Loading...
HomeMy WebLinkAboutSW8070653_Historical File_20190116 si'arF,,, Q� M Y ra n,, , ROY COOPER ..c _ _ • 26 Governor MICHAEL S.REGAN u0. , es, 00 Secretary Q`"`" ' WILLIAM E.(TOBY)VINSON,JR. NORTH CAROLINA interim Director Environmental Quality January 16,2019 Hoosier Daddy,LLC Lisa C. Beaman,Manager 6025 Tarin Road Wilmington,NC 28409 Subject: State Stormwater Management Permit No. SW8 070653 MOD Oyster Landing Subdivision—Phase 4 Overall Low I ensity Subdivision with a Wet Detention Pond Project Onslow County Dear Ms. Beaman: The Wilmington Regional Office received a modified State Stormwater Management Permit Application for Oyster Landing Subdivision on October 10, 2018 with final additional information received on January 10, 2019. Staff review of the plans and specifications has determined that the project,as proposed,will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000 and Session Law 2008-211. We are forwarding modified Permit No. SW8 070653, dated January 16, 2019, for the construction, operation and maintenance of the BMP's and built-upon area associated with the subject project. This permit shall be effective from the date of issuance until March 2,2024 and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the conditions listed in this permit regarding the Operation and Maintenance of the BMP(s),recordation of deed restrictions, certification of the BMP's,procedures for changing ownership,transferring the permit, and renewing the permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system,to record deed restrictions,to certify the BMP's,to transfer the permit, or to renew the permit,will result in future compliance problems. The following modifications are included and covered by this permit: 1. Utilization of an old borrow pit as a wet detention pond in DA 5 to handle runoff from the proposed development in this phase 4 section. 2. The overall low density status for the common plan of development has been maintained at less than 25%impervious. 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.dh North Carolina Department of Environmental Quality I Division of Energy,Mineral and Land Resources '. >) Wilmington Regional Office 1127 Cardinal Drive Extension I Wilmington.North Carolina 28405 NORT}I CAROLINA DopeMimeor EwleemowlW Owl 910.796.7215 State Stormwater Permit No. SW8 070653 Page 2 of 2 If you have any questions,or need additional information, please contact Steve Pusey in the Wilmington Regional Office, at(910) 796-7215. Sincer y, .Danny Smitt,Interim Director Division of Energy, Mineral and Land Resources GDS/sgp: \\\Stormwater\Permits &Projects12007\070653 HD12019 01 permit 070653 cc: Mark Hargrove,PE—Port City Consulting Engineers,PLLC Onslow County Inspections Onslow County Engineering Division of Coastal Management Wilmington Regional Office Stormwater File State Stormwater Management Systems Permit No. SW8 070653 MOD STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT OVERALL LOW DENSITY SUBDIVISION DEVELOPMENT AND A HIGH DENSITY WET DETENTION POND 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 Hoosier Daddy, LLC Oyster Landing Subdivision S.R. 1518 and NC 172, Folkstone, Onslow County FOR THE construction, operation and maintenance of an overall low density subdivision with one (1) high density wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 and Session Law 2008-211 (hereafter referred to as the "stormwater rules') the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Energy, Mineral and Land Resources (hereafter referred to as the Division or DEMLR) and considered a part of this permit. This permit shall be effective from the date of issuance until March 2, 2024 and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. Each of the lots is limited to a maximum of 4,006 square feet of built-upon area (BUA), as indicated in the approved plans. CAMA regulations may reduce the allowable built- upon area for those lots within the AEC. 2. The overall tract built-upon area percentage for the project may not exceed 25% per the requirements of Section .1005 of the stormwater rules. The maximum amount of built-upon area (BUA) allowed for the entire project is 3,390,536 square feet. 3. Approved plans and specifications for projects covered by this permit are incorporated by reference and are enforceable parts of the permit. 4. For the low density sections, the only runoff conveyance systems allowed will be vegetated conveyances such as swales with minimum side slopes of 3:1 (H:V) as defined in the stormwater rules and approved by the Division. No piping shall be allowed except that minimum amount necessary to direct runoff beneath an impervious surface such as a road and that minimum amount needed under driveways to provide access to lots. 5. The project covered by this permit will provide and maintain a minimum 30 foot wide vegetative buffer between all impervious areas and surface waters. 6. All roof drains must terminate at least 30' from the mean high water mark. Page 1 of 8 State Stormwater Management Systems Permit No. SW8 070653 MOD 7. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.13 of this permit, and per the approved plans and application. 8. The site drains to Stones Creek (SA; HQW), Drainage Area 1, and Turkey Creek (SA; ORW), Drainage Area 2, referred to as the overall drainage areas. This project also has three (3) drainage areas for wet detention ponds DA3, DA4, and DA5. Drainage Basin DA3 area drains to the wet pond for Phase 2. Drainage Basin DA4 area drains to the wet pond for Phase 3. Drainage Basin DA5 area drains to the wet pond for Phase 4. 9. The overall drainage areas DA1 and DA2 have been designed to handle the runoff from a total of 726,165 and 2,664,371 square feet of built-upon area, respectively, including all future BUA, as per the approved plans and application. The impervious BUA for Phases 2, 3, and 4 (in DA3, DA4, and DA5, respectively) is included in the BUA for overall DA2. 10. The runoff from all built-upon area (BUA) within sub-drainage areas 3, 4, and 5 must be directed into the permitted wet detention ponds DA3, DA4, and DA5, respectively. All other runoff shall be directed to flow through vegetated conveyances associated with the low density parts of this project. 11. The "approved stormwater management system" includes the BMP components, the inlet and/or bypass structure, the outlet structure and outlet piping, the runoff collection and conveyance system of catch basins, drop inlets, piping, swales and ditches, pretreatment devices and the vegetated filter (if required). 12. All runoff being directed into wetlands shall flow into and through those wetlands at a non-erosive velocity. 13. The following design criteria have been permitted for the wet detention ponds and it must be provided and maintained at the design condition. DA 3 DA 4 ; DA 5 a. Drainage Area, acres: 11.4 12.86 43.02 Onsite, ft2: 496,427 559,977 1,873,846 Offsite, ft2: 0 0 0 b. Total Impervious Surfaces, ft2: 172,433 220,848 738,088 Onsite, ft2: 165,934 215,003 501,078 Offsite, ft2: 0 0 0 Future, ft2: 6,499 5,845 237,010 c. Average Pond Design Depth, feet: 5.0 4.5 12.0 d. TSS Removal Efficiency: 90% 90% 90% e. Design Storm, inches: 1.5" 1.5" I 1.5" f. Permanent Pool (PP) Elevation, FMSL: 57 50 45.5 g. Permitted PP Surface Area, ft2: 12,938 18,537 429,937 h. Temporary Storage Elevation, FMSL: 58.45 51.35 45.8 i. Permitted Storage Volume, ft3: 22,974 28,964 I 135,716 j. Predevelopment 1 yr-24 hr. discharge rate, cfs: 0.34 0.39 1.3 k. Controlling Orifice, inch 0 pipe: 2.5" 0 pipe I 3.0" 0 pipe 8.0" 0 pipe I. Orifice Flow Rate, cfs: 0.11 0.16 0.53 m. PP Volume, ft3: 42,708 69,678 4,676,402 n. Forebay Volume, ft3: 9,364 14,860 1 42,845 o_ Maximum Fountain Horsepower: 1/6 1/4 3 I p. Receiving Stream/River Basin: Turkey Creek/White Oak q. Stream Index Number: 18-87-1 r. Classification of Water Body: I SA; ORW(not within 1/2 mile) I Page 2 of 8 State Stormwater Management Systems Permit No. SW8 070653 MOD II. SCHEDULE OF COMPLIANCE 1. The facilities shall be constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 2. No component of the approved stormwater management system or the runoff collection and conveyance system, as shown on the approved plans, shall be altered, modified, filled in, piped, redirected or changed in any manner, unless and until the permittee has submitted a revised plan to the Division and received approval. 3 The approved stormwater management system shall be entirely constructed, vegetated and operational for its permitted use prior to the construction of any built- upon surface. 4. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. If the stormwater system is 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. 5. Prior to the sale of any lot, the following deed restrictions must be recorded. a. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW8 070653, as issued by the Division of Energy, Mineral and Land Resources under NCAC 2H.1000. b. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the Stormwater Management Permit. c. These covenants are to run with the land and be binding on all persons and parties claiming under them. d. The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the Division. 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 4,006 square feet. 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 a raised, open deck, the water surface of swimming pools, a surface of #57 stone laid at least 4 inches thick over a geotextile fabric, or a "trail" as defined in GS 113A-85. g. For those lots within the drainage area of the permitted wet detention pond, all runoff from the built-upon areas on the lot must drain into the permitted system. This may be accomplished by a variety of means, including directing roof drain gutters into the BMP or into the street, and/or by grading the lot to drain toward the street or directly into the pond, and/or by grading perimeter swales and directing them into the pond or street. h. For lots within the low density sections, filling in or piping of any vegetative conveyances (ditches, swales, etc.) associated with the development except for average driveway crossings, is strictly prohibited by any persons. Built-upon area in excess of the permitted amount will require a permit modification. j. All lots shall maintain a 30' wide vegetative buffer adjacent to surface waters, measured horizontally from and perpendicular to the normal pool of impounded structures, the top of bank of each side of streams and rivers and the mean high water line of tidal waters. k. Lots within CAMA's Area of Environmental Concern may have the permitted built-upon area reduced due to CAMA jurisdiction within the AEC. Page 3 of 8 State Stormwater Management Systems Permit No. SW8 070653 MOD I. 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 G.S. 143, Article 21. 6. A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of recording the plat, and prior to selling lots. The recorded copy must contain all of the statements above, the signature of the Permittee, the deed book number and page, and the stamp/signature of the Register of Deeds. 7. If permeable pavement BUA credit is desired, the permittee must submit a request to modify this permit to incorporate such language and requirements as deemed necessary by the Division. Otherwise, the individual lot owners must submit an application to the Division to utilize permeable pavement for BUA credit. 8. The permittee shall review all lot plans for new construction and any subsequent modifications and additions, for compliance with the conditions of this permit. The permittee shall not approve any lot plans where the maximum allowed BUA has been exceeded, or where revisions to the grading or to the storm drainage system are proposed unless and until a permit modification has been approved by the Division. 9. The permittee is responsible for the routine monitoring of the project for compliance with the built-upon area limits, grading, and the storm drainage system established by this permit, the permit documents, the approved plans, and the recorded deed restrictions. 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 timely resolution. 10. 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. 11. 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. 12. If the permanent pool volume is greater than 30,000 cubic feet, a decorative spray fountain will be allowed in the stormwater treatment system, subject to the following criteria: a. The fountain must draw its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. c. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for the fountain's pump is based on the permanent pool volume. The maximum pump power for a fountain in pond DA3 is 1/6 HP, a fountain in pond DA4 is 1/4 HP, and a fountain in pond DA5 is 3 hp. 13. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, the permittee shall cause a certification from an appropriate designer for the system installed to be submitted, 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. Page 4 of 8 State Stormwater Management Systems Permit No. SW8 070653 MOD 14. All stormwater collection and treatment systems must be located in either public rights- of-way, dedicated common areas or recorded drainage easements. The final plats for the project will be recorded showing all such rights-of-way, common areas and easements, in accordance with the approved plans. The permittee shall provide access to the stormwater facilities for inspection and maintenance via appropriate recorded easements to the nearest public right-of-way. 15. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built-upon area, details, etc. b. Redesign of the approved amount of built-upon area. c. Expansion or enlargement of the approved drainage area. d. The construction of built-upon area in excess of the maximum approved amount. e. Further development, subdivision, acquisition, lease or sale of any, all or part of the project area listed on the application. f. Altering, modifying, filling in, piping, redirecting or changing in any manner any component of the runoff conveyance system shown on the approved plans. g. The construction of any future BUA listed on the application. 16. Prior to transfer of the permit, the stormwater facilities will be inspected by Division personnel. The project and the stormwater facility must be in substantial compliance with all permit conditions. Any items not in substantial compliance must be repaired, replaced or restored to design condition prior to the transfer. Records of maintenance activities performed to date will be required. 17. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS 1. Any individual or entity found to be in noncompliance with the provisions of a stormwater management permit or the Stormwater rules is subject to enforcement procedures as set forth in NCGS 143 Article 21. 2. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 3. In the event that the facilities fail to perform satisfactorily the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. Additional or replacement stormwater management systems shall receive a permit from the Division prior to construction. 4 The permittee grants DEMLR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. Page 5 of 8 State Stormwater Management Systems Permit No. SW8 070653 MOD 5. This permit is not transferable to any person or entity except after notice to and approval by the Director. The permittee shall submit a completed and signed Name/Ownership Change Form, accompanied by the supporting documentation as listed on the form, to the Division at least 60 days prior to any one or more of the following events: a. An ownership change including the sale or conveyance of the project area in whole or in part, except in the case of an individual lot sale that is made subject to the recorded deed restrictions; b. The sale or conveyance of the common areas to a Homeowner's or Property Owner's Association, subject to the requirements of Session Law 2011-256; c. Bankruptcy; d. Foreclosure; e. Dissolution of the partnership or corporate entity; f. A name change of the current permittee; g_ A name change of the project; h. A mailing address change of the permittee; 6. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 7. The permit issued shall continue in force and effect until modified, revoked, terminated or renewed. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and re-issuance or termination does not stay any permit condition. 8. Approved plans, calculations, supplement forms, operation and maintenance agreements and specifications for this project are incorporated by reference and are enforceable parts of the permit. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 9. Unless specified elsewhere, permanent seeding requirements for the stormwater control measure must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 10. 