The URL can be used to link to this page

Home My WebLink AboutSW8911207_Historical File_19911121 ..StArE4 if 4% State of North Carolina Department of Environment, Health, and Natural Resources Wilmington Regional Office James G. Martin, Governor Bob Jamieson William W. Cobey, Jr., Secretary Regional Manager November 21, 1991 DIVISION OF ENVIRONMENTAL MANAGEMENT )1Y-1(\l ( 1 � Mr. Sidney Edward Jones � � �� °' 49 Raeford Street Ocean Isle Beach, North Carolina 28459 Subject: Certification of Compliance with Stormwater Regulations Stormwater Project No. 910902 Jones Ford @ Shallotte Brunswick County Dear Mr. Jones : This Certification is pursuant to the Stormwater Application for Jones Ford @ Shallotte received on September 13, 1991, with additional information received on November 21, 1991. Based on our review of the project plans and specifications, we have determined that the stormwater control system complies with the Stormwater Regulations set forth in Title 15A NCAC 2H. 1003(i) . The runoff will be treated in a detention pond which is sized to achieve 90% reduction in Total Suspended Solids. This Certification shall be effective from the date of issuance until rescinded. The project shall be constructed and maintained in accordance with the final plans and specifications approved by the Wilmington Regional Office. A professional engineer must certify that the stormwater system has been installed in accordance with the approved plans and specifications. The attached certification should be received by this Office within 30 days of completion of construction. -Continued- 127 Cardinal Drive Extension,Wilmington,N.C.28405-3845•Telephone 919-395-3900•Fax 919-350-2004 An Equal Opportunity Affirmative Action Employer Mr. Jones November 21, 1991 Page Two If you have any questions concerning this matter, please call Alexis Finn or me at (919) 256-4161. Sincerely, �df4l'd'Y�Y , e Adkins Water Quality Regional Supervisor Attachment DA/aif: 910902.NOV cc: Don Covil, P.E. , Houston & Associates Robert Tucker John Parker, DCM Alexis Finn Wilmington Regional Office Central Files DIVISION OF ENVIRONMENTAL MANAGEMENT Evaluation of Stormwater Treatment and Disposal System Draining to Waters Other Than Class SA PROJECT DATA Project Name: Jones Ford @ Shallotte Project No. : 910902 Location (County, Township/Municipality, Address) : Shallotte, North Carolina Brunswick County Applicant Name: Mr. Sidney Edward Jones Mailing Address: 49 Raeford Street Ocean Isle Beach, North Carolina 28459 Submittal Date: September 13, 1991 Water Body Receiving Stormwater Runoff: Williams Branch Classification of Water Body: "C Swamp" DETENTION POND EVALUATION 1 . Yes No The design storage is for the runoff from all impervious surfaces resulting from 1-inch of rainfall and is located above the permanent pool. 2. Yes No The permanent pool is designed for 90% TSS removal. Therefore, no vegetative filter is required. 3. Yes No The runoff completely draws down to the permanent pool in 5 days, but not less than 2 days . 4 . Yes No The mean depth of the permanent pool is a minimum of 3 feet. 5. Yes No The inlet structure is designed to minimize turbulence and short circuiting. 6. Yes No An appropriate operation and maintenance plan has been provided for the system. -Continued- WET DETENTION POND EVALUATION CONTINUED 7. Yes No THIS PROJECT MEETS THE STORMWATER CONTROL REQUIREMENTS OF 15A NCAC 2H. 1003 (g) , (i) , (k) , and ( 1) (For Yes, 1 through 7 must all be circled Yes. ) Brief Explanation: The surface area of this detention pond has been designed to remove 90% TSS without the aide of a vegetative filter. DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN-OFF Wilmington Regional Office „ /,„ Date Individu 1 E(aluating Form/Plans ANN4700k KA/ )4411 kicACii Date Water {Quality Regional Supervisor cc: Applicant/WiRO/Mills/CF Engineer's Certification I. , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, (Project) for the hereby state that, to (Project Owner) the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. Signature Registration Number Date HOUSTON and ASSOCIATES, PA REC1, EL)3 Consulting Engineers SHALLOTTE, NORTH CAROLINA 28459 NOV 181991 Telephone(919)754-6324 WilitiftielifiefiiticniiOffice Facsimile(919) 754-2121 Post Office Bort 2927 Friday, November 15, 1991 Ms. Alexis I. Finn, Environmental Engineer Division of Environmental Management North Carolina Department of Environment, Health, and Natural Resources 127 Cardinal Drive Extension Wilmington, North Carolina 28405 Subject: Jones Ford, Shallotte Submittal of Revised Stormwater Plans Dear Ms. Finn: As a result of numerous conversations we have had with DEM over the past several weeks, we have revised the subject plans by moving the proposed stormwater detention pond to higher ground. Two copies of the revised plans are enclosed for your review. We trust that approval of the stormwater plan will be forthcoming. Your attention to this matter is appreciated. Sincerely, 4/4_„ef Donald M. Covil, P.E. Houston and Associates, P.A. Enclosures cc: Mr. Ed Jones File; 91-0424 (Jones Ford) � IY tird. State of North Carolina Department of Environment, Health, and Natural Resources Wilmington Regional Office James G. Martin, Governor Bob Jamieson William W. Cobey, Jr., Secretary Regional Manager October 30, 1991 DIVISION OF ENVIRONMENTAL MANAGEMENT Mr. Donald M. Covil, P.E. Houston and Associates, P.A. Post Office Box 2927 Shallotte, North Carolina 28459 Subject: Water Quality Certification Project #91701 Jones Ford Shallotte Brunswick County Dear Mr. Covil: The Wilmington Regional Office has reviewed your plans to impact an undetermined amount of wetlands adjacent to Williams Branch, Classified "C Swamp Waters", for the construction of a stormwater retention pond. Based on this review and site visits, it was evident that construction of the stormwater pond had already begun, making a detailed evaluation of wetland impacts difficult. If the wetland areas filled for the construction of the stormwater pond were similar to existing wetlands adjacent to the site, which we believe they were, significant uses were lost by the construction of the stormwater pond. These uses include water quality enhancement, wildlife habitat, and floodwater storage. Insufficient evidence is present in your submittal to conclude that your stormwater pond must be constructed in wetlands . Additionally, it is the policy of this Division to require that stormwater treatment systems not be constructed in wetlands. Therefor this Office is moving towards recommending denial of your 401 Certification. 