Boyer River, Iowa

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

• 1954 USGS Fort Dodge quadrangle1:250000, 3 printings
• 1957 USGS Fort Dodge quadrangle1:250000
• 1958 USGS Fort Dodge quadrangle1:250000
• 1980 USGS Boyer quadrangle1:24000
• 1985 USGS Ida Grove quadrangle1:100000, 2 printings

Regional context, not property-specific evidence. The federal mineral resources record lists 3 workings within 5 miles of Boyer River: 2 unknowns, 1 past producer. None of them still produces. What was taken out: Sand and Gravel, Construction. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Every working recorded in Crawford County

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

This settlement is recorded in the Geographic Names Information System as feature 454792. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.