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Home My WebLink About54-01 RESOLUTIONRESOLUTION NO. 54-01 • A RESOLUTION APPROVING AD 01-13.00 TO ADOPT THE DRAINAGE STUDY FOR FLOODPLAIN AND FLOODWAY DELINEATION FOR THE UNNAMED TRIBUTARY (MCT -3) TO MUD CREEK AT CMN BUSINESS PARK II, PHASE II, PREPARED BY HOLLOWAY, UPDIKE AND BELLEN, INC. FOR MILHOLLAND COMPANY, DATED SEPTEMBER, 2000 BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF FAYETTEVILLE, ARKANSAS: Section 1. That the City Council hereby approves AD01-13.00 to adopt the drainage study for Floodplain and Floodway Delineation for the Unnamed tributary (MCT -3) to Mud Creek at CMN Business Park II, Phase II, prepared by Holloway, Updike and Bellen, Inc. for Milholland Company, dated September, 2000. ' PASSED AND APPROVED this /7 day of April, 2001. ATTEST: By eFtiAlt/ eather Woodruff, City Glrk APPROVED: By: • NAME OF FILE: Resolution No. 54-01 • CROSS REFERENCE: 04/17/01 Resolution No. 54-01 Sept/2000 Drainage Study for Floodplain and Floodway Delineation Mud Creek Tributary CMN Business Park II, Phase II, Fayetteville, AR 04/17/01 Staff Review Form 04/24/01 Departmental Memo from City Clerk NOTES: RESOLUTION NO. A RESOLUTION APPROVING AD 01-13.00 TO ADOPT THE DRAINAGE STUDY FOR FLOODPLAIN AND FLOODWAY DELINEATION FOR THE UNNAMED TRIBUTARY (MCT -3) TO MUD CREEK AT CMN BUSINESS PARK II, PHASE II, PREPARED BY HOLLOWAY, UPDIKE AND BELLEN, INC. FOR MILHOLLAND COMPANY, DATED SEPTEMBER, 2000. BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF FAYETTEVILLE, ARKANSAS: Section 1. That the City Council hereby Approves AiP01-13.00 to adopt the drainage study for Floodplain and Floodway Delineation for the Unnamed Tributary (MCT -3) to Mud Creek at CMN Business Park II, Phase II, prepared by Holloway, Updike and Bellen, Inc for Milholland Company, dated September, 2000. PASSED AND APPROVED this day of April, 2001. ATTEST: By: Heather Woodruff, City Clerk APPROVED: By: DAN COODY, Mayor • DRAINAGE STUDY for FLOODPLAIN AND FLOODWAY DELINEATION MUD CREEK TRIBUTARY CMN BUSINESS PARK II, PHASE II FAYETTEVILLE, ARKANSAS Prepared for Milholland Company hdo 444 itikg4 4 Holloway, Updike and Belien, Inc. Consulting Engineers Muskogee - Tulsa September 2000 00 •gt,;‘ orestriearecr / A II S * * RECI•Te PROP,ESIIONAL 41 INEER * * No. 9675c, C Ce?sic \8A,W0 Dr HOLLOWAY, 'DIKE AND BELLEN, INC. 818 East Side Boulevard Post Office Box 1543 Muskogee. Oklahoma 74402 (9th) 682-7811 ENGINEERS (918)�824551 Fax October 25, 2000 Brock Hoskins, P E Garver Engineers 3810 Front Street, Suite 10 Fayetteville, AR 72703 • Max Holloway Jay Updie Bruce Bollen Joe Reid Tony Eadrigs Gaikb Hiebert Greg Armstrong Re: Drainage Study for MCT -3 CMN Business Park, Fayetteville, Alt Dear Brock: Enclosed are nine copies of the final Drainage Study for the referenced project. Included in Appendix A is a Floodplain and Floodway Plan Sheet showing the 100 year Floodway and Floodplain Boundary. The 100 year flood elevation just upstream of the Shiloh Drive Bridge Box is 1205.34 versus 1205.05 from the TWH Consulting Drainage Study. A comparison of the 100 year flood profile from this study with the TWH study is included in Appendix B along with the Q25 and Q100 freeboard at Van Ashe and Shiloh Streets. If you have any questions or require any additional information, please call. Sincerely yours, HOL OWAY, UPDIKE AND BELLEN, INC. Terry Eddings PE Vice President TE:tbp 005070 Enclosures TABLE