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HomeMy WebLinkAboutSW8200811_Current Permit_20210720TH CAI ROLlEk A awbumunwaaww July 20, 2021 NC Depatnent of Natural and Cultural Resources Divisian Gf Parks and Recreation Attu: Dwayne Patterson,. Director c/o Jerry Howerton, Chief of Design and Construction n 16151SC Raleigh„ NC 27699 I615 Subject: State Starmwater Management Permit NG. SW8 200811 Hamumcks Beach State Park lid Develop t — Prase Low Dewity Project 0M1uW county Dear Nk. Howerton: The Wilminigton Regional Office received a complete State Stormwater Malt Permit Applicat. for the subject project on July 12, 2021. Staff review of the glans and specifi s. has dined that the Wit, as Pam, cOMPIM with the S MM11ter Rego set forth m 15A NCAC 2H.10W mended on January 1, 2017 (2017 Rules)- we are hereby forwarding wardiiig Permit Na. SWB 200811 dated July 20, 2021, for the construction of` the built -upon area (BUA) and vegetated c o iveyanm associated with the subject Pn*ct. This PmMt Shan be; effective from the daft of issuance until rescinded and the project shall be subject to the conditions and linutatiow as therein and does not . agency lit that may be �d supersede any other required Pads to comply with these requirements will result in future compliance problem. phase note that this perlriit is not tratiid6mble except after notice to and approval by the Division. This cover letter, attachments, and all documents on file with DENIER shall be considered part of this permit and is Herein incorporated by reference. 1f any parts, reqmremients, or limitattow contained in this permit are unacceptable, you have the rigbt to request an adjudicatory hearing by filing a written pedtion with. the Office of Administrative Hearings(OAM. The Witten i conform to Chapter 150E of the North Carolina General StabAn 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) andlor the details ofthe filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via tekphone at 919-431-3000; or visit their website at w- ww.NCOAH.ccm. Unless such demands are made this permit sba11 be final and bmdmg. If you have any questions concerning this permit', please contact Christine Hall in the Wilmington Regional Office, at (910) 796-7215 or cbristim.ball@ncdenr.gov. Sincerely, /� C"-4 "_\ Bruin Wrenn, Director Division of Energy, Mineral and Land Resources Enciosutw: Attachment A — Designer's Certification Form Application Documents DES/rah: %StormwaterTermits 8t Pro}eets\2020120p811 LD\M107 permit 200811 cc: Steven J. lller PE; CLH Design, PA Onslvw County Bw1d ons Onslow Cory Engineering Division of Coastal management W-11m€49ton Regional Office Stormwater File North Carorha Departs o€Enwr nenmental Quality I Division of Energy. ASneral and Land &esources D, EW Y ton Regianel Office I i27 cardinal Drive Extension I Win, North Earvlina 28405 e..m.rar 9=79&XM State Stormwater Management Permit No. SW8 200811 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT LOW DENSITY DEVELOPMENT In compliance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations promulgated and adopted by the North Carolina Environmental Management Commission, including 15A NCAC 02H.1000 amended on January 1, 2017 (2017 Rules) (the "stormwater rules"), PERMISSION IS HEREBY GRANTED TO NC Department of Natural and Cultural Resources, Division of Parks & Recreation Hammocks Beach State Park Mainland Development — Phase 1 1572 Hammocks Beach Road, Swansboro, Onslow County FOR THE construction, management, operation and maintenance of built -upon area (BUA) for a 12% low density project (the "low density area") discharging to Class SA-HQW waters as outlined in the application, approved stormwater management plans, supplements, 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 parts of this permit. This permit shall be effective from the date of issuance until rescinded 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, 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 15A NCAC 2H.1000 and NCGS 143-215.1 et.al. BUA REQUIREMENTS. The maximum amount of BUA allowed for the entire project is 350,000 square feet. The BUA requirements and allocations for this project are as follows: a. LOW DENSITY AREA BUA LIMITS. The low density area must not exceed 12% per the requirements of the stormwater rules. Within this low density area, this permit approves a percent BUA of 4.54% and the construction of a total of 350,000 square feet of BUA, which includes 215,450 square feet of future BUA. b. CAMA AECs. Where a project or lot is located within CAMA's Area of Environmental Concern (AEC), the Division of Coastal Management (DCM) may calculate a different maximum BUA based on CAMA regulations. The more restrictive BUA limit will apply to the project. 2. PERVIOUS AREA IMPROVEMENTS. The following types of improvements are included in the project and considered pervious per the stormwater rules: Page 1 of 5 State Stormwater Management Permit No. SW8 200811 a. PERVIOUS WALKING TRAILS. A 6-foot and 10-foot wide unpaved walking trail located throughout the project has been demonstrated to be a pervious surface. The underlying soil must not be mechanically compacted prior to installation. If, in the future, this walking trail is found to no longer be pervious, a permit modification will be required. 3. LOW DENSITY AREA REQUIREMENTS. The low density area requirements for this project are as follows: a. LOW DENSITY AND CONVEYANCE DESIGN. The low density area is permitted based on the design criteria presented in the sealed, signed and dated supplement and as shown in the approved plans and specifications. This low density area and conveyances must be provided and maintained at the design condition. b. PIPING. Other than the piping shown on the approved plans, only minimal amounts of piping under driveways and roads is allowed within the low density area when it cannot be avoided. No additional piping is allowed. c. DISPERSED FLOW. The low density area has maximized dispersed flow of stormwater runoff through vegetated areas and minimized the channelization of flow. d. VEGETATED CONVEYANCES. Stormwater runoff that could not be released as dispersed flow may be transported by vegetated conveyances with minimum side slopes of 3:1 (H:V) designed to not erode during the peak flow from the 10-year storm event as defined in the stormwater rules and approved by the Division. 4. STORMWATER OUTLETS. The peak flow from the 10-year storm event shall not cause erosion downslope of the discharge point. 