BlockFrom the record
One of 4 National Register listings published here for Trinity County · listed in 1984 · category: District.
Sources: the case file at the National Archives · the National Register database, National Park Service
Helena Historic District
Listed on the National Register of Historic Places in 1984. 7 historic topographic surveys show this location, the earliest from 1909.
The listing
- Address. N of U.S. 299 W, on North Fork of Trinity River, Helena, 96010
- When was it listed? May 1984
- Category. district
- Census division. Northwest Trinity
- National Register reference number. 84001219 - 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
1909 to 1998The ground this property stands on, surveyed 89 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
120 since 1992Regional context, not property-specific evidence. The federal wildfire occurrence database lists 120 fires within 5 miles of Helena Historic District between 1992 and 2020, burning about 87,138 acres in total. 30 started naturally. 1 was 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 |
|---|---|
| Natural | 30 |
| Missing data/not specified/undetermined | 27 |
| Equipment and vehicle use | 17 |
| Recreation and ceremony | 16 |
| Debris and open burning | 15 |
| Power generation/transmission/distribution | 9 |
| Misuse of fire by a minor | 4 |
| Arson/incendiarism | 1 |
| Other causes | 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 1998 | Natural | under an acre | Shasta-Trinity National Forest | BIG II |
| 9 September 1997 | Natural | under an acre | Shasta-Trinity National Forest | NORTH FORK |
| 8 September 2009 | Missing data/not specified/undetermined | 2.6 acres | Shasta-Trinity National Forest | HELENA |
| 5 September 2019 | Natural | 18 acres | Shasta-Trinity National Forest | CUTTHROAT |
| 4 September 2003 | Natural | under an acre | Shasta-Trinity National Forest | DIGGER |
| 28 September 1994 | Natural | 1.0 acres | Central California District | ABC MISC |
| 24 September 2001 | Equipment and vehicle use | under an acre | Shasta-Trinity National Forest | DUTCH |
| 24 September 1998 | Recreation and ceremony | under an acre | Shasta-Trinity National Forest | HELO |
Mines and quarries near this property
10 of 65 shownRegional context, not property-specific evidence. The federal mineral resources record lists 65 workings within 5 miles of Helena Historic District: 34 past producers, 14 unknowns, 11 occurrences, 4 producers. 4 still produce. What was taken out: Gold, Silver, Platinum, Copper. 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 |
|---|---|---|---|---|
| Placer Dev. Co. | Gold, Osmium, Silver | Past Producer | ||
| Sourdough Group | Gold, Platinum, Silver | Past Producer | ||
| Valdor Dredge | Gold, Platinum, Iridium, Osmium | Producer | 1916 | |
| Lorenze | Copper | Occurrence | ||
| Lorenze | Copper | Occurrence | ||
| Junction City | Gold, Platinum | Producer | STREAM PLACER | |
| Old Eagle Mine | Platinum | Occurrence | ||
| Valdor | Gold, Platinum | Unknown | ||
| Antonia | Gold, Silver | Past Producer | ||
| Barthol - Jacobs | Gold, Silver | Past Producer |
Storms near this property
5 since 2022Regional context, not property-specific evidence. The National Weather Service names Helena, the town this property stands in, in 5 storm reports between 2022 and 2025: 5 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.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| March 2024 | Heavy Rain | Helena | $1,000 | Partial slide block the road about 2 miles east of Helena, CA.|LAT. 40.77N, LONG. -123.08W. |
| January 2025 | Heavy Rain | Helena | - | Rock slide reported in one lane of hwy 299, 2 miles east of Helena, CA. |Lat. 40.77N, Long. -123.09W. |
| March 2024 | Heavy Rain | Helena | - | A landslide blocking the westbount lane of the 299 2 miles east of Helena, CA. LAT. 40.77N, LONG. -123.09W. |
| January 2023 | Heavy Rain | Helena | - | Earth slide partially covering HWY 299. |
| December 2022 | Heavy Rain | Helena | - | Heavy rain caused a landslide across HWY 299 east of Helena. |
Maps showing this location
7 surveysUnited 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.
- 1909 USGS Big Bar quadrangle1:96000 - 2 printings
- 1915 USGS Big Bar and Vicinity quadrangle1:250000 - 5 printings
- 1951 USGS Helena quadrangle1:62500 - 5 printings
- 1958 USGS Redding quadrangle1:250000 - 5 printings
- 1982 USGS Hayfork quadrangle1:100000
- 1982 USGS Helena quadrangle1:24000
- 1998 USGS Helena quadrangle1:24000
Sources for this property
| National Archives record | The nomination case file for reference 84001219 in Record Group 79. |
| Trinity County | All 4 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.