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2021 January February Marina World

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The magazine for the marina industry

Are your float drums

Are your float drums certified by an accredited testing agency? They should be. Ask for Ace Floats by name! Tested and Certified by IMANNA Laboratory Inc. Falling Dart Impact Test 7-Day Hunt Water Absorption Test Encasement Wall Thickness Standard And More! IMANNA Certified For over 25 years, Den Hartog Industries in Hospers, Iowa has elevated the quality of foam-filled float drums, setting the industry standards and is a leader in the marine industry on quality, durability and longevity. Visit for a variety of product sizes, specifications with bouyancy and technical information.

PONTOON/DOCK SYSTEMS & DECKING Robust rebuild for US marina In 2019, Lars Vinjerud II, owner of a scallop and lobster fishing and distribution operation, bought Leroy’s Marina, a mixed commercial and recreational marina on Pope’s Island, New Bedford, Massachusetts. He renamed the site Fleet Marina and decided to renovate and modernise it. The first phase involved replacing the existing pile-supported pier with an extra-wide floating concrete SF Marina breakwater that would double as a dock for commercial vessels. AGM Marine Contractors designed the marina layout and SF Marina manufactured the components at its Norfolk, Virginia location. The modules were then moved by barge to Popes Island where AGM installed the 262ft (80m) long x 16ft (5m) wide SF500 Series breakwater. Engineered to withstand hurricanelevel storms, the individual floating concrete pontoons are connected with an advanced energy-absorbing coupling system and moored with eight 80ft (24m) long x 36in (91cm) wide steel piles. Virtually unsinkable and able to bear regular vehicular traffic, the individual sections each have a buoyancy rating of 100psf. They are also extremely robust to withstand the heavy use placed upon them by fishing vessels and easily able to accommodate vessels that range up to 100ft (30m) in length and weigh up to 200 tonnes. Functioning as a working dock, the SF500 Series pontoon sections have integrated utility conduits, and multiple 100A three-phase electrical pedestals and fresh water services have been installed. In phase two, AGM reconfigured the recreational side of Fleet Marina with 120ft (36.6m) of SF Marina SF1024 floating dock. The structure includes slips for two to four boats up to 120ft (36.6m) in length. With a low centre of gravity, the docks are extremely stable, making them ideal for recreational use. And, as they are engineered to withstand the freezing weather and severe storms common in Sweden, they are perfect for use in New England. “We’ve been installing SF Marina docks and breakwaters for about nine years,” says Jonah Mikutowicz, AGM Marine Contractors project manager. “They’re easy to install and the reaction from our customers is always very positive,” he adds. Calming the LaSalle basin Kropf Industrial has completed a successful floating breakwater project for the City of Burlington, Ontario. The work involved the removal of an existing floating breakwater system that was at the end of its life, and the design, manufacture, delivery and installation of a replacement. The new breakwater, which provides a safe and tranquil marina environment for the LaSalle Marina Association, as well as the public launch ramps at LaSalle Pier, measures over 1,360ft (414.5m) in length and was installed in three sections. The bulk of the breakwater is 17ft (5m) wide with a shorter portion of 14ft (4m) width at the marina entrance. The system was built using Kropf’s proven and tested box breakwater design, with full-length steel pipe floats and a steel plate wave attenuation structure with a draft of 72in (183cm). It is anchored in place using concrete anchors and heavy chain, and includes solar lighting and signage. Kropf’s breakwater designs have been extensively tested by the Canadian National Research Council and are proven in northern ice conditions and high-energy sites. The project included a wave study of the area and final design of the breakwater and anchoring system. – January/February 2021 35

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