127 Cardinal Drive Extension, Wilmington, N.C.28405-3845•Telephone 919-395-3900•Fax 919-350-2004 An Equal Opportunity Affirmative Action Employer 910701.oct Page Two Please provide us with information supporting your position that your project must be constructed in wetlands. Specifically can you construct your stormwater pond in another location, away from all 404 wetlands. Please respond within 30 days of the date of this letter. If you have questions, please call Jim Gregson or me at (919) 395-3900. Sincerely, ag2-12 Dave Adkins Water Quality Regional Supervisor JHG:910701.00T cc: Wilmington Regional Office Files Central Files Alexis Finn Wayne Wright (U.S. Army Corps of Engineers) HOUSTON and ASSOCIATES, PA Consulting Engineers SHALLOTIE, NORTH CAROLINA 28459 Telephone(919)754-6324 491BlIain Street Facsimile(919)754-2121 Post Office Box 2927 Friday, October 24, 199I Ms. Alexis I. Finn, Environmental Engineer Division of Environmental Management 1991 North Carolina Department of Environment, Health, and Natural Resources 127 Cardinal Drive Extension Wilmington, North Carolina 28405 Subject: Jones Ford, Shallotte Submittal of Revised Stormwater Plans Dear Ms. Finn: We have revised the subject plans to include a trash rack covering the riser and a hardware cloth covering the orifice. These revisions are in compliance with your letter of October 21, 1991. Two copies of the affected plan sheet are enclosed for your review. Your letter indicated that the only remaining item preventing approval of this project is 401 Wetland review and approval. We have been in contact with Mr. Jim Gregson, and it appears that DEM will soon be taking a position relative to this matter. Naturally, in the interest of our client, and in view of the sound stormwater plan proposed, we trust that a positive response will be forthcoming. Your attention to this matter is appreciated. grECIElh f U Sincerely, OCT 2 9 1991 L) M gi��,..: a 9oz !?i%44J7- �.�✓ Donald M. Covil, P.E. Houston and Associates, P.A. Enclosures cc: Mr. Ed Jones File; 91-0424 (Jones Ford Site Plan and ECP) 4 NT e State of North Carolina Department of Environment, Health, and Natural Resources Wilmington Regional Office James G. Martin, Governor Bob Jamieson William W. Cobey, Jr., Secretary Regional Manager October 21, 1991 DIVISION OF ENVIRONMENTAL MANAGEMENT Mr. Donald M. Covil, P.E. Houston and Associates Post Office Box 2927 Shallotte, North Carolina 28459 Subject: Additional Information Stormwater Project No. 910902 Jones Ford, Shallotte Brunswick County Dear Mr. Covil: The Wilmington Regional Office received additional information submittal for Jones Ford @ Shallotte on October 8, 1991 . A review of that information has determined that the following is needed to complete the stormwater review: 1. trash rack covering riser 2 . hardware cloth covering orifice Please note that this file is on hold subject to 401 Wetland review and approval by this Office. This information should be received by this office no later than November 21, 1991. If you have any questions, please call me at telephone number (919) 395-3900. Since ,ly, Ms. Alexis I. Finn Environmental Engineer AIF: 910902.00T cc: (2) Alexis Finn Central Files 127 Cardinal Drive Extension,Wilmington,N.C.28405-3845•Telephone 919-395-3900•Fax 919-350-2004 An Equal Opportunity Affirmative Action Employer ?roject I: 910902 File Name: DET902 Reviewer:Alexis Finn Project Name: JONES FORD SHALLOTTE Date: 10/21/91 ss*HH*zx*svzsssss*DETENTION POND ANALYSIS*tettwtssss##e*ssssssses Total Site Area, TA: TA= 255983 ft"2 tt [TA (acre)] / [43560 ft"2/acre]= TA= 5,876561 Acres Total Drainage Area, DA: DA= 190949 ft"2 It [DA (acre)] / [43560 ft"2/acre]= DA= 4.383585 Acres INNERVIOUS SURFACE AREA CALCULATIONS: Structure Surface Area, A Runoff Coef., C st Buildings: 11858 1 Adjusted Surface Area = A * C = 11858 ft"2 It Parking/sidewalks/streets: 109961 0,95 Adjusted Surface Area : A $ C = 104462.9 ft"2 It Gre y; Areas: 69130 0.2 Adjusted Surface Area = A $ C = 13826 ft"2 It TOTAL: 130146,9 ft"2 It Percent Impervious, %I: note: SA=(BUILDING + PARKING.,)= 121819 sf 1SA/TA]*100= [ 121819 / 255983 ]8100: %I= 47.591;1i Note: If %I < 30% check Density Option. If %I > 30%, require engineered system to minimize non-point stream degradation. POND SI2IN': Minimum Required Storage Volume, VOLreq: note: SA has been multiplied by runoff coefficients [SA (tt`2) x (1 inch of runoff) * (1 ft/12 inch)]: [ 130146,9 ft"2 * 1 inch s 0.083333 ft/inch]: VOLreq: 10845.57 ft"3 #t POND SITING: Bvttom Elevation, ELb: ELb = 11.5 ft It i';Tianent stool Elevation, ELpp: ELpp 15 ft It erm.ment Pool, App: App = 9881 ft"2 It sorage Pon Elevation, Esp: ELsp= 16.1 ft ft of at.;rage Pond, Asp: Asp : 13950 ft"2 It PuLott Storage Cepth, d: (via project engineer's design: d = ELsp - ELpp) d= 1.1 ft It Storage Volume Provided, VOLpro: Side Slope: 3:1 ###i Volume 1, Vi= App * d = 9881 ft"2 * 1.1 ft = V1= 10869.1 ft"3 Volume 2, V2: (Asp - App) * d * 0.5 : V2= 2237.95 ft"3 VOLpro = V1 + V2 : 10869.1 ft"3 + 2237.95 ft"3 VOLpro= 13107.05 ft"3 Nate: VOLreq < VOLpro; excess storage is available, therefore Pond Size is Acceptable. ..--� S Excess itOrng•: "(V. Lreq 1 YCLpr o) 1 100 ",;. +7 111< DETENTION POND ANALYSIS CONTINUED: PAGE TWO PERMENAN POOL' Perm. Pool at Normal Level. 15 ft Bottom of Pond : 11,5 ft Provided, D - 3.5 it :kay, depth ? OFF fl, SA/DA CALCULATION: Ey Chart #4; @ 90% TSB: Depth, D - 3.5 ft t Impervious : 47.59% DA - 4.383585 Acres Where DA is the Draninage Area SA/DA % = 4.8 ##*# Area of Permanent Pool Required = (SA/DA %) * DA area of Permanent Pool Required = 4.8 $ 2.981162 Acres Area of Permanent Pool Required 0.210412 Acres Area of Permanent Pool Required = 9165,552 ft"2 provided9611-Sf C--vi;: sufficie t•stor Area of PERMANENT �=quire^- 9+65.4,- =- area of OUTLET SIZING: VOLpro = 13107.05 0,-ifice outflow, 2 Day Drawdown = Volpro/[(2 day) * (86400 sec/day)] Cr fice outflow, 2 Day Drawdown = 13107,05 ft"3 / 172800 sec = Q2= 0.075850 cfs Orifice C.S. Area, A: A: Q/[Cd((2gh)"0.5))] A. 0.015850 / [0,6e((2e32,2e1.1)11.5))]= A2= 0.015020 ft"2 A2= 2.162883 inch"2 Pipe diameter, d: d2= 1.659478 inch Note: Head, h : maximum pond level - permanent pond level : 1.1 ft Coeficient of Discharge, Cd = 0.6 Crifice outflow, 5 Day Drawdown = Volpro/[(5 day) * (86400 sec/day)] Orifice outflow, 5 Day Drawdown = 13107.05 ft"3 / 432000 sec = Q5: 0.030340 cfs Oritice C.S. Area, A: A: Q/[Cd((2gh)"0,5))] A: 0.030340 / [0,6*((2*32,2x1,1)"0,5))]= A5= 0,006008 ft"2 A5= 0,865153 inch"2 Pipe diameter, d: d5= 1,049546 inch CHECK: ;� �i�Y4i�=i1 i i ; .