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Cr Cnty Rd 129 over I-90

Crook County, Wyoming · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Cr Cnty Rd 129 over I-90 in Crook County, Wyoming, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1977, making it 48 years old at the 2025 inventory.
It carries about 133 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 4 of the 176 inventoried bridges in Crook County rated poor (2.3%); 4 (2.3%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 261 ft
Location	Sundance - S Dakota Line
NBI structure number	DHR
Condition class	Poor

Source: FHWA National Bridge Inventory, 2025 data as reported by the Wyoming department of transportation.

Bridge	Built	Vehicles/day	Condition
US 14 over S Fork Sundance Creek	1954	3,482	Fair
I-90 Wbl over Well Creek	1969	3,214	Fair
I-90 Wbl over Machinery Pass	1969	3,214	Fair
I-90 Ebl over Wyo 585	1972	2,981	Good
I-90 Ebl over Machinery Pass	1972	2,981	Fair
I-90 Ebl over I-90 Bus. / US 14	1972	2,981	Good