Stemple Pass RD over Blackfoot River 118
FairLewis and Clark County, Montana · .5M S Lincoln · Structure no. L25500000+07001
- Built
- 1959
- 66 years old
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 124 ft
- 3 main spans
- Daily traffic
- 301
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Stemple Pass RD over Blackfoot River 118 is a concrete continuous tee beam carrying Stemple Pass RD over Blackfoot River 118 in Lewis and Clark County, Montana. It was built in 1959, so it is 66 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 301 vehicles a day, roughly 3% of them trucks, projected to reach 318 by 2043. The structure is 124 ft (37.8 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Stemple Pass RD over Blackfoot River 118 built?
It was built in 1959, making it 66 years old in 2025.
What condition is Stemple Pass RD over Blackfoot River 118 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 September 2024.
How much traffic does Stemple Pass RD over Blackfoot River 118 carry?
About 301 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Stemple Pass RD over Blackfoot River 118?
The structure is 124 ft (37.8 m) long with a longest span of 80 ft (24.4 m) and a deck 27 ft wide.
Who owns Stemple Pass RD over Blackfoot River 118?
It is owned by the County Highway Agency.