Exploration no. 146027 is a Test pit (depth 5.8 feet) named: TP-103 described in subsurface document no. 64139. The document, a report titled Geotechnical Report West Seattle Miniature Golf Infiltration Feasibility Project Seattle, Washington was prepared by City of Seattle, Public Utilities, Geotechnical Engineering on 10-01-2016 for a Park / recreation project.