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SW8070303_Current Permit_20220926
ROY COOPER Gave wr EUZABETH S. BISER Secretary BRIAN WRENN Director September 26, 2022 D.R. Horton, Inc. Attn: Bradford Brundage, Vice President 1341 Horton Circle Arlington, TX, 76011 NORTH CAROLINA. Ehv1r0AM0dal Quat€t'y Subject: Permit Renewal Post -Construction Stormwater Management Permit No. SW8 070303 The Overlook at Middle Sound New Hanover County Dear Mr. Brundage: The Division of Energy, Mineral and Land Resources received a complete 8-year Permit Renewal Application for the subject permit on September 201, 2022. The Division is hereby notifying you that permit SW8070303 has been renewed, updated, and re -issued on September 26, 2022 as attached. As requested, a. copy of the current operation and maintenance agreement is also enclosed. This permit shall be effective until March 26, 2029 and does not supersede any other agency permit that may be required. The project shall be subject to the conditions and limitations as specified therein. This permit does not impose new or increased stormwater control requirements; it clarifies the rules and requirements of this program to provide you with a better understanding of your obligations under this permit. Failure to comply with these requirements. will result in future compliance problems. Please note that this permit is not transferable except after notice to and approval by the Division. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing by filing a written petition with the Office of.Administrative Hearings (OAH). The written petition must conform to Chapter 150B of the North Carolina General Statutes and must be filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be final and binding. If you have any questions concerning this permit, please contact .Aisia Freeman in the Wilmington Regional Office, at (910) 796-7318 or .Aisia.freeman@ancdenr.gov Sincerely, -q L , For Brian Wrenn., Director Division of Energy, Mineral and Land Resources Enclosures: Attachment A — Designer's Certification Form Attachment C — Permittingg-�on�Histoorry� Copy of the Renewal AppI'catiocuments Copy of the current operation and maintenance agreement. DE.S/af \`,\Stormwater\Permits & Projects\2007\070303 HD\2022 08 permit 070303 cc: Bradford Brundage; D.R. Horton, Inc.; 131 Racine Dr., Suite 201 Wilmington, NC 28403 Wilmington Regional Office Noah Carolina Department of Environmental. Quality I Divistott of Energy. Mtneatand Land Resources FM �P WUmingtonRegiof al Qf ice 1 127 Cardinal chive ExtWwon I Wilntirigtom North Carolina 28405 910.796.720 Post -Construction Stormwater Management Permit No. SW8 070303 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIViSION OF ENERGY, MINERAL AND LAND RESOURCES POST -CONSTRUCTION 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 DR Horton, Inc. The Overlook at Middle Sound 3210 Middle Sound Loop Road, Wilmington, New Hanover County FOR THE construction, operation and maintenance of two (2) wet detention ponds discharging to Class SA Waters in compliance with the provisions of Session Law 2008-211 and 15A NCAC 2H .1000 (hereafter separately and collectively referred to as the "stormwater rules) as outlined in the application, approved stormwater management plans, supplement, calculations, operation and maintenance agreement, recorded documents, specifications, and other supporting data (the "approved plans and specifications") as attached and/or on file with and approved by the Division of Energy, Mineral and Land Resources (the "Division" or "DEMLR"). The project shall be constructed, operated and maintained in accordance with these approved plans and specifications. The approved plans and specifications are incorporated by reference and are enforceable part of this permit. This permit shall be effective from the date of issuance until March 26t', 2029 and shall be subject to the following specified conditions and limitations. The permit issued shall continue in force and effect until the permittee files a request with the Division for a permit modification, transfer, renewal, or rescission; however, these actions do not stay any condition. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit for cause as allowed by the laws, rules, and regulations contained in Title 15A NCAC 2H.1000 and NCGS 143-215.1 et.al. 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. The subdivision is permitted for 42 lots, each allowed a maximum amount of built -upon area as follows: Lots 1-33 and 36-42 @4,000 square feet; Lot 34 @4116 sf; and Lot 35 @4470 sf. 3. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.8 of this permit. The runoff from all built -upon � area within � the permitted drainage areas of this project must be directed into the permitted stormwater control systems. The wet ponds labeled as Pond 1 and Pond 2 have been designed to treat the runoff from 185,600 and 150,000 square feet of built - upon area, respectively. A. The maximum built -upon area allowed for the entire subdivision is 335,600 square feet Page 'I of 6 Post -Construction Stormwater Management Permit No. SW8 070303 5. The drainage areas will be limited to the amount of built -upon area indicated in Sections 1.3 and 1.8 of this permit, and per approved plans. The built -upon area available for the future development within the drainage areas of Pond 1 and Pond 2 is limited to 8,800 and 6,514 square feet, respectively. 6. A 50-foot-wide vegetative buffer must be provided adjacent all surface waters, measured horizontally from and perpendicular to the normal pool of impounded structures, the top of bank of both sides of streams and rivers and the mean high water line of tidal waters. 7. The volume in excess of the design storm must flow overland through a level spreader and 50 foot vegetative filter strip, designed per NCAC 2H.1008 (f) to pass the peak flow from the 10 year storm in a non -erosive manner. 8. The following design elements have been permitted for the wet detention pond stormwater facilities and must be provided in each respective system at all times. Pond 1 Pond 2 a. Drainage Area, acres. 9.91 7.50 Onsite, ft : 431,700 326,700 Offsite, ft : 0 0 b. Total Impervious Surfaces, ft : 185,600 150,000 Onsite, ft : 176,800 143,486 Future, ft: 8,800 6,514 Offsite, ft: 0 0 c. Design Storm, inches: 3.8 3.8 d. Average Pond Design Depth, feet: 4.0 4.5 e. TSS removal efficiency: 90% 90% f. Permanent Pool Elevation, FMSL: 6.5 7.2 g. Permitted Surface Area QPP, ft: 21,750 23,900 h. Permanent Pool Volume, ft 77,206 96,836 i. Forebay Volume ft : 15 570 19,736 j. Temporary Storage Elevation, FMSL: 8.6 8.8 k. Permitted Temporary Storage Volume, ft : 55,393 45,479 I. Predevelo ment 1 r-24 hr. discharge rate, cfs: 1.83 5.69 m. Controlling Orifice: 3.0"0 pipe 3.0"0 pipe n. Orifice Flowrate, cfs 0.19 0.17 o. Maximum Fountain Horsepower: 1/4 1 1/3 p. Receiving Stream/River Basin: Pages Creek / Cape Fear q. Stream Index Number: 18-87-22 r. Classification of Water Body: SA, HQW Page 2 of 6 Post -Construction Stormwater Management Permit No. SW8 070303 9. The discharge from all wet ponds must be directed to a secondary BMP. The following design elements have been permitted for the required secondary BMP, dry detention basins, and must be provided in the system at all times. Dry Pond 1 1 Dry Pond 2 a. Basin Bottom Elevation FMSL: I A. 0 1 7 n b. Sediment Storage Elevation, FMSL: 7.25 8 c. Storage Elevation, FMSL: 11.0 10.8 d. Sediment Storage Provided, ft: 16,278 12,384 e. Water Volume Provided, ft : 63,270 45,731 f. Controlling Orifice: 2.5" 0 pipe 2.5" 0 pipe II. SCHEDULE OF COMPLIANCE The permittee is responsible for the routine monitoring of the project for compliance with the built -upon area limits, grading and storm drainage system established by this permit, the permit documents, the approved plans and the recorded deed restrictions. 2. The permittee shall review all individual proposed and modified lot plans for compliance with the conditions of this permit. The permittee shall not approve any lot plans where the maximum allowed built - upon area has been exceeded, where the revisions to the grading or to the storm drainage system are proposed, unless and until a permit modification has been approved by the Division. 3. No person or entity, including the permittee, shall alter any component shown in the approved plans and specifications. Prior to the construction of any modification to the approved plans, the permittee shall submit to the Director, and shall have received approval for modified plans, specifications, and calculations including, but not limited to, those listed below. For changes to the project or SCM that impact the certifications, a new or updated certification(s), as applicable, will be required and a copy must be submitted to the appropriate DEQ regional office upon completion of the modification. a. Any modification to the approved plans and specifications, regardless of size including the SCM(s), BUA, details, etc. b. Redesign or addition to the approved amount of BUA or to the drainage area. c. Further development, subdivision, acquisition, lease or sale of any, all or part of the project and/or property area as reported in the approved plans and specifications. d. Altering, modifying, removing, relocating, redirecting, regrading, or resizing of any component of the approved SCM(s), the stormwater collection system and/or vegetative conveyance shown on the approved plan. e. The construction of any allocated future BUA. f. Adding the option to use permeable pavement or #57 stone within the lots as a permeable surface. The request may require a proposed amendment to the deed restrictions and protective covenants for the subdivision to be submitted and recorded. g. The construction of any permeable pavement, #57 stone area, public trails, or landscaping material to be considered a permeable surface that were not included in the approved plans and specifications. h. Other modifications as determined by the Director. 