Overview
The Tappan Zee Bridge, which opened in 1955, was recently replaced by the four-billion-dollar Governor Mario M. Cuomo Bridge constructed by the Tappan Zee Constructors (TZC). TZC, a joint venture between Fluor, American Bridge, Traylor Bros, and Granite, was also tasked with the demolition and removal of the old Tappan Zee Bridge. Ballard was contracted by TZC to support the demolition of the bridge, existing ice breaker, and circular caissons foundations.

Scope of Work
Ballard’s scope for the demolition effort specifically included cutting the quantities of straight sheet piles, H-piles, and steel fender pipe piles in the limited visibility, high current, and extremely cold and icy waters of the Hudson River.

Innovative Solutions
To facilitate the underwater cutting operations for pile removal, Ballard divers conducted jetting operations to expose the piles at the demo/cutline.

Results
Ballard developed an Underwater Cutting Work Plan, detailing the safe and efficient work procedures needed to complete the required underwater cutting. This plan also documents a hazard analysis, work sequence, equipment inspection and maintenance, quantity tracking, and compliance with applicable environmental commitments.