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HomeMy WebLinkAboutSDP200400030 Calculations 2004-10-13 1740 Lambs Road • Charlottesville,Virginia 22901 Phone:(434)978-7879 • Fax:(434)973-0249 e-mail:Tmuncaster@earthlink.net Muncaster Engineering October 12,2004 Mr. Glenn Brooks, P.E. Department of Engineering&Public Works 401 McIntire Road Charlottesville, VA 22902-4596 Re: Albemarle Baptist Church Dear Mr. Brooks: Attached are drainage area maps and drainage calculations. Please call if you have questions or comments. Sincerely, W. Thomas Muncaster,Jr.,P.E. RECEIVED OCT 13 2004 COMMUNITY DEVELOPMEN Brooks 10-12-04 ruatWtifiHtw*fHtlHititititxitxftititititrietHHHHfiru HYDRO it*wit wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww VERSION 2.2 wwww Area Number C Area (ac) CA 1 0.500 0.310 0.155 2 0.300 2.700 0.8i0 3 0.450 0.450 0.203 Weighted Totals: 0.337 3.460 1.167 Time of concentration- 15 min Period Intensity Peak Flow (years) (in/hr) (cfs) ENTRANCE PIPE 2 3.40 3.97 5 4.15 4.85 Calculations 8 10 4.70 5.49 25 6. .46 Drainage Map 50 .10 SC 7.12 100 6.80 7.94 Albemarle Baptist Church 5.5 Oa HW/D= 0.52 for tir GRAPHIC SCALE 1"=60 ' ME E 0 60 120 180 _ - . . . - 4) Aito r . ... - AI lik ir - - - - - 114 sir 111‘.! iltkV ....\ ._. 14) P 77 ,2.7"A1/4C... _ —0a0.3 — \ — — — -' ..0.01$A OFF31TE� (411 \ \ 11 _ \ — \ i e t) 031 / \ i . 1 ifirliA � 40 a ENTRANCE PIPE Calculations g Drainage ap If4 Albe'- •rle P,aptist Church MI OD S=607.3-550/23�7.6 Z C=0.3 Ta=I5 i I l I - 411, I it% illitl % 411(.°1°1111°.°I. , 0.72 AC 21 z. k 571 7 To=s I 0=0.3 OFFS! IIC O.•5 AC• �_ \t‘ 575 --------\ ges\ i .t . ST v PARKING LOT SPREAD s,,,,,'HIc SCALE i"=so ' Calculations g —m umum Drainage Map 0 60 120 180 Albemarle baptist Church fArea Number C Area (ac) CA 4 0.800 0.720 0.576 Weighted Totals: 0.800 0.720 0.576 Time of concentration= 5 min ' Intensity Peak Flow (in/hr) (cfs) 4.00 2.30 TOTAL PEAK DISCHARGE = 2.30 (cfs) GUTTER SLOPE = 0.0200 FT/FT PAVEMENT CROSS SLOPE = 0.0200 FT/FT SPREAD W W/T SW SW/SX Eo a S'W SE 7.01 2.0 0.25 0.0833 4.2 0.75 3.5 0. 147 0. 128 XXXXXXXXXX CURB INLET ON A CONTINUOUS GRADE XXXXXXXXXX REQUIRED LENGTH= 11.2 EFFICIENCY= 0.55 CFS INTERCEPTED= 1.27 CFS CARRYOVER= 1.03 —.----__ wo— -... _ • IVO ,, ...._ ,_ _ ,, 1001111111 ---- t 111111.aiL WO1111".. tr- .....* % 1,0 ‘ _ 0 d tittfrA A11441111W II. .440001k 4ff --- .___ 111101. 400 — --- , .41;‘1/4:04.72---. ii, ii,......11 --, ,, 4041N1)::„........ 