4. The permittee shall notify any lot owner that is found to be in noncompliance with the conditions of this permit, in writing and shall require remediation within a reasonable time frame. 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. Page 3 of 6 Post -Construction Stormwater Management Permit No. SW8 070303 7. All stormwater collection and treatment systems must be located in either public rights -of -way, dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required rights -of -way, common areas and easements, in accordance with the approved plans. 8. During constnucticn, erosion, shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 9. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 10. 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. 11. The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stormwater system function at design condition. The approved Operation and Maintenance Agreement is incorporated by reference into this permit and must be followed in its entirety and maintenance must occur at the scheduled intervals. 12. Records of maintenance activities must be kept by the permittee. The records will indicate the date, activity, name of person performing the work and what actions were taken. 13. The facilities shall be constructed, operated and maintained in accordance with the provisions of this permit, the approved plans and specifications, and the supporting documents attached to this permit and on file with the Division. 14. Decorative spray fountains are allowed in the pond, subject to the following criteria: a. The minimum permanent pool volume is 30,000 cubic feet. b. The fountain must draw its water from less than 2' below the permanent pool surface. C. 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. d. The fountain may not be placed into the forebay. e. The falling water from the fountain must be centered in the main pond, away from the shoreline. f. The maximum horsepower for a fountain in pond 1 is 1/4 horsepower and pond 2 is 1/3 horsepower. 15. The permittee shall amend and record modified deed restrictions to address the changes to the BUA limits for Lot 34 and Lot 35, as per the amendment procedures prescribed in Article 17, Section 17.3 of the previously recorded covenants found in DB 5852 at PG 189, within 60 days of receipt of this permit. The permittee shall submit a copy of the amended and recorded deed restrictions to the Division within 30 days of the date of recording the plat, and prior to selling Lot 34 or Lot 35. The recorded copy must contain all of the statements as set forth in Condition 11.19 of this permit, the proper references, the signature of the Permittee and any affected lot owners, the deed book number and page, and the stamp/signature of the Register of Deeds. Page 4 of 6 Post -Construction Stormwater Management Permit No. SW8 070303 16. The following deed restrictions and protective covenants related to stormwater management have been recorded in Book book # on Pages page #s with the county County Register of Deeds, are incorporated by reference, and must be maintained in perpetuity: a. The following covenants are intended to ensure ongoing compliance with State Stormwater r Cln/S2 7n 2n4 .� h + .1 n I rf u 4 nnn Management Permit ,Jambe � V .., 0, a:� IssueU W .he Division unucr NCJ �� �1 I VVU. 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. e. Alteration of the drainage as shown on the approved plans may not take place without the concurrence of the Division. f. The maximum built -upon area per lot is as follows: Lots 1-33 and 36-42 @4,000 square feet; Lot 34 @4116 sf; Lot 35 @4470 sf. 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 from the built -upon areas on the lot must drain into the permitted system. This may be accomplished through providing roof drain gutters, which drain to the pond or to the street, grading the lot to drain toward the pond or street, or grading perimeter swales and directing them into the pond or street. h. Built -upon area in excess of the permitted amount will require a permit modification. i. All affected lots shall maintain a 50' wide vegetative buffer adjacent to all surface waters, measured horizontally from and perpendicular to the normal pool of impounded structures, the top of bank of both sides of streams and rivers and the mean high water line of tidal waters. j. Any individual or entity found to be in noncompliance with the provisions of the stormwater management permit or the requirements of the Stormwater Rules is subject to enforcement procedures as set forth in G.S. 143, Article 21. III. GENERAL CONDITIONS CORRECTIVE ACTIONS REQUIRED. If the facilities fail to perform satisfactorily, the permittee shall take immediate corrective actions. This includes actions required by this Division and the stormwater rules such as the construction of additional or replacement on -site stormwater systems. These additional or replacement measures shall receive a permit from the Division prior to construction. 2. PERMIT RENEWAL. A permit renewal request must be submitted at least 180 days prior to the expiration date of this permit. The renewal request must include the appropriate application, documentation and the processing fee as outlined in Title 15A NCAC 02H.1045(3). 3. CHANGES TO THE PROJECT NAME, PERMITTEE NAME OR CONTACT INFORMATION. The permittee shall submit a completed Permit Information Update Application Form to the Division within 30 days to making any one of these changes. 4. TRANSFER. This permit is not transferable to any person or entity except after notice to and approval by the Director. Neither the sale of the project and/or property, in whole or in part, nor the conveyance of common area to a third party constitutes an approved transfer of the permit. a. TRANSFER REQUEST. The transfer request must include the appropriate application, documentation and the processing fee as outlined in 15A NCAC 02H.1045(2). This request must be submitted within 90 days of the permit holder meeting one or more of the following: i. A natural person who is deceased; ii. A partnership, limited liability corporation, corporation, or any other business association that has been dissolved; Page 6 of 6 Post -Construction Stormwater Management Permit No. SW8 070303 iii. A person or entity who has been lawfully and finally divested of title to the property on which the permitted activity is occurring or will occur through foreclosure, bankruptcy, or other legal proceeding. iv. A person or entity who has sold the property, in whole or in part, on which the permitted activity is occurring or will occur, except in the case of an individual residential lot sale that is made subject to the recorded deed restrictions and protective covenants; V. -I he assignment of declarant rights to another individual or entity; vi. The sale or conveyance of the common areas to a Homeowner's or Property Owner's Association, subject to the requirements of NCGS 143-214.7(c2); b. TRANSFER INSPECTION. Prior to transfer of the permit, a file review and site inspection will be conducted by Division personnel to ensure the permit conditions have been met and that the project and the on -site stormwater system complies with the permit conditions. Records of maintenance activities performed to date may be requested. Projects not in compliance with the permit will not be transferred until all permit and/or general statute conditions are met. 5. COMPLIANCE. The permittee is responsible for compliance with the terms and conditions of this permit until the Division approves the transfer request. a. APPROVED PLANS AND SPECIFICATIONS. A copy of this permit, approved plans, application, supplement, operation and maintenance agreement, all applicable recorded documents, and specifications shall be maintained on file by the permittee at all times. b. DIVISION ACCESS. The permittee grants Division Staff permission to enter the property during normal business hours to inspect all components of the permitted project. c. ENFORCEMENT. Any individual or entity found to be in noncompliance with the provisions of a stormwater management permit or the requirements of the stormwater rules is subject to enforcement procedures as set forth in NCGS 143 Article 21. d. ANNUAL CERTIFICATION. The permittee shall electronically submit to the Division an annual certification completed by either the permittee or their designee confirming the projects conformance with permit conditions e. OBTAINING COMPLIANCE. 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 modified plans and certification in writing to the Director that the changes have been made. OTHER PERMITS. The issuance of this permit does not preclude the permittee from complying with and obtaining any other permits or approvals that are required for this development to take place, as required by any statutes, rules, regulations, or ordinances, which may be imposed by any other Local, State or Federal government agency having jurisdiction. Any activities undertaken at this site that cause a water quality violation or undertaken prior to receipt of the necessary permits or approvals to do so are considered violations of NCGS 143-215.1, and subject to enforcement procedures pursuant to NCGS 143-215.6. Permit updated, renewed and reissued this the 231 day of September 2022. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Brian Wrenn, Director Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Permit Number SW8 070303 Page 6 of 6 Attachment C - Permitting History The Overlook at Middle Sound Permit No. SW8 070303 Approval 1� Date i Permit Action Veian Description of the Changes Construction, operation and maintenance of five (5) infiltration basins in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the 3/26/2007 Original 1.0 "stormwater rules") and the approved stormwater Approval 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. On December 5, 2012, the Division of Water Quality (DWQ) received a permit Name/Ownership Change Form from Ridge Field Development, LLC. A file review and site inspection was performed on June 30, 12/17/2012 Transfer 1.1 2012 by DWQ and determined that the site is not constructed. The Division is hereby notifying you that permit SW8 070303 has been transferred on December 17, 2012, and shall be effective until March 26, 2021, which includes the extensions The following modifications are included and covered by this permit: 1.Transfers the permit from Gateway Bank & Trust to DR Horton, Inc. 2.Re-designs the road and lot layout. 