Vortex was awarded this prime contract with the USCG to rehabilitate the Coast Guard’s cutter pier in Alameda, California. The work included marine demolition, significant reinforced concrete pile restoration and cathodic protection, spalling repair and crack injection of the structural concrete deck, caps and beams, installation of a hybrid driven steel pile/ timber panel/ pneumatic fender system, installation of new mooring bollards, installation of a mono-pile mooring dolphin with concrete cap and catwalk, and fabrication of new steel stanchions and gangways.

This challenging design-build project, the first repair method of its kind, entailed installation of a concrete secant pile cut-off wall immediately upstream of the existing dam and spillway structure, to prevent the flow of water under the dam, eliminating the potential for structural failure.

Vortex supplied and installed 137 prefabricated fender H-piles using a land based crawler crane with a vibratory hammer set in fixed leads to meet critical installation tolerances and a back-batter. We coordinated this project closely with the Port to allow for minimal disruption to the vessel berthing schedule and completed it ahead of schedule.