US Bridges

I-25 Nbl over I-25 Service Road

GoodPosted for load

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

Built
1960
65 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
67 ft
3 main spans
Daily traffic
1,749
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over I-25 Service Road is a concrete continuous slab carrying I-25 Nbl 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 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. Its operating status is: posted for load restriction.

It carries about 1,749 vehicles a day, roughly 33% of them trucks, projected to reach 2,449 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).

CarriesI-25 Nbl
CrossesI-25 Service Road
LocationCasper - Kaycee
RouteInterstate 25
StateWyoming
Coordinates43.61657, -106.55241
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.4 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 deck100 ft (30.5 m)

Traffic and service

Average daily traffic1,749 (2024)
Projected traffic2,449 by 2043
Trucks33%
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 Nbl over I-25 Service Road built?

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

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

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

About 1,749 vehicles per day (2024 count), of which roughly 33% are trucks.

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

It is owned by the State Highway Agency.