US Bridges

I-25 Sbl over Ttt Road

Fair

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

Built
1960
65 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
1,647
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Sbl over Ttt Road is a concrete continuous slab carrying I-25 Sbl over Ttt 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 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 1,647 vehicles a day, roughly 30% of them trucks, projected to reach 2,306 by 2043. The structure is 93 ft (28.3 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
CrossesTtt Road
LocationCasper - Kaycee
RouteInterstate 25
CountyJohnson County
StateWyoming
Coordinates43.6553, -106.62859
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 rating60.8 US tons
Inventory rating36.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length93 ft (28.3 m)
Longest span35 ft (10.7 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
CarriesOverpass structure at an interchange
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 Ttt Road built?

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

What condition is I-25 Sbl over Ttt 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 March 2023.

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

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

How long is I-25 Sbl over Ttt Road?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 41 ft wide.

Who owns I-25 Sbl over Ttt Road?

It is owned by the State Highway Agency.