Statewide Underwater Bridge Inspections in Colorado


Our firm as performed four consecutive cycles of underwater bridge inspections for 90+ bridges statewide using surface-supplied air and commercial SCUBA diving systems. The inspections included two bridges crossing the Blue Mesa Reservoir at depths in excess of 100 ft. (adjusted for altitude at an elevation of 7,500 ft.). The inspections at Blue Mesa were conducted using a helium and oxygen breathing gas mixture and a recompression chamber, with the assistance of acoustic imaging. Hot water suits were used due to extended decompression times and cold water. The remaining bridges included timber, steel, and concrete construction crossing rivers and streams with fast currents. Each inspection required a comprehensive engineering report.