Wyo 31 over Nowood River
FairBig Horn County, Wyoming · Manderson - Hyattville · Structure no. CJG
- Built
- 1952
- 73 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 148 ft
- 3 main spans
- Daily traffic
- 487
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Wyo 31 over Nowood River is a steel continuous stringer/multi-beam or girder carrying Wyo 31 over Nowood River in Big Horn County, Wyoming. It was built in 1952, so it is 73 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 487 vehicles a day, roughly 6% of them trucks, projected to reach 682 by 2043. The structure is 148 ft (45 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Wyo 31 over Nowood River built?
It was built in 1952, making it 73 years old in 2025.
What condition is Wyo 31 over Nowood River 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 May 2024.
How much traffic does Wyo 31 over Nowood River carry?
About 487 vehicles per day (2024 count), of which roughly 6% are trucks.
How long is Wyo 31 over Nowood River?
The structure is 148 ft (45 m) long with a longest span of 56 ft (17.1 m) and a deck 28 ft wide.
Who owns Wyo 31 over Nowood River?
It is owned by the State Highway Agency.