US Bridges

I-25 Nbl over I-25 Service Road

Fair

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

Built
1965
60 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
94 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 1965, so it is 60 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 1,749 vehicles a day, roughly 33% of them trucks, projected to reach 2,449 by 2043. The structure is 94 ft (28.5 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesI-25 Nbl
CrossesI-25 Service Road
LocationCasper - Kaycee
RouteInterstate 25
CountyJohnson County
StateWyoming
Coordinates43.49934, -106.45116
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 statusOpen, no 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 rating64.4 US tons
Inventory rating38.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length94 ft (28.5 m)
Longest span35 ft (10.7 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,749 (2024)
Projected traffic2,449 by 2043
Trucks33%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 1965, making it 60 years old in 2025.

What condition is I-25 Nbl 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 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 94 ft (28.5 m) long with a longest span of 35 ft (10.7 m) and a deck 40 ft wide.

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

It is owned by the State Highway Agency.