20th RD NE over Sep I 15 001
GoodTeton County, Montana · 4M N Dutton · Structure no. L50069002+07001
- Built
- 1977
- 48 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 298 ft
- 4 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- State
- State Highway Agency
About this bridge
20th RD NE over Sep I 15 001 is a prestressed concrete stringer/multi-beam or girder carrying 20th RD NE over Sep I 15 001 in Teton County, Montana. It was built in 1977, so it is 48 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 298 ft (90.8 m) long and 30 ft wide. If it were closed, the detour would be 16.8 mi (27 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 20th RD NE over Sep I 15 001 built?
It was built in 1977, making it 48 years old in 2025.
What condition is 20th RD NE over Sep I 15 001 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.
How much traffic does 20th RD NE over Sep I 15 001 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is 20th RD NE over Sep I 15 001?
The structure is 298 ft (90.8 m) long with a longest span of 107 ft (32.6 m) and a deck 30 ft wide.
Who owns 20th RD NE over Sep I 15 001?
It is owned by the State Highway Agency.