Aggregate & Gravel Supply in Multnomah County, Oregon

Why Choose Our Aggregates in Multnomah County

Our aggregates are sourced and tested to meet local project requirements. We focus on material consistency, delivered on time and placed where you need it. Whether you are in an urban Portland neighborhood or a rural Corbett property, our selection supports durable, sustainable builds.

Key benefits of our aggregates and materials

• Reliable material quality and gradation for compaction and drainage
• Free delivery across Multnomah County, including Portland and Gresham
• Environmentally conscious options like crushed concrete and recycled aggregates
• Support for permeable pavements and stormwater management
• Technical guidance on product selection based on soil and climate

Service features

• Free aggregate delivery within Multnomah County on most loads
• Drop-off and offload options for tight urban sites
• Flexible scheduling to work around rainy seasons and contractor timelines
• Expert advice on materials for drainage, driveways, and site prep

Project Types We Support Across Multnomah County

Our aggregates and materials serve a wide variety of projects. Local contractors, landscapers, and homeowners rely on our delivery for consistent results.

Common projects

• Residential and agricultural driveways in Portland, Gresham, and Corbett
• French drain and yard drainage systems to manage heavy winter rains
• Garden bed and lawn restorations using screened topsoil
• Pathways and ADA routes with decomposed granite and walkway gravel
• Commercial site subbases using road base and crusher run
• Play areas and parks with playground sand and pea gravel surfacing

Local Conditions & Why Material Choice Matters

Multnomah County spans river valleys, basalt hills, and urban neighborhoods. Material selection should reflect local geology and typical weather patterns to ensure longevity and performance.

Geology and soil

Much of the county sits on Willamette Valley alluvium and Columbia River basalt outcrops. Common soils include silty loam and clay-rich subsoils in low-lying floodplain areas. With variable texture from sandy river deposits to dense clay, selecting the right aggregates helps prevent settling and erosion.

Climate and drainage considerations

Multnomah County receives significant winter rainfall, with annual averages around 36 to 45 inches depending on elevation. That high precipitation makes drainage design essential. Use drain rock or #57 stone around footings and in French drains to manage water. For driveways, a compacted base of road base or crusher run topped with driveway gravel prevents rutting and washouts during wet months.

Local landmarks and microclimates

From the Willamette River corridor and downtown Portland neighborhoods to the eastern foothills near the Columbia River Gorge, microclimates vary. Wind exposure and sun exposure near the Gorge can dry surfaces faster, while dense urban canyons stay cooler and wetter. We recommend slightly coarser aggregates in forested, shaded areas to improve drying and reduce moss buildup.

Installation Tips and Best Practices

Preparing a driveway base in Multnomah County

Proper subgrade prep is critical. Excavate to the design depth, place road base or crusher run, compact in lifts, and then finish with a wearing layer of 3/4 inch crushed stone or driveway gravel. This layered approach handles seasonal wetting and freeze-thaw stresses in higher elevations near the Gorge.

Drainage solutions

For yards and foundations, use drain rock wrapped in geotextile to prevent fines from clogging the system. Place a 4 to 6 inch bed of #57 stone under slabs where drainage is needed. If you are dealing with low spots or seasonal ponding, a combination of crushed concrete and top dressing will improve grade at low cost.

Gardens, beds, and lawns

Amend native soil with screened topsoil for planting beds and lawn patches. Where fill is required, choose clean fill dirt for structural fills and bring in topsoil only for the final planting depth. Use washe d sand sparingly to improve drainage in heavy clay spots.

Choosing Sustainable Aggregates in the Portland Metro

Recycled materials such as crushed concrete reduce the need for virgin stone and support local circular material use. Permeable surfaces and proper base design lower stormwater runoff and help comply with local stormwater requirements in urban projects.

Benefits of recycled and local aggregates

• Lower embodied carbon by using crushed concrete and local rock
• Cost-effective base material for large commercial jobs
• Meets many stormwater infiltration best practices when combined with proper design

How Delivery Works in Multnomah County

We coordinate deliveries to account for narrow city streets in Portland and rural access in Corbett. Our drivers can offload using end-dump trucks or place materials with careful drop plans for tight urban sites.

Delivery features

• Free delivery within Multnomah County on many loads
• Scheduled morning or afternoon deliveries to avoid traffic
• Protected delivery windows during high rain seasons
• Advice on material quantity and depth to minimize waste

Material Selection by Neighborhood and Terrain

Different parts of the county demand different solutions. Urban infill areas often require compactable bases and clean delivery methods. Rural properties need heavier bulk deliveries and erosion control rock choices.

Portland (urban)

For small front yards and terraces, consider decomposed granite and walkway gravel for low maintenance. In high-traffic city alleys, crusher run is often the most practical base option.

Gresham and Troutdale (suburban/foothills)

These communities benefit from robust road base and 3/4 inch crushed stone on driveways that see frequent wet weather. Use drain rock to protect foundations and manage hillside runoff.

Corbett and eastern foothills

Deeper drainage and erosion control are common here. Select larger river rock for swales and retention areas and compacted road base for steep access roads.