BlockFrom the record
One of 160 National Register listings published here for Alameda County · listed in 1978 · category: Building · built in 1878.
Sources: the case file at the National Archives · the National Register database, National Park Service
Wetmore House
Built in 1878. Listed on the National Register of Historic Places in 1978. 20 historic topographic surveys show this location, the earliest from 1897.
The listing
- What is counted as historic. The nomination lists 1 building as contributing to the listing.
- Address. 342 Bonita Ave., Piedmont, 94611
- When was it listed? April 1978
- Category. building
- Census division. Oakland
- When was it built? 1878
- National Register reference number. 78000653 - 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
1897 to 1997The ground this property stands on, surveyed 100 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.
Fires near this property
296 since 1992Regional context, not property-specific evidence. The federal wildfire occurrence database lists 296 fires within 5 miles of Wetmore House between 1992 and 2020, burning about 417 acres in total. None started naturally. 31 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 | 209 |
| Arson/incendiarism | 31 |
| Smoking | 17 |
| Equipment and vehicle use | 15 |
| Misuse of fire by a minor | 14 |
| Debris and open burning | 6 |
| Power generation/transmission/distribution | 3 |
| Fireworks | 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 2019 | Missing data/not specified/undetermined | under an acre | Santa Clara Unit | not named |
| 9 September 2008 | Equipment and vehicle use | under an acre | California Department of Forestry & Fire Protection | not named |
| 8 September 2005 | Debris and open burning | under an acre | California Department of Forestry & Fire Protection | not named |
| 8 September 2004 | Equipment and vehicle use | 1.0 acres | Santa Clara Unit | SMALL |
| 7 September 2020 | Missing data/not specified/undetermined | under an acre | Santa Clara Unit | not named |
| 6 September 2018 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
| 6 September 2018 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
| 6 September 2018 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
Mines and quarries near this property
10 of 30 shownRegional context, not property-specific evidence. The federal mineral resources record lists 30 workings within 5 miles of Wetmore House: 14 past producers, 7 producers, 5 occurrences, 3 unknowns. 7 still produce. What was taken out: Sand and Gravel, Construction, Stone, Sulfur, Lead. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Alum | Sulfur, Silver, Copper | Past Producer | ||
| Berkeley Hills | Sulfur-Pyrite, Copper, Lead | Past Producer | Galena, Pyrite | |
| Kaiser Industries Corp | Clay | Producer | ||
| Leona | Sulfur, Copper, Silver | Past Producer | ||
| Leona Heights | Copper, Gold, Zinc | Past Producer | 1891 | |
| Unnamed Location | Calcium | Prospect | ||
| Alma | Sulfur-Pyrite, Copper, Silver | Occurrence | 1892 | |
| Alma | Copper, Sulfur | Past Producer | Bornite, Chalcocite, Chalcopyrite, Pyrite, Sphalerite | |
| Alum | Sulfur-Pyrite, Copper, Silver | Past Producer | ||
| Cragmont Mine | Mercury | Unknown |
Storms near this property
20 since 2009Regional context, not property-specific evidence. The National Weather Service names Piedmont, the town this property stands in, in 20 storm reports between 2009 and 2026: 16 flood, 2 hail, 1 heavy rain, 1 debris flow. 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 2009 | Heavy Rain | Piedmont | $50,000 | Damage was done to an underground utility trench along Crest Road in Piedmont from torrential rains. Rain water found its way through cracks in the sidewalk and percolated up through the street. As a result, two and a half feet of sand covering a conduit was disturbed or washed away leaving damaged sidewalks. |