� � 1,S S 1,1 Orifice, is s1...? HOUSTON and ASSOCIATES, PA Consulting Engineers SHALLOTIE, NORTH CAROLINA 28459 Telephone(919)754-6324 4918 Main Street Facsimile(919)754-2121 Post Office Box 2927 Friday, October 4, I991 Ms. Alexis I. Finn, Environmental Engineer Division of Environmental Management North Carolina Department of Environment, Health, and Natural Resources 127 Cardinal Drive Extension Wilmington, North Carolina 28405 - p C CC DU IE Subject: Jones Ford, Shallotte Submittal of Revised Stormwater Plans OCT 8 1991 Dear Ms. Finn: D h7 'nun # `I1090Z We have revised the subject plans, and hereby provide other information to comply with the comments presented in your September 30, 1991 letter to us (copy attached). The revisions and/or information presented below are in the order of the comments presented in your letter. 1. Sheet Number 2, "Site Plan", has been sealed, signed, and dated. 2. A notarized submittal authorization is provided. (It is noted that our records show that we provided this with our original submittal to your office.) 3. Property lines are clearly shown on the plans. 4. Based on our telephone conversation with you on 10/2/91, we do not need to respond to the comment about the "routing of impervious surfaces". 5. Pond inlets and outlets are shown on the plans. Labeling has been added for clarity. 6. Sufficient detail for constructing the pond inlets and outlets is presented on the plans. Finished grades are provided on the plan view and elevations are provided on the associate details. Energy dissipation features have been added. Ms. Alexis Finn Page 2 Jones Ford SW Revisions October 4, 1991 7. The US Army Corps of Engineers has been on site and has granted a Nationwide Permit for construction activities within the wetlands area. They have determined that due to the nature of this site and area to be disturbed, a Predischarge Notification is not required (i.e., the COE does not require a 401 Water Quality Certification). DEM can confirm this through contact with Ms. Jean Benton, COE, 251-4511. 8. A note has been added to the plans which addresses the receiving stream characteristics. 9. An executed Operation and Maintenance Plan is enclosed. One set of revised plans, along with the other items mentioned above, are enclosed for your review and approval. We trust that this information adequately addresses all of the comments presented in your letter. Please give us a call at your earliest convenience if any concerns remain or if additional explanations or information are necessary. Your attention to this matter is appreciated. D I IE 0 t D Sincerely, OCT8 1991 -I DEM' ''ROJ # 9/0902_ Donald M. Covil, P.E. Houston and Associates, P.A. Enclosures cc: Mr. Ed Jones File; 91-0424 (Jones Ford Site Plan and ECP) AUTHORIZATION FOR PREPARATION OF STORMWTATER PLANS AND SPECIFICATIONS AND SUBMITTAL TO THE NORTH CAROL • DIVISION OF ENVIRONMENTAL MANAG ' U OCT 8 1991 PROJECT: JONES FORD U E ?RtOJ # gioca-z. I, Sidney Edward Jones, do hereby authorize Houston and Associates, P.A., Consulting Engineers, located in Shallotte, North Carolina, to prepare stormwater plans and specifications for Jones Ford as necessary to make submittal to, and obtain approval from, the North Carolina Department of Environment, Health and Natural Resources, Division of Environmental Management (NCDEHNR- DEM). It is my understanding that said submittal is to be made to the NCDEHNR- DEM on behalf of Jones Ford, as required under 15A NCAC 2H. 1003, for compliance to the North Carolina Stormwater Regulations. WITNESS my hand this Q}`-• day of September, 1991. 11/ Sidney Vlward Jo 49 Raeford Street i Ocean Isles Beach, N.C. 28459 STATE OF NORTH CAROLINA COUNTY OF BRUNSWICK I, a \e*, C . hVvreN - , a Notary Public of the State of North Carolina, County of Brunswick do hereby certify that Sidney Edward Jones personally appeared before me this day and executed the above authorization. WITS$, nd and notarial seal this the �1, }v` day of September, 1991. .=' �� i NOiARO. % `5111 a. pbBLO C ; cj ; 1. . ' � �° " 'k• NOTARY PUBLIC oo�C�,C 0��N�o�`'„ My Commission expires Mo.� Co \gcti, . e" o (*i4 State of North Carolina Department of Environment, Health, and Natural Resources Wilmington Regional Office James G. Martin, Governor Bob Jamieson William W. Cobey,Jr., Secretary Regional Manager September 30, 1991 DIVISION OF ENVIRONMENTAL MANAGEMENT Mr. Donald M. Covil, P.E. Houston and Associates Post Office Box 2927 Shallotte, North Carolina 28459 Subject: Additional Information Stormwater Project No. 910902.SEP Jones Ford, Shallotte Brunswick County Dear Mr. Covil : The Wilmington Regional Office received a stormwater submittal for Pembroke at Landfall on September 13, 1991. A preliminary review has determined that the submittal for the subject project is not complete. The following information is needed to continue the stormwater review: 1. All P.E. seals need to be signed and dated. 2 . Provide a notarized submittal authorization. 3. Delineate property lines and show all existing and proposed impervious surfaces. 4 . Show all routing of impervious surfaces to the pond. 5. Pond inlets and outlets need to be shown on the site plan . 6 . Provide details of pond inlets and outlets with energy dissipation and relevant elevations noted. 6 . Are wetlands located on-site? If, so please indicate type and location on the site plan. -continued- 127 Cardinal Drive Extension,Wilmington,N.C.28405-3845•Telephone 919-395-3900•Fax 919-350-2004 An Equal Opportunity Affirmative Action Employer Mr. Covil September 30, 1991 Page Two Stormwater Project #910902 7. Where is runoff (in excess of design volume) routed? Provide receiving stream characteristics? 8. Provide a detailed Operation and Maintenance Plan with the owners: name, address, phone number, signature, and date signed. Please note that this is a preliminary review. This information should be received by this office no later than November 1, 1991. If you have any questions, please call me at telephone number (919) 395-3900. Sin ely, 5g!7e Ms. Alexis I . Finn Environmental Engineer AIF: 910902 .SEP cc: ( 2) Alexis Finn Bill Mills Central Files AUTHORIZATION FOR PREPARATION OF STORMWATER PLANS AND SPECIFICATIONS AND SUBMITTAL TO THE NORTH CAROLINA DIVISION OF ENVIRONMENTAL MANAGEMENT PROJECT: JOKES FORD I, Sidney Edward Jones, do hereby authorize Houston and Associates, P.A., Consulting Engineers, located in Shallotte, North Carolina, to prepare stormwater plans and specifications for Jones Ford as necessary to make submittal to, and obtain approval from, the North Carolina Department of Environment, Health and Natural Resources, Division of Environmental Management (NCDEHNR- DEM). It is my understanding that said submittal is to be made to the NCDEHNR- DEM on behalf of Jones Ford, as required under 15A NCAC 2H. 1003, for compliance to the North Carolina Stormwater Regulations. WITNESS my hand this 'A}‘^ day of September, 1991. Sidn dward Jo s 49 Raeford Stree Ocean Isles Beach, N.C. 28459 STATE OF NORTH CAROLINA COUNTY OF BRUNSWICK I, �cA . 