What is the difference between topsoil and fill dirt?

Top soil is screened black dirt, the dark prairie soil Iowa yards use for lawn repair, grading and bed prep. Fill dirt is unscreened material used to raise grade, fill low ground and backfill before a roadstone course goes down. Top soil feeds plants; fill dirt builds up the ground underneath them.

What is Class A roadstone and what is it used for in Hamilton County?

Class A roadstone is 3/4 inch crushed limestone with the fines left in, so it binds and compacts into a firm base course. In Iowa, Section 4120 defines the gradation, and county engineers and city entrance standards write it as Class A roadstone. It goes under driveways, parking pads, shed bases and farm lanes.

How deep should a gravel driveway base be in Hamilton County?

Depth depends on your ground, the load the drive carries and how the site drains. Hamilton County sits on heavy loam till with poor natural drainage, so a soft or wet subgrade needs more consideration than a firm one. Each product page has a calculator to help size the load you order.

Hamilton County, IA Aggregate and Rock Delivery

For gravel, stone and aggregate delivery in Hamilton County, IA, Iowa Rock Supply is built for the work you already have planned. A driveway, a shed pad, a patio base or a drainage run all start with the right material.

Class A roadstone is the base most of that work sits on here. It is crushed limestone with the fines left in, and it packs down into a firm, bound surface.

Materials Delivered in Hamilton County

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

Delivery Across Hamilton County

Bulk material arrives by dump truck and is tipped in one pile on site. Have the spot clear and reachable before the truck arrives, with room for it to pull in and out.

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 if you want to size the load.

Iowa Rock Supply delivers across Hamilton County, including Webster City, Stratford, Ellsworth, Stanhope, Williams, Blairsburg, Kamrar and Jewell.

Ground Conditions Across Hamilton County

Hamilton County sits on the Des Moines Lobe, the youngest glacial ground in Iowa. That ground is thick, compact pebbly loam till of the Dows Formation, with sand and gravel along old meltwater channels and hummocky, stony ground on the moraine ridges.

This is pothole country. The drainage network is young and inefficient, and kettles and closed depressions hold water.

Much of the ground only drains at all because it is tiled, and snowmelt and spring rain sit on the surface where the ground below is still frozen.

Erosion here is less about slope and more about ditch and tile outlet scour and washouts where runoff concentrates on the moraine ridges. Riprap and clean rock handle those spots.

Compaction waits for the frost to come out and for the flat ground to shed its spring water. Base and paver work runs from late spring to the fall freeze, and a wet spring shortens that window.

Choosing the Right Material

Franklin County and Story County sit on the same Des Moines Lobe ground as Hamilton County. The soil, the till and the drainage behave the same way, so the same material choices carry over.

Hardin County spans more than one ground region, covering both the Des Moines Lobe and the Iowan Surface. Where the ground changes, drainage and base choices can differ from what works on the lobe.

Order Roadstone, Gravel and Sand for Your Hamilton County Project

Iowa Rock Supply delivers Class A roadstone, gravel, sand, topsoil and decorative stone across Hamilton County. For building a drive, setting a patio base or running drainage, the material you need is a few clicks away.

Order online and get it delivered.

Class A Roadstone, Sand and Gravel Delivery in Hamilton County, IA