Big Stone Lake
Oversvømmelse i 2007 mellem søerne Lake Traverse for neden og Big Stone Lake øverst
Big Stone Lake er en lang smal sø, som udgør en del af grænsen mellem delstaterne Minnesota og South Dakota i USA. Søen er 42 km lang og ca. 2 km bred, har et areal på 5.100 ha og en dybde op til 4,9 m. Den udgør egentlig resterne af en flod, som fandtes på stedet under en tid efter den seneste istid og afvandede den dengang store sø Lake Agassiz. Big Stone Lake er dannet, hvor floddalen dengang var dybest. Søen får sit vand fra nord fra Little Minnesota River og afvandes mod syd af Minnesota River. I øens sydlige ende er der et stort dæmningsanlæg.
Nord for søen ligger Traverse Gap, hvor vandskellet mellem Hudson Bay den Mexicanske Golfs afvandingsområde går.
Koordinater: 45°24′28″N 96°37′04″V / 45.40778°N 96.61778°V
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Browns Valley flood 07.jpg
Forfatter/Opretter: JOR Engineering, Inc., Licens: CC BY-SA 3.0
Aerial photograph showing the Traverse Gap in Minnesota and South Dakota and flooding at Browns Valley, Minnesota, from ice-covered Lake Traverse (bottom of frame), south to Big Stone Lake (top of image). Interbasin flooding is shown: The Little Minnesota River, which originates in the Mississippi watershed, enters the Traverse Gap from the west (right) and flows south to Big Stone Lake, is flooding the gap and Browns Valley (center); at the lower right floodwaters are crossing the continental divide into Lake Traverse in the watershed of Hudson Bay.
Forfatter/Opretter: JOR Engineering, Inc., Licens: CC BY-SA 3.0
Aerial photograph showing the Traverse Gap in Minnesota and South Dakota and flooding at Browns Valley, Minnesota, from ice-covered Lake Traverse (bottom of frame), south to Big Stone Lake (top of image). Interbasin flooding is shown: The Little Minnesota River, which originates in the Mississippi watershed, enters the Traverse Gap from the west (right) and flows south to Big Stone Lake, is flooding the gap and Browns Valley (center); at the lower right floodwaters are crossing the continental divide into Lake Traverse in the watershed of Hudson Bay.