Also known as. Vehicular Truss and Arch Bridges in Wyoming TR
Census division. Thermopolis West
Architect. Monarch Engineering Co.
National Register reference number.85000424- 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
14 since 1992
Regional context, not property-specific
evidence. The
federal wildfire occurrence database
lists 14 fires within 5 miles of EFP Bridge over Owl Creek
between 1992 and 2018, burning about 3,918 acres in total. 4 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
Missing data/not specified/undetermined
7
Natural
4
Power generation/transmission/distribution
2
Debris and open burning
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
1 working within 5 miles of EFP Bridge over Owl Creek: 1 past producer.
None of them still produces. What was taken out: Sand and Gravel, Construction. 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
Thermopolis, the town this property stands in, in 55 storm reports between 1996 and 2025: 25 hail, 18 thunderstorm wind, 5 flash flood, 3 funnel cloud.
The reports record 1 death and 1 injury. 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.
Very heavy rain fell in southern Hot Springs County. This triggered numerous mud and rock slides, some tumbling several hundred feet or more to the bottom of the Wind River Canyon. State Highway 789 through the canyon was covered with mud, rock, and debris in several locations between mileposts 120 and 123. One Wyoming Department of Transportation employee was briefly trapped in his front-end loader as he tried to clear away small slides at the onset of the event. The massive amount of debris on the highway resulted in the closure of the road from Sunday afternoon, May 24, until Wednesday morning, May 27. Additional slides on the west side of the Wind River Canyon destroyed several sections of railroad track that resulted in a halt of train traffic for several days.
A brief landspout tornado touched down in downtown Thermopolis, near the intersection of US Hwy 20 and WY Hwy 120. Maximum winds were estimated between 65 to 75 mph as it caused damage to sheet metal roofing and car windows.
Microburst winds of 50 to 60 mph uprooted a 50-foot Cottonwood tree and blew a one-foot diameter branch about 50 feet in Hot Springs State Park. The wind was also responsible for moving a metal shed across a street near the Hot Springs County fairgrounds.
Heavy rain caused flooding near the town of Thermopolis. South of Thermopolis, Buffalo Creek overflowed its banks and flooded nearby low lying areas. A mobile home community experienced flooding in East Thermopolis as small creeks and streams were inundated with water.
Several wind gusts over 58 mph were recorded at Thermopolis with a peak speed of 67 mph. The gusts were the result of weak convection and a strong pressure gradient ahead of an approaching cold front.
A thunderstorm formed over the Wind River Basin and moved north over the Owl Creek Mountains producing a 63 mph wind gust at an automated station on Boysen Peak.
A thunderstorm formed over the Wind River Basin and moved north over the Owl Creek Mountains producing a wind gust of 62 mph at an automated station on the west side of Thermopolis.
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.
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.