5. VEGETATED SETBACKS. A 50-foot wide vegetative setback must be provided and maintained in grass or other vegetation adjacent to all surface waters as shown on the approved plans. The setback is measured horizontally from the normal pool elevation of impounded structures, from the top of bank of each side of streams or rivers, and from the mean high waterline of tidal waters, perpendicular to the shoreline. a. BUA IN THE VEGETATED SETBACK. BUA may not be added to the vegetated setback except as shown on the approved plans. b. RELEASE OF STORMWATER NOT TREATED IN A STORMWATER CONTROL MEASURE (SCM). Stormwater that is not treated in an SCM, such as in the low density area (including roof drains), must be released at the edge of the vegetated setback and allowed to flow through the setback as dispersed flow. 6. RECORDED DOCUMENT REQUIREMENTS. The stormwater rules require the following documents to be recorded with the Office of the Register of Deeds: a. ACCESS AND/OR EASEMENTS. The entire stormwater conveyance system and maintenance accesses must be located in public rights -of -way, dedicated common areas that extend to the nearest public right-of-way, and/or permanent recorded easements that extend to the nearest public right-of-way for the purpose of inspection, operation, maintenance, and repair. b. OPERATION AND MAINTENANCE AGREEMENT. The operation and maintenance agreement must be recorded with the Office of the Register of Deeds. c. FINAL PLATS. The final recorded plats must reference the operation and maintenance agreement and must also show all public rights -of -way, dedicated common areas, and/or permanent drainage easements, in accordance with the approved plans. d. DEEDS. The permittee shall incorporate specific restrictions and conditions into a facility management plan or another legal instrument in lieu of deed restrictions and protective covenants. Page 2 of 5 State Stormwater Management Permit No. SW8 200811 7. CONSTRUCTION. During construction, erosion shall be kept to a minimum and any eroded areas of the on -site stormwater system will be repaired immediately. a. PROJECT CONSTRUTION, OPERATION AND MAINTNEANCE. During construction, all operation and maintenance for the project and stormwater system shall follow the Erosion Control Plan requirements until the Sediment -Erosion Control devices are no longer needed. b. FINAL GRADING. The vegetated areas and vegetated conveyances shall be entirely constructed and vegetated. Once the final grading is completed and the site is stabilized, the permittee shall provide and perform the operation and maintenance as outlined in the applicable section below. 8. MODIFICATIONS. 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 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 BUA, details, etc. b_ Redesign or addition to the approved amount of BUA. 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 stormwater collection system and/or vegetative conveyance shown on the approved plan. e. The construction of any allocated future BUA. f. 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. g. Other modifications as determined by the Director. 9. DESIGNER'S CERTIFICATION. Upon completion of the project, the permittee shall determine if the project is in compliance with the approved plans and take the necessary following actions: a. If the permittee determines that the project is in compliance with the approved plans, then within 45 days of completion, the permittee shall submit to the Division one hard copy and one electronic copy of the following: i. The completed and signed Designer's Certification provided in Attachment A noting any deviations from the approved plans and specifications. Deviations may require approval from the Division; ii. A copy of the recorded operation and maintenance agreement; iii. Unless already provided, a copy of the recorded deed restrictions and protective covenants; and iv. A copy of the recorded plat delineating the public rights -of -way, dedicated common areas and/or permanent recorded easements, when applicable. b. If the permittee determines that the project is not in compliance with the approved plans, the permittee shall submit an application to modify the permit within 30 days of completion of the project or provide a plan of action, with a timeline, to bring the site into compliance. 10. OPERATION AND MAINTENANCE. The permittee shall provide and perform the operation and maintenance necessary, as listed in the signed operation and maintenance agreement, to assure that all components of the permitted on -site stormwater system are maintained at the approved design condition. The approved operation and maintenance agreement must be followed in its entirety and maintenance must occur at the scheduled intervals. a. CORRECTIVE ACTIONS REQUIRED. In the event that the low density area fails to meet the requirements of low density, the permittee shall take immediate corrective actions. This includes actions required by the 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. Page 3 of 5 State Stormwater Management Permit No. SW8 200811 b. MAINTENANCE RECORDS. Records of maintenance activities must be kept and made available upon request to authorized personnel of the Division. The records will indicate the date, activity, name of person performing the work and what actions were taken. 1 1. CURRENT PERMITTEE NAME OR ADDRESS CHANGES. The permittee shall submit a completed Permit Information Update Application Form to the Division within 30 days to making any one or more of the following changes: a. A name change of the current permittee; b. A name change of the project; c. A mailing address change of the permittee. 12. 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) and must be submitted upon occurrence of any one or more of the following events: i. The sale or conveyance of the project and/or property area in whole or in part; ii. Dissolution of the partnership, corporate, or LLC entity, subject to NCGS 55-14-05 or NCGS 57D-6-07 and 08; iii. Bankruptcy; iv. Foreclosure, subject to the requirements of Session Law 2013-121; 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. 