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Lemhi Rd;old HWY28 over Lemhi River

Lemhi County, Idaho · rated Fair in the 2025 National Bridge Inventory

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

Lemhi Rd;old HWY28 over Lemhi River in Lemhi County, Idaho, 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 1965, making it 60 years old at the 2025 inventory.
It carries about 50 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 40 of the 114 inventoried bridges in Lemhi County rated fair (35.1%); 9 (7.9%) 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 tee beam
Length	about 25 ft
Location	0.1 S. 0.1 E. Lemhi
NBI structure number	000000000032740
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 93 over Salmon River;salmon Br.	1926	7,300	Poor
US 93 over Salmon River;carmen Br.	1970	2,100	Fair
US 93 over Carmen Creek	1931	2,100	Fair
US 93 over Tower Creek	1931	2,100	Fair
SH 28 over Lemhi River	2001	1,700	Good
SH 28 over Lemhi River	2001	1,700	Good