Replaced existing two-lane steel bridge with four-lane, fixed-span steel bridge for the WA Dept. of Transportation.
Installed 48-in and 72-in dia. open-ended steel foundation pile for bridge abutments and piers. Pile driven to depths to 250-ft. Excavated within pile in the wet and placed a tremie concrete seal. Performed sand capping for shoreline remediation. Developed innovative turbidity curtain to mitigate pile driving.