Mammoet completes roll-off operation for 3152-ton HRSG module

The 3152-ton HRSG module making its way down the Hundson River

Date 14 August 2018

Mammoet has successfully completed a complex roll-off operation for one of the largest HRSG modules to ever be transported by barge. PSEG contracted Mammoet to move the fully assembled 3152-ton module from Coeymans, New York to the Bridgeport Harbor Station 5.

The new state-of-the-art-combined-cycle gas plant is currently under construction on PSEG Power Connecticut’s existing site in Bridgeport, Connecticut. Following the project’s expected completion in 2019, the 485 MW power station will provide over 500,000 homes and businesses in south-western Connecticut with clean, sustainable energy.

This is not the first time Mammoet has transported a HRSG module of this scale by barge and offloaded it onsite. In a similar project, the HRSG module was built offsite to reduce the overall construction schedule. It was the transported by barge down the Hudson River. Measuring 145’ long, 120’ high, and 39’ wide, it was moved onto the barge on 141 axle lines of SPMT’s which remained underneath the unit during the transport.

Upon arrival at the Bridgeport site, the module could not directly be offloaded from the barge, due to insufficient water levels. Mammoet proposed placing a grounding barge between the offload site and the barge carrying module so it could sit in deep water levels. The module’s barge was securely fastened to the grounding barge, which provided the stability to transport the module on the SPMTs over the grounding barge and onto the offload site 

Source Mammoet 

Photographs: Glen Raymo, AVP