Sundance Bench RD over Madison River 046
FairPosted for loadMadison County, Montana · 31M S Ennis · Structure no. L29220000+01001
- Built
- 1902
- 123 years old, rebuilt 2005
- Condition
- Fair
- inspected June 2024
- Type
- Truss - Thru
- Steel
- Length
- 300 ft
- 3 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Sundance Bench RD over Madison River 046 is a steel truss - thru carrying Sundance Bench RD over Madison River 046 in Madison County, Montana. It was built in 1902 and reconstructed in 2005, so it is 123 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 300 ft (91.5 m) long and 15 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Sundance Bench RD over Madison River 046 built?
It was built in 1902, making it 123 years old in 2025. It was reconstructed in 2005.
What condition is Sundance Bench RD over Madison River 046 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 June 2024.
How much traffic does Sundance Bench RD over Madison River 046 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Sundance Bench RD over Madison River 046?
The structure is 300 ft (91.5 m) long with a longest span of 100 ft (30.5 m) and a deck 15 ft wide.
Who owns Sundance Bench RD over Madison River 046?
It is owned by the County Highway Agency.