Manson serves as the primary hub of this agricultural landscape in Calhoun County, characterized by a grid of rural roads and scattered historical landmarks. The township's heritage is preserved at the Wiegert Prairie Farmstead and the nearby Wiegert Prairie, offering a look at the region's natural state before the extensive drainage required for modern farming. A complex network of waterways, including the South Branch Lizard Creek and the engineered Drainage Ditch Number 47, illustrates the transition from prairie to highly productive farmland.
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1954 · Fort Dodge
USGS Topo · 1:250,000
1957 · Fort Dodge
USGS Topo · 1:250,000
1958 · Fort Dodge
USGS Topo · 1:250,000
1965 · Knierim
USGS Topo · 1:24,000
1979 · Pocahontas
USGS Topo · 1:24,000
1979 · Gilmore City SW
USGS Topo · 1:24,000
1979 · Manson
USGS Topo · 1:24,000
1979 · Pomeroy
USGS Topo · 1:24,000
1979 · Gilmore City
USGS Topo · 1:24,000
1979 · Palmer
USGS Topo · 1:24,000