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HomeMy WebLinkAboutSW8010425_HISTORICAL FILE_20050804 STORMWATER DIVISION CODING SHEET POST-CONSTRUCTION PERMITS PERMIT NO. SW8 61Aa5 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE gar of Oy YYYYMMDD �QF WATF,o Michael F. Easley, Governor �O G William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Y Alan W. Klimek, P.E. Director Division of Water Quality August 4, 2005 Mr. Keith D. Walker, President East Carolina Community Development, Inc. 315 Turner Street Beaufort, NC 28516 Subject: Stormwater Permit No. SW8 010425 Modification Phoenix Park Phase 1 and 2 High Density Project Onslow County Dear Mr. Walker: The Wilmington Regional Office received a complete Stormwater Management Permit Application for Phoenix Park Phase 1 and 2 on August 4, 2005. 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 010425 Modification dated August 4, 2005, for the construction of the subject project. This permit shall be effective from the date of issuance until August 4, 2015, 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 150E 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 Robert Gordon, or me at (910) 796-7215. Sincerely,-' Edward Beck Regional Supervisor Surface Water Protection Section ENB/rdg: S:\WQS\STORMWAT\PERMIT\010425mod.aug05 cc: David Newsom, PE, Crystal Coast Engineering Mike Morris, Onslow County Building Inspections Robert Gordon Wilmington Regional Office Central Files North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone(910)796-7215 Customer Services-877-623-6748 One Wilmington Regional Office Wilmington,NC 28405-3845 FAX (910)350-2004 Internet h2o.encstate.nc.us NOrCI1C3I'O/I/IDB An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper Natfurall(/ ' State Stormwater Management Systems Permit No. SW8 010425 Modification 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 Mr. Keith D. Walker & East Carolina Community Development, Inc. Phoenix Park Phase 1 and 2 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 August 4, 2015, 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 wet pond in Phase 1 has been designed to handle the runoff from 91,155 square feet of impervious area. The wet pond in Phase 2 has been designed to handle the runoff from 109,762 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 draining to the wet pond in phase 2 is limited to 5,675 square feet. There is no additional built-upon area available for future development in phase 1 . 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. Page 2 of 8 State Stormwater Management Systems Permit No. SW8 010425 Modification 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. 6. The following design criteria have been provided in the following wet detention ponds and must be maintained at design condition: Unit` Phase-1 Pond, *Phase 2 Pohd- Drainage Area 261,360 187,954 Onsite ft2 261,360 187,954 Offsite 0 0 Total Impervious Surfaces 91 ,155 109,762 On-site buildings 32,447 35,069 On-site parking ft2 50,108 57,815 On-site sidewalks 8,600 11 ,203 On-site future 0 5,675 Off-site 0 0 Pond Depth feet 6.0 5.0 TSS removal efficiency % 90 90 Design Storm inches 1 1 Permanent Pool Elevation FMSL 39.48 40.7 Permitted Surface Area @PP ft2 4,830 8,200 Permitted Storage Volume ft3 7,930 9,100 Storage Elevation FMSL 40.91 41.73 Controlling Orifice "0 pipe 1.0 1.5 Permanent Pool Volume ft3 11 ,380 21 ,844 Forebay Volume ft3 2,980 4,690 Maximum Fountain Horsepower hp 1/8 1/8 Receiving Stream ;�� ' �,,, `: UT of New River River Basin White Oak Stream Index Number 19 (11) Classification of Water Body SC;HQW,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. Page 3 of 8 State Stormwater Management Systems Permit No. SW8 010425 Modification 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. 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 either 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. 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. Page 4 of 8 State Stormwater Management Systems Permit No. SW8 010425 Modification 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. 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 1. 