Should I order material by the ton or by the yard?

Both work. Bulk aggregate is ordered by the ton or by the yard, and each product page has a calculator to size the load. Pick the unit you are used to working in and match it to the quantity you need.

Which stone is best for drainage in Marion County?

Clean rock is washed and open graded, so water moves straight through it. Use it for subdrains, drainage tile backfill, pipe bedding and wall backfill. On this ground, where clay subsoil holds water, an open graded stone is what lets a wet spot drain.

What do I need to have ready for a bulk delivery?

Have the drop spot clear and reachable. A dump truck tips the load in one pile, so leave room for it. Order by the ton or the yard, size the load with the calculator, and pick a delivery date at checkout.

Marion County, IA Aggregate and Rock Delivery

Order gravel, stone and aggregate delivery in Marion County, IA online. Iowa Rock Supply sells bulk material by the ton or by the yard and delivers it across the county.

Start with Class A roadstone, the crushed limestone base Iowa calls roadstone. It carries the fines that bind and compact, so it holds up under a drive, a pad or a farm lane.

Materials delivered in Marion County

Class A roadstone is the base course for drives, parking pads, shed bases and farm lanes.

11. County engineers and city entrance standards write the same material as Class A roadstone.

Section 4123 covers modified subbase, and Section 4130 covers revetment stone, erosion stone and gabion stone by class letter. Those are how material is specified in Iowa.

Below the base, the supporting materials cover drainage, bedding, soil and decorative work. Each one has a job it does well.

Delivery across Marion County

Order online and choose a quantity by the ton or by the yard. A dump truck tips the load in one pile at your site.

Delivery covers Pella, Knoxville, Pleasantville, Melcher-Dallas, Bussey, Harvey, Hamilton, Swan, Columbia, Otley and Tracy.

Each product page has a calculator. Size the load there, then pick a delivery date at checkout.

Ground conditions across Marion County

Across the Southern Iowa Drift Plain, old pre-Illinoian till sits under a windblown loess mantle, usually 5 to 30 feet thick. Beneath it are buried paleosols, including the Yarmouth-Sangamon paleosol, a thick gummy grey clay that water will not move through.

Farmers here call working in that clay gumbo. Ground like this drains at the surface, but the subsoil does not take water, so it perches and runs off.

Drives go soft at the bottom of a grade, where runoff collects on saturated clay. Spring rain on wet 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.

Clay soils need to dry before anything gets compacted, so a wet spring pushes base work back several weeks. Frost heaves gravel drives and lanes every spring.

Footing depth is set by the local building official.

Choosing the right material

Ground changes what a base and a drainage layer have to do. Polk County sits on the Des Moines Lobe, the youngest glacial ground in Iowa, where thick pebbly loam till runs 45 to 60 feet deep with sand and gravel along old meltwater channels.

That ground differs from Marion County's.

Warren County and Jasper County share Marion County's ground region. The old till, the loess mantle and the gummy clay subsoil are the same there.

On Marion County ground, water perches on clay rather than soaking away. A compacted roadstone base carries the load, and a clean, open graded stone beside it gives water somewhere to go.

Riprap protects the slopes and outlets where runoff cuts.

Order bulk rock and stone in Marion County

Size your load by the ton or the yard with the calculator on each product page, then choose a delivery date at checkout. Iowa Rock Supply delivers bulk gravel, stone, sand and soil across Marion County, from Pella to Knoxville and the smaller towns between.

Place your order online when you are ready.

Bulk Gravel and Stone Delivery in Marion County, IA