13. COMPLIANCE. The permittee is responsible for complying with the terms and conditions of this permit and the approved plans and specifications until the Division approves the transfer request. a. REVIEWING AND MONITORING FOR COMPLIANCE. The permittee is responsible for verifying that the proposed BUA within each drainage area and for the entire project does not exceed the maximum amount allowed by this permit. The permittee shall review and routinely monitor the project to ensure continued compliance with the conditions of the permit. the annroved plans and specifications b. APPROVED PLANS AND SPECIFICATIONS. A copy of this permit, approved plans, application, supplements, operation and maintenance agreement, all applicable recorded documents, and specifications shall be maintained on file by the permittee at all times. c. DIVISION ACCESS. The permittee grants Division Staff permission to enter the property during normal business hours to inspect all components of the permitted project. d. 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. 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. Page 4 of 5 State Stormwater Management Permit No. SW8 200811 OTHER PERMITS. The issuance of this permit does not preclude the permittee from obtaining and complying with any and all other permits or approvals that are required for this development to take place, as required by any statutes, rules, regulations, or ordinances, which are 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 issued this the 20th day of July 2021. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION CL �'q' 0 0 F-11 Brian Wrenn, Director Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Permit Number SW8 200811 Page 5 of 5 State Stormwater Management Permit No. SW8 200811 Attachment A Certification Forms The following blank Designer Certification forms are included and specific for this project: • As -Built Permittee Certification • As -Built Designer's Certification General MDC • As -Built Designer's Certification for Low Density Projects A separate certification is required for each SCM. These blank certification forms may be copied and used, as needed, for each SCM and/or as a partial certification to address a section or phase of the project. Page 1 of 1 State Stormwater Management Permit No. SW8 200811 AS -BUILT PERMITTEE CERTIFICATION I hereby state that I am the current permittee for the project named above, and I certify by my signature below, that the project meets the below listed Final Submittal Requirements found in NCAC 02H.1042(4) and the terms, conditions and provisions listed in the permit documents, plans and specifications on file with or provided to the Division. ❑ Check here if this is a partial certification. Section/phase/SCM #? ❑ Check here if this is part of a Fast Track As -built Package Submittal. Printed Name Signature I, , a Notary Public in the State of County of do hereby certify that personally appeared before me this day of , 20 and acknowledge the due execution of this as -built certification. (SEAL) Witness my hand and official seal My commission expires - compww 1 T Permittee's Ceffiication NCAC .1042(4) N A Provk�, I A, DAD R,E;STR,. C—TtONS 1 BUA RECORp6 �_ �1 1. The deed restrictions and protective covenants have been recorded Y or N and contain the necessary language to ensure that the project is maintained consistent with the stormwater regulations and with the permit conditions. 2. A copy of the recorded deed restrictions and protective covenants Y or N has been provided to the Division. 3. Records which track the BUA on each lot are being kept. (See Note Y or N 1 B, MAINTFNAN+CE ACCESS 1 _ The SCMs are accessible for inspection, maintenance and repair. Y or N 2. The access is a minimum of 10 feet wide. Y or N 3. The access extends to the nearest public right -of_ -way. Y or N � C. EASEMENT'S 1_The SCMs and the components of the runoff collection / conveyance Y N system are located in recorded drainage easements. or 2. A copy of the recorded plat(s) is provided. Y or N 10. ;-TINGLE FAMILY RESIDENTIAL LOTS - Plats for residenbal Inis Thal Y N have an SCM include the following_ Qe 1. The specific location of the SCM on the lot. Y or N 2. A typical detail for the SCM. Y or N 3. A note that the SCM is required to meet stormwater regulations and that the lot owner is subject to enforcement action as set forth in Y N NCGS 143 Article 21 if the SCM is removed, relocated or altered or without prior approval. i E. OPERATION AND II INTENANCE AGREEMENT ; Y .car N 1. The O&M Agreement is referenced on the final recorded plat. Y or N 2. The O&M Agreement is recorded with the Register of Deeds and Y or N appears in the chain of title. r. 1L1rCFCA i ium Amu miffiu v i Ci9Arvtoit rL.^rn — maintenance records are I I being kept in a known set location for each SCM and are available for Y cur review. Division. Page 1 of 7 to State Stormwater Management Permit No. SW8 200811 Note 1- Acceptable records include ARC approvals, as -built surveys, and county tax records. Provide an explanation for every requirement that was not met, and for every "N/A" below. Attach additional sheets as needed. Page 2 of 7 State Stormwater Management Permit No. SW8 200811 AS -BUILT DESIGNER'S CERTIFICATION GENERAL MDC I hereby state that I am a licensed professional and I certify by my signature and seal below, that I have observed the construction of the project named above to the best of my abilities with all due care and diligence, and that the project meets the below listed General MDC found in NCAC 02H.1050 in accordance with the permit documents, plans and specifications on file with or provided to the Division, except as noted on the "AS -BUILT" drawings, such that the intent of the stormwater rules and statutes has been preserved. Check here if this is a partial certification. Section/phase/SCM #? Check here if this is a part of a Fast -Track As -Built Package Submittal per .1044(3). Check here if the designer did not observe the construction, but is certifying the project. Check here if pictures of the SCM are provided. Printed N NC Registration Number SEAL: Signature_ Date Consultant's Mailing Address: City/State/ZIP Phone Number Consultant's Email address: 0) Circle N if the as -built value differs from the Plan. If N is circled, provide an explanation on Page 2. ©N/E = not evaluated (provide explanation on page 2) ©N/A = not applicable to this SCM or project. Consultant's Certification NCAC .1003((3) & General M[x.: �Af-built aN1E UfV/A .1050 ,A. "TREATMENT REQUIREMENTS Y or N 1. The SCM achieves runoff treatment. 2. The SCM achieves runoff volume match. Y or N 3. Runoff from offsite areas and/or existing BUA is Y or N bypassed. 4. Runoff from offsite areas and/or existing BUA is directed Y or N into the permitted SCM and is accounted for at the full build -out potential. 5. The project controls runoff through an offsite permitted Y or N SCM that meets the requirements of the MDC. 6. The net area of new BUA increase for an existing project Y or N has been accounted for at the appropriate design storm level. 