1. Determine the headwater depth (HW) of a 900 mm diameter concrete pipe culvert operating under inlet control with a stream flow of 1.95 m3/s. The culvert is headwall and grooved edge. If the entrance invert elevation is 137.16 m, what is the headwater elevation? 2. Determine the head water depth of a 930 mm by 1830 mm concrete box culvert operating under inlet control with a stream flow of 2.27 m3/s. The culvert has wingwalls at 45 flares. If the entrance invert elevation is 137.16 m, what is the headwater elevation? 3. Determine the head water depth of a 915 mm by 1830 mm concrete box culvert operating under outlet control with a stream flow of 2.27 m3/s. The culvert is 30.50 m long and has wingwalls at 45 flares and a beveled edge at the crown. The slope of both the stream and culvert is 0.250%, and the elevation of the upstream invert is 137.16 m. Tailwater depth is 0.98 m. 4. Determine the head water depth of a 915 mm by 1830 mm concrete box culvert operating under outlet control with a stream flow of 2.27 m3/s as in problem # 3, except that the tailwater depth is below the culvert crown (TW = 0.30 m). All other parameters are similar to problem # 3.