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Forest Road 30400 over Gros Ventre River

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

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

Forest Road 30400 over Gros Ventre River in Teton 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 1969, making it 56 years old at the 2025 inventory.
It carries about 450 vehicles a day (traffic count year 2018).
It is one of 68 of the 122 inventoried bridges in Teton County rated fair (55.7%); 15 (12.3%) 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	Prestressed concrete multiple box beam
Length	about 227 ft
Location	20 Mi. NE. of Jackson Wy
NBI structure number	040304000001050
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 89 over Flat Creek	1969	33,675	Fair
Wyo 22 over Wildlife Crossing	2023	18,401	Good
Wyo 22 over Snake River	2023	18,401	Good
US 89 over Flat Creek	1938	15,780	Poor
Wyo 22 over Wildlife Crossing	2023	12,046	Fair
US 89 over Wildlife Crossing	2017	11,949	Good