The Shell Rock River snakes through this northern Iowa landscape, serving as a primary corridor for the riverside communities of Rock Falls and Nora Springs. The topography is defined by the river’s winding course and its tributaries, including Rock Falls Cr and Little Lime Cr. In Nora Springs, the Hawkeye Street Underpass and the nearby rail convergence at Nora Junction highlight the area's legacy as a transportation hub, where steel and stone meet the water.
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This is the sole edition of this map. No revisions or reprints were ever made.
1954 · Mason City
USGS Topo · 1:250,000
1957 · Mason City
USGS Topo · 1:250,000
1958 · Mason City
USGS Topo · 1:250,000
1959 · Mason City
USGS Topo · 1:24,000
1959 · Mason City
USGS Topo · 1:62,500
1959 · Nora Springs
USGS Topo · 1:24,000
1959 · Mason City SE
USGS Topo · 1:24,000
1959 · Hanford
USGS Topo · 1:24,000
1971 · Rockford
USGS Topo · 1:24,000
1971 · Rudd
USGS Topo · 1:24,000