Table 3: Specified hydraulic conditions

Stability design hydrograph Freeboard hydrograph
Design velocity, ft/s 15 29 29
Design shear stress, lbs/ft2 14 35.9 25
Bed slope, ft/ft 0.4 0.4 0.4
Side slope, (H:V) 3:1 100:1 3:1
Allowable block protrusion, inch 0.5 for uniform blocks, 0.0 for 0.5inch tapered blocks 0.5 for uniform blocks, 0.0 for 0.5inch tapered blocks
Minimum factor of safety 1.8 1 1