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 as allowed by the laws, rules and regulations contained in Session Law 2006-246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al. 11 . The permittee shall submit a permit renewal application request 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. Permit modified and reissued this the 16th day of January 2019. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION c:2)SC..sDkt' . >c Dann math, Interim Director Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Permit Number SW8 070653 Page 6 of 8 n m!3 n a' O m o v, = m co ED 2 ``NUuina +°,pryr 3 ri a S a 0 IT PO 3 3 y// § a u.. a emu' N n= v ° IIIIt ! jI :t!i m3 o 0- 0 r..)r 0 47 Z.: , e aw2 jriogrriFi'lc., .0 '* g '''�� PE Q,.e.r• i m c • Cn S 0 = a e ' g R w a , I I lia gig z i 1 I i S , f.-.l 0 : = I l t o 1..... mtlZ ' ml� I (�PO ml0,N m, kmS mlrn m 3 a.'. -.t� - ' �! m .1 mj ( q t...,... 1 ! m CA � , ! • I I 5 r NI a E Z g N Ira 0 I 71 ! I t I C I I ? - o§.0 c R 3 0 cl m o o op < mU acom3 too m3m ° $' N i I I D I GI 17 as 2 a . I m sus m cr Hi a �* a m �p Q r p= J®y = 7 m. m m N . N 6 Qa o _ °. `b 3 � 03 o gac q� fm '�D j Et:m = a a ocu 'l3 a aN m@m m. biza?v pm �0a - ,O m .. o 11_cm 4 !'I -UI '1..e D3 o a sp 0 �ma mfa a , 0.-or c N P. li .< m I I m to 8I I K I M I k I 0 m Q m: v N N�N N N Nvrt N N N N NInk + N W N -+ T' OTo c o O O.... o_igoo0ow < $ o > om_ mmgA < rnEggswaowwYi Vi11aK+ 1 -6 �• m �•5. c1MI— omi mvv5e Na •8mcmSm c a, gXg 3: a °m . 5, 5 n1: 2m a28m oM m m 6011 ° w 05 5 w 3 1. o• g05 m5sm3mo0 _ m3: m c c itM m m a 2-. 2, m m 5W� a c I, o a in 2. a m 9• a m m 5 m n ° m w o�4 m E m a n n w-0 IZID 2 a m 2 ® a m•w r �3 a a g m o a. s °, °, s m m m m m cn g 3 3 3 a o+a, a m * * m Y I!. • z 2 * a a 5 m m, � a 5 s . m m •s &Isla ,2 o 3 m ° a l�f. mIa C a 03 an d c' !0 0 R 12 F O c g g a ° a m 07 0 00 c m 3, 3 n ? 0 c m m 2 ma T 3 g i ii D 1 m ° Q II m Q 5 m m Q a o ° a a a 9' m T�°o m m m a $ =% i -' m a $ a m y Z m o g' o, o, o w m a 77. q m o o O i!. —m25. m m v �m °, M. o G °� 3 c a 3 . 03i DiR a a M 3. s i ' � a � i t II�iI 0 fla i o a o > w c g g to 3 m m o c a I1m _ D. c i • 03 c m ' 3 m m S . m 3 .. a o 5 m O S a o n a 5. .O a m a c a c o a g a C a • °, N, v Il m l l m o. I o m o a s °m m ci Z' a m N m a m m =.1i a II a l m U JJ �- m $ a ° m co a a o oai m .� a m iH ! U Oe Ir_ o p s m •c 5 m m 0l a 1 1 _. m " m N 1 a h d> > 3 a o o '� .mom. m :° -I H 2,, m511 1 m m a m a ° 3� a W m , • m DID w s F i"im o = , a 3 o o a 0 m c o em o c l a y, i a W mlm o = WQ a m o Fr w y • Am 2' 3 ° � m 0 i m !rnI` �,Im ri• a m 3 v r. ° m e W �-• m a w m , IlIl v m i •o m o a 3. 1 2 m m m S H . m a a 1cli m m' 2 0 wa R 1 mil m ii3 0 �(lD� m m 0 m �j a o o- LI wca I2 'm !o w 11 g C m c4 1 :gi:g9 NH r gi1- U y H '. m Ma P m P �p5' 3 i N 1 ag •18 o m o 9' E i a i c % g %p I ,s w n9 ii 1 p w N m S a VII 5" m A 3 6 Of 3 i i _8 < _o 0 2 m 1 -C N : w o Z 'w t I g a < < Z A Z �.�' o w a 0 ° u c '" 9 ° n�i D "' m ° ° m N E 5, $ m, „ N 1 1:114 00 V V V 0� �I , O > W N O m w - o v o _v m m m r - o o -+6` A p w v m I a v w °m d m a c < ° w w °m a m p o c pp °m $ fi m • m m -• m a ca w o, 3 m 0; m a 22 5 5' m w w y C m 3 a C m ° p 3.e C P r a N w a 2 $ oo 1 5: 3 5 m fluii UL w •cnt; uuiIUUii ; r y > m mo. :,• no 5 �a mD3 �+ am v D °1 > I. a, .7 ° • ° 3 - - m m = 8. m ° o a c7 Z as la0. 5 m m' m s w a 1 >I _ 0 l' -8 a m F in a 3 _ v ' 3mm c m5' S IVP 'a3. va a mrr = 3s . 8aQ I A mQ 3, c ° ma . ," 10 1' g c 3 m i 4 a m ed o a m m am m a a m ig s -o m f z c g I a W - 0 m .- i m 5 g• c I o a W m 3 v c R. o c a G) m 55 4 m o n c �• m a o 5. a a s m m 0 m [ 2 a 2 m a h m^ ° fo' c ° m m m a I ° m e it E ° a m E i m 8 .? mF i o _p 5 v. 2- 0 w N I s. 3 a 3 3 - a !I r m o ll 1 �� il m3. a � a � o5 � 65% : I �� 7'17 dl a w 3 a a 5 �. m _� y 1 cap' y � ro rp L_ . •� a: 1- J ? V III .... l a A y V g ' d ° i i I 1.1 > t13 3i ; 1 0 SEIM j ' I a h I g J el ° 1 —± 1 5 V Q d = m� - -i ami O tli el = ' CO N N m 0,1 1-•< H m w W of d „, al G c, O GWA N C S 1 3 m a 3 I ca w 61 118 g 91 18 o 8m `8 1 n M i aI II I I m°• I I I P A93. 2, i s'a, 5iI _iJ a1 "J m I cn N N D K 1-+ N n N O OYSTER LANDING PHASE RI STORM WATER CALCULATIONS FOR NCDEQ SEPTEMBER, 2C18 REVISED 1116/19 d. „,, . Fr,..,:. 0 „SSio 7.,A '" QC) /1.P. 7 ':-:- -,i' ri. SEAL r E' 14 19742 Er". = c?-17 ``)/cimee e '•:,aPt ' op 0 iliglitoke pECEIVE-r. JAN 1 i 20)3 b BY' Port City Consulting Engineers, PL LC 6216 Stonebridge Road Wilmington, North Carolina 28409 (910) 599-1744 License# P-1 032 STORM WATFR NARRATIVE OYSTER LANDING PHASE IV SNEADS _ CRY, Nr SEPTEMBER, 2018 Revised January 16, 2019 The site is located on NC 172 approximately 1.5 miles east of US HWY 17. This project was previously permitted as a low density project on October 2, 2007 (SW8 070653) and a modification was approved on March 2, 2016 for Phase II and on March 13, 2017 for Phase III that used wet ponds to treat the runoff from the piped systems. The original project was designed as a low density subdivision with roadside swales. Phases II & Ill had curb & gutter and thus a wet pond to treat the storm water runoff. The roads for Phase IV will also have curb and gutter and storm water will be conveyed to a wet detention basin by culverts. The project will remain a "Low Density" project and the allowable BUA per lot will remain at 4,006 sf. The wet pond is an old borrow pit that will be converted to a wet detention pond. The converted borrow pit will be much larger than is required per the storm water regulations. The pond will be about 30 times larger than required. The pond will have a 6 ft wide vegetative shelf around 73% of the pond. The remaining edge of the pond will be used for a "beach" where the side slopes are 10:1 to allow for kids to play and be able to wade in the water without the fear of stepping off onto a steep side slope. The site drains to Stones Creek (SA; HQW) and Turkey Creek (SA; ORW). The project for this submittal will have five (5) drainage basins. The first two are the two areas that drain to Stones Creek (Drainage Area No. 1) and Turkey Creek (Drainage Area No. 2). Drainage Basin No. 3 is the area that drains to the wet pond for Phase II. Drainage Basin No. 4 is the area that drains to the wet pond for Phase III. Drainage Basin No. 5 is the area that drains to the wet pond for Phase IV. The impervious area shown for Phases II & III is also included in the impervious area for Drainage Area No. 2. The impervious area for Ph IV is included in Drainage Areas No. 1 & No. 2. The impervious area proposed for the next phase of construction is shown in both Drainage Area No. 5, However, The pond for Phase IV of the project is located outside the / mile line of Turkey Creek and is located in Drainage Area No. 5. The subdivision is 319 acres and the allowable impervious area remains at 24.4% which equates to 3,390,536 sf of impervious area. Paved Areas = 384,990 sf Lot BUA = 985,476 sf Future Impervious Area — 2,020,070 sf 3,390,536 sf — 77.84 ac 77.84/319 = 24.4% The site meets the low density criteria for subdivisions. DEMLR USE ONLY Date Recei,ved Fee Paid Permit Number Id yi i(11(9 .. '5050o Sw8' o7O653 Applicable Rules: 0 Coastal SW-1995 0 Coastal SW-2008 0 Ph U-Post Construction (select all that apply) 0 Non-Coastal SW-HQW/ORW Waters 0 Universal Stonuwater Management Plan ❑Other WQ Mgmt Plan: Q 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.): Oyster Landing Subdivision 2. Location of Project(street address): NC172&SR1518 City:Sneads Ferry County:Onslow Zip: 28460 3. Directions to project(from nearest major intersection): US HWY 17&NC 172,turn right on NC 172 and go 1.35 miles. Turn right onto Oyster Landing Drive 4. Latitude:34°32'19"N Longitude:77°28'39"W of the main entrance to the project. IL PERMIT INFORMATION: 1.a.Specify whether project is(check one): ONew 11 Modification 0 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 SW8 070653 Mod ,its issue date(if known)March 13,2017 ,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 :Nigh Density ❑Drains to an Offsite Stormwater Sysleut ❑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: 55 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: 1I� I a 5. Is the project located within 5 miles of a public airport? ®No ['Yes If yes,see S.L.2012-200,Part VI:http://portal.ncdenr.org/web/h/rules-and-regulations OCT 1 0 2018 BY: • Form SWU-101 Version Oct.31,2013 Page 1 of 6 4 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:Hoosier Daddy,LLC Signing Official&Title:Lisa Beaman-Member Hoosier Daddy,LLC b.Contact information for person listed in item la above: Street Address:6025 Tarin Road City:Wilmington State:NC Zip:28409 Mailing Address(if applicable): City: State: Zip: Phone: (910 ) 769-3053 Fax: ( ) Email: e85lisa@gmail.com c.Please check the appropriate box.The applicant listed above is: I ►Z/ 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&Title: b.Contact information for person listed in item 2a above: Street Address: City: State: Zip: Mailing Address(if applicable): City: State: Zip: Phone: ( ) Fax: ( ) Email: 3.a. (Optional)Print the name and title of another contact such as the project's constructs , raTiE person who can answer questions about the project: I Other Contact Person/Organization:lack Carlisle 2018 OCT' 1 0 Signing Official&Title:Member Hoosier Daddy,LLC b.Contact information for person listed in item 3a above: ICY: Mailing Address:6025 Tarin Raod City:Wilmington State:NC Zip:28409 Phone: (910 ) 818-7078 Fax: ( Email:e85jack@gmail.com 4. Local jurisdiction for building permits: Onslow County Point of Contact George Lacey Phone#: f910 ) 989-3072 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. Stormwater for Phase IV that drains into the road will be treated in a wet detention pond sized to handle 90% TSS 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: o Z r f'::",. -„, illOther: Date: r Z019 b.If claiming vested rights,identify the regulations)the project has been designed in a rd ncPwltfl iii ❑Coastal SW-1995 ❑Ph II-Post Construction Bv� 3. Stormwater runoff from this project drains to the White Oak River basin. 4. Total Property Area:319 acres 5. Total Coastal Wetlands Area: acres 6. Total Surface Water Area: acres 7. Total Property Area(4)-Total Coastal Wetlands Area(5) -Total Surface Water Area (6) =Total Project Area+:319 acres + Total project area shall be calculated to exclude the following: the normal pool of impounded structures, the area between the banks of streams and rivers, the area below the Normal High Water(NHVV)line or Mean High Water (MHVV)line, and coastal wetlands landward from the NHW(or MHVV) line. The resultant project area is used to calculate overall percent built upon area(BUA). Non-coastal wetlands landward of the NHW(or MHN)line may be included in the total project area. 8. Project percent of impervious area: (Total Impervious Area/Total Project Area)X 100 =24.4 % 9. How many drainage areas does the project have?4 (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. Phase II Pond's Phase III Pond "SKb Basin Information Drainage Area 1 Drainage Area 2 Drainage Area 3 Drainage Area 4 Receiving Stream Name Stones Creek Turkey Creek Turkey Creek Turkey Creek Stream Class * SA;HQW SA;ORW SA;ORW SA;ORW Stream Index Number* 19-30-3 18-87-1 18-87-1 18-87-1 Total Drainage Area (sf) 2,976,086 10,932,854 496,427 559,977 On-site Drainage Area (sf) 2,976,086 10,932,854 496,427 559,977 Off-site Drainage Area (sf) 0 Proposed Impervious Area** (sf) 726,165 2,667,616 172,433 220,848 % Impervious Area** (total) 24.4 24.4 34.73 39.44 Impervious**Surface Area Drainage Area 1 Drainage Area 2 Drainage Area 3 Drainage Area 4 On-site Buildings/Lots (sf) 308,462 677,014 114,171 137,206 On-site Streets (sf) 111,000 273,990 51,763 77,797 On-site Parking (sf) 0 0 On-site Sidewalks (sf) 0 Other on-site (sf) 0 16,050 Future(sf) 306,703 1,697,317 6,499 5,845 Off-site (sf) Existing BUA*** (sf) Total (sf): 726,165 2,664,371 172,433 220,848 * Stream Class and Index Number can be determined at: http://portal.ncdenr.org/web/uia/ps/csu/classifications ** Impervious area is defined as the built upon area including,but not limited to, buildings,roads,parking areas, sidewalks,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 BUA. Form SWU-101 Version Oct. 31,2013 Page 3 of 6 (Sec 4Ip ;lio-oet( on 4e,4 poile) Phase IV Pond Basin Information Drainage Area 5 Receiving Stream Name Turkey Creek Stream Class * SA; ORW Stream Index Number * 18-87-1 Total Drainage Area (sf) 1,873,846 On-site Drainage Area (sf) 1,873,846 Off-site Drainage Area (sf) 0 Proposed Impervious Area ** (sf) 738,088 Impervious Area ** (sf) 39.39% Impervious **Surface Area Drainage Area 5 �^+ �® On site Buildings/Lots (sf) 352,528 ..+s i '1 ° `"R On-site Streets (sf) 133,500 a? , On-site Parking(sf) 10,030 1 0 �'��� On-site Sidewalks (sf) 1,010 BY: JAN r� Other on-site (sf) 4,010 Future(sf) 237,010 Off-site (sf) Existing BUA*** (sf) Total (sf): 738,088 11. How was the off-site impervious area listed above determined?Provide documentation. Proi ects 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 15A 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 http://portal.ncdear.org/web/w„%ws/su/bmp-manual. Vl. 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://portal.ncdenr.org/web/wq/ws/su/statesw/forms decs. 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:/iportal.ncdenr.ortz/web/wq/ws/su/mans.) 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 ht-.-3://portaLncdenr.org/web/wcilws/su/statesw/formos:ors. ocs. Initi 1. Original and one copy of the Stormwater Management Permit Application Form. /a#)J 2. Original and one copy of the signed and notarized Deed Restrictions&Protective Covenants ASH- ; Form.(if required as per Part VII below) 3. Original of the applicable Supplement Form(s) (sealed,signed and dated)and O&M ma* agreement(s)for each BMP. 4. Permit application processing fee of$505 payable to NCDENR.(For an Express review,refer to In.2 Il http://www.envhelp.org/pages/onestopexpress.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/managementfor PAAil the project. This is required in addition to the brief summary provided in the Project Information,item 1. 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the 'WO- receiving stream drains to class SA waters within'mile of the site boundary,include the i 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: yhJ17 a. Development/Project name. b. Engineer and firm. c. Location map with named streets and NCSR numbers. d. Legend. e. North arrow. ECIEIVE f. Scale. g. Revision number and dates. OCT f 0 2018 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 till l waters,and any coastal wetlands landward of the MHW or NHW lines. BY: j • 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. 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). Form SWU-101 Version Oct.31,2013 Page 4 of 6 p. Vegetated buffers(where required). 1/ 9. Copy of any applicable soils report with the associated SHWT elevations(Please identify / 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 MRCS 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 DEMI.R to verify the SHWT prior to submittal,(910)796-7378.) 10. A copy of the most current property deed.Deed book:4139 Page No: 72-79 MOvN- i 11. For corporations and limited liability corporations(LLC):Provide documentation from the NC NI* Secretary of State or other official documentation,which supports the titles and positions held by the persons listed in Contact Information,item la,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. http://www.sec:retary.state.nc.us/Corporations/CSearchaspx 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 http://portal.zcdenr.orgfweb/lr/state-stormwater- forms c;ocs.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:Mark N.Hargrove,PE Consulting Firm: Port City Consulting Engineers,PLLC Mailing Address:6216 Stonebridge Road City:Wilmington State:NC Zip:28409 Phone: (910 ) 599-1744 Fax: ( ) ° Email:mhargrove@ec.rr.com 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) ,certify 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) with(print or type name of organization listed in Contact Information,item la) 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. OCT 1 Q 2018 tlY: Fozm 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 comple Name/Ownership Change Form within 30 days;otherwise I will be op- - 4 a stormwater treatment facility wi t a valid permit. I understand that the operation of a storm • . ■eatment facility without a valid permit violation of NC General Statue 143-215.1 and may r- '. appropriate enforcement action including the'. essm ivil• penalties of up to$25,000 per day,p. :•ant to NCGS 143-215.6. c Signature: ` '�-C.11 `� Date: CI Li- tie a I, 1 vV 4 ,�r4,. . Notary 'c for the State of ,County of do hereby certify that ,�f Re ci.Arna-V1 personally appeared before me this day of ' ....i t .a i. '. - y -.