Home › Montana › Glacier County › Irr - US 89 over Two Medicine Canal

Irr - US 89 over Two Medicine Canal

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

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

Irr - US 89 over Two Medicine Canal in Glacier County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1950, making it 75 years old at the 2025 inventory.
It carries about 1,475 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 40 of the 71 inventoried bridges in Glacier County rated fair (56.3%); 3 (4.2%) 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	Timber stringer or multi-beam girder
Length	about 50 ft
Location	10M SE Browning
NBI structure number	P00003102+06371
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 RR	1997	3,716	Good
Irr - US 2 over Cut Bank Creek	2007	3,523	Fair
Irr - US 2 over RR	1997	2,515	Good
Irr - US 89 over St Marys River	1956	2,355	Fair
Going-to-the-sun R over St. Mary River	1934	2,300	Fair
Going-to-the-sun R over Divide Creek	1934	2,300	Fair