U S Government--cowlitz Falls Fish Facility, Mineral Mineral, WA 98355 Phone : (360) 492-5383 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Mineral 100 Washington St Mineral, WA 98355 Phone : (360) 492-5383 Business Category Post Offices Toll-Free           (800) ASK-USPS U S Government--postal Service, Mineral Mineral, WA 98355 Phone : (360) 492-5383 Business Category Government Offices-Federal Government Offices & Public Schools United States Government--u S Postal Service 100 Washington St Mineral, WA 98355 Phone : (360) 492-5383 Business Category Government Offices-Federal Government Offices & Public Schools