Bulk Gravel Delivery to Davenport, WA

Washington Rock Supply handles gravel and aggregate delivery in Davenport, WA, and the working season sets the schedule. Eastern Washington's wet weather season runs October 1 through June 30, and once snow falls or the ground freezes, placing and compacting base material stops being practical.

Plan your 5/8 minus order around that window. Across the Columbia Basin, Yakima Valley and the channeled scablands, the ground is dry and loose for most of the year, then sheds water fast when a storm lands.

Ground and Conditions in Davenport

This part of the state sits on windblown loess over Columbia River basalt. Where the Ice Age floods ran, the loess was stripped off and the basalt left bare.

The floods also dumped sand and gravel bars in the coulees and along the rivers.

A thin base course is what fails first on that ground. Silt sheds water instead of absorbing it, so a shallow lift of rock moves under a truck tire and pumps into the soil below.

The fix is a structural course that carries load, with the surfacing layer on top of it.

Drainage matters just as much. Parts of the basin take only seven to nine inches of rain a year, then get a thunderstorm or a rapid thaw that arrives all at once.

Water needs somewhere to go, and a fines-free stone gives it a path.

Winter is the other constraint. The ground freezes properly here, unlike west of the Cascades, and frost heave in an unbound base is something to design for.

Any footing depth comes from the county or city building department, and it runs deeper with elevation.

Materials for Davenport Projects

Bedding under pavers and flatwork is where the material choice shows up in the finished surface. A setting bed has to compact tight and stay put, so a minus product does that work rather than a washed one.

Stone Screenings, also called crusher dust or 3/8 minus, is the bedding material for pavers and flagstone. It is a minus product, so it compacts rather than drains, which is what a setting bed needs.

Walkway Gravel, or 1/4 minus, sits at the fine end of the minus range. It packs down tight underfoot for garden paths, side yards and firm walking surfaces.

Where a washed stone is wanted instead, 3/8" Crushed Stone goes into paver joints and permeable paver setting beds. It is clean, with the fines taken out, so it drains instead of locking up.

Washed Sand beds pavers and mixes concrete. It is washed to take the silt out, which matters on a site working through the wet season.

For the drive or pad under all of it, 5/8 Minus is the Washington default surfacing course. It is crushed rock with the fines left in, so it packs hard and sheds water instead of soaking it up.

It also goes under shed and shop slabs.

Below that, 1 1/4 Minus is the structural course. Larger top size and fewer fines than 5/8 minus, so it carries load and stays workable on soft wet ground.

Washington quarries sell it as crushed surfacing base course, or CSBC.

Drain Rock, or 7/8 clean, is washed with no fines. It keeps its voids where a perched water table sits, so it works in footing drains and curtain drains.

Delivery to Davenport and the Surrounding Area

You order online, choose a quantity by the ton or by the yard, and pick a delivery date at checkout. A dump truck then tips the load on site in one pile.

Each product page has a calculator to help you size the load before you order. Davenport sits in Lincoln County, and delivery covers the surrounding area, including Wilbur, Odessa, Sprague, Reardan and Harrington.

Order Bulk Aggregate for Your Davenport Project

Work out your quantity with the calculator on each product page, then place your order online and choose a delivery date. Washington Rock Supply delivers bulk gravel, stone, sand and topsoil across Davenport and Lincoln County.

Order your 5/8 minus, bedding material or drainage rock today.