OF CONTENTS DRAINAGE STUDY MUD CREEK TRIBUTARY 1. Introduction 1 II. Methods and Assumptions 2 III. Results 2 TABLE 100 Year Ultimate Developed Floodplain and Floodway Data Chart APPENDIX A APPENDIX B DRAINAGE STUDY FOR FLOODPLAIN AND FLOODWAY DELINEATION MUD CREEK TRIBUTARY CMN BUSINESS PARK 111, PHASE 11 FAYETTEVILLE, ARKANSAS INTRODUCTION: The purpose of this study was to determine the 100 year floodplain and floodway for the unnamed tributary (MCT3) to Mud Creek which flows across the CMN Business Park II, Phase II. Previous studies by Milholland Company dated December 1998, Garver Engineers dated May 1999 and TWH Consulting dated October 1999 were utilized for this study. The following tasks were completed for this study: A Verified and utilized drainage areas and previous estimates of runoff from TWH Consulting study. B. Verified elevation and structure data to ensure continuity between plans, previous studies, survey and hydraulic model. C. Developed DTM and contours along MCT3 using surveyed cross sections. D. Developed HEC -RAS model of MCT3 from survey data (September 2000) E. Mapped boundaries of the 100 year floodplain and floodway. II. METHODS AND ASSUMPTIONS: HEC -RAS Version 2.2 was used for development of hydraulic models. Peak flows from the TWH Consulting study were used for this model. Downstream starting water surface elevations were taken from the Garver Engineers study using the Effective Existing Condition model. Surveyed cross sections of the completed channel, taken in September 2000, were used for this model. Due to planed Stream Enhancement Mitigation, higher roughness co-efficients were used to reflect the planting of trees in the overbanks and placement of rip rap in the channel. Project Stationing begins with Station 0+00 at the centerline of Mud Creek. See • • • • 1 Appendix A for Floodplain and Floodway Plan Sheet showing cross section location and stationing. Appendix B contains a comparison of this study's cross sections with the TWH Consulting HEC -2 model cross sections. III. RESULTS: A summary of 100 year water surface elevation along with floodplain and floodway widths is presented in the following table: 100 YEAR ULTIMATE DEVELOPED FLOODPLAIN AND FLOODWAY DATA River Station Station 'ID ' 100 year VVSEL 100 year flood plain width Flood way Width 100 year WSEL w/ EncrOaph Change , VVSEL in 175 1 1187.50 390 124 1187.50 0.00 185 2 1187.50 367 138 1187.49 -0.01 375 3 1187.68 192 54 1187.75 0.07 535 4 1191.18 40 40 1191.17 -0.01 705 5 1194.27 180 56 1194.58 0.31 965 6 1194.60 142 142 1195.26 0.66 1100 7 1196.48 152 64 1196.32 -0.16 1250 8 1197.50 164 61 1198.30 0.80 1400 9 1199.82 102 32 1200.60 0.78 1550 10 1205.34 88 88 1205.34 0.00 WEST BRANCH 1585 10.3 1205.23 63 1610 10.5 1205.53 73 EAST BRIINCH 1625 10.2 1205.65 88 1650 10.6 1205.95 50 100 YEAR ULTIMATE DEVELOPED FLOODPLAIN AND FLOODWAY DATA 1 • • APPENDIX A 1 HEC -RAS OUTPUT TABLE HEC -RAS PLOTTED PROFILE HEC -RAS PLOTTED CROSS SECTIONS • FLOODPLAIN AND FLOODWAY PLAN SHEET 1111 1 1 1 1 1 1 1 1 1 1 1 NI 1 1 1 1 1 • • 0 t c CO J WS 100 year WS 100 yr w/ Encroa • Ground a a • • to" 0> 121 121 121 121 12 12 12 12 12 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 10.5 05 .06 1216 1214 Station (ft) Legend WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta 50 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 10.3 5 .1 06 1 !L. 1212 1210 1208 1206 1204 1202- 1200 • A 1 1 egen WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta 1198 960 980 1000 1020 1040 1060 1080 1100 1120 Station (ft) , L6 1 ,- 1 1 L • 1 1 1 . . 