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Silver Lake Reservoir Replacement

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This reservoir construction project aims to eliminate the contamination of drinking water by allowing it to bypass the existing open Silver Lake and Ivanhoe Reservoirs and flow into the new Headworks Reservoir, thereby complying with new federal Environmental Protection Agency water quality regulations. The Headworks Spreading Grounds, a 43-acre site adjacent to the Los Angeles River, will feature two below-grade concrete reservoirs, East and West, measuring 40 feet deep with 54 and 56-million-gallon storage capacities requiring over 170,000 cubic yards of concrete, a four-megawatt hydroelectric power plant to take advantage of the renewable energy developed by the reservoir’s high pressure and water flows, a flow regulating station with a flow capacity of 250 cubic feet per second, and a 96 inches by 6,600 feet trunk line with a 3,000-foot tunneling portion which the team must route to avoid nearby Forest Lawn Cemetary. The project constitutes several phases with staggered completion dates over a seven year period. The LA Department of Water and Power expects to place the East reservoir into service by November 2014. Webcor will also construct River Supply Conduit Unit 1A, which will connect to future units directly adjacent to the reservoirs. In addition, in order to establish environmental habitats and recreational facilities, Webcor will perform an ecosystem restoration to the area immediately surrounding the project.