Silverdale, Indiana

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.

• 1901 USGS Owensboro quadrangle1:62500, 5 printings
• 1952 USGS Rockport quadrangle1:24000, 2 printings
• 1954 USGS Evansville quadrangle1:250000
• 1957 USGS Evansville quadrangle1:250000, 3 printings
• 1961 USGS Evansville quadrangle1:250000, 2 printings
• 1964 USGS Rockport quadrangle1:24000, 2 printings
• 1986 USGS Evansville quadrangle1:100000
• 1991 USGS Evansville quadrangle1:100000

Regional context, not property-specific evidence. The federal mineral resources record lists 1 working within 5 miles of Silverdale: 1 producer. All of them still produce. 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 Spencer 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 443516. 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.