Exploration no. 117681 is a Geotechnical (depth 50.5 feet) named: CR-2-00 described in subsurface document no. 48061. The document, a report titled Supplimental Geotechnical Reccomendations, SR-18 Maple Valley to Issaquah / Hobart Rd Cedar River Bridges was prepared by WA State Dept. of Transportation on 04-03-2003 for a Bridge project.