Exploration no. 72288 is a Boring / probe (depth 5 feet) named: B-8 described in subsurface document no. 15399. The document, a report titled Avondale Rd NE, Redmond City Limits to NE 132nd St was prepared by King County, Dept. of Public Works, Div. of Roads and Engineering on 06-30-1987 for a Roadway project.