7. The SCM(s) meets all the specific minimum design Y or N criteria. 8. VEGETAT ED SETBACK'S # BUA 1. The width of the vegetated setback has been measured Y or N from the normal pool of impounded waters, the MHW line of tidal waters, or the top of bank of each side of rivers or streams. 2. The vegetated setback is maintained in grass or other Y or N vegetation. 3. BUA that meets the requirements of NCGS 143-214.7 Y or N b2 2 is located in the setback. 4. BUA that does not meet the requirements of NCGS 143- Y or N 214.7 (b2)(2) is located within the setback and is limited to: Page 3of7 State Stormwater Management Permit No. SW8 200811 a. Publicly funded linear projects (road, greenway sidewalk) b. Water -dependent structures c. Minimal footprint uses (utility poles, signs, security lighting and appurtenances) 5. Stormwater that is not treated in an SCM is released at Y or N the edge of the setback and allowed to flow through the setback as dispersed flow. DAs-built ON/E ®NIR k Co. ST❑RMWATER ❑ LETS - the outlet handles the peak _ Y or N _ flow from the 10 year storm with no downs erosion. F j D. %rA-RIATnVS 1. A variation (alternative) from the stormwater rule _ Y N provisions has been implemented. or 2. The variation provides equal or better stormwater control Y N and equal or better protection of surface waters. or E. COMPLIANCE WITH OTHER REGULATORY PR_-GRAW Y N has been met. or 1F� SIZING -the volume of the SCM takes the runoff from all surfaces into account and is sufficient to handle the required 1, storm de h. Y or N f`a. C❑ AMINATEO OILS - infitrating SCM's are not _ Y or N I located in or on areas with contaminated soiLs. [ t SIDE SLOPES, 1. Vegetated side slopes are no steeper than 3H:1 V. Y or N 2. Side slopes include retaining walls, gabion walls, or Y or N other surfaces that are steeper than 3H:1 V. 3. Vegetated side slopes are steeper than 3H:1V (provide Y or N supporting documents for soils and vegetation). 1. EROStON PROTECTION 1. The inlets do not cause erosion in the SCM. Y or N 2. The outlet does not cause erosion downslope of the Y or N discharge point during the peak flow from the 10 year storm. J. EXCESS FLOWS -An overflow I bypaw has been I v or 1k - provided. -K.IATERING - A method to drawdown standing water has _ I Y or N I - been provided to facilitate maintenance and inspection. i La ..a EAN❑UT AFTER CONSTRUCTION - the SCM has been Y or N cleaned out and converted to its approved design state. M_ MAINTENANCE ACCESS ; 1. The SCM is accessible for maintenance and repair. Y or N 2. The access does not include lateral or incline slopes Y or N >3:1. N. iGiN K WUALIFICA NS (FAST - - The designer is licensed under Chapters 89A, 89C, 39E, or• Y or N 89F of the General Statutag, Provide an explanation for every MDC that was not met, and for every item marked "N/An or "WE", below_ Attach additional pages as needed: Page 4 of 7 State Stormwater Management Permit No. SW8 200811 AS -BUILT DESIGNER'S CERTIFICATION FOR LOW DENSITY PROJECTS I hereby state that I am a licensed professional and I certify by my signature and seal below, that I have observed the construction of the project named above to the best of my abilities with all due care and diligence, and that the project meets all of the MDC found in 15A NCAC 02H.1003, in accordance with the permit documents, plans and specifications on file with or provided to the Division, except as noted on the "AS -BUILT" drawings, such that the intent of the stormwater rules and the general statutes has been preserved. ❑ Check here if this is a partial certification. Section or phase ❑ Check here if this is part of a Fast -Track As -Built Package Submittal per 15A NCAC 02H .1044(3). ❑ Check here if the Designer did not observe the construction but is certifying the project. ❑ Check here if pictures of the project are provided. Printed Name NC Registration Number. SEAL: Signature Date Consultant's Mailing Address: City: State: Zip: Phone: ( Consultant's Email address: O Circle N if the as -built value differs from the Plan/permit. If N is circled, provide an explanation on page 3. © N/E = Not Evaluated (provide explanation on page 2). GN/A = Not Applicable to this project/plan. Consultant's Certification (MDC 15A NCAC 02H .1003) I ProjolDenWty and Buif�t-Upon Areai �' As -built i O ( MN1A 1. The project has areas of high density based on natural drainage area boundaries, variations in land use or construction phasing. Y or N 2. The project's built -upon area does not exceed the maximum limit specified in the permit. Y or N Illispersed Hare flAs-buiit OWE aDWA 1. The project maximizes dispersed flow through vegetated areas and minimizes channelized flow. Y or N Page 5 of 7 State Stormwater Management Permit No. SW8 200811 Vegetated Conveyances OAs-built � OWE ()NIA 1. Stormwater that is not released as dispersed flow is transported Y N by vegetated conveyances. or 2. The project has a minimal amount of non -vegetated conveyances Y N to reduce erosion. or 3. Other than minimal piping under driveways and roads, no piping Y N has been added beyond what is shown on the approved plans. or 4. Side slopes are no steeper than 3H:1 V. Y or N 5. The conveyance does not erode in response to the peak flow from Y N the 10-year storm. or C—urb outlet systems (ilk appfiCatk) A_ oAs-built ®NEE . ®N/A 1. The swale or vegetated area can carry the peak flow from the Y N 10-year storm at a non -erosive velocity. or 2. The longitudinal slope of the swale or vegetated areas does not Y N exceed 5%. or 3. The swale has a trapezoidal cross-section and a minimum bottom Y N width of two feet. or 4. The minimum length of the swale or vegetated area is 100 feet. Y or N 5. Side slopes are no steeper than 3H:1 V. Y or N 6. The project utilizes treatment swales designed per Section .1061 Y N in lieu of the curb outlet system requirements. or Vegetated Setbacks (if aappliacabte) ;" S-built I ®NUE I GWA 1. The width of the vegetated setback is at least 50'. Y or N 2. The width of the vegetated setback has been measured from the normal pool of impounded waters, the MHW line of tidal waters, Y or N or the top of bank of each side of rivers or streams. 3. The vegetated setback is maintained in grass or other vegetation. Y or N 4. BUA that meets the requirements of NCGS 143-214.7(b2)(2) is Y N located in the setback. or 5. BUA that does NOT meet the requirements of NCGS 143- 214.7(b2)(2) is located within the setback and is limited to: • Publicly -funded linear projects (road, greenway, or sidewalk) Y N • Water dependent structures or • Minimal footprint uses such as poles, signs, utility appurtenances, and security lights. 