US Army Corps of Engineers
Pittsburgh District

Lock & Dam 9, Allegheny River

Aerial view of Lock & Dam 9, Allegheny River509 Rimerton Road
Templeton, PA 16259-0157
724-868-2486 (unmanned)

Mailing address/contact:
830 River Road
Freeport, PA 16229-2031
724-295-2261

Current Status
Allegheny River Lock and Dam 9 is in a caretaker status (IMTS Level 6). It will remain closed indefinitely except for commercial appointment lockages.

Location
Lock and Dam 9 is located at river mile 62.2 near Rimer, Pa., in Armstrong County.

History
Lock and Dam 9 was built from 1935-1938 and opened in 1938.

Project Information
Lock and Dam 9, like all navigation facilities on the Allegheny River, consists of a single lock chamber and a fixed crest dam. This type of dam is basically a concrete weir, or wall, across the river which keeps the river channel upriver of the project deep enough for navigation -- about 9 feet or more.  Water which flows over this type of dam cannot be controlled locally. Consequently, it cannot provide any control over flood waters.  An incidental benefit derived from the pool formed by the dam is the availability of a source of municipal and industrial water.