Alto, Washington

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.

• 1919 USGS Walla Walla quadrangle1:125000
• 1921 USGS Walla Walla quadrangle1:125000, 2 printings
• 1953 USGS Walla Walla quadrangle1:250000, 3 printings
• 1958 USGS Walla Walla quadrangle1:250000
• 1967 USGS Kellogg Creek quadrangle1:24000
• 1980 USGS Walla Walla quadrangle1:100000, 2 printings

Regional context, not property-specific evidence. The federal mineral resources record lists 4 workings within 5 miles of Alto: 4 past producers. None of them still produces. What was taken out: Sand and Gravel, Construction, Stone, Crushed/Broken. 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 Columbia 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 1510781. 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.