S 366-LEDGER RD over Int Ledger-I 15
FairPondera County, Montana · 6M N Conrad · Structure no. S00366000+00001
- Built
- 1972
- 53 years old
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 292 ft
- 4 main spans
- Daily traffic
- 187
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 366-LEDGER RD over Int Ledger-I 15 is a prestressed concrete stringer/multi-beam or girder carrying S 366-LEDGER RD over Int Ledger-I 15 in Pondera County, Montana. It was built in 1972, so it is 53 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 187 vehicles a day, roughly 4% of them trucks, projected to reach 196 by 2043. The structure is 292 ft (89 m) long and 34 ft wide.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 366-LEDGER RD over Int Ledger-I 15 built?
It was built in 1972, making it 53 years old in 2025.
What condition is S 366-LEDGER RD over Int Ledger-I 15 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 March 2024.
How much traffic does S 366-LEDGER RD over Int Ledger-I 15 carry?
About 187 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is S 366-LEDGER RD over Int Ledger-I 15?
The structure is 292 ft (89 m) long with a longest span of 95 ft (29 m) and a deck 34 ft wide.
Who owns S 366-LEDGER RD over Int Ledger-I 15?
It is owned by the State Highway Agency.