Lake Mayfield is a reservoir located near Mossyrock, Washington, in Lewis County. It was created by Mayfield Dam on the Cowlitz River, one of the dams in the Columbia River watershed. The Mayfield Dam was constructed in 1963 as a concrete arch and gravity dam. At 250 feet high and capable of generating 162 megawatts, it supplies Tacoma Powe…
Lake Mayfield is a reservoir located near Mossyrock, Washington, in Lewis County. It was created by Mayfield Dam on the Cowlitz River, one of the dams in the Columbia River watershed. The Mayfield Dam was constructed in 1963 as a concrete arch and gravity dam. At 250 feet high and capable of generating 162 megawatts, it supplies Tacoma Power with a large percentage of its entire hydroelectric power supply, second only to Mossyrock Dam.
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