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HomeMy WebLinkAboutSW8060338_HISTORICAL FILE_20090522STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO SW8 (�l0 033�3 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 2 0 0 g 0 5 22 YYYYMMDD r NCDENR North Carolina Department of Environment and Natural Resources Beverly Eaves Perdue Governor May 22, 2009 Mr Sheldon Tucker, Manager Ocean Isle Palms, LLC 131 Ocean Blvd West Hoiden Beach, NC 28462 Division of Water Quality Colleen H Sullins Director Subject Stormwater Permit No SW8 060338 MOD Ocean Isle Palms Phase 1 High Density Subdivision Project Brunswick County Dear Mr Tucker Dee Freeman Secretary The Wilmington Regional Office received a modified Stormwater Management Permit application for Ocean Isle Palms Phase 1 on May 13, 2009, with additional information submitted on May 21, 2009 The modifications include changes to the total impervious area to ponds for a few additional lots, and miscellaneous other changes such as pond outlet structure details on the plans 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 060338 MOD, dated May 22, 2009, for the construction of the project, Ocean Isle Palms Phase 1 This permit shall be effective from the date of issuance until November 29, 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 Please replace the application documents, plan set, and supplements previously approved on November 29, 2007 and March 30, 2009, with new ones, attached If you have any questions please contact M J Naugle or me at (910) 796-7215 Sinc rely, � �s Georgette Scott Stormwater Supervisor Division of Water Quality GDS/mjn S \WQS\STORMWATER\PERMIT\060338 mod may09 cc Tom Purvis, P E , Cape Fear Engineering, 910-383-1044, fax 1045 Ocean Isle Beach Building Inspections Jeff Phillips, Brunswick County Engineering -Wilmington Regional Office Central Files, M J Naugle Wilmington Regional Office 127 Cardinal Drive Extension Wilmington North Carolina 28405 One Phone 910 796 7215 \ FAX 910 350 2004 \ Customer Service 1-877 623-6748 NarihCarottna Internet ncwalerquallty org-1����� An Equal Opportunity l Affirmative Action Employer (�/�/ sHally State Stormwater Management Systems Permit No SW8 060338MOD STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY SUBDIVISION 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 Sheldon Tucker & Ocean Isle Palms, LLC Ocean Isle Palms Phase 1 1338 Ocean Isle Beach Road, Ocean Isle Beach, Brunswick County FOR THE construction, operation and maintenance of three (3) wet detention pond(s) 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 November 29, 2017 and shall be subject to the following specified conditions and limitations I DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data 2 This stormwater system has been approved for the management of stormwater runoff as described in Section 16 on page 3 of this permit The subdivision is permitted for 238 lots, each allowed a maximum of 6,000 square feet of built -upon area The Amenity Center and Canoe and Kayak Club are limited to a maximum of 93,654 square feet and 2,614 square feet, respectively, of built -upon area Future bua in drainage areas routed to ponds #12 and 21 are allocated for 26,877 and 29,500 square feet, respectively Development of the future bua requires a submittal of plans and details with approval by the Division prior to construction 3 Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit 4 The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system 5 Each of the ponds is designed for 90% TSS removal, therefore, no vegetated filter is required Page 2 of 9 State Stormwater Management Systems Permit No SW8 060338MOD 6 The following design elements have been permitted for the wet detention ponds 12, 14 and 21, and must be provided in the system at all times Design Criteria Pond #12 Pond #14 Pond #21 a Drainage Area, acres 2482 51 27 2511 Onsite, ft` 1,081,159 2,233,321 1,093,685 Offsite, ft' none none none b Total Impervious Surfaces, ft 545,807 1,151,623 561,672 (#)Lots at 6,000 ft` per lot (69 5) 417,000 (125) 750,000 (43 5) 261,000 Roads/Parking, W 95,396 279,655 134,557 Sidewalks, ft` 871 0 22,548 Alleyways, ft` 3,049 121,968 20,413 Canoe & Kayak Club 2,614 0 0 Amenity Center, ft` 0 0 93,654 Off -site 0 0 0 Future 26,877 0 29,500 c Pond Depth, ft 60 13 max 11 0 (max) Average Pond De th, ft 50 70 65 d TSS removal efficiency, % 90 90 90 e Design Storm, inches 1 1 1 f Permanent Pool Elev, , FMSL 3600 800 600 Perm Pool Surface Area, ft 95,110 50,491 62,543 h Permitted Storage Volume, ft 204,215 108,618 131,772 i Temporary Storage Elev, , FMSL 3800 990 8 Controlling Onfice, "0 i e 3 4 3 k Permanent Pool Volume, ft 484,740 359,604 355,575 1 Permitted Forebay Volume, ft 45,512 59,126 107,554 m Maximum Fountain Horsepower 2 1 1 n Receiving Stream/River Basin UT to Jinny's Branch / Lumber o Stream Index Number 15-25-2-16-1-(1 5) Classification of Water Body C Sw,HQW II SCHEDULE OF COMPLIANCE No person or other legal entity shall alter the approved stormwater management system or fill in, alter or pipe any drainage feature, including swales, shown on the approved plans as part of the stormwater management system, unless and until the permittee submits a modification to the permit and receives approval from the Division The permittee is responsible for verifying that the proposed built -upon area on each individual lot, and for the entire project, does not exceed the maximum allowed by this permit The maximum built -upon area assigned to each lot via this permit and the recorded deed restrictions may not be increased or decreased by or with the knowledge of, either the lot owner or the permittee, unless and until the permittee notifies the Division and obtains written approval from the Division At a minimum, this will require an amendment to the recorded deed restrictions, and may also require a permit modification If the permittee establishes an Architectural Review Board or Committee to review plans for compliance with the Covenants and Restrictions, including the lot BUA limit, the plans reviewed must include all proposed built -upon area on that lot Any approval given by the Board on behalf of the permittee does not relieve the permittee of the responsibility to maintain compliance with the overall permitted built -upon area for the protect, nor does it relieve the individual lot owner of the responsibility to maintain compliance with the BUA limit assigned to that lot via the recorded deed restrictions Page 3 of 9 State Stormwater Management Systems Permit No SW8 060338MOD 5 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 6 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 7 The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below a Any revision to the approved plans, regardless of size b Project name change c Transfer of ownership d Redesign or addition to the approved amount of built -upon area e Further subdivision, acquisition, or sale of all or part of the protect area The protect area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought f Filling in, altering, or piping of any vegetative conveyance shown on the approved plan 8 The Director may determine that other revisions to the protect should require a modification to the permit 9 All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements The final plats for the protect will be recorded showing all such required easements, in accordance with the approved plans 10 During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately 11 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 12 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 13 Permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual 14 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 15 This permit shall become void unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data Page 4 of 9 State Stormwater Management Systems Permit No SW8 060338MOD 16 The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stormwater system function at optimum efficiency The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to a Semiannual scheduled inspections (every 6 months) b Sediment removal c Mowing and re -vegetation of side slopes d Immediate repair of eroded areas e Maintenance of side slopes in accordance with approved plans and specifications f Debris removal and unclogging of structures, orifice, catch basins and piping g Access to all components of the system must be available at all times 17 Prior to the sale of any lot, the following deed restrictions must be recorded a The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW8 060338MOD, as issued by the Division of Water Quality under NCAC 2H 1000 b The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the Stormwater Management Permit c These covenants are to run with the land and be binding on all persons and parties claiming under them d The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the State of North Carolina, Division of Water Quality e Alteration of the drainage as shown on the approved plans may not take place without the concurrence of the Division of Water Quality f The maximum built -upon area per lot is 6,000 square feet for 238 lots This allotted amount includes any built -upon area constructed within the lot property boundaries, and that portion of the right-of-way between the front lot line and the edge of the pavement Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools g All runoff on the lot must drain into the permitted system This may be accomplished through providing roof drain gutters, which drain to the street, grading the lot to dram toward the street, or grading perimeter swales and directing them into the pond or street Lots that will naturally drain into the system are not required to provide these measures h Built -upon area in excess of the permitted amount will require a permit modification 18 A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of recording the plat, and prior to selling lots The recorded copy must contain all of the statements above, the signature of the Permittee, the deed book number and page, and the stamp/signature of the Register of Deeds 19 Prior to transfer of the permit, the stormwater facilities will be inspected by DWQ personnel The facility must be in compliance with all permit conditions Any items not in compliance must be repaired or replaced to design condition prior to the transfer Records of maintenance activities performed to date will be required Page 5 of 9 State Stormwater Management Systems Permit No SW8 060338MOD 20 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 