Crushed Stone, Sand and Gravel in Auburn, WA

Gravel and aggregate delivery in Auburn, WA runs on the wet season. Rain starts in October and keeps the ground soft into April, so grading and bed prep get squeezed into the dry months.

Washington Rock Supply delivers 5/8 minus and the rest of the aggregate list to Auburn and the surrounding King County area.

Perched water is the reason timing matters here. Rain soaks the loose upper soil, hits the dense till below, and stops.

Water sits close to the surface all winter instead of draining away.

Materials for Auburn Projects

Grading and bed prep come first on most sites. Fill dirt, sold as common borrow, raises grade and backfills over-excavations before a granular course goes down.

Washington yards screen and blend topsoil rather than selling native soil straight, and screened topsoil handles lawn repair, new turf and grading out settlement.

Garden soil is a blend of screened soil and compost. It suits raised beds, vegetable gardens and new planting beds where plain topsoil alone would not carry a planting.

Above the soil, the minus and clean split decides what a material does. Minus means the crusher fines stay in, so the rock compacts and holds.

Clean or washed means the fines are gone, so it drains. 5/8 minus, also called crushed surfacing top course or CSTC, is the Washington default surfacing course for driveways, parking pads and shed slabs.

1 1/4 minus, or crushed surfacing base course, sits below it as the structural course on soft ground.

For drainage, drain rock (7/8 clean) keeps its voids in footing drains and French drains. Washed sand and mason sand cover concrete mixes, paver setting beds and mortar.

Beauty bark covers planting beds and tree rings.

Ground and Conditions in Auburn

Across the Puget Sound lowland, the ground is glacial. A dense till cap sits over advance outwash sand, with silt and clay below that.

The lower till is hard enough that crews call it hardpan. Rain soaks the loose upper soil, reaches the till and stops, so the water table rides high all winter.

That is why drainage work matters more than depth here. Anything built on till needs the water taken sideways to daylight.

A footing drain with washed drain rock does that work, because the stone holds its voids instead of packing tight.

The same perched water undercuts cut slopes and fill on a smaller scale. The wet season runs October through April, and exposed soil in western Washington has to be stabilized within two days in that window.

Winter work needs the grade kept covered.

Winters are mild and wet, so the ground seldom freezes deep. Saturation softens a base more than frost does, and a drive that was firm in August can rut in February.

King County publishes an 18 inch frost depth for footing work, set by the building official.

Delivery to Auburn and the Surrounding Area

Order online and a dump truck tips the load on site. Quantities are ordered by the ton or by the yard, and each product page has a calculator to size the load.

Pick a delivery date at checkout.

Have the drop spot clear before the truck arrives. The load comes off in one pile, so the ground under it needs to be firm enough to hold the weight and open enough to work from afterward.

Auburn sits in King County, and delivery covers the surrounding area, including Kent, Renton, Federal Way, Bellevue and Seattle.

Questions About Ordering in Auburn

Can I order material by the ton for delivery in Auburn?

Yes. Quantities are ordered by the ton or by the yard, and you choose the amount when you order online.

Each product page has a calculator to help size the load before checkout. Pick a delivery date, and a dump truck tips the material on site.

What stone should I use for drainage in Auburn?

Drain rock, also called 7/8 clean, is the washed stone for footing drains, French drains and infiltration trenches. It carries no fines, so it keeps its voids where perched water sits on the till.

For trench backfill and under-slab drainage, 3/4 clean is the washed counterpart to a minus product.

Order Aggregate Delivery in Auburn

Auburn projects run from driveways and parking pads to raised beds, lawn repair and drainage trenches. Fill dirt, topsoil and garden soil handle the grading and bed prep, and the crushed stone and sand cover what goes above and below.

Order online when your grade is ready.