Stc 3851;HEXON RD over Boise River
PoorClosed to trafficCanyon County, Idaho · 0.4 S. 1.2 W. Parma · Structure no. 000000000027415
- Built
- 1954
- 71 years old, rebuilt 2017
- Condition
- Poor
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 331 ft
- 11 main spans
- Daily traffic
- 560
- 2023 count
- Owner
- Local
- Other Local Agency
About this bridge
Stc 3851;HEXON RD over Boise River is a concrete stringer/multi-beam or girder carrying Stc 3851;HEXON RD over Boise River in Canyon County, Idaho. It was built in 1954 and reconstructed in 2017, so it is 71 years old, older than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 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: closed to all traffic.
It carries about 560 vehicles a day, roughly 24% of them trucks, projected to reach 840 by 2042. The structure is 331 ft (100.9 m) long and 25 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 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Stc 3851;HEXON RD over Boise River built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 2017.
What condition is Stc 3851;HEXON RD over Boise River 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 2024.
How much traffic does Stc 3851;HEXON RD over Boise River carry?
About 560 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is Stc 3851;HEXON RD over Boise River?
The structure is 331 ft (100.9 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.
Who owns Stc 3851;HEXON RD over Boise River?
It is owned by the Other Local Agency.