Jacks Island is an

alluvial Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluv ...

island An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island ...

in the

Allegheny River The Allegheny River ( ) is a long headwater stream of the Ohio River in western Pennsylvania and New York (state), New York. The Allegheny River runs from its headwaters just below the middle of Pennsylvania's northern border northwesterly into ...

. Its southwestern half lies in the city of

Lower Burrell Lower Burrell is a city in Westmoreland County in the U.S. state of Pennsylvania. Located approximately 18 miles northeast of downtown Pittsburgh, it is part of the Pittsburgh metropolitan area. The population was 11,761 at the 2010 census. The po ...

, while its northeastern half lies in Allegheny Township, in Westmoreland County in the U.S. state of

Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...

. The island is situated across from Harrison Township in

Allegheny County Allegheny County () is a County (United States), county in the Commonwealth (U.S. state), Commonwealth of Pennsylvania. It is located in Southwestern Pennsylvania. As of the 2020 census, the population was 1,250,578, making it the state's seco ...

. The elevation of Jacks Island is 745 feet above

sea level Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardised g ...

References

External links

U.S. Army Corps of Engineers navigation chartsWestmoreland County, Pennsylvania islands
River islands of Pennsylvania Islands of the Allegheny River in Pennsylvania Landforms of Westmoreland County, Pennsylvania {{Pittsburgh-stub