US 287 over Flat Creek
GoodLewis and Clark County, Montana · 14M SE Augusta · Structure no. P00009023+05901
- Built
- 2007
- 18 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 73 ft
- 1 main span
- Daily traffic
- 429
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 287 over Flat Creek is a steel stringer/multi-beam or girder carrying US 287 over Flat Creek in Lewis and Clark County, Montana. It was built in 2007, so it is 18 years old, younger 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 429 vehicles a day, roughly 6% of them trucks, projected to reach 450 by 2043. The structure is 73 ft (22.3 m) long and 38 ft wide. If it were closed, the detour would be 60.9 mi (98 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 287 over Flat Creek built?
It was built in 2007, making it 18 years old in 2025.
What condition is US 287 over Flat Creek 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 September 2023.
How much traffic does US 287 over Flat Creek carry?
About 429 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is US 287 over Flat Creek?
The structure is 73 ft (22.3 m) long with a longest span of 72 ft (22 m) and a deck 38 ft wide.
Who owns US 287 over Flat Creek?
It is owned by the State Highway Agency.