Keir LN over Spokane Creek 143
GoodLewis and Clark County, Montana · 4M SW Canyon Ferry · Structure no. L25010001+06871
- Built
- 2004
- 21 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 40 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Keir LN over Spokane Creek 143 is a steel stringer/multi-beam or girder carrying Keir LN over Spokane Creek 143 in Lewis and Clark County, Montana. It was built in 2004, so it is 21 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 8 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 40 ft (12.3 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Keir LN over Spokane Creek 143 built?
It was built in 2004, making it 21 years old in 2025.
What condition is Keir LN over Spokane Creek 143 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 October 2024.
How much traffic does Keir LN over Spokane Creek 143 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Keir LN over Spokane Creek 143?
The structure is 40 ft (12.3 m) long with a longest span of 39 ft (11.9 m) and a deck 25 ft wide.
Who owns Keir LN over Spokane Creek 143?
It is owned by the County Highway Agency.