US 18 over Old Woman Creek
FairNiobrara County, Wyoming · Lusk - Newcastle · Structure no. FEW
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 145 ft
- 3 main spans
- Daily traffic
- 2,150
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US 18 over Old Woman Creek is a steel continuous stringer/multi-beam or girder carrying US 18 over Old Woman Creek in Niobrara County, Wyoming. It was built in 1987, so it is 38 years old, younger 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 5 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 2,150 vehicles a day, roughly 21% of them trucks, projected to reach 3,010 by 2043. The structure is 145 ft (44.2 m) long and 43 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 US 18 over Old Woman Creek built?
It was built in 1987, making it 38 years old in 2025.
What condition is US 18 over Old Woman Creek 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 2023.
How much traffic does US 18 over Old Woman Creek carry?
About 2,150 vehicles per day (2024 count), of which roughly 21% are trucks.
How long is US 18 over Old Woman Creek?
The structure is 145 ft (44.2 m) long with a longest span of 56 ft (17.1 m) and a deck 43 ft wide.
Who owns US 18 over Old Woman Creek?
It is owned by the State Highway Agency.