1 1 1 1 / L L J1 / 1 r— 18 t 1 1 , 6 11 • 1 1 111 1 1 1 1 P 1, 1 1 mt. 4_, 1 , ' 11 , . 1 1 _I 1 ' , , . 1 1 1 , . )0 ....... 1. . 1 1 .‘ 1\ 1 1 $ 1 1 1 1 1 1 1• . . . . ...._ . ....... • • • .....-. . . . . . ...... 1216 1214 Station (ft) Legend WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta 50 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 10.3 5 .1 06 1 !L. 1212 1210 1208 1206 1204 1202- 1200 • A 1 1 egen WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta 1198 960 980 1000 1020 1040 1060 1080 1100 1120 Station (ft) • • 121 121 121 a) 12 12 12 1 1 1 1 1 1 1 1 1 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 10.6 06 )'.. 05 .06 J V OILIV I ULU Legend WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta it/60 Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 10.2 .05 06 214 • • ar NI - r• \:_ 1 1 1 7 _1 J 1 -1 1 L I 1 i 1 .•. 1 1 LLL I i • i 1 1 1 1I Legend 1 J 1 I J 7 J 1 1 1 I 1 0 18 r L r r i i J 1 1 i J -1 J I i 1 i I 1 WS 100 yr w/ Encroa J 210 1 1 1i 1 it -1 J J 1 208 16 • 14 1 r P 1 1 r 1 , 1i 1 I 1 1 t i 1 1 Z1 1 t i • •• r 1 1 , 1 i i *1 i , \1 r• . 1 7 \ \1 - \ Jo • 1 , 1 1 I , 200 i 1 Onll Ann • AAA ncn non 4 nnn • Ann 4 n 4 n • n J V OILIV I ULU Legend WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta it/60 Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 10.2 .05 06 214 o 6 1 L I 1 i 1 .•. 1 1 LLL I i • i 1 1 1 1I Legend WS 100 year 212 , 1 i L 1 1 i WS 100 yr w/ Encroa Ground Bank Sta 210 1 1 ••••• i „ 208 1 1 1 , , 206/'. i 1 1 I 1 I 1 I • s, . 1 1 , 1 i i 204 i , \1 1i . 1 202 \ \1 - \ • 1 , 1 1 . 1 i 1 , , 200 , . 7 1 , . __,,.....L.. -a-,,..._. / • 1020 1040 Station (ft) 1060 1080 1 1 1 1 urn • • 12 12 12 12 12 12 12 12 12 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 10 05 .07 14 •'‘ _I i 1 1 i 1r • i J ' • ' \ • E • • $ $ . $ $ )8 )6 . . $ $ / . -• . • r • • • . . . . . )2 DO)4 , 1 . $ ' . . . I ! einn nA n non non • nnn 4 nnn • nA n n non inert 44 1216 1214 1212 1210 1208 1206 1204 1 202 1200 920 940 960 980 1000 1020 Legend WS 100 year WS 100 yr w/ Encroa • Ground • Bank Sta 0 Station (ft mud creek flood study - Sep ember 2000 Plan 08 10/23/00 RS = 9.5 07 --)k .05 07 ---30 Legend • • WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta Station (ft) • 040 1060 1680 1100 • • 1208 1206 1204 1202 1200 1198 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 9.5 07 .05 ).!< .07 Legend WS 100 yr w/ Encroa Ground • Bank Sta Encroachment 850 900 950 1000 Station (ft) 1206 1204 1050 1100 1150 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 9 07 >4( 05 )2.< 07 I I I I I 1 I J. • I I I I 1202 • 1200 r r I I I , 4 CO 1 J. O 1.1 1.1.1 1198 1196 L r r t et I P - - I I I _I I. I I 12- I I I I I A L T I i L 1 1 1 I I F - 1-/ •••• r 1 1 4 1 1 i i 1 r i1 L fl r 1 r i i r r 1 T Legend WS 100 yr w/ Encroa WS 100 year Ground • Bank Sta Encroachment 1194 850 900 950 1000 1050 1100 1150 Station (ft) • • 0 uJ 120 119 119 119 119 119 12 12 12 11 11 11 11 11 11 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 8 07 )t.( 05)4 07 Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 7 08 'It .06.4 08 12 1 r. . r _I 1 J • _I J 1 1 1 1 1i , 1 1 1 1 1 , , —• ws 100 yr w/ Encroa 10 1 p 1 L 1 1 1 i i i1 WS 100 year 1 1 1 1 1 1 i 1 1 • • 1 1 1 J. , , • 4 Ground • Bank Sta 1 I 1 . . i r\I 1 I _I Ground 5• 1 11 I 1 1 " 1 1 1 [ i r ' 1- _, I I 1 r \ , \ 1 1 I 1 1 - 1 I,_ L I / 1 1 , , 1 • Bank Sta , r 1 J 111 Encroachment 1• 1 1 1 1I i 1 1 1 1 1 1 • 11 ; ; 1 1 , 1 1 1 1 1 r ; ; ; I 1 1 1 r 1 • ; I 17 I '.