1. Determine the smallest CMP that can be used as a culvert under the following conditions: Q50 = 35 cfs Invert elevation at inlet = 341.35 ft Invert elevation at outlet = 340.70 Natural channel slope = 0.5% Tailwater depth at Qso = 1.8 ft Culvert length = 110 ft Roadway embankment shoulder elevation = 345.32 ft Use U-type endwalls Determine the outlet velocity and select the appropriate lining material for the outlet ditch to prevent scouring