BlockHerpoco, California
27 topographic sheets cover this place, the earliest surveyed in 1902 and the latest in 1983. It stands in the West Contra Costa census division. It lies in ZIP code area 94547. It lies near Refugio Valley. The Survey maps it on the Mare Island quadrangle. It stands 56 feet above sea level.
Then and now
1902 to 1983The same ground, surveyed 81 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.
Topographic sheets covering this place
12 surveys from 27 printed sheetsMatched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.
- 1902 USGS Napa quadrangle1:125000, 6 printings
- 1916 USGS Mare Island quadrangle1:62500, 4 printings
- 1942 USGS Mare Island quadrangle1:62500
- 1947 USGS Santa Rosa quadrangle1:250000
- 1949 USGS Mare Island quadrangle1:24000
- 1949 USGS Santa Rosa quadrangle1:250000, 2 printings
- 1951 USGS Mare Island quadrangle1:24000
- 1958 USGS Santa Rosa quadrangle1:250000, 3 printings
- 1959 USGS Mare Island quadrangle1:24000, 5 printings
- 1962 USGS Santa Rosa quadrangle1:250000
- 1964 USGS Santa Rosa quadrangle1:250000
- 1983 USGS Napa quadrangle1:100000
Fires near this place
365 since 1992Regional context, not property-specific evidence. The federal wildfire occurrence database lists 365 fires within 5 miles of Herpoco between 1992 and 2020, burning about 1,474 acres in total. None started naturally. 68 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 | 223 |
| Arson/incendiarism | 68 |
| Equipment and vehicle use | 35 |
| Misuse of fire by a minor | 14 |
| Smoking | 12 |
| Power generation/transmission/distribution | 6 |
| Debris and open burning | 3 |
| Railroad operations and maintenance | 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 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 |
| 7 September 2018 | Missing data/not specified/undetermined | under an acre | 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 | Missing data/not specified/undetermined | under an acre | Santa Clara Unit | not named |
| 7 September 1995 | Equipment and vehicle use | 2.0 acres | Santa Clara Unit | PG&E ALHAMBRA |
| 6 September 2012 | Missing data/not specified/undetermined | under an acre | Santa Clara Unit | not named |
| 5 September 1995 | Missing data/not specified/undetermined | under an acre | Santa Clara Unit | HWY 4 |
Settlements close enough to share some of these fires:
Mines and quarries near this place
7 within 5 milesRegional context, not property-specific evidence. The federal mineral resources record lists 7 workings within 5 miles of Herpoco: 4 occurrences, 2 prospects, 1 past producer. None of them still produces. What was taken out: Stone, Crushed/Broken, Diatomite, Stone, Dimension, Stone. 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 |
|---|---|---|---|---|
| Mcnears | Stone, Dimension | Occurrence | ||
| Mcnears | Stone | Past Producer | ||
| Pinole | Diatomite | Prospect | ||
| Pinole Dohrman, Pawsey | Diatomite | Occurrence | Sedimentary | |
| Diablo | Stone, Crushed/Broken | Occurrence | ||
| Diablo | Stone, Crushed/Broken | Prospect | ||
| Mcnear Point Quarry | Stone, Crushed/Broken | Occurrence |
Nearest settlements
The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.
Elsewhere
Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.
| Wikipedia article on Herpoco | An encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied. |
| Wikidata item Q5743798 | The structured record the population and elevation above come from. Public domain (CC0). |
Provenance
This settlement is recorded in the Geographic Names Information System as feature 1658743. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.
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.