Bulk Gravel and Stone Delivery in Columbia County, OR
Planning a driveway, a parking pad or a drainage run in Columbia County, OR? Oregon Rock Supply sells gravel, stone and aggregate delivery by the ton, and 3/4 minus is the base most of that work starts from.
This is the Willamette Valley and Portland Basin side of the state, where the ground runs to deep silt and clay. That ground sheds water slowly, so the material under your project matters as much as the material on top of it.
Ground Conditions Across Columbia County
Across the Willamette Valley and Portland Basin, the valley floor is deep slackwater silt laid down by the ice-age Missoula floods. Foothill ground runs to red clay and silty clay loam of the Jory series, with river gravel along the waterways.
That silt and clay sheds water slowly, and 35 to 45 inches of rain a year falls almost entirely between November and March. A thin base over ground like that shows up fast as ruts, pumping and soft spots.
Winter rain also runs off bare silt, scours banks, and triggers slides on steep foothill slopes. Riprap and clean open stone are what hold those edges and move that water.
Portland treats October 1 to April 30 as the wet weather season, when bare ground has to be stabilized within two days. From May 1 to September 30 the window is seven days, so base and paving work concentrates in the dry season.
Winters here are mild and wet with only short freezes. Frost heave is a minor concern next to winter saturation and soft subgrade, and the frost depth of 12 inches is the Oregon figure below about 2,500 feet, which covers the valley floor.
Materials Delivered in Columbia County
3/4 minus, also called 3/4-0 or 3/4 inch minus, is crushed rock graded 3/4 inch down to fines so it compacts and locks up.
Oregon specifies base material by top size with a minus notation, and the Oregon Standard Specifications for Construction set dense-graded base aggregate in Section 02630.10 at 2 1/2 inch - 0, 2 inch - 0, 1 1/2 inch - 0, 1 inch - 0 and 3/4 inch - 0.
Section 00641.10 states base aggregate is dense-graded unless otherwise specified, and Section 02630.11 covers open-graded aggregate, the clean, fines-free material.
Use 3/4 Minus under driveways, parking pads, shop floors and shed bases. Where the ground is soft, Quarry Run is raw rock straight from the pit or quarry face, used to build up grade before a graded base course goes on top.
Delivery Across Columbia County
You order online, choose a quantity by the ton or by the yard, and pick a delivery date at checkout. Each product page has a calculator to help size the load before you order.
A dump truck tips the load in one pile on site. That is the whole delivery: no spreading, no placing, and no splitting between piles.
Oregon Rock Supply delivers bulk material across the county, including St. Helens, Scappoose, Vernonia, Rainier, Clatskanie, Columbia City, Warren and Deer Island.
Choosing the Right Material
Clatsop County sits in the Oregon Coast and Coast Range ground region, where basalt headlands, marine sandstone and siltstone, dune sand and soft bluff material make for a different set of problems than valley silt and clay.
That difference changes the drainage choice. Loose dune sand and soft bluff ground drain freely but move easily, so clean open stone and riprap do more of the work there than a compacted minus base would.
Multnomah County and Washington County share the Willamette Valley and Portland Basin ground region with Columbia County. The ground is the same deep flood silt, Jory series clay loam and river gravel, so the base and drainage choices carry over directly.
Order Bulk Aggregate for Your Columbia County Project
Start with the quantity. Each product page has a calculator, and you can order by the ton or by the yard once you know what the job needs.
Oregon Rock Supply delivers 3/4 minus, drain rock, riprap, topsoil and more across Columbia County, and you can place your order online whenever you are ready.