10/8/2013 Modification 1.2 The stormwater management system has been redesigned to meet the latest set of rules and includes 2 wet detention ponds, 2 dry detention ponds to act as a secondary BMP, and 2 level spreaders and vegetated filter strips to handle the excess flow from the wet detention pond. Page 1 of 2 The following minor modifications are included and covered by this permit: 1.Reallocates a total of 586 sf of the previously permitted 7,100 sf future allocation to Lot 34 and Lot 35 7/22/2019 Minor 1.3 in Drainage Area #2. Lot 34 is now limited to a Modification maximum BUA of 4,116 sf and Lot 35 is now limited to a maximum of 4,470 sf. The future BUA allocation within DA #2 decreases to 6,514 sf. 2.Documents a mailing address change for the permittee. 9/26/2022 Renewal 2.0 Renewal, New expiration date March 26th, 2029 Page 2 of 2 Permit Number. 54 '3?,0333 (to be provided by DWQ) Drainage Area Number. � Dry Extended Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The dry extended detention basin system is defined as the dry detention basin, outlet structure, 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. Important maintenance procedures: The drainage area will be managed to reduce the sediment load to the dry extended detention basin. - Immediately after the dry extended detention basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). No portion of the dry extended detention pond will be fertilized after the first initial fertilization that is required to establish the vegetation. I will maintain the vegetation in and around the basin at a height of approximately six inches. Once a year, a dam safety expert will inspect the embankment. After the dry extended detention basin is established, it will be inspected once a quarter and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BiiilP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/.debris. The Perimeter of the dry Areas of bare soil and/or Regrade the soil if necessary to extended detention I erosive gullies have formed. remove the gully, and then plant a basin ground cover and water until it is established. Provide lime and a one-time fertilizer application. Form SW401-Dry Detention 0&M-Rev.3 EC E IVE JUL 15 2013 Page 1 of 6Y: BMP element: Potentialproblem: How I will remediate the problem. -- The inlet device: pipe or swale The pipe is clogged (if applicable). Unclog; the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated Search for the source of the and reduced the depth to 75% sediment and remedy the problem if of the original design depth possible. Remove the sediment and (see diagram below). dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred or Provide additional erosion riprap is displaced. protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticides are used, wipe them on the plants rather than s ra ' The main treatment area Sediment has accumulated Search for the source of the and reduced the depth to 75% sediment and remedy the problem if of the original design depth possible. Remove the sediment and (see diagram below). dispose of it in a location where it will not cause impacts to streams or the BMP. Revegetate disturbed areas immediately with sod (preferred) or seed protected with securely staked erosion mat. Water is standing more than 5 days after a storm event. Check outlet structure for clogging. If it is a design issue, consult an appropriate professional. Weeds and noxious plants are Remove the plants by hand or by growing in the main wiping them with pesticide (do not treatment area. spray). Form SW401-Dry Detention O&M-Rev.3 JUL 15 2M g�' Page 2 of 4 BMP element. Potentialproblem: How I will remediate the problem: The embankment Shrubs or trees have started Remove shrubs or trees to grow on the embankment. immediately. Grass cover is unhealthy or Restore the health of the grass cover eroding. — consult a professional if necessaEZ. Signs of seepage on the Consult a professional. downstream face. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the basin depth reads 4.75 feet in the main pond, the sediment shall be removed. When the basin depth reads 4.75 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM fll in the blanks) Sediment Removal EN 7.25 J. T po -------------- -- olume Bottom Elevatio 6.0 25% Sediment Storage FOREBAY Form SW401-Dry Detention O&M-Rev.3 Temporary Pool Elevation 11.00 Pool Tempotar -----Sediment Removal Elevation 7.25-----------V01ume Bottom Elevation MAIN POND ffift �CF-IVE JUL 15 2013 BY:—Page 3 0 4 25% Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with 'ihe system or prior to any changes to the system or responsible party. Project name:The Overlook at Middle Sound (Formerly Ridge Field at Middle Sound) BMP drainage area number:I Print name:Brad Brundage Title:City Manager for David Lee, Vice President Address:4073 Belle Terre Blvd, Myrtle Beach, SC 29579 Phone Signat Date: Id- a? 1 / 3 Note: The 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. 14/' bt l� , a Notary Public for the State of C""o//un of Lbrru , do hereby certify that YGL I/nq, rj personally appeared before me this day of 3, and acknowledge the due execution of the forgoing dry detention basin maintenance requirements. Witness my hand and official seal, �.� �• '�riissia;�• F %� PUBLIC = S •.oq.30 2011• a? III 1101" SEAL My commission expires Y► 1ECEIVEft OCT 032013 BY: Form SW401-Dry Detention O&M-Rev.3 Page 4 of 4 Permit Number: 5NA 07J303 (to be provided by DWQ) Drainage Area Number: a Dry Extended Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The dry extended detention basin system is defined as the dry detention basin, outlet structure, 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. Important maintenance procedures: - The drainage area will be managed to reduce the sediment load to the dry extended detention basin. - Immediately after the dry extended detention basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). - No portion of the dry extended detention pond will be fertilized after the first initial fertilization that is required to establish the vegetation. - I will maintain the vegetation in and around the basin at a height of approximately six inches. - Once a year, a dam safety expert will inspect the embankment. After the dry extended detention basin is established, it will be inspected once a quarter and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/ debris is present. Remove the trash/ debris. The perimeter of the dry Areas of bare soil and/or Regrade the soil if necessary to j extended detention I I erosive gullies have formed. remove the gully, and then plant a basin ground cover and water until it is established. Provide lime and a one-time fertilizer application. Form SW401-Dry Detention O&M-Rev.3 -r EIV JUL 15 200 BY: Page _ of 4 BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or swale The pipe is clogged (if applicable). Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated Search for the source of the and reduced the depth to 75% of the original design depth sediment and remedy the problem if possible. Remove the sediment and (see diagram below). dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred or Provide additional erosion riprap is displaced. protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticides are used, wipe them on the plants rather than spraying. The main treatment area Sediment has accumulated Search for the source of the and reduced the depth to 75% of the original design depth (see diagram below). sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Revegetate disturbed areas immediately with sod (preferred) or seed protected with securely staked erosion mat. Water is standing more than 5 days after a storm event. Check outlet structure for clogging. If it is a design issue, consult an appropriate rofessional. Weeds and noxious plants are growing in the main Remove the plants by hand or by wiping them with pesticide (do not treatment area. spray). JUL 15 2013 Form SW401-Dry Detention O&M-Rev.3 BY' Page 2 of 4 BMP element: Potentialproblem: How I will remediate the roblem: The embankment Shrubs or trees have started Remove shrubs or trees to grow on the embankment. u ediztel^. Grass cover is unhealthy or Restore the health of the grass cover eroding. - consult a professional if necessary. Signs of seepage on the Consult a professional. downstream face. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the basin depth reads 2_8 feet in the main pond, the sediment shall be removed. When the basin depth reads 2_8 feet in the forebay, the sediment shall be removed. Sediment Removal Bottom BASIN DIAGRAM ill in the blanks) Temporary Pool Elevation 10.80 .00 Te pora Pool Lemporary-------------- -- olume Sediment Removal Elevation 8.00 1025%-------------------------------------------Sediment Bottom Elevation 7.00 Storage Sto FOREBAY MAIN POND flECEIVE AUG 2 8.2013 BY: Form SW401-Dry Detention O&M-Rev.3 Page 3 of 4 Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the 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. Project name:The Overlook at Middle Sound (Formerly Ridge Field at Middle Sound) BAIP drainage area number:2 Print name:Brad Brundage Title:City Manager for David Lee, Vice President Address:4073 Belle Terre Blvd, Myrtle Beach, SC 29579 Phone:704-804-9781a r, Signature: Date: lG' Note: The 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. a Notary Public for the State of S , Coug of �+rrl� , do hereby certify that briArd ✓riGC personally appeared before me this end ./ day of �( r 3 , and acknowledge the due execution of the forgoing dry detention basin maintenance requirements. Witness my hand and official seal, .