US Bridges

I-80 Wbl over Shamrock Road

Fair

Carbon County, Wyoming · Rock Springs - Rawlins · Structure no. ATG

Built
1959
66 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
87 ft
3 main spans
Daily traffic
7,133
2024 count
Owner
State
State Highway Agency

About this bridge

I-80 Wbl over Shamrock Road is a concrete continuous slab carrying I-80 Wbl over Shamrock Road in Carbon County, Wyoming. It was built in 1959, so it is 66 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 7,133 vehicles a day, roughly 54% of them trucks, projected to reach 9,986 by 2043. The structure is 87 ft (26.5 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-80 Wbl
CrossesShamrock Road
LocationRock Springs - Rawlins
RouteInterstate 80
CountyCarbon County
StateWyoming
Coordinates41.78557, -107.41058
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 inspectionMay 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 rating58.6 US tons
Inventory rating34.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length87 ft (26.5 m)
Longest span32 ft (9.9 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,133 (2024)
Projected traffic9,986 by 2043
Trucks54%
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-80 Wbl over Shamrock Road built?

It was built in 1959, making it 66 years old in 2025.

What condition is I-80 Wbl over Shamrock 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 May 2023.

How much traffic does I-80 Wbl over Shamrock Road carry?

About 7,133 vehicles per day (2024 count), of which roughly 54% are trucks.

How long is I-80 Wbl over Shamrock Road?

The structure is 87 ft (26.5 m) long with a longest span of 32 ft (9.9 m) and a deck 41 ft wide.

Who owns I-80 Wbl over Shamrock Road?

It is owned by the State Highway Agency.