US Bridges

I-25 Nbl over Machinery Pass

Good

Platte County, Wyoming · Wheatland - Glendo · Structure no. AEV

Built
1960
65 years old
Condition
Good
inspected March 2023
Type
Slab
Concrete Continuous
Length
68 ft
3 main spans
Daily traffic
3,602
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over Machinery Pass is a concrete continuous slab carrying I-25 Nbl over Machinery Pass in Platte 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,602 vehicles a day, roughly 24% of them trucks, projected to reach 5,043 by 2043. The structure is 68 ft (20.6 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-25 Nbl
CrossesMachinery Pass
LocationWheatland - Glendo
RouteInterstate 25
StateWyoming
Coordinates42.31595, -105.04633
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 rating49.1 US tons
Inventory rating29.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length68 ft (20.6 m)
Longest span25 ft (7.6 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,602 (2024)
Projected traffic5,043 by 2043
Trucks24%
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 Nbl over Machinery Pass built?

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

What condition is I-25 Nbl over Machinery Pass in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does I-25 Nbl over Machinery Pass carry?

About 3,602 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is I-25 Nbl over Machinery Pass?

The structure is 68 ft (20.6 m) long with a longest span of 25 ft (7.6 m) and a deck 41 ft wide.

Who owns I-25 Nbl over Machinery Pass?

It is owned by the State Highway Agency.