6. \ �,be , a Notary Public of the State of North Carolina, County of Brunswick do hereby certify that Sidney Edward Jones personally appeared before me this day and executed the above authorization. WITNE S,, ,4 d and notarial seal this the L1'"~ day of September, 1991. `��.LV,,`''cA�B:....t/46F''�,. ••. • v OTA1g4 : _ 'eGA'• •'* 4° NOT• 'YPUBLIC P y •. •• . .. My Commission expires t 1 10►GL, . in) SEP 1 3 1991 2ROJ HOUSTON and ASSOCIATES, PA Consulting Engineers SHALLOTFE, NORTH CAROLINA 28459 Telephone(919)754-6324 4918 Main Street Facsimile(919)754-2121 Post Office Box 2927 Monday, September 9, I991 Mr. Daniel E. Sams, P.E., Regional Engineer Land Quality Section North Carolina Department of Environment, RECEIVED Health, and Natural Resources 127 Cardinal Drive Extension Wilmington, North Carolina 28405 � � 1 � � Iiifli ington Regional OfficC Subject: Jones Ford, Shallotte "r"' Submittal of Financial Responsibility Form and Fee Dear Mr. Sams: Enclosed are two copies of the site plan, erosion control/stormwater plan, calculations, and Financial Responsibility/Ownership Form for the subject project. Also enclosed is a check for $110.00 to cover the application fee. This submittal supersedes our August 21, 1991 submittal which modified the existing plan filed under 'Williamship Dealership" for an additional 12,000 SF (building pad area) of impervious area on the project site. By copy of this letter, we are sending two copies of the site plan, erosion control/stormwater plan, and calculations directly to Ms. Alexis Finn for stormwater review. Also enclosed with our submittal to Ms. Finn is a form in which the owner grants Houston and Associates the authority to submit a stormwater plan for this project. We appreciate your attention and assistance with this project, and trust that you will contact us as soon as any questions may arise. Sincerely, Donald M. Covil, P.E. Houston and Associates, P.A. Enclosures cc: Ms. Alexis Finn, NCDEHNR Mr. Ed Jones i D I�+) File; 91-0424 (Jones Ford Site Plan and E U SEP 1 3 t99t Rod # 9c p ? o 2. Ruston and Associates, P.A. JOB ,ro,.f��== / o Si7,- PLNN SUBJECT /� zi ,ii Y/ S43 j,.-- ,1,.iJ..C-fe S CONSULTING ENGINEERS SHEET NO. F 4918 Main Street Post Office Box 2927 CALCULATED BY (--i.-,-.-r DATF 8/2219/ Shallotte, North Carolina 28459 (919) 754-6324 CHECKED BY DATE SCALE • I I I I I I I I 1 i I I I , I I I I I I I I I I I 1 I I 1 Y T r 1 I I I I I I I I I I - I I I r r , -'� -Y--t--r I I I I I 1 I I I 1 I 1 I I 1 ---r----1--7-- --T--r--r--r-- 1 1 7 T 7 r r r --1--7--T--T--- I I I r I I 1 I I I 1 1 I I I 1 1 I I I I I I I I I I L 1 1 L 1 I___r____1__1__ __7__r__r__r__ 1 1 -I 7 1 r r r 1 1 7 r 1 r -- --T--T'-r-- I I 1 I I I I 4Lh-G ft1n� I II 1 : I • �h\ L I I I I 1 Ulrc ) . I 1 I 1 1 1 1 I 1 y I 1 1 I , 1 1 1 I 1 I I r//1+� I /�I/ I 11 I I / 1 I�'+ 1 , 1 1 I ___L___ Lrjn_ _Lk1 _L Lc1`L� C'��JL Ll_�Y�CLI LW�i_L�_1�Y_Q14„. J/JIC L1 Lem S_L l��h-Li 1__J.__L__L 1 I 1 I 1 I 1 I I 1 I I I I /1 / I I , I 1 I / lilt I I I tilt 1 I I 1 I I I 1 1 I 1 till I I I I L J J 1 L L L J J 1 1 L L L J 1 1 J. h__L_-IJ J 1 1. L I /I 1.1 1 I I �JI /� 1 1;1 1 1 11 1 1 1 1` 1 1 w `!1�1 1 1 1 1 1 ---,____,t6fi�.ICJ --EX.L:s�T��ur'_/4(LI'_�-- LCGe.L�t __44ak�eFi„4411 1—ez4—_—. ,,— 41--i--i--i--i 1 I I 1 1 1 1 1 1 1 1 I I I 1 , 1 1 1 1 1 1 1 1 1 1 1 1 • T) I � 11/ 1 1 1 1 .I(, �/ 1 I 1 .y� /� 1 1 1 I 1 V U fAl t'rQj 4 7' 1/� z� �" r/i.., ./{ 171£•G a ly I ��,,�pe l 4,�` I 1 I 1 I 1 1 1 1 1 1 1 I 1 1 , 1 1 I , - 1 1 1 I I I I I I I I I I I I I I -, 1 I 1 , I I I I ---r----1--7-- --T--7--r--r----1--1--1--7--� r r , 1 7 7 T , r 1 --7--T--r--1 4 /I,/ a/1�, /�,� /) Iy �/y .f J1111 , '/_ I__ _e e C2S-2• ' 1 LQ-4 •• !Lic �_ d1r 1(C�+,.,ti�_ 1:�L J11// _ 1 1 I I � - r r 1--1 -1--___iii - r r- , 1- �- 7-- - , r ,,,, -7--r--r--r I I I I 1 1 I I I I , I I I , I , , I 1 I I I I I 1 I I L I I I L J I 1 I IJJqq '' // I I I�J,.� J1 1 1 1 I 1 , I / I I ,/ y. I T I ltl _ _kai—th_LZ(•t,t1__ A1h tLLCC 1 r -4he�_1t‘1_ .1_1__Ll'w_SJ J_L�_1__1__1__L YYY -L 1 J 1 I 1 I I I 1 1 1 , 1 1 1 I 1 I 1 1 1: 1 I 1 • 1 I • 1 I 1 i .I I I I 1 ' ��._i_1 L I 1 , 1 I i 1- ____JL � 13GL�_L�.Gf�._Jt�na y L L J 1 1 y 1 I I I I I I I , 1 I 1 1 1 1 1 1 I I I 1 I I 1 I I HH --7 T T r r r 1 --T--T--r--r 1 1 1 1 1 1 I 1 I 1 1 1 1 1 I I �-11 •I , , l , , _�NGl 7 It. E.-T 1- i L?.e., /F'` I I 1 I 1 I 1 I -C r- �__�__T__J. r r 1 7 7 r j r 1 71 Ti r I I I I I 1 I I , I 1 i i J i • i 1 L J 1 1 I `T� I 1 u 1 1 I '` r r� 5, I y I t. ___L____J_Ld__- �l_QL__L�L_L`_1L�r:.ad+GJ_Q�1_ ___L 'CCiI•�.I i,_\:•J_ l31_G L,_L__Ly'Y_;J t_w�. _11_-'i.¢__L I I I 1 I I I 1 I I I I I I I I I I I I I I I 1 I I I I L J J 1 1 L 1 J J L L L J J J. J. 1- L -1 J 1 J. 1 L ICJ I I I I I V 1: ' b=�}� A� CI)I1 1 II , 1 , 1 I 1 , 1 1 I 1Y I I I I I I I I f d, '2' /, - I I r I-- _y } i 14.1 ( ' V�41___ci4c. -- -,ILL'"°r��rf-r - 1�- J _tI ctL. I `r_ e- 5 - 1 I I ✓ I I I 1 I I i I I I "`TTT i I I , I I I 1 1 I 1 I I I I 1 I 1 I I I I 1 1 , I I I I I I r 1 1 T r r r 7 1 1 T r r r --1--T--T--T-- r 1 7 T r r I I I 1 I 1 I 1 1 1 1 I 1 1 1 tilt I I 1 I I I 1 1 1 1 1 1 1 1 1 I 1 1 1 I I I I 1 1 1 1 1 r 1 1 T , r r 1 1 1 T r r r __1__7-_7__r__+ 1 7 r r 1 I I 1 1 , I I I 1 I I I I I 1 1 1 1 , I 1 I , 1 , 1 1 I , I I I 1 I 1 I 1 I I 1 I 1 1 I I I 1 1 1 f ,.1 I:.. T I i 1 I 1 1 1 [ I 1 r /"I 11 1 r , 1 ,L I t.e-/ t J I I 1 1 1 1 1 1 1 1 1 l•-- J2____1__/1__L _L__�-k J__,J t�1'_^1v�R-!11 L J 1 1 1 I- I 1 1I I L 1 I 1 1 1 1 1 1 1 1 1 I 1 1 1 1 1 I 1 1 1 1 1 1 I 1 I I 1 1 1 I 1 1 , I 1 1 1 �IL� 11//J L LL J \J[1///'1 L '/L/ L it J 1(� 1 1 I___L JJ__(((_ -Lk J 1 1 __lZ�Id.IJ_ICaf l�i_ 2bLS Li-=�- _ JI RA-�1.1- Q�F_�'L�t �.l I _/� L-,._3 � )1`_� 1 1Jz_ �h 11 I I\ I , a�_�t 11l 1S r.� c. 1 1 1 1 1 I I , I I 1 I I I 1 I I 1 I I I I 1 I I I L 1--� 1 L--1--___.J-- ---'__; I L L 1--}--}--y r--F-----1-- --}--1--y--L I I 1 1 1 1 1„..--. 1 ) I i I I I I I I 1 I I I I I I I I G I !° I C Ala .-" I I I 1 I I ; I I I I I I I 1 1, 1 �I 1 , 1 I I 1 1 I I I I I I I 1 I I I I 1 I I I I 1 ___.