Gravel and Aggregate Delivery in Riverside, WA

Gravel and aggregate delivery in Riverside, WA runs on a short season. Snowmelt arrives fast in spring and the ground stays soft until it drains.

Washington Rock Supply delivers 5/8 minus and the rest of the order by dump truck, tipped on site.

Okanogan County sits in the coldest corner of the state, so the work window between breakup and freeze is tight. Ordering early in that window keeps a project moving.

Materials for Riverside Projects

Grading and bed prep start with soil and fill. Fill Dirt raises grade, backfills over-excavations and builds up low spots before a granular course goes down.

Top Soil is screened and blended for lawn repair, new turf and grading out settlement. Garden Soil is a screened soil and compost blend for raised beds and vegetable gardens.

Once grade is set, the surfacing course takes over. 5/8 minus, also called crushed surfacing top course or CSTC, is crushed rock with the fines left in, so it packs hard and sheds water.

It suits driveways, parking pads and shed slabs.

Below it, 1 1/4 Minus, or crushed surfacing base course, carries load on soft wet ground. Walkway Gravel, also called 1/4 minus, packs tight underfoot on paths and side yards.

Ground and Conditions in Riverside

Most of the year's water here arrives as snow and leaves over a few weeks in spring. That runoff saturates valley soils while the ground below them is still frozen.

Gravel valley floors drain quickly. Till and lake silt do not.

Across the Okanogan Highlands and the northeast corner, thin stony soil sits over granite, gneiss and metamorphic rock on the ridges. Spring runoff then scours ditches, culverts and gravel roads during breakup, and bare burned slopes shed soil and rock after wildfire seasons.

That is where a washed stone earns its place. Drain Rock, also called 7/8 clean, keeps its voids where a perched water table sits.

3/4" Crushed Stone backfills trenches and surrounds pipe, because it drains instead of compacting.

Frost heave and soft spring ground govern any unbound base in Okanogan County, where frost depth runs 24 inches. The county or city building department sets the figure, and it can be deeper at elevation.

RipRap protects shoreline, streambank, culvert outfalls and cut slopes. Large River Rock armours swales, ditch lines and bank toes.

Erosion control work runs October 1 through June 30 in eastern Washington.

Delivery to Riverside and the Surrounding Area

Bulk material arrives by dump truck and is tipped in one pile at the delivery address. Have the drop area clear and reachable before the truck arrives, with room for the bed to clear overhead lines and branches.

Order online in Riverside, WA. Choose a quantity by the ton or by the yard, and each product page has a calculator if you want to size the load yourself.

Pick a delivery date at checkout.

Washington Rock Supply delivers across Okanogan County, including Omak, Okanogan, Brewster, Oroville and Twisp.

Order Fill, Soil and Stone for Riverside Sites

Washington Rock Supply serves grading and bed prep, driveways, parking pads, slab prep, drainage and erosion work in Riverside. Choose your material, order online, and pick a delivery date that fits your season.

Place your order when your site is ready.