Excavation Contractor in Aloha, OR

Aloha is the largest community we serve — 53,828 residents across 7.4 square miles of valley-floor land — and the character of the ground shapes every project here. Beaverton Excavation Co. handles residential excavation, drainage installation, foundation work, and utility trenching across Aloha’s established suburban parcels, where the lots are flat, the housing stock is mature, and the underground picture is complicated by decades of prior service runs.

Flat ground is not easier ground. On a sloped site, water moves downhill on its own and the excavation crew can take advantage of that natural fall when designing drainage. On Aloha’s valley floor, there is no natural fall — every drop of fall in a drainage system has to be deliberately built in, and the outlet point must be confirmed before a single foot of pipe goes in the ground. A drain that ends in a low spot with nowhere to discharge does not solve a wet-yard problem; it relocates it. That engineering step comes first.

What Excavation Work Looks Like on Aloha’s Valley-Floor Lots

Because Aloha is the flattest and most densely settled of the communities we serve, the most common jobs here involve working inside an established yard — around existing fences, utility stub-outs, and mature plantings — rather than breaking raw ground from scratch. The typical scope includes:

• French drain and curtain drain installation — the flat terrain means positive drainage requires graded trenches, perforated pipe, and gravel, all sloped to a legal outlet.
• Foundation excavation for additions and ADUs — established neighborhoods mean tight access and proximity to existing footings that must not be disturbed.
• Driveway excavation and gravel base — soft valley-floor soil compresses under vehicle loads without adequate base depth, so subgrade prep matters more than it looks.
• Utility trenching — water, sewer, and electrical runs through mature lots require 811 locates before the first machine pass.
• Yard regrading — low spots that pond after rain are common in settled lots where original grade has shifted over years; regrading redirects surface water to a drain or a property edge.
• Demolition and removal — old concrete pads, outbuildings, and shed slabs cleared before new construction or landscaping can begin.

Every one of these scopes requires a clear picture of what is already in the ground. We pull an 811 locate request on every job — no exceptions — and if the utility marks show a conflict with the planned trench line, we reroute before we dig. Learn more about our full range of services at excavation contractors in Beaverton, OR.

Tualatin Valley Silty Clay and the Eight-Month Wet Season

The Tualatin Valley sits on silty clay that was laid down by ancient lake and flood deposits. That clay is dense, slow-draining, and expands when it absorbs water. In dry summer months it behaves like firm ground. From October through May — Aloha’s wet season, which runs the better part of eight months — the water table rises and the clay stays saturated long after a rain event ends. Any trench cut during that window must be dewatered before pipe is set, and backfill that goes in wet will settle unevenly once it dries. Scheduling and soil management during wet-season work are not optional extras; they are the difference between a drain that performs year after year and one that fails by the second winter.

Working Around What Is Already There

Aloha’s 18,547 households are mostly established parcels where fences, irrigation lines, HVAC condensate runs, and mature trees all occupy the ground before we arrive. A significant portion of those households — 35.4 percent — have children under 18, which means the work is often a family improving the property they live in rather than a developer turning raw land. That context changes how we approach access and staging: protecting an existing lawn, keeping a gate operational during work, or sequencing around a backyard play structure. Our Beaverton excavation team walks the site before a machine moves so that existing features are mapped and protected through the job.

Cost and Scheduling on Flat Ground in Aloha

Drainage jobs on flat valley-floor lots carry a cost component that hillside work does not: the outlet. On a slope, a pipe can daylight to a swale or the street with minimal extra work. On Aloha’s level lots, the crew may need to trench further to reach a storm inlet, tie into an existing storm lateral, or install a dry well where no surface outlet exists. That extra run adds material and machine time. Quotes for flat-lot drainage reflect the full trench length to outlet — not just the length across the problem area — so the number may look different from a neighbor’s hillside project of similar scale.

Scheduling in Aloha follows the same Oct-May wet season that governs the rest of the Tualatin Valley. Wet-season excavation is possible but slower: dewatering, clay management, and trench shoring add hours to jobs that would move faster in summer. If your project can wait until June, the cost and timeline typically improve. If it cannot wait — a failed drain backing up into a crawlspace does not keep a schedule — the Beaverton excavation crew can work through the wet season with the right equipment and soil-management steps built into the plan from the start.

Excavation Services We Provide in Aloha

Aloha homeowners turn to excavation contractors in Beaverton, OR for drainage, foundation, driveway, and utility work on established valley-floor lots.

Specialist Excavation Work in Aloha

Aloha is the largest area we cover and the flattest, so several jobs here get their own page rather than a paragraph. The rest of what our Beaverton excavation crew handles is on the main page:

On ground this flat almost every job comes back to where the water goes. Our excavation services page explains how each one is scoped.

On ground this flat almost every job comes back to where the water goes. Our excavation services page explains how each one is scoped.

All Aloha services · How we scope a job · Start from the homepage · Describe the whole project

Frequently Asked Questions

Nearby Communities We Serve

Raleigh Hills · West Slope

Beaverton excavation contractor · Beaverton Excavation Co.