
Lake Francis Case dominates the southwestern corner of this landscape, its waters contained by the rugged bluffs of the Missouri River valley. The terrain here transitions sharply from the high, flat prairie of the northern plains into the deeply eroded breaks and coulees that lead down to the reservoir. While the settlement of Chamberlain is visible along the northern edge of the sheet, much of the surrounding area is defined by the grid of rural township roads and agricultural sections characteristic of the central South Dakota plateau. The map captures the topography of this river corridor in detail, highlighting the contrast between the stabilized water level of the artificial lake and the ancient, dissected landforms of the Brule County shoreline.
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This is the sole edition of this map. No revisions or reprints were ever made.
1935 · Chamberlain
USGS Topo · 1:62,500
1939 · Chamberlain
USGS Topo · 1:62,500
1940 · Iona
USGS Topo · 1:62,500
1941 · Pukwana
USGS Topo · 1:62,500
1944 · Iona
USGS Topo · 1:62,500
1951 · Pukwana
USGS Topo · 1:62,500
1952 · Oacoma
USGS Topo · 1:24,000
1952 · Iona NW
USGS Topo · 1:24,000
1955 · Mitchell
USGS Topo · 1:250,000
1959 · Mitchell
USGS Topo · 1:250,000