US 34 Ml over Big Thompson River
GoodLarimer County, Colorado · 6.5 MI E of Estes Park · Structure no. C-15-U
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 128 ft
- 1 main span
- Daily traffic
- 5,800
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
US 34 Ml over Big Thompson River is a prestressed concrete stringer/multi-beam or girder carrying US 34 Ml over Big Thompson River in Larimer County, Colorado. It was built in 2003, so it is 22 years old, younger than the Colorado average of 42.2 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 5,800 vehicles a day, roughly 2% of them trucks, projected to reach 7,250 by 2040. The structure is 128 ft (39.1 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 34 Ml over Big Thompson River built?
It was built in 2003, making it 22 years old in 2025.
What condition is US 34 Ml over Big Thompson River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.
How much traffic does US 34 Ml over Big Thompson River carry?
About 5,800 vehicles per day (2020 count), of which roughly 2% are trucks.
How long is US 34 Ml over Big Thompson River?
The structure is 128 ft (39.1 m) long with a longest span of 125 ft (38.1 m) and a deck 43 ft wide.
Who owns US 34 Ml over Big Thompson River?
It is owned by the State Highway Agency.