South Anna River
Encyclopedia
The South Anna River is a principal tributary
Tributary
A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Pamunkey River
Pamunkey River
The Pamunkey River is a tributary of the York River, about long, in eastern Virginia in the United States. Via the York River it is part of the watershed of Chesapeake Bay.-Course:...

, about 102 miles (164.2 km) long, in central Virginia
Virginia
The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...

 in the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. Via the Pamunkey and York
York River (Virginia)
The York River is a navigable estuary, approximately long, in eastern Virginia in the United States. It ranges in width from at its head to near its mouth on the west side of Chesapeake Bay. Its watershed drains an area including portions of 17 counties of the coastal plain of Virginia north...

 rivers, it is part of the watershed
Drainage basin
A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

 of Chesapeake Bay
Chesapeake Bay
The Chesapeake Bay is the largest estuary in the United States. It lies off the Atlantic Ocean, surrounded by Maryland and Virginia. The Chesapeake Bay's drainage basin covers in the District of Columbia and parts of six states: New York, Pennsylvania, Delaware, Maryland, Virginia, and West...

.

According to the Geographic Names Information System
Geographic Names Information System
The Geographic Names Information System is a database that contains name and locative information about more than two million physical and cultural features located throughout the United States of America and its territories. It is a type of gazetteer...

, it has also been known as the Anna River.

Course

The South Anna River rises near Gordonsville
Gordonsville, Virginia
Gordonsville is a town in Louisa and Orange counties in the U.S. state of Virginia. The population was 1,496 at the 2010 census.-History:Nathaniel Gordon purchased in 1787 and in 1794, or possibly earlier, applied for and was granted a license to operate a tavern...

 in southwestern Orange County
Orange County, Virginia
As of the census of 2000, there were 25,881 people, 10,150 households, and 7,470 families residing in the county. The population density was 76 people per square mile . There were 11,354 housing units at an average density of 33 per square mile...

 and flows generally southeastwardly and eastwardly through Louisa
Louisa County, Virginia
Louisa County is a county located in the Commonwealth of Virginia. As of 2010, the population was 33,153. The county seat is Louisa.- History :...

 and Hanover
Hanover County, Virginia
As of the census of 2000, there were 86,320 people, 31,121 households, and 24,461 families residing in the county. The population density was 183 people per square mile . There were 32,196 housing units at an average density of 68 per square mile...

 counties. It joins the North Anna River
North Anna River
The North Anna River is a principal tributary of the Pamunkey River, about long, in central Virginia in the United States. Via the Pamunkey and York rivers, it is part of the watershed of Chesapeake Bay...

 to form the Pamunkey River about 5 miles (8 km) northeast of Ashland
Ashland, Virginia
Originally known as Slash Cottage, Ashland is located on the Old Washington Highway U.S. Route One and the Richmond, Fredericksburg and Potomac Railroad, a busy north-south route now owned by CSX Transportation...

.

Near its mouth the river collects the Newfound River
Newfound River (Virginia)
The Newfound River is a tributary of the South Anna River in east-central Virginia in the United States. Via the South Anna, Pamunkey and York rivers, it is part of the watershed of Chesapeake Bay....

.
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