Posted on April 23, 2020
Bollinger Shipyards Lockport, LLC yesterday delivered an articulated tug-barge (ATB) unit capable of transporting multiple clean petroleum products in the Alaska market to Crowley Fuels LLC – the Alaska-based petroleum transportation, distribution and sales unit of Crowley Maritime Corporation.
The ATB is the first in Crowley’s fleet to be dedicated to the Alaska market. The barge is named Oliver Leavitt, in honor of ASRC’s former chairman and current member of the corporation’s board of directors, with the tug bearing the name Aveogan, Leavitt’s Iñupiat name.
The Alaska class ATB unit consists of one twin Z-Drive, 7,000-HP ocean tugboat measuring 128 feet x 42 feet x 21 feet, paired with a 100,000-BBL ocean barge measuring 400 feet x 85 feet x 32 feet. As a unit, with the tug mated into the barge, the ATB measures 483 feet in length.
Jensen Maritime, Crowley Shipping’s Seattle-based naval architecture and marine engineering subsidiary, designed the ATB to meet Ice Class and Polar Code requirements, which include increased structural framing and shell plating and extended zero discharge endurance. The double-hulled design also features a barge form factor to achieve high-cargo capacity on minimal draft.
The ATB was constructed at the Bollinger Marine Fabricators shipyard in Amelia, La., with on-site construction management by Crowley Shipping, which designs, manages the construction of and operates a range of vessel types, including tank vessels.
Crowley will operate the ATB for Alaska-based Petro Star Inc., a wholly owned subsidiary of Arctic Slope Regional Corporation (ASRC) under a long-term charter. The agreement extends Crowley’s longstanding partnership with ASRC and Petro Star, which dates back four decades to ASRC’s earliest days. Crowley Shipping’s petroleum services group, the largest operator of independent U.S. petroleum transportation vessels, will operate the ATB on behalf of Crowley Fuels.
“We are pleased to take delivery of this high-performance ATB, Aveogan-Oliver Leavitt, and look forward to getting her up to Alaska to begin serving our partners at Petro Star,” said Rocky Smith, senior vice president and general manager, Crowley Fuels. “We congratulate the men and women at Jensen who designed the vessel and the team at Bollinger Shipyards who built it.”
“On behalf of the many talented craftsmen and craftswomen and a strong operational support group, the Bollinger team is proud to have built this ATB for Crowley Fuels,” said Bollinger Shipyard’s President and CEO Ben Bordelon. “This contract to build another Jones Act classed ATB unit has created many jobs for U.S. mariners, shipyards and ancillary vendors.”
“The new vessel’s advanced design and environmental protection features mark a new era for fuel transportation services in Alaska,” said Rick Meidel, vice president and general manager, Crowley Fuels Alaska. “She will give many years of safe and reliable service for our valued customer Petro Star.”
The tug has azimuthing drives to enhance maneuverability, and an Intercon C-series coupling system with a first-of-its-kind lightering helmet. The tug is fitted with two GE 8L250 main engines that meet U.S. Environmental Protection Agency’s Tier 4 emissions standards. The generators on the tug and barge meet EPA Tier 3 and IMO Tier II emissions standards.
In addition, the ATB features a patent-pending closed loop, freshwater ballast system whereby the tug’s ballast will be transferred to-and-from a retention tank on the barge to account for fuel burn. The design has been approved by the USCG and will eliminate the need to discharge tug ballast water into the sea.
The tug is equipped with a fire monitor and foam proportioner, providing off-ship firefighting capabilities to the barge. The barge is also outfitted with spill response gear and a hydraulic boom reel with 2,000 linear feet of inflatable boom to support spill response efforts.
The ATB was designed under the Safety of Life at Sea (SOLAS) Convention and it will be classed with the American Bureau of Shipping (ABS). The vessel was built with enhanced features to benefit the crew, including 45-degree sloped staircases, interior sound deadening and dedicated heads in each cabin.
Crowley operates and manages the largest U.S.-flag petroleum and chemical tank vessel fleet in the country, including 40 other Jones Act qualified large petroleum transportation vessels that carried nearly 590 million barrels of product with more than 6,200 transfer in 2019.
Source: marinelog