| March 2024 | Hail | Piedmont | $10 | Approximate location. Pea-sized hail was reported in the Walnut Creek area via social media. |
| April 2024 | Flood | Piedmont | $10 | One to three feet of flooding was reported on the onramp from MacArthur to Eastbound Interstate 580. |
| November 2024 | Flood | Piedmont | $10 | Lanes 3 and 4 of eastbound Interstate 580 flooded. |
| January 2026 | Flood | Piedmont | - | Onramp from Park Boulevard to northbound California Highway 13 was flooded. |
| February 2025 | Flood | Piedmont | - | Flooding was reported on eastbound Interstate 580 at Harrison Street near Oakland. |
| December 2025 | Flood | Piedmont | - | Four to six inches of water were reported on eastbound Interstate 580 at Harrison Street. |
| December 2025 | Flood | Piedmont | - | Flooding was reported on all lanes of eastbound Interstate 580 at Grand Avenue. |
| January 2023 | Flood | Piedmont | - | Flooding was reported on all lanes of Eastbound Interstate 580 near the Lakeshore Avenue exit in Oakland. |
| December 2022 | Flood | Piedmont | - | CHP reported flooding of the onramp from Northgate Avenue to California Highway 24. |
| March 2021 | Flood | Piedmont | - | This roadway flooding occurred at 3601 Telegraph Ave. |
| January 2020 | Flood | Piedmont | - | Roadway flooding at 3601 Telegraph Ave near Oakland, 1 1/2 feet of water in lanes. |
| January 2020 | Hail | Piedmont | - | Rice sized hail reported by spotter. |
| January 2019 | Flood | Piedmont | - | Standing water in all four lanes of I 580W at 14th Ave. |
| February 2019 | Flood | Piedmont | - | Roadway flooding at 3601 Telegraph Ave. |
| December 2019 | Flood | Piedmont | - | Flooding on 580 eastbound near Harrison St off ramp. |
| February 2018 | Flood | Piedmont | - | Roadway flooding reported at 3601 Telegraph Ave. |
| November 2018 | Flood | Piedmont | - | Roadway flooding reported at 3601 telegraph ave. WB 580 on central off ramp 6 inches of standing water. |
| February 2017 | Debris Flow | Piedmont | - | Large boulder blocking southbound lane of Skyline jso Grizzly Peak. |
| October 2009 | Flood | Piedmont | - | Very bad flooding occurred on Interstate 580 near the intersection of Harrison Street due to heavy rain. |
Maps showing this location
20 surveysUnited 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.
- 1897 USGS Concord quadrangle1:62500 - 6 printings
- 1915 USGS Concord quadrangle1:62500 - 5 printings
- 1942 USGS Concord quadrangle1:62500
- 1943 USGS Concord quadrangle1:62500
- 1947 USGS Oakland East quadrangle1:24000 - 3 printings
- 1947 USGS San Francisco quadrangle1:250000
- 1948 USGS San Francisco quadrangle1:250000
- 1949 USGS Oakland East quadrangle1:24000 - 2 printings
- 1955 USGS San Francisco quadrangle1:250000
- 1956 USGS San Francisco quadrangle1:250000 - 4 printings
- 1957 USGS San Francisco quadrangle1:250000
- 1959 USGS Concord quadrangle1:62500 - 2 printings
- 1959 USGS Oakland East quadrangle1:24000 - 6 printings
- 1960 USGS San Francisco quadrangle1:250000
- 1961 USGS San Francisco quadrangle1:250000
- 1964 USGS San Francisco quadrangle1:250000
- 1971 USGS San Francisco quadrangle1:250000
- 1978 USGS San Francisco quadrangle1:100000 - 2 printings
- 1985 USGS San Francisco quadrangle1:250000
- 1997 USGS Oakland East quadrangle1:24000
Listed places nearby
6 within 8 milesOther 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.
| Photograph | Property | Distance | Listed |
|---|---|---|---|
 | Locke House | 0.9 miles | 1989 |
| Claremont Country Club | 1.1 miles | 2026 | |
 | Treadwell Mansion and Carriage House | 1.2 miles | 1977 |
 | Ladies' Relief Society Children's Home | 1.4 miles | 2006 |
 | The Bellevue-Staten | 1.6 miles | 1991 |
 | Altenheim | 1.8 miles | 2007 |
Sources for this property
| National Archives record | The nomination case file for reference 78000653 in Record Group 79. |
| Alameda County | All 160 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.