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. Page 5 of 8 State Stormwater Management Systems Permit No. SW8 010425 Modification 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 4`h day of August, 2005. NORTH ROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Page 6 of 8 State Stormwater Management Systems Permit No. SW8 010425 Modification Phoenix Park Phase 1 and 2 Stormwater Permit No. SW8 010425 Modification Onslow County Designer's Certification I, as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: SEAL Signature Registration Number Date Page 7 of 8 State Stormwater Management Systems Permit No. SW8 010425 Modification 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 Mike Morris, Onslow County Building Inspections Page 8 of 8 OFFICE USE ONLY Date Received Fee Paid Permit um er - A DOD . 0 u3 (51 SVT ON 04 State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form mqv 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): East Carolina Community Development,Inc. 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Keith D. Walker,President 3. Mailing Address for person listed in item 2 above: 315 Turner St. City:Beaufort State:NC Zip:28516 Telephone Number: ( 252 ) 504-5424 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Phoenix Park(Phase I and Phase B) 5. Location of Project (street address): Gum Branch Rd,between its intersection with Henderson Drive&its intersection with Western Blvd. Ext. City,Jacksonville County:Onslow 6. Directions to project (from nearest major intersection): From intersection of NC 24 &US 17, north on US 17 approx. 2.8 miles to Gum Branch Rd. Left on Gum Branch Rd. Site is approximately 2.4 miles on right. 7. Latitude: 340 47 36"N Longitude: 770 26'6" W of project 8. Contact person who can answer questions about the project: Name:David K.Newsom,PE (Crystal Coast Engineering,PA) Telephone Number: ( 910 ) 325-0006 11. PERNIIT INFORMATION: 1. Specify whether project is (check one): New Renewal X Modification Form SWU-101 Version 3.99 Page 1 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 SW8 010425 and its issue date (if known) Oct.9,2001 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 X Sedimentation/E..rosion Control _404/401 Permit NPDF.S Stormvater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Adding 2,500 sf of parking surface(roadway)to Pond 1. Pond 1 design/permit can accommodate the additional impervious surface. Pond 2 is intended to treat stormwater from Phase❑. 2. Stormwater runoff front this project drains to the White Oak River basin. 3. Total Project Area: 10.31 acres 4. Project Built Upon Area: 44.72 % 5. How many drainage areas does the project have? 2 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 Areal 'Drainage Area 2 Receiving Stream Name UT of New River UT of New River Receiving Stream Claus C;NSW C;NSW Drainage.Area 261,360 sf (6.00 ac) 187,954 sf (4.31 ac) Existing Impervious* Area 88,655 sf(2.04 ac) -0- Proposed Impervious*Area 2,500 sf (0.06 ac) 109,762 sf(2.52 ac) Rb Impervious* Area(total) 34.88% 58.40% 161pervious*tSurface Area t._ Drainage Area 1 - Drainage Area 2 On-site Buildings 32,447 sf existing 35,069 sf On-site Streets -0- -0- On-site Parking 47,608 sfexisting/2,500 sf proposed 57,815 sf On-site Sidewalks 8,600 sf existing 11,203 sf Other on-site (future reserve) -0- 5,675 sf 0 t-site 0- 0- Total: 91,155 sf (2.09 ac) Total: 109,762 sf (2.52 ac) *Impervious area is defined as the built upon area including. but not limited to, buildings, roads,parking areas, sidetralks,grnret areas. eic. �L� Porn SWU-101 Version 3.99 Page 2 o1 4 RECFJXF. � AUG 0 4 2005 BY: 7. Flow 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 following covenants are intended to ensure ongoing compliance with state stormvater management permit number as issued by the Division of lValer Quality. These covenants may not be changed or deleted without the consent of the Slate. 2. .No more than square feet of any lot shall be covered fir 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. Stales 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 stale stormwater management permit modification prior to construction. 