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Jo Cnty Rd 78 over Middle Fork Powder River

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

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

Jo Cnty Rd 78 over Middle Fork Powder River in Johnson 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 1990, making it 35 years old at the 2025 inventory.
It carries about 13 vehicles a day (traffic count year 2024).
Its listed owner is the county highway agency.
It is one of 141 of the 204 inventoried bridges in Johnson County rated fair (69.1%); 7 (3.4%) 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

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

Bridge	Built	Vehicles/day	Condition
I-25 / US 87 Bus over Clear Creek	1975	5,733	Fair
I-90 Wbl over Jo CR 213 (Monument Rd)	1966	3,990	Fair
I-90 Wbl over Jo CR 1 (Rock Creek Rd)	1963	3,990	Fair
I-90 Ebl over Jo CR 39 (Lake Ridge Rd)	1966	3,980	Fair
I-90 Ebl over Jo CR 1 (Rock Creek Rd)	1963	3,980	Fair
I-90 Wbl over Piney Creek	1966	3,740	Fair