A spillway is constructed in a triangular shape with a height of 30 ft and a downstream face on a 45° angle as shown in Figure P4.54. The weight of the concrete is 150 lb/cubic feet. If the water...

A spillway is constructed in a triangular shape with a height of 30 ft and a downstream face on a 45° angle as shown in Figure P4.54. The weight of the concrete is 150 lb/cubic feet. If the water level behind the spillway is 35 ft high, the foundation is impermeable, and tail water can be ignored, what is the resultant reaction force and where is it located?