Bulk Aggregates for Patios in Colbert, WA

Order gravel and aggregate delivery in Colbert, WA by the ton or the yard. Washington Rock Supply delivers bulk material across Spokane County.

Start with 5/8 minus, the crushed surfacing top course this market calls CSTC. It packs hard under a patio or a shop slab.

The ground here is Ice Age flood gravel, so the base you build sits on open, drained soil.

Ground and Conditions in Colbert

The Spokane and the Selkirk foothills sit on cobbles, gravel and sand left by the Missoula floods. Water moves through the aquifer below at up to 60 feet a day.

That open ground drains fast, which is good news for a patio base and a warning for anything left on the surface. The aquifer has carried a federal sole source designation since 1978.

A thin base is the failure you notice first on flatwork. It shifts, and the pavers above it move with it.

Compacted fill and shallow basalt shelves are where the wet spots show up instead. Water sits there and softens the subgrade under a slab.

Winters freeze the ground to depth and the spring thaw follows. Spokane sets footing depth well below the western Washington figure for that reason, with a frost line of 24 inches in the Spokane Municipal Code design criteria.

Runoff cuts the loess on the hills south of the city and gullies the draws during thaw. Sediment then reaches the recharge ground when a site is left open.

Base and paving work runs through a long dry summer. The wet weather season for erosion control runs October 1 through June 30.

Materials for Colbert Projects

Bedding is what holds a patio flat. The material directly under pavers or flagstone decides whether the surface stays true or rocks underfoot.

Crusher dust, also called 3/8 minus or screenings, is the bedding material for paver and flagstone setting beds. It is a minus product, so it compacts rather than drains.

Stone Screenings also fills joints between units.

For a permeable patio, 3/8 clean is the washed, fines-free alternative. 3/8" Crushed Stone goes into paver joints and small drain runs where water needs to pass through instead of sitting.

Below the bedding, 5/8 minus is the Washington default surfacing course. 5/8 Minus is crushed rock with the fines left in, so it packs hard and sheds water rather than soaking it up.

It suits driveways, parking pads and shed or shop slabs.

Where the ground is soft or wet, 1 1/4 minus carries the load. 1 1/4 Minus is the structural course under a drive, parking area or slab, placed below a 5/8 minus top course.

Washed sand beds pavers and pipe, and mixes into concrete. Washed Sand has the silt taken out, which matters on a site working through the wet season.

Delivery to Colbert and the Surrounding Area

Order online and a dump truck tips the load on your site. Quantities are ordered by the ton or by the yard, whichever suits your project.

Each product page has a calculator. Size the load there before you check out.

Pick a delivery date at checkout. Washington Rock Supply delivers across Spokane County, including Spokane, Cheney, Liberty Lake, Airway Heights and Mead.

Questions About Aggregate in Colbert

What gravel is best for a driveway in Colbert?

5/8 minus is the Washington default surfacing course for a driveway. It is crushed rock with the fines left in, so it packs hard and sheds water.

Where the ground is soft or wet, 1 1/4 minus goes underneath as the structural course, carrying load below the 5/8 minus top.

How much material will my project need?

Each product page has a calculator. Order by the ton or by the yard, then pick your delivery date at checkout.

A dump truck tips the load on site in one pile.

Order Aggregate Delivery in Colbert

Size your load with the calculator on each product page, then order by the ton or the yard. Washington Rock Supply delivers bulk gravel, stone, sand and topsoil across Colbert and Spokane County.

Place your order online and a truck brings it to your site.