Bulk Gravel Delivery to Coralville, IA

If you are planning gravel and aggregate delivery in Coralville, IA, the job usually starts with a base. Iowa Rock Supply sells Class A roadstone, the crushed limestone base course with the fines left in so it binds and compacts.

Whether the work is a drive, a patio base or a drainage run, the material has to fit the ground it sits on. On the Southern Iowa Drift Plain, that ground is clay under a loess mantle.

Ground and Conditions in Coralville

A thin base fails first at the edges. Water gets under the stone, the clay below will not take it, and the surface breaks up.

That is the pattern across the Southern Iowa Drift Plain, where old till sits under a windblown loess mantle.

Beneath that is a buried paleosol, a thick grey clay that water will not move through. Local farmers call working in it gumbo.

On a gravel drive, that same clay perches water, sheds it downhill, and leaves the bottom of a grade soft.

Spring rain on saturated clay is the worst of it. The fix is a base course that binds and compacts rather than a loose stone that lets water pool at the contact.

This is also the most eroded landscape in Iowa. Streams cut deep, hillslopes carry rills, and gully and stream bank erosion after heavy rain is a common reason rock goes in on a slope or at an outlet.

Cold winters bring repeated freeze and thaw, milder than northern Iowa but still enough to heave gravel drives each spring. Footing depth in this region is commonly 42 inches, and the local building official sets the depth that applies to your permit.

The working season here is the longest in the state. Clay still has to dry before anything gets compacted, so a wet spring can push base work back several weeks.

Materials for Coralville Projects

The material under pavers and flatwork is what holds the surface flat. In Coralville that usually means a compacted base, a bedding layer, and a clean stone where water needs to move.

Class A Roadstone is the standard Iowa base course, also called 3/4 inch roadstone or road rock. It is crushed limestone with the fines left in, used for driveways, parking pads, shed bases and farm lanes.

Limestone Screenings, also called 3/8 inch minus screenings, are the bedding layer. They bed pavers and flagstone, fill joints, and top dress a compacted roadstone base.

Washed Sand levels and beds under slabs and pavers, and works as sand fill where a clean, free draining grade is wanted. Mason Sand is the masonry sand for brick and block mortar and paver joints.

For a new drive or a soft spot, 1 Inch Roadstone is the coarser grade, laid under a finer surface course. Driveway Gravel tops an existing drive or lane that has thinned out.

Clean, open graded stone belongs where water has to pass through. Clean Rock, sold as clean stone by the inch, goes into subdrains, drainage tile backfill, pipe bedding and behind retaining walls.

Delivery to Coralville and the Surrounding Area

Quantities are ordered by the ton or by the yard, so the first step is deciding which one fits how you measured. Each product page has a calculator if you want to size the load from your own numbers before checkout.

You order online, pick a delivery date at checkout, and a dump truck tips the load on site in one pile. Coralville sits in Johnson County, and we also deliver to Iowa City, North Liberty, Tiffin, Solon and Lone Tree.

Material arrives as bulk aggregate, so the drop point needs to be somewhere a truck can reach and tip. Once it is down, it is ready to work into the job you planned it for.

Questions About Gravel and Aggregate in Coralville

What gravel is best for a driveway in Coralville?

Class A roadstone is the Iowa base course for a driveway, because the fines left in the crushed limestone let it bind and compact. Below it, a coarser 1 inch roadstone helps over a soft spot or a lane that carries heavy equipment.

Top a thinned drive with driveway gravel over a compacted base. On the clay here, a base that binds beats a loose stone that lets water sit.

How much material will my project need?

Quantities are ordered by the ton or by the yard, so it depends on the area you are covering and the depth you want. Each product page has a calculator that works from your own numbers.

Measure the area first, decide the depth, then size the load before you check out. If the ground is soft or the grade is steep, the base may need to be deeper.

Order Bulk Gravel and Aggregate in Coralville

Size your load by the ton or the yard with the calculator on the product page, then choose your material and a delivery date at checkout. Iowa Rock Supply delivers Class A roadstone, bedding sand and clean stone to Coralville and Johnson County.

Start your order online when you know your quantity.