Three tugs guide massive module down Hudson River


The following is the text of a news release from JMS Naval Architects:

(MYSTIC, Conn.) — Under contract to Durr-Megrant JV, JMS Naval Architects conducted an engineering review of the sea-fastening structural calculations used in the transport of a heat recovery steam generator (HRSG) module on board a 400-foot heavy-lift barge from Coeymans, N.Y., to Sewaren, N.J., down the Hudson River.

The 125-foot-tall, 3,800-long-ton HRSG module will be part of the new Sewaren 7 power plant under construction in Woodbridge, N.J. Mammoet Global Engineering performed the loadout operation of the machinery onto and off of the barge using its hydraulically-powered heavy-lift transporters. The Port of Coeymans/Carver Marine Towing performed the tow using the tug Mister Jim along with two assist tugs and McDonough Marine’s barge MARMAC 400.

The HRSG module was successfully loaded onto the MARMAC 400 barge on Aug. 7 and left Port of Coeymans for its 1½-day journey down the Hudson River and New York Harbor to Sewaren, N.J. The combined height of the barge and HRSG module above the water was 135 feet, requiring careful timing to clear the various bridges at the correct tide. The HRSG module was tall enough that it had to be lit in accordance with Federal Aviation Administration regulations.

Transportation of the HRSG module from the Port of Coeymans marine terminal to Sewaren, N.J., was the seventh of nine trips to carry various modules to the new power plant. In addition to performing an engineering review of the roll-on/roll-off calculations and sea fastenings, JMS is conducting the pre-tow surveys of the barge and tugs for all nine of the load outs and tows.

The Sewaren 7 power plant will be a highly-efficient, clean, dual-fuel, 540-megawatt (MW) combined-cycle power plant. Sewaren 7 represents an investment of more than $600 million and is targeted to be in operation in time for summer 2018. Sewaren 7 will bring 540 MWs of highly-efficient generating capacity to New Jersey and the region, supporting electric system reliability. The plant will run primarily on clean, efficient natural gas, but can also run on ultra-low-sulfur distillate fuel oil as a back-up fuel, ensuring exceptional dependability.

The power plant will be constructed at PSEG Power’s existing Sewaren Generating Station in Woodbridge, N.J., replacing four Sewaren generating units, which will be retired after almost 70 years of operation providing energy to New Jersey. By repowering an existing generating site, PSEG is able to take advantage of existing infrastructure, replacing older, less efficient generating units with cleaner, more efficient technology.

By Professional Mariner Staff