IRR - US 93 over Dayton Creek
FairLake County, Montana · Dayton · Structure no. P00005082+03541
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 71 ft
- 1 main span
- Daily traffic
- 5,161
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - US 93 over Dayton Creek is a prestressed concrete stringer/multi-beam or girder carrying IRR - US 93 over Dayton Creek in Lake County, Montana. It was built in 1987, so it is 38 years old, younger 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.
It carries about 5,161 vehicles a day, roughly 5% of them trucks, projected to reach 5,625 by 2043. The structure is 71 ft (21.6 m) long and 42 ft wide. If it were closed, the detour would be 36 mi (58 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 | 7 Good | Some minor problems. |
| 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 IRR - US 93 over Dayton Creek built?
It was built in 1987, making it 38 years old in 2025.
What condition is IRR - US 93 over Dayton Creek 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 IRR - US 93 over Dayton Creek carry?
About 5,161 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is IRR - US 93 over Dayton Creek?
The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 42 ft wide.
Who owns IRR - US 93 over Dayton Creek?
It is owned by the State Highway Agency.