Polvo, Arizona

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.

• 1904 USGS Tucson quadrangle1:125000
• 1905 USGS Tucson quadrangle1:125000, 5 printings
• 1948 USGS Tucson quadrangle1:62500
• 1956 USGS Tucson quadrangle1:250000, 3 printings
• 1957 USGS Tucson quadrangle1:24000, 3 printings
• 1957 USGS Tucson quadrangle1:62500, 2 printings
• 1958 USGS Tucson quadrangle1:250000
• 1959 USGS Tucson quadrangle1:250000, 2 printings
• 1962 USGS Tucson quadrangle1:250000
• 1964 USGS Tucson quadrangle1:250000
• 1983 USGS Tucson quadrangle1:24000
• 1992 USGS Tucson quadrangle1:24000
• 1994 USGS Tucson quadrangle1:100000, 2 printings
• 1996 USGS Tucson quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 1,896 fires within 5 miles of Polvo between 1994 and 2020, burning about 287 acres in total. 48 started naturally. 40 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Settlements close enough to share some of these fires:

• Pueblo Gardens
• Vandenberg Village
• Tucson
• Craycroft
• South Tucson
• Kingston Knolls Terrace

Every fire recorded in Pima County

Regional context, not property-specific evidence. The federal mineral resources record lists 9 workings within 5 miles of Polvo: 3 occurrences, 3 past producers, 2 producers, 1 unknown. 2 still produce. What was taken out: Geothermal, Sand and Gravel, Construction, Stone, Crushed/Broken, Clay. 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 Pima 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 9630. 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.

Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.

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.