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

If you are pricing gravel, stone and aggregate delivery in Delaware County, IA, the first question is usually which base to put down. Iowa Rock Supply sells Class A roadstone and the rest of the bulk materials by the ton, ordered online.

Class A roadstone is the crushed limestone base course with the fines left in, and it binds and compacts under a drive. It is the same material county engineers and city entrance standards call roadstone here.

Delivery across Delaware County

You order online, size the load by the ton or by the yard, and pick a delivery date at checkout. Each product page has a calculator for working out quantity.

A dump truck then tips the load on site.

Coverage runs across the county, including Manchester, Earlville, Hopkinton, Colesburg, Delhi, Ryan, Greeley, Dundee, Delaware and Masonville.

Bulk delivery is one tipped pile. The driver does not place or spread it, so pick a spot that suits the job before the truck arrives.

Materials delivered in Delaware County

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

11 and Class C gravel to Gradation No. 10.

1 inch roadstone is the coarser grade, laid under a finer surface course on a new drive or a lane that carries heavy equipment. Limestone screenings go under pavers and flagstone, fill joints and top dress a compacted roadstone base.

Clean rock is washed and open graded, so water moves straight through it. It works for subdrains, drainage tile backfill, pipe bedding, septic rock and backfill behind retaining walls.

Washed chips are the 3/8 inch washed stone used for seal coat aggregate, fine drainage and paver joints. Riprap, also called revetment stone, armors stream banks, culvert outlets, pond edges and slopes against spring runoff.

Sand, soil and mulch round out the list. Mason sand goes into brick and block mortar and paver joints, washed sand beds and levels under slabs, and screened topsoil, sold here as black dirt, handles lawn repair and bed prep.

Decorative options include River Rock for beds and dry creek beds, and 3/8" Natural Pea Gravel for walkways, play areas and small drainage runs.

Ground conditions across Delaware County

This county spans more than one ground region, and each behaves differently. Across the Iowan Surface, loamy glacial till was planed down by cold-climate erosion, with a thin and patchy loess cover and a pebble band near the surface.

Limestone bedrock is shallow along the eastern edge of that ground. In the driftless northeast, thin soil sits over limestone, dolomite, sandstone and shale, and bedrock is shallow on the ridgetops.

Water behaves differently in each. On the Iowan Surface, stream gradients are low, so water moves slowly and low spots stay soft.

In the driftless northeast, karst sends water into sinkholes and fractures, and steep valley sides shed runoff fast after a storm.

That drives material choice. Clean rock gives water a path down through the subdrain or behind a wall, while roadstone compacts into a bound base for a drive.

Work starts once frost is out and the ground has drained, and runs to the fall freeze. Repeated freeze-thaw lifts gravel drives, walks and slabs each spring.

Choosing the right material

Delaware County's driftless northeast shares its ground with Dubuque County and Clayton County, where thin soil over limestone and dolomite leaves bedrock shallow on the ridgetops.

That ground changes the drainage choice. Where soil is thin and water drops into fractures, clean rock and riprap matter more than a deep fines-bearing base.

Buchanan County sits on the Iowan Surface, the same loamy glacial till and shallow eastern limestone bedrock found on this side of the county. The base choice there looks much like it does here.

Order Class A Roadstone and Bulk Aggregate in Delaware County

Iowa Rock Supply delivers gravel, stone, sand, soil and mulch across Delaware County, from Manchester and Earlville to Colesburg, Greeley and the surrounding towns. Order by the ton or by the yard, size the load on the product page, and pick your delivery date at checkout.