Sac River

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Map of the Osage River watershed showing the Sac River

The Sac River is a river in southwest Missouri. It is 118 miles (190 km) long,[1] with headwaters in Lawrence and Greene counties; the headwaters join near Greenfield, then flow north through the Ozarks, to the Osage River, ending just above Osceola in Truman Reservoir.

Large portions of the Sac River and the Little Sac River are inundated by Stockton Lake.

The Big Eddy Site, an archaeological dig, is along the Sac River within Cedar County. Eleven feet of river sediment at the site provides a stratigraphy that suggests more than 10,000 years of nearly constant occupation by American Indians, potentially pre-dating the Clovis culture and contributing to the knowledge of the Dalton and San Patrice cultures.


Confluence with the Osage River in an arm of the Harry S. Truman Reservoir in St. Clair County, Missouri: 38°01′00″N 93°43′08″W / 38.01670°N 93.71882°W / 38.01670; -93.71882 (Sac River mouth)[2]
Greene County, Missouri: 37°12′39″N 93°26′04″W / 37.21088°N 93.43436°W / 37.21088; -93.43436 (Sac River source)[2]


  1. ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed May 31, 2011
  2. ^ a b "Sac River". Geographic Names Information System. United States Geological Survey. Retrieved 2014-01-24. 

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