6. The amount of BUA within the setback is minimized, and Y N channeling of the runoff from the BUA has been avoided. or 7. Stormwater is not discharged (via swale or pipe) through a vegetated setback. Stormwater is released at the edge of the Y or N setback and allowed to flow through the setback as dispersed flow. Page 6 of 7 State Stormwater Management Permit No. SW8 200811 Outlela OAs-built ONIE ®NIA; Y N 1. Stormwater outlets do not cause erosion downslope of the discharge point during the peak flow from the 10-year storm. or (DAs-built r QWE i i [7NIA', 3 1. The project has variations from the MDC that were not previously approved. (Modification may be required.) - - --- Y or N L-1 Deed resvicalons Of applicable) MAs-built ` iDwF- NIA, 1. Deed restrictions are recorded and ensure that the project and the BUA will be maintained in perpetuity consistent with the Y or N permit, approved plans, and specifications. ,(DAs-built QN/E ON/A ` For Subdivisions Only (Residential or Commercial) J, 1. The number of platted lots is consistent with the approved plans. Y or N 2. The project area is consistent with the approved plans. Y or N 3. The layout of the lots and streets is consistent with the approved Y N plan. or 4. The width / radius of streets, paved accesses, cul-de-sacs and Y N sidewalks is consistent with the approved plan. or 5. No piping, other than those minimum amounts needed under a Y N driveway or under a road, has been added. or 6. The lot grading, road grading, vegetated conveyances, piping, Y or N inverts, and elevations are consistent with the approved plans. Provide an explanation below for every MDC that was not met, and for every item marked "NIA" or "N/E." Attach additional pages as needed. Page 7 of 7 Operation & Maintei Hance ►4greges,.:ent Project Name: Hlammocks Beach State Park Mainland Development - Ph1 Project Location: Swansboro, North Carolina Maintenance records shall be kept on the following SCM(s). This maintenance record shall be;kept in a log in a known set location. Any deficient SCM 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 pollutant removal efficiency of the SCM(s). The SCM(s) on this project include (check all that apply & cor Infiltration Basin Quantity: Infiltration Trench Quantity: Bioretention Cell Quantity: Wet Pond Quantity: Stormwater Wetland Quantity: Permeable Pavement Quantity: Sand Filter Quantity: Rainwater Harvesting Quantity: Green Roof Quantity: Level Spreader - Filter Strip Quantity: Proprietary System Quantity: Treatment Swale Quantity: Dry Pond Quantity: Disconnected Impervious Surface Present: User Defined SCM Present: Low Density Present: O&M sheets will I Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Type: I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each SCM above, and attached O&M tables. I agree to notify NCDEQ of any problems with the system or prior to any changes to the system or responsible party. Responsible Party: Title & Organization: Street address: City, state, zip: Phone number(s): Email: Jerry Howerton Chief of Design & Construction, Div. of Parks & Rec., DNCR 121 W. Jones Street Raleigh, NC 27603 919-707-9361 Fier .howerton@nc arks. ov Signatur Date: 11 Ij��."� f ���,.s..�e I, ki fV� �'U—rnb �P' , a Notary Public for the State of County of C , do hereby certify that personally appeared before me this day of o and acknowledge the due execution of th Ope ti n d ntena eemenlU Witness my hand and official seal, Rumble WAKEpUg�.IC CoUtgY, N. y commission expires STORM-Ez Version 1.5 O&M Agreement CEIVE MAY 10 2021 5/5/2 13Y: rage 1 01 1 Important maintenance procedures: The drainage area to the vegetated conveyance or vegetated receiving area will be carefully managed to reduce the sediment load to the vegetated conveyance or vegetated receiving area. After the initial fertilization to establish the grass in the vegetated conveyance or the vegetated receiving area, fertilizer will not be applied to the vegetated receiving areas. The vegetated conveyance or vegetated receiving area will be inspected quarterly. 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. SCM element: Potential problem: How to remediate the problem: Vegetation is too short or Maintain grassed vegetation such that the swale or vegetated Vegetation too long. area does not erode during the peak flow from the 10-year storm Trash/debris is present. Remove the trash/debris. Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then re - Vegetated receiving erosive gullies have sod (or plant with other appropriate species) and water until formed. established. Provide lime and a one-time fertilizer application. areas Trees and/or other woody Remove the trees and woody vegetation from the swale, vegetation are present in regrade the swale if necessary and re-establish grass as shown the swale. on the approved plans. Trash/debris is present. Remove the trash/debris. Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then re - erosive gullies have sod (or plant with other appropriate species) and water until formed. established. Provide lime and a one-time fertilizer application. Sediment covers the grass Remove sediment and dispose in an area that will not impact Vegetated conveyances / at the bottom of the swale. streams or SCMs. Re -sod if necessary. swales / roadside ditches (other than curb The side slope is steeper Regrade the slopes to the permitted configuration per the outlet swales) than the approved pp approved plan and reestablish vegetation. If as -built or existing configuration. conditions do not allow the slopes to be regraded, contact the applicable permitting agency. Determine the source of the problem: soils, hydrology, disease, Grass is dead, diseased etc. Remedy the problem and replace plants. Provide a one - or dying. time fertilizer application to establish the ground cover if necessary. Trees and/or other woody vegetation are present in Remove the trees and woody vegetation from the vegetated the vegetated conveyance, regrade the vegetated conveyance if necessary conveyance. and re-establish grass as shown on the approved plans. Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device (if applicable) The outlet device is damaged Repair or replace the outlet device. Erosion or other signs of damage have occurred at Repair the damage and improve the flow dissipation structure. the outlet. The receiving water Discharges from the site are causing erosion or sedimentation in the Contact the local NCDEQ Regional Office. receiving water. D$IV" LamONLY Date Received Fee Paid Permit Number Applicable Rules: ❑ Coastal SW -1995 Coastal SW - 2008 ❑ Ph H - Post Construction (select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ Mgmt Plan: State of North Carolina Department of Environment and Natural Resources Division of Energy, Mineral and Land Resources STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Hammocks Beach State Park Mainland Develovment - Phase 1 2. Location of Project (street address): 1572 Hammocks Beach Road City:Swansboro County:Onslow Zip:28584 3. Directions to project (from nearest major intersection): The vroiect site is located on FFA Camp Road off Hammock Beech Rd FFA Camp Road is located between 4-H Camp Road and Lydia Dr. 4. Latitude:34° 40' 48" N Longitude:-77° 08' 40" W of the main entrance to the project. II. PERMIT INFORMATION: 1. a. Specify whether project is (check one): ®New ❑Modification ❑ Renewal w/ Modificationt tRenewals with modifications also requires SWU-102 - Renewal Application Form b.If this application is being submitted as the result of a modification to an existing permit, list the existing permit number , its issue date (if known) , and the status of construction: ❑Not Started []Partially Completed* ❑ Completed* *provide a designer's certification 2. Specify the type of project (check one): ®Low Density ❑High Density ❑Drains to an Offsite Stormwater System ❑Other 3. If this application is being submitted as the result of a previously returned application or a letter from DEMLR requesting a state stormwater management permit application, list the stormwater project number, if assigned, and the previous name of the project, if different than currently proposed, 4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ®Sedimentation/Erosion Control:10 ac of Disturbed Area ❑NPDES Industrial Stormwater 0404/401 Permit: Proposed Impacts b.If any of these permits have already been acquired please provide the Project Name, Project/Permit Number, issue date and the type of each permit: 5. Is the project located within 5 miles of a public airport? ®No ❑Yes GEIVI If yes, see S.L. 2012-200, Part VI: http:Llportal.ncdenr.org/web/lr/rules-and-regulations MAY 10 2021 sv: Form SWU-101 Version Oct. 31, 2013 Page 1 of 6 III. CONTACT INFORMATION 1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee, designated government official, individual, etc. who owns the project): Applicant/Organization:Division of Parks & Recreation/NC Deft. of Natural and Cultural Resources Signing Official & Title:Terry Howerton Chief of Design and Construction �(6DtC*�.diaLi a 2 gpn b. Contact information for person listed in item 1a above: D°`' 40r Street Address:121 W. Tones Street City:Raleigh State:NC Zip:27603 Mailing Address (if applicable):1615 MSC City:Raleigh State:NC Zip:27699-1615 Phone: (919 ) 707-9361 Fax: ( ) Email:jerry.howerton@ncparks.gov Please check the appropriate box. The applicant listed above is: ® The property owner (Skip to Contact Information, item 3a) ❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below) ❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and 2b below) ❑ Developer* (Complete Contact Information, item 2a and 2b below.) 2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the person who owns the property that the project is located on): Property Owner/Organization: Signing Official & b. Contact information for person listed in item 2a above: Street Address: City: Mailing Address (if applicable): City: State: Zip: State: Zip: Phone: ( } Fax: Email: 3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other person who can answer questions about the project: Other Contact Person/Organization: Signing Official & b. Contact information for person listed in item 3a above: Mailing Address: City: State: Zip: Phone: ( ) Fax: Email: 4. Local jurisdiction for building permits: Onslow County Point of Contact:Austin Brinkley Phone #: (910 ) 989-3078 Form SWU-101 Version Oct. 31, 2013 Page 2 of 6 IV. PROJECT INFORMATION 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. The project is low density. Stormwater shall be transported grassed channels and only use pipes as culverts Dispersed flow is used where possible and permanent outlet protection has been designed so that the 10-year design storm is non -erosive. 2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved: ❑ Approval of a Site Specific Development Plan or PUD Approval Date: ❑ Valid Building Permit Issued Date: ❑ Other: Date: b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with: ❑ Coastal SW -1995 ❑ Ph II - Post Construction 3. Stormwater runoff from this project drains to the White Oak River basin. 4. Total Property Area:189.37 acres 5. Total Coastal Wetlands Area:12.40 acres 6. Total Surface Water Area: 0 acres 7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project Area+:176.97 acres + Total project area shall be calculated to exclude the followin : the normal pool of impounded structures, the area between the banks of streams and rivers, the area below the Normal High Water (NH1M line or Mean High Water (MHW line, and coastal wetlands landward from the NHW (or MHiN9 line. The resultant project area is used to calculate overall percent built upon area (BLIA). Non -coastal wetlands landward of the NHW (orMHiM line may be included in the total project area. 8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 4.54 % 9. How many drainage areas does the project have?1 (For high density, count 1 for each proposed engineered stormwater BMP. For low density and other projects, use 1 for the whole property area) 10. Complete the following information for each drainage area identified in Project Information item 9. If there are more than four drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. min InformaWn, Vnixtage Area 1 Drainage Draftmw Area Drainajw Area . Receiving Stream Name Intercoastal Stream Class * SA, HQW Stream Index Number * 19-41-(15.5) Total Drainage Area (sf) 7,798,613 M1.03 cc - On -site Drainage Area (sf) 7,708,813 1 I ,R1 Off -site Drainage Area (sf) 89,800 /a Proposed Impervious Area** (s 350,000 % Impervious Area'** total 4.54 hnpeMous�* Surface Area :. Drainage Area 1 Drainage Area Drainage Area _ PFaimge Area On -site Buildings/Lots (sf) 2,800 On -site Streets (sf) 36,990 On -site Parking (sf) 10,110 On -site Sidewalks (sf) 2,480 Other on -site (sf) 0 Future (sf) 215,450 Off -site (sf) 31,810 Existing BUA*** (sf) 50,360 Total (so: 1 350,000 x