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Ni Cnty Rd 9 over Cheyenne River

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

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

Ni Cnty Rd 9 over Cheyenne River in Niobrara County, Wyoming, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1920 and reconstructed in 1960, making it 105 years old at the 2025 inventory.
It carries about 3 vehicles a day (traffic count year 2024).
Its listed owner is the county highway agency.
It is one of 1 of the 34 inventoried bridges in Niobrara County rated poor (2.9%); 1 (2.9%) 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
US 18 over Niobrara River	1988	2,942	Fair
US 85 over UPRR	2016	2,942	Good
US 18 over Stockpass	1970	2,406	Good
US 18 over Old Woman Creek	1971	2,150	Fair
US 18 over Old Woman Creek	1987	2,150	Fair
US 18 over Mule Creek	1988	2,150	Fair