�`` � e • W EIS ���i ���` Q • Ril6sip ' • G ��i N 'off °F+•�� 2� OTARy��i m PUBLIC C Ag()\' SEAL My commission expires YI30,A01 OCT 0 3 2013 BY: Form SW401-Dry Detention O&M-Rev.3 Page 4 of 4 Permit Number \,a anu3 (to be provided by DWQ) Drainage Area Number._ Filter Strip, Restored Riparian Buffer and Level Spreader Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BUT. Important maintenance procedures: Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). - Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation - Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. - Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. - Once a year, the soil will be aerated if necessary. - Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate the problem. - The entire filter strip Trash/debris is present. Remove the trash/debris. system The flow splitter device (if applicable) The flow splitter device is cl ed. Unclog the conveyance and dispose of any sediment off -site. The flow splitter device is Make any necessary repairs or damaged. replace if damage is too large for repair. 9 9GFIVE JUL 15 2013 BY: --- Form SWU401-1,evel Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page I of 3 BN F element: Potentialproblem: How I will remediate theproblem: The Swale and the level lip 7-bp- Swale is clogged with sediment. Remove the sediment and dispose of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a berm end of the level spreader that that is higher than the Ievel lip, and shows stormwater has then plant a gerund cover and bypassed it. water until it is established. Provide lime and a one-time fertilizer application. Trees or shrubs have begun Remove them. to grow on the swale or just downslope of the level lip. The bypass channel Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then reestablish proper erosion control. Turf reinforcement is Study the site to see if a larger damaged or ripap is rolling bypass channel is needed (enlarge if downhill. necessary). After this, reestablish the erosion control material. The filter strip Grass is too short or too long Maintain grass at a height of if applicable). approximately three to six inches. Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Sediment is building up on Remove the sediment and the filter strip. restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Plants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water. I The receiving water I Erosion or other signs of Contact the NC Division of Water R damage have occurred at the outlet. Quality local Regional Office, or the 1 401 Oversight Unit at 919-733-1786. ECEIVE _ JUL 1 R 7013 Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M -Rev. �Y. Page 2 of 3 Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the 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. Project name:The Overlook at Middle Sound Formerly Ridge Field at Middle Sound) BMP drainage area number: I Print name:Brad Brundage__ Title:City Manager for David Lee, Vice President Address:4073 Belle Terre Blvd, Myrtle Beach, SC 29579 Date: 16 0 Y 3 Note: The 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. W%s G / (/I' , a Notary Public for the State of S , County of Yr , do hereby certify that ra.d fox personally appeared before me this �� day of Ir' , and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. Witness my hand and official seal, e': Goff 'F.p^.• �,/% ==:a �oTAR), PUBIUG pUTii co-0 \\\ SEAL My commission expires 611 30,?Ory y OCT 032011 Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3 Permit Number: 5\4 0703 j (to be provided by DWo Drainage Area Number:_ Filter Strip, Restored Riparian Buffer and Level Spreader Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: - Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). - Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation - Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. - Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. - Once a year, the soil will be aerated if necessary. - Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire filter strip system Trash/ debris is present. Remove the trash/ debris. The flow splitter device (if applicable) The flow sputter device is clogged. Unclog the conveyance and dispose of any sediment off -site. The flow splitter device is damaged. Make any necessary repairs or replace if damage is too large for repair, i �F-CEIVIE JUL 15 2013 BY: Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page l of ? BMP element: Potentialproblem: How I will remediate theproblem: The swale and the level lip The swale is clogged with sediment. Remove the sediment and dispose of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a berm end of the level spreader that shows stormwater has that is higher than the level lip, and then plant a ground cover and bypassed it. water until it is established. Provide lime and a one-time fertilizer application. Trees or shrubs have begun Remove them. to grow on the swale or just downslo a of the level lip. The bypass channel Areas of bare soil and/or erosive gullies have formed. Regrade the soil if necessary to remove the gully, and then reestablish proper erosion control. Turf reinforcement is damaged or ripap is rolling downhill. Study the site to see if a larger bypass channel is needed (enlarge if necessary). After this, reestablish the erosion control material. The filter strip Grass is too short or too long if applicable). _ Maintain grass at a height of approximately three to six inches. Areas of bare soil and/or erosive gullies have formed. Regrade the soil if necessary to remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Sediment is building up on the filter strip. Remove the sediment and restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Plants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying• problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Nuisance vegetation is choking out desirable species. Remove vegetation by hand if possible. If pesticide is used, do not allow it to get into the receiving water. The receiving water Erosion or other signs of I Contact the NC Division of 'Water � damage have occurred at the outlet. Quality local Regional Office, or the 401 Oversight Unit at 919-733-1786. Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 CE IVIE JUL 15 2013 BY: Page 2 of 3 Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the 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. Project name:The Overlook at Middle Sound (Formerly Ridge Field at Middle Sound) BI P drainage area number:2 Print name:Brad Brundage Title:City Manager for David Lee, Vice President Address:4073 Belle Terre Blvd, Myrtle Beach, SC 29579 Phone: 704-804-9781 Signature: Date: Note: The 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, ,� Nl l'!ih �• wbimabix a. Notary Public for the State of County of rr , do hereby certify that r LI 64 11(/nGaAe.. personally appeared before me this o day of PL for , N13 , and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. Witness my hand and official seal, NNNN , WE /$G X\16i}Oij� :otc + . d r� X40iAR y� PUBOG TNI'C ARp SEAL My commission expires41!130 C �. OCT 0 3 2013 BY: Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3 Permit Number: 070303 (to be provided by DWQ) Drainage Area Number: Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMI'. The 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. Important maintenance procedures: Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). - No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. - Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. - If the basin must be drained for an emergency or to perform maintenance, the flushing of sedhnent through the emergency drain should be minimized to the maximum extent practical. - Once a year, a dam safety expert should inspect the embankment. 4::7C,* 1E1VE s After the wet detention pond is established, it should be inspected once a mo a�JL 15 2013 within 24 hours after every storm event greater than 1.0 inches (or 1.5 inched in a Coastal County). Records of operation and maintenance should be kept in a lap wn set location and must be available upon request. Inspection activities shall be performed as follwws. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet detention basin Areas of bare soil and/or erosive gullies have formed. Regmde the soil if necessary to remove the gully, and then plant a I ground cover and water until it is established. Provide lime and a one-time fertilizer application. FVeetation is too short or too Maintain vegetation at a height of . approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4 Permit Number. (to be provided by DWQ) Drainage Area Number. BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: nerve nr Swale The l}pP is clogged. a Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the Swale if necessary to Swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Seam for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BM?. