Editing Allegheny River (section)

{{short description|River in Pennsylvania and New York, United States}}
{{For|other uses of Allegheny|Allegheny (disambiguation)|Allegany (disambiguation)}}
{{Use American English|date=January 2023}}
{{Use mdy dates|date=January 2023}}
{{Infobox river
 | name                 = Allegheny River
 | native_name          = {{native name|unm|Alikehane}}
 | image                = Freeport bridge.jpg
 | image_caption        = The Allegheny River with [[Freeport, Pennsylvania]] in the background
 | mapframe             = yes
 | mapframe-zoom        = 6
 | source1_location     = [[Allegany Township, Pennsylvania]], near [[Coudersport, Pennsylvania]] at the corner of Ben Green and Cobb Hill Roads
 | source1_coordinates  = {{Coord|41|52|22|N|77|52|30|W|region:US-PA}}<ref name=gnis/>
 | mouth_location       = [[Ohio River]] at [[Pittsburgh]], Pennsylvania
 | mouth_coordinates    = {{Coord|40|26|36|N|80|00|52|W|region:US-PA|display=inline,title}}<ref name=gnis/>
 | mouth_elevation      = {{cvt|712|ft}}<ref name=gnis/>
 | subdivision_type1    = Country
 | subdivision_name1    = [[United States]]
 | subdivision_type2    = State
 | subdivision_name2    = [[Pennsylvania]], [[New York (state)|New York]]
 |length_mi=325
| source1_elevation    = {{cvt|2,450|ft}}<ref name=Sweden/>
 | discharge1_avg       = {{cvt|19750|cuft/s|m3/s}} at the village of [[Natrona, Pennsylvania|Natrona]], PA (river mile 24.3)<ref>[http://wdr.water.usgs.gov/wy2009/pdfs/03049500.2009.pdf USGS Data Report 2009] {{Webarchive|url=https://web.archive.org/web/20210214114158/https://wdr.water.usgs.gov/wy2009/pdfs/03049500.2009.pdf |date=February 14, 2021 }} Retrieved June 16, 2018.</ref>
 |basin_size_mi2=11580
| tributaries_right    = [[Conewango Creek]], [[Brokenstraw Creek]], [[Oil Creek (Allegheny River)|Oil Creek]], [[French Creek (Allegheny River)|French Creek]], [[Bull Creek (Allegheny River)|Bull Creek]], [[Deer Creek (Allegheny River)|Deer Creek]], [[Squaw Run (Allegheny River)|Squaw Run]], [[Pine Creek (Allegheny River)|Pine Creek]], [[Girtys Run]], [[Pucketa Creek]]
 | tributaries_left     = [[Tionesta Creek]], [[Clarion River]], [[Redbank Creek (Pennsylvania)|Redbank Creek]], [[Mahoning Creek (Allegheny River)|Mahoning Creek]], [[Crooked Creek (Allegheny River)|Crooked Creek]], [[Kiskiminetas River]], [[Buffalo Creek (Allegheny River)|Buffalo Creek]], [[Chartiers Run (Allegheny River)|Chartiers Run]]
 | progression          = Allegheny River → [[Ohio River]] → [[Mississippi River]] → [[Gulf of Mexico]]
 | custom_data          = {{Designation list
  | embed               = yes
  | designation1        = nwsr
  | designation1_type   = Recreational
  | designation1_date   = April 20, 1992
  | designation1_number =
 }}
 | extra                = 
}}

The '''Allegheny River''' ({{IPAc-en|ˌ|æ|l|ɪ|ˈ|ɡ|eɪ|n|i}} {{respell|AL|ig|AY|nee}}; {{langx|see|Ohi:yo'}}; {{langx|unm|Alikehane}}) is a {{convert|325|mi|km|adj=mid|-long}} tributary of the [[Ohio River]] that is located in western [[Pennsylvania]] and [[New York (state)|New York]] in the United States. It runs from its headwaters just below the middle of Pennsylvania's northern border, northwesterly into New York, then in a zigzag southwesterly across the border and through [[Western Pennsylvania]] to join the [[Monongahela River]] at the [[Forks of the Ohio]] at [[Point State Park]] in [[Downtown Pittsburgh]], Pennsylvania.

The Allegheny River is, by volume, the main [[headstream]] of both the Ohio and [[Mississippi River]]s. Historically, the Allegheny was considered to be the upper Ohio River by both Native Americans and European settlers.

This shallow river has been made navigable upstream from Pittsburgh to [[East Brady, Pennsylvania|East Brady]] by a series of locks and dams that were constructed during the early 20th century. A 24-mile-long portion of the upper river in [[Warren County, Pennsylvania|Warren]] and [[McKean County, Pennsylvania|McKean]] counties of Pennsylvania and [[Cattaraugus County, New York|Cattaraugus County]] in New York forms the [[Allegheny Reservoir]], which was created by the erection of the [[Kinzua Dam]] in 1965 for [[flood control]].

The etymology behind the word “Allegheny” is of unclear pre-Columbian origin and may be derived from one of a number of [[Delaware language|Delaware]]/[[Unami language|Unami]] phrases that are homophones of the English name, with varying translations.<ref>{{cite web | url=https://www.alleganyhistory.org/research/county-history/2094-allegany-the-name | title=Allegany - the Name }}</ref>