-------• J ; ; ; 1 p I • 1 I 1 P 1 ; ; •1 i I 1 1 I , , , , r 1 r ; 1 1 ) 1 •I ; n• t l- i 1 1 1 i 1 I 1 . 1 1 1 1 : : HI 1 1 1 i i ir 1 111 1 • 1 1 1 1 1 I 1 1 I I 1 1 1 n . • 1 r • 1 i I 1 a 1 1 7 i I I 1 1 1 1 I 1 1 1 1 . I I 1 1 I r 1 i 1 1 . , 1 ) 1 1 • 1 1 1 •. 1 1 I 1 I 1 1 1 . 1 1 1 -r - 1- -I iii 1 1 iii I l 1• •. . I 1 I 1 • 1 i 1 1 1 1 I 1 I • 1 1 J 1 [ 1 1 1 m i 1 1 1 I I I 1 i 1 r I 1 1 1 I s -1 1.- i 1 i o cn nnn ncn 4 nnn 4 ncn 44 nn 11 CA Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 7 08 'It .06.4 08 12 1 • , % J 1 i 1 1 1 I 1 1 1 L Legend WS 100 year 10 • i • • 1 1 1 J. , , WS 100 yr w/ Encroa 4 Ground • Bank Sta 18 16 14 _I 1 1 , • Encroachment \ \ 1 \1 . . 1 1 1 1 i 4 1 1 1 1• 1 6 , 1 1 1 1 1 1 L, I I1 t I 1 1 I1 111 •_., 1 1 1 1 11 I 12 , I I i'.....& I 1 1 1 I r 1 1 Q‘ , . J , • , I 1 1I • • • • • • I I , • • P I 1 • F I • I I , 1 1 i I 1 1 1 I I i ' I 1 1 . I I I r . I 1 1 1 1 1 1 1I 1 I 1 & - . - Station (ft) • • 120 120 119 119 119 119 119 118 118 mud creek flood study - September 2000 Plan 08 10/23/00 RS=6 08 ok .06 I . • ' • ' •1 " 1 1 . , i 1 1, 1 . P 1 r _ I I I 1 1 1 1 " • 1 1 P1 I I 1 1 1 1 " • • 1 1 1 I I i 1 i 1 egen • WS 100 yr w/ Encroa WS 100 year I1 1 \ • i 1 .1 1 , ' i 11 ' ' . 1 I 1 . 1 I 1 1 I 1 • Ground • Bank Sta i , 1 1 1 1 1 1 1 1 1 1 1 . 1 P i 1 1 1 1 1 1 i 1 1 il • 1 1 1 1 1 1 • 1 1 1 •----1, 1 1 1 1 .1 1 1 1 1 1 1 1 1 1 1 1 1 1 P I I i 1 I • 1 1 I 1 I 1 I I 1 $ 1../-...................r........-.-1 r I I 1 1 I I I I I 1 ) 1 1 1 I I • 1 1 1 I 1 1 1 1 1 1 1 1 , 11 1 I 1 I 1 11 11/ 1 i 1 I 1 1 1 I I 1711 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 1I • 1 1 1 1 1 1 / 1 I 1 1 1 $ 1 1 1•1 1 1 I 1 1 1 1 1 p 1 1 1 1 I • 1 1 1 1 1 1 1 1 1, 11 1 1 1 1 --- . --- Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 5.5 1202 te-----'08 -)/t 1200 1198 1196 1194 1192 1190 1188 06 •-t .08 Legen L WS 100 year i iJ J _I 1 I Ii 1 I I I I C". --"--.--------"-j- I L L WS 100 yr w/ Encroa Ground • Bank Sta , • 1186 . 900 950 1000 1050 Station (ft) 1100 1150 • • mud creek flood study - September 2000 Plan 08 10/23/00 RS = 5.5 .06 .08 1200 .08 1198 1196 1194 1192 1190 1188 1186 1184 900 950 1000 1050 1200 1198 1196 1194 1192 1190 1188 1100 Legend WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta Encroachment 1150 Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 5 .08 )4( .06 08 ft 1186- 1184 -- ' • Legend WS 100 yr w/ Encroa WS 100 year Ground • Bank Sta Encroachment 1182 900 950 1000 1050 1100 1150 1200 Station (ft) 1 • • 120 120 119 119 118 118 119 118 118 11 118 118 117 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 4 08 06 >r 08 Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 3 .08 06 )1< 08 1 • 1 1 1 1 • 1 1± I 1 I 1 • 1 1 . Legend 1 1 1 1 r I : 1 1 r r i r i 1m 1 1 1/ 1 1 1 L 1 1 1 E 1 1 • 1 WS 100 year • ' ' •1 I ,1 1 i 1 1 1 1 I 11 1 1 1 1 L 1 1 1 I 1 I 1 1 i WS 100 yr w/ Encroa ) — a 1.--i-tr-a t_ • 1 3 1 • 1 I 1_1--1. . • t r : - , I I 1 1 • Ground — i , „ . I I Ii -i- -I- -I 1 , i i i r 1 / • • , , i , i , 1 1 1 1 , , , • Bank Sta — L 1 I i 1 1 i i _I. I I 1 i III! 1 I 1 I i i T I • .1 I i i I I I ' • I- L- L I I I4 t1 -I 1 1 I 1 I 1 1 i t . - - I, 1 1 1 1I I ...,..1 : 7... T r . a'. 1 ) • A i I 1 I I L 1 I 1 i 1 1 i 1 i 1 I 1 1 J ' I I 1 J -1 i 1 7 1 1 1 1 \: I T \ 1 1 L • i P i I r 7 1 1 1 1 1 1 1 1 1 I 1 1 i 1 ) i i . 