SH 318 Ml over Yampa River
FairMoffat County, Colorado · 5.7 MI NW of Maybell · Structure no. B-04-D
- Built
- 1952
- 73 years old
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 285 ft
- 4 main spans
- Daily traffic
- 230
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
SH 318 Ml over Yampa River is a steel continuous stringer/multi-beam or girder carrying SH 318 Ml over Yampa River in Moffat County, Colorado. It was built in 1952, so it is 73 years old, older than the Colorado average of 42.2 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 230 vehicles a day, roughly 7% of them trucks, projected to reach 306 by 2040. The structure is 285 ft (87 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 SH 318 Ml over Yampa River built?
It was built in 1952, making it 73 years old in 2025.
What condition is SH 318 Ml over Yampa 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 October 2024.
How much traffic does SH 318 Ml over Yampa River carry?
About 230 vehicles per day (2020 count), of which roughly 7% are trucks.
How long is SH 318 Ml over Yampa River?
The structure is 285 ft (87 m) long with a longest span of 77 ft (23.6 m) and a deck 28 ft wide.
Who owns SH 318 Ml over Yampa River?
It is owned by the State Highway Agency.