foot 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 the fountain's pump is based on the permanent pool volume The maximum pump power for a fountain in Pond #12, 14, and 21 is 2 HP, 1 HP, and 1 HP, respectively III GENERAL CONDITIONS 1 This permit is not transferable to any person or entity except after notice to and approval by the Director In the event there is either a desire for the facilities to change ownership, or there is a name change of the Permittee, a completed "Name/Ownership Change Form" must be submitted to the Division of Water Quality, signed by the parties involved, along with the applicable documents as listed on page 2 of the form The project must be in good standing with DWQ The approval of this request will be considered on its merits and may or may not be approved 2 The permittee is responsible for compliance with all of the terms and conditions of this permit until such time as the Director approves the transfer request 3 Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215 6A to 143-215 6C 4 The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal), which have jurisdiction 5 In the event that the facilities fail to perform satisfactorily, including but not limited to, the creation of nuisance conditions and failing to draw down within 2-5 days, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems 6 The permit may be modified, revoked and reissued or terminated for cause The filing of a request for a permit modification, revocation and re -issuance or termination does not stay any permit condition 7 Permittee grants permission to staff of the DWQ to access the property for the purposes of inspecting the stormwater facilities during normal business hours 8 The permittee shall notify the Division in writing of any name, ownership or mailing address changes at least 30 days prior to making such changes 9 The permittee shall submit a permit renewal application to the Division at least 180 days prior to the expiration date of this permit The renewal application will include the processing fee and other documentation as required Page 6 of 9 State Stormwater Management Systems Permit No SW8 060338MOD 10 A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction Permit modified and reissued this twenty-second day of May 2009 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Meen H SlOins, Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 060338MOD Page 7 of 9 State Stormwater Management Systems Permit No SW8 060338MOD Ocean Isle Palms Phase 1 Stormwater Permit No SW8 060338MOD Brunswick County Designer's Certification Page 1 of 2 I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the protect, (Protect) for Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the protect 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 a part of this Certification Noted deviations from approved plans and specifications Signature Registration Number Date SEAL Page 8 of 9 J State Stormwater Management Systems Permit No SW8 060338MOD Certification Requirements Page 2 of 2 1 The drainage area to the system contains approximately the permitted acreage 2 The drainage area to the system contains no more than the permitted amount of built -upon area 3 All the built -upon area associated with the project is graded such that the runoff drams 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 draw down devices are correctly sized per the approved plans 13 All required design depths are provided 14 All required parts of the system are provided, such as a vegetated shelf, a forebay, and the vegetated filter 15 The required dimensions of the system are provided, per the approved plan cc NCDENR-DWQ Regional Office Ocean Isle Beach Building Inspections Brunswick County Building Inspections Page 9 of 9 RECETV laQ�2� 4? N DWO'08EONL --- Date Received �� _Fee Paid Permit Number rnA� ► ���g g� 3 min IN State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I GENERAL INFORMATION 1 Applicants name (specify the name of the corporation, individual, etc who owns the project) Ocean Isle Palms, LLC 2 Print Owner/Signing Official's name and title (person legally responsible for facility and compliance) Sheldon Tucker, Manager 3 Mailing Address for person listed in item 2 above 131 Ocean Boulevard West City Holden Beach State NC Zip 28462 Phone (910 ) 6124899 Fax Email stucker2491@aol corn 4 Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc ) Ocean Isle Palms Phase 1 5 Location of Project (street address) 1338 Ocean Isle Beach Road City Ocean Isle Beach County NC Zip 28469 6 Directions to project (from nearest major intersection) Take US Hwy 17 south to SR 1194 (Ocean Isle Beach Road) Take left on SR 1184 Site is approximately 5 7 Latitude 330 55' 11 55" N Longitude 78' 26 39 72" W of project 8 Contact person who can answer questions about the project Name Tom Purvis, P E Telephone Number (910 ) 383-1044 Email tom purvis@capefearengmeenng corn II PERMIT INFORMATION 1 Specify whether project is (check one) ❑New ❑Renewal ®Moddication M Form SWU-101 Version 09 25 08 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 SW8 060338 and its issue date (if known)November 29, 2007 3 Specify the type of project (check one) ❑Low Density (gFhgh Density []Redevelop ❑General Permit ❑Universal SMP []Other 4 Additional Project Requirements (check applicable blanks, information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748) ❑CAMA Major ®Sedunentation/Erosion Control ❑404/401 Permit ❑NPDES Industrial Stormwater III PROJECT' INFORMATION 1 In the space provided below, summarize how stormwater will be treated Also attach a detailed narrative (one to two pages) describing stormwater management for the project Stormwater runoff from aft impervious surfaces will be collected and treated in 3 wet dentention basins 2 Stormwater runoff from this project drams to the Lumber River basm 3 Total Property Area 114 45 acres 4 Total Coastal Wetlands Area 0 acres 5 Total Property Area (3) - Total Coastal Wetlands Area (4) = Total Project Area" 114 45 acres 6 (Total Impervious Area / Total Project Area) X 100 - Project Built Upon Area (BUA) 45 % 7 How many drainage areas does the project have73 8 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 mformabon for each area provided in the same format as below I� Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parting areas, sidewalks, gravel areas, etc "Total project area shall be calculated to exclude Coastal Wetlands from use when calculating the built upon area percentdge calculation This is the area used to calculate overall percent project built upon area (BUA) _ FormSWU-101 Version092508 Page 2of4 MAY 2 12D09 7kRED5C VED AY 2009 Basin Information Drainage Area 3, Pond 21 Receiving Stream Name Jmn s Branch IBY Receiving Stream Class & Index No C Sw HQW,15-25-2-16-1- 1 5 Total Drainage Area (sf) 1,093,685 On -site Drainage Area (sf) 1,093,685 Off -site Drainage Area (st) 0 Existing Impervious* Area (sf) 0 Proposed Im ervious* Area (sf) 561,672 % Impervious* Area (total) 51 36 Impervious* Surface Area Drainage Area Pond 21 On -site Buildings (sf) 261,000 ✓ >= 4aGLbis On -site Streets (sf) 134,557 ✓ On -site Amenity Center (sf) 93,654 On -site Sidewalks (sf) 22,548 ✓ On -site RESERVE (future) 29,500 ✓ Other on -site (sf) A ley Ways = 20,413 Off -site (sf) 0 Total 561,672 to - Page 2A of 4 9 How was the off -site impervious area listed above MAY 1 8 2009 Projects in Union County Contact the DWQ Central Office staff to check to see f you project is located within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater requirements IV DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following property 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 Forms can be downloaded from http /P12o enr state nc us/su/bmp forms htm - deed restrictions Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded property restrictions and protective covenants for this project shall include all the applicable items required in the above form, 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 NC DWQ 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 Permitting Unit at (919) 807-6300 for the status and availability of these forms Forms can be downloaded from htto //h2o enr state nc us/su/bmp forms htm Form SW401-Low Density Form SW401-Curb Outlet System Form SW401-Off-Site System Form SW401-Wet Detention Basin Form SW401-Infiltration Basin Form SW401-Infiltration Trench Form SW401-Bioretention Cell Form SW401-Level Spreader Form SW401-Wetland Form SW401-Grassed Swale Form SW401-Sand Filter Form SW401-Permeable Pavement Form SW401-Cistern Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Wet Detention Basin Supplement Infiltration Basin Supplement Underground Infiltration Trench Supplement Bioretention Cell Supplement Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Constructed Wetland Supplement Grassed Swale Supplement Sand Filter Supplement Permeable Pavement Supplement Cistern Supplement Form SWU-101 Version 09 25 08 Page 3 of VI SUBMITTAL REQUIREMENTS MAY 1 8 200E Only complete application packages will be accepted and reviewed by I��iwsion o�tYatec¢u�hty (DWQ) A complete package includes all of the items listed below The comple pp ication package should be submitted to the appropriate DWQ Office (Appropriate office maybe found by locating project on the interactive online map at http //h2o enr state nc us/su/msi maps htm) 1 Please indicate that you have provided the following required information by mitialmg in the space provided next to each item Inth • Original and one copy of the Stormwater Management Permit Application Form • Original and one copy of the Deed Restrictions &Protective Covenants Form (if required as per Part IV above) • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP • Permit application processing fee of $505 (Express $4,000 for HD, $2,000 for LD) / payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management • Copy of any plans anlicable soils report • Two copies off plplans and specifications (sealed, signed &dated), 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 (such as additional information requests), please complete this section (ex designing engineer or firm) Designated agent (individual or firm) Cape Fear Engineering Inc Mailing Address 151 Poole Road Suite 100 City Belville State NC Zip 28451 Phone (910 1 383-1044 Fax (910 ) 383-1045 Email tom purvis@capefearengmeering com VIII APPLICANT'S CERTIFICATION I, (print or hype name of person listed in General Information, itein 2) Sheldon Tucker 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 