Marsh RD over Drainage
FairDawson County, Montana · 3M S Glendive · Structure no. S00335003+07691
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 93 ft
- 2 main spans
- Daily traffic
- 230
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Marsh RD over Drainage is a prestressed concrete stringer/multi-beam or girder carrying Marsh RD over Drainage in Dawson County, Montana. It was built in 1970, so it is 55 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 230 vehicles a day, roughly 1% of them trucks, projected to reach 242 by 2043. The structure is 93 ft (28.2 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Marsh RD over Drainage built?
It was built in 1970, making it 55 years old in 2025.
What condition is Marsh RD over Drainage 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 December 2024.
How much traffic does Marsh RD over Drainage carry?
About 230 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is Marsh RD over Drainage?
The structure is 93 ft (28.2 m) long with a longest span of 45 ft (13.7 m) and a deck 34 ft wide.
Who owns Marsh RD over Drainage?
It is owned by the State Highway Agency.