The project is off Route 51 near the small town of Glenwillard and across the river from the nearby residential communities of Edgeworth and Sewickley.ĭashields was constructed from 1927-29 and opened for navigation in August 1929. This facility maintains the navigation pool for 7 miles from Glenwillard, Pa., upriver to the Emsworth Locks and Dam near Pittsburgh.ĭashields Lock lies on the left descending bank a few miles upriver from Aliquippa, Pa. It is the only fixed crest type dam still in service on the Ohio River. An incidental benefit derived from the pool formed by the dam is the availability of a source of municipal and industrial water.Įmsworth averages about 470 commercial lockages every month, plus another 350-400 lockages of pleasure craft during the busy summer months.ĭashields Locks and Dam is one of six major Pittsburgh District river facilities on the Ohio River. The dam, however, cannot be operated to control flood flows. As the gates are raised or lowered to control the amount of water flowing under them, the upstream pool is maintained at a relatively constant level for an authorized depth of at least 9 feet throughout its length. Machinery mounted on tall concrete piers moves large chains which lift gates that are hinged into the body of the piers. Gated dams are constructed to permit increased control over the water level in the navigation pool upriver of the dam. The Emsworth project consists of two gated dams, one of the two major types in service in the Pittsburgh District. Rehabilitation included the replacing of electrical systems, operating machinery and buildings and re-surfacing of the lock walls.Īnother rehab of the project is currently underway, and will improve scour protection, vertical lift gates, gate operating machinery and emergency bulkheads. From 1981-86, some $30 million was invested in a major rehabilitation of the facility. This action raised the pool an additional 7 feet to accommodate larger, more modern barges. The Corps rebuilt and converted the dam to a gated structure between 19. Davis Island Lock and Dam was the first federally built navigation project and served as a model for the 52 wicket dams built on the Ohio River to permit reliable river traffic from Pittsburgh to Cairo, Ill. They were: the original Lock and Dam 1 on the Ohio River at Davis Island (completed in 1885) the original Lock and Dam 1 on the Allegheny (1902) and Lock and Dam 1 on the Monongahela (1915). ![]() ![]() The facility replaced three older wicket-type dams which were constructed between 18. The back channel dam is located at Neville Island, Pa.Ĭonstruction began at Emsworth in 1919 and continued until 1922, with the locks first opening in September 1921. This facility stands at the head of the Ohio River navigation system and forms a 24-mile pool on the three rivers around the city of Pittsburgh.Įmsworth Locks and main channel dam are located near the towns of Emsworth, Avalon and Ben Avon, Pa. Emsworth Locks and Dams is one of six major river facilities on the Ohio River in the Pittsburgh Engineer District.
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