I-25 Nbl over Machinery Pass
GoodNatrona County, Wyoming · Casper - Kaycee · Structure no. AIZ
- Built
- 1972
- 53 years old
- Condition
- Good
- inspected April 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 130 ft
- 3 main spans
- Daily traffic
- 2,751
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I-25 Nbl over Machinery Pass is a concrete continuous tee beam carrying I-25 Nbl over Machinery Pass in Natrona County, Wyoming. It was built in 1972, so it is 53 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 2,751 vehicles a day, roughly 25% of them trucks, projected to reach 3,851 by 2043. The structure is 130 ft (39.6 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-25 Nbl over Machinery Pass built?
It was built in 1972, making it 53 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 April 2023.
How much traffic does I-25 Nbl over Machinery Pass carry?
About 2,751 vehicles per day (2024 count), of which roughly 25% are trucks.
How long is I-25 Nbl over Machinery Pass?
The structure is 130 ft (39.6 m) long with a longest span of 56 ft (17.1 m) and a deck 45 ft wide.
Who owns I-25 Nbl over Machinery Pass?
It is owned by the State Highway Agency.