Sediment is often viewed as a problem threatening the flow and life of rivers and streams. But now scientists are beginning to note that a shortage of the stuff -- much of it trapped behind dams -- in the presence of changing weather patterns and rising seas will lead to problems along the world's coastal wetlands.
Five years after the Duluth, Minn., area suffered devastating floods, recovery work is still underway, including the building of culverts and bridges better able to deal with heavier rains. Officials believe the area is better prepared for another event of the sort, but former Duluth Mayor Don Ness says that some damage will be unavoidable, since "because of the way FEMA looks at these types of projects, there was funding to replace the infrastructure, as it existed prior to the storm."
While the Navy and the US mourn the loss of seven sailors who perished when the destroyer USS Fitzgerald and a container ship collided over the weekend off the coast of Japan, the Navy is left to figure out how to handle the temporary loss of a critical asset in the Western Pacific theater. The Fitzgerald, an Arleigh Burke-class destroyer with advanced anti-sub warfare equipment that is capable of performing Ballistic Missile Defense missions, was severely damaged.
The destroyer USS Sterett's visit to the Chinese port of Zhanjiang provides "an exciting opportunity to promote maritime cooperation and reinforce a navy-to-navy relationship with our People's Liberation Army-Navy counterparts," said the ship's commanding officer.
Metal parts up to 35 cubic feet will be 3D printed with what GE plans as the world's largest laser-powder additive-manufacturing device. GE sees applications in aviation, including structural components for jet engines, and other industries, because the machine will be able to print in a variety of metals, including aluminum and titanium.
South Korea is playing host this week to a live-fire exercise with US and Canadian forces in waters near Jeju Island. The participants will engage in drills focused on interdiction, air defense, anti-submarine operations and ballistic missile detection as well as live-fire training.
Raytheon Missile Systems will be providing surface-to-air Standard Missile-2s and spares for the US Navy and allies under a $618 million Defense Department contract. The Standard Missile-2 is the Navy's primary long-range surface-to-air missile and part of the Aegis Combat System.
Marine Hydraulics International has secured the third of three Navy ship-repair contracts. The $12.3 million contract for work on the destroyer Nitze comes after MHI won two previous contracts for the destroyer Mason and the landing ship Whidbey Island.
The Coast Guard is exploring whether commercially available diesel outboard motors for some of its smaller craft would allow it to convert to just one type of fuel for its entire fleet. Possible advantages are seen in fuel contracts, logistics, storage, maintenance and training.
The Navy is laying the groundwork to bring back the well deck for a new America-class Amphibious Assault Ship. The surface attack technology will add a new dimension of amphibious warfare capability to the planned LHA 8 (Bougainville), whose construction is scheduled to begin late next year.
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