Gravel, Stone and Soil for Pottawattamie County, IA

Iowa Rock Supply handles gravel, stone and aggregate delivery in Pottawattamie County, IA. Class A roadstone is the base most local work starts from, and it is the material to know first.

Timing matters as much as the material here. Hill work waits for the silt to dry, because wet loess will not hold a cut, and bottomland work waits for the spring rise to pass.

Ground Conditions Across Pottawattamie County

Two different water problems sit in one county. On the hills, a dense network of narrow ravines and steep gullies sheds water fast.

On the bottoms, flat ground with a high water table and river flooding is the constraint. That is why bottomland drives get built up on rock.

Loess erodes as almost nothing else does. It stands in near vertical faces when dry, cuts deep, steep sided gullies under runoff, and collapses or slides when it gets saturated.

Cold winters bring repeated freeze-thaw that heaves drives and loosens the silt faces of cuts and banks as the ground thaws. Footing depth is set by the local building official.

Wind blown silt more than 60 feet deep, and 150 to 200 feet in places, forms a narrow band of steep ridges along the full length of the Missouri valley in this part of the state. Broad, flat, sandy and silty river bottom runs west of the bluff line.

Both sides of that line need a drainage layer, and both need a base that compacts. Plan the grading before you plan the surface.

Materials Delivered in Pottawattamie County

Class A roadstone is the standard Iowa base course. It is crushed limestone with the fines left in, so it binds and compacts under a drive, a parking pad, a shed base or a farm lane.

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

11, and Section 4123 covers modified subbase. Those are how material is specified in Iowa.

For a new drive, a soft spot or a lane that carries heavy equipment, 1 inch roadstone goes down first as a coarser course under a finer surface.

Limestone screenings bed pavers and flagstone and fill joints. They also work as a fine top dressing over a compacted roadstone base.

3/8 inch washed chips are the seal coat aggregate Iowa quarries sell as washed chips. They also suit fine drainage, paver joints and a thin top dressing.

Fill dirt raises grade, fills low ground and backfills before a roadstone course goes down. Garden soil is blended richer than plain black dirt for raised beds and vegetable gardens.

Delivery Across Pottawattamie County

Bulk material arrives by dump truck, and the truck tips the load in one pile on site. Have the drop spot clear and reachable before the truck arrives.

Order online. You choose a quantity by the ton or by the yard, size the load with the calculator on each product page, and pick a delivery date at checkout.

Iowa Rock Supply delivers across the county, including Council Bluffs, Carter Lake, Oakland, Avoca, Neola, Treynor, Walnut, Underwood, Carson, Minden, Crescent, Hancock, Macedonia and McClelland.

On the hills, a truck needs a firm, dry approach to reach the pile spot. On the bottoms, the ground is flat but soft, so pick a spot that holds up.

Choosing the Right Material

Pottawattamie County sits on Loess Hills and the Missouri River valley ground: wind blown silt over river bottom. Cass County, Shelby County and Montgomery County all sit on the Southern Iowa Drift Plain.

That ground is old pre-Illinoian till 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, and farmers call working in it gumbo.

So the ground itself differs. Those counties have clay under a thinner loess cover, and Pottawattamie County has deep silt and river bottom instead.

On heavy clay, water sits on top of the paleosol and a drainage layer carries it away. On deep loess, the silt sheds water fast off a steep face and slides when saturated.

For a base on either ground, Class A roadstone compacts into a bound course. For water that has to move, clean rock and 3/8 inch washed chips are open graded and free draining.

Order Gravel, Stone and Soil in Pottawattamie County

Iowa Rock Supply delivers Class A roadstone, gravel, sand, topsoil and decorative stone across Pottawattamie County. Drives, parking pads, shed bases, farm lanes, drainage runs, patio bedding, lawn repair and commercial work are all served here.

Order online, choose your quantity by the ton or by the yard, and pick a delivery date at checkout.