�',.. a • owledge a due -x- lion o e ap - • ".n a stormwater permit. Witness my • • and official seal, & _- ``1``' ` `N. SEAL _ Q40 - aLi zo zv My commission expires L 1 4 :a d� X. APPLICANT'S CERTIFICATION I,(print or type name of person listed in Contact Information,item la) Lisa Beaman , 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 sto ater es q der NCAC 2H.10at 00 and any other applicable state stormwater requirements. Signature: C/vt Date: _1 - `le I, 1' li41, e- . de ,a N tart'Public for the State of I•1C ,County of ir do hereby certify that VI personally appeared before me this dayof and ac wled xecu� i g of pp atto for a stormwater permit Witness my hand and official seal .::-• - SEAL j y .L.. � \` v. = My commission expires D �J L�l y 1-49 1' ECEIVEI) OCT 1 0 2010 Form SWU-101 Version Oct.31,2013 Page 6 of 6 Pusey, Steven From: Mark Hargrove <mhargrove@ec.rr.com> Sent: Wednesday,January 16,2019 3:16 PM To: Pusey,Steven Subject RE: [External] RE:Oyster Landing Subdivision- Phase 4 boa9TIO'N' External email. Do not click links or open attachments unless you verified.Send all suspicious email as an attachment to _Milk Alain The entire subdivision is considered"Low Density" whenever runoff drains to the roads that have curb&gutter...it is directed to a pond thus the need for the pond supplements. Some of Phase 4 is Low density and yes....the part of Phase 4 that is low density is included in the Drainage Area 1 numbers on Page 3 Mark N. Hargrove, PE Port City Consulting Engineers, PLLC 910-599-1744 From: Pusey, Steven [mailto:steven.pusey@ncdenr.gov] Sent: Wednesday,January 16, 2019 2:29 PM To: Mark Hargrove Subject: RE: [External] RE: Oyster Landing Subdivision -Phase 4 Mark, Just for clarification,is the entire drainage area DA1 permitted for low density? It seems this way from the way it is worded. Also,to further clarify,it appears that some BUA in Phase 4 is considered low density(i.e-the northern road and cul-de- sac). Is this part considered as being located in DA1? If so,is that BUA included in the DA1 section of the application page 3? Steve From:Mark Hargrove<mhargrove@ec.rr.com> Sent:Wednesday,January 16,2019 8:28 AM To:Pusey,Steven<steven.pusey@ncdenr.gov> Subject: [External] RE:Oyster Landing Subdivision-Phase 4 ;,External email. Do not click links or open attachments unless you verified.Send all suspici mail attachment to 1:CAUTIONI Steve, Drainage Areas 1&2 on Page 3 of 6 of the application are the two main drainage basins....one is the drainage area for Stones Creek(Area 1)and the other is for Turkey Creek(Area 2). Drainage Areas 3,4&5 all are sub basins within Area 2 1 Pusey, Steven From: Mark Hargrove <mhargrove@ec.rr.com> Sent: Wednesday,January 16, 2019 8:28 AM To: Pusey, Steven Subject: [External] RE:Oyster Landing Subdivision - Phase 4 Attachments: Area 5 011619.pdf; Page 3 of 6 011619.pdf; Storm Water Narrative 011619.pdf External Widii.Do not click linf,i or open attachments unless you verified.Send aPi s' picious ema as an attachment t: Steve, Drainage Areas 1 &2 on Page 3 of 6 of the application are the two main drainage bas;ns....one is the drainage area for Stones Creek (Area 1)and the other is for Turkey Creek(Area 2). Drainage Areas 3,4&5 all are sub basins within Area 2 since they each have individual ponds treating runoff that drains to the road ....thus the need for ponds (and they drain to Turkey Creek). The impervicus area amounts shown for Drainage Area 3,4&5 all are included within Drainage Area 2. They do not additional impervious area....the numbers shown for Area 2 include the numbers shown for Areas 3,4& 5 . I did see where I have a number incorrect on Page 3 of the application for Drainage Area 2....the future impervious area needed to be lowered so that when you add the total impervious area for Drainage Area 1 &2....they equal 3,390,536 sf....this is the total amount of impervious area permitted for Oyster Landing. I also notice I need to revise the storm water narrative calculations....page 2 of the narrative I needed to revised the paved area and future impervious area numbers so that they matched the permit application. Nothing else needed to be changed. I am attaching the revised Page 3 of 6 of the application along with the sheet for Area 5 and noted that Area 3 is for Phase II.....Area 4 is for Phase Ill.....and Area 5 is for Phase IV. Also attached is a revised narrative where I corrected the impervious area on the top of the second page. This should clear things up....if not let me know. Thanks Mark N. Hargrove, PE Port Ci'..y Consulting Engineers, PLLC 910-599.1744 From: Pusey, Steven [mailto:steven.pusey@ncdenr.gov] Sent: Tuesday, January 15, 2019 5:43 PM To: Mark Hargrove (mhargrove@ec.rr.com) Subject: Oyster Landing Subdivision — Phase 4 Importance: High Mark, 1 I'm trying to put together the permit for subject project and I'm having trouble with understanding the overall BUA numbers. The previous permit had a value of 2,683,645 sf for BUA in overall drainage area 2 (Turkey Creek). This amount was supposed to include the BUA for DA3 and DA4 ponds, correct? Now,you are adding BUA for phase 4 which includes the new DA5. So, shouldn't the BUA in overall drainage area 2 (Turkey Creek)go up? However,the new BUA value for overall drainage area 2 is listed as 2,667,616, which is 16,029 less than the previous amount of 2,683,645 sf. Please explain. For overall drainage area 1 (Stones Creek),the BUA has gone up by 19,274 sf to 726,165. Is this due to the addition of Phase 4? Other changes? Thanks, Steve Pusey Steve Pusey, El Environmental Engineer II Division of Energy, Mineral and Land Resources State Stormwater rrogram Department of Environmental Quality 910 796 7215 office 910 796 7334 direct steven.eusevCo noci_enr_aov 127 Cardinal Drive Ext. Wilmington,NC 28405 r k:JLr _ { Before printing this email,please consider your budget and the environment. Virus-free. aYvAv.avast.com 2 Pusey, Steven From: Pusey,Steven Sent: Tuesday,January 15,2019 5:43 PM To: Mark Hargrove (mhargrove@ec.rr.com) Subject Oyster Landing Subdivision-Phase 4 Importance: High Mark, I'm trying to put together the permit for subject project and I'm having trouble with understanding the overall BUA numbers. The previous permit had a value of 2,683,645 sf for BUA in overall drainage area 2(Turkey Creek). This amount was supposed to include the BUA for DA3 and DA4 ponds,correct? Now,you are adding BUA for phase 4 which includes the new DA5. So,shouldn't the BUA in overall drainage area 2 (Turkey Creek)go up? However,the new BUA value for overall drainage area 2 is listed as 2,667,616,which is 16,029 less than the previous amount of 2,683,645 sf. Please explain. For overall drainage area 1(Stones Creek),the BUA has gone up by 19,274 sf to 726,165. Is this due to the addition of Phase 4? Other changes? Thanks, Steve Pw.ce1 Steve Pusey, El Environmental Engineer II Division of Energy, Mineral and Land Resources- State Stormwater Program Department of Environmental Quality 910 796 7215 office 910 796 7334 direct steven.Duseycncdenr.gov 127 Cardinal Drive Ext. Wilmington, NC 28405 � g rat QndAResowcxs i'iVI.Oxwfn.y QV.4U.♦ Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. Before printing this email,please consider your budget and the environment. 1 WET DETENTION POND ANALYSIS-ALL RULES FILE NAME: G:\\\Stormwater\Permits&Projects\2007\070653 HD\2019 01 excel_WP 070653 PROJECT#:SW8 03 REVIEWER: Piney Initial Run Date 1/15/19 PROJECT NAME: OxsierLanding S/D DA#5 Last modified 05-May-21 Receiving Stream: Turkey Creek Class: SA Drainage Basin: White Oak Within 1/2 mile? IN. Y or N Index No. 18-87-1 Site Area 319.00 acres (-'Drainage Area . 1873848 00 sf Is new DA being added? Y Y or N New Added DA 0 00 sf Rules-"2008"or"Ph2" 2003 Total DA 1873846.00 sf IMPERVIOUS AREAS-BUA Runoff C Buildings 352528.00 square feet 1 user input req. Street 133500.00 square feet 0.98 formula Parking or SW 11040.00 square feet 0.95 Future 237010.00 square feet 77 Breakdown of BM ED old D5 Offsite square feet 7? Buildings/Lots Other 4010.00 square feet ?? Street BUA at Old DSI _ square feet ?? Parking/Sw TOTAL 738088.00 square feet Other SURFACE AREA CALCULATION(including old and new DA and BUA) Overall%Impervious 39.39% SA/DA Ratio 1.08% (Average Design Depth 12 feet Req.SA 20269 sf TSS,85 or 90: 90 % Prov.SA 18537 sf TEMPORARY POOL AND FOREBAY VOLUME CALCULATIONS Old DST, 1 New DSO )Drainage Area 0 1873846 sf BUA 0 00 738088.00 sf Post development Rv= 0.000 0.405 unitless Old BUA Design Storm inches Old BUA Design Volume 0 1.5"New BUA Design Storm Volume 94746 1 yr.24 hour precipitation depth(inches)from NOAA chart 3.7 Predevelopment Rv value(0.05 if no existing BUA) 0.05 Note:do not include previously approved BUA as existin! 1 yr.24 hr. Pre-development volume 28888 cubic feet 1 yr.24 hr. Post-development volume 233708 cubic feet 2008 Design Volume 94746 cubic feet Phase 2 Design Volume 94746 cubic feet Required Volume 94746 cf Area,sf Inc.volume Acc.volume Top of Sediment 30.00 msl 181729.00 0.00 0.00 Bottom of Shelf 44.50 msl. . . . 423791.00 4245020.00 4245020.00 Permanent Pool 45.50 msl 429937.00 426864.00 ' 4671884.00 Top of Shelf 45.50 msl. 429937.00 0.00 4,671884.00 Temporary Pool 45.80 msl. . . 453137.00 132461.10 4804345.10 Volume met at elev 45.71 msl FOREBAY C *'Vol. Prov. at TPE 132481 cf Perm. Pool Volume= 4671884 **only wi:rks if WE>top of sh,• elevation Req. Forebay Volume= 934377 Provided Volume= 81875 Percent= 1.8% Calculated Average Depth,feet= 10.51 Max Pump HP 3 ORIFICE CALCULATION Average Head 0.10 feet Q2 Area _ 51.85 sq.inches Flow Q2,cfs 0.548 cfs Q5 Area= 20.74 sq. inches Flow Q5,cfs 0.219 cfs Orifice Area= 50.27 sq. inches No. of Orifices 1 Avg. Flow Q= 0.531 cfs Diameter, inches 8.00 or weir H x W in x in Drawdown= 2.1 days '#of end contractions, N= 1 yr 24 hr intensity, in/hr 0.16 NOAA chart©t discharge coefficient,C= 3.27 Runoff Coefficient 0.42 unitless Effective weir length, L= 0.00 1 yr 24 hr peak Q 2.86 cfs Orifice flow<1 yr24hr? YES-OK WET DETENTION POND ANALYSIS-ALL RULES FILE NAME: G:\\\Stormwater\Permits&Projects\2007\070653 HD\2019 01 excel_WP 070653 PROJECT#:SW8 070653 . REVIEWER: Pussy Initial Run Date 1/15/19 PROJECT NAME: Oyster Landing S/D DA#5 Last modified 15-Jan-19 Receiving Stream: Turkey Creek Class: SA Drainage Basin: White Oak Within 1/2 mile? N Y or N Index No. 18-87-1 Site Area 319.00 acres @Drainage Area 1873846.00 sf Is new DA being added? Y Y or N New Added DA 0.00 sf Rules-"2008"or"Ph2" 2008 Total DA 1873846.00 sf IMPERVIOUS AREAS-BUA Runoff C Buildings 352528.00 square feet 1 user input req. . Street 133500.00 square feet 0.98 formula Parking or SW 11040.00 square feet 0.95 Future 237010.00 square feet 7? Breakdown of BUA CO old DS Offsite square feet ?? Buildings/Lots Other 4010.00 square feet ?? Street BUA at Old DSO square feet ?? Parking/SW TOTAL 738088.00 square feet Other SURFACE AREA CALCULATION(including old and new DA and BUA) Overall%Impervious 39.39% SA/DA Ratio 1.08% (Average Design Depth 12 feet Req.SA 20269 sf TSS,85 or 90: 90 % Prov.SA 18537 sf TEMPORARY POOL AND FOREBAY VOLUME CALCULATIONS Old DSO New DSO ®Drainage Area 0 1873846 sf BUA _ 0.00 738088.00 sf Post development Rv= 0.000 0.405 unitless Old BUA Design Storm _�inches Old BUA Design Volume 0 1.5"New BUA Design Storm Volume 1 94746 1 yr.24 hour precipitation depth(inches)from NOAA chart 3.7 Predevelopment Rv value(0.05 if no existing BUA) 0.05 Note:do not include previously approved BUA as exstir 1 yr.24 hr.Pre-development volume 28888 cubic feet 1 yr.24 hr.Post-development volume 233708 cubic feet 2008 Design Volume s14746 cubic feet Phase 2 Design Volume 94746 cubic feet Required Volume 94746 cf Area,sf Inc.volume Acc.volume Top of Sediment 30.00 msl 161729.00 0.00 0.00 Bottom of Shelf 44.50 msl 423791 00 4245020.00 4245020.00 Permanent Pool 45.50 msl 429937 00 426864.00 4671884.00 Top of Shelf 45.50 msl 429937 00 0.00 4671884.00 Temporary Pool 45.80 msl 453137.00 132461.10 4804345.10 Volume met at elev 45.71 msl FOREBAY ""Vol.Prov.at TPE 132461 cf Perm.Pool Volume= 4671884 "only works if TPE>top of shelf elevation Req.Forebay Volume= 934377 Provided Volume= 81875 Percent= 1.8% 'Calculated Average Depth,feet= 110.51 Max Pump HP 3 ORIFICE CALCULATION Average Head 0.10 feet Q2 Area: 51.85 sq.inches Flow 02,cfs 0.548 cfs Q5 Area" 20.74 sq.inches Flow 05,cfs 0.219 cfs Orifice Area= 50.27 sq.inches No.of Orifices 1 Avg.Flow Q= 0.531 cfs Diameter,inches 8.00 or weir H x W in x in Drawdown= days '#of end contractions,N= 1 yr 24 hr intensity,in/hr 0.16 NOAA chart @t discharge coefficient,C= 3.27 Runoff Coefficient 0.42 unitless Effective weir length,L= 0.00 1 yr 24 hr peak Q 2.86 cfs Orifice flowe1yr24hr? YES-OK Pusey, Steven From: Pusey, Steven Sent: Thursday,January 10, 2019 9:49 AM To: 'Mark Hargrove' Subject: RE: [External] RE: Oyster Landing Subdivision Sounds great! From: Mark Hargrove<mhargrove@ec.rr.com> Sent:Thursday,January 10, 2019 9:40 AM To: Pusey,Steven <steven.pusey@ncdenr.gov> Subject: RE: [External] RE: Oyster Landing Subdivision t J;y a email. Do not click links or opei,. chments unless you��^erified.Send d iclous etna�k;:all attachment to 'Mak xernl email - I have 4:1 sideslopes above the vegetative shelf everywhere except where the"Play Area" is located on the one side of the pond. I used 4:1 because I wanted it a little flatter due to the height differential between the normal pool elevation and top of bank in some areas....I will note the sideslopes on the plan view portion of the pond on sheet C-5.0 Mark N. Hargrove, PE' Port City Consulting Engineers, PLLC 910-599-1744 From: Pusey, Steven [mailto:steven.pusey@@ncdenr.gov] Sent: Thursday, January 10, 2019 9:18 AM To: Mark Hargrove Subject: RE: [External] RE: Oyster Landing Subdivision Yes,that's fine. Also, please make sure you show a 3:1 slope somewhere above the vegetated shelf. Thanks, Steve From: Mark Hargrove<nrhargrove@ec.rr.com> Sent:Thursday,January 10, 2019 9:15 AM To: Pusey,Steven<steven.pus 1t ncdenr.gov> Subject: RE: [External] RE: Oyster Landing Subdivision • External email. Do not click tubera nattmhments unless you verified.Send ail stispiCious erg as zin ottochii- t to c. Question for you.....for this pond.....I was showing 10:1 sideslopes where the outlet is shown....that is where we will have a flatter area for people to play in the pond Linda was ok with this...believe I provided an email about this. i So I need to leave the slope as 10:1....will change the 1.5" storage elevation Will that be ok Mark N. Hargrove, PE Port City Consulting Engineers, PLLC 910-599-1744 From: Pusey, Steven [ma ilto:steven useynrcd,-•-ir.gov] Sent: Thursday, January 10, 2019 8:58 AM To: Mark Hargrove Subject: RE: [External] RE: Oyster Landing Subdivision Mark, All looks good on the new supplement and calculations. However, I did notice one discrepancy on plan sheet C 5.0. The top of the outlet structure is labeled as 1.5" storage=46.5 elevation. Shouldn't this be labeled as a larger storm? Your design for 1.5" storm is at elev.45.8', right? Also, please show the correct side slopes below and above the outlet structure (i.e.-should be 6:1 below, at least 3:1 above). Please revise this plan sheet and resubmit 2 copies. That should do it. Thanks, Steve • From: Mark Hargrove<mhargrove@ec.rr.com> Sent:Thursday,January 10, 2019 7:31 AM To: Pusey, Steven<stevenpusty_3ncdenrjov> Subject: [External] RE: Oyster Landing Subdivision Externa email Dc, not click Links or open attechmtnts unless you verified.send all suspicious emai3' a an attachment to ort.spam( nc.goy Steve, Attached is an updated Pond Supplement and updated calculations. Let me know if you need anything else thanks Mark N. Hargrove, PE Port City Consulting Engineers, PL.LC 910-599-1744 From: Pusey, Steven [mailtoatevenpusey(ancdenr.gov] Sent: Wednesday, January 09, 2019 4:46 PM To: Mark Hargrove (rnhargrpve(a ec.rr.com) Subject: Oyster Landing Subdivision Importance: High 2 Mark, I reviewed the information for Oyster Landing today. It appears that the wet pond Supplement needs to be revised to match the new BUA allocation for Phase IV. Reference the top section of the Supplement. In addition, since the BUA percentage has increased,does this change the design in any way? Please advise ASAP. Thanks, Steve Puse� Steve Pusey, El Environmental Engineer II Division of Energy, Mineral and Land Resources—State Stormwater Program Department of Environmental Quality 910 796 7215 office 910 796 7334 direct steven. usey0 nc.:ueri be i 127 Cardinal Drive Ext. Wilmington, NC 28405 Email correspondence to and .:t t _. N rih Carolina Public Records ._ . ,.r: ..._, _ Before printing this email please consider your budget and the environment. Virus-free. vww.avast.cor; 3 �' -- -. SI p M CI $ir4 a a a m m N A= ! . 