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S 223 over Marias River

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

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

S 223 over Marias River in Liberty 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 1966, making it 59 years old at the 2025 inventory.
It carries about 270 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 7 of the 10 inventoried bridges in Liberty County rated fair (70.0%); 0 (0.0%) 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 stringer or multi-beam girder
Length	about 347 ft
Location	18M SE Chester
NBI structure number	S00223034+03571
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 2 over Cottonwood Creek	1953	2,325	Fair
S 223 over Cottonwood Creek	1960	518	Fair
S 223 over Cottonwood Creek	1963	409	Fair
County Rd 001 over Cottonwood Creek	2020	100	Good
Moffat Rd over Marias River 011	1995	100	Good
Pugsley Rd over Marias River 006	1951	100	Fair