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Entrance Road over Belle Fourche River

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

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

Entrance Road over Belle Fourche River in Crook County, Wyoming, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1980, making it 45 years old at the 2025 inventory.
It carries about 1,000 vehicles a day (traffic count year 2011).
It is one of 120 of the 176 inventoried bridges in Crook County rated fair (68.2%); 4 (2.3%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Continuous concrete single box beam
Length	about 299 ft
Location	26.6 Miles Northeast of I
NBI structure number	1390001P0000000
Condition class	Fair

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