1 . 1 i 1 -1 1 1 1 1 r 1 1 1 IL -I I • 1 ± ) / • 1 . 1 1 1 r 1 1 1 i i L 1 ' 1 1 1 1 1 • I 1 1 1 . . . 1 • p 1 . 1 1 •I 1 •1-. . ern nnn nen 4 nnn 4 nen , 44 nn Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 3 .08 06 )1< 08 1 _ • _, I -' --- p 1 i • - ` -4 Legend , • 1 1 •• 1 1 1/ 1 1 1 L 1 1 1 E 1 1 • 1 ' ' •1 I 1 1 1i 1 1 1 77 1 1 1 1 i 1 1 T r 1 1 1 WS 100 yr w/ Encroa — a 1.--i-tr-a t_ • 1 3 1 1 1 1 1 I 1_1--1. . • t r : - WS 100 year p • I 1 „ . . 1 1 1 i . 7 1 1 •1r /r1 T I Ground • Bank Sta , Encroachment 1 , 1 1 1 i i 1 1 1 i 1 1 1 1 . 1 1 i 1 I 1 1 1 1 i . \ •1-. _..,1,_;-•1 1 I n 1 4 • I I 1 I 1 i 11 1 111 1 1 I _- _..1 1 . 1 r i I L 1 L . r . I] 1 1 I I 1 1 1 i 1 i J .1 I I 1 /1 1 1 1 /1 --t- 111 11 1 1 .1 1 1 1 1 1 1 1 I •. ' ' 1 2 . . L •I 1 I 1 . 1 1 1 L 1 1- I i1 1 1 I 1 1 1 1 ' . . -- ' 1 1 1 i 1 -i 1 1 1 J 1 1 r . :.. . 1 1 1 . 1 1 1 p • 1 1 1 1 1 1 1 I 1. I 1 1 i1 • 1 1 i 4 1 1 1 1 1 1 1 IL i 1 1 i 1 I I I r 1 1 1 1 1 1 1 1 1 1 ' 1 1 1 1 1 1 . I 11 •I i 1 1 I 1 1 r „ 1 . 1 1 1 4 1 1 i r r . 1 • 1 . ' 1 1 . 1 . . . -1 r ' . .• . t i I I 1 r , 1 1 1 ILI 1 i 1 I . . . : . ri 1 i-7- -4-. Li • 1- ' r r 1 i • 1 p . t 1 „ 1 1 i: p 1 I 1 71 , 1 1 1 i - r . 1 p , . 1 1 . 1 . . 1 1 r . i T 4 1 I 1 1 i p . . • • onn . • . . . • • OCA nnn ne n 4 ...... A I%?_ • • • • A.‘ 4 4 nn ----A .. VDU I UUU Station (ft) I I OU • • 118 118 11 0 118 uJ 118 117 117 118 118 11 uJ 118 117 117 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 2.5 08 08 —><- UOU lUOU Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 2.05 .08 < .08 —><- 06. •1 j 1 j Legend _ r 2- 11 1 r 7' 1 WS 100 year _I -1 WS 100 year • L t I. 11 _ i a ' 1 WS 100 yr w/ Encroa t d - . t 1 1 i -1 - 1 J 1 I 1 r a Ground • Bank Sta 7 • i ' 2 : 1 71 1 I I 7 j 1 r a Ground • Bank Sta •Encroachment t 1 11 , • I i 4 i ] J i , , 1 1_, / ' i 1, _; I • ' , It. r • 1 a 1 _I J I Encroachment 1 , i I , , , 1 i _ 7 , i , . , , 1 I • T : i 1 1 J a I - I I I I 1 I F L • \ I 1 . • _ I j I I _1 I i r _ 1 1 i _1 1 ... ..__ .___ .___ .... UOU lUOU Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 2.05 .08 < .08 —><- 06. 900 950 1000 1050 1100 1150 Station (ft) 1200 1250 1300 •1 j Legend r t. 1 2- 11 1 7' 1 WS 100 year ; ; t WS 100 yr w/ Encroa _ i a ' 1 t d . 1 I 1 i -1 - 1 J 1 I 1 _J I a Ground • Bank Sta , 1 L ' J . 1 r •Encroachment t 1 11 , 1 J I i 4 i ] J i I - I - -J I 1 1_, / ' i 1, _; I • ' , It. r • 1 1 _I J I J 1 P 1 1 I P i I 1 T : i 1 1 J a 900 950 1000 1050 1100 1150 Station (ft) 1200 1250 1300 • • 118 118 118 118 118 117 117 mud creek flood study - September 2000 Plan 08 10/23/00 RS = 2 08 .08 --)..06 it( 900 950 1000 1050 1100 1150 Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 1 1188 1186 1184 2- 1182 111 1180 1178 1176 1174 900 1000 1100 1200 1300 ' 1400 Station (ft) 1200 1250 1300 k.08>.<064c .08 3.1 1 4 -4 • - L I - I F 1 i 1 • I I I 1 1 1 p i ± D i 1 r i r r ± r r r • 1 L L L L 1 1 1 I i I ' I 1 I " ' • I -• -I 1 L 1- I 1 I P I I • I • 1 1 egen WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta Encroachment j Legend _ J. 1•, J 1 , WS 100 year .1 i , WS 100 yr w/ Encroa • , C• , °1--8 , -2...."----- : -I • Ground r....-- i 1 , , , • Bank Sta ._ ! • L L L i1 1 ;' . , J 1 Encroachment •, , 1 , J , , 1 •_I -I I 1 J 1 1 I -J J 1 ) :I: • I- 4 -0 1 1 P • r , 1 1 I L 1 n T 1 1 i 1p i i T 1 1 1 1 1 • - i 1 1 1 i -, 1 7 I i r , r -I - ± •T 3 - • 1 4 T 11111 1 900 950 1000 1050 1100 1150 Station (ft) mud creek flood study - September 2000 Plan 08 10/23/00 RS = 1 1188 1186 1184 2- 1182 111 1180 1178 1176 1174 900 1000 1100 1200 1300 ' 1400 Station (ft) 1200 1250 1300 k.08>.