The town of Sedgwick serves as the central hub for this northeast Colorado agricultural landscape, situated along the southern bank of the South Platte River. The river corridor is heavily modified by a network of irrigation systems essential to local farming, including the Peterson Ditch, Settlers Ditch, and the Highline Canal. These waterworks parallel the river's path through the valley, supporting the township structure of T11N R46W and R47W. Beyond the river bottom, the terrain rises into high plains dissected by prominent natural drainages like Sedgwick Draw and Sand Draw.
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1899 · Sidney
USGS Topo · 1:125,000
1900 · Chappell
USGS Topo · 1:125,000
1952 · Julesburg SW
USGS Topo · 1:24,000
1952 · Marks Butte
USGS Topo · 1:24,000
1953 · Ovid
USGS Topo · 1:24,000
1953 · Tamarack Ranch
USGS Topo · 1:24,000
1953 · Julesburg Reservoir
USGS Topo · 1:24,000
1953 · Sedgwick
USGS Topo · 1:24,000
1954 · Sterling
USGS Topo · 1:250,000
1954 · Scottsbluff
USGS Topo · 1:250,000