Bulk Gravel and Stone Delivery in Linn County, IA

Iowa Rock Supply handles gravel, stone and aggregate delivery in Linn County, IA. The base material here is Class A roadstone, the crushed limestone with the fines left in that binds and compacts into a drive, a parking pad or a farm lane.

Linn County sits on the Iowan Surface, where loamy glacial till was planed down by cold-climate erosion. That leaves a thin, patchy loess cover and a pebble band near the surface.

Materials Delivered in Linn County

Class A roadstone is the standard base course in Iowa. It is 3/4 inch crushed limestone with the fines left in, so it binds and compacts.

County engineers and city entrance standards call the same material roadstone. Order it for driveways, parking pads, shed bases and farm lanes.

See Class A Roadstone.

1 inch roadstone is the coarser grade, also called 1 inch minus. Use it for a new drive, a soft spot or a lane that carries heavy equipment, laid under a finer surface course.

See 1 Inch Roadstone.

Clean rock is washed and open graded, so water moves straight through. Use it for subdrains, drainage tile backfill, pipe bedding, septic rock and backfill behind retaining walls.

See Clean Rock.

Riprap, also called revetment stone, protects stream banks, culvert outlets, pond edges and slopes against spring runoff. Section 4130 covers revetment stone by class letter.

See Riprap.

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

See Limestone Screenings.

Washed sand beds and levels under slabs and pavers, and works as sand fill where a clean, free draining grade is wanted. See Washed Sand.

Black dirt is screened topsoil, named for the dark prairie soils the state is known for. Use it for lawn repair, grading and bed prep.

See Top Soil.

Ground Conditions Across Linn County

Across the Iowan Surface, drainage networks are well established but stream gradients are low. Water moves slowly, and pockets of the old wetland ground still hold water.

Limestone aquifers keep rivers running in dry spells and can put groundwater close to the surface.

That slow water shapes the work. A drive or pad on low ground wants a clean, open graded layer so water can move, not a fines-bearing material that holds it.

Erosion on the Iowan Surface comes as sheet wash on long, low slopes, gully cutting where runoff concentrates, and bank scour after heavy rain and thaw. Riprap and clean rock are the usual answers at culvert outlets and along banks.

The working season runs from the time frost leaves and the low gradient ground has drained until the fall freeze. Low spots stay soft well after the uplands are ready, so timing a delivery matters.

Hard winters and repeated freeze-thaw lift gravel drives, walks and slabs each spring. Frost depth is commonly 42 inches, and the local building official sets footing depth.

Delivery Across Linn County

You order online and a dump truck tips the load on site. Coverage runs across the county, including Cedar Rapids, Marion, Hiawatha, Mount Vernon, Robins, Fairfax, Center Point, Ely, Lisbon, Central City, Palo, Springville, Alburnett and Coggon.

Quantities are ordered by the ton or by the yard. Each product page has a calculator, and you pick a delivery date at checkout.

The truck tips the load in one pile, so pick a spot that keeps the pile clear of the work. Plan for the pile to sit where you want the material to end up.

Choosing the Right Material

Johnson County and Iowa County sit on the Southern Iowa Drift Plain, where old pre-Illinoian till lies under a windblown loess mantle. Beneath it is the Yarmouth-Sangamon paleosol, a thick, gummy grey clay that water will not move through.

Linn County ground is different. The Iowan Surface is loamy till planed down by cold-climate erosion, with a thin loess cover and shallow limestone bedrock along the eastern edge.

There is no gummy clay layer under the whole county.

On the Drift Plain, a base course has to shed water before that clay stops it. On the Iowan Surface, the till and shallow bedrock drain better, so the base choice leans on the surface and the slope.

Buchanan County shares the Iowan Surface, so its ground is the same as Linn County's. The same base and drainage choices apply on both sides of the line.

Order Gravel and Stone in Linn County

Iowa Rock Supply delivers Class A roadstone, clean rock, sand, topsoil and more across Linn County, from Cedar Rapids and Marion to Lisbon and Coggon. Order online by the ton or by the yard, size the load with the calculator, and pick your delivery date at checkout.