R P C LLC.

The state insures R P C under workers' comp classes for landscape construction, stone masonry, trucking and construction estimating, which matches a stone supplier that also hauls and sets what it quarries. Spokane County permits since 2014 are mostly residential retaining walls, in Spokane, Veradale and Newman Lake, plus grading work in Mead. Public work goes back to 2001, usually as a subcontractor, for the Washington State Department of Transportation, the City of Spokane, Spokane Parks & Recreation, Spokane Public Schools, Liberty Lake and Richland. The state lists Terry and Marilyn Frost as principals, with James and Colleen Kinney added in 2025. The company describes itself as family-owned. This is a crew of more than fifty, built for big rock: hillside boulder walls, grading on sloped lots, and municipal or commercial landscape contracts where heavy equipment and stone come from the same outfit. Much of the work arrives through repeat customers, contractors and public bids, so scheduling tends to follow permits and project calendars rather than quick online booking. A small patio refresh or a few bags of decorative rock is a different kind of job than the one this business is set up for. Before a retaining wall or rock job starts, pin down the scope in writing: wall height and length, the stone being used, drainage behind the wall, and who pulls the county or city permit, since walls on Spokane's slopes often need one. Ask how equipment will reach the yard and who repairs lawn, sprinklers or driveway damage afterward. Agree on how changes get priced if the excavation hits basalt or wet soil. Finally, ask what the warranty covers on wall settling and how long it runs.