Mr. Bowen: This office received a stormwater permit application for the subject project on February 16, 2007. A preliminary review of your project indicates that the application package is incomplete. The following items are needed to make the package complete: _ $420 check signature by owner on page 4 of application _ 2 sets of plans _ narrative _ supplement (wet detention, infiltration basin system, underground infiltration trench) signature by owner on supplement form soils report low density, curb outlet system, off -site We are returning the entire package to you. Once the package is complete you may resubmit. You should also be aware that the Stormwater Rules require that a permit be issued prior to any development activity. Construction without a permit is a violation of 15A NCAC 2h.1000 and North Carolina General Statute 143-215.1 and may result in civil penalties of up to $10,000 per day. If you have any questions, please feel free to contact me at (252) 948-3923. Sincerely, og r horp , Environmental Engineer Surface Water Protection Washington Regional Office cc: Avolis Engineering, P.A. ,,V�aRO North Carolina Division of Water Quality Internet: www.ncwateraualiw.org One 1 943 Washington Square Mall Phone (252) 946-6481 No Carolma Washington, NC 27889 Pa< (252) 946-9215 Naturally An Equal Opportunity/Affirmative Action Employer- 50%Recycled110% Post Consumer Paper SOUTHERN STYLE DEVELOPERS LLC F.D. BOX 14011 NEW BERN, NC 28560 PAY O THE OF - /t/ L DFN /L ORDER J /'0 I= TAM SM W NPON S 1010 6&1121531 / BPmM olw' DATE Z-cD -[)7 $ 9zo 00 FOR S�lpr,,,/ •000 LOiO O1• I:053101l 11. 00005295681502u• - ---_=