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Present U.S. Locks MacArthur Lock Named after World War II Gen. Douglas MacArthur, the MacArthur Lock is 800 feet long (243.8 meters) between inner gates, 80 feet wide (24.4 meters) and 31 feet deep (9.4 meters) over the sills. The lock was built in 1942-43 and opened to traffic on July 11, 1943.The largest vessel that can transit the MacArthur Lock is 730 feet long (222.5 meters) by 76 feet wide (23 meters). In emergencies, this limit may be exceeded for vessels up to 767 feet in length (233.8 meters). Poe Lock The Poe Lock is 1,200 feet long (365.8 meters), 110 feet wide (33.5 meters) and has a depth over the sills of 32 feet (9.8 meters). Named after Col. Orlando M. Poe, it was built by the U.S. in the years 1961-68. The lock’s vessel size limit is 1,100 feet long (335.3 meters) by 105 feet wide (32 meters). Davis Lock Named after Col. Charles E.L.B. Davis, the Davis Lock measures 1,350 feet long (411.5 meters) between inner gates, 80 feet wide (24.4 meters) and 23 feet deep (7 meters) over the sills. Built in 1908-14, it sees limited use due to its shallow depth. Sabin Lock The same size as the Davis Lock, the Sabin Lock was built from 1913-19.The lock is currently inactive. KYS ‘05 which had mining interests in the area. Convinced that a canal was possible and could turn a profit for its builders, he wired his employers for permission to proceed. Fairbanks’ Officials gave Harvey the green light and appointed him their on-site agent. Ground was broken on June 4, 1853. Despite frigid winters, the dangerous process of dynamiting through solid rock and an outbreak of cholera that decimated the lock work force during the winter of 1854-55, the canal was completed just within a state-mandated two-year timetable, on May 31, 1855, at a cost of about $1 million. The State Lock consisted of two locks in tandem, each 350 feet long, 70 feet wide and 9 feet deep. Harvey Full steam ahead Tonnage passing through the State Locks increased from 14,503 tons in 1855 to 284,350 tons in 1864, most of it grain, copper and iron ore. In 1881, the U.S. government assumed operation of the lock from the state of Michigan and passage was made toll-free. A new lock, the Weitzel, opened in 1881. Harvey's State Lock was also demolished in the early 1880s, making way for the first Poe Lock, which opened to traffic in 1896. In 1905, Sault Ste. Marie celebrated the 50th anniversary of its waterway with a festival during which the town received many commemorative gifts, including a Japanese torii ornamental stone gate that sits today near the locks park main entrance. Harvey, then in his 70s, attended and was honored as the man who broke the barrier to Lake Superior. As vessels grew steadily larger, the Davis and Sabin locks were placed in service in 1914 and 1919, respectively. The MacArthur Lock was built to replace the aging Weitzel Lock during World War Il, at which time a regiment of