<064c .08 3.1 1 4 -4 • - L I - I F 1 i 1 • I I I 1 1 1 p i ± D i 1 r i r r ± r r r • 1 L L L L 1 1 1 I i I ' I 1 I " ' • I -• -I 1 L 1- I 1 I P I I • I • 1 1 egen WS 100 year WS 100 yr w/ Encroa Ground • Bank Sta Encroachment as i i i ens i i i i i i 0I U D / / o U - (_ I0 # 510 7 # m 200 A `A` - ..i-. L # � 1 �, Y U o \ o ae / I MALL AVENUE O C 0 m 0 0 0 a a 0 0 o t1 l29 9 m lb 88 APPENDIX B MISCELLANEOUS PROJECT DATA AND RESULTS ........ Effects of Mitigation on Hydraulic Model ........ Starting Water Surface Elevations Computations ........ Hydrology ........ Elevation Check ........ Section Location Comparison ........ Freeboard Comparison ........ 100 year Water Surface Comparison Effects of Mitigation on Hydraulic Model CMN Business Park The small curbs added in the boxes take up only a very small portion of the flow area. The also run in the direction of flow and should not cause any significant losses. 192 sf 0.25 sf blockout 0.13% area blockage on Shiloh 240 sf 0.25 sf blockout 0.10% area blockage on Van Asche Plantings for the riparian habitat will increase the "n" values for the overbanks, riprap will increase "n" values in the channel. The rock check dams are very small (6" to 12" in height). These will impact low flows, but the infrequent design storms will show little change. These wiers will be submerged by 5 to 7 feet in a 100 year flood. In essence they raise the effective flowline of the creek in the immediate vicitity of the check structure. Near the confluence of the trib with mud creek, an encased sewer line has been built as a wier across the channel. This has been modeled as a normal section and as a wier for comparison. The two models showed very sinilar water surface profiles, with differences only in the hundreths position • Starting Water Surface Elevations for Hydraulic Models CMN Business Park 100 year 1187.50 The starting water surface elevation for the MCT3 study was derived from the Effective Existing Conditions Model of Mud Creek. Confluence Sta = 1.1 100 year WSEL @ 1.021 = 1186.82 100 year WSEL @ 1.246 = 1188.71 1188.71-1186.82 = 8.4 ft/mi (avg slope of water surface) 1.246-1.021 El @ Sta 1.1 1186.82+(1.1-1.021)'8.4 = 1187.48 (Use 1187.5) Hydrology • CMN Business Park Flows as Determined in Previous Study Generated by Milholland Company and used in previous study by TWH Consulting Return Perrod Station 25 100 490 --------- 685 1190.70 1655.50 810 ---- - --- - 950 - — 1170 _ 1128.40 1571.10 1365 -- — -- -------- 1445 1118.80 1554.60 _ west trib 890.12 1236.80 east trib 229.03 318.23 These flows were calculated using a modified rational. HUB performed a check of areas and flows before using them for the current study - For more detailed information on the Hydrology refer to the CMN Business Park Phase II- Phase I Drainage study (Milholland Company, 1998) Elevation Check CMN Business Park Elevations of the structures were compared between the survey and the plans to confirm that the same elevation datum had been used Plan Survey Elevation (measured) Location Elevation Shiloh, Upstream 1200.00 1200.00 Shiloh, Downstream 1198.00 1198.05 Van Asche, Upstream 1186.50 1186.50 Van Asche, Downstream 1185.00 1185.20 The structures (80 & 125' long respectively) were built according to plan Excepting the downstream invert of the Van Asche Structure appears to be 0.20 ft higher than the original plan elevation. Sections Location Comparison • CMN Business Park River station is determined upstream from the confluence with Mud Creek Sections used in the HUB study are from field surveyed sections. HUB River Downstream Station ID Station Reach Length 1175--==___ _._.Z.