Retaining walls, concrete and hardscaping built for Inland Northwest slopes, soils and freeze-thaw.
Guides
How this work actually gets specified, costed and built — and the problems worth designing around. Written from public sources, with the references on every page.
Section R404.4 draws the line with two numbers and a safety factor. What unbalanced fill means, why 24 inches can matter more than 48, and what a fence on top changes.
Read the guide →A retaining wall is built out of an excavation, and the excavation is what the federal rules govern. What OSHA requires behind the wall, and what it means for your quote.
Read the guide →Glacial floods left gravel, cobbles and boulders under the valley, and water moves through it at up to 60 feet a day. That helps a retaining wall — until the backfill undoes it.
Read the guide →Call (509) 351-7634 or request a callback — whichever is easier.