A National Historic Landmark. Listed on the National Register of Historic Places in 2000.
From the record
“The Shenandoah-Dives Mill or Mayflower Mill is an intact and functional but inactive historic ore mill 2 miles (3.2 km) east of Silverton, Colorado, United States. The mill was built in 1929 to recover gold, silver, lead, zinc, and copper from ore mined at the Mayflower mine and brought to the mill by an aerial tramway.”
Wikipedia article Shenandoah-Dives Mill, CC BY-SA 4.0.
One of 6 National Register listings published here for San Juan County · listed in 2000 · category: Building · a National Historic Landmark.
National Register reference number.00000262- 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
4 since 1994
Regional context, not property-specific
evidence. The
federal wildfire occurrence database
lists 4 fires within 5 miles of Shenandoah-Dives Mill
between 1994 and 2011, burning about 1 acre in total. 2 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
2
Missing data/not specified/undetermined
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.
Regional context, not property-specific
evidence. The federal mineral resources record lists
339 workings within 5 miles of Shenandoah-Dives Mill: 125 past producers, 86 unknowns, 75 producers, 48 occurrences.
76 still produce. What was taken out: Zinc, Tungsten, Copper, Gold, Lead, Silver, Lead. Distance is straight-line from the
map coordinates, so a quarry counted here may appear on a neighbouring
settlement's page as well.
Regional context, not property-specific
evidence. The National Weather Service names
Silverton, the town this property stands in, in 6 storm reports between 1996 and 2021: 4 flash flood, 1 lightning, 1 debris flow.
The reports record 4 injuries. 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.
Heavy convective rainfall concentrated just north of the La Plata and San Juan County line produced a massive flow of water, rock, and mud which traveled across the Durango to Silverton Narrow Gage Railroad track and dammed up the Animas River about one mile north of Needleton. Initially, the entire river channel was dammed. The river bed at that location was raised 8 feet on the east side of the channel and remained blocked on the west side of the channel. The debris flow covered about 250 feet of railroad track. The peak depth of debris on the railroad track was measured at close to 45 feet. The railroad track did not sustain significant damage, because the lowest several feet of debris on the track consisted primarily of mud. On top of the mud was a lot of rock material with some trees mixed in it.
A debris flow occurred as a result of heavy rain over Ophir Pass in the Southwest San Juan Mountains. Social media footage showed a combination of rock and mud across the pass with cars having to turn around as a result of the debris flow.
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
4 within 8 miles
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.
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.
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