Tioga River (Chemung River tributary)

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Tioga River
Tioga river.jpg
The Tioga River near the Pennsylvania–New York state line
USA New York relief location map.svg
Red pog.svg
Location of the mouth of the Tioga River in New York State.
Location
Country United States
State New York, Pennsylvania
Physical characteristics
Source 
  location Armenia Township, Bradford County, Pennsylvania
  coordinates 41°45′40″N76°51′39″W / 41.76111°N 76.86083°W / 41.76111; -76.86083 [1]
Mouth Chemung River
  location
Painted Post, Steuben County, New York
  coordinates
42°09′07″N77°05′25″W / 42.15194°N 77.09028°W / 42.15194; -77.09028 [1]
Length58 mi (93 km) [2]
Discharge 
  location Lindley, New York [3]
  minimum7.2 cu ft/s (0.20 m3/s)
(September 1, 1939) [3]
  average821 cu ft/s (23.2 m3/s)
  maximum63,000 cu ft/s (1,800 m3/s)
(June 23, 1972) [3]
Basin features
Tributaries 
  left Crooked Creek, Cowanesque River, Canisteo River

The Tioga River ( /ˈtɡə/ TY-o-gə) is a tributary of the Chemung River, approximately 58 miles (93 km) long, [2] in northern Pennsylvania and western New York in the United States. It drains a region of ridges in the northern Allegheny Plateau in the watershed of the Susquehanna River.

Contents

In the 19th century, trees logged in the Tioga Valley were extensively used in shipbuilding. Logs were floated down the Tioga to the Chemung and on to the Susquehanna River, the Chesapeake Bay, and the shipyards of Baltimore.

Course

A panoramic view of the Tioga River Valley at Tioga, PA Tioga River Valley at Tioga, PA.jpg
A panoramic view of the Tioga River Valley at Tioga, PA

The Tioga River rises in the mountains of western Bradford County and flows initially southwest into Tioga County, passing through Tioga State Forest. In southern Tioga County it turns north, cutting gaps in four separate ridges while flowing past Blossburg and Mansfield, then through Tioga Reservoir. North of Tioga it receives Crooked Creek from the west, then crosses into Steuben County, New York, near Lawrenceville, Pennsylvania. It receives the Cowanesque River from the west approximately one mile (1.6 km) north of the state line, then receives the Canisteo River from the west in southeastern Steuben County, approximately 10 miles (16 km) southwest of Corning. It joins the Cohocton River at Painted Post, just west of Corning, to form the Chemung River, a tributary of the Susquehanna.

Tioga Reservoir

The Tioga River has one major impoundment, the Tioga Reservoir, formed by a dam just before the borough of Tioga, Pennsylvania. The lake has a surface area of 498 acres (2.02 km2) and is administered by the United States Army Corps of Engineers, which built the Tioga Dam from 1973 to 1979. Built together with the adjoining Hammond Dam and Hammond Lake (on Crooked Creek), the total project cost $200 million.

The dam projects were initially authorized by the United States Congress in the Flood Control Act of 3 July 1958 (Public Law 85-500). Construction was begun in the aftermath of the devastating floods caused by Hurricane Agnes in June 1972, which resulted in widespread damage along the rivers. A channel connects the two lakes so that Hammond Lake (which has greater storage capacity) may be used to store excess (flood) water from Tioga Lake.

In addition to supporting flood control on the Chemung and Susquehanna rivers, the dams are also meant to help improve water quality by decreasing the acidity of water in the Tioga River downstream of the dams; it is diluted by addition of the more neutral waters of Crooked Creek. The Tioga River's acidity is caused by acid mine drainage.

The lakes also offer recreational opportunities, including camping, boating, fishing, swimming, and hiking on area trails.

See also

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References

  1. 1 2 "Tioga River". Geographic Names Information System . United States Geological Survey, United States Department of the Interior . Retrieved April 26, 2016.
  2. 1 2 U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed August 8, 2011
  3. 1 2 3 "01520500 Tioga River near Lindley, NY, Water Data Report 2013" (PDF). National Water Information System. United States Geological Survey. 1930–2013. Retrieved April 26, 2016.