Oswalds Bay
Swamp in Benson County, North Dakota · on the USGS Grahams Island quadrangle
48.09667, -99.11238
Maps that show Oswalds Bay
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Grahams Island, ND
USGS topo, 2024
Grahams Island, ND
USGS historical 15-minute topo (1932)
Grahams Island, ND
USGS historical 15-minute topo (1950)
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).