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on ' the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the lants rather than spraying, The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area, and control the algal growth. pl Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray), the basin surface. JUL 15 2013 Form SW401-Wei Detention Basin O&M-Rev.4 SY' age 2 of 4 Permit Number. (to be provided by DWQ) Drainage Area Number: BMP element: I Potentialproblem: How I will remediate theproblem; The embankment I Shrubs have started to grow on the embankment. Remove shrubs immediately, Evidence of muskrat or Use traps to remove muskrats and beaver activityis present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Ariake all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 5.5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 5.5 feet in the forebay, the sediment shall be removed. BASE4 DIAGRAM ill in the blanks) Sediment Removal ZQQ P -------------- -- Volume Bottom Elevati 0.00 fl Min. Sediment Storage FORE13AY Form SW401-Wet Detention Basin O&M-Rev.4 Permanent Pool Elevation 6.50 Poolw____._..._-__®__________________________ Sediment Removal Elevation 1.00 Volume Bottom Elevation MAIN POND CIEIVE JUL 15 2013 'v: Page-3-of 4 Storage Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the 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. Project name:The Overlook at Middle Sound (Formerly Ridge Field at Middle Sound) BMP drainage area number:) Print name:Brad Brundage Title:City Manager for David Lee, Vice President Address:4073 Belle Terre Blvd, Myrtle Beach, SC 29579 Date: (6-)13 Note: The 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, Sh'itroh 9. ► V aft4abl K , a Notary Public for the State of rr , Co ty of Hb VI' , do hereby certify that arvnpersonally appeared before me this day of ,, and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, \�. W EI G Ai S i PUBLIC 0 GTN C N?.. SEAL My commission expires AD 11 1? 0, C24 .,IF CEIVE BY: Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 Permit Number: 4-% Q 7)-103 (to be provided by DWQ) Drainage Area Number: oZ Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record wiJ be kept fn. a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The 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. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of Form SW401-Wet Detention Basin O&M-Rev.4 n JUL 15 2013 P4,e4 1 of 4 RY: Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: The inlet device: pipe or The pipe is clogged. swale The pipe is cracked or otherwise damaged. Erosion is occurring in the swale. The forebay Sediment has accumulated to a depth greater than the original design depth for sediment storage. The vegetated shelf The main treatment area Erosion has occurred. Weeds are present. Best professional practices show that pruning is needed to maintain optimal plant health. Plants are dead, diseased or dying. Weeds are present. Sediment has accumulated to a depth greater than the original design sediment storage depth. Algal growth covers over 50 % of the area. Cattails; phragmites or other invasive plants cover 50% of the basin surface. Form SW401-Wet Detention Basin O&M-Rev.4 How I will remediate the probl Unclog the pipe. Dispose of the sediment off -site. Replace the pipe. Regrade the swale if necessary to smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. Prune according to best professional practices Determine the source of the problem: soils, hydrology, disease, etc:. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Consult a professional to remove and control the algal growth. Remove the plants by wiping there with pesticide (do not spray). CEIAn-_ JUL 15 20B EBY Page 2 of 4 : Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately, on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove fbeavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 7.20 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 7.20 feet in the forebay, the sediment shall be removed. Sediment Removal Bottom BASIN DIAGRAM (fill in the blanks) 0.00-------- Pe an en -- Volume al -ft Min. - Sediment Storage FOREBAY Form SW401-Wet Detention Basin O&M-Rev.4 Permanent Pool Elevation 7.20 Pool ------Sediment Removal Elevation 0.00 Volume Bottom Elevation f-- MAIN POND E�CE�VE AUG 2 8 ` M3 Page 3 of BV;__----- 1-ft Storage Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the 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. Project name:The Overlook at Middle Sound (Formerly Ridge Field at Middle Sound) BMP drainage area number:2 Print name:Brad Brundage Title:City Manager for David Lee, Vice President Address:4073 Belle Terre Blvd, Myrtle Beach, SC 29579 Signature: Date: /0 P ` t a Note: The 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, Jnaxd r J_ l WWLr W , a Notary Public for the State of of 14n ITLI do hereby certify that personally appeared before me this day of 0(bbW ,�r'� 3 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, \\\`��titiuuuurrr�r��� WE/S �lz` O .• fission•. G�''''% y:gt \AOTAR), PUBLIC 0�rHr CIARC��``�\\ SEAL My commission expires A061 �, ' o 1'4- 11 11 (-_,,F_iVE OCT 0 3 2013 Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 Date Rpceim2d Fee Paid Permit Num q I- o as _ Iyl3ao� sv5 =- �� c77v3 NC DEQ Division of Energy, Mineral and Land Resources STATE STORMWATER: PERMIT RENEWAL APPLICATION FORM In accordance with 15A NCAC 2H.1045(3). the current permit holder shall renew their high density permit 180 days prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781) Section 60. (c). This application form is for permit renewals only. A. PROJECT INFORMATION 1. State Stormwater Permit Number: SW8 070303 2. Project name: The Overlook at Middle Sound 3. Project street address: Overlook Drive City: Wilmington County: New Hanover ZIP: 28411 4. What, if any, changes have been made to the project as permitted? None If the project has changed from the original approved plans, please complete SWU-101 for a Major Modification or Minor Modification Application form available at: https:/ldea-nc.gov/about/divisions/energy- mineral-land-resources/en r - ineral-land-rules/stormw er- ro ram/ ost-construction. B. PERMITTEE INFORMATION If changes to the permittee or project name have been made, please complete either the Permit Update form or the Permit Transfer form available at https://dea.nc.gov/about/divisions/energy-mineral-land- resources/enerav-mineral-land-rules/stormwater-program/post-construction. State Stormwater Permits do not automatically transfer with the sale of the property. 1. Current Permit Holder's Company Name/Organization: D.R. Horton, Inc. 2. Signing Official's Name: Bradford Brundage =%.01=1 M III 3. Signing Official's Title: Vice President SEP 20 M 4. Mailing Address: 1341 Horton Circle BY. City: Arlington State: TX ZIP: 76011 5. Street Address: 131 Racine Dr., Suite 201 City: Wilmington State: NC ZIP: 28403 6. Phone: (704) 804-9781 Email: bcbrundageO-drhorton.com Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018 C. SUBMITTAL REQUIREMENTS Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/0RK9. Only applications packages that include all required items listed below will be accepted and reviewed. initial each item below to indicate that the required information is provided in the application package. BB 1. A permit application processing fee of $505.00 payable to NCDEQ. BB 2. One original signed hard copy and one electronic copy of this completed form. The signing official named on this application to represent the current permittee must meet one of the following: a. Corporation — a principle executive officer of at least the level of vice-president; b. Limited Liability Company (LLC) — a manager or company official as those terms are defined in G.S. 57D "North Carolina Limited Liability Company Act;" c. Public Entity — a principal executive officer, ranking official, or other duly authorized employee; d. Partnership or limited partnership — the general partner; e. Sole proprietor; or f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the signature of another entity. N/A 3. One hard copy and one electronic copy of recorded documents required by the original permit that have not yet been received by DEMLR, including: deed restrictions, protective covenants, condominium/planned community declaration and easements. If the project has been built, include documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If the project has not been built, include a signed agreement that the final recorded deed restrictions and protective covenants will be submitted at a later date. BB 4. O&M Agreements, Please select one: ❑ 1 have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to keep this on file with the permit; or ® 1 do not have a copy of the current recorded O&M Agreement for all SCMs and am requesting a copy be sent to me. I agree to keep this on file with the permit. BB 5. Designer Certifications, Please select one: ® A copy of the certification(s) confirming that the project was built in accordance with the approved plans have been previously provided to the Division; or ❑ A copy of the certification(s) confirming that the project was built in accordance with the approved plans are enclosed; or ❑ The project has not yet been built. N/A 6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a signed, sealed, and dated letter from a licensed professional stating that the SCMs have been inspected, and that they have been built and maintained in accordance with the permit. BB 7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide one hard copy and one electronic copy of documentation from the NC Secretary of State, or other official documentation, which supports the titles and positions held by the persons listed in Section C.2 per 15A NCAC 2H. 1043(3)(b). hops://www.sosnc,gov/online services/search/by title/ Business Registration r_-V9M9 W A SEP 2 0 2022 U Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018 D. PERMITTEE'S CERTIFICATION 1, , the person legally responsible for the permit, certify that I have a copy of the Permit and O&M Agreement on site (or I will obtain a copy and it will be kept on site), that I am responsible for the performance of the maintenance procedures, and the site has been and will be maintained according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs or built -upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my knowledge, correcland complete. Signature: Date: 11qljd NOTARIZATION: 'Ir '� " , a Notary Public for the State of Ogz-f+ t' , County of N C-W d4'1 -I tsU}')P— , do hereby certify that personally appeared before me this the day of 2000-' , and acknowledge the due RY '"' EXpVRES COMMISSIOM�� My instrument. Witness my hand and official seal, SEP 2 0 2022 Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 Permit No. !