Get to Know Washington Rock Quarries
Established in 1990, Washington Rock Quarries has become well known in the construction industry for producing high-quality crushed rock, sand, and soil products in standard and custom specs.
Located just outside of Puyallup, Washington, and 40 miles southeast of Tacoma, Washington Rock’s two mines produce millons of tons of aggregate products annually. Our aggregate source is approved by the Washington State Department of Transportation (WSDOT), and our products have been used by the US Army Corp of Engineers and the Federal Highways Division.
Washington Rock’s goal is to provide customers with quality materials at an affordable price. Our certified quality control process, state-of-the-art mining processes, and experienced team members make this possible. Click on the video below to learn more.
Mining Operations
Kapowsin Quarry is an open-surface basalt mine that sits just above the northeastern end of Lake Kapowsin. With nearly 350 million tons of material in reserve, the quarry is a trusted source for crushed rock and gravel, quarry spalls, riprap, and armor rock used in shoreline protection. View the WSDOT Aggregate Source Approval Report for Kapowsin Quarry here.
King Creek Pit is a sand and gravel pit located three miles from the quarry. The pit includes a high-capacity ALMIX aggregate drying and bagging plant as well as a state-of-the-industry washing plant. Our pit produces high volumes of topsoil and sand blends as well as specialty products like Armorstone® and infill sand. View the WSDOT Aggregate Source Approval Report for King Creek Pit here.
Quality Control Lab
Our quality control lab is one of the few ASTM- and AASHTO-certified labs in the region. Our quality control team continually samples and tests materials, assists in engineering new products, and helps our products meet clients’ stringent requirements.
Learn more about our quality control program in the video below.
Community Involvement
Learn more about our community involvement on Our Community page.
Industry Memberships
Washington Rock Quarries is proud of its membership with several professional associations, including the National Stone, Sand, and Gravel Association (NSSGA), the Washington Aggregates and Concrete Association (WACA), the National Utility Contractors Association (NUCA), the Western Washington Golf Course Superintendents Association (WWGCSA), the Northwest Turfgrass Association (NTA), and the National Bridge Preservation Partnership (NBPP).