Exploration no. 146001 is a Geotechnical (depth 20.8 feet) named: B-101 described in subsurface document no. 64068. The document, a report titled Geotechnical Conclusions and Recommendations Seattle Public Utilities - NPDES CSO 41 Outfall Pipe Rehabilitation was prepared by City of Seattle, Public Utilities, Geotechnical Engineering on 05-19-2010 for a Utility project.