GSI Concrete and Ready-Mix Manufacturing GSI Concrete and Ready-Mix Manufacturing Search | Advanced Search | New Members | Coupons and Discounts | All Categories Sort alphabetically by... Name City Central Pre-Mix Concrete Co. a CRH Company _ PO Box 3366Spokane, WA 99220 (509) 534-6221 Member Since: 1934 Learn More | Visit Site Knife River Prestress _ 7721 N Idaho Rd,Newman Lake, WA 99025 (509) 536-3300 Member Since: 2022 Learn More | Visit Site Interstate Concrete & Asphalt a CRH Company _ PO Box 3366Spokane, WA 99220 (509) 244-5421 Member Since: 2002 Learn More | Visit Site If your business isn't here, contact us today to get listed!