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Home My WebLink About20070295 Ver 6_8.08 Energy Dissipation Culvert 2_20191220HY-8 Energy Dissipation Report External Energy Dissipator Parameter Value Units Select Culvert and Flow Crossing Crossing 2 Culvert Culvert 2 Flow 240.30 cfs Culvert Data Culvert Width (including multiple barrels) 7.0 ft Culvert Height 7.0 ft Outlet Depth 3.57 ft Outlet Velocity 10.39 ft/s Froude Number 0.97 Tailwater Depth 3.57 ft Tailwater Velocity 5.59 ft/s Tailwater Slope (SO) 0.0134 External Dissipator Data External Dissipator Category Streambed Level Structures External Dissipator Type Riprap Basin Restrictions Froude Number <3 Input Data Condition to be used to Compute Basin Outlet Velocity Best Fit Curve D50 of the Riprap Mixture Note: Minimum HS/D50 = 2 is Obtained if D50 = 0.350 ft D50 of the Riprap Mixture 1.167 ft DMax of the Riprap Mixture 1.917 ft Results Brink Depth 3.812 ft Brink Velocity 11.222 ft/s Depth (YE) 3.400 ft Riprap Thickness 2.876 ft Riprap Foreslope 3.8340 ft Check HS/D50 Note: OK if HS/D50 > 2.0 HS/D50 0.000 HS/D50 Check HS/D50 is NOT OK Check D50/YE Note: OK if 0.1 < D50/YE < 0.7 Check D50/YE 0.343 D50/YE Check D50NE is OK Basin Length (LB) 28.000 ft Basin Width 25.667 ft Apron Length 7.000 ft Pool Length 21.000 ft Pool Depth (HS) 0.000 ft TW/YE 1.050 Tailwater Depth TW 3.570 ft Average Velocity with TW 2.052 ft/s Critical Depth (Yc) 1.347 ft Average Velocity with Yc 6.291 ft/s Downstream Riprap for High TW Distance: 1 LB Velocity 8.985 ft/s Size 0.526 ft Distance: 2 LB Velocity 6.119 ft/s Size 0.244 ft Distance: 3 LB Velocity 4.068 ft/s Size 0.108 ft Distance: 4 LB Velocity 3.044 ft/s Size 0.060 ft