McAlpine Locks and Dam

38°16′41″N 85°47′32″W / 38.2781°N 85.7922°W / 38.2781; -85.7922Opening date1830Operator(s)United States Army Corps of Engineers Louisville DistrictDam and spillwaysImpoundsOhio RiverPower StationOperator(s)Louisville Gas & ElectricInstalled capacity80 MW

The McAlpine Locks and Dam are a set of locks and a hydroelectric dam at the Falls of the Ohio River at Louisville, Kentucky. They are located at mile point 606.8, and control a 72.9 miles (117.3 km) long navigation pool. The locks and their associated canal were the first major engineering project on the Ohio River, completed in 1830 as the Louisville and Portland Canal, designed to allow shipping traffic to navigate through the Falls of the Ohio.

History

From 1925 to 1927, the dam for generating hydroelectric power was added, and the locks were expanded, first by a private company and then by the U.S. Army Corps of Engineers. The hydroelectric plant at the time was the seventh largest hydroelectric plant in the United States.

The system was renamed the McAlpine Locks and Dam in 1960 in honor of William McAlpine, who was the only civilian to have ever served as district engineer for the Corps of Louisville. At present, the normal pool elevation is 420 feet (130 m) above sea level and the drainage area above the dam is 91,170 square miles (236,000 km²). The average daily flow at McAlpine is 118,000 cubic feet per second (3,340 m³/s). The lock chambers are located at the dam on the Kentucky side of the Ohio River and are capable of a normal lift of 37 feet (11 m) between the McAlpine pool upstream and the Cannelton pool downstream. The hydroelectric plant consists of eight turbine units with a net power generation capacity of 80,000 kilowatts.

In October 2003, McAlpine was designated a Historic Civil Engineering Landmark by the American Society of Civil Engineers.

The McAlpine locks underwent a 10-year, $278 million expansion project scheduled to be completed in 2008, but was completed in early 2009.

Ownership

The hydroelectric plant is owned and operated by Louisville Gas & Electric, a subsidiary of PPL Corporation while the locks are operated by the Army Corps of Engineers.

See also

• List of crossings of the Ohio River
• List of locks and dams of the Ohio River
• Transportation in Louisville, Kentucky
• List of attractions and events in the Louisville metropolitan area

Gallery

• 
  Chart of Falls of the Ohio and Portland Canal from 1916
• 
  Locks and Dam No 41 navigation chart from 1934
• 
  McAlpine Locks and Dam navigation chart (detail) from 2010
• 
  Aerial view of Falls of the Ohio and Locks and Dam No 41 circa 1930s or 1940s
• 
  Aerial view of McAlpine Locks circa 2000
• 
  Towboat Brimstone entering auxiliary lock at McAlpine Locks, 1987
• 
  Towboat Steel Trader departing auxiliary lock at McAlpine Locks, 1987
• 
  Dewatered main lock undergoing repairs at McAlpine Locks, 1987
• 
  Coast Guard buoy tender Obion entering main lock at McAlpine Locks, 1999
• 
  Towboat Enid Dibert departing main lock at McAlpine Locks, 1999
• 
  LG&E Ohio Falls Generating Station at McAlpine Dam, 1998
• 
  Tainter gate at McAlpine Dam, 1998
• 
  Fourteenth Street Bridge pier and upper gates of McAlpine Dam, 1998

External links

• LG&E Plants
• McAlpine Locks and Dam 2007 version from Wayback Machine
• McAlpine Locks and Dam from U.S. Army Corps of Engineers. Retrieved 29 April 2017
• McAlpine Locks and Dam fact sheet from U.S. Army Corps of Engineers. Retrieved 29 April 2017
• History of navigation development on the Ohio River from U.S. Army Corps of Engineers. Retrieved 29 April 2017
• Robinson, Michael C. (1983). History of Navigation in the Ohio River Basin (NWS-83-5) (PDF). National Waterways Study, Institute for Water Resources, U.S. Army Corps of Engineers. Retrieved 30 April 2017. Provides historical context for McAlpine Locks and Dam; good bibliography.