West Coteau Lake (historical)
Lake in Deuel County, South Dakota · on the USGS Rosholt quadrangle
45.83468, -96.73507
Maps that show West Coteau Lake (historical)
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Rosholt, SD-MN
USGS topo, 2021

White Rock, SD
USGS historical 15-minute topo (1915)

White Rock, SD
USGS historical 15-minute topo (1918)

Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)

IFR Enroute Low Altitude Chart L-14 (U.S.)
FAA, 2026-10-29

IFR Enroute High Altitude Chart H-02 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).