Illinois Basin is a basin located in King County, Washington. It appears on the Mount Phelps USGS 7.5-minute topographic quadrangle. The nearest populated place is Nordrum (historical), approximately 6.8 miles to the S.
King County · Washington
Illinois Basin is a basin located in King County, Washington. It appears on the Mount Phelps USGS 7.5-minute topographic quadrangle. The nearest populated place is Nordrum (historical), approximately 6.8 miles to the S.