Wyo 31 over Nowood River
PoorPosted for loadBig Horn County, Wyoming · Manderson - Hyattville · Structure no. BLN
- Built
- 1951
- 74 years old
- Condition
- Poor
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 139 ft
- 3 main spans
- Daily traffic
- 688
- 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 1951, so it is 74 years old, older than the Wyoming average of 48.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 688 vehicles a day, roughly 9% of them trucks, projected to reach 963 by 2043. The structure is 139 ft (42.4 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Wyo 31 over Nowood River built?
It was built in 1951, making it 74 years old in 2025.
What condition is Wyo 31 over Nowood River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.
How much traffic does Wyo 31 over Nowood River carry?
About 688 vehicles per day (2024 count), of which roughly 9% are trucks.
How long is Wyo 31 over Nowood River?
The structure is 139 ft (42.4 m) long with a longest span of 52 ft (15.9 m) and a deck 28 ft wide.
Who owns Wyo 31 over Nowood River?
It is owned by the State Highway Agency.