5. .411 permitted runoff from outparcels or frtur•e development shall be directed into the permitted slormnvater 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 certifv 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 pantries 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 foams. 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 Ott-Site System Supplement Form SWU-107 Underground Infiltration"french 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 nest to each item. Initials •Original and one copy of the Stormwatcr Management Permit Application Form a;LJG4U •One copy of the applicable Supplement Form(s) for each BMP T7Ki1J •Permit application processing fee of S420(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 Boor 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, nrnoff calculations -Drainage areas delineated -Vegetated buffers(where required) VII.AGENT AUTHORIZATION If you wish to designate authority to another individual or Gnn so that they may provide information on your behalf,please complete this section. Designated agent(individual or firm): John L. Pierce & Associates P-A- Mailing Address:_ P.O. Box 1685 City: Jacksonville State: NC Zip:"28540 Phone: [ 910 I 11h6 U_ 00 Fax: ( 910 ) -346-1210 Vill. APPLICANT'S CERTIFICATION I,(print or Npe name ofperson listed in General Information, item 2) KZ,+h D. W 0.`Ke[;_President 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 Tcorded,and that the proposed project complies with the requirements of 15A NCAC 21-1.100 . Signature: way�-� �U U�Date: Form S VU-101 Version 3.99 Page 4 of 4 JOHN L. PIERCE & ASSOCIATES, P.A. LAND SURVEYING -LAND PLANNING - MAPPING P.O. Box 1685 409 Johnson Blvd. Jacksonville, NC 28541 letter of transmittal Office: (910)346-9800 Fax No.: (910) 346-1210 RAIL JOB NO. July 27 2005 An N noN Rober D. Gordon RE: TO Mr. Robert n_ Cnrdnn Phoenix Park Phases I & TI N.C. Division of Water Quality SW8 010425 Modification Department ot Environment and Nahmal Rocnnrroe 127 Cardinal Drive Extension Wilmington, NC 28405 AUG 0 1 2005 WE ARE SENDING YOU ❑ DRAWINGS ❑ ATTACHED ❑ UNDER SEPARATE COVER Y• HE FOLLOWING ITEMS: ❑ COPY OF LETTER ❑ PRINTS ❑ PLANS ❑ SAMPLES SPECIffgATIONS ❑ CHANGE ORDER ❑ COPIES DATE NUMBER DESCRIPTION 2 Copies of plan 1 Stormwater Treatment 2 Revised Wet Detention THESE ARE TRANSMITTED as checked below: ❑ For approval REMARKS ❑ For your use ❑ As requested ❑ Approved as submitted ❑ Approved as noted ❑ Returned for corrections ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ For review and comment ❑ For bids due ❑ Prints returned after loan to us SIGNED i 1. Stormwater Treatment Erosion Control Narrative Phoenix Park, Phase II East Carolina Community Development, Inc. proposes to construct a forty-eight(48) unit apartment complex on a 5.01 acre tract located on Gum Branch Road (between its intersection with Henderson Drive & its intersection with Western Blvd.)within the city limits of Jacksonville, N.C. The site is currently undeveloped. The project site is located approximately 0.11 miles from an LIT of New River(C;NSW) in the White Oak Basin. The proposed development activities are high density(percent impervious > 25 %), therefore, stormwater treatment facilities are required. The attached Stormwater Plan includes an 8,200 sf wet detention basin at the front of the site. The pond is sized to accommodate 109,406 square feet of impervious area, allocated as follows: Site Offsite Total Buildings 35,069 sf -0- 35,069 sf Streets -0- -0- -0- Parking 57,815 sf -0- 57,815 sf Sidewalks 11,203 sf -0- 11,203 sf Other -0- -0- -0- Reserve for Future 5,675 sf -0- 5,675 sf Total 109,762 sf -0- 109,762 sf The proposed pond is sized for 90%TSS removal. The pond does not incorporate pretreatment, other than the forebay. The pond does not include a vegetated filter at the outlet. All stormwater emanating from impervious surfaces that is generated on-site shall be collected and directed to the rear of the site by a system of sheet drainage and grassed swales. The treatment system will require periodic maintenance. Maintenance frequency shall be dictated by pond depths. Pond depths shall be checked by the owner on a quarterly basis. When measured depths are less than 3.75' (in both the main pond and the forebay), the pond shall be manually dewatered (pump)and accumulated sediment removed and properly disposed of. Site topography is gently sloping (0—5%) generally toward the southerly boundary of the tract. Soils are loamy sand/sandy loam. The entire area designated within "Clearing Limits"will be disturbed during initial construction. The developer intends to construct buildings upon conclusion of infrastructure (parking, drainage, water & sewer). The project will include construction of a 20 asphalt driveway on Phase 1 of the project(approx. 