Irwin, 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.

• 1888 USGS Anthracite quadrangle1:62500
• 1889 USGS Anthracite quadrangle1:62500
• 1893 USGS Anthracite quadrangle1:62500, 9 printings
• 1894 USGS Anthracite quadrangle1:62500
• 1956 USGS Montrose quadrangle1:250000, 3 printings
• 1959 USGS Montrose quadrangle1:250000
• 1960 USGS Montrose quadrangle1:250000, 2 printings
• 1961 USGS Mount Axtell quadrangle1:24000, 4 printings
• 1968 USGS Montrose quadrangle1:250000
• 1983 USGS Paonia quadrangle1:100000, 2 printings
• 2001 USGS Mount Axtell quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 15 fires within 5 miles of Irwin between 1994 and 2020, burning about 4 acres in total. 5 started naturally. 1 was 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:

• Ruby
• Floresta
• Crested Butte
• Elkton
• Mount Crested Butte
• Pittsburg

Every fire recorded in Gunnison County

Regional context, not property-specific evidence. The federal mineral resources record lists 55 workings within 5 miles of Irwin: 17 unknowns, 15 past producers, 13 occurrences, 10 producers. 10 still produce. What was taken out: Gold, Lead, Lead, Silver, Zinc, Silver. 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 Gunnison 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 203227. 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.