Mass Excavation, Backfill & Final Grading
The race begins when school is out for summer break!  This project includes excavation of approximately 9,000 CY, open cut on 3 sides and shored with a temporary ecology block wall on the remaining side due to the proximity to the street.  Phase II will require backfill and compaction and final grading and aggregates for asphalt and concrete paving.

Foundation & Utility Ex/Backfill
Located adjacent to the Renton Municipal Airport, the project consists of extensive foundation and utility upgrades to an existing hangar building. Soil freezing will be utilized as the means of shoring as the excavation will extend well below the water table. The "freeze" takes approximately 8 weeks with the intent of creating a "bathtub" effect, excluding the water from the limits of excavation so construction is not adversely affected.