5,319 sf total). Phase I was permitted under SW8 010425 in 2001. A portion of the proposed driveway (2,500 sf)will drain back to the existing pond serving Phase I. However, there is no net increase in impervious area draining to this pond. The permit for Phase I included 2,500 sf for a playground area which was originally assumed to be impervious. The playground area, however, was constructed as an open, grassed area. The 2,500 sf has been "re-allocated"as streets/parking. The remainder of the proposed asphalt driveway on Phase 1 (2,819 sf) drains to proposed Pond 2 and is accounted for in the calculations for that pond. AUG 0 17066 BY: Crystal Coast Engineering PA 3817-3 Freedom Way Hubert, N.C. 28539 Tel: (910)325-0006 Fax: (910)325-0060 Email: crystalcoasleng@b¢ec.m.com July 26, 2005 Mr. Robert D. Gordon N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 Re: Stor mwater Project No. SW8 010425 Modification Pheonix Park Phases I & II Onslow County Dear Mr. Gordon, We are in receipt of your Request for Additional Information dated July 22, 2005 for the referenced project. We provide the following information to allow you to continue the stormwater review(item number corresponds to your original Request): 1. A new signed Supplement for Pond 1 is enclosed. 2. There is no net increase of BUA to Pond No. 1. Only 2,500 sf of the proposed 20' driveway is tributary to Pond 1. The design for Pond 1 included an allocation of 2,500 sf for a playground area which was assumed, at that time, to be impervious. The playground area, however, was actually constructed as an open, grassed area. The remainder of the 20'driveway is tributary to Pond 2 (approximately 2,819 sf) and is accounted for in the design calculations for this pond. The Narrative has been revised in order to clarify. 3. The BUA in the narrative has been updated. 4. The figure on the drawings (21,283 sf]I is gross floor area. The buildings are two-story. Actual 'footprint" is 10,641 sf. 5. Added additional spot elevations. 6. Added additional spot elevations and flow direction arrows. We are hopeful that this response addresses all concerns and that the permit can be issued in the near future. Should you have questions or additional concerns, please feel free to contact me. Yours truly, D K. Newsom, PE CRYSTAL COAST ENGINEERING P. 1 * * * COMMUNICATION RESULT REPORT ( SUL.22.2005 10:27RM ) TTI NCDENR WIRO FILE MODE OPTION ADDRESS (GROUP) RESULT PAGE --j ------------------------------------------------------------------------- -- 6-7 MEMORY TX 919103250060 OK P. 3/3 ------------------------------------ ----------------------------------------- REASON FOR ERROR E-1) HANG UP OR LINE FAIL E-2) BUSY E-3) NO ANSWER E-4) NO FACSIMILE CONNECTION FAX COVER SHEET Date: July 22, 2005 No. of Pages: To: David Newsom, PE From:Robert Gordon Company: Crystal Coast Engineering Express permitting sec on FAX #: 910-325.0060 FAX# 910-350.2004 Phone #910.796-7303 DWQ Stormwater Project Number: SWB 010425 Modification Project Name: Phoenix Park Phases I and II MESSAGE: Request for additional Information, mailed copy to follow. Give me a call if there are any questions. Thanks. FAX COVER SHEET Date: July 22, 2005 No. of Pages: A10 To: David Newsom, PE From: Robert Gordon Company: Crystal Coast Engineering Express permitting sect on FAX #: 910-325-0060 FAX # 910-350-2004 Phone # 910-796-7303 DWQ Stormwater Project Number: SW8 010425 Modification Project Name: Phoenix Park Phases I and II MESSAGE: Request for additional Information, mailed copy to follow. Give me a call if there are any questions. Thanks. . OF W gTF9 Michael F. Easley, Governor O� �G William G. Ross, Jr., Secretary CO r North Carolina Department of Environment and Natural Resources y Alan W. Klimek, P.E. Director Division of Water Quality July 22, 2005 Mr. Keith Walker, President East Carolina Community Development 315 Turner Street Beaufort, NC 28516 Subject: Request for Additional Information Stormwater Project No. SW8 010425 Modification Phoenix Park Phases I and II Onslow County Dear Mr. Walker: The Wilmington Regional Office received a Stormwater Management Permit Application for Phoenix Park Phases I and II on July 19, 2005. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: 1 . The supplement for the phase I pond has been updated. Please provide an original signature for this supplement. 2. The permitted built-upon area for pond 1 was 91,155 sf. 2,500 sf of new impervious area are proposed to drain to this pond. The current application still lists 91,155 sf of impervious area draining to pond 1 (was the playground never built?). Please address this in a narrative. => Note - If there is an overall increase in impervious area to pond 1, a new set of calculations and a new supplement will be necessary; if there is not, please address what has changed in a phase 1 narrative and neither new calculations or a new pond 1 supplement will not be necessary 3. The built-upon area listed in the narrative, the application and the calculations are all different. Please clarify. 4. The typical dimensions listed for Bldg A do not add up to the 21 ,283 sf listed. Please address this. 5. Please provide a few spot elevations on the sidewalks to verify they drain to the permitted system. 6. It is difficult to tell how the 20' drive that connects phase 1 and phase 2 drains from the spot elevations provided. Please provide enough information to verify it drains to the permitted system. 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 August 1, 2005, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone(910)796-7215 Customer Servicel-877-623-6748 Wilmington Regional Office Wilmington,NO 28405-3845 FAX (910)350-2004 Internet: h2o.enr.state.nc.us One N Carolina An Equal Opportunity/Affirmative Action Employer—50%Recycled110%Post Consumer Paper Vatm alll/ -Phoenix Park Phases I and II July 22, 2005 Stormwater Permit # SW8 010425 Modification If you need additional time to submit the information, please mail 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. 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) 796-7303. Sincerely-,- (40 D' 4J___ Robert D. Gordon Environmental Engineer II ENB/RDG: S:\WQS\STORMWATER\ADDINFO\2005\010425modJul22 cc: David Newsom, PE, Crystal Coast Engineering Robert D. Gordon TopoZone - The Web's Topographic Map Page 1 of 1 �topozone' Ln7A+y11f9�420D3 kb�balla,kc� `y ..+ `., e..,.���� Y� y''' ~ p47 J `� •�< ' _. 50 dam 1 �II K I rK C LG^ �v .... ..� v u�s, 6a��x �• tv -r' `j r�° ti4� ; ��� f � 1� ,4` , 117 Al t� �9y `• �� � •f t r fi ,ia J � ��,.,�cv f Ay � 41 I- m� "y•� 1 t ..Y.r �� Yy ?� -J t` f� d �Y_ /TI ,fU_pSId )/ �IAV i t ��. . a l , P`.1,1� ,i; �1 �{�• i-. �.� 1,.,.{j� 0 0.3 0.6 0.9 1.2 1.5 km M 0 0.2 0.4 0.6 0.8 1 mi Map center is 340 47' 36"N, 770 26' 06"W (WGS84/NAD83) Jacksonville North quadrangle M=-9.451 Projection is UTM Zone 18 NAD83 Datum G--1.39 9 — — — http://www.topozone.com/print.asp.z 18&n-3852827.12411951&e-277221.418200314&... 7/21/2005 3817-3 Freedom Way ffi Hubert,N.C.28539 ], Tel:(910)325-0006 I I �J,l ,✓ Fax:(910)325-0060 I --7 �� C al Coast W Engiheering, PA -5y 660 r Traisn*W To: Cameron Weaver From: David K. Newsom :5yW NCDENR C , g`J]+�D L 14 ZUU5 � Q U Re: Pheonix Park Phase I and Phase 11 Date: July 19, 2005 ❑Urgent ❑ For Review ❑Please Comment ❑Please Reply ❑Please Recycle Attached: One(1)original&one(1)copy application form One(1)copy Supplement for each pond(Existing Pond 1 and Proposed Pond 2) Pond 1 and Pond 2 Calculations Permit Fee Narrative Copy of Original Permit SW8 010425 Comments: Have addressed all comments from pre-submittal meeting. Because of additional impervious surface proposed within the limits of Phase I (i.e., 2,500 sf of parking/road), we have decided to modify the original permit (as opposed to separate & new permit for Phase II). The existing Phase 1 pond is adequate to accommodate the additional 2,500 sf of BUA. 0 ./2005 12:59 910-346-1210 ' JOHN PIERCE SURVEYOR PAGE 06 State Starmu'zter Manaeement Systems Phoenix Park Permit Nip. SWS 010415 S10rmwater Permit No. SWS 010425 Onslow County Designer's Certification 1' A��rnM as a duly registered + , 1 the State t. North Carohna, having been authorized to observe ��_in the project (P€IiadtG311y(weekly/full time a construction of _(Project) for .