restrichons and protechve covenants will be recorded, and that the proposed project complies with the requirements of 15A NCAC 2H 1000 , , , Signature Date 4c Q Form SWU-101 Version 09 25 08 Page 4 of Permit No SW8 060338 Modification (to be piovided b) DIt Q) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMI'l APPLICAI ION FORM VET DETENTION BASIN SUPPLEMENT This foi m may be photocopied foi use as an original DWQ Stormwater Management Plan Review A complete storniwater 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 Ocean isle Palms Phase i Contact Person Sheldon Tucker Phone Number (910 ) 612-4899 For project with multiple basins, specify which basin this worksheet applies to Pond #14 elevations Basin Bottom Elevation Permanent Pool Elevation Tentpotary Pool Elevation areas Permanent Pool Surface Area Drainage Area Impervious Area volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume Other parametei s SA/DA' Diameter of Orifice Design Rainfall Design TSS Rcmova1 2 -5 00 ft Soo It 990 ft 50,491 sq ft 51 27 ac 25 88 ac 359,604 cu ft 108,618 cu It 59,124 cu ft 1 93 4 n I in 90 % (floor of the basin) (elevation of the in tfice) (elevation of the dischaige sti actin e overfloit) (wotei surface area at the orifice elevation) (on-sde and off -site drainage to the basin) (on -site and off -site drainage to the bortn) (combined volume of main basin and forebay) (volume detained above the permanent pool) (approximately 20% of total volume) (surface area to drainage ai ea i aito from DWQ table) (2 to 5 day temporal y pool di aiv-down requn ed) (minimum 85% requu ed) Funn SWII 102 Rss 199 Pig( I ul4 Footnotes When using the Division SA/DA tables the correct SA/DA ratio for permanent pool siting should be computed based upon the actual impervious %and permanent pool depth Lmear interpolation should be employed to determine the correct Value for non- standard table entries 2 In the 20 coastal counties the requirement for a se_etative filter may be waived it the wet detention basin is designed to providt 90% TSS removal The NCDENR WOP manual provides design tables for both 8J% FSS removal and 90% l SS removal 11 REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N C Department of Environment, I fealth and Natural Resources February 1999) and Administrative Code Section 15 A NCAC 21­1 1008 Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached If the applicant has designated an agent in the Stormwater Management Permit Application Form the agent may initial below If a requirement has not been met, attach .justification The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet) The forebay volume is approximately equal to 20% of the basin volume The temporary pool controls runoff from the design storm event The temporary pool draws down in 2 to 5 days It required a 30-foot vegetative filter is provided at the outlet ( include non -erosive flow (alculations) The basin length to width ratio is greater than 3 1 I he basin side slopes above the permanent pool are no steeper than 3 1 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 A trash rack or similar device is provided for both the o� erflow and orifice A recorded drainage easement is prop ided for each basin including access to nearest right- of—way It 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 A mechanism is specified which will dram the basin for maintenance or an emergency III WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter it one is provided i This system (check one) 0 does 0 does not incorporate a vegetated filter at the outlet This sy stem (check one) 0 does 0 does not incorporate pretreatment other than a forebay Form SWU-102 Rev 3 99 Page 2 of 4 Maintenance activities shall be performed as follows After every significant runoff producing rainfall event and at least monthly 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 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 wet detention basin or stream, etc ) The measuring device used to determine the sediment elevation shall be as such that it will give an accurate depth reading and not readily penetrate into accumulated sediments When the permanent pool depth reads _ 9 75_ feet in the main pond, the sediment shall be removed When the permanent pool depth reads _9 75_ feet in the forebay, the sediment shall be removed Sediment RemovN El -1 75' Bottom Elevation \ -5 00' FOREBAY BASIN DIAGRAM ill in the blanks) Permanent Pool Elwation = 8 00 75" Sediment Removal Elevation = 175 7Y7 25% Bottom Elevation = 5 00 ?Y7 MAIN POND 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 If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency dram shall be minimized to the maximum extent practical Form SWU-102 Rev 3 99 Page 3 of 4 7 All components of the wet detention basin system shall be maintained in good working order I acknowledge and agree by my signature below that 1 am responsible for the performance of the 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 Title Sec Sheldon Tucker Address 131 Ocean Blvd West Holden Beach, NC 28462 Phone 910-612-4899 Signature Date $ o Note The legally responsible party should not be a homeowners association unless more than DO% of the lots have been sold and a resident of the subdivision has been named the president I -�rMy raX ,J Wio I/ Ij20 a Notary Public for the State of AlokJN CA/LDI N4 County of AIW PAiV0V6;g, do hereby certify that SNC20a/i!-u4Iz&2 personally appeare re me this pZj`�% day of ,,�{�Ug7 gpo7 and acknowledge the due executiop, ofet fAre of g t detention basin maintenance requirements Witness my hand and official seal, J •oUBf_IG SEAL My commission expires 670rN1 t 9' �00� Form SWU-102 Rev 3 99 Page 4 of 4 C] Permit No SW 8 060338 Modification _ (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original 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 INFORMATION Project Name Ocean Isle Palms Phase I Contact Person Sheldon Tucker Phone Number (910 ) 612-4899 For project with multiple basins, specify which basin this worksheet applies to Pond #21 elevations Basin Bottom Elevation Permanent Pool Elevation remporary Pool Elevation areas Permanent Pool Surface Area Drainage Area Impervious Area volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume Other parameters SA/DA Diameter of Orifice Design Rainfall Design TSS Removal 2 -5 00, -7 00 ft 600 ft 7 10 It 50,795 sq ft 21 16 ac 11 11 ac 280 903 cu ft 63 553 cu ft 62,416 cu ft 3 30 % 3 in 1 in 90 % (floor of the basin) (elevation of the orifice) (elevation of the discharge structure overflow) (water surface area at the orifice elevation) (on -sue and off -site drainage to the basin) (on -sue and off -sue drainage to the basin) (combined volume of main basin and forebay) (volume detained above the permanent pool) (approximately 20% of total volume) (surface area to drainage area ratto from DPVQ table) (2 to 5 day temporary pool draw -down required) (minimum 85% required) Form SWU-102 Rcv 3 99 Page 1 of 4 J Footnotes When using the Division SA/ DA tables the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth Lmcar interpolation should bt employed to determine the correct value for non standard table entries 2 In the 20 coastal counties the requirement for a vegetative filter may be �4dived if the "et detention basin is designed to provide 90% rSS removal the NCDENR BMP manual pros ides design tables for both 85%TSS ieinoval and 90%TSS removal 11 REQUIRED ITEMS CHECKLIST I he following checklist outlines design requirements per the Stormwater Best Management Practices Manual IN C Department of Environment, Health and Natural Resources February 1999) and Administrative Code Section 15 A NCAC 2H 1008 Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below If a requirement has not been met, attach justification The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet) The torebay volume is approximately equal to 20% of the basin volume The temporary pool controls runoff from the design storm event "I he temporary pool draws down in 2 to 5 days If required, a 30-foot vegetative filter is provided at the outlet ( include non -erosive flow calculations) The basin length to width ratio is greater than 3 I The basin side slopes above the permanent pool are no steeper than 3 1 A submerged and vegetated perimeter shelf w ith a slope of 6 1 or less (show detail) Vegetative cover above the permanent pool elevation is specified A trash rack or similar device is provided for both the overflow and orifice A recorded drainage easement is provided for each basin including access to nearest right - of —way 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 A mechanism is specified which will dram the basin for maintenance or an emergency III WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT Fhe wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided This system (check one) does does not incorporate a vegetated filter at the outlet This system (check one) does does not incorporate pretreatment other than a forebay Form SWU-102 ReN 3 99 Page 2 of 4 e. Maintenance activities shall be performed as follows After every significant runoff producing rainfall event and at least monthly Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition Check and clear the orifice of anv obstructions such that drawdown of the temporary pool occurs within 2 to 5 days as designed 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 wet detention basin or stream, etc ) The measunng device used to determine the sediment elevation shall be as such that it will give an accurate depth reading and not readily penetrate into accumulated sediments When the permanent pool depth reads 8 25 and 9 75 feet in the main pond, the sediment shall be removed When the permanent pool depth reads _5 25'_ feet in the forebay, the sediment shall be removed Sediment Remo El _0 7) 7> % Bottom Elevation -1 00_ FUTNETWITEM BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation = 6 00 Sediment Remo%a] Elevation = 225, 375 75% 2 Bottom Elevation = )00, 70 95% MALN POND 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 If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency dram shall be minimized to the maximum extent practical Form SWU-102 Rev 3 99 Page 3 of 4 7 All components of the wet detention basin system shall be maintained in good working order I acknowledge and agree by my signature below that 1 am responsible for the performance of the 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 Title Sc( Address Sheldon Tucker 131 Ocean Blvd West Holden Beach, NC 28462 Phone 910-61 Signature ZVZ44/ l� Date V 2 J6 7— Note I he legally responsible party should not be a homeowners association unless more than 50%of the lots have been sold and a resident of the subdivision has been named the president I �,ti1CM y ,T; ,Cy�P?40 ,a Notary Public for the State of zyt9A- 72/ Cgotp�� County of e/�.I/ /.