The Guy F. Atkinson Company of San Francisco was the contractor responsible for building the Mud Mountain Dam in Enumclaw, WA. They successfully completed the project in 1948 after facing delays due to World War II, constructing a 432-foot high earthfill dam with a storage reservoir capable of holding 106,000 acre-feet of water.
Working in three shifts, the company utilized 2.3 million cubic yards of sand, rock, and gravel to create the dam, which has effectively prevented massive flooding in South King County and North Pierce County. The dam's construction and subsequent modifications have safeguarded Puyallup Valley farmers from significant flood damage and saved an estimated $300 million in potential losses as of the year 2000.
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