Duffield, Colorado

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.

• 1893 USGS Colorado Springs quadrangle1:125000, 2 printings
• 1909 USGS Colorado Springs quadrangle1:125000, 5 printings
• 1942 USGS Colorado Springs quadrangle1:125000
• 1948 USGS Mount Big Chief quadrangle1:24000, 2 printings
• 1948 USGS Mount Big Chief quadrangle1:62500, 2 printings
• 1949 USGS Mount Big Chief quadrangle1:24000
• 1951 USGS Mount Big Chief quadrangle1:62500, 2 printings
• 1954 USGS Pueblo quadrangle1:250000, 3 printings
• 1957 USGS Pueblo quadrangle1:250000
• 1958 USGS Pueblo quadrangle1:250000
• 1961 USGS Mount Big Chief quadrangle1:24000, 6 printings
• 1962 USGS Pueblo quadrangle1:250000
• 1966 USGS Pueblo quadrangle1:250000
• 1981 USGS Colorado Springs quadrangle1:100000, 2 printings
• 1989 USGS Pueblo quadrangle1:250000
• 1994 USGS Mount Big Chief quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 157 fires within 5 miles of Duffield between 1992 and 2020, burning about 62 acres in total. 24 started naturally. 7 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:

• Green Settlement
• Broadmoor
• Colorado Springs
• Ivywild
• Manitou Springs
• Midway

Every fire recorded in El Paso County

Regional context, not property-specific evidence. The federal mineral resources record lists 51 workings within 5 miles of Duffield: 21 past producers, 15 occurrences, 8 producers, 5 unknowns. 8 still produce. What was taken out: Fluorine-Fluorite, Uranium, Tungsten, Gold. 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 El Paso 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 193597. 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.