HWY 105 over Lewis & Clark River
PoorClatsop County, Oregon · 021 MI S Astoria · Structure no. 00711 105 00478
- Built
- 1924
- 101 years old, rebuilt 2003
- Condition
- Poor
- inspected May 2024
- Type
- Movable - Bascule
- Steel
- Length
- 870 ft
- 1 main span
- Daily traffic
- 6,367
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
HWY 105 over Lewis & Clark River is a steel movable - bascule carrying HWY 105 over Lewis & Clark River in Clatsop County, Oregon. It was built in 1924 and reconstructed in 2003, so it is 101 years old, older than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 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.
It carries about 6,367 vehicles a day, roughly 14% of them trucks, projected to reach 9,000 by 2042. The structure is 870 ft (265.2 m) long and 26 ft wide. If it were closed, the detour would be 5.6 mi (9 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY 105 over Lewis & Clark River built?
It was built in 1924, making it 101 years old in 2025. It was reconstructed in 2003.
What condition is HWY 105 over Lewis & Clark 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 May 2024.
How much traffic does HWY 105 over Lewis & Clark River carry?
About 6,367 vehicles per day (2022 count), of which roughly 14% are trucks.
How long is HWY 105 over Lewis & Clark River?
The structure is 870 ft (265.2 m) long with a longest span of 112 ft (34.1 m) and a deck 26 ft wide.
Who owns HWY 105 over Lewis & Clark River?
It is owned by the State Highway Agency.