Listed on the National Register of Historic Places in 1988. 16 historic topographic surveys show this location, the earliest from 1896.
“The Port Costa School was built to serve the community of Port Costa, California. Residents voted to fund the school with a bond in April 1911, and construction began later that year.”
Wikipedia article Port Costa School, CC BY-SA 4.0.
One of 49 National Register listings published here for Contra Costa County · listed in 1988 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service
The ground this property stands on, surveyed 87 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.
Regional context, not property-specific evidence. The federal wildfire occurrence database lists 492 fires within 5 miles of Port Costa School between 1992 and 2020, burning about 2,004 acres in total. None started naturally. 62 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 | 297 |
| Arson/incendiarism | 62 |
| Equipment and vehicle use | 55 |
| Smoking | 30 |
| Misuse of fire by a minor | 25 |
| Debris and open burning | 9 |
| Power generation/transmission/distribution | 8 |
| Railroad operations and maintenance | 4 |
| Recreation and ceremony | 1 |
| 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 2007 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
| 9 September 2003 | Equipment and vehicle use | under an acre | Santa Clara Unit | FOUR |
| 8 September 2005 | Smoking | 1.0 acres | California Department of Forestry & Fire Protection | not named |
| 7 September 2012 | Missing data/not specified/undetermined | under an acre | Santa Clara Unit | not named |
| 7 September 2011 | Misuse of fire by a minor | under an acre | Santa Clara Unit | not named |
| 7 September 2011 | Missing data/not specified/undetermined | under an acre | Santa Clara Unit | not named |
| 7 September 2010 | Smoking | under an acre | California Department of Forestry & Fire Protection | not named |
| 7 September 1995 | Equipment and vehicle use | 2.0 acres | Santa Clara Unit | PG&E ALHAMBRA |
Regional context, not property-specific evidence. The federal mineral resources record lists 16 workings within 5 miles of Port Costa School: 6 unknowns, 5 occurrences, 3 past producers, 2 producers. 2 still produce. What was taken out: Stone, Mercury, Stone, Dimension, Stone, Crushed/Broken. 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 |
|---|---|---|---|---|
| Sand Pit | Sand and Gravel, Construction | Unknown | ||
| Unnamed Location | Clay | Occurrence | ||
| Main Mine & Mill | Stone, Crushed/Broken | Producer | ||
| Martinez | Stone, Dimension | Occurrence | ||
| Mcnears | Stone, Dimension | Occurrence | ||
| Port Costa Shale Quarrys | Stone, Crushed/Broken | Producer | ||
| Borges Prospect | Mercury | Occurrence | Cinnabar | |
| Borges Prospect | Mercury | Unknown | ||
| Hastings Mine | Mercury | Past Producer | 1875 | |
| Franklin | Stone | Unknown |
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.
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.
| Photograph | Property | Distance | Listed |
|---|---|---|---|
| Memorial Hall | 1.4 miles | 2014 | |
 | Tucker House | 3.3 miles | 1999 |
 | Martinez Downtown Post Office | 3.4 miles | 2012 |
 | Borland House | 3.4 miles | 2015 |
| Contra Costa County Courthouse Block | 3.5 miles | 1989 | |
 | Contra Costa County Hall of Records | 3.5 miles | 1991 |
| National Archives record | The nomination case file for reference 88000563 in Record Group 79. |
| Wikipedia article | Community-written account of this property, licensed CC BY-SA. |
| Contra Costa County | All 49 listed properties in this county. |
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