Sulphur Springs, 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.

1903 1995

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.

• 1903 USGS Santa Paula quadrangle1:62500, 6 printings
• 1942 USGS Santa Paula quadrangle1:62500
• 1947 USGS Santa Paula quadrangle1:62500
• 1949 USGS Los Angeles quadrangle1:250000, 2 printings
• 1951 USGS Santa Paula Peak quadrangle1:24000, 6 printings
• 1955 USGS Los Angeles quadrangle1:250000
• 1959 USGS Los Angeles quadrangle1:250000, 3 printings
• 1964 USGS Santa Paula quadrangle1:62500
• 1966 USGS Los Angeles quadrangle1:250000
• 1975 USGS Los Angeles quadrangle1:250000, 2 printings
• 1982 USGS Santa Barbara quadrangle1:100000, 3 printings
• 1995 USGS Santa Paula Peak quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 23 fires within 5 miles of Sulphur Springs between 1993 and 2017, burning about 286,590 acres in total. None started naturally. 2 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:

• Camp Bartlett
• Howell Place
• Teagueville (historical)
• Kevet
• Santa Paula

Every fire recorded in Ventura County

Regional context, not property-specific evidence. The federal mineral resources record lists 4 workings within 5 miles of Sulphur Springs: 2 occurrences, 1 unknown, 1 past producer. None of them still produces. What was taken out: Gypsum-Anhydrite, Boron-Borates, Clay, Geothermal. 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 Ventura 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 1661521. 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.