//WoVG�_ ,do hereby certify that �l��yQ TUC1Lt72, personally appeared before me this a/"1'/ day of vc)7 and acknowledge the due execution of the for ing , detention basin maintenance requirements Witness my hand and official seal J Az �,OTAR) �a pUBL\G _ z SEAL My commission expires bGZrool— 02�7 Form SWU-102 Rev 3 99 Page 4 of 4 State Stormwater Management Systems Permit No SW8 060338M0D Ocean Isle Palms Phase 1 Page 1 of 2 Stormwater Permit No SW8 060338M0D Brunswick Countv Designer's Certification Pe-AP-y DAVIS as a duly registered PPrr-5s1DJd( apiarg- in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, OCZF /•.) ISLE PALMS PAASE I - POrJb I J (Project) F P, VT IA(, I FI Cp I It 1 for Ou--Atj ISCt PPLMSI L L C. (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 a part of this Certification Noted deviations from approved plans and specifications Signs Regi: Date SEAL MAY 1 2 2�09 1 Page 8 of 9 V, State Stormwater Management Systems Permit No SW8 060338MOD Certification Requirements P�N� �� Page 2 of 2 J 1 The drainage area to the system contains approximately the permitted SFE acreage ,Ar1A`N(D2 The drainage area to the system contains no more than the permitted SEc amount of built -upon area A7TAMM 3 All the built -upon area associated with the project is graded such that the sCt runoff drains to the system ATTuH� 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 SEE AT[4(P,z7 Trash rack is provided on the outlet/bypass structure 8 All slopes are grassed with permanent vegetation `f 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 ANA4W The permitted amounts of surface area and/or volume have been provided ✓ 12 Required drawdown devices are correctly sized per the approved plans sEE JTAgt 13 All required design depths are provided A7*4014 All required parts of the system are provided, such as a vegetated shelf, a 9E6- forebay, and the vegetated filter A15 pan required dimensions of the system are provided, per the approved cc NCDENR-DWQ Regional Office Brunswick County Building Inspections MAY 1 2 2009 Page 9 of 9 OCEAN ISLE PALMS PHASE I 5TORMWATER POND PARTIAL CERTIFICATION — POND # 14 L15T OF CLARIFICATIONS The item numbers below correspond with those on the Pond Certification checklist 2 Thi5 15 a partial certification To date, BUA within the Pond # 14 dramage area con515t5 of a few spec houses and the guard booth The roads have not been paved No other BUA has been constructed to date 3 With the exception of a few spec houses, no other structures have been constructed to date It 15 the intent of the project to grade finished centerline profiles at least eighteen inches below existing grade to facilitate the collection of 5tormwater runoff from all proposed lot5 Upon final Site Stabilization, all roof drains will be located such that runoff 15 directed to the system 4 See item 3, above 7 The outlet structure con515t5 of an orifice pipe through the berm and an emergency Spillway Per the design, the orifice has been angled downward from the normal pool to help prevent clogging Trash racks have been ordered for the 3-6 inch outlet pipes and will be m5talled per the approved plan I I The pond 15 currently acting a5 a temporary 5echment ba51n during con5tructlon The general shape of the pond has been constructed Upon final Site Stabilization, the any accumulated Sediments will be removed from the pond to the required design volume 13 The pond 15 currently acting a5 a temporary Sediment ba51n Upon final Site stabilization, all accumulated 5ediment5 will be removed from the pond and design depths will be restored 14 Th15 pond has been dC51cjned for 90% T55 removal A vegetated filter 15 not required Vegetation has been e5tabll5hed on the shelf Subsequent to its use a5 a Sediment basin and removal of accumulated 5edlment5, the forebay5 will be reshaped to reflect design grades 15 See 1 1 , above MAY 1 2 2009 P\809\809-02�Admin\5TOPMWTP\Certi ication5Yist of clanfication5 - Pond 14 doc State Stormwater Management Systems Permit No SW8 060338MOD Ocean Isle Palms Phase 1 Stormwater Permit No SW8 060338MOD Brunswick County Designer's Certification Page 1 of 2 I, �ERfZ� PAJIS as a duly registered P1Z°FESSGaN4L tN4/NEER in the State of North Carolina, having been authorized to obsery ep r- eekly/full time) the construction of the protect, — fo.p 12. (PAR�(IAC, GGj IF/(.ATo/J> o GEAQ / s to - (Project) PALMS PPASC for Oc5w W-6 PALAS3 44C- (Protect Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the protect 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 a part of this Certification Noted deviations from approved plans and specifications 5C'L A-T Acti" (,IS' of CJ.AP1r-/CATJ0 J5 Signs Regis Date SEAL MAY 1 2 2009 Paae 8 of 9 State Stormwater Management Systems Permit No SW8 060338MOD Certification Requirements P O q f Z Page 2 of 2 1 The drainage area to the system contains approximately the permitted acreage aTiI�.UeD 2 The drainage area to the system contains no more than the permitted SEE amount of built -upon area ATT�IIIED 3 All the built -upon area associated with the protect is graded such that the runoff drains to the system s Fr PTTmkG4 All roof drains are located such that the runoff is directed into the system s&Z kTLAwm5 The outlet/bypass structure elevations are per the approved plan SEE AM�LO 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- J G G' circuiting of the system AM40I 1 The permitted amounts of surface area and/or volume have been provided Sfi E Aj7Aco 12 Required drawdown devices are correctly sized per the approved plans SEC Ar7WRl3 All required design depths are provided er 5A7*46)14 All required parts of the system are provided, such as a vegetated shelf, a SEE forebay, and the vegetated filter ArTA(40 15 The required dimensions of the system are provided, per the approved plan cc NCDENR-DWQ Regional Office Brunswick County Budding Inspections MAY 1 2 2009 ' I' I Page 9 of 9 OCEAN 15LE PALMS FHA5E I 5TORMWATER POND PARTIAL CERTIFICATION — POND # 12 L15T OF CLARIFICATIONS The Item numbers below correspond with those on the Pond Certification checklist 2 This is a partial certification To date the roads have not been paved 3 No structures, other than the canoe and kayak club have been constructed to date It is the Intent of the project to grade finished centerline profiles at least eighteen Inches below existing grade to facilitate the collection of stormwater runoff from all proposed lots Upon final site stabllizatlon, all roof drains will be located such that runoff 15 directed to the system 4 See Item 3, above 5 The pond, as currently configured, is acting as a temporary sediment basin during construction The primary orifice/outlet structure has not been Installed However, the secondary outlet/emergency bypass structure 15 in place The secondary outlet is connected to a pipe network that eventually discharges to the forebay in Pond 14 The total BUA in place is significantly less than the permitted BUA for Pond 14 Once the permit modification for POND 21 15 secured and prior to paving, contractor will be completing POND 12 and constructing POND 2 1 6 As noted in item 5, above the primary outlet structure has not been installed at this time The secondary outlet structure has been installed per the plans 7 A trash rack for the secondary outlet/emergency bypass has been ordered and will be Installed per the approved plans I I The general shape of the pond has been constructed The shape of the pond will be fine-tuned subsequent to Its use as a sediment basin 12 The drawdown device will be Installed with the primary outlet structure 13 The pond is currently acting as a temporary sediment basin Upon final site stabilization, all accumulated sediments will be removed from the pond and design depths will be restored 14 This pond has been designed for 90% T55 removal A vegetated filter 15 not required 5ub5equent to its use as a sediment basin and removal of accumulated sediments, the forebays and shelf will be shaped to reflect design grades 15 See 1 1 , above MAY � 1 2oDGp' �� P \509\609 02Wdmin\5TORMWTR\Certification5\list of clanfications Pond 12 doc TRANSMISSION VERIFICATION REPORT TIME 05/22/2009 12 28 NAME NCDENR FAX 9103502018 TEL 9107967215 DATE,TIME 05/22 12 25 FAX NO /NAME 93831045 DURATION 03 02 PAGE(S) 100 RESULT OK MODE STANDARD ECM State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office Dee Freeman, Secretary Beverly Eaves Perdue, Governor FAX COVER SHEET Date ` To Co C— Q l is 2Lr C rr C Fax Re Hard cony to follow No Pages (e col cover) 1 Express Permitting From Sandra Exum Phone (21n 71 96.7261 Fax (9101350-2004 4 An Equal Opporiufuty Affirmative Acton Employer 127 Cardinal Dnve Extensinn, W+lmmgton, NC 28405 • (910) 796.721 s • ary Sent To Cc Subject Attachments Tom Purvis [tom purvis@capefearengineering com] Thursday, May 21, 2009 11 27 AM Naugle, Mary Noelle Winstead RE SW8 060338 mod Ocean Isle Palms Ph 1 ad info request COMPLETED Form_SWManagementApplication_Rev3_ page 2-5-21-09 pdf, list of clarifications - Pond 12-5-21-09 pdf Mary Jean, Attached please find pdf copies of the requested documents Thank you From Naugle, Mary [mailto mary naugle@ncdenr gov] Sent Thursday, May 21, 2009 10 49 AM To Tom Purvis Cc Noelle Winstead Subject RE SW8 060338 mod Ocean Isle Palms Ph 1 ad info request COMPLETED TOM, THANK YOU FOR YOUR REPLY PLEASE NOTE A COUPLE OF REQUESTS "IN CAPS" ON ITEMS 1 AND 4 BELOW TO DOCUMENT YOUR REPLY ON THE CORRESPONDING DOCUMENTATION IN THE APPLICATION/PERMIT THANKYOU Mary Jean Naugle NC DENR Express Permitting 910-796-7303 910-350-2004 fax Please note E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties From Tom Purvis [mailto tom purvis@capefearengineering com] Sent Thursday, May 21, 2009 10 38 AM To Naugle, Mary Cc Noelle Winstead Subject FW SW8 060338 mod Ocean Isle Palms Ph 1 ad info request Mary Jean, Please see below Should you require additional information or have any further questions please email or give us a call Since Noelle is out this week, please cc me on all correspondence so that we can ensure a timely response Best regards, Tom Purvis, P E CAPE FEAR Engineering, INC tom Purvis cDcapefearenoineering com 910 383 1044 ext 167 VFNaugle, Mary [mailto mary naugle@ncdenr gov] dnesday, May 20, 2009 3 23 PM To Noelle Winstead Cc