RIPRAP BASIN CHECKLIST Route Project No. Designer Date Reviewer Date DESIGN VALUES FINAL TRIAL 1 BASIN DIMENSIONS FEET (IDM Figure 203-2M) TRIAL Equivalent Depth, 10hS dE Pool length is the larger of: 3Wo D50/dE 15hS D50 Basin length is the larger of: Froude No., 4Wo Fr Approach Thickness 3D50 hS/dE Basin Thickness 2D50 hS hS/D50 2 < < 4 hS/D50 TAILWATER CHECK DOWNSTREAM RIPRAP (IDM Figure 203-2N) Tailwater, TW L/DE L VL/Vo VL D50 Equivalent depth, dE TW/dE IF > 0.75, calculate riprap TW/dE downstream using Figure 203-2N IDM = (4Ac/π)0.5 DE
RIPRAP BASIN CHECKLIST Route Project No. Designer Date Reviewer Date DESIGN VALUES (IDM Figure 203-2M) TRIAL 1 FINAL TRIAL BASIN DIMENSIONS FEET Equivalent Depth, dE Pool length is the larger of: 10hS D50/dE 3Wo D50 Basin length is the larger of: 15hS Froude No., Fr 4Wo hS/dE Approach Thickness 3D50 hS Basin Thickness 2D50 hS/D50 2 < hS/D50 < 4 TAILWATER CHECK DOWNSTREAM RIPRAP (IDM Figure 203-2N) Tailwater, TW L/DE L VL/Vo VL D50 Equivalent depth, dE TW/dE IF TW/dE > 0.75, calculate riprap downstream using IDM Figure 203-2N DE = (4Ac/π)0.5
Chk203-2L.docx