US Bridges

Wyo 789 over Little Snake River

Fair

Carbon County, Wyoming · Creston JCT - Colo Line · Structure no. DJF

Built
1978
47 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
312 ft
5 main spans
Daily traffic
2,628
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 789 over Little Snake River is a steel continuous stringer/multi-beam or girder carrying Wyo 789 over Little Snake River in Carbon County, Wyoming. It was built in 1978, so it is 47 years old, younger than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 2,628 vehicles a day, roughly 18% of them trucks, projected to reach 3,679 by 2043. The structure is 312 ft (95.1 m) long and 44 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesWyo 789
CrossesLittle Snake River
LocationCreston JCT - Colo Line
RouteState Highway 789
CountyCarbon County
StateWyoming
Coordinates41.04011, -107.65662
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length312 ft (95.1 m)
Longest span61 ft (18.7 m)
Deck width44 ft (13.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,628 (2024)
Projected traffic3,679 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$3,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wyo 789 over Little Snake River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Wyo 789 over Little Snake 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 June 2024.

How much traffic does Wyo 789 over Little Snake River carry?

About 2,628 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Wyo 789 over Little Snake River?

The structure is 312 ft (95.1 m) long with a longest span of 61 ft (18.7 m) and a deck 44 ft wide.

Who owns Wyo 789 over Little Snake River?

It is owned by the State Highway Agency.