Naugle, Mary SubJect SW8 060338 mod Ocean Isle Palms Ph 1 ad info request Noelle, Please provide the following additional information Please verify the bua and drainage area values for pond #12 The top section III (8) of the application on page 2 reports total drainage area of 1,081,159 sf with no off -site drainage area in that top section The bottom section of the same table reports 26,877 sf of off -site bua If there is off -site bua, then there should be off -site drainage area that corresponds in the top section of the table Please correct to provide consistent values This is reported as "off -site" on the application It should have been reported as "On -site RESERVE (future)" It is the difference between the permitted 443,877 sf (73 98 lots) and the 417,000 sf (69 5 lots) which we've counted and verified Can you cross out and re -write or do we need to provide a new page? PLEASE E-MAIL OR FAX A NEW PAGE THANK YOU MJ 2 Please verify that the drainage area on pond #21 went from 921,730 sf (originally permitted) to 1,093,685 sf (our revised number)and that the bua changed from 483,992sf to 561,672 sf That is correct —The addition of seven lots adds 171,955 sf to the drainage area and total BUA is 561,672 sf THANK YOU MJ 3 Please verify that the lots in each drainage area went to pond #12 with 69 5 lots confirmed, pond #14 with 125 lots confirmed, and pond #21 with 43 5 lots confirmed THANK YOU MJ 4 Regarding the partial PE certification for pond #12 if the primary outlet structure is not installed and bua is built for the club and road, please demonstrate how the intent of the stormwater system is met If there is bua installed, then the draw down device should also be installed, but the PE certification states it is not Is a skimmer installed to suffice throughout construction ? If so, please note on the PE certification notes As noted in the LIST OF CLARIFICATIONS attached to the POND 12 PARTIAL CERTIFICATION, the pond is acting as a temporary sediment basin with only the secondary outlet installed The secondary outlet is connected to a pipe network that eventually discharges to the forebav in Pond 14 The total BUA in place is significantly less than the permitted BUA for Pond 14 Once the modification is secured and prior to paving, contractor will be completing POND 12 and constructing POND 21 PLEASE ADD THIS CLARIFICATION NOTE ON THE PE CLARIFICATION PAGE AND E-MAIL OR FAX IT TOME THANK YOU MJ 5 Please verify that the original supplement for pond #12 is still good You submitted revised supplements for pond # 14 and 21, but I wanted to verify regarding #12 1 will reissue #12 from the previous permit if there are no changes That is correct— no changes THANK YOU MJ Thankyou Mary Jean ggan CAPE FEAR ' o Englneeriling, Inc. 151 Poole Road Sw1e 100 ReN fa NC M51 TEL (910) 383 1044 FAR (810) 383 1045 www capefearengmeermg com To NC DWQ Surface Water Protection State Stormwater Section 127 Cardinal Drive Ext Wilmington, NC 28405 Attu Mary Jean Naugle ❑ As Requested ❑ For Your Files ❑ Sent via Mail ❑ Sent via Courier C MAY 1 3 2009 BY Transmittal "High Density w/Detention Pond" State Stormwater Management Permit Submittal ❑ For Distribution ® For your Review / Action / Approval Quantity Drawing No Description 1 Check # $4000 00 Application Fee 3 Sets Sealed, Signed, and Dated Site Layout & Grading Plans 3 Drainage Area Plans 1 Original Application SWU-101 w/ Wet Detention Pond Supplement SWU-102 1 Original Proposed Deed Restriction Statement and Deed Restrictions 1 Copy Applicant Information from Secretary of State Corporations Database 1 Sealed, Signed, and Dated Calculations and Narrative 1 SHWT Soil Report 1 PUD Approval and Maps (vested rights) 1 Copy Wetland Delineation Survey and JD REMARKS CC File Copy 809-02 '36" Cape Fear Engineering, Inc Signed Received By Date Transmittal-MJ-Express 050409 L \Admin\PERMIT Forms\CHECKLISTS & TRANSMITTALS ceq,> E Filed Annual Report =BY -1-0-8704679 I LIMITED LIABILITY COMPANYFor year2009 ANNUAL REPORT Do not data enter manually NAME OF LIMITED LIABILITY COMPANY Ocean Isle Palms LLC STATE OF INCORPORATION NC SECRETARY OF STATE L L C ID NUMBER 0817314 NATURE OF BUSINESS Real Estate REGISTERED AGENT Saunders MarkA REGISTERED OFFICE MAILING ADDRESS 131 Ocean Blvd West Holden Beach NC 28462 REGISTERED OFFICE STREET ADDRESS 131 Ocean Blvd West Holden Beach NC 28462 Brunswick Canty PRINCIPAL OFFICE TELEPHONE NUMBER (910) 842-4939 PRINCIPAL OFFICE MAILING ADDRESS 131 Ocean Blvd [Vest Holden Beach, NC 28462 PRINCIPAL OFFICE STREET ADDRESS 131 Ocean Blvd West Holden Beach NC 28462 MANAGERS/MEMBERS/ORGANIZERS Name MarkA Saunders Title Manager Address 131 Ocean Blvd W Holden Beach NC 28462 Name Donald Howarth Title Manager Address 131 Ocean Blvd IV Holden Beach NC 28462 Name Carroll M Lipscombe Title Manager Address 131 Ocean Blvd W Holden Beach NC 28462 Name Sheldon Tucker Title Manager Address 131 Ocean Blvd IV — Holden Beach NC 28462 CERTIFICATION OF ANNUAL REPORT MUST BE COMPLETED BY ALL LIMITED LIABILITY COMPANIES Mark Saunders FORM MUST BE SIGNED BY A MANAGER/MEMBER Mark Saunders 04/15/2009 DATE Manager TYPE OR PRINT NAME TYPE OR PRINT TITLE ANNUAL REPORT FEE $200 MAIL TO Secretaryof State Corporations Division Post Office Box 29525 Raleigh, NC 27626-0525 �Hydraflow Table of Contents MAY 1 8 2009POND21042009 gpw Hydraflow Hydrographs Extension for AutoCADO Civil 3D0 2009 by Autodesk Inc v6 066 Sunday May 3 2009 Hydrograph Return Period Recap 1 1 -Year Summary Report 2 Hydrograph Reports 3 Hydrograph No 1, SCS Runoff, PRE DEVELOPMENT POND 21 3 TR-55 Tc Worksheet 4 Hydrograph No 3, SCS Runoff, Post-Dev Amenity Pond 5 TR-55 Tc Worksheet 6 Hydrograph No 4, SCS Runoff, POST DEVELOPMENT POND 21 7 TR-55 Tc Worksheet 8 Hydrograph No 6, Reservoir, Amenity Pond -Routed 9 Pond Report - Amenity Pond 10 Hydrograph No 7, Combine, Combined Developed 11 Hydrograph No 9, Reservoir, Pond 21-Routed 12 Pond Report - POND 21-FOREBAY 13 Pond Report - POND 21-MAIN POOL 14 10 -Year Summary Report 15 Hydrograph Reports 16 Hydrograph No 1, SCS Runoff, PRE DEVELOPMENT POND 21 16 Hydrograph No 3, SCS Runoff, Post-Dev Amenity Pond 17 Hydrograph No 4, SCS Runoff, POST DEVELOPMENT POND 21 18 Hydrograph No 6, Reservoir, Amenity Pond -Routed 19 Hydrograph No 7, Combine, Combined Developed 20 Hydrograph No 9, Reservoir, Pond 21-Routed 21 100 - Year Summary Report 22 Hydrograph Reports 23 Hydrograph No 1, SCS Runoff, PRE DEVELOPMENT POND 21 23 Hydrograph No 3, SCS Runoff, Post-Dev Amenity Pond 24 Hydrograph No 4, SCS Runoff, POST DEVELOPMENT POND 21 25 Hydrograph No 6, Reservoir, Amenity Pond -Routed 26 Hydrograph No 7, Combine, Combined Developed 27 Hydrograph No 9, Reservoir, Pond 21-Routed 28 RECEIVED MAY 1 3 2009 Hydrograph Return Period g���� y ra ow y graphs E#ensw Bl,�Gt y Autodesk Inc v6 066 Hyd Hydrograph Inflow Peak Outflow (cfs) Hydrograph No type Hyd(s) description (origin) 1 Yr 2 Yr 3 Yr 5-Yr 10 Yr 25 Yr 50-Yr 100 Yr 1 SCS Runoff - 1752 - - — - — - 51 92 — - - - - 85 52 PRE DEVELOPMENT POND 21 3 SCS Runoff — — 7 555 - - - - — - 1735 — 2622 Post Dev Amenity Pond 4 SCS Runoff - 3502 - — - - — - 7745 - - - — 11558 POST DEVELOPMENT POND 21 6 Reservoir 3 1 027 - - - — - 1 894 - - 2 435 Amenity Pond Routed 7 Combine 4 6 3561 - - - - - - 7890 - - 11748 Combined Developed 9 Reservoir(i) 7 3 561 — - - - - - 48 76 -- — - 9894 Pond 21 Routed Proj file POND21-04-20-09 gpw Sunday May 3 2009 F7, 2 Hydrograph Summary Re�grt AY 1 s2009 y raflow Hydrographs ExtensionCAD® Civil 3D® 2009 b Autodesk Inc v6 066 Hyd No Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Hyd volume (cult) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph description 1 SCS Runoff 1752 1 761 132 213 — -- — — PRE DEVELOPMENT POND 21 3 SCS Runoff 7 555 1 737 36 522 - Post Dev Amenity Pond 4 SCS Runoff 3502 1 740 183 961 - - POST DEVELOPMENT POND 21 6 Reservoir 1 027 1 801 34 662 3 20 78 19 663 Amenity Pond Routed 7 Combine 3561 1 740 218 624 4 6 - - Combined Developed 9 Reservoir(i) 3 561 1 955 90 651 7 843 160 841 Pond 21 Routed POND21-04-20-09 gpw Return Period 1 Year Sunday May 3, 2009 _ Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD® Civil 3130 2009 by Autodesk Inc v6 066 Hyd No 1 PRE DEVELOPMENT POND 21 Hydrograph type = SCS Runoff Storm frequency = 1 yrs Time interval = 1 min Drainage area = 25 110 ac Basin Slope = 1 3 % Tc method = TR55 Total precip = 3 70 in Storm duration = 24 hrs MAY 1 3 2009 3 May 3 2009 Peak discharge = 17 52 cfs Time to peak = 761 min Hyd volume = 132,213 cuft Curve number = 75' Hydraulic length = 2280 ft Time of conc (Tc) = 56 00 min Distribution = Type III Shape factor = 484 Composite (Area/CN) = ((2 690 x 74) + (7 480 x 70) + (3 830 x 80) + (11 110 x 77)) / 25 110 Q (cfs) 1800 1500 1200 • m . e, 300 PRE DEVELOPMENT POND 21 Hyd No 1 -- 1 Year 000 1 1 0 120 240 360 480 600 Hyd No 1 Q (cfs) 1800 1500 1200 . We 300 ' ' ' ' ' ' i �] 000 720 840 960 1080 1200 1320 1440 1560 Time (min) _ TR55 Tc Worksheet I� MAY 1 3 2009 I 4 Hydraflow Hydrographs Extension for Hyd No 1 PRE DEVELOPMENT POND 21 Description A B C Totals Sheet Flow Manning's n-value = 0 400 0 011 0 011 Flow length (ft) = 1000 00 00 Two-year 24-hr preclp (In) = 450 000 000 Land slope (%) = 050 000 000 Travel Time (min) = 31 53 + 000 + 000 = 31 53 Shallow Concentrated Flow Flow length (ft) = 213000 000 000 Watercourse slope (%) = 081 000 000 Surface description = Unpaved Paved Paved Average velocity (ft/s) = 1 45 000 000 Travel Time (min) = 2445 + 000 + 000 = 2445 Channel Flow X sectional flow area (sqft) = 000 000 000 Wetted perimeter (ft) = 000 000 000 Channel slope (%) = 000 000 000 Manning's n-value = 0 015 0 015 0 015 Velocity (ft/s) = 000 000 000 Flow length (ft) = 00 00 00 Travel Time (min) = 000 + 000 + 000 = 000 Total Travel Time, Tc 56 00 min Inc v6 066 Hydrograph Report MAY 1 3 2009 Hydrallow Hydrographs Extension for AutoCAD® Civil 3170 2009 by Autodesk Inc v6 066 Hyd No 3 Post-Dev Amenity Pond Hydrograph type = SCS Runoff Storm frequency = 1 yrs Time interval = 1 min Drainage area = 4 420 ac Basin Slope = 0 0 % Tc method = TR55 Total precip = 3 70 in Storm duration = 24 hrs Composite (Area/CN) = [(1 850 x 98) + (1 040 x 74) + (1 530 x 80)] / 4 420 Q (cfs) 800 . M 01 0 00 0 120 240 Hyd No 3 Post-Dev Amenity Pond Hyd No 3 -- 1 Year 360 480 600 720 May 3 2009 Peak discharge = 7 555 cfs Time to peak = 737 min Hyd volume = 36,522 cuft Curve number = 86* Hydraulic length = 0 ft Time of conc (Tc) = 23 90 min Distribution = Type III Shape factor = 484 Q (cfs) 800 . rr 400 200 000 840 960 1080 1200 1320 1440 1560 Time (min) 0 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Hyd