ECR Kooi Bridge

Listed on the National Register of Historic Places in 1985.

From the record

“The ECR Kooi Bridge is a bridge in Sheridan County, Wyoming, located 2.7 miles (4.3 km) west of the community of Monarch. The bridge carries Sheridan County Road CN3-93 across the Tongue River.”
Wikipedia article ECR Kooi Bridge, CC BY-SA 4.0.

One of 29 National Register listings published here for Sheridan County · listed in 1985 · category: Structure.

Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

The listing

What is counted as historic. The nomination lists 1 structure as contributing to the listing.
Address. Cty. Rd. CN3-93, Monarch, 82839
When was it listed? February 1985
Category. structure
Also known as. Vehicular Truss and Arch Bridges in Wyoming TR
Census division. Sheridan West
National Register reference number. 85000436 - 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

52 since 1992

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 52 fires within 5 miles of ECR Kooi Bridge between 1992 and 2020, burning about 224 acres in total. None 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	25
Debris and open burning	16
Fireworks	5
Equipment and vehicle use	4
Railroad operations and maintenance	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
8 September 2014	Fireworks	40 acres	Wyoming State Forestry	MP 15.50 I-90 EAST BOUND
23 September 2015	Debris and open burning	1.0 acres	Wyoming State Forestry	550 H STREET
14 September 2016	Missing data/not specified/undetermined	1.0 acres	Wyoming State Forestry	not named
13 September 1992	Missing data/not specified/undetermined	1.0 acres	Wyoming State Forestry	not named
31 August 2014	Debris and open burning	1.0 acres	Wyoming State Forestry	166 WOLF CREEK RD.
29 August 2020	Debris and open burning	1.0 acres	Sheridan County	1027 BIGHORN DR
25 August 2020	Equipment and vehicle use	1.0 acres	Sheridan County	TRUCK PULLING TRAILER W/PROBLEMS
18 August 1992	Missing data/not specified/undetermined	3.0 acres	Wyoming State Forestry	not named

Every fire recorded in Sheridan County

Mines and quarries near this property

3 within 5 miles

Regional context, not property-specific evidence. The federal mineral resources record lists 3 workings within 5 miles of ECR Kooi Bridge: 2 producers, 1 occurrence. 2 still produce. What was taken out: Pumice, Clay, Stone. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Site	Commodity	Status
Guernsey Stone Quarry	Pumice	Producer
Unknown	Clay	Producer
Unknown	Stone	Occurrence

Every working recorded in Sheridan County

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

2 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.

Photograph	Property	Distance	Listed
	Connor Battlefield	3.7 miles	1971
	Fort MacKenzie	7.6 miles	1981

Sources for this property

National Archives record	The nomination case file for reference 85000436 in Record Group 79.
Wikipedia article	Community-written account of this property, licensed CC BY-SA.
Sheridan County	All 29 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.