___-_1__y__., r__r__ _1I__y__1I__.1 r r r -1 T T T 1 y__ I 1 1 1 1 1 1 1 I 1 1 r r 1 1 1 1 1 1 1 1 1 I 1 1 1 I 1 1 I I 1 7 -1 T 1 r r 7 1 7 T r r r I I I t-y , '�7 i 7-- I -r--r -- ha!ra 1f ,- ^ 1"!i_ !M fR..r..1. !T"' ",:7-sl.� 1 .w. 11,,cam= t1_IG` . ,r tr /1• �,-- t I 1 1 r -r `I-.•- 1 rw-7 r r -r/1 M 7 7 -`"`r-- I` -1 - -r 1 I1( Imo(///I 1 1 I 1 I L. 1 1 ` 1 1 1 1 . 1 JI 1 1 I ,, I 1 I I , 11 I I I 1 I I I 1 1 1 I I I I I I I , . 1 I , I 1 DENT .oj # 9/090 Z Ilouston and Associates, P.A. JOB SUBJECT CONSULTING ENGINEERS SHEET NO. OF 4918 Main Street Post Office Box 2927 CALCULATED BY DATF Shallotte, North Carolina 28459 (919) 754-6324 CHECKED BY DATE SCALE •1 I 1 1 1 1 1 1 1 1 1 1 I 1 1 1 1 1 I I I 1 ---1 I IIII I I I I I I I I I I I I I I I 1 ----1--7-----T--r--r--r--^-y---1--�--T I r r--r 7--T--T--r r r --T--r--r-- I I I I I I 1 I I I i 1 1 I I 1 I I I I I I I I I I I I I 1 1 I I I I I 1 1 1 I r 1 1 T r r 1 1 1 T r r r 1 1 T T 1 r 1 1 T r r "�{�� J I I I I 1 1 1 I 1 I 1 I I I I 1 I I y �_S.J•s. _ire MT- r-, -1 >}.`s�1 S-•'T W T r r 1 I I I L I 1 I l 1 1.: r 1 r 17 r r 1 1 1 I 1 I I I `rl I 1 I 1 1 I I 1 I 1 1 1 1 I I I I 1 1 1 I L 1 I I _1 L I I I I I I I/� I I I r J1 I I 2 y,//////'';;,� 1 I 1 )r 1 1 1 r I� 1 I 1 �( 1 , ( j) I ffYF7t) 44 h ra I l'.` 1 c sl..., 1 ,101, ,'711IN1Y ^ J11 1 1 I ___L____J^_J_____1_S L__L_ LI" J J S' _r__L____� J{I -1-,--1{I--1}I--L1 1 1 I I I I 1 1 1 I I I 1 1 I ---~----J---I -at-4--}--~-Jd"T/b-A--J--Ist 4E'-,---}--1'- -r} -- --'1--{--+ r -----J CS , lb � 3� }__ � + _ __y__t__}/ n___1) ____y__y 142 4}__r__ Q__y__y__} Li35r. ^ S____y-_{__}__*}I --_- I I I I I I I 1 1 I 1 T 1 1 1 1 1 1 1 I 1 1 1 1 I 1 1 1 1 I 1 I i 1 1 I 1 1 I I 1 1 I 1 1 1 1 1 ---r----7--7---,.. ..T--r--r��Q--i--11�� t3---r--r--f t0Q--- I �},�- �'ri 4._ 1a._ {.y I I --1 -T--7 --- r�� 1-fi - I I I 1 1 I 1 I I 1 1 1 I I I I I I 1 1 1 T r r r 1 1 l `Ty Q r r r i 1 1 4 4 1s L r/ �.�1I 17 T r r?� �J�y r 2�- • :1S -'J1._�_:_bi/Id.._ l3_1ia l!�_r-- 1 I 1 I 1 I I I 1 1 1 J J _ 1 L L L J J J 1 L L J 1 1 1 L L J 1 1 1 L 1 1 I I 1 I I I I I 1 I I I 1 1 I 1 •i �.iS r <.Iy`1'i1. I I 1 1 1 1 1 1 1 II I 1 I I 1 ' J J - 1 1 L L J J J 1 J. L L L i J 1 J. 1 J 1 1 L _-_ _- 4-S___-I__.,_` , +�{8____}__I--41 �__,__,� _LJr _ I ]L SJ{__{__ 1 1 1 . I I 1 I 1 1 I I 1 1 I I I I I 1 I I r r_y , 1 1 I 1 1 1 I I I I I 1 1 1 1 1 1 1 1 1 1 ---r----1--1-----T r +r 1 .}pF-1 1 i f i t r i / 1 1 T r r r 1 1 T r r I I 1 P..P'S J/ 1.J.t` + . ' 1�F�n .,i ! 11:'ISi 1 1 1 1 I 1 I 1 1 1 I' I I 1 1 1 1 - 1��.y I 1 I I I 1 1 T r r r 1 1 1 I T�r--r—_°-- F1--T--r--} L r 1---T--T--r-[ •I + 1 I /1 / / I I t J 4J)--f-Ii1''rF4-t_LE___Et_ i___ -YTDJ3�1__Y2C« L EI-l�'_-J6 -4LF' 1_ti.:.QM-_` 1 1 t 1 1 1 I I 1 1 I 1 I -� 1 1 1 1 I I 1 I 1 I 1 1 I I 1 I 1 1 J J - 1 L L L J -Ili J 1 LLL J 1 1 1 L L J 1 1 1 L I I I I 1 1 i I 1 i I I I I 1 I I i I I 1 1 1 I I 1 1 I 1 I 1 1 L J J 1 L L J J L J 1 1 1- J 1 1 1 1 1 I 1 1 1 1 1 1 L 1L 1 1 1 1 1L -I 1 L 1 L 1 ! I !' I t I I 1' I I I I I I I I I II II 1I I I 1 1 1 1 1 1I 1 I 1 I 1 I 1 I 1 I I 1 I I I 1 1 I 1 I 1 I I 1 I 1 1 1 1 1 I 1 I I 1 I 1 1 1 r.____y__y_____ __r__r__r____y__.y__y__} r__r-_r __.T__y__y__T r r 1 y__T__r__r_- I 1 1 1 1 I I 1 1 1 I 1 1 I I I I I I 1 I I I I I 1 I I I I I r r r 1 1 T T r 1 T T r--r-- I 1 1 I 1 1 I I I I 1 I I I I i I I 1 1 1 I I jr 1 I I 1 1 I I 1 I I I I I I 1 1 1 1 1 T r r 1--1--r-- r 1 T r r - r 1 1 r--r r r L I I I I 1 f 1 1 I 1 1 lilt 1 1 1 1 I I I 1 1 11 1 1 1 1 1 1 I I I 1 1 1 1 1 f 1 1 1 I 1 I 1 I 1 1 1 1 1 1 I 1 I 1 I I 1 1 I 1 I 1 J J 1 L L L _J J 1 1 L L L L J J 1 1 1_ _I 1 1 L I I I 1 I I 1 1 I I I 1 1 1 1 1 1 1 1 1 1 I I 1 1 ___I-____J-_J-_-__-I L L J J J 1 L L L t_ J 1 1 F__L___ J 1 1 L I 1 I I 1 I I 1 I I 1 1 1 I 1 1 I I I I I I 1 I I I 1 I I 1. L L J 1 1 1 1_ L J J 1 1 L I I I I I I I I I I I I I I 1 1 1 1 I I I 1 1 1 1 1 1 1 1 1 1 I 1 r 1 1 1 ---L----J--{-----1 1_ --1--J--1 1 --1---1- J--J--1--} r--L----"�-- 1 1 1 1 I I I I 1 1 I 1 1 1 1 I I 1 �_ I 1 1 1 I 1 1 I 1 I 1 1 I I I I I I I I 1 1 1 1 1 1 11 1 I 1 1 1 1 I • y r *-__ -1--1--1--T r--r 1--T--T--T--'--r--r 1 T r 1 1 e i 1 I I I I I ! 1 I 1 1 I I 1 1 1 1 1 1 1 I T .,J , r 1 1 1 T r r r 1 1 1 T T 1 r 1 T r r - 1 !'•1 / � - r 1 1-- (_ 1 I 1 I 1 1 1 1 1 1 1 1 • eft 1^ 1 � _- _ +`1K• ��Q� 1 1 1 1 I 1 L 1 1 1 1 1 1 1 I I I ; 1 I I I 1 I 1 1 1 I ! 1 I I I 1 i 2. Iv.`M) - yr c'A I I : 1 1 ' 1 1 I 1 1 1 1 1 1 i I I �� 1 I 1 1 1 1 1 1 1 1 1 1 r CHART 3 NORTH CAROLINA COASTAL REGIONS SA/DA PERCENTAGES FOR WET DETENTION BASINS DESIGNED TO REMOVE 85% TSS ( 1 " STORM) SA/DA % For Basin Depths Impervious % 3 Ft 3.5 Ft 4 Ft 5 Ft . 30 2-.5 2.2 . 1 .9 . 1 .6 40 3.4 3.0 2.6 - 2. 1 50 4.2 3.7 3.3 2.7 60 5.0 4.5 3.8 3.2 _ 70 6.0 5.2 4.5 3.7 80 6:8 6.0 5.2 4.2 90 7,5 6.5 5.e 4.8 • CHART 4 SA/DA PERCENTAGES FOR WET DETENTION BASINS DISCHARGING DIRECTLY TO A STREAM (HENCE NO VEGETATIVE FILTER, POST-DEVELOPMENT DISCHARGE -- - -.. .-__ _ RATE < PRE-DEVELOPMENT RATE _FOR 1 O_ YEAR STORM) - SA/DA A For Basin Depths Impervious % 3.5 Ft • 3.5 Ft 4 Ft 5 Ft 6 Et 30 3.5 3 2.7 2.2 1 .6 -40 4.5 4 - 3_5 2.8 2. 1 50 5.6 5 4.3 3.5 2.7 60 7.0 6 5.3 4.3 3.4 70 8. 1 7 6.0 5.0 3.9 t 80 9.4 8 7.0 5.7 4.6 90 10.7 9 7.9 6 .5 5.2 Interpolate intermediate values - - - SA/DA % = :surface area basin/drainage area to _basin._x -I 36A Houston and Associates, P.A. JOB s-°"e....r °~d SUBJECT 7.6-n/°dy CONSULTING ENGINEERS SHEET NO. OF 4918 Main Street Post Office Box 2927 CALCULATED BY 47i,,.... DATF 8/21/4/ Shallotte, North Carolina 28459 (919) 754-6324 CHECKED BY DATE SCALE I I I I I I I I ! I I IIII , 1 1 1 1 I 1 1 1 1 1 1 1 1 1 , 1 I 1 ---r----1__1__---7--Y--r--r----7---1 7 7 r--r--r _1--7--7--7 r r 1 1--7--1--r-- 1 I I I I 1 I I I I 1 I I I I 1 1 1 1 1 I I I I ---r----1--1- T r r r 1 1 7 7 r r r 1 7 7 T j r -I 1 17 T r I I 1 I 1 1 1 1 '� _ /FQ<A 1 I I I I I L --r- -- t8 TTT---r [� C 7 1 1 1 r r r 1 T T r , r T r r I I , 1 1 1 L I 1 1 1 , I I ((''""11 ) �///jf�� //�� \\//!!, + //JJI.B, 1 I 1 ___L____J IY��„1Ih T-L__a_rt_(,b_4) a 5��L_0,_ ,s =J-_�S 67-1 L J LLLI _-- -__- __ ---.-- _- _- -- ____1__J_-1-_1_ 1 L L 1 J 1 1 1 F__L--__-I 1 1 I I 1 1 1 1 I I 1 , 1 I I I ,1 I I I 1 1 1 1 1 1 1 , 1 1 1 1 I ---r------1--1-----1--1---r-4.-=-11_141 x-/_2,-' r--1- -- L1' 2 rn+---='rr `I - 1.'11 1 ' -+ 1 1 1 1 1 1 1 1 1 1 el 1 1 1 1 I 1 1 1 I 1 I 1 1 1 1 1 1 1 1 1 1 1 I 1 1 I I I I i 1 1 I 1 1 1' 1 I I I I I I 1 I I/ 7 124 I�r�1 lirs1 1 1 1 1 1 1 1 ---r----1--1-----"IT--r--r- '�----'l -jam-T- — r r r 1 7 T T r 1 7 T r r I I , /0 1 , I I I I I 1 1 I I I 1 1 1 I I I 1 I I I 1 L I 7 1 T r r r 1 7 1 1 r r r 1 7 7 T r 1 7 T r I I 1 I 1 1 I I tilt 1 I I I I I I I 1 1 I 1 1 J J _--1--1--Ly i, C...kt_A : (._(p�) 1 ` -K _ti 71. I y,/�,A I 1 I I f -=-- - - , , - -- 1--1 - - J7-dL L. J 1 1 1 L I I I I I 1 1 , I I , I 1 I I 1 I 1 1 1 1 1 1 I 1 1 1 1 I I I , 1 1 1 1 1 I I I I I I 1 , I I I I 1 J J 1 1 L L L r. J 1 1 J. r__L-J__�-- 1 1 1 L 1 1 ,1 . _ c.Ij J @ 1�``� , /LV 1 \ / 1 1 �11 1 1 JJJlll 1 • 11 . 