Clarkson Valley, Missouri

Clarkson Valley fell from 2,632 to 2,609 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.

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.

• 1903 USGS O'Fallon quadrangle1:125000, 5 printings
• 1931 USGS Manchester SE quadrangle1:24000
• 1945 USGS Manchester quadrangle1:24000
• 1947 USGS Manchester quadrangle1:24000, 2 printings
• 1949 USGS Saint Louis quadrangle1:250000
• 1949 USGS St. Louis quadrangle1:250000
• 1954 USGS Manchester quadrangle1:24000, 8 printings
• 1962 USGS St. Louis quadrangle1:250000
• 1963 USGS St. Louis quadrangle1:250000, 4 printings
• 1966 USGS St. Louis quadrangle1:250000
• 1979 USGS Manchester quadrangle1:24000
• 1985 USGS St Louis quadrangle1:100000, 3 printings

Regional context, not property-specific evidence. The federal mineral resources record lists 8 workings within 5 miles of Clarkson Valley: 8 past producers. None of them still produces. What was taken out: Stone, Crushed/Broken, Clay, Fire Clay (Refractory). 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. Louis County

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

Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.

This settlement is recorded in the Geographic Names Information System as feature 755895. 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.