Buy 5/8 Minus in Kenmore, WA

If you are planning gravel and aggregate delivery in Kenmore, WA for a driveway, a parking pad or a shed slab, the material that does the work is 5/8 minus. Washington Rock Supply sells it in bulk, along with the washed stone, sand and soil that go with it.

Kenmore sits on the Puget Sound lowland, where the ground is glacial till capped and the winter water table rides high. That shapes what you order.

Materials for Kenmore Projects

Start with the surfacing course. 5/8 minus, also called crushed surfacing top course or CSTC, is crushed rock with the fines left in.

The fines let it pack hard and shed water instead of soaking it up, which is why it is the default top course on a drive, a parking pad or a shop slab.

Under that goes the structural course. 1 1/4 minus, or crushed surfacing base course, has a larger top size and fewer fines than 5/8 minus.

It carries load and stays workable on soft, wet ground, so it sits below the 5/8 minus rather than on top of it.

Long rural drives and equipment parking take driveway gravel, sold by Washington quarries as a blend alongside the graded surfacing courses. It is the same family of material, put down as one product instead of two.

Where water has to move instead of sit, the choice changes. Drain rock, also called 7/8 clean or washed rock, has no fines at all, so it keeps its voids.

It goes into footing drains, French drains and infiltration trenches.

For walking surfaces, 1/4 minus packs down tight underfoot and suits garden paths and side yards. For bedding under pavers and flagstone, crusher dust, or 3/8 minus, compacts rather than drains.

Washed stone covers the drainage side: 3/4" Crushed Stone for trench backfill and pipe surround, and 3/8" Crushed Stone for paver joints and small drain runs.

Sand and soil round out a job. Washed Sand goes into concrete mixes and paver setting beds, and Top Soil handles lawn repair and grading out settlement.

Ground and Conditions in Kenmore

The driver here is perched water. Rain soaks the loose upper soil, reaches the dense till, and stops.

Across the Puget Sound lowland the water table then sits close to the surface all winter instead of draining away.

Anything built on till needs that water taken sideways to daylight. That is why footing drains and washed drain rock do so much of the work on this ground, and why a fines-bearing material is the wrong pick for a drainage run.

Winter rain perching where outwash sand meets clay below it is also what puts the bluffs of this region on the landslide maps. The same perched water undercuts cut slopes and fill on a smaller scale, so a slope above a drive or a pad is worth watching.

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.

Base, paving and paver work is scheduled for the dry months, and winter work needs the grade kept covered.

Winters here are mild and wet, so the ground seldom freezes deep. It is saturation rather than frost that softens a base, and a drive that was firm in August can rut in February.

Delivery to Kenmore and the Surrounding Area

Order online. You choose a quantity by the ton or by the yard, and each product page has a calculator if you want to size the load before you check out.

Pick a delivery date at checkout and a dump truck tips the material on site in one pile.

Have the drop area clear before the truck arrives. Bulk loads come off the back of the truck in a single pile, so the spot you choose is where the material stays.

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

Order Base and Driveway Material for Your Kenmore Project

Washington Rock Supply supplies 5/8 minus, 1 1/4 minus, drain rock, walkway gravel, sand and soil for driveways, parking pads, shed slabs, paths and drainage runs in Kenmore. Choose your material, set the quantity by the ton or yard, and place your order online for delivery.