Hansen Bridge

Built in 1935. Listed on the National Register of Historic Places in 2012. 11 historic topographic surveys show this location, the earliest from 1891.

From the record

One of 10 National Register listings published here for Sierra County · listed in 2012 · category: Structure · built in 1935.

Sources: the case file at the National Archives · the National Register database, National Park Service

The listing

What is counted as historic. The nomination lists 1 structure as contributing to the listing.
Address. E. River St. between Upper Main & Pearl Sts., Downieville, 95936
When was it listed? July 2012
Category. structure
Also known as. Highway Bridges of California MPS
Census division. West Sierra
When was it built? 1935
National Register reference number. 12000399 - the number the National Park Service assigned this property when it was listed, and the key its nomination file is catalogued under at the National Archives.

Then and now

1891 to 2000

The ground this property stands on, surveyed 109 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

Topographic sheet covering Hansen Bridge, surveyed 2000

Topographic sheet covering Hansen Bridge, surveyed 1891

Fires near this property

47 since 1992

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 47 fires within 5 miles of Hansen Bridge between 1992 and 2018, burning about 266 acres in total. 24 started naturally. None 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.

Reported cause	Fires
Natural	24
Debris and open burning	6
Recreation and ceremony	6
Missing data/not specified/undetermined	5
Equipment and vehicle use	3
Power generation/transmission/distribution	1
Smoking	1
Other causes	1

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Date	Cause	Size	Reported by	Name on the report
6 September 2017	Natural	under an acre	Tahoe National Forest	SLATE
24 September 2001	Natural	2.0 acres	Tahoe National Forest	FIR
17 September 1996	Natural	under an acre	Tahoe National Forest	GRIZZLY
16 September 1996	Natural	under an acre	Tahoe National Forest	YUBA
14 September 2011	Natural	under an acre	Tahoe National Forest	GALLOWAY
12 September 2017	Natural	under an acre	Tahoe National Forest	CASTLE
11 September 2005	Natural	under an acre	Tahoe National Forest	COMMISSION
8 August 1992	Recreation and ceremony	under an acre	Tahoe National Forest	GALLOWAY

Every fire recorded in Sierra County

Mines and quarries near this property

10 of 257 shown

Regional context, not property-specific evidence. The federal mineral resources record lists 257 workings within 5 miles of Hansen Bridge: 112 past producers, 64 occurrences, 46 producers, 18 unknowns. 46 still produce. What was taken out: Gold, Silver, Chromium, Lead. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Site	Commodity	Status	Recorded
Comet Mine	Gold, Copper	Past Producer	Gold
Gold Point	Gold, Silver, Copper, Lead, Zinc	Past Producer	Gold, Silver
Gold Point	Gold, Lead, Silver	Past Producer
North Fork Mine	Gold, Lead	Past Producer	Galena, Gold, Pyrite
Occurrence	Stone, Crushed/Broken	Occurrence
Oxford Mine	Chromium, Iron	Past Producer	1918
Reported Occurrence	Antimony	Occurrence
Secret Canyon	Gold, Manganese	Past Producer	Gold
W W Casserely	Asbestos	Prospect
Casserly	Chromium	Prospect

Every working recorded in Sierra County

Storms near this property

1 since 2021

Regional context, not property-specific evidence. The National Weather Service names Downieville, the town this property stands in, in 1 storm report in 2021: 1 heavy rain. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.

When	Event	Place named	Harm	What the report says
October 2021	Heavy Rain	Downieville	-	Heavy rain was reported in Sierra County. Reported storm totals reached 6.88 inches near Saddleback to 11.28 inches in Downieville.

Every storm recorded in Sierra County

Maps showing this location

11 surveys

United States Geological Survey topographic sheets whose coverage includes this point. Matched by taking the coordinate the National Park Service records for this property, then testing that coordinate against the published boundary of every sheet.

1891 USGS Downieville quadrangle1:125000
1893 USGS Downieville quadrangle1:125000
1895 USGS Downieville quadrangle1:125000
1896 USGS Downieville quadrangle1:125000
1897 USGS Downieville quadrangle1:125000 - 7 printings
1951 USGS Downieville quadrangle1:62500 - 3 printings
1951 USGS Downieville quadrangle1:24000 - 6 printings
1958 USGS Chico quadrangle1:250000 - 4 printings
1960 USGS Chico quadrangle1:250000
1979 USGS Portola quadrangle1:100000 - 2 printings
2000 USGS Downieville quadrangle1:24000

Listed places nearby

5 within 8 miles

Other National Register properties close enough to walk or drive between, ordered by distance from this one. Both positions come from the same geocoding pass that matched these properties to their map sheets.

Property	Distance	Listed
Jersey Bridge	0.3 miles	2012
Durgan Bridge	0.3 miles	2012
Sierra County Sheriff's Gallows	0.5 miles	1990
Hospital Bridge	0.5 miles	2012
Forest City	5.3 miles	1996

Sources for this property

National Archives record	The nomination case file for reference 12000399 in Record Group 79.
Sierra County	All 10 listed properties in this county.

Provenance

Listing record. National Park Service National Register of Historic Places, listed-properties dataset, current to 2026-05-22.
Map join. Address geocoded through the United States Census geocoder, then tested against the published boundary of every sheet in the USGS Historical Topographic Map Collection.
How this page is made. Listing fields come from federal records; map-sheet coverage is a labelled coordinate-to-boundary calculation, not a source-field claim.
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.
Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.