HWY 104 over Power Slough (alder Cr)
GoodClatsop County, Oregon · 023 MI NW of Warrenton · Structure no. 11233B104 00232
- Built
- 1989
- 36 years old
- Condition
- Good
- inspected March 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 63 ft
- 1 main span
- Daily traffic
- 5,825
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
HWY 104 over Power Slough (alder Cr) is a prestressed concrete slab carrying HWY 104 over Power Slough (alder Cr) in Clatsop County, Oregon. It was built in 1989, so it is 36 years old, younger than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 5,825 vehicles a day, roughly 13% of them trucks, projected to reach 6,300 by 2042. The structure is 63 ft (19.2 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY 104 over Power Slough (alder Cr) built?
It was built in 1989, making it 36 years old in 2025.
What condition is HWY 104 over Power Slough (alder Cr) in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.
How much traffic does HWY 104 over Power Slough (alder Cr) carry?
About 5,825 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is HWY 104 over Power Slough (alder Cr)?
The structure is 63 ft (19.2 m) long with a longest span of 63 ft (19.2 m) and a deck 40 ft wide.
Who owns HWY 104 over Power Slough (alder Cr)?
It is owned by the State Highway Agency.