US Bridges

I-25 Sbl over I-25 Service Road

FairPosted for load

Johnson County, Wyoming · Casper - Kaycee · Structure no. AJU

Built
1960
65 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
67 ft
3 main spans
Daily traffic
1,647
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Sbl over I-25 Service Road is a concrete continuous slab carrying I-25 Sbl over I-25 Service Road in Johnson County, Wyoming. It was built in 1960, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 1,647 vehicles a day, roughly 30% of them trucks, projected to reach 2,306 by 2043. The structure is 67 ft (20.4 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-25 Sbl
CrossesI-25 Service Road
LocationCasper - Kaycee
RouteInterstate 25
CountyJohnson County
StateWyoming
Coordinates43.61631, -106.55286
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length67 ft (20.4 m)
Longest span25 ft (7.6 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,647 (2024)
Projected traffic2,306 by 2043
Trucks30%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-25 Sbl over I-25 Service Road built?

It was built in 1960, making it 65 years old in 2025.

What condition is I-25 Sbl over I-25 Service Road 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 April 2024.

How much traffic does I-25 Sbl over I-25 Service Road carry?

About 1,647 vehicles per day (2024 count), of which roughly 30% are trucks.

How long is I-25 Sbl over I-25 Service Road?

The structure is 67 ft (20.4 m) long with a longest span of 25 ft (7.6 m) and a deck 41 ft wide.

Who owns I-25 Sbl over I-25 Service Road?

It is owned by the State Highway Agency.