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S 261 over O`brien Creek

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

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

S 261 over O`brien Creek in Richland County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1977, making it 48 years old at the 2025 inventory.
It carries about 95 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 66 of the 97 inventoried bridges in Richland County rated fair (68.0%); 4 (4.1%) 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 102 ft
Location	9M S Sidney
NBI structure number	S00261047+09001
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
S 16-holly St over Usrs Canal	1999	5,874	Fair
S 200 over First Hay Creek	1986	4,499	Fair
S 200 over Second Hay Creek	1986	4,499	Good
S 16-s Central Ave over Lone Tree Creek	1974	3,968	Fair
14TH St SE over Lone Tree Creek	1973	3,099	Fair
S 16 over Usbr Main Canal	1984	2,821	Fair