Oro Blanco, 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.

• 1921 USGS Old Glory quadrangle1:125000, 2 printings
• 1942 USGS Oro Blanco quadrangle1:62500, 3 printings
• 1943 USGS Old Glory quadrangle1:125000
• 1944 USGS Oro Blanco quadrangle1:62500, 2 printings
• 1956 USGS Nogales quadrangle1:250000, 4 printings
• 1958 USGS Nogales quadrangle1:250000
• 1959 USGS Nogales quadrangle1:250000
• 1979 USGS Bartlett Mtn quadrangle1:24000, 4 printings
• 1994 USGS Atascosa Mountains quadrangle1:100000, 2 printings
• 2004 USGS Bartlett Mountain quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 74 fires within 5 miles of Oro Blanco between 1993 and 2020, burning about 12,664 acres in total. 20 started naturally. 3 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:

• Partridge (historical)
• Old Glory
• Ruby
• Casa Piedra

Every fire recorded in Santa Cruz County

Regional context, not property-specific evidence. The federal mineral resources record lists 84 workings within 5 miles of Oro Blanco: 55 past producers, 19 prospects, 5 occurrences, 4 producers. 5 still produce. What was taken out: Gold, Silver, Copper, Lead, Zinc, Gold, Copper. 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 Santa Cruz 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 36757. 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.