CO 



SD 8. Swan Lake. Acreage: 1968. g 



Location: Walworth County; not yet mapped by the USGS: 4 miles W and 0.5 H 



mile N of Lowry, reached via U.S. 83 N of Pierre and state and county roads. -*- 



O 

 Description: The area is a typical shallow, natural prairie marsh located in the ^ 



upper reaches of the Swan Creek Watershed, which empties into the Oahe O 



Reservoir (Missouri River). The water is normally from 2 to 4 ft deep and al- CJ 



kaline. About 80% of the area is open water, with an abundance of floating 

 aquatic plants. Emergent vegetation occurs along the margins of the lake and on 

 some islands. Waterfowl and shore birds are the principal wildlife, although fur 

 bearers, pheasants, and deer are common. Although the area is not located in a 

 high human population area, public use is high for the number of people in the 

 locality. 



Encroachments: Farming and ranching operations. 



Ownership: State of South Dakota. 



Data source: M. E. Anderson, BSFW, P.O. Box 250, Pierre, S.D. 57501. 



Other knowledgeable persons: W. A. Larson, Box 326, Mobridge, S.D. 57601 . 