1 1 1 I I I 1 1 1 1 1 I �J I5. 1 1 1 , 1 1 1 1� -f• /. r -1 •t--7-_T--r__ 1 I 1 I I 1 I 1 1 1 1 , I I I 1 1 1 1 1 I 1 1 1 1 1 , 1 1 1 ---r--I--1--7--- T r r r 1 1 7 7 r r r 1 1 7 r r...r I I 1 pp I 1., I 'q / , L\ (Al 1 7 i i r 1 I 1 i,\ JJ J 4." IL Iy. AA) I ♦-\ ! i r W-I 6-.J I I G l �I ` , .1 = , I I / �y 1 I 1 I 1 IIII I III II I I I , I I I 1 1 1 1 1 1 1 1 1 1 I 1 1 1 L I I 1 I 1 1 _ T r r r . 1 1 7 7 r r r 1 7 T T r 17 Tr I I I I '-T. 17 I • I /1/ 1 1 I I 1 I I 1 1 _ I I I 1/1�I /N-7/ N'1 1 I 1 I I I 1 1 I I 1 1 I I 1 1 1 1 1 I J 1 I 1 1 1 1/0 1 I I I I 1 1 1 I , I I 1 I L J J 1 1 L L J J 1 1 L L L J J 1 1 L J J 1 1 L I 1 I I I I I I I I I I 1 1 1 1 I , 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I 1 1 1 1 r._J J J 1 1 L L J 1 1 1- L J J 1 1 1 L I 1 I I I I 1 I I 1 J , I 1 t I t 1 I A L._ ; 1 1I 1 I7 I I I 1 I 1 ` Ilex �• IT� 1 �.+!GI 4 ,1=-' r� �'r-i.r I I t �0 1 I I I 1 1 ` 1 1 I I 1 I 1 1 1 1 1 1 I I I 1 1 1 1 I I I iiii I I I I I I I III I I 1 I 1 I I 1 1 I I I I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 __-r__-_y_-y_____7--r—_r_—r___—y--y__1__7 r--r--r -1--7--Y--t-- --r--r 1 7--7--r--r-- I I I I I I 1 I I I 1 I I I I 1 1 I I I I - 1 1 I I 1 I 1 I I I I 1 1 I I 1 1 I I I 1 --r----1- 1--- T r r r 1 1 1 7 r r r 1 1 7 T r r 1 7 7 T r r), 1 -1--- 1 1 1 1 1 1 1 1 ,,1 1 I • 1 I F I 1 I .} t-L___f 1 •1 _ �`11y_ 1 1 1 „,_,1 _S`,h{,� ---�e��1 ..1 -1 ..i)E 11- .-1.LC1 1 1 ___r____T .-� T r r T1'R` - --1 -7- -r T"`- - '-f 1 7__T__.,.�_ r ___^ _1 --r--r-- 1 1 1 I 1 . I III I I 1 I Y/ 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I 1 I 1 1 1 1 1 III J�1 �'1 1I I 1 I III�/'I 1 1 1 11` 1 1 1 1 1 L =IL L7. 1-_.T I/2..(�1_c.i CL - __-_ r. L J J 1 L L I 1 1 I I I I I 1 I I 1 I 1 I I I I I 1 I I I I 1 I 1 1 1 1 I 1 , 1 1 I L J J 1 L L L J I I L L L I I 1 1 -I- L J J 1 1 L I I I 1 I I I , I 1 1 I I I 1 I I I 1 I I 1 1 1 I I I I 1 I 1 J. 1 L L J J J 1 L L J J 1 1 _--r-_L J 1 1 L I 1 I • I I I I I I 1 1 I I 1 1 I 1 I I 1 I 1 1 I 1 I I 1 1 I _._-I-- ti__4_-___4-_}__1-_-1_____J__4__4__; }__}-_L J--1__;__}_ -r__r_-__-1 1 1T1 // \ • I'. Ilk-1 _ , ir`Ft. 1I� 1 1 1 I 1 1 I 1 I 1 , 1 1 I 1 1 1 1 1 1 y__1_____7--r-_r--r-___1__y__1__7 t--r r 1 7 T 1 1 ,I 1 C 1 • f �`If/I'5 1 6,4, C I' -;.1'l)/ t ,/') 1 I 1 r----1--1---••�� r r - 1--�--1 r. ��r--.�- 11 y -1L z• :. rq r J, i 1 1' 1 1 1 ,1 � I 1 1 I 1 ..I 1 1 1 1 1 �t--`r .� 7 -i ii 1 1 1 I 1 , 1 1 1 1 , L I I 1 1 1 1 7 r r r 1 7 1 1 , "r•"'r 1 1 771T T I 1 T r r •------ I 1 ; i h 12 SL.Lf c4-s i L 1 1 I ; i 1 , 1 1 1 1 1 , ' , I 1 I II I I 1 . Houston and Associates, P.A. JOB �ONFs n SUBJECT Gi.4,,,,..../ /41+-._../;z.s CONSULTING ENGINEERS SHEET NO. OF 1 4918 Main Street Post Office Box 2927 CALCULATED BY 9h DATF 8/27,43/ Shallotte, North Carolina 28459 (919) 754-6324 CHECKED BY DATE SCALE I I I I I I I 1 I 1 I 1 1 1 1 I I I. I I I I I 1 I 1 1 I I I I I I I I I I I 1 I I I I I 1 ---r----y--'1-----t--r--r--r----7--ti--,--T r r--r ti--T- T--r r r----, T--Y--t--r-- I I I I I 1 I I I I I I I I I I I I I yy7� ��sI� I I It 1 IIII I I 1 I I I .I I I I ---r -`�"t�T-' T T r r 1 , , T r r r 1 T I 1 r 1 T T T r 1 I I I I �1 1 1 I I I I 1 1 I I I I 1 ---r--mC -4-tt•--IrL.��@h4__ CDY4414it. .l_Trk r r ,,_I i i T T L r T T r I 1 I I I I 1 I I I I I I I I I 1 I IIII IIII I I I I I I I - T:, r I I I 1 I T I I t 1 1 T L r J T 1 /`7d j 1/�.rl. 7'`�/�,J• fr c[[ M 3^1 /1 r. /1 r f5 ih }9a-ai/�a t R� C•o�i Nq`J 1 1 I 11 1 I I r 1 I 7 S I t/ A 1 I I 1 1 1 1 1 1 1 1 1 1 I 1 1 1 1 1 I 1 1 ___L____J__JI I I I-__" 1 L L I" 1I JI 1I I 1 I- II" I L JI JI I I 1 1 1... L 1 J J 1 1 L I I I I1 IIII I I I I I I I I I I ___L_J__J_1J�_Q_ s. J J J 1 L L L -II J 1 1 r__L__1__y J 1 1 L 1 I. I I I I I I I I I I I I I I I 1 I I I I 1 JJ ( 1 1 I 1 I I I 1 I I I I I�_ 1__i__i d�1 /i _I__I '__;__1- i r I__}_y J_-1 I__I_-I--_ ---1_--,___I_ ___ I djl� -- ---'lr /�_i L/,, +IR-ter--r I--i--4- i r 1--i--, ti--*--i--r-- I I 1 I I I I I 1 1 I 1 1 1 1 1 I 1 1 1 1I�(�'• I I 1 I I 1 1 11 ,1 11j�Qi1, 1 1 I 1 1 I ---r----1--T- - --Y e...C;- _l-„f-L1'f- T.-e- t T 1�i i r -r-1 T T 1 lilt I 1 I I _-- I 1 1 I I I I I 1 I I T r r r 1 1 1 T r r r 1 T T L r 1 T T r I I I I I I I 1 I 1 1 1 1 I 1 1 1 I I I I L I I I L J I I 1 1 T 1 r r 1 1 r 1 T T T T 1 r I 1 I 1 1 I I 1 I 1 I I I J 1 1 L L L J 1 1 L L L J 1 1 L J 1 1 L L i�- ..�� 1� I \Y.e 1. i c , o 1, I I l' D 1JT .�i CS 4L �- .� `� �0� I ) L 1 I I I I I I t f// 1 1 1 I -_------J__J___ 1 L L I_ J J J9' 1 2 L I- J 4 1 6 I I 1 ..t r__ _____I J 1 L L__ ___F____-I__-I____—IF-_}_-F__r^''r�J___--r4—4 4.d-,}s- - " -- -._y_ y . -I_-}__}__f__ I 1 I I •I i l Y o• S 7 Gi1 J "1- i i 1 ---1-----y--� *--r--r--r----'1--y--"-1 . r -r--r y- 1--*--r r r--I--, *--*--r--r-- I I 1 I 1 1 1 I 1 I 1 I i 1 1 I 1 1 1 1 I I I I I I I I 1 1 I I ---r----,--T-----T--r--r--r----T--,--T--T r r r - T r r r. 1 T__T__r__r__ I 1 I I 1 I I I I I I I I 1 I I I 1 I I I I I I I I I I I 1 I I 1 1 I 1 -r--r 1 1 1 1 1 ri, 1 I I I 1 I C,,� I I I �` �I I I r1 1 11.E �JL 1 1 _�y(�� /I1 /�I� „�•,1 �j� ---r----1--1--- 1k'-r •v_id_ir�scC._(#__ 1'•`J� r_ �1 - r-----111_1_. .e.T'-_Loran_r_LLr_- �.-- . I 1 I // I 1--7--r--r-- II � JIL _J CL vSl� 1 I ir_1� ,, je:�1�1�- 1+- -�I I L. L J 1 I I 1 1 1 1 1 1 1 1 I I I I 1 I 1 I I I I I 1 1 I I I I I I I I I I 1 L L L /Y}1 J I1/ 1 fff11IL1 L L �QL7�_�� J 1 1 1 L L J JI 1 1 J. L 1 I I #� lis8 1_ T J�' I -t- _ J.�•.ilil �.'t 1 1_ L J J ; 1 1 L ___L_J__J__1---__1__1__L__ ___ __ _ ___1.•_y__y__� k I '1 ,/I r 7 o O T F21 LV-' C /A4N FIc.D t,/. 2. I r-- --- --,--, CHANNEL IDENTIFICATION: NORTHERN SWALE @ 17 ' CONTOUR r-- FLOWRATE : 5 .7656E1 CFS > 5...c CFI 6--- CHANNEL SHAPE: TRIANGULAR J MANNINGS N VALUE : I SLOPE OF CHANNEL BOTTOM: .[;62 L-- SLOPE OF CHANNEL BANKS : .1 (VERT/HORZ) ; --1 -a--�--- DEPTH OF FLOW: .4 FT . VELOCITY: 3 .603513 FPS 1 1 1 1 I I I I 1 I 1 i IIII 1 I I I I I 1 1 1 1 1 1 I 1 I 1 I 1 1 1 1 1 1 1 1 1 1 I I 1 I ---r----1--T--- T r r r , -1 T T r r r I , 7 T T 1 r 1 1 T T r r 1 1 11Ak I 1 I I 1 1 I/ 1 1 I I '4- /� // 1 t Il`l%1 Y�;•'�.• F+1. K.'t 1..1 I�.r 1j •L `.I_ I J •� 1 Cr:Li" ?R_,S LI I` 1. 1 cJyl�+�r�-� T_{sap`4,1---r----1--'1-----r--r-- r- 1 T T r r '-' f_l -'S r-T--T-- , r r 1 T r- r 1 1 1 1 1 1 1 I I I / i I 1��1 // 1 I I 1 I l I I/ _ 1 1 I ZlTl Its S-K.44 1 tL'YSaLC' --../1 _j__J1L.?Tj_LI_ 110_.i _4 G',GS1•, .e- Ta.p1.4_ 1 I I 1 I I I 1 I I 1 1 1 I I V 1 I 1 I I 1 I I I 1 I I 1 I I 1 I I 1 I I I I I I I I 1 I I 1 1 I I 1 I I 1 I I 1 I 1 I 1 1 1 I I I 40- -7K 5. .c • Houston and Associates, P.A. :_,J3J F. :T CONSULTING ENGINEERS :-:,"i E T ._... 