dredge

See en.wikipedia.org/wiki/Fagatogo and en.wikipedia.org/wiki/Pago_Pago "From 1878 to 1951, the area was the site of a coaling and repair station for the U.S. Navy, known then as United States Naval Station Tutuila."

In background is USS Hetman (SP-1150), 1917-1921, a 20-ton motor patrol craft, built in 1917 at Greenport, Long Island, for the Russian Government. Purchased by the U.S. Navy in August 1917 and commissioned in October under the name Greenport # 277, she was renamed Hetman a month later in recognition of her Russian origins. After initial service in the New York harbor area, she was sent to Miami, Florida, where she was employed in support of aviation operations from December 1917 until the end of the First World War. Subsequently transferred to Key West, Florida, Hetman was stricken from the Navy list in June 1919 and sold in March 1921.

In background is partial view of USS Velocipede (SP-1258), 1917-1919. Originally the civilian motor boat Velocipede (1917), the USS Velocipede, was a 60-foot section patrol craft, was built in 1917 at Morris Heights, New Jersey, as the civilian pleasure craft of the same name. One of a number of privately-owned motor boats constructed at that time with possible national defense use in mind, she was leased by the Navy in late October 1917 and placed in commission in mid-November. For the rest of World War I, and a few months afterwards, Velocipede was assigned to the Naval Air Station at Miami, Florida. She was returned to her owner in February 1919.

Here's the set from which this photo came, consisting of photos of the naval air station at Dinner Key and its construction and expansion. www.flickr.com/photos/sdasmarchives/albums/72157643423192533

That's "Cucaracha." From the wikipedia article about the Gaillard (Culebra) Cut: "The first and largest major slide occurred in 1907 at Cucaracha. The initial crack was first noted on October 4, 1907, followed by the mass wasting of about 382,000 m³ (500,000 cubic yards) of clay. This slide caused many people to suggest the construction of the Panama Canal would be impossible; Gaillard described the slides as tropical glaciers, made of mud instead of ice. The clay was too soft to be excavated by the steam shovels, and it was therefore largely removed by sluicing it with water from a high level."

We'll fix the typo in the title. Thanks!