Alderbrook Loop over Kilchis River
FairTillamook County, Oregon · 0030 East on Alderbrook · Structure no. 00455A065600030
- Built
- 1989
- 36 years old
- Condition
- Fair
- inspected August 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 173 ft
- 1 main span
- Daily traffic
- 2,546
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Alderbrook Loop over Kilchis River is a prestressed concrete tee beam carrying Alderbrook Loop over Kilchis River in Tillamook 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 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 2,546 vehicles a day, roughly 15% of them trucks, projected to reach 3,026 by 2025. The structure is 173 ft (52.7 m) long and 36 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Alderbrook Loop over Kilchis River built?
It was built in 1989, making it 36 years old in 2025.
What condition is Alderbrook Loop over Kilchis River 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 August 2024.
How much traffic does Alderbrook Loop over Kilchis River carry?
About 2,546 vehicles per day (2020 count), of which roughly 15% are trucks.
How long is Alderbrook Loop over Kilchis River?
The structure is 173 ft (52.7 m) long with a longest span of 136 ft (41.5 m) and a deck 36 ft wide.
Who owns Alderbrook Loop over Kilchis River?
It is owned by the County Highway Agency.