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Cb Cnty Rd 109 over Mill Creek

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

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

Cb Cnty Rd 109 over Mill Creek in Carbon County, Wyoming, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1940, making it 85 years old at the 2025 inventory.
It carries about 2 vehicles a day (traffic count year 2024).
Its listed owner is the county highway agency.
It is one of 19 of the 206 inventoried bridges in Carbon County rated poor (9.2%); 19 (9.2%) 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

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

Bridge	Built	Vehicles/day	Condition
I-80 Wbl over West Sinclair Intg	2000	7,909	Good
I-80 Wbl over UPRR / Wyo 76	2000	7,909	Good
I-80 EBL and WBL over Sugar Creek	2000	7,637	Fair
I-80 Ebl over West Sinclair Intg	2001	7,637	Good
I-80 Ebl over UPRR / Wyo 76	2001	7,637	Good
I-80 Wbl over Two Mile Draw	1963	7,404	Fair