US Bridges

US 89 over Bear River

Good

Bear Lake County, Idaho · 2.0 W. Montpelier · Structure no. 000000000016700

Built
1973
52 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
129 ft
2 main spans
Daily traffic
3,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 89 over Bear River is a prestressed concrete stringer/multi-beam or girder carrying US 89 over Bear River in Bear Lake County, Idaho. It was built in 1973, so it is 52 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,500 vehicles a day, roughly 11% of them trucks, projected to reach 5,250 by 2042. The structure is 129 ft (39.3 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 89
CrossesBear River
Location2.0 W. Montpelier
RouteU.S. Route 89
StateIdaho
Coordinates42.30878, -111.34564
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating43 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length129 ft (39.3 m)
Longest span63 ft (19.2 m)
Deck width46 ft (13.9 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic5,250 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 89 over Bear River built?

It was built in 1973, making it 52 years old in 2025.

What condition is US 89 over Bear River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does US 89 over Bear River carry?

About 3,500 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 89 over Bear River?

The structure is 129 ft (39.3 m) long with a longest span of 63 ft (19.2 m) and a deck 46 ft wide.

Who owns US 89 over Bear River?

It is owned by the State Highway Agency.