3/4 Clean, Stone and Soil Delivery in Seattle, WA

Looking for gravel and aggregate delivery in Seattle, WA? Washington Rock Supply sells bulk material by the ton, from 5/8 minus for a driveway surface to washed stone for footing drains.

Start with what the water does on your site, then pick the size that handles it.

Materials for Seattle Projects

Wet ground is the common thread on drainage work around Seattle. Washed stone keeps its voids, so water moves through it instead of sitting against your foundation.

Washed stone for drains and drywells

Drain Rock, also called 7/8 clean, is washed with no fines left in it. That open structure is what makes it work in footing drains, French drains and infiltration trenches.

3/4" Crushed Stone handles trench backfill, pipe surround and under-slab drainage. It is the washed counterpart to a minus product, so it drains rather than compacts.

For drywells and heavy drainage, #4 Crushed Stone is the coarse end of the clean range.

4 for gravel backfill for drywells.

Downspout runs and pipe bedding call for Natural Pea Gravel. It is rounded and washed, so it will not compact.

Minus products that pack

5/8 Minus, the local name for crushed surfacing top course, is the Washington default surfacing course. The fines stay in, so it packs hard and sheds water instead of soaking it up.

Below it goes 1 1/4 Minus, or crushed surfacing base course. Larger top size and fewer fines, so it carries load and stays workable on soft ground.

Beds, paths and soil

Delivery to Seattle and the Surrounding Area

Washington Rock Supply delivers bulk material across Seattle and the rest of King County, including Bellevue, Kent, Renton, Federal Way and Kirkland.

You order online and 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.

You pick your delivery date at checkout, and a dump truck tips the load on site in one pile. Have the spot clear before the truck arrives.

Ground and Conditions in Seattle

Seattle sits on the Puget Sound lowland, where glacial ground left a dense till cap over sand, silt and clay. The lower part of that till is hard enough that crews call it hardpan.

Rain soaks the loose upper soil, reaches the till and stops. The water table sits close to the surface all winter, so anything built on till needs the water taken sideways to daylight.

That is why footing drains and washed drain rock do so much of the work here. It is also why a drive that was firm in August can rut in February: saturation, not frost, softens a base in this part of the state.

The wet season runs October through April. Exposed soil has to be stabilized within two days in that window, against seven days in summer, so base, paving and paver work is best scheduled for the dry months.

Questions About Gravel in Seattle

Do you deliver 5/8 minus to Seattle, WA?

Yes. Washington Rock Supply delivers 5/8 minus across Seattle and King County.

You order it online by the ton or the yard, then choose a delivery date at checkout. Local quarries also know this material as crushed surfacing top course, so the name may come up that way on a spec sheet.

What gravel is best for a driveway in Seattle?

For most drives, 5/8 minus is the surfacing course and 1 1/4 minus goes underneath it. The minus blend leaves the crusher fines in, so the rock compacts and holds instead of shifting under tires.

On soft, wet ground the larger base course carries the load better.

Order Bulk Gravel for Your Seattle Project

Washington Rock Supply delivers 5/8 minus, washed stone, sand and soil across Seattle and King County. Pick your material, set the quantity and choose a delivery date at checkout.

Order your load online and get the job moving.