Washington County, IA Gravel and Landscape Rock Delivery

Iowa Rock Supply brings gravel, stone and aggregate delivery in Washington County, IA to driveways, farm lanes and job sites. Class A roadstone is the base most of that work begins with.

Spring rain on saturated clay is the hardest part of the season here.

Across the Southern Iowa Drift Plain, clay soils need to dry before anything gets compacted. A wet spring pushes base work back several weeks.

Materials Delivered in Washington County

Class A roadstone is the standard Iowa base course. It is crushed limestone with the fines left in, so it binds and compacts.

County engineers and city entrance standards call the same material roadstone.

Order Class A Roadstone for driveways, parking pads, shed bases and farm lanes. The coarser grade, 1 Inch Roadstone, goes under a finer surface course on a new drive, a soft spot or a lane that carries heavy equipment.

Washed, open graded stone is a different job. Clean Rock is washed and open graded, so water moves straight through it.

Use it for subdrains, drainage tile backfill, pipe bedding, septic rock and backfill behind retaining walls.

Delivery Across Washington County

You order online and choose a quantity by the ton or by the yard. Each product page has a calculator if you want to size the load before checkout.

Pick a delivery date at checkout and a dump truck tips the load on site.

Delivery covers Washington, Kalona, Wellman, Riverside, Ainsworth, Brighton, Crawfordsville and West Chester. A bulk delivery arrives as one tipped pile.

Have the drop spot clear and reachable by a dump truck before the date you pick.

Ground Conditions Across Washington County

This is Iowa's most eroded landscape. Streams cut deeply and hillslopes carry a fine texture of rills.

Gully and stream bank erosion after heavy rain is the main reason rock goes in on slopes and outlets.

Under the loess mantle, the Yarmouth-Sangamon paleosol is a thick, gummy grey clay that water will not move through. Farmers call working in it gumbo.

Ground like that drains at the surface but not below it, so water perches, runs off and leaves drives soft at the bottom of a grade.

A thin base course over that clay shows the failure fast. The fix is a compacted roadstone base with clean, open graded stone where water needs to move.

Riprap and revetment stone armor the slopes and outlets that take the runoff.

Choosing the Right Material

Johnson County and Henry County sit on the same Southern Iowa Drift Plain ground as Washington County. The till, the loess mantle and the gummy grey clay are the same, so the base and drainage choice does not change between them.

Louisa County is different. Its ground runs to sand, gravel, silt and clay on river terraces and floodplain, with sandy blow ground on the older terraces.

Sandy ground takes water far better than clay, so drainage there is less of a fight than it is on the Drift Plain.

Order Gravel and Rock for Washington County

Start with the calculator on the product page and settle your quantity by the ton or the yard. Then place the order online and pick your delivery date at checkout.

Iowa Rock Supply delivers Class A roadstone, clean rock, sand, topsoil and landscape rock across Washington County.