-------185 10 --- 3-- 375 190 - -- 4 --------------- 535 --- 160 5 705 170 6 965 260 7 - 1100 135 8 1250 150 9 1400 150 10 1550 _ _ 150 West 1585 35 — — 1610 — 25 East 1626 75 1650 25 Previous Model Section Stations 255 490 685 810 950 1170 1365 1445 1513 1563 1531 1581 1631 Station Alignment Comparison of station location for two studies ! New Model -----a is"---_-.____.____. _Old Model 0 500 1000 1500 2000 River Station I reeboard Comparisons .MN Business Park Min Road Elev Asche Shiloh ;.. TWH,model _ er .. _. watersurface t ' Freebo ard,'-` (' 'r." -' Van Asche * -.Shiloh-' Van Adh�IftShiloh.'" 25 year 1197.79 1206 13 100 year 1197.79 1206.13 ••;''1.19563•=.x _.':1205:05;. ^C216% " ;%:1.08{° HUB Model(Sept. 2000) HUB Model with Ultimate Encroachments water surface Freeboard water surface Freeboard _ _ Van Asche Shiloh Van Asche Shiloh Van Asche Shiloh Van Asche Shiloh _ 25 year 1193.91 1194.60 1204.04 1205.34 3.88 2.09 3.19 0.79 n/a n/a _ n/a n/a 100 year 1195.26 1205.34 2.53 0.79 00yr Floodplain and Encroachment Summary :MN Business Park River Station 100 year 100 year Station ID WSEL floodplain width Floodway CL Creek iuu year Change in Width Station WSEL wl WSEL Encroach - -- -- 175 - ------ 1 1187.50 ----------------- 390 124 996.50 1187.50 0.00 185 2 1187.50 367 138 996.45 1187.49 -0.01 375 3 1187.68 192 54 1001.85 1187.75 0.07 535 4 1191.18 40 40 998.95 1191.17 -0.01 705 5 1194.27 180 56 1001.30 1194.58 0.31 965 6 1194.60 142 142 996.50 1195.26 0.66 1100 7 1196.48 152 64 1000.05 1196.32 -0.16 1250 - - 8 ..----1197.50 ---- 164 61 992.05 1198.30 0.80 1400 9 1199.82 102 32 991.40 1200.60 0.78 1550 10 1205.34 88 88 1000.00 1205.34 0.00 1585 10.3 1205.23 63 1610 10.5 1205.53 73 1625 --_-_ ' 10.2 1205.65 88 1650 10.6 1205.95 50 1011.60 973.85 1003.35 1008.40 -- - - - - 100 Year WateeSurface Comparison HUB vs TWH Model of CMN Business Park 1210 1205 -- 0 1200 w 1195 1190 1185 0 500 1000 River Station 1500 --TWH HUB 2000 • STAFF REVIEW FORM • X AGENDA REQUEST CONTRACT REVIEW 04-09-01A10:19 RCVD GRANT REVIEW For the Fayetteville City Council meeting of April 17, 2001. FROM: Tim Conklin Planning Public Workn Name Division Department ACTION REQUIRED: To approve a resolution for ADO!- 13.00 to adopt the drainage study for floodplain and floodway delineation for Mud Creek Tributary at CMN Business Park II, Phase II, prepared by Holloway, Updike and Bellen, Inc. for Milholland Company, dated September, 2000. COST TO CITY: Cost of this Request Account Number Project Number BUDGET REVIEW Category/Project Budget Funds Used To Date Remaining Balance Category/Project Name Program Name Fund Budgeted Item _ Budget Adjustment Attached Budget Manager Administrative Services Director CONTRACT/GRANT/LEASE REVIEW: GRANTING AGENCY: Accounting Manager ty Attorn y. Purchasing Officer Date a Date Date Internal Auditor ADA Coordinator Date STAFF RECOMMENDATION: Staff recommends approval. rro-or Date D e 5� to Date Cross Reference New Item: Yes Prev Ord/Res #: Orig Contract Date: Orig Contract Number FAYETTEVI tLE THE CITY OF FAYETTEVIIIE, ARKANSAS DEPARTMENTAL CORRESPONDENCE To: Tim Conklin, Planning Director From: Heather Woodruff, City Clerk Date: April 24, 2001 Attached is a copy of the resolution approving AD 01-13.00 adopting the drainage study for CMN Business Park. The original will be microfilmed and filed with the City Clerk. cc: John Goddard, Info. Tech. Scott Caldwell, Info. Tech. HEC RAS Plan' Plan 07 123680 120090 120553 170594 0006768 516 - 23979 7347 - 050 123660 119970 120523 120571 0005821 5.57' 22415 62,55 049 123680 119970. 