BlockFrom the record
One of 36 National Register listings published here for Natrona County · listed in 1976 · category: Site.
Sources: the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article
Split Rock, Twin Peaks
Listed on the National Register of Historic Places in 1976.
The listing
- What is counted as historic. The nomination lists 1 site as contributing to the listing.
- Address. NW of Muddy Gap, Muddy Gap
- When was it listed? December 1976
- Category. site
- Census division. Hells Half Acre
- National Register reference number. 76001959 - 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.
Fires near this property
13 since 1996Regional context, not property-specific evidence. The federal wildfire occurrence database lists 13 fires within 5 miles of Split Rock, Twin Peaks between 1996 and 2020, burning about 156 acres in total. 8 started naturally. None 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 | 8 |
| Missing data/not specified/undetermined | 2 |
| Fireworks | 1 |
| Power generation/transmission/distribution | 1 |
| Recreation and ceremony | 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 |
|---|---|---|---|---|
| 19 August 1996 | Fireworks | under an acre | Rawlins Field Office | DRY DRAW |
| 15 August 2000 | Natural | under an acre | Rawlins Field Office | BAJA |
| 14 August 2018 | Natural | 2.6 acres | Lander Field Office | SPLIT ROCK |
| 7 July 2017 | Natural | 18 acres | Casper Field Office | BEATON POCKET |
| 6 July 2001 | Natural | under an acre | Rawlins Field Office | SWEETWATER |
| 27 July 2004 | Natural | under an acre | Lander Field Office | LANKIN |
| 26 July 2004 | Natural | under an acre | Lander Field Office | VICE |
| 20 July 2017 | Missing data/not specified/undetermined | under an acre | Casper Field Office | CROSS 2 |
Mines and quarries near this property
5 within 5 milesRegional context, not property-specific evidence. The federal mineral resources record lists 5 workings within 5 miles of Split Rock, Twin Peaks: 5 unknowns. None of them still produces. What was taken out: Pumice, Zeolites, Uranium. 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 |
|---|---|---|---|---|
| Split Rock Mine | Uranium | Unknown | ||
| Unknown | Zeolites | Unknown | ||
| Split Rock Area | Pumice | Unknown | ||
| Split Rock Area #1 | Pumice | Unknown | ||
| Split Rock Area #2 | Pumice | Unknown |
Map coverage status
No historic map-sheet match is published for this property yet. That does not mean no map exists. This record needs a coordinate-quality review before it can be joined to a sheet boundary. Browse the county's mapped places while that work is pending.
Sources for this property
| National Archives record | The nomination case file for reference 76001959 in Record Group 79. |
| Wikipedia article | Community-written account of this property, licensed CC BY-SA. |
| Natrona County | All 36 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.