Ridgewood, California

The same ground, surveyed 101 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1891 1992

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.

• 1891 USGS Truckee quadrangle1:125000
• 1893 USGS Truckee quadrangle1:125000
• 1895 USGS Truckee quadrangle1:125000, 9 printings
• 1932 USGS Truckee quadrangle1:96000
• 1940 USGS Truckee quadrangle1:125000, 4 printings
• 1955 USGS Kings Beach quadrangle1:24000, 4 printings
• 1955 USGS Tahoe quadrangle1:62500, 3 printings
• 1958 USGS Chico quadrangle1:250000, 4 printings
• 1960 USGS Chico quadrangle1:250000
• 1977 USGS Truckee quadrangle1:100000, 2 printings
• 1992 USGS Kings Beach quadrangle1:24000, 2 printings

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 311 fires within 5 miles of Ridgewood between 1992 and 2020, burning about 436 acres in total. 22 started naturally. 5 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:

• Carnelian Bay
• Cedar Flat
• Tahoe Marina Estates
• Carnelian Heights
• Kingswood Estates
• Tahoe Estates

Every fire recorded in Placer County

Regional context, not property-specific evidence. The federal mineral resources record lists 1 working within 5 miles of Ridgewood: 1 prospect. None of them still produces. What was taken out: 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 Placer 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 1723455. 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.