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Wynnpage North 1-CS030210 Bentley I PRINCIPAL I MARC O BENTLEY, P.E. E N G I N E E R INC. I N C. February 10, 2003 Mr. Kenneth M. Griffin, P.E. Director of Engineering & Public Works City of Coppell 255 Parkway Coppell, Texas 75019 Re: Wynnpage Plaza Lot 1, Block B BEI No. 22138 Dear Mr. Griffin: Attached are two (2) revised sets of the site development plans for the referenced project. We are submitting these plans for your review and comments. We are requesting that the on-site pavement be 6 inch thick 4000 PSI reinforced concrete pavement with #3 rebar on 18 inch centers in both directions on 6 inch compacted subgrade. This request is being made in lieu of lime stabilizing the subgrade. We would appreciate your consideration of our alternate paving section. If you should have any questions or concerns, please do not hesitate to call. Sincerely, BENTLEY ENGINEERING, INC. Matt Billingslea ok CIVIL ENGINEERING 4125 BROADWAY BLVD. 972-240-4821 [TEL] SUITE A250 972-240-0922[FAX] GARLAND, TEXAS 75043 WWW.BENTLEYENGINEERING.COM 702 GATEWOOD DRIVE GARLAND, TEXAS 75043 (972)240-4821 FAX(972)24(1-0922 1 .1 )t , , ..) / / ' .. _ 1 0 )...--_ ., - Ti s�i, 6 7 ,L , SI 1 8, ` t s i I 1 1 ),... \ � A Qb ` ` y j � T` S ',IANANPAGE OR. , :-----------------------■'-- ' r I „,,, i------Thi\ , -_ i I i is , \ .! , i , , t , I. M 1 I'0 ' / 1 �1 Svti. 7. a r _ I', 11 • . 1 w • , VC,ET ' StM.S WR.1v/1 ' NOSE r+'INC E r ..,__ �^ r ; E3 'y ►� 1. �- - I �� CA ll .,..- � { 51ubou f; For Fut#j�Qroo= 1 •cis , t� Strn.SWA Exfi2n5•� �� 2Ia 2r" 5 1 :',/L/,vE ��p -��� ro'rti1c.E7 , 6100= i4.cv c s ■ , - --_-_,..:".., ; `..._ -_-_--"... i (k. - . • . - (AL, Ittiearikilie ... ___ _---0..... :// 1 0 '•, PILOT CNANIVEL / lk A -7 c')-c 50'ROW 3 0 0 s l r.b1 - 5 , -\ k ° a v ,' \ �ti a o0-9 fos % O o `° o Q/4-e. C _ I$ 0 s S"CROVN 1/4" Ft . 5 7 c c sor?)_016-So-r 0-7 1,-1i°10 CAPACITY CI.- 31651-CAPgCIT� a•a W• n= 0.0n STREET PARAGCIA`( A=Co.OQc 2 n=o.ot3 aZ/3= O." Co A= f2.4Ff2 4:7 s35 C = 24(05/2 72,a 4:? .53cf2 Worksheet A Worksheet for Irregular Channel Project Description S I rye S, C Worksheet Irregular Channel-1 Flow Element Irregular Channel Method Manning's Formula Solve For Channel Depth Input Data Slope 0.006200 ft/ft Discharge 5.90 cfs Options Current Roughness Method Improved Lotter's Method Open Channel Weighting Method Improved Lotter's Method Closed Channel Weighting Method Horton's Method Results Mannings Coefficient 0.013 Water Surface Elevation 0.28 ft Elevation Range 0.00 to 0.50 Flow Area 2.5 ft2 Wetted Perimeter 18.46 ft Top Width 17.90 ft Actual Depth 4 .28 , Critical Elevation 0.29 ft Critical Slope 0.004879 ft/ft Velocity 2.37 ft/s Velocity Head 0.09 ft Specific Energy 0.37 ft Froude Number 1.12 Flow Type Supercritical Calculation Messages: Flow is divided. Roughness Segments Start End Mannings Station Station Coefficient 0+00 0+27 0.013 Natural Channel Points Station Elevation (ft) (ft) 