4918 Main Street Post Office Box 2927 ;-_,',.:_•..:Li I A T 7:". 7',-; `?9,-- - :i A T 7 iy28/47/ Shallotte, North Carolina 28459 (919) 754-6:324 rii--E. ED 3', ),.,T.--- 5,1,%_E . • • ' ' I ; ; ; ; I ; : • . . . . . . • ;- 4- I- ' -: ' ' 1 ; ; ; ; , r , ' I ' ' ' , , ; 1 , ; , , , , r r 1 -1 n -: . 1 , -, 7 7 7 I I t 1 r P41/ d 1 CS-)'G_I .._ _14_.,_•:4__i--Clu_ftse2e-_--,"--JR... ..__...,. , i 4 4 ' ; I I • L _1 - L L I_ _; _; i , . I_ , ..1 ! ,; : -4----- V--,‘L 442. 'f..01L_c_144.4-_. c_i,_r..;.,_f_,Zik L L._Z II___s-A,_ 4_,,,,irx : • _I I I I _ I • i I I i F,_j_ _;'_ ,_ '4 I " ' .I , I • • _,_ , J ,_ 4- 4 I1 , , • , ' .. , • , ; 1 •1 4A r4't-t-4 6'''., 4 _ 4 ! r. . 7 I 1 ! I I I , I I I i,. I • I I ! ; I ! I I i • -L • ' . j• I i . I I •, --, ',.. ',- CHANNEL IDENTIFICATION : GRASSED SWALE ALONG SOUTHERN PL BETWEEN CONTOURS 15 ' & 16 • FLOWRATE : 10 .44707 CFS ' CHANNEL SHAPE : TRIANGULAR MANNINGS N VALUE : .03F, SLOPE OF CHANNEL BOTTOM : .013 SLOPE OF CHANNEL BANKS : . 1 (VERT/HORZ) . _ . DEPTH OF FLOW : .67 FT . ---—1 VELOCITY : 2 .327261 FPS • • , . • :• . . . . . , --!-- --, - ----. : . . , - ' - ' - - ' • :• . . . . . . . • . .,..... ' — _______..... • Houston and Associates, P.A. JO5 DO A/ES 7175-M2 b /:,s CONSULTING ENGINEERS 5.--i E•E I ::1_. 07 4918 -Alain Street Post Office Box 2927 ::..A.L7 .! i,T 7_:: :-.,• 9P-n-e_.- -..)/•-.1-7 z9/2")/5/ Shallotte. North Carolina 28459 (919) 754-6324 :_---17_::::-• :"..) ET!..'• :-.)I.T 7 , • . ' I , • I i I 1 I I 1 -I 7 t7- -:- -I -: 7 : I. „7 1 1 7 71. 7 . . -; • -- I 1 1 I I 1 1 I : 1 . . 1 i 11.C" 44. /IC 4,-..".ilit_g:nil__L__ ' 1 : • I : LLL - i _ ,_ J ! Jj . ' LL JJ - L •- ._ ,' 1 ' __:._ ....J ; :-- •2-1_-:-.2,_ 0!f_cP:_2_* i-2-sli ._f .r_is....,=,..-".1-e__fl' -1- -i..-=t,-A/-'f-r-1-7,-=',-- ).---,'.--•-i , , _ • , , • .4' ' , • 1 '_r—ei • ;It : — ' ' "i:v.r A'- )fb-Irz-V-6-it-, , , • 47::"rR/,,,r-ou, /-- e- /-,, ,.: -H- ---- ... ., 7-7- r CHANNEL IDENTIFICATION: PAVED SWALE ALONG SOUTHERN Ft -- ____ ----- - - FLOWRATE : 11 .01 29 CFS ) /,0,14.- C-F"1 CHANNEL SHAPE : TRIANGULAR . MANNINGS N VALUE : .015 . : : SLOPE OF CHANNEL BOTTOM: .01P r SLOPE OF CHANNEL BANKS : .05 (VERT/HORZ) DEPTH OF FLOW: .39 FT. L . VELOCITY : 3. 46251 FPS ;---7- • , ‘ , . • . " ; :- -1- 7 I • , . • : . '' • ' , -.- , : • 1 , • . • . - ' . , ;" Ic-1-..ko.,a-r_f 4-7'it '_.-.c.'--F- ! ' . .._ _. __ ...„.9_eed ..c.-6,.7.,'id _,..."-- ,;.-..,a_ral.... . • . _ . . . . . . . . - . - - - . _. .. .. . .. . _ _ . . . _ .. . .. . . . -. . . . . .. . .. . . . . . . .. . . . . . . . , - . __. ....... .... . ._. A' ___ . _,., f''''' 01 4 & I -I, \ I i . 1 .1 -,3\ bl I A- c•al ci 1 d 1 •.. \ 1 I i , : .., .4 . _:. I, , 1 + lk 1 i 4 Cr t'l 11) t I/ --- 1 I) 1 I • / i i I U / V ! 4 .11 1 C.5 nj 1 0 Vi. 1 "...i I I / 1 i I , / 11' -- ----11 . , 1 - I Houston and Associates, P.A. ?°i,e r #--tiv d CONSULTING ENGINEERS 5H_=T 4491S Main Street Post Office Box 2927 '�ALC1J_A.T `nwl- -. `•.T- V I/a r Shallot.te, North Carolina 28459 (919) 754-6324 =`=:.-.=_, DATE. • 1 I I I I I I 1 I I i I I r I , , r I , , -' -- T r 1 , I : I I I I I I I I ' 'I r J I I I I I I I I I I I : S !,. ,L r 'rt,^ u L-6 ri,_ . L——'•_,?1:.Y e_i_zJ J.-2 J I.LICA. 'fit-_�`-4G J i -- I I I I ; I I I I I I I 1 1 I I I 1 1 I I J 1 J • , 1 ! : L I 1 I 1 I 1 , , I I 1� I , , 1 : —: I / : : •1 j , I 1 I I; I afII I1^' , .. +I I E C,V- ! yr 1 1 1 , ce I f.' ' � I , I , 1 1 I i . : I I 1 1 I I I i , i 1 ;, I' 1 PROJECT I .D . - J ONE it FORD WET DETENTION POND • 1 , DES I GN FLOWRATE = 20 .O CFS —' ---'--- RISER DIAMETER. . . . 3 FT. RISER ELEVATION . . . 1 6 . 1 FT . - ' CULVERT DIAMETER . . , 2 FT . CULVERT LENGTH . . . . 40 FT . • INVERT-IN 14 FT . _ INVERT-OUT 13 . .FT - --- TA I L.WATER ELEVATION . . . 0 FT . -_ - COMP'UTED WATER SURFACE ELEVATION BASED ON _I INLET CONTROL 16 .S0279 FT . OUTLET CONTROL 1 EI . 10272 FT . - E WEIR FLOW 16, .7t;209 f=T . HIGHEST ELEVAT I ON COMPUTED I S THE ACCEPTED ELEVAT I ON . ( IF KNOWN TAILWATER SUBMERGES OUTLET , IGNORE INLET CONTROL VALUES . ) 1(/I1,•{ vrti.>M ' cy �r;n 47 u.lr_- 14-a Rotw.. S7�j'tM 7, A_ Fw illus�tr �er As- et d k r, ►r t -C kJ 61. 1�. Z-i v 1 re.I 2. -to S rdatf DONE 'S FORD WET DETENTION POND DON C . 9/5/91 VOLUME OF RUNOFF FROM 1 INCH RAINFALL : 10500 CF STORM WATER REALEASE METHOD : ORIFICE ELEVATION OF NORMAL POOL (BOTTOM OF ORIFICE) : 15 FT . MSL DIAMETER OF ORIFICE : 1 .5 IN . SURFACE AREA OF POND AT NORMAL POOL : 9450 SO . FT ELEVATION OF POOL AT DESIGN STORAGE : 16 . 1 FT . MSL TIME INCREMENT FOR ROUTING: 2 HR . TIME ELEV . HEAD FLOWRATE TYPE FLOW VOLUME END ELEV _? 16 . ]. 1 . 1 .06 19413 ORIFICE 445 .9774 16 .05281 2 16 .05251 1 .052807 6 .059799E-02 ORIFICE 436 .3055 16 .00664 4 16 .i _6f:4 1 .001;63s 5.92543E E-02 ORIFICE 426 .6315 15 .96149 F. 15 .96149 .9614906 5 .791059E-02 ORIFICE 416 .9548 15 .91757 in 15 .91737 .9175679 5 .656603E-02 ORIFICE 407 .2754 15 .87427 1015 .87427 .8742695 c .52 2129E-=c ORIFICE 397 .5932 15 .8322 83r c n 7 n � 15 .8322 .u,=, 1'a5� L�.a� rF'.1aE-�?� ORIFICE 387 .9035 15 .79115 14 15 .791 15 .7911473 5 .255062E-02 ORIFICE 378 .2205 15 .751 12 7c 35 c + n 368.5294 1.F, 15 .75112. r_�1 12ti:, •_� . y 1�r?f=�k•E-•C?2 ORIFICE 15 .71213 58 n3n 35' SSS 1,:_; 15 . 71213 r 1212L�,� 4 .'�v.�.�1'�E-i=?2 ORIFICE ,�•_�:1 .:.�.-.,�_� 15 .67415 20 15 .67415 .6741543 4 .849127E-02 ORIFICE 349 . 1371 15 .63721 22 15 .63721 .637209 4 .714353E--02 ORIFICE 339 .4356 15 .60129 24 15 .60129 .6012898 .57 9 5 8 2 - 0L U I C _ 329.7299 15 .5664 �1 E 320 .02 26 15 .5664 .5663977 4 .4447r_�F--t i2 ORIFICE 15 .53253 2n i r .592 5�, .5325327 r .n t9799E-r2 ORIFICE 31 C .:i5_ _ 15 .4997 30 15 .4997 .4- =N•.=c r .0417481 ORIFICE 3 .5 8 6 a 15 .4673q 32 15 .4E 789 .4673:879 4 .039752E--02 ORIFICE 290 .8621 15 .4 /1 1 3 i= -;•'7 •"t^7 0 o 3 1 ' 1 3 2 c 1 s., � 1.., ,4.., . ]. :� ,4:�: r ]..�'_-� ,:,=,':•rt�?�Fr-,,._ t:i!�° l'F I CE 2�:�1 . ,....,r 1.� .'-L;_? , 3F-. 36 1 5 .4.0786 .1073591 3 .769403E 02. ORIFICE 271 .397 1 .3 ?8r'4 32 15 .3734 . . r 2E.338 OR:I F .. ,6 .G 75 L 5 .350`7. -'_! _,509502 .'1_.:498 ;' OF:`i.F' I L. 44 15 .29867 .2986689 3 .227594E-02 ORIFICE 232 .3868 15 .27408 ^ 46 , 15 .27408 .2740774 3 .091865E-02 ORIFICE 222 .6143 15 .25052 48 15 .25052 .2505207 2 .956009E-02 ORIFICE 212 .8326 15 .228 50 15 .228 .2279987 2.820007E-02 ORIFICE 203 .0405 15 .20651 52 15 .20651 .2065125 2 .683842E-02 ORIFICE 193 .2366 15 ' 18606 54 15 . 