A water line is planned to connect a new reservoir to an existing water treatment plant. The average water surface elevation of the reservoir is 750' above seal level. There are seven miles of pipe. It is anticipated that only concrete pipe will be available and that there should be included in the line two (2) gate valves, a swing check valve and four (4) 90 degree bends to provide flexible routing. The projected peak flow rate demand is 12 million gallons per day.
Determine the pipe diameter considering that concrete pipe is available in a range of diameters from 12" to 48" in 3" increments only."