Black Walnut, Missouri

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.

• 1927 USGS St. Charles quadrangle1:62500, 2 printings
• 1933 USGS Saint Charles quadrangle1:62500
• 1933 USGS St. Charles quadrangle1:62500, 2 printings
• 1935 USGS Florissant quadrangle1:24000
• 1949 USGS Saint Louis quadrangle1:250000
• 1949 USGS St. Louis quadrangle1:250000
• 1954 USGS Florissant quadrangle1:24000, 5 printings
• 1954 USGS St. Charles quadrangle1:62500, 2 printings
• 1962 USGS St. Louis quadrangle1:250000
• 1963 USGS St. Louis quadrangle1:250000, 4 printings
• 1966 USGS St. Louis quadrangle1:250000
• 1985 USGS St Louis quadrangle1:100000, 3 printings
• 1994 USGS Florissant quadrangle1:24000
• 1998 USGS Florissant quadrangle1:24000

Regional context, not property-specific evidence. The federal mineral resources record lists 1 working within 5 miles of Black Walnut: 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 St. Charles 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 755780. 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.