_ (to be provided by DWQ) 'AMA N CDEWR STORMWATER MANAGEMENT PERMIT APPLICATION FORM .401 CERTIFICATION APPLICATION FORM DRY EXTENDED DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 1/1) must be printed, filled out and submitted along with all the required information. L PROJECT INFORMATION Project name The Overlook at Middle Sound Contact person John D. Richards, PE Phone number 843-839-8424 Date 11/9/2012 (Revised 06/26113) Drainage area number Pond 1- Secondary BMP to Wet Pond #1 R. DESIGN INFORMATION Site Characteristics Drainage area 431,700.00 ftz Impervious area 185,600.00 . ft3 % Impervious 0.43 Design rainfall depth 1.50 in Peak Flow Calculations 1-yr, 24-hr rainfall depth 3.83 in Rational C, pre -development 0.15 (unitless) Rational C, post -development 0.47 (unitless) Rainfall intensity: 1-yr, 24-hr storm 0.16 iNhr Pre -development 1-yr, 24-hr peak flow 1.83 ft3/sec Post -development 1-yr, 24-hr peak flow 0.16 ft3/sec Pre/Post 1-yr, 24-hr peak control -1.67 ft3/sec Storage Volume: Non -SA Waters Minimum required volume ft Provided volume ft3 Sediment storage volume provided ft3 Storage Volume: SA Waters 1.5' runoff volume 23578.00 ft3 Pre -development 1-yr, 24-hr runoff volume 6889.00 ft3 Post -development 1-yr, 24-hr runoff volume 60203.00 ft3 Minimum required volume 53314.00 ft3 Provided volume 63270.00 ft3 OK Sediment storage volume provided 16,278.00 ft3 OK Basin Design Parameters Drawdown time 3.06 days OK SHWT elevation 6.00 fmsl Basin bottom elevation 6.00 fmsl Raise basin bottom, Must be at least 2-ft above SHWT OA Storage elevation 11.00 fmsl �'����� Basin side slopes 3.0 :1 OK Top elevation 12.00 fmsl OK Freeboard provided 1.00 ft OK Basin Bottom Dimensions Basin length 162.00 ft nECEIVE111111hn Basin width 75.00 ft Length to width ratio 2.00 :1 OK JUL 15 �013 6Y: Form SW401-Dry Extended Detention Basin-Rev.3 Parts I. & II. Design Summary, Page 1 of 2 Permit No. (to be provided by DWQ) Additional Information Total runoff volume captured by basin 15.26 ac-in Forebay is required Forebay provided N (Y or N) Is basin in a recorded drainage easement? Y (Y or N) OK Does basin capture all runoff at ultimate build -out? Y (Y or N) OK Is a sediment depth indicator included? Y (Y or N) OK Does the basin include a drain? Y (Y or N) OK GENE JUL 15 2013 BY: Form SW401-Dry Extended Detention Basin-Rev.3 Parts I. & II. Design Summary, Page 2 of 2 Permit No. (to be provided by DWQ) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. •-A C40 4TOk C 3.01 c3.3 CT.11 Plans (1" 50' or larger) of the entire site showing: Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, Maintenance access, Proposed drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. 2. Plan details (1" = 30' or larger) for the bioretention cell showing: Basin dimensions Pretreatment system, Maintenance access, Outlet structure, Overflow device, Flow distribution detail for basin inflow, and - Vegetation specifications. -14C C L 3. Section view of the basin 0" = 20' or larger) showing: Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and Inlet and outlet structures. v • W 6. A construction sequence that shows how the dry detention basin will be protected from sediment until the entire drainage area is stabilized. w"'�'L;O AWAt v 7. The supporting calculations. 57bA%%AWW AWAY O 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. WO �99_ k"RNH? 9. A copy of the deed restrictions (if required). 1r 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. t—EIVE JUL 15 2013 RY: Form SW401-Dry Extended Detention Basin-Rev.3 Part III. Required Items Checklist, Page 1 of 1 NCDENR Permit No. 5% C> (to be provided by DWQ) STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM DRY EXTENDED DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part ill) must be printed, filled out and submitted along with all the required information. yJECTINFORMiUM Project name The Overlook at Middle Sound Contact person John D. Richards, PE Phone number 843-839.8424 Date 11/9/2012 (Revised 08/20/13) Drainage area number Pond 2 - Secondary BMP to Wet Pond #2 Ill. DESIGN INFORMki _ Site Characteristics Drainage area Impervious area % Impervious Design rainfall depth Peak Flow Calculations 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: I-yr, 24-hr storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak control Storage Volume: Non -SA Waters Minimum required volume Provided volume Sediment storage volume provided Storage Volume: SA Waters 1.5" runoff volume Pre -development 1-yr, 24-hr runoff volume Post -development 1-yr, 24-hr runoff volume Minimum required volume Provided volume Sediment storage volume provided Basin Design Parameters Drawdown time SHWT elevation Basin bottom elevation Storage elevation Basin side slopes Top elevation Freeboard provided Basin! Bottom Dimensions Basin length Basin width Length to width ratio 326,700.00 ft 150,000.00 ft2 0.46 1.50 in 3.83 in 0.15 (unitless) 0.49 (unitless) 0.16 in/hr 5.69 ft3/sec 0.64 ft /sec -5.05 ft3/sec ft3 ft3 ft3 18917.00 ft3 5214.00 ft3 48302.00 ft3 43088.00 ft3 45731.00 ft3 OK 12,384.00 ft3 OK 2.56 days OK 5.45 fmsl 7.00 fmsl Raise bayt� 10.80 fmsl 45J-c a�,�„ bm? 3.0 :1 OK r\0(J r 11.80 fmsl OK Co 1.00 ft OK 9 M-113 236.00 ft 1EC IVE 60.00 ft AUt± 103 3.90 :1 OK G BY: Form SW401-Dry Extended Detpntion RRAn-Rev.3 Pat, I. & II. Design Summary, Page 1 of 2 Additional Information Tgtal runoff volume captured by basin Forebay provided Is basin in a recorded drainage easement? Does basin capture all runoff at ultimate build -out? Is a sediment depth indicator included? Does the basil i include a drain? 11.99 ac-in Forebay is required N (Y or N) Y (Y or N) OK Y (Y or N) OK Y (Y or N) OK Y Cr or N) OK Permit No. (to be provided by DWQ) AUGECEIVE 2 8 2013 RV:. Form SW401-Dry Extended Detention Basin-Rev.3 Parts i. & H. Design Summary, Page 2 of 2 Permit No Iil. REQUIRE© ITEMS CHECKLIST (to be provided by D WQ) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial beiow. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. OW 1. Plans (1" 50' or larger) of the entire site showing: Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, Maintenance access, Proposed drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. C3 V_ 2. Plan details (1" = 30' or larger) for the bioretention cell showing: CS Basin dimensions Pretreatment system, Maintenance access, Outlet structure, Overflow device, Flow distribution detail for basin inflow, and Vegetation specifications. TIC ► 1 1 3. Section view of the basin (1" = 20' or larger) showing: Side slopes, 3:1 or lower, Pretreatment and treatment areas, and Inlet and outlet structures. 6. A construction sequence that shows how the dry detention basin will be protected from sediment until the entire drainage area is stabilized. Ankh ON I L4..Ya,(r Amw« 7, The supporting calculations. C.'tQ801\ 0.600R? 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. 9. A copy of the deed restrictions (if required). A17 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. ECIEME JUL 15 2013 RY. Form SW401-Dry Extended Detention Basin-Rev.3 Part III. Required Items Checklist. Page 1 of 1 �5vN o-7o303 1 NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT This form must be completely filled out, printed, initialed, and submitted. i. PROJECT INFORMATION Project name The Overlook at Middle_ Sound Contact name John D. Richards, PE Phone number 843.839-8424 Date Drainage area number January 8,2013 (Revised 06126/13) Pond #1 11. DESIGN INFORMATION The purpose of the LS-VFS Other: Explained below Stormwater enters LS-VFS from A BMP Type of VFS Explanation of any 'Other" responses above K Stormwater Enters the LS-VFS from the Drainage Area Drainage area Impervious surface area Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm Time of concentration Rainfall intensity, 10-yr storm Peak flow from the 10-yr storm Design storm Maximum amount of flow directed to the LS-VFS Is a flow bypass system going to be used? Explanation of any "Other' responses above If Stormwater Enters the LS-VFS from a BMP Type of BMP Peak discharge from the BMP during the design storm Peak discharge from the BMP during the 10-year storm Maximum capacity of a 100-foot long LS-VFS Peak flow directed to the LS-VFS Is a flow bypass system going to be used? Explanation of any 'Other' responses above of ware9 i0r Engineered filter strip (graded & sodded, slope < 8%) SW Coastal Rule for treatment of 'excess' discharge from wet pond #1 in SA Watershed ft Do not complete this section of the form. ft, Do not complete this section of the form. % Do not complete this section of the form. Do not complete this section of the form, cis Do not complete this section of the form. min Do not complete this section of the form. in/hr Do not complete this section of the form. cfs Do not complete this section of the form. Pick one: cfs Do not complete this section of the form. (Y or N) Do not complete this section of the form. Wet detention pond 0 cfs 12.44 Cfs 10 cis 9.66 cis Y (Y or N) design storm discharges to a secondary bmp (dry pond #1) ��� 15 2013 Form SW401 - LS-VFS - Mune2012 - Rev.10 page 1 of 3 LS-VFS Design Forebay surface area Depth of forebay at stormwater entry point Depth of forebay at stormwater exit point Feet of level lip needed per cfs Computed minimum length of the level lip needed Length of level lip provided Width of VFS Elevation at downslope base of level lip Elevation, at the end of the VFS that is farthest from the LS Slope (from level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector swa!e at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below): M B W y (flow depth for 10-year storm) freeboard (during the 10-year storm) Peak velocity in the channel during the 10-yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any "Other" responses above 0 sq ft No forebay is required. in in 10 tvcfs 97 ft 100 it 50 ft 6.10 fmsl 5.70 fms=. 