CA-Humboldt Bay NWR - Gravel 1.5" minus road base gravel w/ fines 3/8" minus trail gravel w/ fines Materials will consist of virgin quarried aggregate (e.g., base rock), newly mined and sourced from local (sourced within approx. 100 miles) geological deposits. Recycled and/or washed river rock will not be accepted. See SOW in attached packet. Submit a copy of latest gradation analysis and test data for the materials to be supplied that meets the standards set in the SOW with the pricing. Send packets and questions to Robert_Sung@ios.doi.gov with 140F0S26Q0049 in the subject line.