US Bridges

US-91 (SR-91) over Little Bear River

Fair

Cache County, Utah · East of Wellsville · Structure no. 0D 500

Built
1947
78 years old, rebuilt 1989
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
45 ft
1 main span
Daily traffic
16,370
2014 count
Owner
State
State Highway Agency

About this bridge

US-91 (SR-91) over Little Bear River is a concrete tee beam carrying US-91 (SR-91) over Little Bear River in Cache County, Utah. It was built in 1947 and reconstructed in 1989, so it is 78 years old, older than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 16,370 vehicles a day, roughly 18% of them trucks, projected to reach 20,463 by 2034. The structure is 45 ft (13.6 m) long and 86 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesUS-91 (SR-91)
CrossesLittle Bear River
LocationEast of Wellsville
RouteU.S. Route 91
StateUtah
Coordinates41.64158, -111.91627
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating32.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length45 ft (13.6 m)
Longest span42 ft (12.8 m)
Deck width86 ft (26.1 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,370 (2014)
Projected traffic20,463 by 2034
Trucks18%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US-91 (SR-91) over Little Bear River built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1989.

What condition is US-91 (SR-91) over Little Bear River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does US-91 (SR-91) over Little Bear River carry?

About 16,370 vehicles per day (2014 count), of which roughly 18% are trucks.

How long is US-91 (SR-91) over Little Bear River?

The structure is 45 ft (13.6 m) long with a longest span of 42 ft (12.8 m) and a deck 86 ft wide.

Who owns US-91 (SR-91) over Little Bear River?

It is owned by the State Highway Agency.