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Irr - S 13 over Missouri River

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

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

Irr - S 13 over Missouri River in Roosevelt 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 1998, making it 27 years old at the 2025 inventory.
It carries about 1,163 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 36 of the 57 inventoried bridges in Roosevelt County rated fair (63.2%); 7 (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	Continuous steel stringer or multi-beam girder
Length	about 625 ft
Location	6M SE Wolf Point
NBI structure number	P00025046+05391
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Irr - US 2 over Mosquito Creek	1986	4,269	Fair
Irr - US 2 over Little Wolf Creek	1988	4,269	Fair
Irr - US 2 over Poplar River	2000	2,296	Fair
S 16 over Sheep Creek	1970	2,129	Fair
Irr - US 2 over Tule Creek	1958	2,054	Fair
Irr - US 2 over Chelsea Creek	1960	2,054	Poor