BlockFrom the record
One of 9 National Register listings published here for San Miguel County · listed in 2025 · category: District.
Sources: the National Register database, National Park Service
Burro Mine Complex
Listed on the National Register of Historic Places in 2025.
The listing
- Address. Northern slope of Burro Canyon in rural western San Miguel County. Located off of San Miguel County Road 10S, north of the abandoned town of Slick Rock, Egnar, 81325
- When was it listed? April 2025
- Category. district
- Also known as. Historic Radium, Uranium, and Vanadium Mining Resources in the Uravan Mineral Belt, Colorado MPS
- Census division. West San Miguel
- National Register reference number. 100011728 - assigned by the National Park Service when the property was listed.
Fires near this property
33 since 1993Regional context, not property-specific evidence. The federal wildfire occurrence database lists 33 fires within 5 miles of Burro Mine Complex between 1993 and 2019, burning about 101 acres in total. 32 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 | 32 |
| 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 |
|---|---|---|---|---|
| 11 September 2019 | Natural | under an acre | Tres Rios Field Office | BUSH |
| 1 September 2014 | Natural | 1.0 acres | Egnar-Slick Rock Fire Protection District | UNKNOWN |
| 3 August 2012 | Natural | under an acre | Tres Rios Field Office | EGNAR 2 |
| 26 August 2018 | Natural | under an acre | Tres Rios Field Office | BELL CREEK |
| 16 August 2010 | Natural | under an acre | Tres Rios Field Office | ADAMS |
| 13 August 2003 | Natural | under an acre | Tres Rios Field Office | MINERAL |
| 10 August 2004 | Natural | 1.0 acres | Tres Rios Field Office | STEVEN WFU |
| 9 July 2014 | Natural | under an acre | Tres Rios Field Office | DELUXE MINE |
Mines and quarries near this property
10 of 231 shownRegional context, not property-specific evidence. The federal mineral resources record lists 231 workings within 5 miles of Burro Mine Complex: 96 past producers, 60 occurrences, 46 unknowns, 22 producers. 22 still produce. What was taken out: Uranium, Uranium, Vanadium, Vanadium, Vanadium, 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 |
|---|---|---|---|---|
| Cougar Mine | Uranium, Vanadium, Copper, Silver, Lead, Selenium | Past Producer | Carnotite, Tyuyamunite | |
| Crushing Mill | Stone | Past Producer | ||
| Unk | Sand and Gravel, Construction | Past Producer | ||
| Unknown | Uranium, Vanadium, Sand and Gravel, Construction | Producer | Sedimentary | |
| Oniell Radium Group | Tantalum | Past Producer | ||
| Roger Nos. 2 & 5 | Uranium, Tantalum | Past Producer | ||
| Lucky Strike and Lucky Strike No. | Gold | Past Producer | ||
| Skidmore | Gold | Past Producer | ||
| Unk | Gold | Occurrence | ||
| Bush Canyon | Vanadium, Uranium | Prospect |
Storms near this property
10 since 2000Regional context, not property-specific evidence. The National Weather Service names Egnar, the town this property stands in, in 10 storm reports between 2000 and 2025: 3 heavy rain, 2 flash flood, 2 flood, 1 hail. 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 |
|---|---|---|---|---|
| August 2023 | Flood | Egnar | $2,000 | A CoCoRaHS observer southwest of Redvale reported flooding as a result of heavy rain from thunderstorms. Over an inch of rain was recorded, which led to partial erosion of the observer's irrigation ditch. |
| July 2010 | Heavy Rain | Egnar | $500 | An access road to Highway 141 was washed out in one spot due to runoff from heavy rainfall. |
| June 2025 | Debris Flow | Egnar | - | The Colorado Department of Transportation closed down both lanes of Colorado Highway 145 at mile marker 95 due to a mudslide around 1:35 PM MDT. This closure was lifted later that afternoon, once the road was cleared of mud. No reports of damages, fatalities, or injuries were received other than the temporary road closure. |
| May 2023 | Flood | Egnar | - | Flooding occurred at the Gypsum Valley Boat Launch as a result of increased snowmelt and flow along the Dolores River. |
| August 2011 | Flash Flood | Egnar | - | Flash flooding caused normally dry washes to run full and out of banks onto residences in the Egnar area. |
| August 2007 | Heavy Rain | Egnar | - | Rainfall runoff from slow moving thunderstorms over southwest San Miguel County deposited debris on Highway 141 at various places from just south of Egnar to Slick Rock. Colorado Department of Transportation road crews used plows to clear the debris. |
| August 2006 | Flash Flood | Egnar | - | no account filed |
| September 2003 | Heavy Rain | Egnar | - | no account filed |
| September 2002 | Thunderstorm Wind | Egnar | - | no account filed |
| September 2000 | Hail | Egnar | - | no account filed |
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.
Listed places nearby
1 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 |
|---|---|---|---|
| Bachelor Mine | 7.4 miles | 2023 |
Sources for this property
| National Archives record | The nomination case file for reference 100011728 in Record Group 79. |
| San Miguel County | All 9 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.