On November 3, 2006, a Puget Sound Energy generator was mechanically overfilled causing a diesel fuel release that reached Silver Creek and associated wetlands within the White River Watershed, in the Mt. Baker-Snoqualmie National Forest below the Crystal Mountain Ski Area in Pierce County, Washington. Approximately 18,000 gallons of diesel fuel spilled onto the generator pad and downhill towards a drainage ditch that flows to Silver Creek. Soils and groundwater within the Mt. Baker-Snoqualmie National Forest were contaminated. Approximately 14 acres of wetlands and 5-6 miles of Silver Creek were affected. Diesel entering Silver Creek likely discharged into the White River.