Map for Mutual Materials Co. Map for Mutual Materials Co. Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Division 32 - Exterior Improvements >> 32 10 00 Bases, Ballasts, and Paving Mutual Materials Co. 6721 E Trent AveSpokane Valley, WA 99212 | directions Chris Sergott (509) 922-4505 Visit Site