Stream Class and Index Number can be determined at: httpV&ortal.ncdenr.or ebAvds/csWclassitiications Form SWU-101 Version Oct. 31, 2013 Page 3 of 6 ** Ittt ervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sizeewalks, gravel areas, etc. *** Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that is to be removed and which will be replaced by new B UA. 11. How was the off -site impervious area listed above determined? Provide documentation. The off -site impervious is the asphalt road that is replacing the existing dirt/abandoned asphalt road within the FFA Camp Road right-of-way. Proiects in Union County: Contact DEMLR Central Office staff to check if the project is located within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater requirements as per 1 SA NCAC 02B .0600. V. SUPPLEMENT AND O&M FORMS The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded from httl2://portal.ncdenr.org/web/­­3yg/ws/su/bMp-manual. VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and Land Resources (DEMLR). A complete package includes all of the items listed below. A detailed application instruction sheet and BMP checklists are available from http://12ortal.ncdenr.org/web/wq/ws/su/statesw/forms-docs The complete application package should be submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the interactive online map at http•/ /portal.ncdenr.org/web/wq/ws/su/maps.) Please indicate that the following required information have been provided by initialing in the space provided for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions for each submitted application package from ft://12ortal.ncdenr.org/web/wq/ws/su/statesw/forins docs. Initials 1. Original and one copy of the Stormwater Management Permit Application Form. 5-3 r'1 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants �4 A Form. (if required as per Part VII below) 3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M agreement(s) for each BMP. 4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to http•/ /www.envhelp.org/pages/onestppopress.html for information on the Express program and the associated fees. Contact the appropriate regional office Express Permit Coordinator for additional information and to schedule the required application meeting.) 5. A detailed narrative (one to two pages) describing the stormwater treatment/management 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the 1/2 mile radius on the map. 7. Sealed, signed and dated calculations (one copy). 8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including: a. Development/Project name. b. Engineer and firm. c. Location map with named streets and NCSR numbers. d. Legend. e. North arrow. f. Scale. g. Revision number and dates. h. Identify all surface waters on the plans by delineating the normal pool elevation of impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal waters, and any coastal wetlands landward of the MHW or NHW lines. • Delineate the vegetated buffer landward from the normal pool elevation of impounded structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters. i. Dimensioned property/project boundary with bearings & distances. j. Site Layout with all BUA identified and dimensioned. k. Existing contours, proposed contours, spot elevations, finished floor elevations. 1. Details of roads, drainage features, collection systems, and stormwater control measures. 57 M Sn r-1 for S S'3 r'1 S-3r'1 sIr-1 Form SWU-101 Version Oct. 31, 2013 Page 4 of 6 m. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a qualified person. Provide documentation of qualifications and identify the person who made the determination on the plans. n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations. o. Drainage areas delineated (included in the main set of plans, not as a separate document). p. Vegetated buffers (where required). Copy of any applicable soils report with the associated SHWT elevations (Please identify 5-3 elevations in addition to depths) as well as a map of the boring locations with the existing elevations and boring logs. Include an 8.5"x11" copy of the NRCS County Soils map with the project area clearly delineated. For projects with infiltration BMPs, the report should also include the soil type, expected infiltration rate, and the method of determining the infiltration rate. (Infiltration Devices submitted to WiRO: Schedule a site visit for DEMLR to verify the SHWT prior to submittal, (910) 796-7378.) 10. A copy of the most current property deed. Deed book: 4294 Page No: 277 S -3 " 11. For corporations and limited liability corporations (LLC): Provide documentation from the NC t4%. Secretary of State or other official documentation, which supports the titles and positions held by the persons listed in Contact Information, item 1a, 2a, and/or 3a per 15A NCAC 2H.1003(e). The corporation or LLC must be listed as an active corporation in good standing with the NC Secretary of State, otherwise the application will be returned. h0:/ /www.secretaly.state.nc.us/C2lRorations/CSearch,asRx VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and protective covenants forms can be downloaded from bttj2:liportal.ncdenr.org/web/Ir/state- stormwater-forms does. Download the latest versions for each submittal. In the instances where the applicant is different than the property owner, it is the responsibility of the property owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring that the deed restrictions are recorded. By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and protective covenants for this project, if required, shall include all the items required in the permit and listed on the forms available on the website, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the NC DEMLR, and that they will be recorded prior to the sale of any lot. VIII. CONSULTANT INFORMATION AND AUTHORIZATION Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as addressing requests for additional information). Consulting Engineer:Steven 1. Miller, P.E. Consulting Firm: CLH desim R.a. Mailing Address.400 Regency Forest Dr., Ste.120 CityQu Phone: (919 ) 319-6716 Email:smiller@clhdesignpa.com State:NC Zip:27518 Fax: (919 ) 319-7516 IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this section) I, (print or type name of person listed in Contact Information, item 2a) �-$ naycertify that I own the property identified in this permit application, and thus give permission to (print or type name of person listed in Contact Information, item la) 3:0 with (print or type name of organization listed in Contact Information, item