1010011111111111/ Area Number C Area (ac) CA 1 0.800 0.720 0.576 Weighted Totals: 0.800 0.720 0.576 Time of concentration= 5 min Period Intensity Peak Flow (years) (in/hr) (cfs) 2 5.40 3.11 5 6.35 3.66 10 7.10 4.09 25 8.00 4.61 50 8.90 5.13 100 9.60 5.53 Vee Channel 1: Station #1 (ft) 100.00 2: Station #2 (ft) 0.00 3: Length (ft) 100.00 4: Upstream invert elevation (ft) 576.00 5: Downstream invert elevation (ft) 568.00 6: Slope (ft/ft) 0.0800 7: Flow (cfs) 4.09 8: Manning's n 0.0500 9: Left side slope (_ Horizontal / Vertical) 3.00 10: Right side slope ( Horizontal / Vertical) 3.00 Left Side Slope: 3.00:1 (Horizontal/Vertical) Right Side Slope: 3.00:1 (Horizontal/Vertical) Uniform Flow: Normal Critical Slope (ft/ft) : 0.0800 0.0568 Flow (cfs) : 4.09 Velocity (ft/sec) : 3.6740 3.2317 Length (ft) : 100.00 Depth (ft) : 0.6092 0.6495 Travel time (sec) : 27.22 Depth (in) : 7.3099 7.7941 (min) : 0.45 Manning's n: 0.0500 Hydraulic Radius: 0.2889 Wetted Area (sq ft) : 1.1132 Wetted Perimeter (ft) : 3.8527 Top Width (ft) : 3.6550 PIPE 8 DITCH Drainage Map Albemarle Baptist Church 1111111.1 : _, — T•— 114%1111 :_____ _ .:::,%_ A _ — \ 71.e.6 AC -C 03 Ta35 ` 4 tJ I GRAPHIC SCALE 1"=60 ' NE Ns NM 0 60 120 180 1 Area Number C Area 's^' CA PIPE • t DITCH 6 0.600 0 0.064 Y 1 Weighted Totals: 0.600 0.140 0.084 Calculations//�� I ( Time of concentration- 5 min Albemarle baptist Church Period Intensity Peak Flow (years) (in/hr) (cfs) 2 5.40 0.45 5 6.35 0.53 10 7.10 0.60 25 8.00 0.67 50 8.90 0.75 100 9.60 0.81 Circular Channel 1. Station #1 (ft) 110.00 2. Station #2 (ft) 0.00 3. Length (ft) 110.00 4 Upstream invert elevation (ft) 1.75 5. Downstream invert elevation (ft) 0.00 6. Slope (ft/ft) 0.0159 7. Flow (cfs) 0.60 8 Manning's n 0.0130 9 Diameter (in) 12.00 Diameter: 12.000 in. Uniform Flow: Normal Critical Slope (ft/ft): 0.0159 0.0054 Flow (cfs): 0.60 Velocity (ft/sec): 3.9786 2.6969 Length (ft): 110.00 Depth (ft): 0.2458 0.3262 Travel time (sec): 27.65 Depth (in): 2.9619 3.9146 (min): 0.46 Manning's n: 0.0130 Hydraulic Radius: 0.1450 Wetted Area (sq ft): 0.1508 Wetted Perimeter (ft): 1.0399 Pipe Capacity (cfs): 4.4925 Area Number C Area (ac) CA 6 0.600 0. 140 0.084 7 0.300 0. 180 0.054 Weighted Totals: 0.431 0.320 0. 138 Time of concentration= 5 min Period Intensity Peak Flow (years) (in/hr) (cfs) 2 5.40 0.75 5 6.35 0.88 10 7. 10 0.98 25 6.00 1. 10 50 B.90 1.23 100 9.60 1.32 Vee Channel 1: Station #1 (ft) 125.00 2: Station #2 (ft) 0.00 3: Length (ft) 125.00 4: Upstream invert elevation (ft) 570.00 5: Downstream invert elevation (ft) 566.00 6: Slope (ft/ft) 0.0320 7 Flow (cfs) 0.98 8 Manning's n 0.0500 9 Left side slope (_ Horizontal / Vertical) 3.00 10 Right side slope (_ Horizontal / Vertical) 3.00 Left Side Slope: 3.00: 1 (Horizontal/Vertical) Right Side Slope: 3.00: i (Horizontal/Vertical) Uniform Flow: Normal Critical Slope (ft/ft) : 0.0320 0.0687 Flow (cfs) : 0.98 Velocity (ft/sec) : 1.8230 2.4285 Length (ft) : 125.00 Depth (ft) : 0.4233 0.3668 Travel time (sec) : 68.57 Depth (in) : 5.0797 4.4011 (min) : 1. 14 Manning's n: 0.0500 Hydraulic Radius: 0.2006 Wetted Area (sq ft) : 0.5376 Wetted Perimeter (ft) : 2.6772 Top Width (ft) : 2.5399