0.80 % N. (Y or N) OK N` (Y or N) Y, (Y or N) Y (Y or N) Please provide plan details of flow splitter & supporting calcs. ft ft ft It it 1.96 fVsec Other: Explained below N (Y or N) NIA (Y or Piped to rip rap outlet protection since topography prohibited use of lined swale W B Fie FIVE JUL 15 2013 RY: Form SW401 - LS-VFS - 29June2012 Rev.10 page 2 of 3 II1. REQUIRED ITEMS CHECKLIST EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Requried Item: 1. Plans (1' - 50' or larger) of the entire site showing: - Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Forebay (if applicable), High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), and Boundaries of drainage easement. 2. Plan details (1' = 30' or larger) for the level spreader showing: - Forebay (if applicable), High flow bypass system, One foot topo lines between the level lip and top of stream bank, Proposed drainage easement, and Design at ultimate build -out. 3. Section view of the level spreader (1' = 20' or larger) showing: - Underdrain system (if applicable), Level lip, Upslope channel, and Downslope filter fabric. 4. Plan details of the flow splitting device and supporting calculations (if applicable). 5. A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. 6. If a non -engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present. 7. The supporting calculations. 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. Page or plan sheet number and any riotes: -cl.!-i5Ci.l 570AM VJA-W pony C3,G3.N AV/T4 37C E IVE JUL 15 2013 BY: Form SW401 - LS-VFS - Mune2012 - Rev.10 Page 3 of 3 'AM NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT This form must be completely filled out, printed, initialed, and submitted. ¢ IECT W-POWATION S\41 07OM3 Of WATF9 1? 0 _m > y o Project name Contact name Phone number Date Drainage area number The Overlook at Middle Sound John D. Richards, PE 843-839-8424 January 8,2013 (Revised 08/20/13) Pond #2 The purpose of the LS-VFS Other: Explained below Stormwater enters LS-VFS from A BMP Type of VFS Engineered filter strip (graded & sodded, slope < 8%) Explanation of any 'Other' responses above SW Coastal Rule for treatment of 'excess' discharge from wet pond #2 in SA watershed If Stormwater Enters the LS-VFS from the Drainage Area Drainage area ft Do not complete this section of the form. Impervious surface area fe Do not complete this section of the form. Percent impervious % Do not complete this section of the form. Rational C coefficient Do not complete this section of the form. Peak flow from the 1 in/hr storm cis Do not complete this section of the form. Time of concentration min Do not complete this section of the form. Rainfall intensity, 1 0-yr storm in/hr Do not complete this section of the form. Peak flow from the 10-yr storm cfs Do not complete this section of the form. Design storm Pick one: Maximum amount of flow directed to the LS-VFS cis Do not complete this section of the form. Is a flow bypass system going to be used? (Y or N) Do not complete this section of the form. Explanation of any "Other' responses above If Stormwater Enters the LS-VFS from a BMP Type of BMP Peak discharge from the BMP during the design storm Peak discharge from the BMP during the 10-year storm Maximum capacity of a 100-foot long LS-VFS Peak flow directed to the LS-VFS Is a flow bypass system going to be used? Explanation of any. "Other' responses above Wet detention pond 0 cis 16.72 cis 10 cis 9.79 cis Y (Y or N) design storm discharges to a secondary bmp (dry pond #2) nIECEIVE P AU61810Xi BY. Form SW401 - LS-VFS - 29J�ne2012 - Rev. page 1 of 3 LS-VFS Design Forebay surface area Depth of forebay at stormwater entry point Depth of forebay at stormwater exit point Feet of level lip needed per cis Computed minimum length of the level lip needed Length of level lip provided Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS Slope (from level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector swale at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below): M W y (flow depth for 10-year storm) freeboard (during the 10-year storm) Peak velocity in the channel during the 10-yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any "Other' responses above 0 sq ft No forebay is required. in in 10 f /cfs 96 ft 100 ft 50 ft 5.60 fmsl 4.60 fmsl 2.00 % N (Y or N) OK N (Y or N) Y (Y or N) Y (Y or N) Please provide plan details of flow splitter & supporting cads. It ft ft ft 2.06 ft/sec Other: Explained below N (Y or N) N/A (Y or N) Piped to rip rap outlet protection since topography prohibited use of lined swale W 1 ' 1 ' 1 , IM nt I 1 I i B i AUG 2 8 200 BY: Form SW401 - LS-VFS - 29June2012 - Rev.10 page 2 of 3 Jill. R1=WRED ITEMS CHECKLIST EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result In a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Requried Item: 1. Plans (V - 50' or larger) of the entire site showing: - Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Forebay (if applicable), High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), and Boundaries of drainage easement. 2. Plan details (V = 30' or larger) for the level spreader showing: - Forebay (if applicable), High flow bypass system, One foot topo lines between the level lip and top of stream bank, Proposed drainage easement, and Design at ultimate build -out. 3. Section view of the level spreader (1" - 20' or larger) showing: - Underdrain system (if applicable), Level lip, Upslope channel, and Downslope filter fabric. 4. Plan details of the flow splitting device and supporting calculations (if applicable). 5. A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. If a non -engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present. 7. The supporting calculations. B. A copy of the signed and notarized operation and maintenance (0&M) agreement. rie Page or plan sheet number and any notes: gG1.I- C-CIS S'r_4W W4f6�t R.C.AGAT CT.W A'"Kvl ECEIVE JUL 15 1013 BY: Form SW401 LS-VFS - 29June2012 - Rev.10 Page 3 of 3 Permit No 5)-g 070M3 (to be provided by DWQ) ATA HCDENR STORM1iUATER MANAGEMENT PERMIT APPLICATION FORM �+ 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part ill) must be printed, filled out and submitted along with all of the required information. 1. PROJECT 11INFORMATION Project name Contact person Phone number Date Drainage area number The Overlook at Middle Sound John H. Richards, PE 843-839-8424 11/9/2012 (Revised 06/26/13) Pond 1 1L DESIGN INFORMATION Site Characteristics Drainage area 431,700 fe Impervious area, post -development 185,600 ft2 % impervious 42.99 % Design rainfall depth 1.5 in Storage Volume: Non -SA Waters Minimum volume required ff3 Volume provided ft3 Storage Volume: SA Waters 1.5" runoff volume 23,578 ft3 Pre -development 1-yr, 24-hr runoff 6,889 ft3 Post -development 1-yr. 24-hr runoff 60,203 ft3 Minimum volume required 53,314 ff3 Volume provided 55,393 ft3 Peak Flow Calculations Is the prelpost control of the 1 yr 24hr storm peak flow required? Y (Y or N) 1-yr, 24-hr rainfall depth 3.8 in Rational C, pre -development 0.15 (unitless) Rational C, post -development 0.47 (unitless) Rainfall intensity: 1-yr, 24-hr storm 0.16 in/hr OK Pre -development 1-yr, 24-hr peak flow 1.83 ft3/sec Post -development 1-yr, 24-hr peak flow 0.16 ft3/sec Pre/Post 1-yr, 24-hr peak flow control -1.67 ft3/sec Elevations Temporary pool elevation 8.60 fmsl Permanent pool elevation 6.50 fmsl SHWT elevation (approx. at the perm. pool elevation) 6.5D fmsl Top of 1 Oft vegetated shelf elevation 7.00 fmsl Bottom of 10ft vegetated shelf elevation 6.00 fmsl Sediment cleanout, top elevation (bottom of pond) 1.00 fmsl Sediment cleanout, bottom elevation 0.00 fmsl Sediment storage provided 1.00 ft Is there additional volume stored above the state -required temp. pool? Y ` (Y or N) Elevation of the top of the additional volume 8.6 fmsl OK JUL 15 2013 BY: Form SW401-Wet Detention Basin-Rev.9.4/18/12 Parts I. & II. Design Summary, Page 1 of 2 Permit No (to be provided by DWG) Ill. DESIGN INFORMATION Surface Areas Area, temporary pooi 29,095 ft' Area REQUIRED, permanent pool 16,405 ff SAIDA ratio 3.80 (unitless) Area PROVIDED, permanent pool, Aperm pool 21,750 If OK Area, bottom of 1 Oft vegetated shelf; Aw_, shell 18,286 ft' Area, sediment cleanout, top elevation (bottom of pond), Ahut..pond 8,973 fe Volumes Volume, temporary pool 55,393 ft OK Volume, permanent pool, Vperm-pool 77,206 f;s Volume, forebay (sum of forebays if more than one forebay) 15,570 fts Forebay % of permanent pool volume 20.2% % OK SAIDA Table Data Design TSS removal 90 % Coastal SAIDA Table Used? Y (Y or N) Mountain/Piedmont SAIDA Table Used? N (Y or N) SAIDA ratio 3.80 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) N (Y or N) Volume, permanent pool, Vpe„o_woi 77,206 ft' Area provided, permanent pool, Aperm. pool 21,750 W Average depth calculated - 3.55 ft OK Average depth used in SAIDA, de (Round to nearest 0.5ft) ft Calculation option 2 used? (See Figure 10-2b) Y (Y or N) Area provided, permanent pool, Ape._p00i 21,750 fe Area, bottom of 1 Oft vegetated shelf. Ah eheN 18,286 W Area, sediment cleanout, top elevation (bottom of pond), Abol-ond 8,973 Y 'Depth' (distance b/w bottom of 1Oft shelf and top of sediment) 5.00 ft Average depth calculated 4.19 ft OK Average depth used in SAIDA, d,,, (Round to down to nearest 0.5h) 4.0 It OK Drawdown Calculations Drawdown through orifice? Y . (Y or N) Diameter of orifice (if circular) 3.00 in Area of orifice (if -non -circular) in Coefficient of discharge (CD) 0.60 (unitless) Driving head (Ho) 0.66 ft Drawdown through weir? N (Y or N) Weir type (unitless) Coefficient of discharge (CW) (unitless) Length of weir (L) ft Driving head (H) ft Pre -development 1-yr, 24-hr peak flow 1.83 fe/sec Post -development 1-yr, 24-hr peak flow 0.16 ft/sec Storage volume discharge rate (through discharge orifice or weir) 0.19 fe/sec Storage volume drawdown time 3.22 days OK, draws down in 2.5 days. Additional Information Vegetated side slopes 3 :1 OK Vegetated shelf slope 10 :1 OK Vegetated shelf width 10.0 ft OK Length of flowpath to width ratio 4 :1 OK C '4.,.,,�• !