US Bridges

I-80 Wbl over Machinery Pass

FairPosted for load

Laramie County, Wyoming · Laramie - Cheyenne · Structure no. AYQ

Built
1961
64 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
70 ft
3 main spans
Daily traffic
7,355
2024 count
Owner
State
State Highway Agency

About this bridge

I-80 Wbl over Machinery Pass is a concrete continuous slab carrying I-80 Wbl over Machinery Pass in Laramie County, Wyoming. It was built in 1961, so it is 64 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 7,355 vehicles a day, roughly 49% of them trucks, projected to reach 10,297 by 2043. The structure is 70 ft (21.4 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-80 Wbl
CrossesMachinery Pass
LocationLaramie - Cheyenne
RouteInterstate 80
CountyLaramie County
StateWyoming
Coordinates41.11324, -104.93343
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 inspectionMarch 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 rating50.7 US tons
Inventory rating30.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length70 ft (21.4 m)
Longest span26 ft (8 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,355 (2024)
Projected traffic10,297 by 2043
Trucks49%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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 Machinery Pass built?

It was built in 1961, making it 64 years old in 2025.

What condition is I-80 Wbl over Machinery Pass 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 2024.

How much traffic does I-80 Wbl over Machinery Pass carry?

About 7,355 vehicles per day (2024 count), of which roughly 49% are trucks.

How long is I-80 Wbl over Machinery Pass?

The structure is 70 ft (21.4 m) long with a longest span of 26 ft (8 m) and a deck 41 ft wide.

Who owns I-80 Wbl over Machinery Pass?

It is owned by the State Highway Agency.