Excavation Contractor in Bellevue, WA

Deep Excavation on Bellevue's Constrained Infill Sites

Bellevue's mixed-use centers hold the tightest work in the city. In Downtown, BelRed, and the Wilburton-East Main corridor, dense vertical projects sit right against existing structures and busy streets. That changes how the dig runs.

A boxed-in Bellevue lot usually calls for:

• Deeper cuts for below-grade parking and foundations
• Shoring and benching sized to the soil and depth to protect what is next door
• Spoil hauled off through streets with no room to spare
• Structural fill and a subgrade a foundation crew can build on

We proof-roll and run density testing when the spec calls for it, then hand you the numbers. On a tight lot there is no room to redo a pad.

Tying Utilities Into Bellevue's Built-Out Corridors

On developed corridors the hard part is the connection, not the trench. The mains are already in the ground and the street is live.

A clean tie-in on that kind of site means we:

• Connect sewer, storm, and water to line and grade
• Coordinate the cutover with the city and keep service running next door
• Set catch basins, manholes, and structures
• Carry the work through testing and inspection

Utility installs fall inside Bellevue's commercial clearing and grading permit, so the underground is part of the same approved scope as the earthwork. One sub owns both, so the tie-in never turns into a gap between two crews. As the underground utility contractor on the job, Mighty Arm carries the wet and dry work end to end.

Bellevue Permits Every Excavation Contractor Should Plan For

Permit thresholds shape the Bellevue schedule, and a GC should not learn that late. Confirm the current rules with the City of Bellevue for your parcel, but as a general guide:

• A clearing and grading permit is typically required once fill and excavation together pass 50 cubic yards
• Or once a project adds 2,000 square feet or more of new plus replaced hard surface
• Commercial plans usually need a stamp from a Washington State-licensed civil engineer
• A stormwater pollution prevention plan is required once a project hits those thresholds

The City can also hold a permit when erosion control is not performing on site, which is why it goes in early and stays maintained. Mighty Arm builds to those requirements so an inspection does not stall your job.

Where Mighty Arm Fits on Bellevue Developments

Bellevue's build mix runs from mixed-use blocks in the Spring District to commercial in Eastgate and Factoria and townhome infill in the residential neighborhoods. The excavation scope looks different on each.

• On a developer's raw parcel, we come in early as the land development contractor clearing the path from ground to buildable pad
• On a job already under a GC, we work as the excavation subcontractor tied to your schedule

We recently relocated a storm drainage system within eighteen inches of a live gas line on a constrained roundabout in nearby Kirkland, the tight-tolerance work Bellevue's corridors demand. Send Mighty Arm the plans and we will tell you where we fit. See more in our excavation project portfolio.

Bellevue Neighborhoods We Work In

Mighty Arm runs sitework across Bellevue, from the high-rise core to the residential edges. We take on excavation, utilities, and site prep in:

• Downtown Bellevue
• Spring District
• BelRed
• Wilburton
• Eastgate
• Factoria
• Crossroads
• Newport
• Somerset
• Bridle Trails
• Woodridge
• Lake Hills
• West Bellevue
• Cougar Mountain/Lakemont