Mass Excavation & Earthwork Contractor in Portland, OR

Picking an earthwork contractor in Portland comes down to whether the crew can hold quantities and hold schedule. On a mass excavation scope, small errors multiply. A quantity takeoff that is off by ten percent, or a haul route that fails in the rain, turns into real money across a multi-acre site.

Our company carries Oregon CCB# 243015, plus DBE/MBE/ESB# 13892 and WA Business License ANGELUL771QZ. We hold Public Works and ODOT certifications, and we are verified through both SAM and Avetta. We are also a PGE-certified contractor, which matters on any parcel with Portland General Electric infrastructure crossing it.

Before you hire, you can look up any contractor through the Oregon Construction Contractors Board (CCB), and we ask every client to do it.

Any site of this size triggers stormwater rules. Oregon DEQ requires a 1200-C construction stormwater permit for any site disturbing one acre or more, and inside city limits Portland City Code Chapter 24.70 requires a grading permit with an approved erosion and sediment control plan. On a mass excavation job, that plan is a working document, because the site changes shape every week.

In our experience, the thing that decides a Portland earthwork job is the soils report. Willamette Valley silt loam, expansive clay, and a high winter water table all change what can be used as structural fill and what has to be over-excavated and replaced. We review the geotech report before we bid, because the difference between balancing a site and importing four hundred truckloads of rock is usually written in it.

Sites also behave differently across the metro. On flat industrial parcels along Highway 30 and out toward Rivergate, the work is volume and haul efficiency. On hillside parcels near the West Hills or in Happy Valley, benching, slope stability, and runoff control set the sequence before dirt volume does, and the same holds on the west side through Beaverton and Hillsboro.

Mass excavation is the volume scope. Once the parcel is at design grade, our site preparation and grading crew takes it to finish tolerance, and our construction excavation crew handles the foundations, footings, and utility trenching for the buildings that go on it.

Comprehensive site development services

Our crew handles the earthwork scope from takeoff to a site at design grade:

• Mass excavation and bulk earthmoving on multi-acre parcels
• Cut and fill quantity takeoff and whole-site balance analysis
• Over-excavation and removal of unsuitable soils
• Structural fill placement and compaction in lifts to geotech spec
• Bulk import and export of rock, structural fill, and spoils
• Subgrade cuts across multi-building commercial sites
• Benching, slope work, and retaining preparation
• Detention pond and stormwater facility excavation
• Phased erosion and sediment control for large open sites
• Utility locating and potholing ahead of bulk cuts, coordinated with our utility contractors
• Haul road construction and rocked entrances built for high truck volume
• Rough grade delivery ahead of site preparation and grading finish work

We plan each job around the geotech report, the cut and fill balance, haul distance and disposal cost, groundwater, slope, and the schedule your other trades are working to.

Earthmoving methods for Portland’s soil and weather

Large open sites in Portland are exposed for months, and the weather does not wait. Clay soils that compact well in September become unworkable in December, and an eight-acre site with no cover sheds a lot of water into the storm system. Our team excavates in phases, keeps only the working area open, and stabilizes completed portions as it goes.

That phasing protects the schedule and the permit at the same time. By balancing on site where the plan allows, rocking haul roads before the rain arrives, and moving erosion control forward with the work, we keep large earthwork jobs running deeper into the wet season than an all-at-once approach can, so the construction excavation that follows starts on stable ground.

Environmental responsibility

Mass excavation moves more soil than any other scope on a site, so it carries the most responsibility for runoff and for what leaves the property. We plan erosion and sediment control before the ground opens, carry it forward from whatever was set during land clearing, follow Oregon DEQ construction stormwater standards, and work to the City of Portland Erosion and Sediment Control Manual inside city limits.

Where the plan allows, we balance cut and fill on site. On a large parcel, that removes hundreds of truck trips from neighborhood streets, cuts the carbon and the cost of the job, and keeps clean fill out of the landfill.