No 3 Post-Dev Amenity Pond MAY 1 3 2009 10 Civil 31D® 2009 by Description A B C Totals Sheet Flow Manning's n-value = 0 400 0 011 0 011 Flow length (ft) = 1000 00 00 Two-year 24-hr precip (in) = 450 000 000 Land slope (%) = 1 00 000 000 Travel Time (min) = 2389 + 000 + 000 = 2389 Shallow Concentrated Flow Flow length (ft) = 000 000 000 Watercourse slope (%) = 000 000 000 Surface description = Paved Paved Paved Average velocity (ft/s) = 000 000 000 Travel Time (min) = 000 + 000 + 000 = 000 Channel Flow X sectional flow area (sqft) = 000 000 000 Wetted perimeter (ft) = 000 000 000 Channel slope (%) = 000 000 000 Manning's n-value = 0 015 0 015 0 015 Velocity (ft/s) = 000 000 000 Flow length (ft) = 00 00 00 Travel Time (min) = 000 + 000 + 000 = 000 Total Travel Time, Tc 23 90 min Inc v6 066 Hydrograph Report I Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2009 by Autodesk Inc v6 066 Hyd No 4 POST DEVELOPMENT POND 21 Hydrograph type = SCS Runoff Storm frequency = 1 yrs Time interval = 1 min Drainage area = 20 670 ac Basin Slope = 1 0 % Tc method = TR55 Total precip = 3 70 in Storm duration = 24 hrs Composite (Area/CN) = [(11 040 x 98) + (3 900 x 74) + (5 730 x 80)] / 20 670 Q (Cfs) 4000 3000 2000 1000 0 00 0 120 240 Hyd No 4 MAY 1 3 2009 7 May 3 2009 Peak discharge = 35 02 cfs Time to peak = 740 min Hyd volume = 183,961 cuft Curve number = 88* Hydraulic length = 2245 ft Time of conc (Tc) = 29 30 min Distribution = Type III Shape factor = 484 POST DEVELOPMENT POND 21 Hyd No 4 --1 Year 360 480 600 720 840 Q (Cfs) 4000 3000 2000 1000 960 1080 1200 1320 1440 1560 Time (min) TR55 Tc Worksheet I MAY 1 3 2009 I 8 Hydraflow Hydrographs Extension for Hyd No 4 POST DEVELOPMENT POND 21 Description A Sheet Flow Manning's n-value = 0 410 Flow length (ft) = 1000 Two-year 24-hr preclp (In) = 450 Land slope (%) = 1 00 Travel Time (min) = 2437 Shallow Concentrated Flow Flow length (ft) = 24000 Watercourse slope (%) = 200 Surface description = Paved Average velocity (ft/s) = 287 Travel Time (min) = 1 39 Channel Flow X sectional flow area (sgft) = 353 Wetted perimeter (ft) = 471 Channel slope (%) = 080 Manning's n-value = 0 013 Velocity (ft/s) = 845 Flow length (ft) = 18130 Travel Time (min) = 358 Total Travel Time, Tc Autodesk Inc v6 066 B C Totals 0 011 0 011 00 00 000 000 000 000 + 000 + 000 = 2437 000 000 000 000 Paved Paved 000 000 + 000 + 000 = 1 39 000 000 000 000 000 000 0 015 0 015 000 000 00 00 + 000 + 000 = 3 58 29 30 min Hydrograph Report Hydraflow Hydrographs Extension for AutoCADP Civil 3D9 2009 by Autodesk. Inc v6 066 lb �=_--- — Sunday. May 3, 2009 Hyd. No. 6 Amenity Pond -Routed Hydrograph type = Reservoir Peak discharge = 1.027 cfs Storm frequency = 1 yrs Time to peak = 801 min Time interval = 1 min Hyd. volume = 34,662 cult Inflow hyd. No. = 3 - Post-Dev Amenity Pond Max. Elevation = 2078 ft Reservoir name = Amenity Pond Max. Storage = 19,663 cuft Storage Indication method usec Q (cfs 800 6 00 m 200 rrra Amenity Pond -Routed Hyd. No 6 -- 1 Year i I I � I i j I I i I 0 300 600 900 1200 1500 1800 2100 2400 2700 — Hyd No 6 Hyd No 3 Total storage used = 19,663 cuft Q (cfs) 800 we] 400 200 3000 Time (min, 10 Hydraflow Hydrographs Extension for AutoCACC-) Civil 3Dai 2009 by Autodesk, Inc v6 066 -_. Sunday, May 3. 2009 Pond No. 3 - Amenity Pond - Pond Data Contours - User -defined contour areas. Average end area method used for volume calculation Begining Elevation = 2000 ft Stage I Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (tuft) Total storage (tuft) 0.00 20 00 23,266 0 0 100 2100 27,055 25,161 25,161 200 2200. 30,360 28.708 53.868 300 23.00 33,709 32,035 85,903 4.00 24.00 37,123 35.416 121.319 5.00 25.00 40,623 38,873 160.192 Culvert I Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 24 00 8.00 0.00 0.00 Crest Len (ft) = 1600 0.00 0.00 0.0c Span (in) = 24.00 800 0.00 000 Crest El. (ft) = 24.00 000 000 000 No. Barrels = 1 1 0 0 Weir Coeff. = 3.33 3.33 3.33 3.33 Invert El. (ft) = 2000 2000. 000 000 Weir Type = Riser Length (ft) = 190.00 0.00 0.00 000 Multi -Stage = Yes No No No Slope (%) = 0.30 0.00 0.00 n/a N-Value = 013 013 013 n/a Orifice Coeff. = 060 060 0 60 0.60 Exfii.(in/hr) = 0 000 by Wet area) Multi -Stage = n/a Yes No No TW Elev. (ft) = 000 No.e "'I „/Jrf,a'�u f.i sa .anxly 1i..a Stage / Storage / Discharge Table Stage Storage Elevation CIv A Clv B Civ C PrfRsr Wr A Wr B Wr C Wr 0 Exfil User Tota ft tuft ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 0.00 0 2000 0 00 000 --- --- 000 ----- --- -- --- 0.00( 1.00 25,161 21.00 1.26 is 1.25 is --- --- 0.00 --- -- --- --- --- 1.24f 2.00 53,868 22. 00 2.00 oc 2.00 is - --- 0.00 --- --- --- --- --- 2.00( 3.00 85,903 23.00 2 65 oc 2.56 is --- --- 000 --- --- --- --- --- 2. 56: 400 121,319 24.00 3.06 oc 3.04 is --- --- 0.00 --- --- --- --- --- 3.03E 5.00 160. 192 25 00 24.02 oc 0.48 is -- --- 23 53 s --- --- --- -- --- 2401 Hydraflow Hydrographs Extension for AUroCAD,� Civil 3D:PJ 2009 ny Autodesk, Inc v,6066 Hyd. No. 7 Combined Developed Hydrograph type = Combine Storm frequency = 1 yrs Time interval = 1 min Inflow hyds. = 4, 6 Combined Developed 11 Sunday.. May 3, 2009 Peak discharge = 35.61 cfs Time to peak = 740 min Hyd. volume = 218,624 cuft Contrib. drain. area= 20.670 ac Q (cfs) Q (cfs) Hyd No 7 -- 1 Year 4000 4000 � I j I 3000 30 00 I 2000 2000 I I I l 1000 10.00 0 00 0,00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) — Hyd No 7 Hyd No 4 — Hyd No 6 Hydrograph Report Hydraflow Hydrographs Extension for AutoCADO Civil 3DkP 2009 by Autodesk, Inc. v6 066 Hyd. No. 9 Pond 21-Routed Hydrograph type = Reservoir (Interconnected) Storm frequency = 1 yrs Time interval = 1 min Upper Pond Pond name = POND 21-FOREBAY Inflow hyd. = 7 - Combined Developed Max. Elevation = 8.43 ft Max. Storage = 56,452 cult Interconnected Pond Routing. Storage Indication method used Q (cfs) 40.00 3000 2000 10.00 0,00 0 300 60 Hyd No 9 Outflow Pond 5 Pond 21-Routed Hyd No 9 -- 1 Year 12 Sunday. May 3. 2009 Peak discharge = 3.561 cfs Time to peak = 955 min Hyd. volume = 90,651 cult LowerPond Pond name = POND 21-MAIN PO( Other Inflow hyd. = None Max. Elevation = 8.16 ft Max. Storage = 104,388 cult 900 1200 1500 1800 2100 2400 2700 — Hyd No, 7 Total ,forage used = 160,841 tuft Q (cfs) 40.00 30 00 20 00 1000 — 000 3000 Time (min) Pond Report i 13 Hydraflow Hydrographs Extension for AutoCAD@ Civil 31DO 2009 by Autodesk. Inc. v6.066 1 { ., � Sunday, May 3, 2009 Pond No. 5 - POND 21-FOREBAY Pond Data Contours - User -defined contour areas. Average end area method used for volume calculation. Begining Elevation = 6.00 ft Stage / Storage Table Stage (ft) Elevation (ft) 000 600 1.00 700 200 800 300 900 400 10 00 Contour area (sgft) 20,632 22,824 25 125 27,450 29 874 Incr. Storage (tuft) 0 21,728 23.975 25, 288 28,662 Total storage (cuff) 0 21, 728 45.703 71 990 100.652 Culvert / Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 36.00 000 0.00 0 00 Crest Len (ft) Inactive 0.00 000 0.00 Span (in) = 36 00 0.00 0.00 0.00 Crest EL (ft) = 8.50 0.00 000 0.00 No. Barrels = 4 0 0 0 Weir Coeff. = 2.60 3.33 3 33 3 33 Invert El. (ft) = 6 13 0.00 0.00 000 Weir Type = Broad --- --- Length (ft) = 107 00 0.00 0 00 000 Multi -Stage = No No No No Slope I%) = 0 10 0.00 000 nia N-Value = 013 013 013 ale Orifice Coeff. = 060 060 0.60 060 Exfil.(inihr) = 0 000 (by Wet areal Multi -Stage = n/a No No No TW Elev. (11 = 0 00 Nol C.ivnnrtnrd ,j, �nietp ) and 1u11.T I' . V,nr .,t „Meci,nC=h of ..e �o Jieans'e nw oub^erg5rre e Stage / Storage / Discharge Table Stage Storage Elevation Civ A CIv B Clv C PrfRsr Wr A Wr B Wr C Wr D Exfil User Total It cuff ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cis cfs 0.00 0 Soo 0.00 --- -- -- DOD -- --- --- --- --- 0 000 1.00 21.728 7.00 11.29 oc --- --- --- 000 --- --- --- --- --- 11 29 2.00 45.703 800 33.84 oc --- --- --- 000 --- --- --- --- --- 33.84 300 71, 990 900 49.98 oc --- --- --- 0.00 --- --- --- --- --- 49.98 4 00 100.652 10 00 151.14 oc --- --- --- 000 --- --- --- --- --- 151.14 Pond Report 1 14 Hydraflow Hydrographs Extension for AutoCAD0 Civil 3DO) 2009 by Autodesk, Inc v6 066 ; - - Surgday, May 3.. 2009 Pond No. 7 - POND 21-MAIN POOL Pond Data Contours - User -defined contour areas. Average end area method used for volume calculation Begining Elevation = 6 00 ft Stage 1 Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (tuft) Total storage (tuft) 000 6.00 41,911 0 0 1.00 7.00 48,917 45,414 45,414 2 DO 8 00 52.248 50,583 95.997 300 900 55,622 53,935 149,932 4.00 10.00 59, 039 57,331 207,262 Culvert/ Orifice Structures Weir Structures [A) [B] [C] [PrfRsr] [A] [131 [C] [D] Rise (in) = 18.00 3.00 Inactive 0.00 Crest Len (ft) = 16.00 5000 Inactive 0.00 Span (in) = 18 00 3 DO 24.00 0 00 Crest El. (ftl = 800 850 900 000 No. Barrels = 1 1 2 0 Weir Coeff. = 3.33 2 60 2.60 3 33 Invert El. (ft) = 6 00 6 10 700 0 00 Weir Type = Riser Broad Broad --- Length (ft) = 52.00 000 000 0.00 Mufti -Stage = Yes No No No Slope (%) = 0.02 0.00 000 nia N-Value = 013 013 013 Na Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfll.(in/hr) = 0 000 (by Wet area) Mufti Stage = nla Yes Yes No TW Elev. (ft) = 0.00 Stage / Storage / Discharge Table Stage Storage Elevation ON A Clv B ON C PrfRsr Wr A Wr B Wr C Wr D Exfil User Total ft tuft ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs coo 0 6.00 0.00 0 00 0.00 --- 000 000 0.00 --- --- --- 0 000 1 00 45,414 700 0 19 oc 0 18 is 000 --- 000 000 000 --- --- --- 0 182 2 00 95, 997 800 0.29 oc 0.29 is 0.00 --- coo 0.00 0.00 --- --- --- 0.285 3.00 149.932 900 11.12 oc 0 03 is 0.00 --- 11.07 s 45 96 0.00 -- --- --- 57.06 4.00 207,262 10.00 14.38 oc 0.00 0.00 --- 0.00 238. 83 0.00 --- --- --- 253.21 Hydrograph Summary Re15 PQartw Hydrographs Extension for AutoCAIY! Civil 3DE 2009 by Autodesk Inc v6 066 Hyd. No. Hydrograph type (origin) Peak Time flow interval (cfs) (min) Time to Hyd. peak j volume (min) (tuft) Inflow hyd(s) MaximuM'----�1`6ta� Hydrograph elevation singe used description (ft) (tuft) 1 SCS Runoff 51.92 1 758 379.608 ------ ---- ------ PRE DEVELOPMENT POND 21 3 SCS Runoff '.� 1735 1 736 86,091 ------ ------ ------ Post-Dev Amenity Pond 4 SCS Runoff 7745 1 740 419,689 ------ ------ ------ POST DEVELOPMENT POND 21 6 Reservoir 1 894 1 819 83,838 3 2184 49 166 Amenity Pond -Routed 7 Combine 78 90 1 740 503,526 4, 6 ------ ------ Combined Developed 9 i Reservofr(i) 4876 1 i 763 372.060 7 '',. 9.27 226. D48 Pond 21-Routed I I ( I POND21-04-20-09 gpw Return Period 10 YearI Sunday. May 3. 