Bulk Gravel Delivery to Underwood, WA

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

Start with 5/8 minus, the crushed surfacing top course this side of the state builds drives and parking pads from.

Underwood sits in the Columbia Gorge, where thin stony ground on the slopes gives way to gravel on the valley floors. That mix decides which material your project needs.

Ground and Conditions in Underwood

Across the Cascade Range and the east-slope valleys, soil runs thin and stony over rock on the slopes. Below that, the valley floors carry glacial and river gravel.

A thin base fails at the edges first. Water gets under it, the surface rock migrates, and ruts open where tires track.

The fix is a structural course that carries load before the top course goes down.

On the west slope of the range, ground takes heavy annual rain and sheds it fast off steep ground. On the east side, snowmelt and cloudburst runoff arrive all at once.

Both leave road shoulders, ditches and culvert outfalls scoured.

Plan around a short working window. Snow closes the high ground, and the mountain valleys run roughly late spring to early autumn, later at elevation.

Winters are real here and get longer with elevation, with a genuine freeze-thaw cycle on the east slope. Frost depth is set by the local building department, so confirm the figure for your site.

Materials for Underwood Projects

Fines and screenings do the fine work on paths and walkways around Underwood. A minus product keeps its crusher fines, so it compacts and holds underfoot.

Start with Walkway Gravel, sold locally as 1/4 minus or quarter minus. It is the fine end of the minus range, which makes it a firm surface for garden paths and side yards.

For paver and flagstone bedding, use Stone Screenings, the local crusher dust. It compacts rather than drains, which is what a setting bed needs.

The state default surfacing course is 5/8 minus, also called crushed surfacing top course or CSTC. Crushed rock with the fines left in packs hard and sheds water instead of soaking it up, so it suits 5/8 Minus driveways, parking pads and shed slabs.

Below that, place 1 1/4 minus, or crushed surfacing base course. 1 1/4 Minus carries load and stays workable on soft wet ground.

Where water has to move instead of being held, washed stone takes over. Drain Rock, or 7/8 clean, keeps its voids for footing and French drains.

Delivery to Underwood and the Surrounding Area

Order online and choose a quantity by the ton or by the yard. Each product page has a calculator, so you can size the load before you check out.

Pick a delivery date at checkout and a dump truck tips the load on site. The truck tips it in one pile, so pick a clear spot that keeps the material out of the way.

Washington Rock Supply delivers across Skamania County, including Carson and Stevenson. Bulk loads are sized for full driveways, pads and trench runs, not just a few buckets.

Size Your Load and Place Your Order

Work out your quantity with the calculator on each product page, then order online by the ton or the yard and pick a delivery date. Washington Rock Supply delivers bulk gravel, stone, sand and soil to Underwood and the surrounding area.

Place your order when you are ready.