Boulder Bay, California

The same ground, surveyed 95 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1901 1996

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.

• 1901 USGS Southern California Sheet No. 1 quadrangle1:250000, 6 printings
• 1902 USGS San Gorgonio quadrangle1:125000, 8 printings
• 1904 USGS Southern California Sheet No. 1 quadrangle1:250000, 2 printings
• 1953 USGS San Bernardino quadrangle1:250000, 2 printings
• 1954 USGS San Gorgonio Mountain quadrangle1:62500, 5 printings
• 1956 USGS San Bernardino quadrangle1:250000
• 1957 USGS San Bernardino quadrangle1:250000
• 1958 USGS San Bernardino quadrangle1:250000
• 1959 USGS San Bernardino quadrangle1:250000
• 1966 USGS San Bernardino quadrangle1:250000
• 1970 USGS Big Bear Lake quadrangle1:24000, 6 printings
• 1982 USGS Big Bear Lake quadrangle1:100000
• 1996 USGS Big Bear Lake quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 334 fires within 5 miles of Boulder Bay between 1992 and 2020, burning about 14,818 acres in total. 103 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:

• Fawnskin
• Big Bear Lake
• Minnelusa
• Seven Oaks
• The Pines (historical)
• Big Bear City

Every fire recorded in San Bernardino County

Regional context, not property-specific evidence. The federal mineral resources record lists 26 workings within 5 miles of Boulder Bay: 12 past producers, 7 occurrences, 5 unknowns, 2 prospects. None of them still produces. What was taken out: Gold, Uranium, Sand and Gravel, Construction, 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 San Bernardino 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 269979. 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.