Sibert Reservoir
Lake in Webster County, Nebraska · on the USGS Red Cloud quadrangle
40.05175, -98.61946
Maps that show Sibert Reservoir
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Red Cloud, NE-KS
USGS topo, 2021

Red Cloud, NE
USGS historical 15-minute topo (1940)

Red Cloud, NE
USGS historical 15-minute topo (1942)

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

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

IFR Enroute High Altitude Chart H-05 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).