Address: 18825 SE Maple Valley Highway, Maple Valley. The Pacific Coast Coal Company administration building is the only intact structure associated with the once-active coal industry in the Cedar River Valley between Renton and Maple Valley. In the early 1930s, the Pacific Coast Coal Company was the top coal producing facility in the state, employing nearly 300 people. The slope mine operation was located on the hillside behind the structure. The administration and shop building was constructed in 1927 as a combination office and machine shop for the coal mine. The long rectangular two-story post and beam industrial building features large windows to admit light into the workspaces, corrugated galvanized iron siding, and a flat roof. When the mine closed in 1941, the large washery, tramway, trestle, and railroad were dismantled.