Portal, Montana

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.

• 1889 USGS Helena quadrangle1:250000
• 1893 USGS Helena quadrangle1:250000, 2 printings
• 1899 USGS Boulder quadrangle1:125000, 4 printings
• 1899 USGS Helena quadrangle1:250000
• 1903 USGS Helena quadrangle1:250000, 4 printings
• 1947 USGS Butte quadrangle1:250000, 2 printings
• 1950 USGS Jefferson City quadrangle1:62500, 5 printings
• 1958 USGS Butte quadrangle1:250000, 5 printings
• 1960 USGS Butte quadrangle1:250000
• 1962 USGS Butte quadrangle1:250000
• 1985 USGS Wickes quadrangle1:24000
• 1994 USGS Butte North quadrangle1:100000
• 1996 USGS Wickes quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 40 fires within 5 miles of Portal between 1994 and 2020, burning about 12,501 acres in total. 22 started naturally. None 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:

• Amazon
• Wickes
• Corbin
• Glenbeg (historical)
• Comet
• Jefferson City

Every fire recorded in Jefferson County

Regional context, not property-specific evidence. The federal mineral resources record lists 205 workings within 5 miles of Portal: 103 past producers, 37 prospects, 28 occurrences, 22 unknowns. 15 still produce. What was taken out: Gold, Silver, Lead, Lead, 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 Jefferson 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 789116. 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.