Order Gravel, Stone and Soil in Postville, IA

For gravel and aggregate delivery in Postville, IA, the ground under your project decides what goes on top of it. Across the Paleozoic Plateau, the driftless northeast, thin soil sits over limestone, dolomite, sandstone and shale, with bedrock shallow on the ridgetops.

Iowa Rock Supply delivers Class A roadstone, fill dirt and the rest of the bulk materials your drive, pad or drain needs. Start with what the ground is doing and work up from there.

Delivery to Postville and the Surrounding Area

Ordering happens online. Pick your material, set a quantity by the ton or by the yard, and choose a delivery date at checkout.

Each product page has a calculator if you want to size the load before you commit.

A dump truck arrives and tips the load in one pile at your site. That is the whole of it, so plan where the pile should land before the truck shows up.

Bulk delivery covers Postville and the rest of Allamakee County, including Waukon, Lansing, New Albin, Harpers Ferry and Waterville.

Materials for Postville Projects

Much of the work around here starts with grade. Building pads get raised, low spots get filled, and a sub-base goes down before anything else.

Fill dirt handles the raising, and Class A roadstone builds the compacted layer over it.

Class A roadstone is the standard Iowa base course, crushed limestone with the fines left in so it binds and compacts. It carries driveways, parking pads, shed bases and farm lanes.

On a new drive or a soft spot, coarser 1 inch roadstone goes underneath as a heavier first course.

For drainage, clean rock is washed and open graded, so water moves straight through it. It backfills subdrains and drainage tile, beds pipe, and sits behind retaining walls.

Where you want a loose, free draining surface, 3/4 inch clean stone works as drive surfacing and trench backfill.

Finishing materials sit on top of a compacted base. Limestone screenings bed pavers and flagstone and fill the joints between them.

Washed sand levels under slabs and pavers, and black dirt, which Iowa yards call screened topsoil, repairs lawns and preps beds.

Ground and Conditions in Postville

Thin soil over rock changes how a base behaves. There is little loose ground for water to sit in, so an under-built base shows its weakness fast once the spring thaw works into fractured rock and thin soil.

Karst is the other half of it. Water disappears into sinkholes, fractures and underground passages instead of running off, and springs run all year.

Steep valley sides push runoff down quickly after a storm, which is where drives and lanes get scoured.

Plan drainage before you plan surface. Clean rock under a drive or around a foundation gives water somewhere to go.

On the banks of the Upper Iowa and the other rivers cutting these narrow valleys, rip rap armors stream banks, culvert outlets and pond edges against that fast runoff.

Steep drives and switchback lanes set the working season. Work fits between the spring thaw and the fall freeze, and winter access on grades is why surfaces get topped up in the fall.

Frost is a real factor on these lanes. The figure Dubuque publishes is commonly 42 inches, but ask the local building official before you set any footing depth.

Order Class A Roadstone and Fill for Your Postville Project

Class A roadstone is the base most Postville drives, pads and lanes are built on, and fill dirt raises the grade underneath it. Choose your material, set the quantity, and pick a delivery date.

Place your order online and Iowa Rock Supply will bring the load to your site.