Ni Cnty RD 9 over Cheyenne River
PoorPosted for loadNiobrara County, Wyoming · 6 Mi. N.E.Of Mule Crk JCT · Structure no. DSD
- Built
- 1920
- 105 years old, rebuilt 1960
- Condition
- Poor
- inspected November 2024
- Type
- Truss - Thru
- Steel
- Length
- 133 ft
- 1 main span
- Daily traffic
- 3
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
Ni Cnty RD 9 over Cheyenne River is a steel truss - thru carrying Ni Cnty RD 9 over Cheyenne River in Niobrara County, Wyoming. It was built in 1920 and reconstructed in 1960, so it is 105 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 3 vehicles a day, roughly 33% of them trucks, projected to reach 4 by 2043. The structure is 133 ft (40.5 m) long and 18 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 Ni Cnty RD 9 over Cheyenne River built?
It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1960.
What condition is Ni Cnty RD 9 over Cheyenne 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 November 2024.
How much traffic does Ni Cnty RD 9 over Cheyenne River carry?
About 3 vehicles per day (2024 count), of which roughly 33% are trucks.
How long is Ni Cnty RD 9 over Cheyenne River?
The structure is 133 ft (40.5 m) long with a longest span of 131 ft (39.9 m) and a deck 18 ft wide.
Who owns Ni Cnty RD 9 over Cheyenne River?
It is owned by the County Highway Agency.