Spotswood House

Listed on the National Register of Historic Places in 2007. 7 historic topographic surveys show this location, the earliest from 1943.

From the record

One of 42 National Register listings published here for Mendocino County · listed in 2007 · category: Building.

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 building as contributing to the listing.
Address. 11820 West Rd., Potter Valley, 95469
When was it listed? September 2007
Category. building
Census division. Redwood Valley-Potter Valley
National Register reference number. 07000997 - 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

1943 to 1996

The ground this property stands on, surveyed 53 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

Topographic sheet covering Spotswood House, surveyed 1996

Topographic sheet covering Spotswood House, surveyed 1943

Fires near this property

86 since 1992

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 86 fires within 5 miles of Spotswood House between 1992 and 2020, burning about 1,452 acres in total. 2 started naturally. 6 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	28
Equipment and vehicle use	22
Debris and open burning	18
Misuse of fire by a minor	7
Arson/incendiarism	6
Natural	2
Fireworks	1
Power generation/transmission/distribution	1
Smoking	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
9 September 2007	Missing data/not specified/undetermined	1.0 acres	Northern California District	UNNAMED FIRE 3669
8 September 1997	Equipment and vehicle use	1.0 acres	Mendocino Unit	WEIR
6 September 2020	Missing data/not specified/undetermined	under an acre	Mendocino Unit	GIBSON
30 September 2008	Equipment and vehicle use	1.0 acres	Mendocino Unit	not named
29 September 1995	Missing data/not specified/undetermined	under an acre	Mendocino Unit	HAWN
27 September 2005	Natural	under an acre	Mendocino Unit	VAN ARSDALE
26 September 2005	Natural	under an acre	Mendocino Unit	POWERHOUSE
2 September 2006	Equipment and vehicle use	2.0 acres	Mendocino Unit	POTTER

Every fire recorded in Mendocino County

Mines and quarries near this property

10 of 31 shown

Regional context, not property-specific evidence. The federal mineral resources record lists 31 workings within 5 miles of Spotswood House: 10 occurrences, 9 producers, 7 past producers, 4 prospects. 9 still produce. What was taken out: Manganese, Stone, Manganese, Silica, Silica, Manganese. 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
Oberfeld Shale Quarry	Stone, Crushed/Broken	Producer
South Thomas	Silica, Manganese	Past Producer	1915, 1916
Mendocino Co. No.136	Manganese, Silica	Past Producer
Thomas Mine	Manganese, Silica	Past Producer	1912, 1914
Unknown	Stone	Occurrence
Unnamed Location	Stone	Occurrence
Bevins-Busch	Manganese	Producer	Psilomelane, Pyrolusite
Bevins-Busch Claim	Manganese	Past Producer	1917
Faucher	Manganese	Producer	Psilomelane
Faucher Mine	Manganese	Prospect	1918

Every working recorded in Mendocino County

Maps showing this location

7 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.

1943 USGS Pomo quadrangle1:62500
1957 USGS Ukiah quadrangle1:250000 - 3 printings
1960 USGS Potter Valley quadrangle1:62500 - 2 printings
1960 USGS Potter Valley quadrangle1:24000 - 2 printings
1960 USGS Ukiah quadrangle1:250000 - 2 printings
1981 USGS Ukiah quadrangle1:100000 - 3 printings
1996 USGS Potter Valley quadrangle1:24000

Sources for this property

National Archives record	The nomination case file for reference 07000997 in Record Group 79.
Mendocino County	All 42 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.