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HomeMy WebLinkAbout18 Civil Engineering Report App E MDT Calculations>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>480548104815M:\193190\Drawings\Culvert Figure.dwgEAST FRONTAGE APPROACH CULVERT DRAINAGE BASIN EXHIBIT "A" EAST FRONTAGE APPROACH CULVERT DRAINAGE BASIN 193190JOB NUMBER : SHEET : SCALE :AS NOTED 1 OF 10Feet200 DATE :04/20/2021 W E B : w w w . h y a l i t e e n g . c o m 2304 NORTH 7TH AVENUE STE. L B O Z E M A N , M T 5 9 7 1 8P H O N E : ( 4 0 6) 5 8 7 - 2 7 8 1 F A X : ( 4 0 6 ) 5 2 2 - 9 2 2 5 FRO N T A G E R O A D EXISTING CULVERT (TYP.) EXISTING DITCH (TYP.) PROPOSED CULVERT PROPOSED PROJECT SITE CULVERT DRAINAGE AREA 3.87 AC TOTAL 0.72 AC IMPERVIOUS 3.15 AC PERVIOUS Equations Used: Qp = C i A (Modified Rational Method)i = a * (DURATION) ^ -(b) (City of Bozeman)Overland Flowtc=((1.8)*(1.1-C)*(D^(1/2)))/(S^(1/3)) (City of Bozeman)Channel FlowV=3.28*k*(S^(1/2), where k=0.457 (grassed waterway) (FHWA HEC 22, Eqn 3-4)CULVERT BASINBasin Area (ac): 3.87Post-Dev C (weighted): 0.37Overland Distance (ft): 100 Storm Event IntensityOverland Slope (%): 1.0(yr) (in/hr)A BChannel Flow Distance (ft): 1590.02 0.54 0.36 0.6Channel Flow Slope (%): 1.05 0.80 0.52 0.64Post-Dev. Tc (min): 30.810 0.99 0.64 0.65Storm Event (yr):2102510025 1.19 0.78 0.64Storm Coeff. A: 0.36 0.64 0.78 1.01 50 1.43 0.92 0.66Storm Coeff. B:0.60 0.65 0.64 0.67 100 1.58 1.01 0.67Composite C: 0.37 0.37 0.37 0.37Storm Intensity (in/hr): 0.54 0.99 1.19 1.58Post-Dev Qp (cfs):0.77 1.41 1.71 2.26EAST FRONTAGE APPROACHPOST-DEVELOPMENT SUB BASIN FLOWSStorm Coeff. (i)L:\193190\Computations\Basin Flow Rates.xls HY-8 Culvert Analysis Report Water Surface Profile Plot for Culvert: Culvert 1 Site Data - Culvert 1 Site Data Option: Culvert Invert Data Inlet Station: 0.00 ft Inlet Elevation: 4782.05 ft Outlet Station: 68.00 ft Outlet Elevation: 4781.70 ft Number of Barrels: 1 Culvert Data Summary - Culvert 1 Barrel Shape: Circular Barrel Diameter: 2.00 ft Barrel Material: Corrugated Steel Embedment: 0.00 in Barrel Manning's n: 0.0240 Culvert Type: Straight Inlet Configuration: Square Edge with Headwall Table 1 - Culvert Summary Table: Culvert 1 ******************************************************************************** Straight Culvert Inlet Elevation (invert): 4782.05 ft, Outlet Elevation (invert): 4781.70 ft Culvert Length: 68.00 ft, Culvert Slope: 0.0051 ******************************************************************************** Table 2 - Summary of Culvert Flows at Crossing: E Frontage RI/RO Headwater Elevation (ft) Total Discharge (cfs) Culvert 1 Discharge (cfs) Roadway Discharge (cfs) Iterations 4782.05 0.00 0.00 0.00 1 4782.29 0.20 0.20 0.00 1 4782.38 0.39 0.39 0.00 1 4782.46 0.59 0.59 0.00 1 4782.52 0.78 0.78 0.00 1 4782.58 0.98 0.98 0.00 1 4782.63 1.18 1.18 0.00 1 4782.68 1.37 1.37 0.00 1 4782.71 1.49 1.49 0.00 1 4782.77 1.76 1.76 0.00 1 4782.81 1.96 1.96 0.00 1 4786.50 20.82 20.82 0.00 Overtopping Total Discharge (cfs) Culvert Discharge (cfs) Headwater Elevation (ft) Inlet Control Depth (ft) Outlet Control Depth (ft) Flow Type Normal Depth (ft) Critical Depth (ft) Outlet Depth (ft) Tailwater Depth (ft) Outlet Velocity (ft/s) Tailwater Velocity (ft/s) 0.00 0.00 4782.05 0.000 0.000 0-NF 0.000 0.000 0.000 0.000 0.000 0.000 0.20 0.20 4782.29 0.204 0.237 2-M2c 0.206 0.151 0.151 0.073 1.815 0.814 0.39 0.39 4782.38 0.290 0.333 2-M2c 0.286 0.214 0.214 0.109 2.170 1.042 0.59 0.59 4782.46 0.356 0.409 2-M2c 0.349 0.263 0.263 0.138 2.411 1.197 0.78 0.78 4782.52 0.413 0.473 2-M2c 0.403 0.304 0.304 0.163 2.600 1.316 0.98 0.98 4782.58 0.463 0.530 2-M2c 0.450 0.341 0.341 0.185 2.758 1.417 1.18 1.18 4782.63 0.509 0.582 2-M2c 0.493 0.374 0.374 0.205 2.896 1.502 1.37 1.37 4782.68 0.551 0.630 2-M2c 0.533 0.404 0.404 0.223 3.019 1.577 1.49 1.49 4782.71 0.575 0.658 2-M2c 0.556 0.422 0.422 0.234 3.087 1.619 1.76 1.76 4782.77 0.629 0.717 2-M2c 0.607 0.460 0.460 0.257 3.232 1.705 1.96 1.96 4782.81 0.664 0.758 2-M2c 0.641 0.486 0.486 0.272 3.326 1.762 Crossing Discharge Data Discharge Selection Method: Specify Minimum, Design, and Maximum Flow Minimum Flow: 0 cfs Design Flow: 1.49 cfs Maximum Flow: 1.96 cfs Tailwater Channel Data - E Frontage RI/RO Tailwater Channel Option: Trapezoidal Channel Bottom Width: 3.00 ft Side Slope (H:V): 4.00 (_:1) Channel Slope: 0.0100 Channel Manning's n: 0.0300 Channel Invert Elevation: 4781.70 ft Roadway Data for Crossing: E Frontage RI/RO Roadway Profile Shape: Constant Roadway Elevation Crest Length: 100.00 ft Crest Elevation: 4786.50 ft Roadway Surface: Paved Roadway Top Width: 40.00 ft