0+00 0.50 0+00 0.00 0+14 0.42 0+27 0.00 0+27 0.50 Project Engineer:Marc Bentley c:\haestad\fmw\22138.fm2 Bentley Engineering FlowMaster v6.0(614e] 02/06/03 03:18:07 PM ©Haestad Methods, Inc. 37 Brookside Road Waterbury,CT 06708 USA (203)755-1666 Page 1 of 1 Worksheet S Worksheet for Irregular Channel Project Description .5 )ope AA 40 5 I Worksheet Irregular Channel- 1 Flow Element Irregular Channel Method Manning's Formula Solve For Channel Depth Input Data .......„„„,„10 Slope 0.005000 ft/ft Discharge 14.50 cfs Options Current Roughness Method Improved Lotter's Method Open Channel Weighting Method Improved Lotter's Method . Closed Channel Weighting Method Horton's Method Results Mannings Coefficient 0.013 Water Surface Elevation 0.41 ft Elevation Range 0.00 to 0.50 Flow Area 5.3 ft2 Wetted Perimeter 26.93 ft Top Width 26.11 ft 1. D Actual Depth Depth Critical Elevation 0.42 ft Critical Slope 0.004328 ft/ft Velocity 2.73 ft/s Velocity Head 0.12 ft Specific Energy 0.52 ft Froude Number 1.07 Flow Type Supercritical Calculation Messages: Flow is divided. Roughness Segments Start End Mannings Station Station Coefficient 0+00 0+27 0.013 Natural Channel Points Station Elevation (ft) (ft) 0+00 0.50 0+00 0.00 0+14 0.42 0+27 0.00 0+27 0.50 Project Engineer:Marc Bentley c:\haestad\fmw\22138.fm2 Bentley Engineering FlowMaster v6.0[614e] 02/06/03 02:42:26 PM ©Haestad Methods, Inc. 37 Brookside Road Waterbury,CT 06708 USA (203)755-1666 Page 1 of 1 Worksheet C C, Worksheet for Irregular Channel Project Description S lo JS 0 C Worksheet Irregular Channel-1 Flow Element Irregular Channel Method Manning's Formula Solve For Channel Depth T Input Data ....may Slope 0.017000 ft/ft Discharge 20.20 cfs Options Current Roughness Method Improved Lotter's Method Open Channel Weighting Method Improved Lotter's Method Closed Channel Weighting Method Horton's Method Results Mannings Coefficient 0.013 Water Surface Elevation 0.37 ft Elevation Range 0.00 to 0.50 Flow Area 4.3 ft2 Wetted Perimeter 24.25 ft Top Width ��53 ft Actual Depth Critical Elevation 0.47 ft . Critical Slope 0.004045 ft/ft Velocity 4.70 ft/s Velocity Head 0.34 ft Specific Energy 0.71 ft Froude Number 1.94 Flow Type Supercritical Calculation Messages: Flow is divided. Roughness Segments Start End Mannings Station Station Coefficient 0+00 0+27 0.013 Natural Channel Points Station Elevation (ft) (ft) 0+00 0.50 0+00 0.00 0+14 0.42 0+27 0.00 0+27 0.50 Project Engineer:Marc Bentley c:\haestad\fmw\22138.fm2 Bentley Engineering FlowMaster v6.0[614e] 02/06/03 02:53:38 PM ©Haestad Methods, Inc. 37 Brookside Road Waterbury,CT 06708 USA (203)755-1666 Page 1 of 1 l 0 Or Y ® p gii • 464) a Its A• 1 • �� II p , tMReM.r"R 1 1 1 1 .IA'' `,/ Nis° 44** IPIP el Ald11.11 : o r•-to go 1 I I I, 1. 1141„, 7.,, ...0 H r , 1 '.4 -4N ' 4' till 9 a® 4 Afr . a . 1 _ / I I l 0 i f a Y'it 1 t ; 1 • _ 1:- i , , , I. 1 , r • , -- -- EA O 1 I O ! ' : 75.54 .. 111. 7. 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