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Irr - S 13 over Sprague Coulee

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

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

Irr - S 13 over Sprague Coulee in Roosevelt County, Montana, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1931 and reconstructed in 1976, making it 94 years old at the 2025 inventory.
It carries about 229 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 7 of the 57 inventoried bridges in Roosevelt County rated poor (12.3%); 7 (12.3%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Timber stringer or multi-beam girder
Length	about 77 ft
Location	23M S Scobey
NBI structure number	P00032027+06021
Condition class	Poor

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