SH 55 over Dry Creek
FairAda County, Idaho · 8.1 NW Boise Wcl · Structure no. 000000000014756
- Built
- 1997
- 28 years old
- Condition
- Fair
- inspected November 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 63 ft
- 1 main span
- Daily traffic
- 13,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 55 over Dry Creek is a prestressed concrete stringer/multi-beam or girder carrying SH 55 over Dry Creek in Ada County, Idaho. It was built in 1997, so it is 28 years old, younger 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 13,500 vehicles a day, roughly 6% of them trucks, projected to reach 20,250 by 2042. The structure is 63 ft (19.2 m) long and 87 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 55 over Dry Creek built?
It was built in 1997, making it 28 years old in 2025.
What condition is SH 55 over Dry Creek 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 November 2021.
How much traffic does SH 55 over Dry Creek carry?
About 13,500 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is SH 55 over Dry Creek?
The structure is 63 ft (19.2 m) long with a longest span of 59 ft (18 m) and a deck 87 ft wide.
Who owns SH 55 over Dry Creek?
It is owned by the State Highway Agency.