3 .. � a � g � � m w- = z vp CD. _ = ort� ; mra—Mmcooy co 'ft A ia 161; N) ZI if- e awR. 41ggiriga —g P ^Oyu SL: m e g - R coc ,' fit`. i co cam m a n a itrrrr7�rnul�uuUtt�wit w$ ro 8 8 3 O im 9 i a- W a'IR. I fF m o a (p17:co,g'z ! 1 a I. I� I6ISI� _ 1 ' 1 0 - i?I Q 7 �.._...-�_I-._._. c m m inr‘ IV �tc,R I co I Q a 3 mio..= m izr to.t...to _ 1 m m CO +" cra 1 � I m C o. I cri rn NI ' rn a. I m N `, i TI 0 L 1 I I {') s•5.om a.8 m 3 ? n m o o v I C w g is a@ 0) m c o c S w a _m 5 a5 m a N > ffi EL so, a -a i 0 rn w`wcD o F. 0141) mS 2mvgmw 0 rr mv�'i _2 °gb � M -o m w = a- m 3 .� .� m ; aQ a o ' I I I Qw,a Q,mm 1� 3 o f� @ 3 � f7 !N a. r n13 Z 0 UI � � ili 3 ! t 0 a. I eh `° S. z o 3la "Ijil �ria° 3 i-I. qH I I i 3 a 7 Q to mo. ! S N 0 `. at n co o-. ' U Q .< m % 0 �; _ m' I m re' I n-- a 3 w. Qs Itl 3 a l t ,a to m O. J -. a N tp, a N N Nr ,P N N N N N - - - C W W W N � T O 0 C O O O p .1.411 2. 3 G I� t2 p W, p w < m p D p m m m * D G fn y D p w m Z 3: z6 a D : ; m g• m = m o m m ° m a m m m m m e o e ° 'WI O ° m a Q m l 5/ -i.- 1) m < w w w c y g m m w a ; 7 Em 8 w 8 Si �°!!G rn I m $ - w a a w 3 g 0 g o 3 . g 0 3 0 g m m r- m r ao a o co Z5 m g c 2° °� °{TeaY ° a m = 3 = _ = c n m O 5 m 9' m O n m y Z D = •2 ( $ —' a , A a w °r c m � a 3 O g l .a n 0 B, 0 m 41 g y IC : c F n m ,- m o' � 1SSc , c omi m = a,m "1 a = F . °4 S, c g m m $- m m c m °, m -" n s m c 0- n a TY 3 5 _ D 5 m = v RI. O $ O m e , 7 7 g a m m g a g 9 m r a 0 m c a a 7, w -I m ^w m m m a o = o 0 0' m-o 3 m c °2, x = m _ 3 c° a o 0 3 = m m 3 C 3' - m v 7 g O g S 51 x m m m Z m -DI I=m c m m" .mc 3 ® o m �' a vm $ d C. - _ a v a .3.' rem D 0 °•Y O 1°- 3 c• 3' = p v 5 = m 3 .9N S n °. g r, N_ IF nS m9 am gMm <• 3. X . m y8 * O oN•.�. 8 nw 333 G' m• W iAm w M. f° 3 3 m M m 8 m = 3 w a3i = °o •$ .m=.. m c o ay to c 2 5 m w O m m Ia $ '° m _ .. ° a $ o nn 3 5 w jj m a 2 3 _GGv 4 . y c 4 � 3 / o . m a m v F a D VJ Y 3' 15 m S •SL• m R, • 0 ' ° 5 a n� o m Q N w R. a; 3 0 'm 1 3 D. m 0 w $ ' ■ e ,0 is- @ m S. m CO = m S �1 o N w MI sk p m ° O I Q 'a = O N m r 191 S. CRI m _ n'�� Ns am aam m:* F �g m = co f �0.'m 7 v ? Y III V� . mom 1i � m �" Q I 0_m ° a Y ° -co arc y 4 3 Dg I mF , 1 Et C w II w < , 3 N m t', 'g"1 ! I = 3 p� p� co y {p a. �p yw Z. N I if O m O O C m = 'C N Pt N O Z N 0 ED S •L Z Z { O OD 3 5. w = w = _ a a 3 a, ci o 0 0 o W p 5 $ o o $ 6 ao 4, a 3, of at a. 3 F ice. 0 _ F. F. O O [A m m r y CO w 0 p p _ m 3 m E. O A v_i v m ~ _ y D m $ $ m o m m ° n w m o pc = e = W g °m o� a m 7e a $ m a .- H p w m a m R = g a g g. CD ami w y 3 a C m n A. 7 a E. 0: m' 3 a s = g g °, ° 0 3 a g m m co g g ' 0 5 a v f •3 d m= g e s, m w a = a Si m m < _ _ m a a n m m $ 3 a' p 0) x 7- 7 3 n d o m a 3• a5. m c °o '$ m ° 3 re m 05 n m v C 3 c m 3 1 ill a m m mg. m = m aa Z' '" O V f° �. C i 7 a N g m m m w °. _ _ o 2 w N 2 n " = A I m - -0m0 . : ma g3m3c) a 8 ISaa o SIf a Q3 a' 3 8 3 w m I $ w m COo c z .mom, n v R. .^°. 3 8 I 0 = a• m 8 m m 8 - 7 3 = m i m m m m c a m w o a c m la 3 5i m = c a m c m g m 5 Sg, 2 °x Q a °q q m ° a 5. a v 8 $ m 8 O ' q2q F.0.• 0 p ro n E a °. m m o m 5' m $ -, m F m 13 O J '4 m = a p m H R G) 2 3 m 8 2 • 031 O. v m n J $ E. p m 3 p w o n� g pr c ¢ a m °� m n C) g 0. i i, m a. i° • 3 m v i m o x• a WI on U ri .- -1 5- I 111 1 0 a ° Y P O na r 1 � - o. t7:3=" .i7 o c l : I �' c3 `E m m + y Tel 8 m o 3 m >• 6 6 m y m : m m m $i u '?" ao N N o i'w w w w w 3, m o S co o y A_ N_ Ul 0 3 At. N O F+ CO OYSTERA.ND!NG PHASE V STORM WATER CALCULATIONS FOR NCDEQ SEA FikliBER, 2018 FAP:SED 1/10/19 r�ESS,p - Q SEAL r P. 19742 gi %N./4440ml N 11 flECEIvE JAN 1 0 2019 BY: Port City Consulting Engineers, PLLC 6216 Stonebridge Road Wilmington, North Carolina 28409 (910) 599-1744 License #k P-1012 Oyster Landing Pond — Phase IV Total Area Draining to Pond= 1,873,846 SF = 43.02 AC Total Proposed Impervious Surface Area Draining to Pond: 88 Lots 4,006/lot = 352,528 sf Pavement = 133,500 sf Clubhouse Pavement = 10,030 sf Clubhouse Bldg = 1,000 sf Clubhouse Sidewalk = 1,010 sf Clubhouse Pool Concrete = 4,010 sf Future Impervious Area = 237,010 sf 738,088 sf — 16.94 ac Impervious draining to pond = 738,088/1,873,846 = 39.39% Required Storage for 1.5-Inch of Runoff For Pond: (use Schueler Method) = 0.05 + 0.009 (I) = 0.05 + 0.009(39.39) = 0.405 = (1.5")(0.405)(1/12)(1,873,846) = 94,746 cf (135,716 cf provided @ elevation 45.80) POND DEPTH SA/DA % POND SURFACE AREA (MIN.) (FT) (SF) 8.0 0.73 13,679 11.01 Calculated If Avg Pond Depth = 8.0 ft, minimum surface area = 13,679 sf Used Coastal chart to size pond Area @ elevation 45.50 = 429,937 SF > 13,679 sf Required storage for forebay: Note: pond is so large compared to what is required, forebays are impractical to size for 20% of the permanent pool volume. The surface areas of the two forebays combined are larger than what the pond size is required in surface area. Pond Volume Contour Incremental Cumulative Elevation Area Volume Volume (ft) (sf) (cf) (cf) Bottom Elevation 30.00 161,729 0 0 34.00 182,863 689,184 689,184 35.00 290,869 236,866 926,050 38.00 323,801 922,005 1,848,055 40.00 346,100 669,901 2,517,956 41.00 363,181 354,641 2,872,597 42.00 380,313 371,747 3,244,344 43.00 397,716 389,015 3,633,358 44.00 415,166 406,441 4,039,799 44.50 423,791 209,739 4,249,538 Permanent Pool 45.50 429,937 426,864 4,676,402 Forebay 1 Volume Contour Incremental Cumulative Elevation Area Volume Volume (ft) (sf) (cf) (cf) Bottom Elevation 40.00 4,970 0 0 41.00 5,902 5,436 5,436 42.00 6,904 6,403 11,839 43.00 7,973 7,439 19,278 44.00 9,110 8,542 27,819 44.50 9,703 4,703 32,522 Permanent Pool 45.50 10,942 10,323 42,845 Note: The pond was so large compared to the required size, the forebays could not be size for 20% of the permament pool volume. The forebays shown are almost as large as the required pond. The forebays don't fit any design criteria but are large enough to function for the large pond. Forebay 2 Volume Contour Incremental Cumulative Elevation Area Volume Volume (ft) (sf) (cf) (cf) Bottom Elevation 40.00 3,786 0 0 41.00 4,892 4,339 4,339 42.00 6,069 5,481 9,820 43.00 7,319 6,694 16,514 44.00 8,641 7,980 24,494 44.50 9,329 4,493 28,986 Permanent Pool 45.50 10,759 10,044 39,030 Contour Incremental Cumulative Elevation Area Volume Volume (ft) (sf) (cf) (cf) Normal Pool 45.50 451,638 0 0 1.5"Storage Level 45.80 453,137 135,716 135,716 (FT) (CF) (CF) (CFS) (HOURS) 45.80 135,716 135,716 0.531 70.9 45.50 0 . TOTAL HOURS 70.9 DAYS 3.0 CONTROL PIPE : 8 INCH ORIFICE HOLE USED ORIFICE EQUATION TO DETERMINE OUTFLOW RATE Q = Cd*A*(2gh)"1/2 PORT CITY CONSULTING ENGINEERS, PLLC aE Q OCR UPAKSMIIITIAL 6216 STONEBRIDGE ROAD DATE 1/10/19 JOB NO. WILMINGTON, NORTH CAROLINA, ATTENTION 28409 PHONE# (910) 599-1744 RE . Oyster Landing Subdivision Phase IV Storm Water Permit SW8 070653 TO: Steve Pusey NCDWQ 127 Cardinal Drive Wilmington, NC 28405 WE ARE SENDING YOU ®Attached 0 Under separate cover the following Items: ❑Shop Drawings ❑ Prints 0 Plans 0 Samples 0 Specifications ❑Copy of Letter 0 Change order 0 Diskette ❑ Permit Forms COPIES DATE NO. DESCRIPTION 2 Revised Sheet C-5.0 THESE ARE TRANSMITTED as checked below: ❑ copies for ® For approval ❑ Approved as submitted Resubmit approval copies for ❑ For your use ❑ Approved as noted ❑ Submit distribution ❑As requested ❑ Returned for corrections 0 Return corrected prints 0 For review and comment ❑ ❑ FOR BIDS DUE 20 ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: txt+: COPY TO: File SIGNED: If enclosures are not as noted,kindly notify us at once. Application Completeness Review Checklist Project Name: []y j La.,G�, -, .5:-�-*!, ,e, Date Delivered to WIRO: )� / ,1 / 11 ,_ r LiBIMS Received/Accepted Date:G, ., / 7 Z $k Project County/Location: t,24 1(o c-' *BIMS Acknowledged Date: Rule(s): 02017 Coastal 02008 Coastal 01995 Coastal DPhase II D iniversal 01988 Coastal Permit Action: New Major rr Mort/Minor Mod/Renewal/Transfer * `New Permit#: Permit Type: P-tLD/ LD Overall/HD&LD Combo LijExisting Permit#: 5L.,) o 7 ,. - General Permit/Offsite/ Exempt/Rescission DPE Cert on File? SCM Type(s): P17)'1-r}" _ Offsite to SW8: Development Type:---.Commercial/ es titil/Other EDMaster PE Cert on File? Subdivided?. Subdivisi n or Single Lot For New or Tr rred Permits Permittee is: Stream Class: S/I Q rk- Property Owner(s) Developer []Lessee EPurchaser EHOA i 6. SA.Map nORW Map Paperwork Emailed Engineer on: Supplement(s)(1 original per BMP) III 0: Li i ith correct/original signatures(1 original per BMP except L5/VFS and swales) M Applicati•. • ith correct/original signatures 9gc-v.1 #'j, //Q Email Address: Design Engineer III Corp or LLC: Sig,Auth.per SoS or Signature Authorization letter or report 13 mail Address: Property Owner ' ,D$505(within 6mo) Cherk##(s): S k/ `i-- END Fee Deed Soils Report:w/SHWT or General Report Email Address: Lessee Calculations(signed/sealed) � `'v,4 /r 7 119 OLease Agreement Deed Restrictions, if subdivided: DEmail Address: Purchaser ❑**Signed & Notarized Template Purchase Agreement ' ECorrect Template (Comm/Res& HD/LD) or Dec. Covenants& Rest. Email Address: Developer Recorded Covenants DErnail Address: HOA Representative tL jRecorded Plats D50%0 or more Lots Sold List Diroject Narrative DUSGS Map Plans - aSets Wetlands: Delineated or No Wetlands Vicinity Map Project Boundaries ELegend Eltayout(proposed EIUA dimensions) EIDA Maps Details (roads, cul-de-sacs, curbs, sidewalks, BMPs, Buildings, etc) ®Existing Conditions ❑L� dscape Plan • Grading Ea E Seal - REVIEWER NAME: NOTES TO REVIEWER: *Enter BIMS Acknowledged Date on this Sheet. **FOR NEW Projects-Enter New Permit#on ' .- 5.-4,t_sr-- Supplements&Deed Restiction Templates. :WQ\\\Reference Librarv\Procecures\Checklists\Completeness Review checklist 2018 03 13 Pusey, Steven From: Mark Hargrove <mhargrove@ec.rr.com> Sent: Monday, December 10, 2018 7:14 AM To: Pusey,Steven Subject: (External]Oyster Landing Phase IV CAUTION: it click links or open attachments unless verified.Send all suspicious email as an attachment to Resort Ssam: _ _ Steve, I will drop off revised plans today in regard to the changes that NCDOT requested....we talked about this a couple of weeks ago. Only Transom Way changed....the pond did not change nor did the amount of impervious area. I changed the impervious area numbers for the road and future for Area 5 only. Mark N. Hargrove, PE Port City Consulting Engineers, PLLC 910-599-1744 Virus-free. www.avast.com 1 PORT CITY CONSULTING ENGINEERS, PLLC amnia or ITRAKMOnnt, 6216 STONEBRIDGE ROAD DATE 12/10/18 JOB NO. WILMINGTON, NORTH CAROLINA, ATTENTION 28409 PHONE# (910) 599-1744 RE Oyster Landing Subdivision Phase IV Storm Water Permit SW8 070653 TO: Steve Pusey ,? 'I NCDWQ iH1 DEC 1 0 201 127 Cardinal Drive - --- ii Wilmington, NC 28405 WE ARE SENDING YOU ® Attached ❑ Under separate cover the following items: ❑Shop Drawings ❑ Prints ❑ Plans ❑ Samples ❑ Specifications ❑ Copy of Letter ❑ Change order 0 Diskette 0 Permit Forms COPIES DATE NO. DESCRIPTION 2 Revised Page 3 of the main application 2 Attachment for Page 3 for Area 5 Copies of revised Plans (Cover, C-1, C-2.1, C-2.2, C-2.21, C-2.3, C-2.31, C-2.4, C-2.41, C-2.5, C-2.51, C-3.0, C-3.1, C-3.2, C-3.3, C-3.4, C-3.5, C-3.51, C-5.0, C-5.1, C-5.2 2 & C-5.3) THESE ARE TRANSMITTED as checked below: ❑ copies for ® For approval 0 Approved as submitted Resubmit approval copies for ❑ For your use 0 Approved as noted 0 Submit distribution ❑As requested ❑ Returned for corrections 0 Return corrected prints ❑ For review and comment ❑ ❑ FOR BIDS DUE 20 ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: I had to change the width of Transom Way per the request of NCDOT so I had to revise the impervious numbers. The overall impervious number did not change. The "Onsite Streets" number and "Future" impervious number changed. COPY TO: File b SIGNED: /4.-i/f4,441.49‹,/ ._ If enclosures are not as noted,kindly notify us at once. Application Completeness Review Checklist Project Name: _Di s l zRc p r J — CL'D '04_ / V Date Delivered to vvlRO: I O 2-ey I r _ BIMS Received/Accepted Date: ' 0 . Project County/Location: _ *BIMS Acknowledged Date: ERule(s): 9 02017 Coastal 02008 Coastal ` =1995 Coastal ®Phase !! j :Jniversal _L988 Coastal Permit Action: New a orQoa�/Minor Mod/Renewal/Transfer •* few Permit#: Permit Type: HD/1 ) D Ovef /HD&LD Combo fisting Permit#: L) 7 C, Ca 0 General Permit/Offsit mpt/Rescission �PE Cert on File? SCM Type(s): ( ��--{ pi Offsite vo SWil: Development Type: Commercial/Residential/Other ®Master PE Cert on File? Subdivided?: Subdivision or Single Lot For New or Transferred Permits Permittee is: i Stream Class: Property Owner(s) ODeveioper Lessee :Purchaser DHoA DSA Map ❑ORW Map Paperwork Emailed Engineer on: pllement(s) (1 original per BMP) EiO&&M with correct/original signatures(1 original per BMP except LS/VFS and swaies) Application with correct/original signatures �Emai!Address: Design Engineer Corp or LLC: Sig. Auth. per SoS or Signature Authorization letter or report EErnail Address: Property Owner S05 (within 6mo) Check#(s): ( /Ce ENO Fee Deed ❑Soils Report: w/SHWT or General Report Email Address: Lessee �Calculatians (signed/sealed) Lease Agreement eed Restrictions, if subdivided: Email Address: Purchaser **Signed & Notarized Template Purchase Agreement Correct Template(Comm/Res & HD/LD) or Dec. Covenants &Rest. Email Address: Developer pRecorded Covenants ElEmaii Address: HOA Representative Recorded Plats 050%or more Lots Sold List Project Narrative DA-GS Map Plans 1111ets Wetlands: Delineated or No Wetlands icinity Map ®project Boundaries F'gend 111 -gout (proposed 13UA dimensions) D"'"Maps retails(roads, cul-de-sacs,curbs, sidewalks, BMPs, Buildings, etc) Existing Conditions Landscape Plan E. adingE Seal REVIEWER NAME NOTES TO REVIEWER: -`Enter BIMS Acknowledged Date on this Sheet -, 5-L4-7e- -,.. *FOR NEW Projects-Enter New Permit#on Supplements& Deed Restiction Templates. ?:: (4-1-111 ln. -/- d /fieS , ► i es +Lit [.A, _..-I Ci- c7 G:WQ\y\Reterence Library\Procedures\CheckEists\,Completeness Review Checkliste.2018 03 13 - 3,, ------ ., r• if i I * \\I-----:....--)44. . .. r-.- . ,---, ----''''44-*---•__ /4, .1k V'N's. —' 4, k • - -•-4-.-111 -11. 4,04riit,.. Pt-a• , 1..i!, >Nc-- / 1 .., ---, , s--- --- . ,, ,A; 7 -- .' )------ -- --- ----ili-111%%.V__.'•-• ' idliP ;I, ,I.; I •iji•mn.\ A 0 ii. ---- •--,____, 1 „, ",";,\';.\ \ • '‘', V. '-,', ...I______ "(-;"•-• if-liir‘ n,-ijo,„---- - 00 i, . • ,-- f , ./..:„ . li. i ir,-7 ff .\ ) ,',4 '....'7:..'a.ailik... _ • 'MN i.... ,.-- ---/----, . .,,., \ ,. JR ----- - • ..----- 14111 \\\ . NI' 'r r •..-. .. , 1----) •-;., ,, ( ',1•,I \ . / 0 ' /, .9 ' {4...y t, 4 I .."'\%, .-..‹."--''-•,,,:••‘1,t, \\\'....../ : , " .- •. Ss" i ( I" 1 L ...._ \ ., 1 . __ „ ,s,) :„..---,4k-----„ \ k i• l, 1--_,1,.; I. .1,- - .- .," 11 li i 04; ...dimi.... lir 1 \ ' \ i„ . I ____ - It 1 11;t1 . I c a, ) ,...1) I! 2 . I 0 1. `0 4000011'''N\ , 4' CO , .,,,,L 4 .. . .---,1 03 .....-.3r4,-- vr p\I •,1.4. :z., ., ' i\--,. „ --ii- -- - A •. _-_,. Ilr,Iss-:iir., ,,,; ,-.....' ,..e)1 7....,., L11‘3, -.fir- f rt .... s• ,,. • ,!; •i' •• .1 ,. -- _ ,N 71.„ .,-, ,,,.. •,,,,, .,---...... .rt .....----2:.\\\ . , ,, • 7,; ...-'.- -e-----'. .-' - ( i! f-N-- . .V ' •,_ ---- ' • : • - :i 1: 1.,LA ''•'--..'• '2--, .• '''';''- N eel— I ' N lit ........,4 • •• ; • " / ..,'.":"I' .4, t , ,0•,"'N-I'ci '...,:'''( \ --4,I. _J ..,- • / _ t,.,'A,-. N......___Th_.t.',.,i. •.•_'-''-' 1E )/,----• .,- .\ - 7,...)., ,:m7::,, vi:,:::_....17 --#---1 :1,-4-. ...11 •' - cr „r-----.. .0.4 - '". '.-b*1-• . . 11 • W 4,1 / • ibirok7,g.-..... =..„..... _ s ..,......0 . ...dw. AM 4( 1611.:- r- . , CO ' -co 0>.- „%017: 1 ...,, , If , u ,i. ,ct4h- :,"...;,‘,....--44._Xl •••,' kr,i , z . 4.-..— 4 ilr i„• 4 1 ' . 1 4 i i 1 - ..;) ri' • t ,,: . . ..&,. . • _ i.1f$:,1 4, . ' ,tv,100, 11`,,frj ti ...-...= -' • .. ../.....--,.. , (- -, !I Likx 106...--- '1'"..f ..-. --- •-•---,.* -dr - - . 4 / .....P W..V-4:" 1' .•'• •••.' ,../ ...• „ 'C " l.'„ rs.---„,• _____, _ ,, Ark-, . . . ) 11. f'-'-' , 1t„.„..._1"...1.17 ,,- V , :.---,,- 0 441. 3'kl- -----i.Fizsk,_____:Lv,---_----4' /fr....) ink, i • i \ . -....s. R * ----, , u A k__0 ......,4„. .18 ,. , .) -• 1: ',,,,,, -k,:`,....,,,,, \ \:), 4 it alik ,._ . i - t 1-1:•-• 1)&,,'• ‘ di•• ' 61., dr -• • N! __. .. - it,f4,,,.\,,,i, : . ri.,- . ,--; „,-L- --- , pi ,,k, ...• L....., A li--\411114k 4,. 12166.' - ' t /1_,_:-Th. • , t,=-- 0,-`1,1: f,', . . IL — ,2,. .... at ...ma krAriME., it ,lifEiViiirli,, A . .' ''''- k?, Pi E.2 V r 1 OCT 1 0 2018 C•1 V) V ,L) 4'i:—...