Stp 8213;MIDDLETON over Caldwell Highline Canal
FairCanyon County, Idaho · 4.0 S. 0.3 E. Middleton · Structure no. 000000000019715
- Built
- 1950
- 75 years old, rebuilt 1969
- Condition
- Fair
- inspected March 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 24 ft
- 1 main span
- Daily traffic
- 8,900
- 2023 count
- Owner
- Local
- Other Local Agency
About this bridge
Stp 8213;MIDDLETON over Caldwell Highline Canal is a prestressed concrete tee beam carrying Stp 8213;MIDDLETON over Caldwell Highline Canal in Canyon County, Idaho. It was built in 1950 and reconstructed in 1969, so it is 75 years old, older than the Idaho average of 45.3 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 8,900 vehicles a day, roughly 4% of them trucks, projected to reach 13,350 by 2042. The structure is 24 ft (7.3 m) long and 66 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Stp 8213;MIDDLETON over Caldwell Highline Canal built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1969.
What condition is Stp 8213;MIDDLETON over Caldwell Highline Canal 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 March 2023.
How much traffic does Stp 8213;MIDDLETON over Caldwell Highline Canal carry?
About 8,900 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Stp 8213;MIDDLETON over Caldwell Highline Canal?
The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 66 ft wide.
Who owns Stp 8213;MIDDLETON over Caldwell Highline Canal?
It is owned by the Other Local Agency.