Placid Lake RD over Owl Creek 077
PoorMissoula County, Montana · 3M S Seeley Lake · Structure no. L32400000+08001
- Built
- 1970
- 55 years old
- Condition
- Poor
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 37 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Placid Lake RD over Owl Creek 077 is a wood or timber stringer/multi-beam or girder carrying Placid Lake RD over Owl Creek 077 in Missoula County, Montana. It was built in 1970, so it is 55 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, posting recommended but not legally implemented.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 37 ft (11.4 m) long and 26 ft wide. If it were closed, the detour would be 16.2 mi (26 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Placid Lake RD over Owl Creek 077 built?
It was built in 1970, making it 55 years old in 2025.
What condition is Placid Lake RD over Owl Creek 077 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.
How much traffic does Placid Lake RD over Owl Creek 077 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Placid Lake RD over Owl Creek 077?
The structure is 37 ft (11.4 m) long with a longest span of 36 ft (11.1 m) and a deck 26 ft wide.
Who owns Placid Lake RD over Owl Creek 077?
It is owned by the County Highway Agency.