Jo Cnty RD 78 over Middle Fork Powder River
PoorPosted for loadJohnson County, Wyoming · 11 Miles N. of Barnum · Structure no. FNV
- Built
- 1989
- 36 years old
- Condition
- Poor
- inspected March 2024
- Type
- Truss - Thru
- Steel
- Length
- 59 ft
- 1 main span
- Daily traffic
- 13
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
Jo Cnty RD 78 over Middle Fork Powder River is a steel truss - thru carrying Jo Cnty RD 78 over Middle Fork Powder River in Johnson County, Wyoming. It was built in 1989, so it is 36 years old, younger 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 3 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 13 vehicles a day, roughly 15% of them trucks, projected to reach 18 by 2043. The structure is 59 ft (18 m) long and 25 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 Jo Cnty RD 78 over Middle Fork Powder River built?
It was built in 1989, making it 36 years old in 2025.
What condition is Jo Cnty RD 78 over Middle Fork Powder 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 March 2024.
How much traffic does Jo Cnty RD 78 over Middle Fork Powder River carry?
About 13 vehicles per day (2024 count), of which roughly 15% are trucks.
How long is Jo Cnty RD 78 over Middle Fork Powder River?
The structure is 59 ft (18 m) long with a longest span of 57 ft (17.4 m) and a deck 25 ft wide.
Who owns Jo Cnty RD 78 over Middle Fork Powder River?
It is owned by the County Highway Agency.