US Bridges

600 South over Little Bear River

Good

Cache County, Utah · 4620 W. 600 S. Logan · Structure no. 005008V

Built
1985
40 years old
Condition
Good
inspected May 2024
Type
Culvert
Steel
Length
35 ft
2 main spans
Daily traffic
1,890
2014 count
Owner
County
County Highway Agency

About this bridge

600 South over Little Bear River is a steel culvert carrying 600 South over Little Bear River in Cache County, Utah. It was built in 1985, so it is 40 years old, younger than the Utah average of 40.1 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 1,890 vehicles a day, roughly 1% of them trucks, projected to reach 2,296 by 2034. The structure is 35 ft (10.7 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Carries600 South
CrossesLittle Bear River
Location4620 W. 600 S. Logan
RouteCounty Highway 1184
StateUtah
Coordinates41.71892, -111.94481
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating60.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHL 93
Structure length35 ft (10.7 m)
Longest span16 ft (5 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,890 (2014)
Projected traffic2,296 by 2034
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 600 South over Little Bear River built?

It was built in 1985, making it 40 years old in 2025.

What condition is 600 South over Little 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 May 2024.

How much traffic does 600 South over Little Bear River carry?

About 1,890 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is 600 South over Little Bear River?

The structure is 35 ft (10.7 m) long with a longest span of 16 ft (5 m) and a deck 40 ft wide.

Who owns 600 South over Little Bear River?

It is owned by the County Highway Agency.