Abandoned coal mines underlie at least 50,000 acres in western and central Washington, in both rural and urban areas. Some of these mines are near the surface and pose a risk to buildings or other structures from mine collapse.
Information about the location and condition of coal mines is necessary to identify hazardous areas and develop effective mitigation. Our extensive Washington State coal mine map collection and staff expertise are invaluable in guiding development in these areas. We work with local goverments to accurately locate mines and interpret mine maps.
For more information on coal resources in Washington, go to the Washington Geology Library catalog and search the Subject field on "coal".