Excavation
Excavation & Site Prep in Lakeside, Oregon: 2026 Guide
Cojo
May 29, 2026
6 min read
Coastal site work is a different animal, and Lakeside is a textbook example. Sitting between Tenmile Lakes and the Oregon Dunes, the ground here is sandy, the water table is high, and sensitive wetlands and waterways are never far away. Lake homes, vacation properties, and small businesses all need grading, drainage, and base prep before anything gets built or paved, and on the coast that work has to account for water that comes from above and below.
Cojo Excavation & Asphalt handles site prep across Lakeside and the surrounding Coos County coast from its Willamette Valley base. Excavation is the foundation of nearly everything else, and coastal conditions make it especially worth doing right.
Excavation is harder to chart than paving because every site is different. Soil type, the water table, haul-off distance, access, and the volume of material moved all swing the cost, and coastal sand often means more base import than inland jobs. The ranges below are industry baselines. Actual costs in the current market frequently run higher, and a coastal location can add to that.
Industry baseline ranges shown below. Actual costs vary widely and are often higher based on soil, water table, volume, access, haul-off, and scope.
| Service | Industry Baseline Range |
|---|---|
| Site grading (per sq ft) | $0.50–$2.00 |
| Excavation / digging (per cubic yard) | $50–$200 |
| Utility trenching (per linear foot) | $10–$30 |
| Land clearing (per acre) | $1,500–$6,000 |
| Drainage / French drain (per LF) | $25–$60 |
The defining excavation challenge in Lakeside is water and sand. Coastal soils drain fast but provide little structural stability on their own, and the high water table near Tenmile Lakes means you often hit groundwater not far down. Building anything stable on this ground usually requires excavating unstable sand and importing engineered base, sometimes deeper than an inland job would need.
Drainage is the other half of the picture. On a coastal lot you have to manage surface water shedding off structures and groundwater pushing up from below. Good site prep grades the land to move water away, installs French drains or culverts where needed, and accounts for a water table that rises through the wet season. On many Lakeside jobs the water management plan is the real work.
Excavation on the coast carries a heavier regulatory layer than inland, because of the sensitive habitat:
We work through the applicable county and environmental requirements as part of the job, which matters a great deal on the coast.
Oregon law requires marking underground utilities through 811 before any excavation. On coastal properties this matters because buried power, water, septic, and other lines are often undocumented, and the high water table can complicate exposed utilities. We file the locate request and wait for the marks before equipment touches the ground. It is not optional and it is genuinely important.
Site prep is the first step in most larger projects. A driveway is only as good as the sub-base under it, so excavation and drainage set up the asphalt paving in Lakeside that follows. Proper drainage often prevents the very driveway repair problems that bring coastal property owners to us. Doing the dirt work right the first time is almost always cheaper than fixing failures later.
Coastal excavation rewards local knowledge above almost anything. A contractor who understands sandy soils, a high water table, coastal drainage, and the stricter environmental permit picture will save you from expensive surprises. We do site prep across the Coos County coast, and we bring the equipment and water-management experience that Lakeside sites demand.
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