Buy Fill Dirt in Greenbank, WA

Order gravel and aggregate delivery in Greenbank, WA online, by the ton or by the yard. Washington Rock Supply brings bulk material to your site, from 5/8 minus for a driveway top course to topsoil for a new lawn.

Glacial ground runs under this part of the Puget Sound lowland. Dense till sits below the loose upper soil, so water perches near the surface all winter instead of draining away.

Materials for Greenbank Projects

Grading and bed prep start with soil and fill, then a granular course goes over the top. If you are raising grade, backfilling an over-excavation or building up a low spot, Fill Dirt is the material for that work.

For lawns, garden beds and grading out settlement, Top Soil is screened and blended rather than sold as native soil. For raised beds and vegetable gardens, Garden Soil is a blend of screened soil and compost.

Once the grade is set, a compacted surfacing course goes down. 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 for driveways, parking pads and shed slabs.

Order it as 5/8 Minus.

Below that top course, 1 1/4 minus, also called crushed surfacing base course or CSBC, carries load on soft wet ground. It has a larger top size and fewer fines than 5/8 minus.

It is listed as 1 1/4 Minus.

Where water has to move instead of sitting, washed stone does the work. Drain rock, also called 7/8 clean, has no fines, so it keeps its voids in a footing drain or infiltration trench.

See Drain Rock.

Ground and Conditions in Greenbank

Rain soaks the loose upper soil, reaches the dense till and stops. The water table then sits close to the surface through the winter, and it has nowhere to go unless it is taken sideways to daylight.

That is why footing drains and washed drain rock carry so much of the load here. A clean, fines-free stone keeps its voids open where a perched water table sits on till.

Drain rock is the material for that job.

Erosion follows the same water. Where outwash sand meets clay below it, winter rain perching at that contact is what puts slopes on the landslide maps.

The same perched water undercuts cut slopes and fill on a smaller scale, so plan the drainage before the grade is finished.

The wet season runs October through April. Under the state stormwater manual for western Washington, exposed soil must be stabilized within two days in that window against seven days in summer.

Schedule base and paver work for the dry months and keep the grade covered in winter.

Winters here are mild and wet. The ground seldom freezes deep, so it is saturation rather than frost that softens a base.

A drive that was firm in August can rut in February.

Ordering and Delivery in Island County

Order online and pick a quantity by the ton or by the yard. Each product page has a calculator.

Bulk delivery arrives on a dump truck that tips the load in one pile on site, so have the drop area clear and reachable before the truck arrives.

Washington Rock Supply delivers across Greenbank and the rest of Island County, including Oak Harbor, Coupeville, Freeland, Clinton and Langley. Pick your delivery date at checkout.

Order Fill Dirt and Aggregate for Your Greenbank Project

From fill dirt and topsoil for grading and bed prep to 5/8 minus, drain rock and sand for the work that follows, Washington Rock Supply delivers bulk material across Greenbank. Order online by the ton or yard and pick your delivery date at checkout.