Railroad Ballast and Bulk Aggregates for Prosser, WA

Washington Rock Supply handles gravel and aggregate delivery in Prosser, WA, from 5/8 minus for a packed driveway to the coarse stone that holds a bank in place. Much of the ground here is windblown loess over basalt, and that fine silt sheds water instead of absorbing it.

That one fact shapes a lot of what you order. A base that stays put on dry, loose silt is not the same base that works where the ground stays wet.

Materials for Prosser Projects

Slope, swale and bank protection is where the biggest stone earns its place here. Water arrives fast on bare silt and leaves fast, and the sizes below are the ones that stand up to that.

For swale and ditch armour, bank toes and culvert outfalls, RipRap is the first size to consider.

Where a smaller stone would be carried off in a winter storm, Large River Rock is the better fit. It is rounded stone, used for feature beds and bank toes that need weight rather than interlock.

Round rock does not lock together, so keep it out of anything structural.

For rail spurs, yard track and heavy equipment pads, ask for Railroad Ballast in full.

Under a drive, parking area or slab, 1 1/4 Minus is the structural course, placed below the top course. It is also called crushed surfacing base course, or CSBC, and it carries load where the ground stays soft.

On top of that, 5/8 Minus packs hard and sheds water instead of soaking it up. The fines are left in, which is what makes it compact.

It is the Washington default surfacing course, and quarries here also list it as crushed surfacing top course, or CSTC.

When the problem is water sitting rather than running off, the answer changes. Drain Rock is washed with no fines, so it keeps its voids and lets water move where a perched water table sits.

Ground and Conditions in Prosser

Across the Columbia Basin, Yakima Valley and the channeled scablands, the working season is long on either side of a hard winter. Eastern Washington's wet weather season for erosion control runs October 1 through June 30.

That window matters for timing a delivery. Once snow falls or the ground freezes, placing and compacting base material stops being practical, so the granular work wants to be finished before then.

Rainfall is scarce for much of the year, and then it arrives all at once. Dry, loose silt sheds a cloudburst rather than absorbing it, and short violent runoff cuts rills and gullies in bare ground.

Wind does its own work on bare, dry silt, and irrigation runoff moves soil too. Cover and coarse stone are how you keep a slope or a ditch from moving.

Ground that freezes properly, unlike west of the Cascades, means frost heave in an unbound base is something to design for. Frost depth figures are set by the county or city building department and run deeper with elevation, so check with the authority having jurisdiction for Prosser.

Delivery to Prosser and the Surrounding Area

Washington Rock Supply covers Prosser and the rest of Benton County, including Kennewick, Richland, West Richland and Benton City. You order online and a dump truck tips the load on site.

Choose your quantity by the ton or by the yard. Each product page has a calculator if you want to size the load before you check out.

Pick your delivery date at checkout, and the truck arrives on that date. Enough room at the drop point for a truck to tip and pull away is worth checking before you order.

Order Bulk Gravel and Stone for Prosser

From RipRap for a swale to 5/8 Minus for a driveway, Washington Rock Supply delivers bulk gravel, sand and topsoil across Prosser and Benton County. Order online, choose your quantity and pick a delivery date at checkout.