(Project Owner)hereby state that,to the best ofmy abilities,due care an dt igence was used in the observation oftlle project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. Tb.e checklist of items on page 2 of this form is included in the Certification, Noted deviations from approved plans and specification: CARS �D�pFESSrptiZGy9,' Signature 18148 _ SEAL RegistratiqNuumber Date� r/ �� K. NE`N�'. ®_ 6 t ., ., 0a�18/2005 12:59 910-346-1210 JOHN PIERCE SURVEYOR PAGE 07 w State StOTMwater Management Systems Permit No.SW8 010425 Certification Requirements: D�li✓1. The drainage area to the system contains agN_QxiMate!Lthe permitted acreage. T�drainaCMt� Y wo�ain��o � t6 ,27 a 4he permitted amount of built-upon area. All the built-upon area associated with the project is graded such that the runoff drains to the system. r,u(a[�• The outlet/bypass structure elevations are per the approved plan. The outlet structure is located per the approved plans Trash rack,is provided on the outlet/bypass structure. /�XI<Lttr. All slopes are grassed with permanent vegetation. p Vegetated sltipes are no steeper than 3:1. D/ The inlets are located per the approved plans and do not cause short-circuiting of the system. PZ91. 0• The permitted amounts of surface area and/or volume have been provided. 1. Required drawdown devices are correctly sized per the approved plans. 014 2• All required design depths are provided. JZ&13. All required parts of the system are provided, such as a vegetated shelf, and a forebay. DZ4. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDENR-DWQ Regional Office Jacksonville, Onslow County Building Inspector 7 CARo • ' ssi ' �. Design Calculations Stormwater Treatment Facilities CAI_ = for 18148 = Phoenix Park Phase II located in Onslow County —K7 1. PROJECT DESCRIPTION -` 86 This Project consists of a proposed Apartment Complex on a 5.39 ac. tract and associated sitework 2. COMPUTE POND AREA REQUIRED a. Compute Percent Impervious: Impervious Areas: Existing Proposed Total On-Site Buildings 35,069 SF 4:';.....i35,J,9; On-Site Streets0 SF On-Site Parking 57,815 SF On-Site Sidewalks Q € 14, Q3 11,203 SF Other on-site 0 Off-site 0 Sub-Total 0 104,087 104,087 SF FUTURE(reserved) 5.675 SF Total 0 109,762 109,762 SF Total Area Drainage to Pond: f. T 9Sk SF Percent Impervious = 0.584 or 58.4 % b. Compute Pond Surface Area Using Surface Area to Drainage Area Ratio Chart for 90% TSS Removal (copy attached)and assuming „A .5. foot pond depth: SA/DA = Q,3.4 % (interpolated) Therefore: Surface Area = SA/DA x Drainage Area = 8,157 SF say: 8,20.p SF c. Compute Minimum Pond Dimensions Assume rectangular shape with 3:1 Length (L)to Width(W) Ratio: Length = 156.84 feet Width = 52.28 feet Site conditions, however, dictate irregular shaped pond: Hydr. Length 14 T';feet so, Hydr. Width 53.0 feet(avg) Actual L/W = 2.9 (irregular shape) 3. DETERMINE VOLUME TO BE CONTROLLED FROM 1" STORM (NCDENR REQUIREMENT) Using Schuler"Simple Method": Rv= 0.05 + 0.009(I) where I = percent impervious Rv= 0.576 in/in Control Volume= Design Rainfall x Rv x Drainage Area Control Volume= 9,015 CF say :`: „ 141If. CF 4. DETERMINE VOLUME TO BE CONTROLLED FROM 25 YR STORM (CITY REQUIREMENT) Assume 25 Yr-1 hour Storm = 2.95 in/hr Using Schuler"Simple Method": Rv= 0.05 + 0.009(I) where I = percent impervious Rv= 0.576 in/in Control Volume = Design Rainfall x Rv x Drainage Area Control Volume = 26,595 CF say {t,6QQ 5. DETERMINE REQUIRED STORAGE DEPTH Assume: 3:1 side slopes solving for depth (d) by trial & error: d = 1.03 6. DETERMINE ORIFICE SIZE Control Volume must be drawn down over a 2 day- 5 day period. Using orifice equation, solve for Diameter(D)that results in 3-1/2 day period: D = (Q /0.026(h)'e),e Where: Q = (Control Volume / 3.5 days x 86,400 sec/day) = 0.030 cfs h = d /2 = 0.52 Solving for D: D = 1.27 Use , 1.; u " pipe Actual Drawdown with actual