DREDGING This has been great for us and for Weeks Marine. We were able to drastically cut down the engineering timeframe at the front of the project, get a quick start on construction, and continue construction with good information to build the vessel quickly and efficiently. Domestic operators get as much life out of their dredges as they can, so we can expect to see the R.B. Weeks work alongside the Magdalen for many decades to come. “The integrated electrical power, propulsion, and dredge machinery package remained nearly identical to the Magdalen’s,” said D’Isernia. “Updated EPA emissions regulations required upgrading the engines from Tier II to Tier IV. It was very convenient that the Magdalen had GE [now Wabco] engines because this manufacturer opted for EGR to meet Tier IV requirements rather than urea after treatment.” Royal IHC has also been awarded a contract for the design and engineering of a 6,500-cubic-yard TSHD for Cashman Dredging and Marine Contracting Co., LLC of Quincy, Mass. The new vessel will complement Cashman Dredging’s current fleet of specialized dredging equipment and will primarily ser vice the coastal protection and navigation maintenance
markets when it enters service in 2024.
convenient access for future maintenance.
Biggest in U.S. fleet
Callan to add its first TSHD
What will be the largest TSHD in operation in the U.S. when it is delivered, is a 15,000-cubic-yard hopper capacity vessel under construction for Seattle, Wash., based Manson Construction Co. at the Keppel AmFELS shipyard in Brownsville, Texas. To be named Frederick Paup, it has a length of 420 feet, breadth of 81 feet and draft of 28.5 feet. Slated to be fully operational by spring 2023, it marks Manson’s single biggest investment in its 115-year history. Designed in collaboration with naval architecture firm Hockema Whalen Myers Associates Inc., the dredge is to be equipped with three Schottel type SRP 510 L FP RudderPropellers. Schottel says that the well-elaborated hull design concept allows for the propulsion system to be integrated in an exceptional manner. The aft appendages are optimally tailored to the rudder propellers in order to supply the thrusters with the lowest-possible turbulence flow. A long propeller arm length allows for an arrangement at the stern in portside, center and starboard positions with
The Frederick Paup may not keep its “largest in the U.S.” title for long. Galveston, Texas, headquartered Callan Marine continues to expand its fleet. Last year, it released the tender package for a TSHD with a hopper capacity of 16,000 cubic yards. To be named the Admiral Nimitz, it will have an overall length of 422 feet and a breadth of 92 feet. The diesel-electric powered dredge will have a maximum draft of 28.8 feet, a maximum dredging depth of 100 feet in the short dredge pipe configuration, and 130 feet in the long dredge pipe configuration. It will accommodate a crew of 28. Currently the Callan fleet includes six cutter suction dredges of various sizes. Why add the TSHD? “The Admiral Nimitz will be a robust, powerful addition to the capacity of the Callan fleet,” said Maxie McGuire, president of Callan Marine, when plans for the new TSHD were announced. “As the market continues to require maintenance dredging at an unprecedented rate, the Nimitz will allow Callan to respond quickly and efficiently to projects along the coast.
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28 Marine Log // May 2022
5/7/21 9:30 AM
