Ponderosa Basin, California

The same ground, surveyed 92 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1912 2004

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.

• 1912 USGS Mariposa quadrangle1:125000, 6 printings
• 1947 USGS Mariposa quadrangle1:250000, 2 printings
• 1948 USGS Mariposa quadrangle1:250000
• 1953 USGS Bass Lake quadrangle1:62500, 4 printings
• 1957 USGS Mariposa quadrangle1:250000, 4 printings
• 1963 USGS Mariposa quadrangle1:250000
• 1980 USGS Shaver Lake quadrangle1:100000, 3 printings
• 1990 USGS Fish Camp quadrangle1:24000
• 2004 USGS Fish Camp quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 220 fires within 5 miles of Ponderosa Basin between 1992 and 2020, burning about 15,526 acres in total. 35 started naturally. 14 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:

• Elliott Corner
• Fish Camp
• Catheys Valley
• Darrah
• Indian Gulch
• Wawona

Every fire recorded in Mariposa County

Regional context, not property-specific evidence. The federal mineral resources record lists 5 workings within 5 miles of Ponderosa Basin: 2 past producers, 1 unknown, 1 producer, 1 occurrence. 1 still produces. What was taken out: Tungsten, Gold, Uranium. 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 Mariposa County

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.

This settlement is recorded in the Geographic Names Information System as feature 1809330. 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.