drawdown pipe diameter(using orifice equation): Q= 0.042 cfs Draw Down Period = 2.51 days OK , < 5.0 7. SELECT OUTLET STRUCTURE DIAMETER Size outlet structure such that depth of Q10 flow <1.0 feet: Using Rational Formula (Q=CIA)where: Cimper= A..B.' Ccum = 0.59 ::..:..:..A :.....4.31 ac Q10 = 16.60 cfs Assuming 1/2 circumference is used as weir and using Francis Formula (Q=3.33LH''S)to solve for L such that H = 1.0: L = 4.99 Feet Min 36 inch diameter outlet structure Use 48 inch diameter outlet structure 6. DETERMINE Q10 STAGE Q10 = 16.60 cfs Using Francis Formula(Q=3.33LH"')solve for H: H10 = 0.86 feet 9. DETERMINE Q100 STAGE(ELEV. OF EMERGENCY SPILLWAY) Using Rational Formula(Q=CIA)where: Ccum = 0.59 .......................... ........................... 1100 $SUin/hr A ...:...:......:.4.31 ac Q100 = 21.71 Using Francis Formula (Q=3.33LH"5)solve for H: H100 = 1.02 feet 10. DETERMINE Q100 STAGE OVER EMERGENCY SPILLWAY(TOP BERM ELEV.) Assume primary spillway blocked (i.e., emergency spillway to accommodate Q100) Emergency spillway shall be a broad crested earthern weir designed to pass 100 year storm. Using broad crested weir equation H = (Q/Cw x L)ti3 where: Q = Q100 21.71 cfs Cw = 3.0 Length 36.feet H = 0.39 feet 11. FOREBAY SIZING Compute Actual Pond Volumes (using average end method): Avg Incr. Incr. Cum. Main Bay Volume : Elevation Area (SF) Area (SF) Depth T Vol (CF) Vol(CF) ..................................................................... Pond Bottom 35.70 1,7961; Bottom Veg Shelf 39 03 3 454 2,625 3.33 8,741 8,741 Normal Pond 4070 6,621< 5,038 1.67 8,413 17,154 Main Bay Volume = 17,154 CF Forebay Volume ' Elevation Area S Area (SF l e t F Vol (CF 1 VolC ........................... Pond Bottom 35.70 .297 Normal Pond 40 70 1 57g< 938 5.00 4,690 4,690 . ................................................ Forebay Volume = 4,690 CF Total Pond Volume = 21,844 CF Forebay Volume equates to 21.5 % of Total Volume Temp. Storage Volume Elevation Area (SF) Area (SF) Depth(FT 1 Vol (CFI Vol(CFl Normal Pond 40.70 8,200 Temp. Pond Level 41 73 9,A7U} 8,835 1.03 9,100 9,100 Temp. Pool Volume = 9,100 CF 25 Yr Storage Volume Elevation Area (SF Area (SF l Depth(FT l Vol (CF 1 Vol(CF1 Normal Pond 40.70 8,200 Rat Wall 43.00 11,147 9,674 2.30 22,249 22,249 25 Yr Pond Level 43.3$ 11,147 11,147 0.39 4,347 26,596 25 Yr Pool Volume= 26,596 CF 100 Yr Storage Volume : Elevation Area (SF l Area (SF l Depth(FT l Vol (CF) VolC 25 Yr Pond Level 43.39 11,147 ................................................................... 100 Yr Pond Level 44 41 11 147 11,147 1.02 11,425 11,425 100 Yr. Pool Volume = 38,022 CF 12. SUMMARY Pond Elevations: Relativ Actual Top Berm(minimum) 7.44 44.80 H= 0.39 100-Yr. Flood 7.05 44.41 (emerg. weir elev) H100= 1.02 25-Yr. Flood 7.69 43.39 H10= 1.66 1-inch Storage 6.03 41.73 (primary weir elev) storage depth= 1.03 Permanent Pool 5.00 40.70 (invert out elev) pond depth= 5 .......................... Pond Bottom ........................... 13. WET DETENTION BASIN SUPPLEMENT Basin Bottom Elevation 35.70 Perm. Pool Elevation 40.70 Temp. Pool Elevation 41.73 Perm Pool Surface Area 8,200 SF Drainage Area 4.31 AC Impervious Area 2.52 AC Perm. Pool Volume 21,844 CF Temp Pool Volume 9,100 CF Forebay Volume 4,690 CF SAIDA 4.34 Diameter of Orifice 1.50 Design Rainfall 1" Design TSS Removal 90% i Pv/v/�> _ oce5 cn - ------ ------ - - - - -... - - -- - _ _.----C�/1//7luL 1,67 Qa\ - r GF5 a,06/2P/2005 11: 42 910-346-1210 JOHN PIERCE SURVEYOR PAGE 02 MCD� SOS D�d North Carollna Department of Environment and Natural Resources `1/� 127 Cardinal Drive Extension,Wilmington, NC 28405 (910)396-3900 FAX(910)350.2004 W ` 1"R- ff Request for Express Permit Review o 1�4 FILL-IN all Information below and CHECK required Permft(s), f FAX to Cameron Weaver along with a narrative and vicinity map of the project location. A Projects must be submitted by 9:00 A.M, of the review date, unless prior arrangements are made. APPLICANT Name Keith Walker,President Company_Fast Carolina Corrmunity Development Inc Address "115 Turner Street City/State_Beaii ort. NC Zip 28514 County ar r Phone ('g'52)504-5424 Fax_ Email PROJECT Name_ Phoenix Park Phase TT ENGINEER/CONSULTANT John L. Pierce Company