--------, Mark Hargrove From: Johnson, Kelly <kelly.p.johnson@ncdenr.gov> Sent: Wednesday,August 22, 2018 11:03 AM To: Mark Hargrove Subject: FW:Alternative Design Question, Borrow Pit for Wet Pond (Oyster Landing Ph IV) Attachments: C-2.31 Drainage System.pdf; DWQCALCpond 082218.pdf Mark, We think this is reasonable. Please see below,and also include this email in your submittal so that the reviewer sees that this has already been worked out. Thanks, Kelly From:Johnson, Kelly Sent:Wednesday,August 22, 2018 10:39 AM To: Lewis,Linda<linda.lewis@ncdenr.gov>; Hall,Christine<Christine.Hall@ncdenr.gov>; Pusey,Steven <steven.pusev@ ncd e n r.gov> Cc:Georgette Scott<georgette.scott@ncdenr.eov> Subject:Alternative Design Question, Borrow Pit for Wet Pond (Oyster Landing Ph IV) What are your thoughts on this? There is an existing borrow pit that has an average depth of 12ft. Even when using an 8ft average depth its surface area is 30 times more than the required area. It is a huge pond. 1. Having a forebay 15-20%of the actual pond size seems a bit overboard. Do you all think it is reasonable to have 15-20%of the required (as opposed to provided) main pond volume in the forebay? 2. They want a "beach"on one side(-25%of the ponds perimeter)with a 10:1 non-vegetated shelf. Do you think it is reasonable to ask him to determine what the perimeter of the required volume/surface area would be,and to provide at least that length of vegetated shelf along the perimeter and allow a portion to be a 10:1"beach"? I feel like this is a reasonable approach. Thanks, Kelly flEGE!VE OCT111 1 02018 ts) From: Mark Hargrove mailto:mhargrove ec.rr.com Sent:Wednesday,August 22,2018 9:22 AM To:Johnson, Kelly<kellv.p.iohnson@ncdenr.gov> Subject: [External] Oyster Landing Ph IV-Borrow Pit for wet pond R.. s..l emwiil. Do nct or open dttachm-nentti L!nlL',S unrifled. Send all susplcrous email as an attachment to Repot t Sam. Kelly, 1 Attached is a pdf showing the proposed pond (converted borrow pit)for the next phase of development. Also attached is the first page of my pond calculations. The calculated average depth of the pond would be+/-12 ft even when I use a depth of 8 ft....the pond only needs a surface area of a little over 14,000 sf the surface area of the converted borrow pit at normal pool elevation is almost 423,000 sf that is 30 times what is needed. Do the forebays still need to equate to 15-20%of the permanent pool volume? One forebay has a surface area at normal pool of 35,800 sf and the other is almost 14,000 sf. The developer also wants to have a "beach"on side of the pond. The perimeter of the normal pool elevation is almost 3600 If....the beach side is+/-935 If....the slope along this portion would be 10:1 so that people and dogs could be able to play in the water if they wanted to without worrying about stepping off on a slope that is 3:1 I previously talked w/ Linda about this around a year ago and she didn't think it would be a problem since the pond was so large. Let me know what you think. Thanks Mark N. Hargrove, PE Port City Consulting Engineers, PLLC 910-599-1744 0 -- Virus-free. www.avast.com 2 Burd, Tina J To: e851isa@gmail.com; e85jack@gmail.com; mhargrove@ec.rr.com Subject: SW8 070653 - Oyster Landing Subdivision The Wilmington Regional Office of the Division of Energy, Mineral and Land Resources(Stormwater Section) has accepted the Stormwater Permit Application and $505.00 fee for the subject project on October 10,2018. The project has been assigned to Steve Pusey and you will be notified if additional information is needed. Please be advised that the construction of built-upon area may not commence until the Stormwater Permit is issued. Tina Burd Administrative Associate II Wilmington Regional Office Division of Environmental Assistance &Customer Service Phone 910-796-7215 NCDEQ Wilmington Regional Office 127 Cardinal Drive Ext. Wilmington, NC 28405 ,.:e to a u ,.; address is subject to the • ..'u,.i..,.. ,'.i:- ;7!' • may be Uis iosed to third parties:', 1 Operation & t Maintenance Agreement Project Name: Oyster Landing Phase IV 5Wg 0770 653 Project Location: NC HWY 172 - Sneads Ferry Cover Page Maintenance records shall be kept on the following BMP(s). This maintenance record shall 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 pollutant removal efficiency of the BMP(s). The BMP(s)on this project include(check all that apply&corresponding O&M tables will be added automatically): Bioretention Cell Quantity: Location(s): Dry Detention Basin Quantity: Location(s): Grassed Swale Quantity:, Location(s): Green Roof Quantity: Location(s): Infiltration Basin Quantity: Location(s): Infiltration Trench Quantity: Location(s): Level SpreaderNFS Quantity: Location(s): Permeable Pavement Quantity: Location(s): Proprietary System Quantity: Location(s): Rainwater Harvesting Quantity: Location(s): Sand Filter Quantity: Location(s): Stormwater Wetland Quantity: Location(s): Wet Detention Basin Quantity: 1 Location(s): Only pond on site Disconnected Impervious Area Present: No Location(s): User Defined BMP Present: No Location(s): I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to the system or responsible party. *Responsible Party: Lisa Beaman Title&Organization: Member-Hoosier Daddy, LLC Street address: 6025 Tarin Road City,state,zip: Wilmington,NC 28409 Phone number(s): 252-916-5030 Email: e85lisa@gmail.com 611/ Z -ea/ki/a/b(—) Signature: Date: q. I, MA-C Q , Gy1,lr5Ie ,a Notary Public for the State of C County of �u,Y.kT� ,do hearby certify that u5C1 r Lc5 e '4 41a 4 personally appeared before me this L- day of d .ep vv(Q and acknowledge the due execution of the Op r tions§_and aintena ce Agree ent. Witness my hand and official seal, rcErirlCCU10201 Seal My commission expires 06- ty 2 O STORM-EZ 8/30/2018 Version 1.4 O&M Manual Page 1 of 4 Wet Detention Pond Maintenance Requirements The wet detention basin system is defined as the wet detention basin,pretreatment including forebays and the vegetated filter if one is provided. 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: Potential problem: How I will remedlate the problem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the BMP Areas of bare soil and/or Regrade the soil if necessary to remove the gully,and then plant a erosive gullies have formed. 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 approximately six inches. long. The inlet device The pipe is clogged. 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 smooth it over and provide erosion swale. control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or Remove sediment and replace with clean stone. covered in sediment(if applicable). The forebay Sediment has accumulated to Search for the source of the sediment and remedy the problem if a depth greater than the possible. Remove the sediment and dispose of it in a location where it original design depth for will not cause impacts to streams or the BMP. sediment storage. 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 practices show that pruning is needed to maintain optimal plant health. Plants are dead,diseased or Determine the source of the problem: soils,hydrology,disease, etc. dying. 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 plants rather than spraying. ECEI E OCT 1 0 2018 Y: STORM-EZ 8/30/2018 Version 1.4 O&M Manual Page 2 of 4 Wet Detention Pond Maintenance Requirements(Continued The main treatment area Sediment has accumulated to Search for the source of the sediment and remedy the problem if a depth greater than the possible. Remove the sediment and dispose of it in a location where it original design sediment will not cause impacts to streams or the BMP. storage depth. Algal growth covers over 50% Consult a professional to remove and control the algal growth. of the area. Cattails, phragmites or other Remove the plants by wiping them with pesticide(do not spray). invasive plants cover 50%of the basin surface. The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or beaver Use traps to remove muskrats and consult a professional to remove activity is present. beavers. A tree has started to grow on Consult a dam safety specialist to remove the tree. the embankment. 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 Department of Environment and Natural damage have occurred at the Resources Regional Office. outlet. 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. rECE1VE I) OCT 1 0 2018 ev: STORM-EZ 8/30/2018 Version 1.4 O&M Manual Paae 3 of 4 et °tendoni Pond lgn Summary Wet Pond Diagram WET POND ID FOREBAY MAIN POND 1 Permanent Pool El. 45.5 Permanent Pool El. 45.5 Temporary Pool El: 45t Temporary Pool El: 45.8 Pretreatment other No Clean Out Depth: 5.5 Clean Out Depth: 15.5 than forebay? Sediment Removal El: 40 Sediment Removal El: 30 Has Veg.Filter? No Bottom Elevation: 39 Bottom Elevation: 29 CEIVE0 OCT 102018 4Y. STORM-EZ 8/30/2018 Version 1.4 O&M Manual Pane 4:If 2. OYSTER LANDING PHASE IV STORM WATER CALCULATIONS FOR NCDEQ SEPTEMBER, 2018 o1/$4,49 �O¢oFEss�o 4 SEAL 19742E. 9.. 4'aQINe�� Port City Consulting Engineers, PLLC �� ' 6216 Stonebridge Road Wilmington, North Carolina 28409 OCT 1 0 2018 (910) 599-1744 License # P-1032 AY. STORM WATER NARRATIVE OYSTER LANDING PHASE IV SNEADS FERRY, NC SEPTEMBER, 2018 The site is located on NC 172 approximately 1.5 miles east of US HWY 17. This project was previously permitted as a low density project on October 2, 2007 (SW8 070653) and a modification was approved on March 2, 2016 for Phase II and on March 13, 2017 for Phase III that used wet ponds to treat the runoff from the piped systems. The original project was designed as a low density subdivision with roadside swales. Phases II & Ill had curb & gutter and thus a wet pond to treat the storm water runoff. The roads for Phase IV will also have curb and gutter and storm water will be conveyed to a wet detention basin by culverts. The project will remain a "Low Density" project and the allowable BUA per lot will remain at 4,006 sf. The wet pond is an old borrow pit that will be converted to a wet detention pond. The converted borrow pit will be much larger than is required per the storm water regulations. The pond will be about 30 times larger than required. The pond will have a 6 ft wide vegetative shelf around 73% of the pond. The remaining edge of the pond will be used for a "beach" where the side slopes are 10:1 to allow for kids to play and be able to wade in the water without the fear of stepping off onto a steep side slope. The site drains to Stones Creek (SA; HQW) and Turkey Creek (SA; ORW). The project for this submittal will have five (5) drainage basins. The first two are the two areas that drain to Stones Creek (Drainage Area No. 1) and Turkey Creek (Drainage Area No. 2). Drainage Basin No. 3 is the area that drains to the wet pond for Phase II. Drainage Basin No. 4 is the area that drains to the wet pond for Phase III. Drainage Basin No. 5 is the area that drains to the'wet pond for Phase IV. The impervious area shown for Phases 11 & Ill is also included in the impervious area for Drainage Area No. 2. The impervious area for Ph IV is included in Drainage Areas No. 1 & No. 2. The impervious area proposed for the next phase of construction is shown in both Drainage Area No. 5. However, The pond for Phase IV of the project is located outside the "/s mile line of Turkey Creek and is located in Drainage Area No. 5. The subdivision is 319 acres and the allowable impervious area remains at 24.4% which equates to 3,390,536 sf of impervious area. Paved Areas = 371,000 sf Lot BUA = 985,476 sf Future Impervious Area = 2,037,305 sf 3,393,781 sf — 77.84 ac 77.84/319 = 24.4% The site meets the low density criteria for subdivisions. { Oyster Landing Pond - Phase IV Total Area Draining to Pond= 1,873,846 SF = 43.02 AC Total Proposed Impervious Surface Area Draining to Pond: 88 Lots @ 4,006/lot = 352,528 sf Pavement - 119,510 sf Clubhouse Pavement - 10,030 sf Clubhouse Bldg = 1,000 sf Clubhouse Sidewalk = 1,010 sf Clubhouse Pool Concrete = 4,010 sf Future Impervious Area = 250,000 sf 738,088 sf -r 16.94 ac % Impervious draining to pond = 738,088/1,873,846 - 33.39% Required Storage for 1.5-Inch of Runoff For Pond: (use Schueler Method) = 0.05 + 0.009 (I) = 0.05 + 0.009(39.39) = 0.405 (1.5")(0.405)(1/12)(1,873,846) = 94,746 cf (135,716 cf provided @ elevation 45.80) POND DEPTH SA/DA% POND SURFACE AREA (MIN.) (FT) (SF) 8.0 0.73 13,679 11.01 Calculated If Avg Pond Depth = 8.0 ft, minimum surface area = 13,679 sf Used Coastal chart to size pond Area @ elevation 45.50 = 429,937 SF > 13,679 sf Required storage for forebay: Note: pond is so large compared to what is required, forebays are impractical to size for 20% of the permanent pool volume. The surface areas of the two forebays combined are larger than what the pond size is required in surface 1 area. Pond Volume Contour Incremental Cumulative Elevation Area Volume Volume (ft) (sf) (cf) (cf) Bottom Elevation 30.00 161,729 0 0 34.00 182,863 689,184 689,184 35.00 290,869 236,866 926,050 38.00 323,801 922,005 1,848,055 40.00 346,100 669,901 2,517,956 41.00 363,181 354,641 2,872,597 42.00 380,313 371,747 3,244,344 43.00 397,716 389,015 3,633,358 44.00 415,166 406,441 4,039,799 44.50 423,791 209,739 4,249,538 Permanent Pool 45.50 429,937 426,864 4,676,402 Forebay 7 Volume Contour Incremental Cumulative Elevation Area Volume Volume (ft) (sf) (cf) (c) Bottom Elevation 40.00 4,970 0 0 41.00 5,902 5,436 5,436 42.00 6,904 6,403 11,839 43.00 7,973 7,439 19,278 44.00 9,110 8,542 27,819 44.50 9,703 4,703 32,522 Permanent Pool 45.50 10,942 10,323 42,845 Note: The pond was so large compared to the required size, the forebays could not be size for 20%of the permament pool volume. The forebays shown are almost as large as the required pond. The forebays don't fit any design criteria but are large enough to function for the large pond. Forebay 2 Volume Contour Incremental Cumulative Elevation Area Volume Volume (ft) (sf) (cf) (of) Bottom Elevation 40.00 3,786 0 0 41.00 4,892 4,339 4,339 42.00 6,069 5,481 9,820 43.00 7,319 6,694 16,514 44.00 8,641 7,980 24,494 44.50 9,329 4,493 28,986 Permanent Pool 45.50 10,759 10,044 39,030 Contour Incremental Cumulative Elevation Area Volume Volume (ft) (sf) (cf) (cf) Normal Pool 45.50 451,638 0 0 1.5"Storage Level 45.80 453,137 135,716 135,716 (F7) (CF) (CF) (CFS) (HOURS) 45.80 135,716 135,716 _ 0.531 70.9 45.50 0 TOTAL HOURS 70.9 DAYS 3.0 CONTROL PIPE : 8 INCH ORIFICE HOLE USED ORIFICE EQUATION TO DETERMINE OUTFLOW RATE Q = Cd*A*(2gh)"1/2 [ t 1 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2016 by Autodesk,Inc.v10.5 Saturday,09/8/2018 Hyd. No. 1 Post Development Site Drainage Hydrograph type = SCS Runoff Peak discharge = 174.76 cfs Storm frequency = 10 yrs Time to peak = 730 min Time interval = 2 min Hyd. volume = 717,458 cuft Drainage area = 43.020 ac Curve number = 81.000* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 15.0 min Total precip. = 6.90 in Distribution = Type Ill Storm duration = 24 hrs Shape factor =484 *Composite(Area/CN)=[(16.940 x 98)+(26.080 x 70)]/43.020 Hydrograph Discharge Table (Printed values x 40.00%of Qp.) Time -- Outflow (min cfs) 716 71.37 718 81.60 720 96.00 722 114.43 724 134.94 726 154.26 728 168.61 730 174.76 732 172.43 734 164.28 736 153.09 73R 140.45 740 126.62 742 112.35 744 98.85 746 87.47 748 78.42 750 70.77 2 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2016 by Autodesk,Inc.v10.5 Saturday,09/8/2018 Hyd. No. 2 Pond Routing Hydrograph type = Reservoir Peak discharge = 6.161 cfs Storm frequency = 10 yrs Time to peak = 1006 min Time interval = 2 min Hyd. volume = 481,623 cuft Inflow hyd. No. = 1 - Post Developmentagme = Pond Max. Elevation = 46.65 ft Max. Storage = 558,411 cuft Storage Indication method used. Hydrograph Discharge Table (Printed values>=40.00%ofQp.) Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 826 15.45 46.55 28.30 1.417 --- --- 1.068 --- ---- 2.485 828 15.24 46.55 28.30 1.420 --- 1.142 ---- ----- -- 2.562 830 15.04 46.55 28.30 1.423 1.214 ---- ---- 2.637 832 14.84 46.55 28.30 1.426 --- ---- 1.284 2.710 834 14.63 46.56 28.30 1.429 ---- --- 1.353 ---- ---- ---- 2.782 836 14.43 46.56 28.30 1.432 1.420 ---- ----- 2.851 838 14.22 46.56 28.30 1.434 ---- 1.485 ---- ---- ---- 2.920 840 14.02 46.57 28.30 1.437 1.549 --- --- --- --- 2.986 842 13.82 46.57 28.30 1.440 --- 1.612 ---- --- --- 3.051 844 13.62 46.57 28.30 1.442 --- 1.673 ---- ---- --- 3.115 846 13.43 46.57 28.30 1.445 ---- 1.732 --- 3.177 848 13.25 46.58 28.30 1.447 ---- 1.790 ---- ---- 3.237 850 13.09 46.58 28.30 1.449 ---- ---- 1.847 ---- ---- 3.297 852 12.94 46.58 28.30 1.452 ---- ---- 1.903 -- ---- 3.354 854 12.80 46.58 28.30 1.454 ---- 1.957 --- --- 3.411 856 12.68 46.58 28.30 1.456 --- 2.010 -- 3.467 858 12.57 46.59 28.30 1.459 -- 2.062 --- -- --- --- 3.521 860 12.46 46.59 28.30 1.461 ---- 2.114 ---- ---- ---- --- 3.575 862 12.36 46.59 28.30 1.463 ---- 2.164 ---- - 3.627 864 12.26 46.59 28.30 1.465 --- 2.214 ---- 3.679 Continues on next page... 3 Pond Routing Hydrograph Discharge Table Time inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 866 12.16 46.60 28.30 1.467 2.263 --- --- -- 3.730 868 12.06 46.60 28.30 1.469 --- 2.311 ---- ---- 3.779 870 11.97 46.60 28.30 1.471 --- 2.358 -- ---- ---- 3.828 872 11.87 46.60 28.30 1.473 ---- 2.431 -- --- ---- ---- 3.903 874 11.77 46.60 28.30 1.474 ----- 2.513 ----- --- 3.988 876 11.67 46.61 28.30 1.476 2.594 ---- ----- 4.070 878 11.58 46.61 28.30 1.478 2.672 --- ---- 4.150 880 11.48 46.61 28.30 1.480 ---- 2.749 ---- 4.229 882 11.38 46.61 28.30 1.481 -- 2.824 --- ---- ---- 4.305 884 11.28 46.61 28.30 1.483 --- 2.898 -- --- --- 4.380 886 11.18 46.61 28.30 1.484 -- 2.969 --- ---- --- 4.453 888 11.08 46.62 28.30 1.486 --- 3.039 ---- -- ---- 4.524 890 10.99 46.62 28.30 1.487 3.106 ---- ---- 4.594 892 10.89 46.62 28.30 1.489 ----- 3.173 --_ ---- ---- 4.661 894 10.79 46.62 28.30 1.490 ---- 3.237 ---- 4.727 896 10.69 46.62 28.30 1.491 ---- 3.300 ---- ---- 4.791 898 10.59 46.62 28.30 1.493 --- --- 3.361 -- --- 4.853 900 10.49 46.62 28.30 1.494 --- ---- 3.420 ---- ---- ---- 4.914 902 10.39 46.63 28.30 1.495 --- ---- 3.477 ---- --- 4.973 904 10.29 46.63 28.30 1.496 3.533 --- --- ----- 5.030 906 10.19 46.63 28.30 1.498 3.588 5.085 908 10.10 46.63 28.30 1.499 ---- ---- 3.640 ---- --- ---- 5.139 910 9.996 46.63 28.30 1.500 3.692 --- ----- 5.191 912 9.897 46.63 28.30 1.501 ---- 3.741 ---- 5.242 914 9.797 46.63 28.30 1.502 ---- 3.789 --- - ---- ---- 5.291 916 9.697 46.63 28.30 1.503 ---- 3.836 --- ---- ---- 5.338 918 9.598 46.63 28.30 1.504 ---- ---- 3.880 ---- --- ---- 5.384 920 9.498 46.64 28.30 1.505 ---- 3.924 --- ---- 5.429 Continues on next page... 4 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 922 9.398 46.64 28.30 1.506 ---- 3.966 ---- --- ---- 5.471 924 9.298 46.64 28.30 1.507 ---- 4.006 ---- 5.513 926 9.198 46.64 28.30 1.507 ---- -- 4.045 ---- ---- 5.552 928 9.098 46.64 28.30 1.508 ---- 4.082 ---- ---- ---- ---- 5.591 930 8.998 46.64 28.30 1.509 ---- 4.119 ---- ---- --- --- 5.628 932 8.898 46.64 28.30 1.510 ---- 4.153 ---- ---- --- ---- 5.663 934 8.798 46.64 28.30 1.510 ---- 4.186 ---- ---- 5.697 936 8.697 46.64 28.30 1.511 ---- 4.218 --- -- --- 5.729 938 8.597 46.64 28.30 1.512 ---- 4.249 ---- 5.760 940 8.497 46.64 28.30 1.512 --- ---- 4.278 ---- ---- 5.790 942 8.396 46.64 28.30 1.513 ---- 4.305 ---- ---- 5.818 944 8.296 46.65 28.30 1.514 ---- 4.332 ---- ---- 5.845 946 8.195 46.65 28.30 1.514 4.357 ---- ----- 5.871 948 8.095 46.65 28.30 1.515 --- 4.380 -- --- ---- 5.895 950 7.994 46.65 28.30 1.515 --- 4.403 -- --- ---- 5.918 952 7.893 46.65 28,30 1.515 ---- 4.424 --- --- --- 5.939 954 7.792 46.65 28.30 1.516 ---- 4.444 ---- ---- ---- 5.960 956 7.691 46.65 28.30 1.516 ---- 4.462 --- 5.979 958 7.590 46.65 28.30 1.517 --- ---- 4.480 5.996 960 7.489 46.65 28.30 1.517 ---- 4.496 --- 6.013 962 7.389 46.65 28.30 1.517 ---- ---- 4.511 ---- --- 6.028 964 7.292 46.65 28.30 1.518 4.524 ---- ---- ---- 6.042 966 7.199 46.65 28.30 1.518 -- 4.537 - ---- --- 6.055 968 7.112 46.65 28.30 1.518 4.548 ---- --- --- ---- 6.066 970 7.033 46.65 28.30 1.518 4.559 ----- 6.077 972 6.962 46.65 28.30 1.519 ----- 4.568 --- ---- 6.087 974 6.899 46.65 28.30 1.519 --- 4.577 --_- 6.096 976 6.842 46.65 28.30 1.519 ---- 4.585 ---- --- 6.104 Continues on next page... 5 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfll Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 978 6.789 46.65 28.30 1.519 ---- ---- 4.593 ---- ---- 6.112 980 6.741 46.65 28.30 1.519 ---- 4.599 ---- ---- 6.119 982 6.695 46.65 28.30 1.519 ---- 4.606 ---- ---- ---- 6.125 984 6.651 46.65 28.30 1.520 ---- 4.611 --- ---- 6.131 986 6.607 46.65 28.30 1.520 ---- 4.617 --- ---- ---- --- 6.136 988 6.563 46.65 28.30 1.520 4.621 ---- ----- -- 6.141 990 6.520 46.65 28.30 1.520 -- 4.625 --- ---- ---- 6.145 992 6.476 46.65 28.30 1.520 --- ---- 4.629 --- ---- 6.149 994 6.432 46.65 28.30 1.520 ----- 4.632 6.152 996 6.389 46.65 28.30 1.520 •-- 4.635 ---- --- 6.155 998 6.345 46.65 28.30 1.520 --- ---- 4.637 ---- 6.157 1000 6.301 46.65 28.30 1.520 ---- --- 4.639 ---- ---- ---- 6.159 1002 6.257 46.65 28.30 1.520 --- ----- 4.640 ---- ---- 6.160 1004 6.214 46.65 28.30 1.520 --- 4.641 --- --- ---- 6.161 1006 6.170 46.65<< 28.30 1.520 ---- -- 4.641 --- --- 6.161 « 1008 6.126 46.65 28.30 1.520 --- 4.641 -- ---- ---- 6.161 1010 6.082 46.65 28.30 1.520 --- 4.640 --- --- ---- 6.161 1012 6.038 46.65 28.30 1.520 4.639 ---- 6.160 1014 5.994 46.65 28.30 1.520 --- 4.638 --- 6.158 1016 5.951 46.65 28.30 1.520 ---- ---- 4.636 6.156 1018 5.907 46.65 28.30 1.520 ---- --- 4.634 --- ---- ---- 6.154 1020 5.863 46.65 28.30 1.520 --- --- 4.631 --- -- 6.151 1022 5.819 46.65 28.30 1.520 ---- 4.628 ---- -- ----- 6.147 1024 5.775 46.65 28.30 1.520 --- 4.624 --- ---- --- 6.144 1026 5.731 46.65 28.30 1.520 ---- ---- 4.620 --- 6.140 1028 5.687 46.65 28.30 1.520 ---- --- 4.615 ---- ---- 6.135 1030 5.643 46.65 28.30 1.519 4.610 ---- 6.130 Continues on next page... 6 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1032 5.599 46.65 28.30 1.519 ---- 4.605 ---- ----- ---- 6.125 1034 5.555 46.65 28.30 1.519 ---- 4.600 --- ---- -- -- 6.119 1036 5.511 46.65 28.30 1.519 ---- 4.593 --- ---- ---- --- 6.113 1038 5.467 46.65 28.30 1.519 ---- 4.587 ---- 6.106 1040 5.423 46.65 28.30 1.519 ---- 4.580 ---- - ---- 6.099 1042 5.379 46.65 28.30 1.519 ---- 4.573 6.091 1044 5.335 46.65 28.30 1.519 ---- ---- 4.565 ---- ---- 6.084 1046 5.290 46.65 28.30 1.518 ---- ---- 4.557 --- 6.075 1048 5.246 46.65 28.30 1.518 -- 4.549 ---- --- 6.067 1050 5.202 46.65 28.30 1.518 ----- --- 4.540 - ---- ---- -- 6.058 1052 5.158 46.65 28.30 1.518 --- --- 4.531 --- ---- --- 6.048 1054 5.114 46.65 28.30 1.518 --- --- 4.521 --- 6.039 1056 5.070 46.65 28.30 1.517 -- 4.511 ---- 6.029 1058 5.026 46.65 28.30 1.517 ---- 4.501 ---- 6.018 1060 4.981 46.65 28.30 1.517 4.491 ---- ---- --- 6.007 1062 4.937 46.65 28.30 1.517 ---- 4.480 --- ---- 5.996 1064 4.893 46.65 28.30 1.516 ---- 4.468 --- ---- --- ---- 5.985 1066 4.849 46.65 28.30 1.516 ---- 4.457 ---- ---- --- 5.973 1068 4.804 46.65 28.30 1.516 ---- 4.445 --- --- ---- ---- 5.961 1070 4.760 46.65 28.30 1.516 -- 4.432 --- --- --- ---- 5.948 1072 4.716 46.65 28.30 1.515 4.420 ---- ---- 5.935 1074 4.671 46.65 28.30 1.515 ---- ---- 4.407 ---- ---- 5.922 1076 4.627 46.65 28.30 1.515 ---- 4.394 -- 5.909 1078 4.583 46.65 28.30 1.515 4.380 ---- ---- 5.895 1080 4.539 46.65 28.30 1.514 -- 4.366 ---- 5.880 1082 4.495 46.65 28.30 1.514 4.352 --- --- --- --- 5.866 1084 4.452 46.65 28.30 1.514 ---- 4.338 ---- --- ---- ----- 5.851 1086 4.412 46.64 28.30 1.513 4.323 ---- ---- ---- 5.836 Continues on next page... 7 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1088 4.375 46.64 28.30 1.513 ---- ---- 4.308 ----- 5.821 1090 4.343 46.64 28.30 1.513 ---- ----- 4.292 ----- 5.805 1092 4.315 46.64 28.30 1.512 ---- 4.277 ---- 5.789 1094 4.291 46.64 28.30 1.512 4.262 --- ---- 5.774 1096 4.271 46.64 28.30 1.512 4.246 ---- ---- ---- -- 5.758 1098 4.253 46.64 28.30 1.511 --- 4.230 --- ---- ---- 5.742 1100 4.237 46.64 28.30 1.511 4.215 ---- ----- 5.726 1102 4.223 46.64 28.30 1.511 ---- ---- 4.199 --- - 5.710 1104 4.209 46.64 28.30 1.510 --- 4.184 5.694 1106 4.196 46.64 28.30 1.510 4.168 ---- 5.678 1108 4.183 46.64 28.30 1.510 ---- 4.153 ---- --- 5.662 1110 4.170 46.64 28.30 1.509 ---- 4.137 ---- ---- 5.646 1112 4.157 46.64 28.30 1.509 4.122 ---- ---- ---- --- 5.631 1114 4.144 46.64 28.30 1.509 --- 4.106 --- -- 5.615 1116 4.131 46.64 28.30 1.508 4.091 ---- --- 5.599 1118 4.118 46.64 28.30 1.508 ---- -- 4.076 - ---- ---- 5.583 1120 4.104 46.64 28.30 1.508 ---- ---- 4.060 5.568 1122 4.091 46.64 28.30 1.507 ---- 4.045 ---- 5.552 1124 4.078 46.64 28.30 1.507 ---- 4.030 --- 5.537 1126 4.065 46.64 28.30 1.507 ---- ---- 4.014 5.521 1128 4.052 46.64 28.30 1.506 --- ---- 3.999 ---- ---- 5.505 1130 4.039 46.64 28.30 1.506 --- --- 3.984 ---- --- 5.490 1132 4.025 46.64 28.30 1.506 ---- --- 3.969 ---- --- ---- 5.474 1134 4.012 46.64 28.30 1.505 ---- 3.953 ---- ---- ---- 5.459 1136 3.999 46.64 28.30 1.505 ---- ---- 3.938 ---- 5.443 1138 3.986 46.64 28.30 1.505 ---- 3.923 ---- ---- 5.428 1140 3.973 46.64 28.30 1.504 3.908 ---- ---- 5.412 1142 3.960 46.64 28.30 1.504 ---- ---- 3.893 5.397 Continues on next page... 8 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D EMI Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1144 3.946 46.63 28.30 1.504 ---- 3.878 --- --- 5.382 1146 3.933 46.63 28.30 1.503 ---- --- 3.863 --- ---- 5.366 1148 3.920 46.63 28.30 1.503 ---- --- 3.848 ---- ---- 5.351 1150 3.907 46.63 28.30 1.503 3.833 -- ---- --- -- 5.336 1152 3.894 46.63 28.30 1.502 3.818 ---- ---- _---- 5.320 1154 3.881 46.63 28.30 1.502 ---- 3.803 ---- ---- 5.305 1156 3.867 46.63 28.30 1.502 -- 3.788 --- 5.290 1158 3.854 46.63 28.30 1.502 3.773 ---- 5.275 1160 3.841 46.63 28.30 1.501 ---- ---- 3.758 ---- 5.260 1162 3.828 46.63 28.30 1.501 --- ---- 3.744 ---- -- 5.244 1164 3.815 46.63 28.30 1.501 ---- ----- 3.729 ---- ---- 5.229 1166 3.801 46.63 28.30 1.500 --- ---- 3.714 ---- --- ---- 5.214 1168 3.788 46.63 28.30 1.500 ----- 3.699 ---- 5.199 1170 3.775 46.63 28.30 1.500 3.684 --- ---- 5.184 1172 3.762 46.63 28.30 1.499 3.670 ---- 5.169 1174 3.748 46.63 28.30 1.499 ---- 3.655 ---- ---- ---- 5.154 1176 3.735 46.63 28.30 1.499 -- 3.640 ---- --- ---- 5.139 1178 3.722 46.63 28.30 1.498 3.625 ----- -- --- 5.124 1180 3.709 46.63 28.30 1.498 --- 3.611 ---- -- 5.109 1182 3.696 46.63 28.30 1.498 ---- 3.596 ---- ---- --- 5.094 1 184 3.682 46.63 28.30 1.497 ---- 3.581 ---- 5.079 1186 3.669 46.63 28.30 1.497 3.567 ---- ---- --- 5.064 1188 3.656 46.63 28.30 1.497 3.552 ---- 5.049 1190 3.643 46.63 28.30 1.496 ---- ---- 3.538 5.034 1192 3.629 46.63 28.30 1.496 ---- ---- 3.523 -- --- 5.019 1194 3.616 46.63 28.30 1.496 --- 3.508 ---- 5.004 1196 3.603 46.63 28.30 1.496 ---- ---- 3.494 ____ --- 4.989 1198 3.590 46.63 28.30 1.495 ---- 3.479 --- ---- 4.975 Continues on next page... 9 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1200 3.576 46.63 28.30 1.495 ---- 3.465 ---- 4.960 1202 3.563 46.62 28.30 1.495 --- 3.450 ---- _-- ---- 4.945 1204 3.550 46.62 28.30 1.494 ---- 3.436 ---- 4.930 1206 3.537 46.62 28.30 1.494 3.421 --- 4.916 1208 3.523 46.62 28.30 1.494 ---- 3.407 4.901 1210 3.510 46.62 28.30 1.493 ---- 3.393 --- --- ---- ---- 4.886 1212 3.497 46.62 28.30 1.493 3.378 -- --- ---- ---- 4.871 1214 3.484 46.62 28.30 1.493 ---- 3.364 --- 4.857 1216 3.470 46.62 28.30 1.492 --- 3.350 --- --- 4.842 1218 3.457 46.62 28.30 1.492 3.335 --- ---- 4.827 1220 3.444 46.62 28.30 1.492 ---- 3.321 --- 4.813 1222 3.430 46.62 28.30 1.492 ---- 3.306 --- ---- ---- ---- 4.798 1224 3.417 46.62 28.30 1.491 ----- 3.292 ---- --- --- --- 4.783 1226 3.404 46.62 28.30 1.491 -- 3.278 --- --- ---- 4.769 1228 3.391 46.62 28.30 1.491 --- 3.263 -- --- 4.754 1230 3.377 46.62 28.30 1.490 --- ---- 3.249 ---- ---- ---- 4.740 1232 3.364 46.62 28.30 1.490 ---- 3.235 ---- __-_ -___ 4.725 1234 3.351 46.62 28.30 1.490 --- 3.221 ---- ----- ----- 4.710 1236 3.337 46.62 28.30 1.489 ----- 3.206 ---- ---- ---- 4.696 1238 3.324 46.62 28.30 1.489 - ---- 3.192 ---- --- 4.681 1240 3.311 46.62 28.30 1.489 3.178 ---- --- 4.667 1242 3.298 46.62 28.30 1.488 --- 3.164 --- ---- --- ---- 4.652 1244 3.284 46.62 28.30 1.488 ---- 3.150 ---- --- --- 4.638 1246 3.271 46.62 28.30 1.488 ---- 3.135 ---- ---- ---- ---- 4.623 1248 3.258 46.62 28.30 1.488 3.121 ---- 4.609 1250 3.244 46.62 28.30 1.487 ---- 3.107 ---- ----- ---- 4.594 1252 3.231 46.62 28.30 1.487 --- ---- 3.093 ---- 4.580 1254 3.218 46.62 28.30 1.487 ---- 3.079 ---- 4.566 Continues on next page... 10 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1256 3.204 46.62 28.30 1.486 ---- --- 3.065 ---- ---- ---- 4.551 1258 3.191 46.62 28.30 1.486 ---- --- 3.051 --- 4.537 1260 3.178 46.62 28.30 1.486 ---- 3.037 ---- -- ---- 4.522 1262 3.164 46.62 28.30 1.485 ---- 3.022 --- ---- --- 4.508 1264 3.151 46.61 28.30 1.485 ---- 3.008 ---- ---- 4.494 1266 3.138 46.61 28.30 1.485 2.994 ---- 4.479 1268 3.124 46.61 28.30 1.485 ---- ---- 2.980 ---- ---- 4.465 1270 3.111 46.61 28.30 1.484 ---- 2.966 ----- 4.450 1272 3.098 46.61 28.30 1.484 --- 2.952 ---- --- 4.436 1274 3.084 46.61 28.30 1.484 --- --- 2.938 --- -- ---- 4.422 1276 3.071 46.61 28.30 1.483 ---- 2.924 --- --- 4.408 1278 3.058 46.61 28.30 1.483 ---- --- 2.910 ---- ---- --- 4.393 1280 3.044 46.61 28.30 1.483 ---- 2.896 ---- 4.379 1282 3.031 46.61 28.30 1.482 --- 2.882 ---- ---- 4.365 1284 3.018 46.61 28.30 1.482 --- 2.868 ---- --- 4.350 1286 3.004 46.61 28.30 1.482 2.854 --- ---- ---- ---- 4.336 1288 2.991 46.61 28.30 1.482 ---- 2.840 ---- --- --- -- 4.322 1290 2.977 46.61 28.30 1.481 2.826 --- --- ---- 4.308 1292 2.964 46.61 28.30 1.481 -- 2.813 ---- ---- ----. 4.293 1294 2.951 46.61 28.30 1.481 -- 2.798 --- ---- 4.279 1296 2.937 46.61 28.30 1.480 2.785 ---- ---- ---- 4.265 1298 2.924 46.61 28.30 1.480 --- ---- 2.771 ---- 4.251 1300 2.911 46.61 28.30 1.480 ---- 2.757 --- ---- 4.237 1302 2.897 46.61 28.30 1.479 ---- 2.743 ---- 4.222 1304 2.884 46.61 28.30 1.479 ---- 2.729 ---- --- --- --- 4.208 1306 2.870 46.61 28.30 1.479 ---- 2.715 -- ---- ---- ---- 4.194 1308 2.857 46.61 28.30 1.479 --- 2.701 ---- ---- --_- 4.180 1310 2.844 46.61 28.30 1.478 2.687 --- --- 4.166 Continues on next page... 11 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1312 2.830 46.61 28.30 1.478 2.674 ---- ---- 4.152 1314 2.817 46.61 28.30 1.478 2.660 ---- ---- 4.137 1316 2.804 46.61 28.30 1.477 ---- 2.646 4.123 1318 2.790 46.61 28.30 1.477 ---- --- 2.632 ---- 4.109 1320 2.777 46.61 28.30 1.477 ---- 2.618 ----- 4.095 1322 2.957 46.61 28.30 1.476 --- ---- 2.606 ---- --- --- 4.082 1324 3.143 46.61 28.30 1.476 ---- ---- 2.595 --- ---- -- 4.071 1326 3.336 46.60 28.30 1.476 ---- -- 2.586 ----- ---- 4.062 1328 3.536 46.60 28.30 1.476 ---- 2.580 ---- ---- 4.056 1330 3.742 46.60 28.30 1.476 ---- 2.575 ----- ---- --- 4.051 1332 3.641 46.60 28.30 1.476 ---- 2.572 ---- 4.047 1334 3.536 46.60 28.30 1.476 --- ---- 2.567 ---- ---- 4.042 1336 3.428 46.60 28.30 1.476 ---- 2.561 --- 4.036 1338 3.316 46.60 28.30 1.475 --- 2.554 ---- ---- -- 4.029 1340 3.200 46.60 28.30 1.475 --- 2.546 --- --- --- 4.021 1342 3.081 46.60 28.30 1.475 2.537 - ---- ---- ---- 4.012 1344 2.958 46.60 28.30 1.475 --- 2.526 --- ---- ----- 4.001 1346 2.831 46.60 28.30 1.475 ---- 2.515 ---- --- ---- 3.989 1348 2.821 46.60 28.30 1.474 --- 2.503 ---- ---- ---- 3.977 1350 2.811 46.60 28.30 1.474 2.491 ---- ---- 3.965 1352 2.801 46.60 28.30 1.474 ---- 2.479 --- --- --- --- 3.952 1354 2.791 46.60 28.30 1.473 2.466 -- ---- --- 3.940 1356 2.781 46.60 28.30 1.473 --- 2.455 ---- --- -- --- 3.928 1358 2.771 46.60 28.30 1.473 ---- 2.443 -- --- ---- --- 3.915 1360 2.761 46.60 28.30 1.473 --- 2.431 ---- 3.903 1362 2.751 46.60 28.30 1.472 2.419 --- --- 3.891 1364 2.741 46.60 28.30 1.472 2.407 ---- 3.879 1366 2.731 46.60 28.30 1.472 2.395 ---- 3.867 Continues on next page... 12 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1368 2.721 46.60 28.30 1.472 ---- ---- 2.383 -- -- ---- 3.855 1370 2.711 46.60 28.30 1.471 ---- 2.371 ----- ---- ----- 3.843 1372 2.701 46.60 28.30 1.471 --- -- 2.365 ----- ---- -- 3.836 1374 2.691 46.60 28.30 1.471 ---- 2.358 ---- --- ---- 3.829 1376 2.681 46.60 28.30 1.471 --- 2.352 _-_ ____ 3.822 1378 2.671 46.60 28.30 1.470 ---- 2.345 ---- ----- ---- 3.815 1380 2.661 46.60 28.30 1.470 --- 2.338 --- ---- 3.809 1382 2.651 46.60 28.30 1.470 ---- ---- 2.332 --- ---- 3.802 1384 2.641 46.60 28.30 1.470 ---- --- 2.325 ---- -- --- 3.795 1386 2.631 46.60 28.30 1.469 --- 2.319 ---- --- ---- - 3.788 1388 2.620 46.60 28.30 1.469 --- 2.312 --- ----- --- --- 3.781 1390 2.610 46.60 28.30 1.469 ---- 2.305 ---- ---- --- --- 3.774 1392 2.600 46.60 28.30 1.468 ---- 2.299 ---- ---- 3.767 1394 2.590 46.60 28.30 1.468 ---- 2.292 3.760 1396 2.580 46.60 28.30 1.468 ---- ---- 2.285 --- 3.753 1398 2.570 46.60 28.30 1.468 ---- ---- 2.279 --- --- ---- 3.746 1400 2.560 46.60 28.30 1.467 --- 2.272 --- --- ---- -- 3.739 1402 2.550 46.60 28.30 1.467 2.265 --- --- --- 3.732 1404 2.540 46.60 28.30 1.467 ---- --- 2.258 ---- --- ---- 3.725 1406 2.530 46.59 28.30 1.466 2.252 ---_ -_- 3.718 1408 2.520 46.59 28.30 1.466 2.245 --- ---- 3.711 1410 2.510 46.59 28.30 1.466 ---- 2.238 ---- 3.704 1412 2.500 46.59 28.30 1.466 ---- ---•-- 2.231 ---- 3.697 1414 2.490 46.59 28.30 1.465 2.224 ---- 3.689 1416 2.480 46.59 28.30 1.465 ---- ---- 2.217 ---- --- 3.682 1418 2.470 46.59 28.30 1.465 ---- 2.210 -- 3.675 1420 2.460 46.59 28.30 1.464 ---- 2.203 --- --- _--- 3.668 1422 2.449 46.59 28.30 1.464 ---- 2.197 ---- --- 3.661 Continues on next page... 13 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1424 2.439 46.59 28.30 1.464 --- 2.190 --- ---- 3.653 1426 2.429 46.59 28.30 1.464 ---- 2.183 --- 3.646 1428 2.419 46.59 28.30 1.463 2.176 --- --- ---- 3.639 1430 2.409 46.59 28.30 1.463 -- 2.169 ---- 3.632 1432 2.399 46.59 28.30 1.463 2.162 ---- •---- ---- 3.624 1434 2.389 46.59 28.30 1.462 --- 2.155 --- ---- --- ---- 3.617 1436 2.379 46.59 28.30 1.462 --- 2.147 ----- -- ----- --- 3.610 1438 2.369 46.59 28.30 1.462 2.140 -- ----- 3.602 1440 2.359 46.59 28.30 1.461 --- 2.133 --- ----- ----- 3.595 1442 2.278 46.59 28.30 1.461 ---- 2.126 ---- --- 3.587 1444 2.127 46.59 28.30 1.461 2.118 ---- ---- ---- 3.579 1446 1.905 46.59 28.30 1.460 -- 2.109 --- ---- 3.570 1448 1.614 46.59 28.30 1.460 2.099 ---- ---- --- ---- 3.559 1450 1.254 46.59 28.30 1.460 --- 2.087 --- ---- ---- ---- 3.546 