Gravel, Stone and Soil for Iowa County, IA
If you are building a drive, setting a patio base or cutting a drainage run, you need gravel, stone and aggregate delivery in Iowa County, IA. Iowa Rock Supply sells bulk material online and tips it on site with a dump truck.
Start with Class A roadstone, the 3/4 inch crushed limestone base course that binds and compacts. This is southern Iowa ground, and the clay under it does not take water, so the base and the drainage layer both matter.
Materials delivered in Iowa County
Class A roadstone is the standard Iowa base course. It is crushed limestone with the fines left in, and it is what county engineers and city entrance standards call roadstone.
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Order Class A Roadstone for drives, parking pads, shed bases and farm lanes.
When you need a coarser grade, 1 Inch Roadstone goes down under a finer surface course on a new drive, a soft spot or a lane that carries heavy equipment.
Sand and soil round out a job. Mason Sand goes into brick and block mortar, paver joints and horse arena footing.
Washed Sand beds and levels under slabs and pavers, and works as clean sand fill. Top Soil is screened black dirt, named for the dark prairie soils here, and it handles lawn repair, grading and bed prep.
For decorative work, River Rock dresses beds, borders and dry creek beds. 3/8" Natural Pea Gravel suits walkways, play areas and patio bedding.
Delivery across Iowa County
You order online, choose a quantity by the ton or by the yard, and pick a delivery date at checkout. Each product page has a calculator to help you size the load.
Then a dump truck arrives and tips the material in one pile on site.
Have the drop spot clear and reachable before the truck gets there. Bulk loads are heavy, and the pile lands where the truck can back in and tip.
Delivery covers Williamsburg, Marengo, Victor, North English, Amana, Ladora, Parnell, South Amana and Homestead, along with the rest of the county.
Ground conditions across Iowa County
Across the Southern Iowa Drift Plain, the ground is old pre-Illinoian till under a windblown loess mantle, usually 5 to 30 feet thick. Beneath that sits the Yarmouth-Sangamon paleosol, a thick, gummy grey clay that water will not move through.
That clay is why drives go soft at the bottom of a grade. The rolling ground drains at the surface, but the subsoil perches water instead of taking it, and spring rain on saturated clay is the worst of it.
This is Iowa's most eroded landscape. Streams cut deeply, hillslopes carry a fine texture of rills, and gully and stream bank erosion after heavy rain is the main reason rock goes in on slopes and outlets.
Riprap and clean rock are the materials for that work.
You get the longest working season in the state here, but clay soils need to dry before anything gets compacted. A wet spring pushes base work back several weeks.
Winters bring repeated freeze-thaw, milder than the north but still enough to heave gravel drives and lanes every spring. Frost depth is commonly 42 inches, and the local building official sets footing depth.
Choosing the right material
Iowa County sits on the Southern Iowa Drift Plain. Linn, Benton and Tama counties lie on the Iowan Surface, where loamy glacial till was planed down by cold-climate erosion under a thin, patchy loess cover.
That difference shows up in the ground itself. Iowan Surface till carries a residual stone line or pebble band near the surface, plus unusually large granite and quartzite erratics scattered through the fields, and limestone bedrock is shallow along the eastern edge.
On the Iowan Surface, shallow limestone and that stony band change what a base sits on. On the Drift Plain side, the gummy clay subsoil is the layer to plan around, and drainage matters as much as the base course.
For a compacted base, Class A roadstone is the choice. For water that needs to move, clean rock or 3/4 inch clean stone is the choice.
For bedding and joints, limestone screenings or mason sand.
Order gravel, stone and soil for your Iowa County project
Iowa Rock Supply handles driveways, parking pads, shed bases, farm lanes, drainage runs, stream bank armoring, paver bedding and lawn repair across Iowa County. Class A roadstone, clean rock, washed chips, sand, black dirt and river rock all arrive by dump truck and land in one pile.
Size your load on the product page, pick a delivery date at checkout, and place your order online.