� WE Length to width ratio 3.5 :1 OK Trash rack for overflow & orifice? Freeboard provided Y (Y or N) TO ft OK OK JUL 151013 Vegetated filter provided? N (Y or N) OK Recorded drainage easement provided? Y (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Drain mechanism for maintenance or emergencies is: Temporary, portable pump Form SW401-Wet Detention Basin-Rev.9-4/18/12 Parts I. & II. Design Summary, Page 2 of 2 Permit (to be provided by DWQ) Ili. REQUIRE© ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result In a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. �.�_ C 1% 4A 1. Plans (1" 50' or larger) of the entire site showing: C;• S - Design at ultimate build -out, Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), - Overflow device, and Boundaries of drainage easement. «• t 2. Partial plan (1 " = 30' or larger) and details for the wet detention basin showing: CT-1 - Outlet structure with trash rack or similar, �3• �� Maintenance access, Permanent pool dimensions, �C �•� Forebay and main pond with hardened emergency spillway, Basin cross-section, Vegetation specification for planting shelf, and Filter strip. Stu. 3. Section view of the wet detention basin (1"= 20' or larger) showing: Side slopes, 3:1 or lower, Pretreatment and treatment areas, and Inlet and outlet structures. C 3 J 0' 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified #jV4WW G on the plans prior to use as a wet detention basin. SO—A_AW5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay, to verify volume provided. . Jf� G�• N 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. X7 7. The supporting calculations. 5'To" a OvA'f 8. A copy of the signed and notarized operation and maintenance (O&M) agreement. #41040 9. A copy of the deed restrictions (if required). 10. A soils report that is based upon an actual field investigation, soil borings; and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.9-4/18/12 �=CE IE ` JUL 15 2013 Part III. RMfed11wm r�� 1-of 1 Permit No. tmj 0 70303 (to be provided by DWQ) �P v �t'at Of� W ATF9 O G 14CDENR y r o -mac STORMVVATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out printed and submitted. The Required Items Checklist (Part Ill) must be printed, filled out and submitted along wiM all of the required information. ,_ lIIIIIQkIECT INFORMATIOlt( Project name The Overlook at Middle Sound Contact person John H. Richards, PE Phone number 843-839.8424 Date 11/9/2012 (Revised 08/20/13) Drainage area number Pond 2 �'3lGk INFORMATION . Site Characteristics Drainage area Impervious area, post -development % impervious Design rainfall depth Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Peak Flow Calculations Is the pre/post control of the 1 yr 24hr storm peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1 -yr, 24-hr storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHWT elevation (approx. at the perm. pool elevation) Top of loft vegetated shelf elevation Bottom of 1 oft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided Is there additional volume stored above the state -required temp. pool? Elevation of the top of the additional volume 326,700 fly 150,000 fe 45.91 % 1.5 in l i 18,917 fe 5,214 fe 48,302 ff 43,088 ff3 45,479 fe Y (Y or N) 3.8 in 0.15 (unitless) 0.49 (unidess) 0.16 inthr OK 5.69 ff /sec 0.64 fe/sec -5.05 f f /sec 8.80 hSI 7.20 fmsl 7.20 fmsl 7.70 fmsl 6.70 fmsl 0.00 fmsl -1.00 fiiul 1.001t IEL EC'eNitE AUG 2- B" 2013 RY: (Y or N) 10.1 fmsl Insufficient Must equal the temp. pool elev. previously entered. Form SW401-Wct Di2mrdiar. Basin-Rev.9-V18112 FLOW i. & ii. Design Summary, rage i of 2 Permit (to be provided by DWQ) Df:SfGw iwFQNATION -- -- '" Surface Areas Area, temporary pool Area REQUIRED, permanent pool SAIDA ratio Area PROVIDED, permanent pool, A,._p., Area, butivrn of Tuft vegetated siieif, AboLsher Area, sediment cleanout, top elevation (bottom of pond), A LP.d Volumes Volume, temporary pool Volume, permanent pool, Vperm,00j Volume, forebay (sum of forebays if more than one forebay) Forebay % of permanent pool volume SAIDA Table Data Design TSS removal Coastal SAIDA Table Used? Mountain/Piedmont SAIDA Table Used? SAIDA ratio Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) Volume, permanent pool, VP,.,., Area provided, permanent pool, Apeimyool Average depth calculated Average depth used in SAIDA, day, (Round to nearest 0.5ft) Calculation option 2 used? (See Figure 10-2b) Area provided, permanent pool, Apen joi Area, bottom of 1 Oft vegetated shelf, An LAdf Area, sediment cleanout, top elevation (bottom of pond), ktlld "Depth" (distance b/w bottom of loft shelf and top of sediment) Average depth calculated Average depth used in SAIDA, d811, (Round to down to nearest 0.5ft) Drawdown Calculations Drawdown through orifice? Diameter of orifice (if circular) Area of orifice (if -non -circular) Coefficient of discharge (Co) Driving head (Ho) Drawdown through weir? Weir type Coefficient of discharge (C„,) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Storage volume discharge rate (through discharge orifice or weir) Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of flowpath to width ratio Length to width ratio Trash rack for overflow A orifice? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all runoff at ultimate build -out? Drain mechanism for maintenance or emergencies is: 31,115 fe 11,696 le 3.58 (unitless) 23,900 fe OK 20,014 6,196 fe 45,479 fe OK 96,836 fe 19,736 fe 20.4% % OK 90 % Y (Y or N) N (Y or N) 3.58 (unitless) N (Y or N) 96,836 ft 23,900 fe 3.74 it OK it Y (Y or N) 23,900 fe 20,014 fe 6,196 fe 6.70 it 4.85 it OK 4.5 it Insufficient. Check calculation. [a(# A3 _(Y or N) 3.00 in _ in' 0.60 (unitless) 0.49 it _(Y or N) _ (unitless) _ (unitless) it it 5.69 fe/sec 0.86 fe/sec 0.17 l /sec 3.01 days OK, draws down in 2-5 days. 3 :1 OK 10 :1 OK 10.it 3 3 :1 OK ���'�� 2.0 :1 OK Y (Y or N) OK AUG 2 8 2M3 1.0 it OK 3 N (Y or N) OK Y (Y or N) OK Y (Y or N) OK Temporary, portable pump Form SW401-Wet Detention Basin-P.ov.e 4!'.&112 Faris i. & H. Design Summary, Page 2 of 2 Permit No. (to be provided by D WQ) gf. REQUIRE© ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. �i •�/ 1. Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out, - Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. TI>wQ tY,N 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: C19,1 I - Outlet structure with trash rack or similar, C� Maintenance access, Permanent pool dimensions, Forebay and main pond with hardened emergency spillway, Basin cross-section, Vegetation specification for planting shelf, and Filter strip. quk » )% 3. Section view of the wet detention basin (1" = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. Lim t IXI 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified pojyO1X & on the plans prior to use as a wet detention basin. +5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay, to verify volume provided. 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. �a�fkiD /l 7. The supporting calculations. pra �/f Wooer !AA "ACA10 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. 11W A011110CW 9. A copy of the deed restrictions (if required). 05M A7_%PJ 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. JUL 15 2013 Form SW401-Wet Detention Basin-Rev.9-4/18/12 Pa Required Items Checklist, ge 1 of 1 High Density Residential Subdivisions Deed Restrictions & Protective Covenances In accordance with Title 15 NCAC 2H.1000 and S.L. 2006-246, the Stormwater Management Regulations, deed restrictions and protective covenants are required for High Density Residential Subdivisions where lots will be subdivided and sold and runoff will be treated in an engineered stormwater control facility. Deed restrictions and protective covenants are necessary to ensure that the development maintains a "built -upon" area consistent with the design criteria used to size the stormwater control facility. I, Brad Brundage , acknowledge, affirm and agree by my signature below, that i will cause the following deed restrictions and covenants to be recorded prior to the sale of any lot: 1. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW8 070303, as issued by the Division of Water Quality under the Stormwater Management Regulations. 2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the stormwater management permit. 3. These covenants are to run with the land and be binding on all persons and parties claiming under them. 4. 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. 5. Alteration of the drainage as shown on the approved plan may not take place without the concurrence of the Division of Water Quality. 6. The maximum built -upon area per lot, in square feet, is as listed below. Lot # BUA Lot # BUA Lot # BUA Lot # BUA 34 4116 35 4470 1-33 4000 36-42 4000 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. A'u• a SO ,,'Zs 7. Each lot will maintain a p** foot wide vegetated buffer between all impervious areas and surface waters. **50 foot for projects located in the 20 coastal counties. 8. All runoff from the built -upon areas on the lot must drain into the permitted system. This may be accomplished through a variety of means including roof drain gutters which drain to the street, grading the lot to drain toward the street, or grading perimeter swa/es to collect the lot runoff and directing them into a component of the stormwater collection system. Lots that will naturally drain into the system are not required to provide these additional measures. .A}rhc1e = 5ech ami I Z, 24 n-eeW_r A 1,7e %fca--J ceoC OnC� a`,, e'? de d. V Da S 85 2 PG 169 Form DRPC-3 Rev.2 05Nov2009 MAY 16 2019 Pagel of 2 BY' High Density Residential Subdivisions Deed Restrictions & Protective Covenances Signature:A(A--. 11* Date: 1, , a Notary Public in the State ofU-jgflh C, County of do he eby certify that Bradford C. Brundage, PE personally appea%ed before me this the dayof 20 and acknowledge ,�, tA xecution of the foregoing instrument. Witness my hand and official seal, SEAL S Hll S SF j, My Commission expires •``AP "'n ''� ° WARdr PUBOP tH' C P0� MAY 16 206 BY: Form DRPC-3 Rev.2 05Nov2009 Page 2 of 2