18606 . 1860638 2 .547504E-02 ORIFICE 183 .4203 15 . 16666 56 15 . 16666 . 1666546 2 .410974E-02 ORIFICE 173 .5901 15 . 14829 ' 58 15 . 14829 . 1482849 .0227422 ORIFICE 163 .7438 15 . 13096 60 15 . 13096 . 1309576 .0213722 ORIFICE 153 .8799 15 . 11467 62 15 . 11467 . 1146736 1 .999934E-02 ORIFICE 143 .9952 15 .09944 64 15 .09944 9 .943581E-02 1 .862324E-02 ORIFICE 134 .0874 15 .08525 66 15 .08525 8 .524704E-02 1 .724343E-02 ORIFICE 124 . 1527 15 .07211 68 15 .07211 7 .210923E-02 1 .585913E-02 ORIFICE 114 . 1857 15 .06003 70 15 .06003 6 .002617E-02 1 .446952E-02 ORIFICE 104 . 1806 15 .049 72 15 .049 .0490017 1 '307343E-02 ORIFICE 94 . 12868 15 .03904 74 15 .03904 3 .904057E-02 1 . 166922E-02 ORIFICE 84 .01841 15 .03015 76 15 .03015 3 .014946E-02 1 .025472E-02 ORIFICE 73 .83396 15 .02234 78 15 .02234 2 .233601E-02 8 .826462E-03 ORIFICE 63 .55052 15 .01561 80 15 .01561 .0156107 7 .378958E-03 ORIFICE 53' 1285 15 .00999 82 15 .00999 9 .988785E-03 5 .902558E-03 ORIFICE 42 .49842 15 '00549 84 15 .00549 5 .491257E-03 4 .376428E-03 ORIFICE 31 .51028 15 .00216 86 15 .00216 2 . 157211E-03 2 .743028E-03 ORIFICE 19 .7498 15 .00007 88 15 .00007 6 .67572E-05 4 .825397E-04 ORIFICE 3.474286 14 .9997 ' Houston and Associates, P.A. JOB 1.)--4H0'J ? rn( SUBJECT 4.,),.-0- ).,°*!..-lie. '.> a CONSULTING ENGINEERS SHEET NO. OF 4918 Main Street Post Office Box 2927 CALCULATED BY (- e DATF `7/s/51 Shallotte, North Carolina 28459 (919) 754-6324 CHECKED BY DATE SCALE 1 1 1 1 1 1 I 1 I 1 I 1 1 I 1 I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 r 1 1 t r r r-- -1-----1--r r r--r ti--� -r r r 1 r r I I I 1 1 I I I I I I I I I I It IIII II I 1 I II 1 I r 1 1 T r r r 1 1 1 T r r r 1 1 T r 1 r 1 1 T r r I I I I I I I I I I I I I I I I I I I I 1 1 i I I I i LI rI 1 T T II r 1 1 T r rr 1 1 1 1 r- r r 1 1 1 T I E_✓�ts (,`__ �,_ ;L1r I I I I 1 1 I 1 1 1 1 1 I 1 1 1 1 I I I 1 I I , 1 1 1 , I I I I 1` 1 1 1 1 • I 1 ` ___L____J__ .G.__1'!=1_ L ' wi_JikvJis.-A.Z.a._s)L(__i1c�_1+..rrk,- 1+ g4i4S- a1'r�j.e--4-041-f-e__--- I I I I I 1 I I I 1 , I 1 I 1 1 1 1 I I 1 1 IIII 1 I I i I I I I I I 1 I I I I I -_-IL _-I-_J__J/_,_t_ 1 1 L Li J J 1 1 LL _/L /�1- I J1 .,1 1 �.11.� L r__JL__I---a J 1 1 L i III - Ur.-a1 {i0il-lhd..-�F- .. I►- --1.J.�r actY.1--0_I-'P_r_ A.L +-41.--.F. F�1�-ti 1=-;--+--L ---1---I- �- 1 1 1 I 1 I I I I I I 1 1 I IIII 1 I I I I I I I I I II- 1 I I I I 1 1 I I I I 1 I 1 I 1 I I I ---I---I---i----1-----}--r--r--1--- --I--------1 r--r--r I -I--y--t--} r r-y 1 y--r--r--r 1 _L I I I I I 11 1 I / I I I I I y I 1 1 I 1 1 I I I f _ 1 Q` O ' I ()hA I- 1 1 h 1 1 4 1• I 1 I I I 1 I 1 1 1 1 1 fI 11 Irk 1 1 1 i 1 1 1 1 I 1 1 i 1 1 I I I I 1 I 1 I I I I 1 1 I I I I I 1 ---r-1--1--1--- Ti r ri r 1 1 1 T r r 1 1 1 7 T r 1 T r r _I,], I �7rr ,c I I I -��-f �.,,[�- I r I 1 �I I I I --r- --1 -1-- --T--`'�''�'r -1="LICI - 17--Air__ r-4- --'-'-l'1li-4c---7�'� =-1-;=-'y-L..; '--r--r I I I i I I I 1 ' v 1 1 I I I I I. I I , 1 , L J , , 1 r r , I T r 1 1 I I r 1 I I 1 I I I I I 1 1 I. I I I I L J J 1 L LX_tt1 . CJ- J��.1 -LL1/ 11L.e.--tit.�tJr ♦ t_•1�dL . e_ Is_JJrJ•_We-1_-1__I__L I I 1 I I 1/-1 1 I 1 1 I 1 1 1 I I I 1 I I 1 I 1 1 I 1 I 1 • I - 1 . I I i I 1 I 1 1 1 11.y) %i 1 - r�/I 1 ,I ♦ 1�j/y/�!I 1 1 1 1 1 L J J 1 1 L l...- • �JJ� --r eesi_L , _/_J✓ L S,_ 1 �/]�I. av 1r 1 1 91 .� 1 J.r--1-- +E�IV-�-_ lI+CJ_- 1I--L--L I 1 I I I I ' I 1 I I I 1 1 I I I 1'--,---� -1--1--;--+ r I-----1 I I _ 2 I I I I 1 I 1 I I I -r �T_�~ Y- -r_-fR r -- �.1--y-_4__} r I-----'1 y__t__r_-r I 1 I I 1 I I I 1 1 I I 1 I I I I I I I I I I I I -1; 1 1 t r r r 1 1 1 r r r 1 1 -II I I 1 I 1 I I 1 I I 1 r I I I 1 ; 1 141 1 I i I I I 1 ' I I _ I �'@ I 1 i _ 1 1 I I /f [y 0 I I I y t I 1 1 I l ---7--r-- 'r- -C'�--'1-�-j--7-- r--r- T J+�- 1 T L r 7 T r I 1 I I I I 1 I 1 --�I-7ZI I Ti 1 1 L 1 I I 1 1 I I I 1 I - L J I I 1 1 1 1 I I 1 I I 1 1 1 1 I 1 I 1 1 I I I I I I I 1 1 I 1 J Jt I I J 1 LI LI L JQ_` I 1 I I 1 --1L 1 1 L J 1 L I I I I I I I 1 1 . IILr I , 1 1 I J J J 1 L L L //// �1 1- _— L J 1 1 1 L I 1 1 I I I I 1 1 )j eJ(O,I0 a- I I I ` I I t • 1 1 1 1 I 1 1 1 1 1 1 1 1 1 1 I I I I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I I I I 1 1 I I I I 1 I 1 I 1 I 1 I / I I 1�1,,, 1 I I I 1 1 I I I I I i Ia�p' I �I,I 1 I --r 1 -- }--r- r--r- -1- -�- y II---r--r -�t - -t-yf-•Ir-6r-- (--1w-�yt��y��r--r-- 1 I I I I 1 I I I I I I I 1 Jam] �f) I I I I I ! I I I 1 I i I I I 1 1 1 I I (I��_�,/(Li:a All' `'� + r--r-- ---r----1--1-----T--r--r--r-- -1--1--1--t---t r r r 1 7 �f �r All' 71 4CJ� I I I 1 1 1 I I I I I I I 1 1 I I I I I I I I 1 1 I 1 I I I I I I I I I r 1 1 T T r r 1 1 1.1 r r r 1 1 1 'r --I�� I �@ d" 1 I 1 I 1 I I I I I I I I I I I 4 I 1--- - --' 1 1 I 1 1 I I III I 1 1 1 / dd t.14 y .I I 1 I I- 1 1 1 1 1 1 f /t r ��-1 (`�� "�'LI �'�Ij 1 1 1 1 1 I 1 1 1 1 1 1 1 A y 1.� ,,nn r`. /1 11 1 1� J J 1 L L L J J 1 L L L J J 1 11 b.J5-L_at'_Pell_==_LDJ!�}L-_ 'k�[ l,. 1 I I I I I 1 I 1 I 1 I 1 I I 1 I 1 I I 1 I I I I I I I ___L____J__J___ 1 1 L L J J 1 L L L J J 1 1 1 I I I I I I I 1 I I I 1 I I I I 1- L J J 1 L 1 I I I 1 I 1 I 1 I I I I I I I 1 I I I I I J L 1 1 L i L I I I I •-1__J__1_-1__�._ L � J 1 1 L I I 1 I I I I I 1 I 1 1 1 1 I 1 I 1 I I ' 1 1 1 1 _--�'----J--1-_---1-_+--L--L- I I I I 1 1 1 1 1 I I 1 1 1 11 . 1 . 1 • I 1 r �. �0.�Ih,.L, - "i., .. 7'• , Afr)4— 1 r�.. i 1I 1 11 I 1 I I I` I I I / 1 1 1 1 1 i - 1 I 1 1 1 1 1 I 1 1 1 ---r----1--1-----t--r--r--r-- 1 1 1 t r r r -I---1--- r r r 1 7--t--r--^-- I I I 1 I I I I 1 I I I I I 1 1 1 1 1 1 I I -r----1--1--- T r r r 1 1 t •�r r r 1 1 T T - 1 r 1 1 T r r I I I I I I 1 1 I I I I 1 I I I 1 I 1 L I 1 '1--""1-""--T T r r l 7 r r r 1 1 T r 1 T r r I I I I 1 I i I 1 I I I I I I 1 L I 1 I I 1 I I I I , I I I 1 I 1 I 1 1 I I I I I I I 1 I 1 1 �]r1. �� °� Associates, �� /k 'u�c��m�� u 'u .z�� 3J T e-jm�+-]be`L, 4-ip~ CONSULTING ENGINEERS 4918 lhuin Siroot Post []ffico 8ox 202T ��-'-^-z T= � Shulloiie, North Carolina 28459 (9I9) 754'6324 _ | PROJECT I .D . r JONE 'S FORD RISER CAPACITY A HEADWATER @ 17 ~3 ' �— 'T . DESIGN, FLOWRATE = 23 CFS | —� RISER DIAMETER . ' � . 3 FT ^ | . -- L RISER ELEVATION . . . 16 . 1 FT . | CULVERT DIAMETER . . . 2 FT . -- CULVERT LENGTH. . . . 40 FT . - -- ' ._` INVERT-IN . . . 14 FT . � INVERT-OUT 13 .5 FT . - -- --^ . _ —'� TAILWATER ELEVATION . . . 0 FT . -_ --' _ � COMPUTED WATER SURFACE ELEVATION BASED ON : —� INLET CONTROL 17 .31424 FT . ' — OUTLET CONTROL 16 .50066 FT . — --` WEIR FLOW 16 .81957 FT . _ -- HIGHEST ELEVATION COMPUTED IS THE ACCEPTED ELEVATION . ( IF KNOWN TAILWATER SUBMERGES OUTLET , IGNORE ''- INLET CONTROL VALUES ' ) _ �. �� `('� .^