Built in 1942. Listed on the National Register of Historic Places in 1978. 10 historic topographic surveys show this location, the earliest from 1929.
From the record
“The B-71 radar station also known as Klamath River Radar Station, Crescent City Radar Station, and Trinidad Radar Station, was an Army Air Force early warning station in World War II. It is a rare survivor of a World War II early-warning radar station.”
Wikipedia article Radar Station B-71, CC BY-SA 4.0.
One of 6 National Register listings published here for Del Norte County · listed in 1978 · category: Building · built in 1942.
National Register reference number.78000282- 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
1929 to 1997
The ground this property stands on, surveyed
68 years apart. Drag the handle to wipe between them. Both sheets are
United States Geological Survey originals; neither has been altered.
19291997
Fires near this property
153 since 1992
Regional context, not property-specific
evidence. The
federal wildfire occurrence database
lists 153 fires within 5 miles of Radar Station B-71
between 1992 and 2019, burning about 118 acres in total. 10 started naturally. 30 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.
Reported cause
Fires
Missing data/not specified/undetermined
40
Arson/incendiarism
30
Equipment and vehicle use
26
Recreation and ceremony
18
Debris and open burning
13
Misuse of fire by a minor
13
Natural
10
Smoking
2
Power generation/transmission/distribution
1
The most recent of
them, most recent first, with the day each was reported and the service
that recorded it.
Regional context, not property-specific
evidence. The federal mineral resources record lists
7 workings within 5 miles of Radar Station B-71: 4 producers, 3 occurrences.
4 still produce. What was taken out: Gold, 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.
Regional context, not property-specific
evidence. The National Weather Service names
Klamath, the town this property stands in, in 2 storm reports between 2008 and 2024: 1 flood, 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.
Heavy rain caused debris laden flow to block the culvert of a small stream near Klamath. The resultant flooding closed several roads in the area and inundated one commercial building.
United States Geological Survey topographic
sheets whose coverage includes this point. Matched by taking the middle of the area the National Park Service maps for this listing, then
testing that coordinate against the published boundary of every sheet.
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.
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.
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