1452 0.939 46.59 28.30 1.459 ---- 2.073 ---- ---- ----- 3.532 1454 0.670 46.59 28.30 1.458 ---- 2.057 ---- ---- --- 3.515 1456 0.446 46.59 28.30 1.458 ---- --- 2.040 ---- 3.498 1458 0.267 46.59 28.30 1.457 --- ---- 2.022 ---- ----- 3.479 1460 0.133 46.58 28.30 1.456 ---- 2.004 ---- ---- 3.460 1462 0.044 46.58 28.30 1.455 ---- 1.984 ---- 3.440 1464 0.000 46.58 28.30 1.454 --- ---- 1.965 ---- ---- 3.419 1466 0.000 46.58 28.30 1.454 ---- --- 1.945 -- ---- --- 3.399 1468 0.000 46.58 28.30 1.453 ---- --- 1.926 ---- ---- 3.379 1470 0.000 46.58 28.30 1.452 ---- 1.907 ---- --- ---- 3.359 1472 0.000 46.58 28.30 1.451 ---- 1.887 --- ---- 3.339 1474 0.000 46.58 28.30 1.450 ---- 1.868 ---- ---- 3.319 1476 0.000 46.58 28.30 1.450 ---- 1.849 3.299 1478 0.000 46.58 28.30 1.449 ---- 1.831 ---- ---- ---- 3.279 Continues on next page... 14 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfll Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1480 0.000 46.58 28.30 1.448 --- 1.812 -- ---- ---- ----- 3.260 1482 0.000 46.58 28.30 1.447 --- 1.793 ---- ---- --- 3.240 1484 0.000 46.57 28.30 1.446 ---- 1.775 -- --- --- 3.221 1486 0.000 46.57 28.30 1.446 ---- 1.756 --- ---- 3.202 1488 0.000 46.57 28.30 1.445 ---- 1.738 ---- ---- 3.183 1490 0.000 46.57 28.30 1.444 ---- 1.720 ---- ---- ---- 3.164 1492 0.000 46.57 28.30 1.443 --- 1.702 3.145 1494 0.000 46.57 28.30 1.443 --- 1.684 --- 3.126 1496 0.000 46.57 28.30 1.442 ---- ---- 1.666 ---- 3.108 1498 0.000 46.57 28.30 1.441 --- ---- 1.648 -- 3.089 1500 0.000 46.57 28.30 1.440 --- 1.630 ----- -- --- 3.071 1502 0.000 46.57 28.30 1.440 --- -- 1.613 ---- --- 3.053 1504 0.000 46.57 28.30 1.439 ---- ---- 1.595 ---- 3.034 1506 0.000 46.57 28.30 1.438 1.578 ---- ---- --- 3.016 1508 0.000 46.57 28.30 1.438 ---- 1.561 --- ---- 2.998 1510 0.000 46.57 28.30 1.437 --- 1.544 --- ---- 2.981 1512 0.000 46.56 28.30 1.436 --- 1.527 --- ---- ---- 2.963 1514 0.000 46.56 28.30 1.435 --- 1.510 ---- -- ---- 2.945 1516 0.000 46.56 28.30 1.435 1.493 --- --- - 2.928 1518 0.000 46.56 28.30 1.434 1.476 --- -- ---- 2.910 1520 0.000 46.56 28.30 1.433 ----- ---- 1.460 --- 2.893 1522 0.000 46.56 28.30 1.433 --- ---- 1.443 ---- ---- 2.876 1524 0.000 46.56 28.30 1.432 1.427 ---•- 2.859 1526 0.000 46.56 28.30 1.431 ---- 1.410 ---- ---- 2.842 1528 0.000 46.56 28.30 1.431 --- 1.394 --- ---- --- --- 2.825 1530 0.000 46.56 28.30 1.430 ---- 1.378 --- ---- ---- 2.808 1532 0.000 46.56 28.30 1.429 ---- 1.362 ----- 2.791 1534 0.000 46.56 28.30 1.429 -- 1.346 --- ----- ---- ---- 2.775 Continues on next page... ' 15 Pond Routing Hydrograph Discharge Table Time Inflow Elevation Clv A Clv B Clv C PfRsr Wr A Wr B Wr C Wr D Exfil Outflow (min) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 1536 0.000 46.56 28.30 1.428 --- 1.330 ---- ----- --- 2.758 1538 0.000 46.56 28.30 1.427 --- 1.314 ---- ---- ---- 2.742 1540 0.000 46.55 28.30 1.427 ----- 1.299 ---- --- ---- 2.725 1542 0.000 46.55 28.30 1.426 ---- --- 1.283 ---- --- ---- 2.709 1544 0.000 46.55 28.30 1.425 ---- 1.268 ---- 2.693 1546 0.000 46.55 28.30 1.425 ---- 1.252 ---- ---- 2.677 1548 0.000 46.55 28.30 1.424 ---- 1.237 2.661 1550 0.000 46.55 28.30 1.423 ---- 1.222 2.645 1552 0.000 46.55 28.30 1.423 1.207 --- ---- 2.629 1554 0.000 46.55 28.30 1.422 -- 1.192 ---- ---- ---- 2.614 1556 0.000 46.55 28.30 1.421 ---- 1.177 ---- ---- ---- ---- 2.598 1558 0.000 46.55 28.30 1.421 --- 1.162 ---- ---- ---- 2.583 1560 0.000 46.55 28.30 1.420 1.147 ---- 2.567 1562 0.000 46.55 28.30 1.420 --- 1.132 --- 2.552 1564 0.000 46.55 28.30 1.419 1.118 --- --- 2.537 1566 0.000 46.55 28.30 1.418 ---- 1.103 ---- ---- -_-- 2.522 1568 0.000 46.55 28.30 1.418 --- 1.089 --- ---- ---- ---- 2.507 1570 0.000 46.55 28.30 1.417 --- 1.075 ---- --- 2.492 1572 0.000 46.54 28.30 1.417 ---- 1.060 ---- -- --- 2.477 ...End Pond Report 16 Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2016 by Autodesk,Inc.v10.5 Saturday,09/8/2018 Pond No. 1 - Pond Pond Data Contours-User-defined contour areas.Average end area method used for volume calculation.Begining Elevation=45.50 ft Stage/Storage Table Stage(ft) Elevation(ft) Contour area(sqft) Incr.Storage(cuft) Total storage(cuft) 0.00 45.50 451,638 0 0 0.50 46.00 486,041 234,420 234,420 1.50 47.00 507,271 496,656 731,076 2.50 48.00 528,566 517,919 1,248,994 3.50 49.00 550,058 539,312 1,788,306 Culvert/Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] CD] Rise(in) = 24.00 8.00 0.00 0.00 Crest Len(ft) = 25.00 30.00 0.00 0.00 Span(in) = 24.00 8.00 0.00 0.00 Crest El.(ft) = 46.50 48.00 0.00 0.00 No.Barrels = 1 1 0 0 Weir Coeff. = 3.00 3.00 3.33 3.33 Invert El.(ft) = 41.00 45.50 0.00 0.00 Weir Type = Broad Broad - - Length(ft) = 122.00 0.00 0.00 0.00 Multi-Stage = Yes No No No Slope(%) = 2.21 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfll.(Inlhr) = 0.000(by Contour) Multi-Stage = n/a Yes No No TW Elev.(ft) 0.00 Note:Culvert/Orifice outflows are analyzed under Inlet(Ic)and outlet(oc)control.Weir risers checked for orifice conditions(Ic)and submergence(a). Stage(ft) Stage/Discharge Elev(ft) 4.00 49.50 i 3.00 I 48.50 2.00 47.50 1.00 46.50 0.00 -- 45.50 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0 120.0 130.0 Total Q Discharge(cfs) w o r ' a g m C CD -0 0 r N CO) a t0 tO 1- CO CO 0 r N CO J N N N N CO D i 2 0_� dO a; nI 60_ a n. n. D a (d_ D_ a O. d a 0. a 0_ tb E. S (� N R. r ti O r A CD 1+ 1•) M CO W N r aD M to N 0) 0) v O N U) A tt7 O N (D (D O W O U) O V: N 0) W 12. CO r co N N Cr) CO CO CO' M CO V V' V CO CO V' CO Cr) V' CO3 U) CO 0 tD t0 to CO CD CD CO CD CO CD CO CO CD to CO t0 0 03 to m re co 0 O N. t- CD A0 A U) t0 ti M M nD W N C") cip 0) M C _ 0 o 0) 0 V: CO N tO N to r r N to t0 O O) O r It) O V• D C G O dp T r (n N N C7 CO Vi C) 6 Cr) V V' V' co co V co ri d IX 0 0 $ o O to t0 co co co CO co co t0 co CD to (D CD (Co (O CD CD CD CO V' Cl) V' N N CO W CO A 0 1- M CO CO CO r r CV N. r N co0. to ACDD CD co. to C CO O co V' CO tD F) to to Cs ID CD��'' • If) a IC)) U)) U0) LC) Ill IL) C to to 0000 CO CO CD (0 CCD 0CN0 a) to W W C..) CO V. U) CO CO O) W 0 O A CD U) to to C') V 0 CO U) N O tt) U) CO O N v- W U) W O) r l0 0) r M C- 03 0 N tt) $' el g 4 to 6 147 U) O U tD to 47 4) to to to U) CD CD CO tO CO CD CD CO V 0) V CO CO CO N N- CO N U) to N CO T. 0 N t0 CO 0 CO m CO CO V' T.: O V W CO A CO 0) r et r Nt W V �: 1 N co cc V. tt C) LC) IL) 10 SO I() t00 IOC) tC0) u0) t0C) t) t) 0 t) UO) ) If) U) > ,g y to .o t. O 0 N O till P. O V'N W (N U) t10_ N) rO N. ar D N V f� O E 0ee t7 tU) i) IL CO, C) 0 uL) 2 D tt) 8 It) 8 U)) to U)) t) UM) IC) IC) z a Cs N- 0 0 Co r 0 0 o r 0 0 0 0 0 0 0 0 0 0 0 0 O e N r O O O O o O 0 U) U) V) M 07 C7 Ch M COC7 C) 0) M Ch M CO C+) CIC) C) V) N O O O O O O O O o O O o o 0 y a1D) con ton coO co) 0)) c CO c)) C07 Ca) M 0r M N CV CV VT N CV N N N CO °D C r .- Fri ... U)) coM co co O) W CO r CO CO CO Cam) 0 CO 000 CO 0) 00) 0 N CON CO co tD 6 Co 07 C't) r't) 4 4 6 M N N 4 t9 t7 N C7 N N N N N CM7 a CD 0V CD CO C'CO 111 M�). V: U) 9 n tD V: M V: C� 4 V: N N C'- , V' co r tD CD co N N tV N 0 N N N N N N N N N U) U) II 0.2 D W CO V' co M CO N N N N N O. ✓ 0- W CO U) N CO C�) CO r N r 0 = V: W O) O) N M CO V V CD N U) CO W CD N CO 0 0 m CO V' Cr) N CV r o Co CV t:V CV CO. V; W N 0 N N It fQ., N CV N N N N N N r r V' r r .- W W CD N C� V' V' m C t N coM coC7 V' V' tO CD h CO CO 0) W W 0 r N M V' n to r to 11 2 o U) U) id tD U) 66 6 6 Co CO co CD 6 CD tD N C C0 C7 N W U) W N co N CO O) U) r C7 A M tD V. CD Cp O A E N N N CV N N W co tO CO CV N. N- N: to U) U) V co CV r o N } ✓ n 0 0 0 0 0, O O a o o a 0 0 O. 0 0 0 O 0 0 0 a I- d = 0 0 0 o o o o o 0 0 o o 0 0 0 a 0 o 0 0 o o c C E 6 Q C To Co in tt) r 1` 0) 1` LC) M N CD A V' V' r 1- CO CO M W CO co cc? U) N O W N 'IIC) N A V' r O O U) t0 O O O U) U) G C U 1 U) 4 4 4 4 6 M co co co O N N N No o o 0 x I. O 0 Co 0 CO U) r r N tD N V' C7 0 0 O CO O CO to CO Cr) q ■� O I- N N 0 0 r r 0 .6O r O r O N O O r 0 N R 4 C o o O o 0 0 0 o O 0 O 0 0 o O O o 0 o Co o K '5 O O O O o o O 0 O o o O o 0 o O o O CC• oY NI- 0 o 0 0 0 0 0 0 O O 0 0 0 0 0 0 o O O 0 0 0 as CO Cp �p a w O 6r3 W N U) V: 4 W m P. O^ 2 tD 8 2 C7 N N In O W N F I'l co O D r I- v r .- r0 O W W W Co N- I- r U) V• V' V' M co N N N r O to i�m+ a N t W W 0 CO CA W r N r 0) U) V' r N 0 U) 0 CO 0 N CO W 1- U) E V C) O N CG V; N r N M N r O r C7 O N O U) O M 0 U) O 0../ �� Q C (� o co o o o O O 0 O O 0 0 0 0 O o o O 0 o ci O U) C W COD 0V 00 CO o N C0*) C07 2 O O O N S U2I O C00 O O N t00 tg C as _ V- O CO W tD NI CO co. CD 3 W N ti V• I-, o O ul n Co cc? I• yC Ci) CCpp O CD r rA C 10 0 M W M CD N if-) 6) O 1� 3 .z` J CD tp N W r d V' O A N A CA N 0 L E ili m c C O 0 N CO V' iD CO N. co 0) 0 ii: C O o J Ui r N M V' U) co N co 0) N M C) 6 C d O O CO :cr. C r 0 r N CO V' U) CD 0- to CO 0 r CV N CO V' t0 CO A to OfCV N N Q. Z I 1 N $ al I] co C6 a. 0 m E C d' O co N. CO CD 0 r N O v If) CD N. CO 0 0 r N Col v j N N N N N N M C? C? C? NC? C7 C) Ch C"I I I v v w ri. d d d d d d d a d 1i a_ d ri. a. a n. n. a O. 1i co 0 }. r O N 1` N (') CO CO N O LC) 0 0 0 m N CO C) LC) O C') CC N sr. N Cl O O N N C') r r O in 0) CO CO O 0 ID O 0 LI a $ C) C) C7 of c') cr) C') co 0 0 O) 6i CO C) co co co N 0 0 N CA CO CD (0 (0 CD CO CD CD CD IC) O U) CO CO CO CD CO 0 CD CO CDai C) tY 0 ▪ O N. O Vol Cr) CO CO 0 N CO O 0 0 CO CO CO CC) C) C D _ N CC) N 0 0 0 O N O C) r r N. N 0) 01 0 0 0 O 0 = C;• 0 $ CD (O CO CCOO CO CD CO CO in O If) ID CO CD CO (D CD (0 CO CD CD 0) O 0) CO v r N. CO CO sr CO C) CD N 0) d' r IA V In O C') r CO N C) N C') N coC') CA N C7 N N CD a? 1+ O' V COO 10 tIL) CD CO CO CO CO 110 CC) 10 CD co (00 I4j 110 COO 10 1.0 A 111 O N n O co CO co CO CA r N T Sr C) CO CO CO v N a J Co 0) r N N Cr) N. CO r CO r N N r d N Of N- O C C) N- 0) r N r co O CO CO CO M co co O o O O O) 't' c 4 CD CO ID CO CO CD CO CO O O O O O CO CO (0 In O ID O O co v In -or N- N Sr Sr '0' 0 N N. N N N 0 O ID N N 0) r.. Cn O) N. C') C") r.- 0 10 CO etIn O co co r N Cr) 0) CO CO CO 10 = O. e 0) N- C) 0 o O) r- ti d' IC) O CO 0 0 0 O 10 co CO (D CD O O co In co O O CC) O 10 If) O CO CD CO O O O O O O d YJ 0 t+ .3 0 Cr) 0 0 CO 0 0 O 0 CC) 0 O N N CD O N N N E m r 0 co to r 0 .; (D 1D 0) r r !D 01 C�'1) CO C') = EO If to CO 10 ID In 10 ID 10 In 10 10 10 CO CO CD 10 In (D 10 Z a 0) 0 0 O 0 0 0 0 10 0) CD 0 0 0) 0 0 0) 0 0 CD N O N IN C) 0) 0 0 in co coCA co on N 07 ls) N C') M N 0 N e O s r o r r 0 O O O O O O O O O 0 O O o r m O. y 10 In In O on If) WIIn CO CO O 10 10 10 10 LC) CO CO 10 0 0a .h S. Cl) ✓ n 0) r N. co co N• N co r 0) IC) CD . CD CO CD N. N 0 N _ et I _ N- q O N ti (D N- O "I N. C') N: N r d Ni v 10 N r N N N r O N N r r r 0._ .4 .4' CO N CO CD IOC) N c(DD_ coO, v co I 102 0- Od. IOn CO) (0 N. co``) v co 'N. V V C') co (D CO CO (0 v II) co N. CO CO v co C) (+) O O (() CC) CO II G a ^ O N- CO O . U) C) N O v C') a In 0 v .N Ps N CD COO, co C N. 0) CO N: v r st C') N CD O N C- O rcc 1 t) N r r o r N N r In sr N s- O N r 0 v sr N r r m I C tC) M ID If) O O O P) O N N O O O v N N 0 N �' O O 4_ v C COr+ ri r-: N. P..: N- N- I,: N- r.: W o r-: N: r... N: r.- V • a+ C 0 co 0 co (D O N O co cc co r co co O co ot N E ' a o a 0 0 o O r .- 0 O O 0 u0) coN r O O 0 } C.) 0 ^ co co co co O O O O O 0 O 0la F 97 C O O O O O o 0 o O o 0 o o I(C O O O 0 0 O O o .g c E ) (C O i If) U) If) r `m #; n E IS m CO v 0 O 0) t7 CO (ri N. COO 0 r 0) 0 0) 0) r m = ++ C') N N r r N N N- N r COr N 0 N. Cn N N r C Li U F o o O o O O O o O O o O O O o o O O O O O LL CO V CD v O 0) 0) CO CO 0) r N. CD 0 0 r 0) s- r CO r CO . •II1M d O O N N r r N r r o N N r O N O r r O N r RQ e o o O o O o o O O o O o o O o o o O o o O o 0p 0 0 0 0 0 0 :;:r' o a o 0 0 o m m O o o 'ar 1 = O Cv (O y' v v q el• V: V; v V O CO CD :; ' v g 4 N ^ a0 o 0 0 0 0 0 0 o a o 0 0 0 o 0 0 o 0 0 0 0 GS ID O CO r O CO N CM sr Ch r CD r In v v O O N` (h N CO v '� CO CO N et N. CO v CO (D co V; N 07 N r N: Sr N- O v N 03 (... E O O O O O 0 O O r r O O O O O O r r O O O C;i m r C N Q CA CO CO O CO N 0) 't N�C N O r CC) 0 st O CO CO r N CO (N G Cj a CO (D N N0 N C') sf CV to CD it N O N r N N N In v O 3n O S. y o O o O o O O O O o 0 o O 0 O o 0 O O 0 0 ITOI O + S o 0 0 p0 0 0 0 0 0 a o 0 O o 0 0 0 0 Qa W CD E O O O N O O N CO N If)) COS'). CD O N m I) co O C) {D 8 g 11 J ..' N N N CO') N N COO Cam') m la N (0 coN N 110 orfo N co N N O N N U C m f N N O N. O CO CD N N C') CO CO CO O r 0 'y'� _ O e I-.o.3 N N. r r r N r N r C') 07 C') CO N C') C') r C') ^� et ifi F v _ O IQ CO 1 CO N N co N N CO CO M C0 COO C') CO') C') C') CO3 CO 0 q' Sr 07 PT 0 - Z to ci a i 0 k S § k G@ 0 0 ; Cl. a � & a a a co k $ § m I •0. £ @ k a . $ M E B k \ Co Co B 0 ii e 0 V _ 0 g 0 § 0 g 0 § c c o $ 2 k o § $ G S G S G § In 9 @ p R • £ co » CO ■ co $ ■ 2 - 0- - Co 2 e F- ) 0 £ § 4 4 ¢ ¢ ■ § rs 2 § 2 % CO k @ B > • E $ ■ ■ U $ $ , { tu co o - G 7 $ Co (0 k k o E. .0 # $ . » ■ Z A q q o § § 0 2 0 0 0 Cr)_,0 0 E co co co to 0 _ 10 O. k k g § el CO N 0 $ } C ¥ - W - x a $ § g q q G � . f) t to to o » co a n .0 o. Is- § S. § k CO $ CO - q II t I-fie a P.: N- F- w - w PC . - t - Z- 2 2 ci 2 ci 0 o \ o k co G to 2 J 0 2 ■ o i to £ o o 0 o 0 0 0 c E a ID d a � I t a E % % % q Co V. m a C Q I- 0 0 0 0 0 o 0 o 0 0 N- Co a CO 0 l I k o 2 0 0 0 0 0 o %% 0 0 0 0 0 0 / ■ S k 0 0 0 d o 0 0 + 2 2 - f % U- 0 q k ® r- 3 w w w o 0 0 2 a 6 _ § § g 9 4 k q 2 a t a 0 0 0 0 0 0 0 0 41) % § / 2 A E 7 7 CO 5 j « a § k § • E k 0§ £ 01 n n CD e 8 . ' 0 Cl) & § - 04 Ca .0- 10 CO I, O. Z rco Cl a t6 a e c I) c g vCOVWI9itOtnCO d 9 a a0.- 0- a 0- cLn. da. c 0 N EN10 10 CO co� cO.t eQ�t to Co Q al r r r[1 it Oco to co in to coto a a in in to ui E co�_ 0 SI O N0 N CD cc! cc! N tf) to C V C ^ O of O o) a co O W o) W IZ' Vt o . O 0 co to In o co in to o 01 M C)) N Ccc V' V' CDD M CD CD V' 1a to to Co)) in tl N. in ai 10 to m W .J a- t� O CO M 0)) (V (D CO m co _ $ 4 O 1n O cc a co cc; cr a <n a O �pp ici .0- O1, Vim' CO `Cr N n Co Or C ? Q a to K to to in co to tin to — co co 2 II) 0 N- 2V' to 107 10.- ti O C CD COO E g G e w 2 2 IWn 2 2 2 2 to z O 0 0 n V. to 0 0 CD sf V; t') t') to to. O O cv O co O O 0 m o. co co to to in to in co to 0 F. RI c w .r 7) u) m v Of er- c0Q M h To a o CO sr Co .- .- v' 1') 0 0 Cl _O co 1p, tq co r O ttoo too in r!1 u ea V 3 v N Or an V' CO O ' co t', .C1 �p _ g O a `i N O ib M th CWO, .- N cc II m Cli Or to � — r V' V' r O ✓ U C t N c'I co. CD N N V' V' CV N II ♦e cr.. V co W co c i co co co t10 W co 0 O ri •c CD V v Cr) 0 O r 0 C7 0 r y E ti ti m co 1ri IO t` I: tci a sci II o ii 1- m ?▪ 0 0 0 0 0 0 0 0 0 0 13 E O O tci CI) tci 10 10 CL) 1ti a c at Co c N N co COI) e0- If) 4 O 4- - O O O O O O o O CC • V x t7 O co co " - Or CO 0 O •0 ` V 0 `V Q C O O co O O O O O O O = O m S 8 V; v c v v v v C) CV a6 O diO C7 CD 0 C C 0 I Ci E r ma r4 N + R OD I_ O O U) � c) M I) N 01 N 2 E i_'_ n e 2 v C+i C7 e- e- O O r r O O m 2 Lo Q C to • C) O O W It) N- I,- 1D co W 'CI C V O co O 1-- CO. CO t"1 N CD CO N C r ai$ y c ra o 0 0 0 0 0 0 0 0 o 0 co M/ 0o CO W N 10 TY COCC) N N � 0 0 Co Cl) _ N Co N It) co V; to 10 1- CO > A , -I ' CO N- N M1 CoO C0O N co ID C) A. m .cm. C i-..