SH 9 Ml over Blue River
FairSummit County, Colorado · In Silverthorne · Structure no. F-12-BP
- Built
- 1982
- 43 years old
- Condition
- Fair
- inspected August 2023
- Type
- Culvert
- Concrete
- Length
- 69 ft
- 5 main spans
- Daily traffic
- 20,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
SH 9 Ml over Blue River is a concrete culvert carrying SH 9 Ml over Blue River in Summit County, Colorado. It was built in 1982, so it is 43 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 20,000 vehicles a day, roughly 6% of them trucks, projected to reach 24,800 by 2040. The structure is 69 ft (21 m) long and 138 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 9 Ml over Blue River built?
It was built in 1982, making it 43 years old in 2025.
What condition is SH 9 Ml over Blue 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 August 2023.
How much traffic does SH 9 Ml over Blue River carry?
About 20,000 vehicles per day (2020 count), of which roughly 6% are trucks.
How long is SH 9 Ml over Blue River?
The structure is 69 ft (21 m) long with a longest span of 14 ft (4.3 m) and a deck 138 ft wide.
Who owns SH 9 Ml over Blue River?
It is owned by the State Highway Agency.