The Ross Barnett Reservoir (colloquially known as "The Rez") is an impoundment of the Pearl River

Pearl River (Mississippi-Louisiana)

The Pearl River is a river in the U.S. states of Mississippi and Louisiana. It forms in Neshoba County, Mississippi from the confluence of Nanih Waiya and Tallahaga creeks. It is long. The Yockanookany and Strong rivers are tributaries. Northeast of Jackson, the Ross Barnett Reservoir is formed by...

 between Madison

Madison County, Mississippi

-Demographics:As of the census of 2000, there were 74,674 people, 27,219 households, and 19,325 families residing in the county. The population density was 104 people per square mile . There were 28,781 housing units at an average density of 40 per square mile...

 and Rankin Counties

Rankin County, Mississippi

-Demographics:As of the census of 2000, there were 115,327 people, 42,089 households, and 31,145 families residing in the county. The population density was 149 people per square mile . There were 45,070 housing units at an average density of 58 per square mile...

 in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Mississippi

Mississippi

Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...

. The 33000 acres (133.5 km²) lake serves as the state's largest drinking water resource, and is managed by the Pearl River Valley Water Supply District. The lake features 105 miles (169 km) of shoreline impounded on the south by a 3.5 miles (5.6 km) man-made dam and spillway.