� cm r N to N n CO CO -6 W O 0 m y = Af O 2 coa C e- N co V• tO (O 1� CO W r O. 2 1 OYSTER LANDING - PHASE IV Velocity Control: Culvert# P-1 Q,oyr =28.11 cfs (See provided calculations) Culvert size = 36 inch Velocity = 6.56 fps New York DOT Dissipater Method For Use in Defined Channels: Zone 2 For 36 inch culvert Upstream Width = 9.0 ft Downstream Width = 12.0 ft Length = 9.0 ft Depth = 18 in 126 SF CLASS B RIPRAP PROVIDED 8" Reuse Line from Pluris Qioyr =0.91 cfs (pipe flowing 90% full) { Pipe size = 8 inch V = QIA A = 0.35sf V = (0.91 cfs/0.35 sf) Velocity = 2.61 fps New York DOT Dissipater Method For Use in Defined Channels: Zone 1 For 8 inch pipe Upstream Width = 3.0 ft Downstream Width = 4.0 ft Length = 4.0 ft Depth = 18 in 14 SF CLASS B RIPRAP PROVIDED 1 9 Culvert# P-55 Q 10yr =7.27 cfs (See provided calculations) Culvert size = 18 inch Velocity = 4.92 fps New York DOT Dissipater Method For Use in Defined Channels: Zone 1 For 18 inch culvert Upstream Width = 4.5 ft Downstream Width = 6.0 ft Length = 6.0 ft Depth = 18 in 32 SF CLASS B RIPRAP PROVIDED Culvert# P45 Q 10yr =9.96 cfs (See provided calculations) Culvert size = 18 inch Velocity = 6.51 fps New York DOT Dissipater Method For Use in Defined Channels: Zone 1 For 18 inch culvert Upstream Width = 4.5 ft Downstream Width 6.0 ft Length = 6.0 ft Depth = 18 in 32 SF CLASS B RIPRAP PROVIDED 2 Wet Pond Outlet Q10 rr = 6.16 cfs (See provided calculations) Culvert size — 24 inch V = Q/A A = 3.14 sic V = (6.16 cfs/3.14 sf) Velocity = 1.96 fps New York DOT Dissipater Method For Use in Defined Channels: Zone 2 For 24 inch culvert Upstream Width = 6.0 ft Downstream Width = 8.0 ft Length = 6.0 ft Depth = 18 in 88 SF CLASS B RIPRAP PROVIDED ci 3 1 PORT CITY CONSULTING ENGINEERS, PLLC d 2 OF TRAMMilyilm, 6216 STONEBRIDGE ROAD DATE 9/10/18 JOB NO. WILMINGTON, NORTH CAROLINA, ATTENTION 28409 PHONE# (910)599-1744 RE: Oyster Landing Subdivision Phase IV Storm Water Permit SW8 070653 TO: Georgette Scott Low Density Project with a Wet Pond NCDWQ Storm Water Permit Modification 127 Cardinal Drive ► ECEIv .',, � '1 Wilmington, NC 28405 :_ f J wr "0 = - - WE ARE SENDING YOU ®Attached El Under separate cover the following Yams: ❑ Shop Drawings ❑ Prints El Plans ❑ Samples p ❑Specifications ❑ Copy of Letter 0 Change order 0 Diskette ❑ Permit Forms COPIES DATE NO. DESCRIPTION One Original & one copy of: Stormwater Management Application, Wet Pond Supplement, & Wet Detention 2 Basin Operation & Maintenance Agreement 2 Storm Water Narrative & Calculations Copies of Plans (Cover, C-1, C-2.1, C-2.2, C-2.3, C-2.4, C- 2.5, C-2.6, C-2.7, C-3.1, C-3.2, C-3.3, C-5.0, C-5.1, C-5.2 & 2 C-5.3) 1 Check for$505 for application fee 1 Quad Sheet showing Phan f -E114 THESE ARE TRANSMITTED as checked below: OCT 1 0 2018 ❑ co• = ,for ® For approval El Approved as submitted Resubmit appr`val 1 I i✓f/ ❑ For your use 0 Approved as noted copies ford ❑Submit distributionn 0 As requested ❑ Returned for corrections 0 Return corrected prints " ❑ For review and comment ❑ ')(__/417, — 0" "`' 0 FOR BIDS DUE 20 ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: This is a modification to the existing permit. This will still be a low density permit with the drainage going to a wet pond via storm culverts for impervious area that drains to the roads. COPY TO: File SIGNED: if enclosures are not as noted,kindly notify us at once. 00556 c-&T DEMLR USE ONLY Date Re ived Fee Paid Permit Number 10 1041? $II& 4'505.0o Svcs 076653 Applicable Rule . Coastal SW-1995 ❑Coastal SW-2008 0 Ph II-Post Construction (select all that apply) ❑Non-Coastal SW-HQW/ORW Waters 0 Universal Stormwater Management Plan ❑Other WQ Mgmt Plan: State of North Carolina i_" EIVE Department of Environment and Natural Resources OCT 1 0 2018 I) 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.): Oyster Landing Subdivision 2. Location of Project(street address): NC 172&SR 1518 City:Sneads Ferry County:Onslow Zip: 28460 3. Directions to project(from nearest major intersection): US HWY 17&NC 172,turn right on NC 172 and go 1.35 miles. Turn right onto Oyster Landing Drive 4. Latitude:34°32'19"N Longitude:77°28'39"W of the main entrance to the project. II. PERMIT INFORMATION: 1.a.Specify whether project is(check one): ['New ®Modification ❑Renewal w/ Modificationt }Renewals with modifications also requires SWLI--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 SW8 070653 Mod ,its issue date(if known)March 13,2017 ,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): ❑LAMA Major Sedimentation/Erosion Control: 55 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 DYes If yes,see S.L.2012-200,Part VI:http://portal.ncdenr.org/web/lr/rules-and-regulations Form SWU-101 Version Oct.31,2013 Pagc 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:Hoosier Daddy,LLC Signing Official&Title:Lisa Beaman-Member Hoosier Daddy,LLC b.Contact information for person listed in item la above: Street Address:6025 Tarin Road City:Wilmington State:NC Zip:28409 Mailing Address(if applicable): City: State: Zip: Phone: (910 ) 769-3053 Fax: ( Email: e851isa@gmail.com c.Please check the appropriate box.The applicant listed above is: El 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: CE"1 Signing Official&Title: 11t b.Contact information for person listed in item 2a above: Street Address: ® -' City: State: Zip: Mailing Address(if applicable): City: 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:lack Carlisle Signing Official&Title:Member Hoosier Daddy,LLC b.Contact information for person listed in item 3a above: Mailing Address:6025 Tarin Raod City:Wilmington State:NC Zip:28409 Phone: (910 ) 818-7078 Fax: ( ) Email:e85jack@gmail.com 4. Local jurisdiction for building permits: Onslow County Point of Contact:George Lacey Phone#: (910 ) 989-3072 Form SWU-101 Version Oct.31,2013 Page 2 of 6 IV. PROJECT INFORMATION OCT 1 0 2018 1. In the space provided below,briefly summarize how the stormwater runoff will be treate --- Stormwater for Phase IV that drains into the road will be treated in a wet detention pond sized to handle 90%TSS 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:319 acres 5. Total Coastal Wetlands Area: acres 6. Total Surface Water Area: acres 7. Total Property Area(4)-Total Coastal Wetlands Area(5)-Total Surface Water Area(6) =Total Project Area+:319 acres + Total project area shall be calculated to exclude the following: the normal pool of impounded structures,the area between the banks of streams and rivers,the area below the Normal High Water(NH14)line or Mean High Water (MHW)line,and coastal wetlands landward from the NHW(or MHW)line. The resultant project area is used to calculate overall percent built upon area(BUA). Non-coastal wetlands landward of the NHW(or MHW)line may be included in the total project area. 8. Project percent of impervious area: (Total Impervious Area/Total Project Area)X 100 =24.4 % 9. How many drainage areas does the project have?4 (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. SAS (ft 5. 5,A 8 Basin Information Drainage Area 1 Drainage Area Z Drainage Area 3 Drainage Area 4 Receiving Stream Name Stones Creek Turkey Creek Turkey Creek Turkey Creek Stream Class * SA;HQW SA;ORW SA;ORW SA;ORW Stream Index Number* 19-30-3 18-87-1 18-87-1 18-87-1 Total Drainage Area(sf) 2,976,086 10,932,854 496,427 559,977 On-site Drainage Area(sf) 2,976,086 10,932,854 496,427 559,977 Off-site Drainage Area(sf) 0 Proposed Impervious Area**(sf) 726,165 2,667,616 172,433 220,848 %Impervious Area"(total) 24.4 24.4 34.73 39.44 Impervious'Surface Area Drainae Area 1 Drainage Area 2 Drainage Area 3 Drainage Area 4 On-site Buildings/Lots(sf) 111103,462 677,014 114,171 137,206 On-site Streets (sf) 111,000 260,000 51,763 77,797 On-site Parking (sf) 0 0 On-site Sidewalks (sf) 0 Other on-site (sf) 0 16,050 Future(sf) 306,703 1,714,552 6,499 5,845 Off-site (sf) Existing BUA***(sf) Total (sf): 726,165 2,667,616 172,433 220,848 * Stream Class and Index Number can be determined at: http//portal.ncdenr.org/web/wq/ps/csu/classifications ** Impervious area is defined as the built upon area including,but not limited to,buildings,roads,parking areas, sidewalks,.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 BUA. Form SWU-101 Version Oct.31,2013 Page 3 of 6 Basin Information Drainage Area 5 Receiving Stream Name Turkey Creek rE"41111 Stream Class* SA;ORW Stream Index Number* 18-87-1 1 0 201 Total Drainage Area(sf) 1,873,846 On-site Drainage Area (sf) 1,873,846 Off-site Drainage Area (sf) 0 Proposed Impervious Area ** (sf) 688,088 %Impervious Area ** (sf) 36.72% Impervious**Surface Area Drainage Area 5 On-site Buildings/Lots(sf) 353,528 On-site Streets(sf) 119,510 On-site Parking(sf) 10,030 On-site Sidewalks(sf) 1,010 Other on-site(sf) 4,010 • Future(sf) 200,000 Off-site(sf) Existing BUA*** (sf) Total sf): 688,088 11. How was the off-site impervious area listed above determined?Provide documentation. Proiects in Union County:Contact DEMLR Central Office staff to check if the project is located t llrl Endangered Species watershed that may be subject to more stringent stormwater requirements asp 5A N 1 O U 1)0 V. SUPPLEMENT AND O&M FORMS (�J,j� The applicable state stormwater management permit supplement and operation and mainteince(O&M)forms must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded from http://portal.ncdenr.org/web/wq/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://portal.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 nttp://portal.ncdenr.org/web/wq/ws/su/statesw/forms_docs. Initials — 1. Original and one copy of the Stormwater Management Permit Application Form. 2. Original and one copy of the signed and notarized Deed Restrictions&Protective Covenants Form. (if required as per Part VII below) 3. Original of the applicable Supplement Form(s) (sealed,signed and dated) and O&M ,NI)T} agreement(s)for each BMP. 4. Permit application processing fee of$505 payable to NCDENR. (For an Express review,refer to M101) http://www.envhelp.org/pages/onestopexpress.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/managementfor t l the project. This is required in addition to the brief summary provided in the Project Information,item 1. 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the yho receiving stream drains to class SA waters within i mile of the site boundary,include the i 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: Yh1V 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. 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. it 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). Form SWU-101 Version Oct.31,2013 Page 4 of 6 p. Vegetated buffers(where required).9. Copy of any applicable soils report with the associated SHWT elevations(Please identify /I,//1' 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:4139 Page No: 72-79 MV O- 11. For corporations and limited liability corporations(LLC):Provide documentation from the NC AI* Secretary of State or other official documentation,which supports the titles and positions held by the persons listed in Contact Information,item la,2a,and/or 3a per 15A NCAC _ . IE V E The corporation or LLC must be listed as an active corporation in good standing wi • Secretary of State,otherwise the application will be returned. http://www.secretary.state.nc.us/Corporations/CSearch.aspx OCT 1 O 2018 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 http://portal.ncdenr.org/web/lr/state-stormwater- forms docs.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:Mark N.Hargrove,PE Consulting Firm: Port City Consulting Engineers,PLLC Mailing Address:6216 Stonebridge Road City:Wilmington State:NC Zip:28409 Phone: (910 ) 599-1744 Fax: ( Email:mhargrove@ec.rr.com DC. 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) ,certify 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) with(print or type name of organization listed in Contact Information,item la) 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 comple •• Name/Ownership Change Form within 30 days;otherwise I will be op- - ; a stormwater treatment facility wi sut a valid permit. I understand that the operation of a stormwa . -atment facility without a valid permit i : violation of NC General Statue 143-215.1 and may res - i appropriate enforcement action including the "..sessm ivil penalties of up to$25,000 per day,p . :•ant to NCGS 143-215.6. Signature: Apr ow �1i A Date: to MA gre �� ► - Notary - i c for the State of ,County of do hereby certify that ���\- ama ✓ �� _ -V personally appeared before me this day of ./ ,PAt'.a a. :% I . a owledge e due -xecution o e ap. ' . ron r a stormwater permit. Witness my ha and official seal, 4,J/, i - SEAL r.r•* My commission expires � Lt► Y Zd)Z'd ECE1VE OCT 1 0 2018 X. APPLICANT'S CERTIFICATION I,(print or type name of person listed in Contact Information,item la) Lisa Beaman 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 sto ater les ceder NCAC 2H.1000 and any other applicable state stormwater requirements. Signature: - - - — - _ Date:-- - 4.0 I, I"y l•CAL Qi ,a N tary Public for the State of 1 ) ,County of IC do hereby certify that personally appeared before me this day of and ac owled the xecu ' of pp ' atio for a stormwater permit. Witness my hand and official seal, SEAL My commission expires )C ly W zA Form SWU-101 Version Oct.31,2013 Page 6 of 6 Pusey, Steven From: Mark Hargrove <mhargrove@ec.rr.com> Sent: Wednesday,October 04, 2017 9:37 AM To: Pusey, Steven Cc: 'Lisa Beaman'; e85iack@gmail.com Subject: [External] RE: [External] Oyster Landing - SW8 070653 If CAUTION:This email originated from outside of the organization.Do not click links or open attachments unless you verify that the I.attachment and content are safe. Send all suspicious email as an attachment to report.span@nc,gov. Ok....thanks....will get you a certification for Phase I Mark N. Hargrove, PE Port City Consulting Engineers, PLLC 910-599-1744 From: Pusey, Steven [mailto:steven.pusey@ncdenr.gov] Sent: Wednesday, October 04, 2017 9:20 AM To: Mark Hargrove Cc: Lisa Beaman; e85jack@gmail.com Subject: RE: [External] Oyster Landing - SW8 070653 Mark, For low density permits, a certification has been required since at least the 1995 Rules. Here is an excerpt from a 1995 Rules permit: "Within 30 days of completion of the project,the permittee must certify in writing that the project's stormwater controls,and impervious surfaces have been constructed within substantial intent of the approved plans and specifications.Any deviation from the approved plans must be noted on the Certification!' In 2008,we added: "The permittee shall submit the Certification to the Division within 30 days of completion of the project." Today, for 2017 Rules,the low density permit reads like this: " Upon completion of the project,the permittee shall determine whether or not the project is in compliance with the permitted plans and take the necessary following actions: a. If the permittee determines that the project is in compliance with the permitted 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 Anoting any deviations from the approved plans and specifications. Deviations may require approval from the Division; ii. A copy of the recorded maintenance agreement; iii. Unless already provided, a copy of the recorded deed restrictions and protective covenants;and i 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 permitted 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." Note that the difference is that in 1995 permits and 2008 permits,the responsibility was on the permittee. Now it is on the Designer. I hope this helps. Also, since DOT will take over the roads, I agree that their requirements should be enough. Please keep me informed on the progress towards getting the roads transferred. Thanks, Steve From: Mark Hargrove [mailto:mhargrove@ec.rr.com] Sent: Wednesday, October 04, 2017 8:16 AM To: Pusey, Steven<steven.pusey@ncdenr.gov> Cc: Lisa Beaman<e851isa@gmail.com>; e85jack@gmail.com Subject: [External] Oyster Landing-SW8 070653 CAUTION:This email originated from outside of the organization. Do not click links or open attachments unless you verify that the attachment and content are safe.Send all suspicious email as an attachment to report.spam@nc.gov. Steve, . In regard to your letter dated September 6, 2017, we will get someone to look at the pond and address any maintenance issues that were noted. For Phase 1,when this project was originally permitted I don't believe the State required any type of certification for Low Density projects. Let me know if this is not correct. The Oyster Landing HOA has requested that NCDOT take over the roads for Phase I and NCDOT has come up with a list of items that needs to be addressed before they will take them over. This list addresses your concerns. Once the HOA has hired a contractor to address the NCDOT concerns, I will let you know. Thanks Mark N. Hargrove, PE Port City Consulting Engineers, PLLC 910-599-1744 0 Virus-free. +.nrww.wv&st.com 2 Cat C 1\\ 2e31 o `1 5c 29,ebsc. p4c ' k,eel-1 7c6,, IA 1 5.f 724 ,15) c 7. 22 Sf I `'�. i3u- 214 .H / b ZfU4- 31. •It4 _4( 2_ ( ('-vc.t DA- tr c DA-24 i � ai� , q.s2- sf ((oq , ç&) Jt4c P. i1 ' 73 HL s-F 2 6,131 Lis if 04474'4) Jt3 UA .s 47gg, o°8� �f 2l 115Gt, 0 - P 34 .7 IDO D 4 O ve ca,t( 13N s_� 1 C54-11 I. 177 Sfs) / s� �.,... - II 2 2 0 Z C6 _f G 2 > = 704 g5 -�- 2,6$3,4. -r le- ll 1)i 6� 814 0-.14 i� 4-4.40-27-08Z- - inssi5 '" 7r ®� ? t oci * Y 42xe'✓L( -6S61,1-?7 r 1567 3 s u ;re • ,- 347.,? s�G teAck Pat., At. 2,G `°/9 f �� � o�, ei �fa - PORT CITY CONSULTING ENGINEERS, PLLC 11,EIN[j \J `_. L-MSn10M, 6216 STONEBRIDGE ROAD DATE 3/28/17 I JOB NO. WILMINGTON, NORTH CAROLINA, ATTENTION 28409 PHONE# (910)599-1744 RE: Oyster Landing Subdivision Storm Water Permit SW8 070653 TO: Steve Pusey NCDWQ 127 Cardinal Drive Wilmington, NC 28405 WE ARE SENDING YOU ®Attached ❑ Under separate cover the following items: ❑Shop Drawings ❑ Prints ❑ Plans ❑Copy of Letter. El Samples El Specifications ❑Change order ❑ Diskette ❑ Permit Forms COPIES DATE NO. DESCRIPTION 1 Engineering Certification for Phase II Pond ECEIVE ill BY: - THESE ARE TRANSMITTED as checked below: LI ❑ copies for For approval ❑Approved as submitted Resubmit approval ❑ For your use copies for ❑Approved as noted ❑Submit distribution ❑As requested ❑ Returned for corrections 0 Return corrected prints ❑ For review and comment ❑ ❑ FOR BIDS DUE 20 ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: Steve, the engineer's certification is attached for the pond for Phase II. The HOA is responsible for the Phase I roadside swales. They have recently requested NCDOT to take over the roads in Phase I and are waiting on the inspection report. The roadside swales will be cleaned out along with any other NCDOT issues once they get the inspection report. COPY TO: File SIGNED: A I A AttdeA..c...„ If enclosures are not as noted,kindly notify us at once.