Ada marks the northwestern edge of this agricultural region in Norman County, where the landscape is defined by the winding course of the Wild Rice River. The river's serpentine path through the center of the sheet is joined by the Marsh River, while various wetlands like Gilbertson Slough and Little Gilbertsons Slough reflect the low-lying prairie terrain. Human intervention in the hydrology is evident through large-scale drainage projects, including Judicial Ditch Number Fifty-one and State Ditch Number Sixty-eight.
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This is the sole edition of this map. No revisions or reprints were ever made.
1918 · Twin Valley
USGS Topo · 1:62,500
1918 · Ulen
USGS Topo · 1:62,500
1924 · Ada
USGS Topo · 1:62,500
1952 · Grand Forks
USGS Topo · 1:250,000
1956 · Grand Forks
USGS Topo · 1:250,000
1965 · Lockhart
USGS Topo · 1:24,000
1965 · Twin Valley SW
USGS Topo · 1:24,000
1965 · Twin Valley
USGS Topo · 1:24,000
1965 · Syre
USGS Topo · 1:24,000
1965 · Twin Valley NW
USGS Topo · 1:24,000