12052] 120571 0005821 557 22415 6255 049 318.23 120400 120595 120595 120674 0033381 713 4485 3022 100 7102] 120400 120595 120595 120674_- 0033381 713 4485 30.22 „9800, 100 31823 120000 120565 120569 0000531 179 _189._. 18922 5042 015 3192] 120000 120565 -120569 00005]1 179 18922 50.42 0.15 155460 120000 120534 120285 120567 0002767 467 36512 8763 036 155460 120000 1205.34 1202.85 122056] 0002]6] 467 765.12 87.630 J6 Culven 155468 119570 119982 119992 120100 -0.0221]4-' 996 215.37 095 102.02 1554.60 1195)0 120060 _ 120060 0000 R02Ji 0029865 1165 17]41 32.00 LO1 1511 10 ._ 00_7 119140 119750 119].90-_ 0.006199 614 0.52 410.69 16368 ----- 15111 ID 0 1191-dp 1198.30 - 119901— 0.00]0]4 --__]91 _]]2.986051 _ 0.51 157110 118950 119648 /1119665 114665 0 .00760._. 6W7BBO 649_11104_.__ 649 41044 152.22 049 157110_ 118950_19632 _ 119730011987 962 22770 074 0098_6389 9898 1571 10 9800 1187.20 119460 119431 -1185.]8 0014605 8.51 302.54 14175 -----066 157110 118] 20 98.98 119526 119431 1195.69 000>551 659 4040816072 046 9801 .. - Culven 165550 210340 119427- 119452 0003031 454 - 54296 031 1004]--- 165550 218340 119458 195030004740 553 32789 536037 165550 118180 119118 119118 1193.07* - 0041156 11-03 15004 ]995 ---9898100 1655.50 118180 119117 1191 2798 119307 0041510 1107 -14948 39.63 _9898 101 1655.50 11/830 1187.68 1188.03 0.006091 577 46729 191.58 042 165550 11]830 118775 116052 0.0112250 761 155.93 94.40 0.55 165550 11]6.50 116]91 1167.9] 1187.58 0.000982 2,07 1106.55 367.40 0.88 ,- 165550 117550 218750 118393 1187.65 000192_ J]5 63025 138.06 0.24 lnllne weir0110_-- _---__-- 1653.701176.50 98981187.50 -------�-118].51 1100 0000989 2.881102.9] 36]40 018 155370 1_76.50 1187.49 _ '187.64 -_ 0.001932 375 628.91 13006 0.24 165310 0000_ 11 75,00 1187.50 1182.54 ii87,56 9 0.0080 2.]1 125491 38960' 0.15 165310_ _ 1750. __11]500 116]50____-1182.54 tt87.61__O00118J_-___]3t ]1372 124.1] 0.18 HEC-RAS Man: Man 07 a J RircrSa I W.5. 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' 5 1 11941) 2194.52 18047 160:]0 1190.59 255.53 "—" " 981.3� " 1021:3O 1194.5!" 031 119503 56]6 `---i 527.52 12].98- 96130 981)0-"1031-3U '0i)6fi 119118 -_ "..."._. . "-Ii930] - 3995 '-- 1655.50 - --- - -�'- 9]0 6O 1019.30 ' a4^ca:y 1 1191 17 .001 11910] ]9 BJ _ _ 165550 97050 978 60 -1019N- 101930 3.-. ., `p+i +IB]fiB n880] 19158 611 03 003 40 40,27 98]00 1016]0 l6))5 006 1188.52 5440 318.00 1116]p _._ 96230 98]0O 1016)O 1016 )0 nT 23 `,(I 116)51 118158 16]60 725,51 72735 ]0264 6-' 929.90 101300 1181.50 001 I10].fi5 138.06 94746 ]--- 9]990 9]9.90 101]00 tit]90 �i `+4-Y T. •13 -__ _ _. __ ___ t 2.05%,,''.;...! Insne Weil __.._ _. _ ".___ _ _ __... "_. _ _ r 118150 175 J6].a0 225,28225,28 101500 ]28.24-. ]W+9 9]8.90 2--.::,,T. ' 210]49 00+ 11815164 --- 11606- 94]11 ]06.16 91990 9)8.90 101].00 -1117% ' fL 1 -r': .1 110]50 110].56 ]09.60] 6269 ]2502 ]]5.]9 983.10 100990 116750 000 NO]1 124.1] __ BB569 ]fi8.01 90310 98).10 .___. 100990 n0]22