Bulk Rock and Soil for Hillsboro, OR Projects
Hillsboro is a large city in Washington County with an estimated 2024 population of 110337. Projects that raise a low yard, backfill an excavation, or build up a pad need the right material placed in the right order. Oregon Rock Supply lists bulk aggregate, sand and soil for property work where grade, drainage and compaction matter.
Bulk materials for Hillsboro grading and site work
Start with the job beneath the finished surface. 3/4 Minus, also called 3/4 inch minus or dense grade, locks together for driveway bases, pads and compacted fill. Drain Rock leaves open spaces for water movement, while Willamette River Rock provides a rounded finish for exposed ground cover and bed areas.
For a new driveway or parking area, place 3/4 Minus in compacted lifts instead of spreading the whole depth at once. A patio or path finish calls for a finer layer of 1/4 Minus, also known as quarter minus or crushed fines, after the base is compacted.
Washington County ground, frost and drainage planning
Low areas need grading before soil is placed. Fill material builds grade and supports a pad, while Topsoil belongs at the surface where planting is planned. Putting organic soil below a driveway, shed pad or other load-bearing area leaves a weak layer that holds moisture.
Clay conditions in Oregon's Willamette Valley stay saturated from November through April. A driveway built without a draining base can develop ruts during winter. Use a compacted 3/4 Minus section for support, then use Drain Rock, available as 3/4 clean or 1 1/2 clean, where the plan calls for water to move away from the work area.
Oregon's statewide frost-depth guide is 12 inches. Confirm required depth, drainage details and any permit requirements with the local building department before building footings, utility trenches or a permanent structure.
Delivery planning for Hillsboro and nearby towns
Delivery coverage includes Hillsboro in Washington County, along with Cornelius, about 4 miles west of Hillsboro, and Beaverton, about 7 miles east of Hillsboro. North Plains is about 12 miles north, Sherwood is about 12 miles southeast, and Banks is about 13 miles northwest. Newberg in Yamhill County is about 13 miles south of Hillsboro.
Use ZIP codes 97123 and 97124 when checking the delivery location. Before selecting a delivery date, check gate width, overhead clearance, parked vehicles, soft ground and room for the truck to turn and unload. Mark the drop area, keep people clear during unloading, and choose a firm spot that keeps material out of traffic paths and drainage routes.
Measure before you order
Use the calculator to enter the length, width and depth of the area, then review the material quantity before ordering online. Select a delivery date that fits site access, preparation work and the space needed for unloading.