US Bridges

I-90 Wbl over Machinery Pass

Fair

Johnson County, Wyoming · Buffalo - Gillette · Structure no. BDQ

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
61 ft
3 main spans
Daily traffic
2,255
2024 count
Owner
State
State Highway Agency

About this bridge

I-90 Wbl over Machinery Pass is a concrete continuous slab carrying I-90 Wbl over Machinery Pass 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 2,255 vehicles a day, roughly 18% of them trucks, projected to reach 3,157 by 2043. The structure is 61 ft (18.6 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-90 Wbl
CrossesMachinery Pass
LocationBuffalo - Gillette
RouteInterstate 90
CountyJohnson County
StateWyoming
Coordinates44.28431, -106.57946
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 inspectionAugust 2023
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 rating40.3 US tons
Inventory rating24.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length61 ft (18.6 m)
Longest span23 ft (6.9 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,255 (2024)
Projected traffic3,157 by 2043
Trucks18%
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-90 Wbl over Machinery Pass built?

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

What condition is I-90 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 August 2023.

How much traffic does I-90 Wbl over Machinery Pass carry?

About 2,255 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is I-90 Wbl over Machinery Pass?

The structure is 61 ft (18.6 m) long with a longest span of 23 ft (6.9 m) and a deck 41 ft wide.

Who owns I-90 Wbl over Machinery Pass?

It is owned by the State Highway Agency.