Ia) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal, which indicates the party responsible for the operation and maintenance of the stormwater system. Form SWU-101 Version Oct. 31, 2013 Page 5 of 6 As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their lease agreement, or pending sale, responsibility for compliance with the DEMLR Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DEMLR immediately and submit a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6. Date: ,e -1 J ;1 a 7 J a Notary Public for the State of N • u I I' ` P-,-County of do hereby cer ' that r personally appeared before ,me this day of cknowl^edge theldue execatir of the acation for a stormwater permit. Witness my -hand and official seal, mumble NOTARY PUBLIC WAKE COUNTY, N.C. X. APPLICANT'S CERTIFICATION SEAL -I 61-7V -- My commission expires I, (print or type name of person listed in Contact Information, item 1a) Ten y Howerton certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of the applicable stormwater rules under 15A NCAC 2H .1000 and any other applicable state stormwater requirements. Signature: before me a stormwater permit. Date: %- I, v ,-'- 4 2 J wtJ 1L- , a Notary Public or the State of N- 1 AA� County of do her by certify that personally appeared Of acknowledge thedue of the application for Witness my hand and official seal, Heide Rumble WAKE COUNTY, C• SEAL My commission expires -7V ?D ZJ Form SWU-101 Version Oct. 31, 2013 Page 6 of 6 SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Hammocks Beach State Park - Phase 1 2 Project Area ac 176.97 3 Coastal Wetland Area (ac) _ 12.4 4 Surface Water Area (ac) _ 0 5 Is this project High or Low Density? Low 6 1 Does this project use an off -site SCM? r�No COMPLIANCE 1Af1 M 02H .1003(4) 7 Width of vegetated setbacks provided (feet) 50 8 Will the vegetated setback remain vegetated? _ Yes 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 (c-d)? _ N/A 10 Is streambank stabilization proposed on this project? No MUL4L3ER AND TYPE OF SCMs: 11 Infiltration System 0 12 Bioretention Cell 0 13 Wet Pond 0 14 Stormwater Wetland 0 15 Permeable Pavement 0 16 Sand Filter _ 0 17 Rainwater Harvesting (RWH) _ _ 0 18 Green RoofT- _ 0 r� 19 Level Spreader -Filter Strip (LS-FS) 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 jDryPond 0 23 StormFifter 0 24 Silva Cell 0 25 Bayfilter 0 26 Filterra 0 FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Steve J Miller, PE 28 Organization: CLH design, p_a. 29 Street address: 400 Regency Forest Dr., Ste. 120 30 City, State, Zip: Cary. NC 27518 _ 31 Phone number(s): 919-319-6716 32 Email: _ _ �smiller@cihdesignpa,00m Certification Statement: I certify: under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that the information provided in the form is to the best of my knowledge and belief. true, accurate: and complete; and that the engineering plans. specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here. ECEI - .,er MAY 10 2021 aw 5-6-21 Date DRAINAGE AREAS 1 Is this a high density project? 2 If so, number of drainage areas/SCMs 0 3 Does this project have low density areas? Yes 4 If so, number of low density drainage areas 1 1 Is all/part of this project subject to previous rule 5 versions? i No FORMS LOADED DRAINAGE AREA IWORMATION Entire Sift L,D 1 4 Type of SCM n/a 5 Total drainage area (sq ft _ 8,338,757 _n/a 8,338,757 6 Onsite drainage area (sq ft 8.-248,957 7 Offsite drainage area ft _ 89_,800 _8,248_957 _ 89,800 8 Total BUA in project (sq ft _ 350000 sf sf 9 New BUA on subdivided lots (subject to ermitting) (sq ft _ n/a _ _350000 n/a 10permitting) New BUA not on subdivided lots (subject to sf 318190 sf _ _ 318190 sf 11 Offsite BUA (sq ft 31810 sf 31810 sf 12 Breakdown of new BUA not on subdivided lots: __ - Parking (sq ft + 10110 sf 10110 sf - Sidewalk ft _ 2480 sf _ 2480 sf - Roof ft _ 2800 sf 2800 sf Roadway s ft 38990 sf 36990 sf - Future (sq ft 215450 sf_ 215450 sf - Other, please specify in the comment box below ft sf 13 New infiltrating permeable pavement on subdivided lots (sq ft sf 14 New infiltrating permeable pavement not on Isubdivided lots ft _ sf sf 15permitting) Existing BUA that will remain (not subject to s ft 50360 s_f i. 50360 sf 16 Existing BUA that is already permitted (sq ft) si sf 17 Existing BUA that will be removed (sq ft _ 67000 st 67000 sf 18 Percent BUA 5% 5% 19 Desi n storm inches _ _ n/a _ n/a 20 1 Design volume of SCM cu ft _ ^ n/a n/a 21 lCalculation method for design volume _ n/a _ n as ADDMONAL INFORMATION 22 Please use this space to provide any additional information about the drainage area(s): LOW DENSITY 1 Is project below density thresholds set forth in the applicable stormwater rule? Yes 2 Does project maximize dispersed flow and minimize channelization of flaw? Yes 3 Has the use of piping been minimized per .1003(2)(c)? j Yes 4 Side slopes of the vegetated conveyances (H:V) 3 sf 5 Maximum velocity in the vegetated conveyances during the 10-year storm? 1,41 6 Are curb outlet swales proposed? No 7 Maximum longitudinal slope of curb outlet swale(s) (%) 8 Bottom width of curb outlet swale(s) (feet) ; 9 Maximum side slope of curb outlet swale(s) (H:V) 10 Minimum length of curb outlet swale(s) (feet) _ 11 Are treatment swales used instead of curb outlet swales? 12 Is stormwater released at the edge of the setback as dispersed flow? Yes 13 Have stormwater outlets been designed to prevent downslope erosion? I Yes 14 Are variations to rule .1003 proposed? r No ADMORAL INFORMAT10N 15 Imease use this space to provide any additional information about this low density project: Row 4 - Side slopes are 3H:1 V J S'wrek # Dralnags ' Area r ( BUA Poevious i Q (ac) i 0118) lilope ! V.k,,, I V,, N (tns) i (foe j Raw depth (n) 1 0.04 0.02 0.02 0.63 0.22 2.22 4.50 0.32 0,48 2 3 4 S 6 0.54 1.18 l 0.08 t 0.79 j -- 1.09 j 0.22 0.18 � 003 0.32 0.22 0.32 1.00 t 0.05_ 0.47 0.87 j 0.56 O.Z--t 0.56 0.56 r._ 0.43 2.72 4.25 i 0.41T 3.96 4.23 0.50 ` ; 0.50 0.85 - 0.85 0.85 4.50 0.42 4.50- 0.59 - 4.50 L 0.26 _ 4.50 072 4.50 0.77 147 I 1.55 072 1.35 1.35 7 O.Ga7 0.27 0.40 0,53 3135 2,15 4•.GU 1.04 1-04 0 O.G 0,21 0.27 0.59 2,53 2-15 4,50 0.84 1 ZO 9 O.S7 0,27 0.60 0.50 3.69 3.53 4m, 123 0,97 10 0.50 0.22 O 2© 0.59 2,65 3.03 4.SO I.0a 0.93 11 0.93 0.29 l 0.64 0.50 4.16 0.9s 450 O.Gs 0.GG 12 111-5 0-06 1.110 0w 3.73 2,00 4.50 1.03 1.10 13 0,17 0.01 0.13 O 33 0ZIG 0.50 I 4.5@) O," i 0,60 14 3.15 0.15 3.00 0,33 9.33 060 4.50 � 1,03 174 15 1.55 0.24 131 0.40 6.23 1.20 4EO 1,41 1,07 19 0.1 0.02 0.11 i 0.40 0.S3 1.00 4.50 0.31 0.55 17 19 9 19 20 21 22 PIS 24 25 27