Grays Landing Lock & Dam
Encyclopedia
Grays Landing Lock and Dam, previously known as Lock and Dam Number 7, is one of nine navigational structures on the Monongahela River
between Pittsburgh
, Pennsylvania
and Fairmont
, West Virginia
. Maintained and built by the U.S. Army Corps of Engineers, the gated dam forms an upstream pool that is 11.2 miles (18 km) long, stretching to the base of the Point Marion Lock and Dam
. It is located at river mile
82.
There is one lock chamber on the left descending bank of the river at the dam. The reservoir formed by the dam is also a municipal and industrial water supply. The structure is the third on the site. Originally, an 1880s stone masonry structure sat in this location; it was replaced in 1923 by a modern dam.
Monongahela River
The Monongahela River is a river on the Allegheny Plateau in north-central West Virginia and southwestern Pennsylvania in the United States...
between Pittsburgh
Pittsburgh, Pennsylvania
Pittsburgh is the second-largest city in the US Commonwealth of Pennsylvania and the county seat of Allegheny County. Regionally, it anchors the largest urban area of Appalachia and the Ohio River Valley, and nationally, it is the 22nd-largest urban area in the United States...
, Pennsylvania
Pennsylvania
The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...
and Fairmont
Fairmont, West Virginia
Fairmont is a city in Marion County, West Virginia, United States. Nicknamed "The Friendly City". The population was 18,704 at the 2010 census...
, West Virginia
West Virginia
West Virginia is a state in the Appalachian and Southeastern regions of the United States, bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the northeast and Maryland to the east...
. Maintained and built by the U.S. Army Corps of Engineers, the gated dam forms an upstream pool that is 11.2 miles (18 km) long, stretching to the base of the Point Marion Lock and Dam
Point Marion Lock and Dam
Point Marion Lock and Dam, previously known as Lock and Dam Number 8, is one of nine navigational structures on the Monongahela River between Pittsburgh, Pennsylvania and Fairmont, West Virginia. Maintained and built by the U.S. Army Corps of Engineers, the gated dam forms an upstream pool that is ...
. It is located at river mile
River mile
In the United States, a River mile is a measure of distance in miles along a river from its mouth. River mile numbers begin at zero and increase further upstream. The corresponding metric unit using kilometers is the River kilometer...
82.
There is one lock chamber on the left descending bank of the river at the dam. The reservoir formed by the dam is also a municipal and industrial water supply. The structure is the third on the site. Originally, an 1880s stone masonry structure sat in this location; it was replaced in 1923 by a modern dam.