Augmenting a City’s Water Supply
The city of Redlands, Cal., is now augmenting the city water supply by a very novel method. A small mountain stream with a flow of eight cubic feet per second is dropped through a pipe 180 feet to a 300-h.p. turbine developing 240 h.p. This turbine is direct connected to a deep well pump having a capacity of 5 cubic feet per second. Both the 8 cubic feet per second flow from the small mountain stream and the 5 cubic feet per second pumped by the deep well pump are discharged into a common pipe which drops a distance of 220 feet to a second turbine, which in turn is direct connected to a deep well pump that lifts 8 cubic feet of water per second, thus the city now has the original flow of the mountain stream plus the five cubic and the eight cubic feet produced by the two deep well pumps, giving a total of 21 cubic feet per second. A third turbine and pump is to be installed on this system.