Marconi, California

The same ground, surveyed 79 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1916 1995

Buildings and businesses the archive holds for this place. Each opens its own page, with the source record it came from.

On the National Register within a mile 2 records

The National Register names another town for these. They stand within one mile of this settlement's coordinate.

• Station KPH Operating Stationlisted 1989 · 0.0 miles away
• Station KPH, Marconi Wireless Telegraph Company of Americalisted 2025 · 0.0 miles away

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.

• 1916 USGS Point Reyes quadrangle1:48000
• 1916 USGS Point Reyes quadrangle1:62500
• 1918 USGS Point Reyes quadrangle1:62500, 6 printings
• 1947 USGS Santa Rosa quadrangle1:250000
• 1949 USGS Santa Rosa quadrangle1:250000, 2 printings
• 1954 USGS Point Reyes quadrangle1:62500, 5 printings
• 1954 USGS Tomales quadrangle1:24000, 6 printings
• 1958 USGS Santa Rosa quadrangle1:250000, 3 printings
• 1962 USGS Santa Rosa quadrangle1:250000
• 1964 USGS Santa Rosa quadrangle1:250000
• 1983 USGS Napa quadrangle1:100000
• 1995 USGS Tomales quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 24 fires within 5 miles of Marconi between 1995 and 2020, burning about 12,362 acres in total. 1 started naturally. 1 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:

• Reynolds
• Sacramento Landing
• Cypress Grove
• Lairds Landing
• Marshall
• Point Reyes (historical)

Every fire recorded in Marin County

Regional context, not property-specific evidence. The federal mineral resources record lists 9 workings within 5 miles of Marconi: 5 occurrences, 2 prospects, 1 past producer, 1 producer. 1 still produces. What was taken out: Stone, Crushed/Broken, Tungsten, Sand and Gravel, Construction, Stone. 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 Marin 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 1659056. 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.