3/4 Minus, Sand and Gravel Delivery in Marion County, OR

Oregon Rock Supply delivers gravel, stone and aggregate delivery in Marion County, OR to contractors and homeowners alike. Some orders here are a single load for a driveway or a shed pad.

Others are several loads for a commercial pad or a new build.

Most of that work starts with 3/4 minus, the dense-graded base rock this part of Oregon builds on. You order by the ton or the yard and the truck tips it on site.

Materials Delivered in Marion County

Base rock carries the structural work. 3/4 minus, also called 3/4-0 or 3/4 inch minus, is crushed rock graded from 3/4 inch down to fines, so it compacts and locks up.

Oregon specifies base material by top size with a minus notation. The Oregon Standard Specifications for Construction set dense-graded base aggregate at 2 1/2 inch - 0 down through 3/4 inch - 0, and state that base aggregate is dense-graded unless otherwise specified.

That makes 3/4 Minus the standard base under driveways, parking pads, shop floors and shed bases. Quarry Run is raw rock straight from the pit face, used to build up soft ground and raise grade before a graded base goes on top.

Choosing the Right Material

Marion County spans two ground regions. The valley floor and the Portland Basin sit on deep slackwater silt laid down by the ice-age Missoula floods, with red clay and silty clay loam in the foothills.

The Cascade side is younger volcanic ground, andesite and basalt with pumice, cinders and ash over it. That difference decides base and drainage choices more than anything else here.

Yamhill County shares the valley ground, so the base and drainage choice there follows the same logic as on the Marion County floor. Clackamas and Linn counties both span the valley and the Cascades, the same two regions Marion County covers.

On tight silt, a compacting 3/4 minus base holds up, and a washed stone such as Drain Rock or 3/4" Crushed Stone moves water away. On free-draining volcanic ground the water leaves on its own.

Ground Conditions Across Marion County

In the valley and the Portland Basin, 35 to 45 inches of rain a year falls almost entirely between November and March. It lands on tight silt and clay that sheds water slowly, with a seasonal high water table in the lowlands.

Winter rain running off bare silt scours banks on the Willamette and its tributaries and triggers slides on the steep foothill slopes. Riprap armors those banks and culvert outlets against exactly that.

On the Cascade side, heavy winter precipitation and spring snowmelt run fast off steep volcanic slopes. Rain-on-snow runoff scours culverts, shoulders and stream banks, and debris flows come off steep volcanic slopes.

Portland treats October 1 to April 30 as the wet weather season and requires bare ground stabilized within two days, against seven days from May 1 to September 30. Base and paving work concentrates in the dry season.

In the Cascades the season is shorter: snow and frozen ground stop base and paving work from late autumn until the ground dries out in late spring. Plan the order around that window.

Valley winters are mild and wet with only short freezes, so frost heave matters less than winter saturation and soft subgrade. Any frost depth figure is set by the county building official.

Delivery Across Marion 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 if you need to size the load before ordering.

A dump truck then tips the load in one pile on site. Have the drop spot clear and reachable, with room for the truck to get in and out and nothing overhead in the way.

Delivery covers Salem, Woodburn, Silverton, Stayton, Aumsville, Hubbard, Mount Angel, Jefferson, Sublimity, Turner, Gervais, Donald, Aurora and Scotts Mills.

Order Gravel, Stone and Soil for Your Marion County Project

Oregon Rock Supply delivers 3/4 minus, washed stone, sand, soil and decorative rock across Marion County. That covers driveways, patio and shed bases, drainage runs, retaining wall backfill, raised beds and bank armoring.

Size your load on the product page calculator, then place the order online and a truck will tip it on site.