SH 9 Ml over Blue River
FairSummit County, Colorado · 13.5 MI No of JCT I 70 · Structure no. E-12-H
- Built
- 1957
- 68 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 135 ft
- 3 main spans
- Daily traffic
- 3,400
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
SH 9 Ml over Blue River is a steel continuous stringer/multi-beam or girder carrying SH 9 Ml over Blue River in Summit County, Colorado. It was built in 1957, so it is 68 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 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 3,400 vehicles a day, roughly 9% of them trucks, projected to reach 4,148 by 2040. The structure is 135 ft (41.3 m) long and 34 ft wide. If it were closed, the detour would be 60.9 mi (98 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 9 Ml over Blue River built?
It was built in 1957, making it 68 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 3,400 vehicles per day (2020 count), of which roughly 9% are trucks.
How long is SH 9 Ml over Blue River?
The structure is 135 ft (41.3 m) long with a longest span of 51 ft (15.5 m) and a deck 34 ft wide.
Who owns SH 9 Ml over Blue River?
It is owned by the State Highway Agency.