US Bridges

Wyo 789 over Little Popo Agie River

Fair

Fremont County, Wyoming · Lander - Riverton · Structure no. DDV

Built
1975
50 years old, rebuilt 1986
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
120 ft
3 main spans
Daily traffic
4,380
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 789 over Little Popo Agie River is a steel continuous stringer/multi-beam or girder carrying Wyo 789 over Little Popo Agie River in Fremont County, Wyoming. It was built in 1975 and reconstructed in 1986, so it is 50 years old, older 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 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 4,380 vehicles a day, roughly 8% of them trucks, projected to reach 6,132 by 2043. The structure is 120 ft (36.6 m) long and 45 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

CarriesWyo 789
CrossesLittle Popo Agie River
LocationLander - Riverton
RouteState Highway 789
StateWyoming
Coordinates42.90094, -108.58766
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating66.6 US tons
Inventory rating40 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span53 ft (16.2 m)
Deck width45 ft (13.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,380 (2024)
Projected traffic6,132 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed49.7 mi (80 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 Wyo 789 over Little Popo Agie River built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 1986.

What condition is Wyo 789 over Little Popo Agie 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 August 2024.

How much traffic does Wyo 789 over Little Popo Agie River carry?

About 4,380 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Wyo 789 over Little Popo Agie River?

The structure is 120 ft (36.6 m) long with a longest span of 53 ft (16.2 m) and a deck 45 ft wide.

Who owns Wyo 789 over Little Popo Agie River?

It is owned by the State Highway Agency.