US Bridges

I-25 Sbl over Machinery Pass

Fair

Converse County, Wyoming · Douglas - Casper · Structure no. AHE

Built
1967
58 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
4,838
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Sbl over Machinery Pass is a concrete continuous tee beam carrying I-25 Sbl over Machinery Pass in Converse County, Wyoming. It was built in 1967, so it is 58 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 4,838 vehicles a day, roughly 17% of them trucks, projected to reach 6,773 by 2043. The structure is 62 ft (18.9 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-25 Sbl
CrossesMachinery Pass
LocationDouglas - Casper
RouteInterstate 25
StateWyoming
Coordinates42.83696, -105.86755
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.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
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 rating35.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length62 ft (18.9 m)
Longest span24 ft (7.2 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,838 (2024)
Projected traffic6,773 by 2043
Trucks17%
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-25 Sbl over Machinery Pass built?

It was built in 1967, making it 58 years old in 2025.

What condition is I-25 Sbl 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-25 Sbl over Machinery Pass carry?

About 4,838 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is I-25 Sbl over Machinery Pass?

The structure is 62 ft (18.9 m) long with a longest span of 24 ft (7.2 m) and a deck 41 ft wide.

Who owns I-25 Sbl over Machinery Pass?

It is owned by the State Highway Agency.