Selected by the City of Unalaska to provide design-build services for the construction of the Carl E Moses Boat Harbor to accommodate vessels up to 150-ft in length. Construction involved installation of (149) 24” diameter steel pile up to 170-ft in length socketed 20-ft into bedrock. Pile system utilized moment frames to support load requirements. 1,320-ft of mainwalk floats and 2,310-ft of finger floats were installed all equipped with power, lighting, domestic water, and dry standpipe fire suppression system. Included aluminum gangways, gangway landing floats, transfer bridge, and drive down floats. Work was performed from floating platform involving drilling footing holes and setting foundation seal casings. Drilling was performed in up to 130-ft of water using a NUMA reverse circulation drill system within an inch of planned location. Upland work consisted of new harbor masters building.
2012 Outstanding Civil Engineering Project of the Year by American Society of Civil Engineers (ASCE).
“The new facilities also will save the fleet time and fuel—they won’t need to make the trip to Seattle for repairs or supplies. That’s about a seven—to—14-day trip for them and it takes anywhere from 15,000 to 30,000 gallons of fuel each way. We’ll have all the services they need here.”
– Tyler Zimmerman, Unalaska City Engineer, Alaska Business Monthly, May 2011