Buy Clean Rock in Grinnell, IA

Iowa Rock Supply handles gravel and aggregate delivery in Grinnell, IA. The working season here runs long, but a wet spring on Southern Iowa Drift Plain clay pushes base work back until the ground dries.

Class A roadstone is the crushed limestone base course that gets a drive, a parking pad or a farm lane started. Order online and a truck tips the load on your site.

Materials for Grinnell Projects

Base and driveway surfacing is where most ground work starts, and Class A roadstone leads it. It is crushed limestone with the fines left in, so it binds and compacts into a firm surface for drives, parking pads, shed bases and farm lanes.

For a new drive, a soft spot or a lane that carries heavy equipment, 1 inch roadstone is the coarser grade. It goes down under a finer surface course.

Topping a drive that has thinned out calls for Driveway Gravel over a compacted roadstone base.

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

That makes it the right stone for subdrains, drainage tile backfill, pipe bedding, septic rock and backfill behind retaining walls.

Limestone Screenings are the fines. They bed pavers and flagstone, fill joints and dress the top of a compacted roadstone base.

3/8" Crushed Stone is washed chips, used for seal coat aggregate, fine drainage and paver joints.

Sand, soil and decorative stone round out a project. Mason Sand mixes brick and block mortar and beds paver joints.

Top Soil is screened black dirt for lawn repair, grading and bed prep. River Rock is rounded gravel for decorative beds, borders and dry creek beds.

Ground and Conditions in Grinnell

Across the Southern Iowa Drift Plain, old till sits under a windblown loess mantle, with buried paleosols beneath. The Yarmouth-Sangamon paleosol is a thick, gummy grey clay that water will not move through.

Ground here rolls and drains at the surface, but the clay subsoil does not take water. It perches, runs off and leaves drives soft at the bottom of a grade.

Spring rain on saturated clay is the worst of it.

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.

That is where rip rap and clean stone earn their place. Riprap armors stream banks, culvert outlets, pond edges and slopes against spring runoff.

Clay soils need to dry before anything gets compacted, so a wet spring pushes base work back several weeks. Cold winters bring repeated freeze and thaw, which heaves gravel drives and lanes every spring.

Delivery to Grinnell and the Surrounding Area

Bulk material arrives by dump truck and tips in one pile on your site. Have the drop spot clear and reachable before the truck arrives.

The driver tips the load and leaves it where it lands.

Order online and choose your quantity by the ton or by the yard. Each product page has a calculator if you want to size the load before checkout, and you pick a delivery date at checkout.

Grinnell sits in Poweshiek County, and delivery covers the surrounding area, including Brooklyn, Montezuma, Deep River, Malcom and Searsboro.

Order Aggregate Delivery in Grinnell

Iowa Rock Supply delivers Class A roadstone, clean rock, limestone screenings, sand, black dirt and decorative stone for drives, pads, drainage, beds and grading around Grinnell. Order online, size your load, and pick a delivery date at checkout.