Logan Trident RD over Gallatin River 008
FairGallatin County, Montana · 1M W Logan · Structure no. L16200000+01001
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 200 ft
- 3 main spans
- Daily traffic
- 1,328
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Logan Trident RD over Gallatin River 008 is a prestressed concrete stringer/multi-beam or girder carrying Logan Trident RD over Gallatin River 008 in Gallatin County, Montana. It was built in 1964, so it is 61 years old, older than the Montana average of 47 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 1,328 vehicles a day, roughly 3% of them trucks, projected to reach 1,421 by 2043. The structure is 200 ft (61 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Logan Trident RD over Gallatin River 008 built?
It was built in 1964, making it 61 years old in 2025.
What condition is Logan Trident RD over Gallatin River 008 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 Logan Trident RD over Gallatin River 008 carry?
About 1,328 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Logan Trident RD over Gallatin River 008?
The structure is 200 ft (61 m) long with a longest span of 65 ft (19.8 m) and a deck 31 ft wide.
Who owns Logan Trident RD over Gallatin River 008?
It is owned by the County Highway Agency.