2009 16 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD(�) Civil 300 2009 by Autodesk. Inc v6.066 Sunday May 3 2009 Hyd. No. 1 PRE DEVELOPMENT POND 21 Hydrograph type = SCS Runoff Peak discharge = 51.92 cfs Storm frequency = 10 yrs Time to peak = 758 min Time interval = 1 min Hyd. volume = 379,608 cuft Drainage area = 25.110 ac Curve number = 75` Basin Slope = 1.3 % Hydraulic length = 2280 ft Tc method = TR55 Time of conc. (Tc) = 56.00 min Total precip. = 7.00 in Distribution = Type III Storm duration = 24 hrs Shape factor = 484 Composite (AreaiCN) = ((2.690 x 74, + (7.480 x 70) + (3 830 x 80) + (11 110 x 77)] l25 110 Q (cfs) 6000 50 00 4000 3000 20.00 1000 0.00 - PRE DEVELOPMENT POND 21 Hyd No 1 -- 10 Year 0 120 240 360 480 600 720 840 - Hyd No 1 Q (cfs) 6000 50,00 40.00 30.00 20.00 10.00 0.00 960 1080 1200 1320 1440 1560 Time (min) Hydraflow Hyorographs Extension for AutoCAD� Civil 3DL 2009 by Autodesk. Inc v6 066 Hyd. No. 3 Post-Dev Amenity Pond Hydrograph type = SCS Runoff Storm frequency = 10 yrs Time interval = 1 min Drainage area = 4.420 ac Basin Slope = 0.0 % Tc method = TR55 Total precip. = 7.00 in Storm duration = 24 hrs Composite tArea;CN) = I(l 850 x 98) + (t 040 x 74) « (r 530 x 80j1 / 4.420 Post-Dev Amenity Pond 17 May 3, 2009 Peak discharge = 17.35 cfs Time to peak = 736 min Hyd. volume = 86,091 cuft Curve number = 86` Hydraulic length = 0 ft Time of conc. (Tc) = 23.90 min Distribution = Type III Shape factor = 484 Q (cfs) Q (cfs) Hyd. No 3 -- 10 Year 1800 1800 i i 1500 ! 1500 12.00 t 1200. I I � 9 00 MID 600 ( ! 600 3.00 300 j MO j 000 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) — Hyd No 3 18 Hydrograph Report Hydraflow Hydrographs Extension for AutoCADn Gull 3DT) 2009 by Autodesk, Inc v6 066 Hyd. No. 4 Sunday, May 3, 2009 POST DEVELOPMENT POND 21 Hydrograph type = SCS Runoff Peak discharge = 77.45 cfs Storm frequency = 10 yrs Time to peak = 740 min Time interval = 1 min Hyd. volume = 419,689 cuft Drainage area = 20.670 ac Curve number = 88` Basin Slope = 1.0 % Hydraulic length = 2245 ft Tc method = TR55 Time of conc. (Tc) = 29.30 min Total precip = 7.00 in Distribution = Type III Storm duration = 24 hrs Shape factor = 484 ' Composite (Area/CN) _ [(11.040 x 98) + (3.900 x 74) (5.730 x 80)i l 20 670 POST DEVELOPMENT POND 21 Q (cfs) Hyd No 4 — 10 Year Q (cfs) 8000 80.00 7000 7000 i 60,00 60,00 5000 50,00 4000 40.00 ' 3000 3000 20 00 i 2000 10 00 1000 I 0,00 - 000 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) -�--� Hyd No 4 Hydrograph Report V-F_ ` 19 Hydraflow Hydrographs Extension for AutoCADE,, Civil 3D(P,' 2009 by Autodesk. Inc A 0t Sunday. May 3. 2009 Hyd. No. 6 BI _— Amenity Pond -Routed Hydrograph type = Reservoir Peak discharge = 1.894 cfs Storm frequency = 10 yrs Time to peak = 819 min Time interval = 1 min Hyd. volume = 83,838 cult Inflow hyd. No = 3 - Post-Dev Amenity Pond Max. Elevation = 21.84 ft Reservoir name = Amenity Pond Max. Storage = 49,166 cuft Storage Indication method used Amenity Pond -Routed Q (cfs) Hyd. No 6 -- 10 Year 18 00 I I � 1500 i i 1200 9 00 3 00 I 0.00 Q (Cfs) 18.00 1500 1 1200 1 will] WIrI11 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 Time (min) ® Hyd No 6 Hyd No 3 Total storage used = 49.166 cult Hydrograph Report 20 Hydraflow Hydrographs Extension for AutoCAD(+) C,I 3DS 2009 by Autodesk. Inc v6 066'ip ---- Sunday. May 3. 2009 Hyd. No. 7 Combined Developed Hydrograph type = Combine Peak discharge = 78.90 cfs Storm frequency = 10 yrs Time to peak = 740 min Time interval = 1 min Hyd. volume = 503,526 cuft Inflow hyds. = 4, 6 Contrib. drain. area= 20.670 ac Combined Developed Q Ids) Q (OS)Hyd No 7 -- 10 Year 8000 8000 70.00 I 7000 I i I i 60.00 6000 i 50.00 5000 4000 4000 I I I 30.00 ( 3000 I i I 20.00 2000 1000 10.00 0.00 000 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 7 - Hyd No. 4 Hyd No 6 Time (min) 21 Hydrograph Report Hydraflow Hydrographs Extension for AutoCADFd Civil 312009 by Autodesk, Inc v6 066 Hyd. No. 9 Pond 21-Routed Hydrograph type = Reservoir (Interconnected) Storm frequency = 10 yrs Time interval = 1 min Upper Pond Pond name = POND 21-FOREBAY Inflow hyd. = 7 - Combined Developed Max. Elevation = 9.27 ft Max. Storage = 79,446 cult Interconnected Pond Routing. Storage Indication method used Q (cfs) 8000 7000 5000 40 00 30,00 20,00 10.00 Pond 21-Routed Hyd. No 9 -- 10 Year --_ " Sunday.. May 3, 2009 Peak discharge = 48.76 cfs Time to peak = 763 min Hyd. volume = 372,060 cult Lower Pond Pond name = POND 21-MAIN P0( Other Inflow hyd. = None Max. Elevation = 8.94 ft Max. Storage = 146,602 cult MID 0 180 360 540 720 900 1080 1260 1440 1620 — Hyd No 9 - Hyd No. 7 Total Storage used = 226,048 tuft ----- Outflow Pond 5 Q (cfs) 8000 7000 50 00 4000 3000 2000 1000 _-L 0 00 1800 Time (min) �,.� -fr � Hydrograph Summary Re Rydra�flow Hydrographs Extension r AutoCADkU C,Vd 3De 2009 by Autodesk PRE Inc v6 066 Hyd No. Hydrograph type (origin) Peak flow (cfs) ITime interval (min) I Time to peak (min) '�,.. Hyd. I,.I volume (cuft) ' Inflow Maximum Total hyd(s) elevation mrge used (ft) (cuft) Hydrograph description 1 SCS Runoff 85 52 1 757 629, 156 ------ ------ ----- PRE DEVELOPMENT POND 21 3 SCS Runoff 2622 1 736 132865 ------ ------ ------ 1 Post-Dev Amenity Pond 4 SCS Runoff 115 58 1 739 I 640.121 ----------------- POST DEVELOPMENT POND 21 6 Reservoir 2.435 1 839 130.228 3 2275 78.053 Amenity Pond -Routed 7 Combine 117.48 1 739 770,349 4, 6 ----- ----- Combined Developed 9 Reservoir(i) 98.94 Ili I 1 I i 753 635,622 7 9.84 261,090 � � i I i Pond 21-Routed I i I POND21-04-20-09 gpw Return Period: 100 Year Sunday, May 3, 2009 Hydrograph Report Hydral Hydrographs Extension for AutoCAl— Civil 3D® 2009 by Autodesk. Inc. v6 066 Hyd. No. 1 PRE DEVELOPMENT POND 21 Hydrograph type = SCS Runoff Storm frequency = 100 yrs Time interval = 1 min Drainage area = 25.110 ac Basin Slope = 1.3 % Tc method = TR55 Total precip. = 10.00 in Storm duration = 24 hrs Sunday, May 3, 2009 Peak discharge = 85.52 cfs Time to peak = 757 min Hyd. volume = 629,156 cult Curve number = 75' Hydraulic length = 2280 ft Time of cone. (Tc) = 56.00 min Distribution = Type III Shape factor = 484 Composite (Area/Cl = [12 690 x 74) + (7 480 x 70) + (3 830 x 80) + (11 110 x 77)1t 25 110 Q (cfs) 9000 8000 7000 6000 5000 4000 30.00 2000 10.00 PRE DEVELOPMENT POND 21 Hyd No 1 -- 100 Year Q (cfs) 9000 8000 7000 60.00 50.00 40,00 30,00 20.00 1000 0.00 1 1 1 1 1 1 1 1 1 11 1 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) —�— Hyd No 1 24 Hydrograph Report Hyd.Nu 3 Pnm-DevAmenity Pond Hydrographty= SCS Runoff Peak discharge = 2622cfs Storm frequency = 100ys Time tnpeak = 736min Time interval =1min Hvdvn|ume =13e.oeoouft Drainage area = 4420a: Curve number = Os' Basin Slope = 00% Hydraulic length = Oft To method = TR55 Time ofconc. (Tc) = uzgOmin Tota|pnacip. = 10.00in Distribution = Type III Storm duration = z*xrs Shape factor = 484 Composite *reamw~wem^**~nmw^,+~v5m^mw'4 420 post-Dev Amenity Pond Q lcfs) Hyd wno-1ooYear o(Cfs) uaou 28,00 2400 2400 2000 2000 1600 1aM 1zou 1200 oon 8,00 400 4»o o� o� o 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) ~�~Hvuwo3 25 Hydrograph Report j Hydraflow Hydrographs Extension for AutoCAD(N Civil 3D6 2009 by Autodesk. Inc. v6 066 Hyd. No. 4 POST DEVELOPMENT POND 21 Hydrograph type = SCS Runoff Storm frequency = 100 yrs Time interval = 1 min Drainage area = 20.670 ac Basin Slope = 1.0 % Tc method = TR55 Total precip. = 10.00 in Storm duration = 24 hrs Composite (ArealCN) = if 1 1 040 x 98) t Q 900 x 74) - (5 730 x 80)) / 20.670 Q (cfs 120 00 100.00 8000 Won 40.00 20 00 May 3, 2009 Peak discharge = 115.58 cfs Time to peak = 739 min Hyd. volume = 640,121 cuft Curve number = 88' Hydraulic length = 2245 ft Time of conc. (Tc) = 29.30 min Distribution = Type III Shape factor = 484 POST DEVELOPMENT POND 21 Hyd. No. 4 -- 100 Year JI I I I i j I j i i I I I I j I I I I I I , I I I I 0 00 0 120 240 m--- Hyd No 4 Q (cfs) 120.00 10000 4000 20.00 000 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hydrograph Report Hydraflow Hydrographs Extension For AutoCAD® Civil 3DO 2009 by Autodesk, Inc. v6 066 Hyd. No. 6 Amenity Pond -Routed Hydrograph type = Reservoir Storm frequency = 100 yrs Time interval = 1 min Inflow hyd. No. = 3 - Post-Dev Amenity Pond Reservoir name = Amenity Pond Storage Indication method used 26 Sunday. May 3. 2009 Peak discharge = 2.435 cfs Time to peak = 839 min Hyd. volume = 130,228 cuft Max. Elevation = 22.75 ft Max. Storage = 78,053 cuft Amenity Pond -Routed 0 (cfs) Hyd. No. 6 -- 100 Year 28.00 i 2400 2000 1600 I j I j 1200 I I 800 I j I 400 0.00 0 (cfs) 28,00 2400 20,00 1600 12.00 800 400 n nn 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 Time (min) Hyd No 6 Hyd No 3 Total storage used = 78.053 tuft 27 Hydrograph Report Hydraflow Hydrographs Extension for AutoCADr- Civil 3D4> 2009 by Autodesk. Inc v6 0661i}iy : ,. _ _ _._ Sunday May 3 2009 Hyd. No. 7 Combined Developed Hydrograph type = Combine Peak discharge = 117.48 cfs Storm frequency = 100 yrs Time to peak = 739 min Time interval = 1 min Hyd. volume = 770,349 cuft Inflow hyds. = 4, 6 Contrib. drain. area= 20.670 ac Combined Developed Q (cfs) Q (cfs) Hyd No 7 -- 100 Year 120.00 120 00 I i i q I 10000 100.00 I I I I i I I i i i 8000 8000 I III, I 60 00 6000 �I I I I 40.00 4000 I I I I 2000 20.00 i i I I I i I i I I 0.00 000 0 180 360 540 720 900 1080 1260 1440 1620 Time (min) �— Hyd No 7 Hyd No 4 — Hyd No 6 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD(R) Civil 3D.7 2009 by Autodesk, Inc v6 066 Hyd. No. 9 Pond 21-Routed Hydrograph type = Reservoir (Interconnected) Storm frequency = 100 yrs Time interval = 1 min Upper Pond Pond name = POND 21-FOREBAY Inflow hyd. = 7 - Combined Developed Max. Elevation = 9.84 ft Max. Storage = 96,049 cuft Interconnected Pond Routing Storage Indication method used 28 Sunday.. May 3. 2009 Peak discharge = 98.94 cfs Time to peak = 753 min Hyd. volume = 635,622 cuft Lower Pond Pond name = POND 21-MAIN PO( Other Inflow hyd. = None Max. Elevation = 9.26 ft Max. Storage = 165,041 cuft Pond 21-Routed O (cfs) Hyd No 9 -- 100 Year O (cfs) 12000 12000 I j j I 100,00 100.00 j I � I 8000 8000 j I � i 6000 6000 j ( 40-00 4000 j j 2000.2000 i I I _ 000 m 000 0 180 360 540 720 900 1080 1260 1440 1620 1800 - Hyd No 9 Hyd No 7 Total storage used = 261,090 cult Time (min) Outflow Pond 5 101E AiRGV CLASSss fi7AC11/ AV"wrrfau � or arra/s�+w/� ///rr/r/umaua qq\lrm/A�rr��rr//r/q/mamr /so/vmm.:wrrrrrrgmrq/m ' ®bra\�rgrrr//rr►�r/qugrrarrrr nI/a/.�/rr/r/rr//►rrrrm/rq/ra/ q\r/rUrrr rgrrr rr V rar/rrri. rr�\Nrr,�/rrq.T'R�r6�ggaGa�\Yirm T.I�r ra/ aUrgr►rrr/rii►Yirq►1m////'�/aa /r/�grr►�rrrr/li/r/rr/Orrrrra/aq rrr�rmr�wr//rgrrr/h`Arrrraa rrrr�mrr►w+/rurrrruuagrrrrrr /gn�au/r►raear/rrao/.-�rrgrr ' errr/p/qu.