Three Mile DR over N-109
GoodFlathead County, Montana · Kalispell-Three Mile DR · Structure no. U06706000+06001
- Built
- 2014
- 11 years old
- Condition
- Good
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 136 ft
- 2 main spans
- Daily traffic
- 6,086
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Three Mile DR over N-109 is a prestressed concrete stringer/multi-beam or girder carrying Three Mile DR over N-109 in Flathead County, Montana. It was built in 2014, so it is 11 years old, younger than the Montana average of 47 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 6,086 vehicles a day, roughly 1% of them trucks, projected to reach 6,390 by 2043. The structure is 136 ft (41.6 m) long and 73 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Three Mile DR over N-109 built?
It was built in 2014, making it 11 years old in 2025.
What condition is Three Mile DR over N-109 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 January 2025.
How much traffic does Three Mile DR over N-109 carry?
About 6,086 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is Three Mile DR over N-109?
The structure is 136 ft (41.6 m) long with a longest span of 67 ft (20.4 m) and a deck 73 ft wide.
Who owns Three Mile DR over N-109?
It is owned by the State Highway Agency.