Millegan RD over Smith River
FairPosted for loadCascade County, Montana · 5M SE Ulm · Structure no. S00330005+00001
- Built
- 1950
- 75 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 130 ft
- 2 main spans
- Daily traffic
- 294
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Millegan RD over Smith River is a steel continuous stringer/multi-beam or girder carrying Millegan RD over Smith River in Cascade County, Montana. It was built in 1950, so it is 75 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 294 vehicles a day, roughly 3% of them trucks, projected to reach 309 by 2043. The structure is 130 ft (39.6 m) long and 27 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 | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Millegan RD over Smith River built?
It was built in 1950, making it 75 years old in 2025.
What condition is Millegan RD over Smith River 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 May 2023.
How much traffic does Millegan RD over Smith River carry?
About 294 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Millegan RD over Smith River?
The structure is 130 ft (39.6 m) long with a longest span of 65 ft (19.8 m) and a deck 27 ft wide.
Who owns Millegan RD over Smith River?
It is owned by the State Highway Agency.