Rock Valley serves as the central hub of this Sioux County landscape, situated along a prominent bend of the Rock River. The settlement's residential grid is well-defined by a system of numbered streets and avenues, including 10th St and 20th Ave, while the surrounding rural acreage is organized by a meticulous section line road network. Local heritage is anchored by sites like Valley View Cem and Saint Mary's Cem, located just south of the main town center. The hydrology of the area is defined by the winding course of the Rock River, which is joined by several tributaries such as Dry Run Cr and Rogg Cr. This 2015 survey reflects a classic Midwestern agricultural pattern where traditional township boundaries like t97n r46w intersect with modern infrastructure.
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1955 · Sioux Falls
USGS Topo · 1:250,000
1958 · Sioux Falls
USGS Topo · 1:250,000
1964 · Sioux Center
USGS Topo · 1:24,000
1964 · Hull
USGS Topo · 1:24,000
1968 · Hawarden North
USGS Topo · 1:24,000
1968 · Fairview
USGS Topo · 1:24,000
1968 · Labanon
USGS Topo · 1:24,000
1968 · Rock Valley
USGS Topo · 1:24,000
1971 · Inwood
USGS Topo · 1:24,000
1971 · Doon
USGS Topo · 1:24,000