Old Hickory Lock and Dam

The Old Hickory Lock and Dam forms Old Hickory Lake.

Old Hickory Lock and Dam is a dam located in middle Tennessee on the Cumberland River at mile 216.2 in Sumner and Davidson Counties, approximately 25 miles (40 km) upstream from Nashville. The reservoir behind the dam is Old Hickory Lake. The dam and lake are named after President Andrew Jackson (nicknamed "Old Hickory"), who lived in the vicinity at The Hermitage.

Old Hickory Lock and Dam was authorized for construction by the Rivers and Harbors Act of 1946 as a unit of a comprehensive development plan for the Cumberland River Basin. The project was designed by the U.S. Army Corps of Engineers and built by private contractors under the Corp's supervision. Construction started in January 1952, and dam closure was completed in June 1954. The project was completed for full beneficial use in December 1957 with the placement of the final hydroelectric power unit in operation.

The lock allows barges and recreational boats to navigate the Cumberland River.

The power plant is operated so as to use as much of the water flow as possible for power production. During periods of high stream flow, the spillway gates are opened to pass the water in excess of the capacity of the turbines, and as necessary for retention and regulation of floodwaters through surcharge operation. The upper portion of the reservoir, corresponding to a five-foot depth above the normal headwater level, is provided for surcharge storage. This storage space is utilized by raising all of the spillway gates in small equal increments, thus permitting passage of some water under them, but retaining or forcing into storage all inflow to the reservoir in excess of the spillway discharge and power releases.

The reservoir is essentially a run-of-river type without regulating storage other than for incidental flood control through surcharge operation, and for pondage for power generation and lockages; hence, low water flow of the river will be increased only indirectly through the use and passage of discharges from upstream plants. Such releases, however, result in a more sufficient and higher quality of water for domestic and industrial consumption and use are effective in pollution abatement downstream. Due to the fairly constant level maintained under normal operating conditions, the reservoir is well suited for conservation and recreational purposes.

The lock, dam, powerhouse and lake are operated and supervised by the U.S. Army Corps of Engineers' personnel under the direction of the District Engineer at Nashville.

 This article incorporates public domain material from websites or documents of the United States Army Corps of Engineers.

Coordinates: 36°17′48″N 86°39′20″W / 36.29667°N 86.65556°W / 36.29667; -86.65556