�arc�rrgrarr�. rgrr►vrtr/ao///rA+rrgrr/r���a rag rnru/OrmrO/rrrr/wqr/q//aEN rl�rrrrU/a/rrr/Orgrrra B rrgrarrggq►vrrmr///�•ra �_+arrrr/ urrmr/rarrrrr�.�rrrarumrr.c a►wrrrorrrr/rrr//.�/ro%r.I.�e/rr/o m•arrw.�a/n�a�mc�grrrgrrm q/\�rrgrr►/rr-�rrgrruc®/rrr/ rrrrgr� e;!rramrrmmg��rmrra a/rnrn+rrragrqu/grr/wrraq rgr/�rrragrmrrramrr,�rrrr rrrrramrmr/arr/rrormrrrrrrc mgrgrrNrrrr•mrugrrmrrrr /rrrrp�r/arrgr►`//rggr/arau ra/rrn�/rq/arrr�7rNgrarrOa rgmr��/rrrrgru.nnraorrq m/ggowuair�r��i a . L rove wave ar Avxcw' B.aPess PF siafE I 57dE FIVE f 4 X P B" ? B7dF LXNT rr .zy,E lLarAy rr a X D re' + 57CYE NFAK 1!' B X P jr 6 S/CMC' TEAK � 10 X D Rl a VW'EAK ZT' fX X D .ID' uateEs cAinz>P SJ@E 47 AAO/WT f1PE rrAl� Hbarrr � r�1 ss�trAmNB RIP -RAP CLASS`f s - zm � �liasr� far SKUL � tM NOra zOL CLASS X - 750 AT LEW Ia7 �E.�s+oe Mgp/ LESS iNAN 60 f9S �RosfcN ccNrnoc sroNE a.ass A °f� versm QAL B (6 - .1W AD OPADA]AM 9fn'!A �' c ,,� r ; j , t. � � , r�;-•1 r , . T�ai<c - � E�E � � I E t� � (l �' " � � t-7• rid 6AT Tl (7I��, `�.( J� �-orG �f�y:urth �ciLr�tf�r�s s•.�rH� /`6"�k' U«�!d%IL(f t�H�E �, - (r /, e k•P FtLt7-7" _ Channel Report Hydraflow Express Extension for AutoCADT Civil 361J 2009 by Autodesk, Inc POND 21 - OUTLET STRUCTURE Circular Diameter (ft) = 18.00 Invert Elev (ft) = 6.00 Slope (%) = 0.02 N-Value = 0.013 Calculations Compute by: Known Q Known Q (cfs) = 12.00 Section F.i[Q11 14y May 3 2009 Highlighted Depth (ft) = 1.31 Q (cfs) = 1200 Area (sqft) = 8.46 Velocity (ftls) = 1.42 Wetted Perim (ft) = 9.90 Crit Depth, Yc (ft) = 0.68 Top Width (ft) = 9.41 EGL (ft) = 1.34 Depth (ft) 21 00 18.00 15,00 18 00 12.00 i I 15.00 9.00 12.00 — 600 I i 900 — 300 600 000 300 -3,00 0 2 4 6 8 10 12 14 16 18 20 22 Reach (ft) RECEYVF,D MAY 1 3 2009 BY Erosion Control Specifications Erosion and Sedimentation Control 101 General The contractor shall be responsible for erosion and sedimentation control within the construction limits, for prevention of sediment laden runoff leaving the construction limits or entering ditches, streams or water impoundments, and for implementation of necessary erosion and sedimentation control measures to meet the requirements of the North Carolina Department of Environment, Health, and Natural Resources The Contractor shall also be responsible for all damages or fines resulting from erosion or sediment laden runoff in the execution of his contract 102 Construction Sequence While the use of erosion and sedimentation control devices is especially important on areas of steep topographv, easily erodible soils and sites in close proximity to water courses throughout the construction period, the control measures should be installed prior to the commencement of land clearing and shall be fully maintained and periodically inspected until final restoration and stabilization is completed Unrestored cleared areas shall be kept to a minimum Disturbed areas ahead of construction shall only be accomplished on those segments for the shortest practical distance as required for continual progress Final restoration shall not be delayed until completion of the project but will be carried out in phases as the work proceeds Under no circumstances will any slopes be left denuded for more than 15 calendar days Under no circumstance will any are be left denuded for more than (21) twenty-one calendar days without some form of stabilization until final restoration is complete 103 Sedimentation Control Measures The following are some of the sediment control devices or measures that may be required to prevent sedimentation of streams, water courses, or drainage structures Earth berms and/or diversion and intercept ditches Sediment traps Filter berms Wire and Gravel Filter inlets Silt fences - not to be placed in streams or ditches perpendicular to flow Check dams gravel filter Gravel construction exit 103 1 Erosion Control Measures Some of the soil erosion control measures which may be required in this contract are Earth slope protection Diagonal water break diversion berms Diversion channels Preservation of existing vegetation Storm inlet protection Stream crossings Energy dissipators Matting of re -seeded areas MAY 1 3 2009 103 2 DetailDrawing Examples of sedimentation and erosion control shown in these plans for installation at locations designated in the plans or as otherwise required by the regulating agency, or the owner as work proceeds 104 Stream Protection Where construction activities are necessary in close proximity to streams, and other waterways, they shall be performed in a manner that does not contribute to degradation of or blockage of the stream -flow In order to prevent possible degradation or blockages, the contractor shall be required to I Keep all construction debris, excavated materials, brush, rocks, refuse and topsoil as far from these waterways as possible Restrict machinery operation or stream crossings in waterways to the extent necessary for construction of utilities crossings 2 If construction work areas are necessary in a waterway, they shall be protected as indicated on the plans 3 If temporary roadways are essential for the construction activities, they shall be constructed of soils which are not highly erodible materials and must not span more than half way across the water course or wetland area at any one time unless otherwise approved by the Engineer These temporary roadways shall be entirely removed as soon as their requirement is met Work in these areas shall follow the requirements of the Corp of Engineers or CAMA permit, or plans as applicable 105 Construction Access The travel of equipment to and from the construction areas shall be minimized not only to protect areas that will not be denuded, but also to prevent the spreading of sediment within and outside of the construction areas Therefore, special construction equipment travel corridors will be established for this use and instructions shall be issued for their use Use of these corridors must be fully enforced Other non -essential traffic will be restricted or discouraged Indiscriminate and convenience traffic shall not be allowed 106 Stockpile/Borrow Areas The Contractor shall be responsible for selecting, obtaining and maintaining stockpile or borrow areas which he may require to complete the contract He is also required to design and incorporate all necessary sediment and erosion controls measures necessary to prevent erosion and contribution of sediment to adjacent areas The Contractor is responsible to obtain all necessary permits or approvals for borrow or spoil areas outside the construction limits 107 Disposal of Excess Water From Excavations The Contractor shall practice management of excess water pumped from excavation to reduce the production and spreading of sediment Pumped water shall be discharged onto stabilized surfaces and allowed to filter through existing vegetation if possible, otherwise, additional control measures may be necessary If ditches are required to remove pumped water from construction excavations, they shall be given the same consideration as any other man- made waterway and they shall be stabilized as to not degrade and produce sediment 108 Excavation and Backfill Excavation shall be closely controlled and all the material removed from the excavation shall be selectively stockpiled in areas where a minimum of sediment will be generated and where other damage will not result from the piled material Drainage ways shall be protected at all times and the placement of ECE1�v MAY 1 3 2009 material in Drainage ways for convenience shall not be allowed Backfi shall be performed in such a manner that remaining trees are not damaga 109 Final Grading and Seeding Finish grading, topsoiling, seeding and/or sodding shall be performed after the construction phase is complete Permanent vegetation of the areas, that have been disturbed, shall be re-established as rapidly as possible If the completion of the construction activities do not coincide with a season in which permanent vegetation can be generated, an interim or temporary program is required This shall include soil conditioners and mulching as necessary for soil stabilization In any case, sediment and erosion controls shall be installed promptly and their maintenance assured 1 10 Approval The approved Erosion Control Plan will be provided by the Owner Any standard conditions relating to soil erosion and sediment control issued to the Contractor as a part of any permits shall be available at the job site at all times I�> CAPE FEAR Engineering, Inc. 151 Poole Rmd Suite 100 B.Mlle NC 2e451 TEL (910) 383 1044 FAX (910)MX 1045 www capefearengmeermg com To NC DWQ Surface Water Protection State Stormwater Section 127 Cardinal Drive Ext Wilmington, NC 28405 -TiFn7 Mary Jean Naugle MAY 1 2 2009 --:r Transmittal Date I May 12, 2009 File 809-02 "36" Subject I Ocean Isle Palms Phase 1A and 1 B SW8 060338 Partial P E Certifications Ponds 12 and 14 ❑ As Requested ® For Your Files ❑ For Distribution ❑ For your Review / Action / Approval ❑ Sent via Mail ❑ Sent via Courier Quantity Drawing No Description 1 copy Partial P E Certification Pond #12 1 copy Partial P E Certification Pond #14 Rmaji- t 1WD42-z ,zoi�r�D to ('61 P Pbi,—z 3, i REMARKS CC File Copy 809-02 "36 Cape Fear Engineering Inc Signed Received By Date Transmittal-MJ-Express 051209 L \Admin\PERMIT Forms\CHECKLISTS & TRANSMITTALS CAPE FEAR 'i Engineering, Inc. 151 Poole Road Suite 100 BeMlle NC 28a51 TEL (B/0)383-1004 FAX (810) 383 10a5 www capefearengrneering corn To INC DWQ Surface Water Protection State Stormwater Section 127 Cardinal Drive Ext Wilmington, NC 28405 Attu Mary Jean Naugle ❑ As Requested ❑ For Your Files ❑ Sent via Mail ❑ Sent via Courier MAY t b 2M Transmittal c--- Date May 7, 2009 File 809-02 "36" Subject "High Density w/Detention Pond" State Stormwater Management Permit Submittal ❑ For Distribution ® For your Review / Action / Approval Quantity Drawing No Description 1 copy Revised calculations for Pond #12, #14 and #21 1 copy NEW supplement & OM for Pond #14 and page 2 and 2A of main application 3 copies Revised sheets SW-1, SW-2, and SW-5 1 copy Revised narrative REMARKS Mary Jean We reviewed impervious allocations for the ponds that we are not proposing to change, 12 and 14, as you requested The total number of lots has been revised to reflect 231 lots plus the 7 lots that we adding for a total of 238 lots Please see revised documents and call me if you have questions CC File Copy 809-02 36" Cape Fear Engineering Inc Signed A& Received By Date Transmittal-MJ-Express 050709 doc L \Admin\PERMIT Forms\CHECKLISTS & TRANSMITTALS