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S 13 over S Fork Buffalo Creek

McCone County, Montana · rated Fair in the 2025 National Bridge Inventory

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

S 13 over S Fork Buffalo Creek in McCone County, Montana, 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 1988, making it 37 years old at the 2025 inventory.
It carries about 792 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 34 of the 43 inventoried bridges in McCone County rated fair (79.1%); 4 (9.3%) 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

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

Bridge	Built	Vehicles/day	Condition
S 200 over Redwater River	1933	1,263	Fair
Irr - S 13 over Drainage	1995	985	Fair
Irr - S 13 over Drainage-stockpass	1995	985	Good
Irr - S 13 over Nickwall Creek	1995	985	Fair
S 200S over Buffalo Spring Creek	1966	971	Fair
S 13 over Horse Creek	1988	910	Fair