Underground utilities are the unseen backbone of municipal infrastructure. Increasingly congested right-of-way corridors, new construction methods, and the advent of trenchless technologies have created new challenges and opportunities in the maintenance and development of these vital lifelines. Gray & Osborne specializes in the following systems:

Water transmission and distribution

Trenchless construction

Pump Stations

Pressure reducing stations


Sanitary sewer collection

Infiltration and inflow rehabilitation

Lift stations

Force mains

Stormwater collection and transmission

Site development

Decant and transfer stations

Chelan Co PUD - Monitor Bridge Crossing
Anacortes - North Texas Waterline
Marysville - I-5 Jacking Pit
Northshore Utility District - Headquarters