Exploration no. 146371 is a Test pit (depth 11.7 feet) named: TP-113 described in subsurface document no. 64156. The document, a report titled Geotechnical Infiltration Report Venema Natural Drainage Systems Project Seattle, Washington was prepared by City of Seattle, Public Utilities, Geotechnical Engineering on 03-01-2012 for a Roadway project.