Jacks Island (Pennsylvania)

The Allegheny River Lock and Dam No. 4 in Harrison Township, Allegheny County, Pennsylvania, is a lock that was built 1920-1927, and opened in 1927, 24.2 miles upstream from the mouth of the river in Pittsburgh. The lock and dam were built by the U.S. Army Corps of Engineers as a part of an extensive system of locks and dams to improve navigation along the Allegheny River. It is located about 24.2 Miles up the Allegheny River from the Point in Downtown Pittsburgh. Also, it is about 6 Miles down the Allegheny from the mouth of the Kiskiminetas River.Upriver, Allegheny Pool No. 4 has an average water elevation of 745.4 feet above sea level and extends about 6.2 miles upriver to Allegheny River Lock and Dam No. 5. Downriver, Allegheny Pool No. 3 has an average water elevation of 734.5 feet above sea level and extends about 9.7 miles downriver to Allegheny River Lock and Dam No. 3. Thus Lock No. 4 lifts and lowers boats about 10.9 feet between the pools.It has a single lock and a fixed-crest dam, keeping the river depth at least 9 feet in the pool above the dam. The amount of water that flows over the dam is not controlled locally, so it does not provide flood control, but it does help provide water to municipalities.Traffic through the lock was about 1.8 million tons in 1998, including shipments of coal, petroleum, sand and gravel, ore, steel, chemicals, fertilizer, salt, flour, lime, and slag.It was listed on the National Register of Historic Places on April 21, 2000.

Pennsalt Historic District (also known as Pennsalt Company Houses) is a historic district in Natrona, Pennsylvania.According to the Library of Congress, the Pennsalt Historic District, is "an early and architecturally intact collection of housing built by the Pennsylvania Salt Manufacturing Company," and "is a significant example of a western Pennsylvania company town of the mid to late 19th century."

Natrona is an unincorporated community in Harrison Township, Allegheny County in the U.S. state of Pennsylvania. It is located in western Pennsylvania within the Pittsburgh Metropolitan Statistical Area, approximately 24 miles (39 km) northeast of Downtown Pittsburgh. Natrona is situated along the Allegheny River at Lock and Dam Four, Pools Three and Four between Brackenridge, Natrona Heights, Karns, Allegheny Township, and Lower Burrell.

Karns is an unincorporated community in Harrison Township, Allegheny County, Pennsylvania, United States; it is located in Western Pennsylvania within the Pittsburgh Metropolitan Statistical Area, approximately 24 miles (39 km) northeast of Pittsburgh. Karns is situated along the Allegheny River at Pool 4 across from Jacks Island just above Lock and Dam 4 between Natrona, Natrona Heights, and Sligo. The elevation of Karns is 817 feet above sea level.The postal ZIP code is 15065, while the telephone area codes are 724 and 878; although the code 878 is not used.

Highlands High School is a suburban, public secondary school in the Natrona Heights neighborhood of Harrison Township in the U.S. state of Pennsylvania. It is part of the Highlands School District and has a current enrollment of about 800 students in grades nine through twelve.

Harrison Township is a township in Allegheny County in the U.S. state of Pennsylvania. The population was 10,169 at the 2020 census. Pennsylvania Route 28 passes through Harrison Township, connecting Kittanning to the northeast and Pittsburgh to the southwest. Allegheny Technologies has extensive steel mill facilities in Harrison Township, including its Allegheny Ludlum Brackenridge Works. Harrison Township is located at the far northeast corner of Allegheny County. Its northern border is the Butler County line and the Allegheny River forms the township's eastern boundary with Westmoreland County. Its northeast corner also touches Armstrong County.

Saint Joseph High School is a private, parochial Roman Catholic high school in Harrison Township, Pennsylvania. It is the only parish-operated high school in the Diocese of Pittsburgh.

Natrona Heights is an unincorporated community in Harrison Township, Allegheny County in the U.S. state of Pennsylvania. It is located in Western Pennsylvania within the Pittsburgh Metropolitan Statistical Area, approximately 24 miles (39 km) northeast of Pittsburgh. Natrona Heights is situated near the Allegheny River, Natrona, Brackenridge, and Tarentum.

Chartiers Run is a tributary of the Allegheny River located in Westmoreland County in the U.S. state of Pennsylvania. It was named after Peter Chartier, a trapper of French and Native American parentage who established a trading post at the mouth of Chartiers Creek in 1743.

The Burtner House (also known as the Burtner Stone House) is an historic home which is located on Burtner Road in Harrison Township, Allegheny County, Pennsylvania in the United States. It was added to the National Register of Historic Places in 1972.

Brackenridge Works is a specialty steel mill facility owned by Allegheny Technologies and operated by its Flat-Rolled Products segment in the Pittsburgh suburbs of Natrona, Pennsylvania.

Highlands Mall is a former shopping mall in Harrison Township, Pennsylvania that operates today as an open-air shopping center. It opened in 1977 and closed in 2006, reopening after its redevelopment in 2008.