Our Company

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 over 1 million tons of aggregate products annually. Our aggregates are approved for use by the Washington State Department of Transportation (WSDOT), 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.


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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.

Community Involvement

  • Classroom Earth Science Visits
    Washington Rock’s earth science program gives elementary school students a chance to experience rocks and minerals firsthand. In conjunction with Washington State’s Next Generation Science Standards, our presenter visits classrooms and teaches about rock classification. Students can feel and examine samples of sedimentary, igneous, and metamorphic rocks while learning about the ways they were formed.

    Our presenter, Brittany, also explains the differences between rocks and minerals and teaches students that minerals are in almost everything we touch. When Brittany tells classes that toothpaste contains rock dust, students in nearly every presentation threaten to never brush their teeth again!

    The presentation includes an overview of what takes place in a rock quarry and how mined resources are used in everyday life. Classes always enjoy watching a short video of quarry blasting, and they have fun learning about essential safety equipment. Brittany has visited almost forty classrooms since the program began in 2010.

    If you’re interested in having Brittany present about rocks and minerals in your classroom, please call our main office. Presentations are about 60 minutes.

  • Dozer Day
    At Dozer Day, kids can try out real dozers, excavators, and more with the help of a professional operator. Our Minecraft booth, complete with a sandbox table and trivia wall, will make another appearance at the Dozer Day event on June 2-3, 2018. Proceeds benefit local charities. Visit the Dozer Day website for ticket information.
  • Scholarships
    Washington Rock offers two scholarships every year to one young man and one young woman from Orting High School. The scholarship offers financial aid for the trade school of their choice.

    The J. R. Wilson Memorial Scholarship and the Steve A. Chism Memorial Scholarship were established in memory of our operations manager, J. R. Wilson, and our quality control assistant, Steve Chism. Both J. R. and Steve were hard workers whose service helped Washington Rock to grow into the successful business it is today. We hope that those who receive these scholarships will remember the importance of dedication and teamwork.
  • Washington State Spring Fair
    Each year, Washington Rock works with local suppliers to build a landscape display inside the Showplex. The goal of the display is to offer seating for adults, activities for kids, and inspiration for all. View last year’s display here.

    We will present another display at this year’s Spring Fair, April 19-22, 2018. Visit the Washington State Fair website for ticket information.

Business Partners
Washington Rock Quarries is proud of its work with several associations and companies throughout the Pacific Northwest.

Business-Partners