Bulk Material Delivery in Denison, IA

For gravel and aggregate delivery in Denison, IA, start with the water. On the Southern Iowa Drift Plain the clay subsoil does not take water, so it perches and runs off.

Iowa Rock Supply delivers Class A roadstone by the ton, plus the coarse stone that slows runoff on slopes and banks.

Materials for Denison Projects

Start coarse. Slope, swale and bank protection calls for large angular stone that stays put when water hits it.

Riprap, also called revetment stone, goes on stream banks, culvert outlets and pond edges.

Under that, clean rock handles the moving water. It is washed and open graded, so water passes straight through.

• Riprap for stream bank and river bank armoring, culvert outlets, pond edges and slope protection against spring runoff.
• Clean Rock for subdrains, drainage tile backfill, pipe bedding, septic rock and backfill behind retaining walls.
• #4 Crushed Stone for heavy drainage, construction entrances and trench bottoms.
• Railroad Ballast for track beds, heavy hard standing and severe drainage where large, angular stone is wanted.

Then the base courses. Class A roadstone is the 3/4 inch crushed limestone with the fines left in, so it binds and compacts under drives, parking pads and farm lanes.

1 inch roadstone is the coarser grade for a new drive, a soft spot, or a lane that carries heavy equipment.

Round out the fine end. Limestone screenings bed pavers and flagstone and fill joints.

3/8 inch washed chips top dress and seal. Class A Roadstone, 1 Inch Roadstone and Limestone Screenings cover most of that work.

Delivery to Denison and the Surrounding Area

Order online. Pick your quantity by the ton or by the yard, check the calculator on each product page if you want the load sized before you commit.

Choose your delivery date at checkout. A dump truck tips the load on your site in one pile.

Delivery reaches Denison and the rest of Crawford County, including Schleswig, Manilla, Vail, Charter Oak and Dow City.

Ground and Conditions in Denison

Time the delivery around the working season. This is the longest working season in the state, but clay soils have to dry before anything gets compacted.

A wet spring pushes base work back several weeks. Plan for the window, not the calendar.

The ground is old pre-Illinoian till under a windblown loess mantle, with the Yarmouth-Sangamon paleosol below it. That paleosol is a thick, gummy grey clay that water will not move through.

Local crews call working in it gumbo.

So drives go soft at the bottom of a grade, and water has nowhere to go but across the surface. Coarse stone at the outlet and a clean drainage layer under the roadstone are how you answer that.

Frost moves things too. Southern Iowa sees repeated freeze-thaw, milder than the north but still enough to heave gravel drives and lanes every spring.

In Crawford County the frost depth is commonly 42 inches, and the local building official sets footing depth.

Order Bulk Stone for Denison Sites

Iowa Rock Supply delivers Class A roadstone, clean rock, riprap and the rest of the bulk lineup across Denison and Crawford County. Choose your material, size the load on the calculator, and set your delivery date at checkout.

Order online when your site is ready.