Clarke County, IA Gravel and Landscape Rock Delivery
Iowa Rock Supply delivers gravel, stone and aggregate delivery in Clarke County, IA to contractors and homeowners alike. Some buyers are building a new drive or pad, and some are patching a lane that has gone soft.
Class A roadstone is the crushed limestone base course that most of that work starts from.
This is the Southern Iowa Drift Plain, where old till sits under a windblown loess mantle. The clay beneath it does not take water, so it perches and runs off instead.
Ground Conditions Across Clarke County
Across the Southern Iowa Drift Plain, old pre-Illinoian till sits under a windblown loess mantle, usually 5 to 30 feet thick, with buried paleosols beneath. The Yarmouth-Sangamon paleosol is a thick, gummy grey clay that water will not move through.
That clay is what a thin base fails on. Water perches on the clay instead of draining through it, and the surface stone loses its support.
The fix is a compacted base course with the fines left in, so the material binds and holds together over the clay. Class A roadstone is that base course, and 1 inch roadstone is the coarser grade for a new drive or a lane that carries heavy equipment.
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 at outlets.
Clarke County gets the longest working season in the state, but clay soils need to dry before anything is compacted. A wet spring pushes base work back several weeks.
Cold winters bring repeated freeze and 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.
Materials Delivered in Clarke County
Class A roadstone is the standard Iowa base course: 3/4 inch crushed limestone with the fines left in, so it binds and compacts.
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Use it for driveways, parking pads, shed bases and farm lanes. It is also the course that goes under a finer surface layer.
1 Inch Roadstone is the coarser roadstone, laid under a finer surface course for a new drive, a soft spot or a lane that carries heavy equipment. Limestone Screenings are the fines, used for paver and flagstone bedding, joint filling and a fine top dressing over a compacted roadstone base.
Clean Rock is washed and open graded, so water moves straight through it. It goes in subdrains, drainage tile backfill, pipe bedding, septic rock and behind retaining walls.
3/4" Crushed Stone is a loose, free draining drive surfacing, plus pipe bedding and trench backfill. 3/8" Crushed Stone is washed chips for seal coat aggregate, fine drainage, paver joints and a thin top dressing.
Riprap covers stream bank and river bank armoring, culvert outlets, pond edges and slope protection against spring runoff. Section 4130 covers revetment stone, erosion stone and gabion stone by class letter, and Section 4123 covers modified subbase.
Delivery Across Clarke County
You order online and choose a quantity by the ton or by the yard. Each product page has a calculator to help size the load before you check out.
Pick a delivery date at checkout, and a dump truck tips the load on site in one pile. Delivery covers Osceola, Murray, Woodburn and the rest of the county.
Bulk loads are heavy, so the ground where the truck tips needs to be firm enough to hold it. On clay that has stayed wet, a load set on soft ground can sink before it is ever spread.
Choosing the Right Material
Warren County, Madison County and Union County all sit on the same Southern Iowa Drift Plain ground as Clarke County. Old pre-Illinoian till under a loess mantle, with the same gummy grey clay beneath that water will not move through.
The ground is the same, so the base and drainage choice is the same: a compacted base course with fines left in, and clean, open graded stone where water needs to move.
For a drive or pad, start with Class A Roadstone. Where the ground is soft or the lane carries heavy equipment, 1 Inch Roadstone goes underneath as the coarser course.
Where water has to drain, use Clean Rock or 3/4" Crushed Stone. For a finished look, River Rock and Large River Rock suit decorative beds, borders and dry creek beds, and 3/8" Natural Pea Gravel works for walkways and play areas.
For planting, Top Soil is screened black dirt for lawn repair and bed prep, while Fill Dirt raises grade and backfills low ground before a roadstone course goes down. Garden Soil is blended richer for raised beds and vegetable gardens.
Order Clarke County Gravel and Stone Online
Start with the quantity. Each product page has a calculator, and you order by the ton or by the yard, then pick a delivery date at checkout.