John L. Pierce &. Associatds P.A. Address— P.O. Box 1685 1 City/State racksomr,l i Zip 2Z540 . County nncl�w Phone(910)346-9800 Fax (910) 346-1210 Email_ her,-j,biLp . ;,ec ir_rmm __ — ---- - -- — -----••------- - -� — - --- ----- __ - ---_ _- ❑ STREAM ORIGINATION CERTIFICATION :: ---------------------------- -- ® STORMWA TER ❑ Low Density High Density-Detention Pond ❑ High Density-Other ❑ Low Density-Curb& Gutter ❑ High Density-Infiltration ❑ Off site -------------•-— ❑ COASTAL ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information MANAGEMENT ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront ❑ LAND QUALITY ❑ Erosion and Sedimentation Control Plan with acres to be disturbed. --------- — ❑ WETLANDS (401) ❑ No Wetlands on Site (letter from COE) ❑Wetlands Delineated/No JD ❑ Greater than 0.1 AC Wetlands Impacted []Jurisdictional Determination has been done ❑ Less than 0.1 AC Wetlands Impacted ❑Greater than 0.5 AC Wetlands Impacted The legislation allows additional fees, not to exceed 50% of the original Express Review permit application- --- fee, to be charged for subsequent reviews due to the insufficiency of the permit applications. For DENR use only SUBMITTAL DATES: Fee Split for multiple p6rmits: SW $ CAMA $ LQS $ 401 _ $ Total Fee Amount $ 06/28/2005 11: 42 910-346-1210 JOHN PIERCE SURVEYOR PAGE 03 NARRATIVE FOR NCDENR STORMWATER FAST TRACK HIGH DENSITY APARTMENT COMPLEX PHOENIX PARK PHASE II EAST CAROLINA COMMUNITY DEVELOPMENT, INC JACKSONVILLE TWP., ONSLOW COUNTY,NC JULY 2005 The Phoenix Park site contains 5.01 acres and is located off of NCSR 1308 approximately 2.8 miles northeast of its intersection with US Hwy 17. The site is bound to the east by residential property and on all other sides by vacant property. This is a high density site that will utilize a wet detention pond for stormwater treatment. 14 '1., IILL �[ 'j a I F X /+ 1+1�1(gAV11ltA ti911 . a t 1 .. 7 �' - i \ e Y F nr � p raM+ •.W 1 A +� 'vpq( ILL , +t ' } t i ; O$/26/2005 11: 42 910-346-1210 JOHN PIERCE SURVEYOR PAGE 01 JOHN L. PIERCE & ASSOCIATES, P.A. LAND SURVEYING •LAND PLANNING•MAPPING MESMIlm OFFICE:910-346-9800 FAX:910-346-1210 E-MAIL:betlybjlp@bizec.rr.com P.D. Box 158.5 or bjarman@blzec.rr.com 409 Johnson Blvd. Jacksonville, NO 26541 Jacksonville,NO 28540 DATE: FAX NO- (910) 346-1210 157 TO: NUMBER OF COPIES IN=ING THIS PAGE REMARKS: LOT.i,FARMLANO AND WOODLAND SURVEYING•SITE PLANNING•SUBDIVISION LAYOUT•LAND DEVELOPMENT PLANNING CONSTRUCTION SURVEYING-TOPOGRAPHIC SURVEYING AND MAPPING Phase I Environmental Audit/Rlsk Assessment NC SEC OF STATE 919 807 2039 10/07 102 11 :41 Nr 362540 22 284 5045 Sd: 10/ 0/2002 State of North Carolina Date Filed: 1011512002 3:16 PM Department of the Secretary of State Elaine F. Marshall North Carolina Secretary of State NONPROFIT CORPORATION'S STATEMENT OF CHANGE OF PRIN, Pursuant to§5 SA-M2.1(b)of the General Statutes of North Carolina,the undersigned nonprofit corporation aces nemoy suormt the following for the purpose of changing its principal office address currently on file with the Secretary of State. INFORMATION CURRENTLY ON FILE The name of the corporation is: East Carolina Community DPvalnnmPnt Tnr- The street address and county of the principal office of the corporation currently on file is: Number and Street: 216 Turner Street City,State,Zip Code: Beaufort, NC 28516 County: Carteret- The mailing address f/diWerenrjrorn tAestree/address of the principal office currently on file is: NEW INFORMATION I. The street address and county of the new principal office of the corporation is: Number and Street: 315 Turner Street City,State,Zip Code: Beaufort, NC 28516 County: Carteret 2. The mailing address if differearjrom the street address of the new principal office is: 3. This statement will be effective upon filing unless a later date and/or time is specified: Thisisthe8thdayof October ,2002 . t Ca o11 Pa Community Development Inc. Na a of Corpaiploi, $ij;rwru.a Keith D. Walker CEO & President Type or Print Name and Title NOTES: I. Filing fee is SS. This statement and one exact or conformed copy of it must be filed with the Secretary of State. Revised January 2000 Form N-12 CORPORATIONS DIVISION P.O.BOX 29622 RALEIGH,NC 27626.0622