
The county seat of Primghar serves as the central hub for this portion of O'Brien County during the mid-1960s, anchoring a landscape shaped by a grid of rural section lines and a network of prairie waterways. To the northwest, the small settlement of Archer sits along the Illinois Central railroad, which cuts a sharp east-west line across the upper half of the quadrangle. The terrain is defined by the gentle drainage of Mill Creek and its tributaries, including West Branch Mill Creek, Johnson Creek, and Mud Creek. Local history is preserved at sites like Pleasant Hill Cem and St Anthonys Cem, located just west of the Primghar town limits. The map reveals the local economy through numerous scattered Gravel Pits and the clearly defined boundaries of Summit, Carroll, Baker, and Dale townships.
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This is the sole edition of this map. No revisions or reprints were ever made.
1954 · Fairmont
USGS Topo · 1:250,000
1954 · Fort Dodge
USGS Topo · 1:250,000
1957 · Fort Dodge
USGS Topo · 1:250,000
1958 · Fort Dodge
USGS Topo · 1:250,000
1958 · Fairmont
USGS Topo · 1:250,000
1964 · Sheldon SE
USGS Topo · 1:24,000
1964 · Sheldon
USGS Topo · 1:24,000
1964 · Plessis
USGS Topo · 1:24,000
1964 · Gaza
USGS Topo · 1:24,000
1964 · Sanborn
USGS Topo · 1:24,000