HWY 140 over Jackson Bottom Slough
PoorWashington County, Oregon · 0.9 MI N of HWY 29 · Structure no. 04962A140 00102
- Built
- 1966
- 59 years old
- Condition
- Poor
- inspected April 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 152 ft
- 8 main spans
- Daily traffic
- 8,728
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
HWY 140 over Jackson Bottom Slough is a prestressed concrete slab carrying HWY 140 over Jackson Bottom Slough in Washington County, Oregon. It was built in 1966, so it is 59 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 8,728 vehicles a day, roughly 7% of them trucks, projected to reach 11,900 by 2042. The structure is 152 ft (46.3 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 HWY 140 over Jackson Bottom Slough built?
It was built in 1966, making it 59 years old in 2025.
What condition is HWY 140 over Jackson Bottom Slough 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 April 2024.
How much traffic does HWY 140 over Jackson Bottom Slough carry?
About 8,728 vehicles per day (2022 count), of which roughly 7% are trucks.
How long is HWY 140 over Jackson Bottom Slough?
The structure is 152 ft (46.3 m) long with a longest span of 19 ft (5.8 m) and a deck 37 ft wide.
Who owns HWY 140 over Jackson Bottom Slough?
It is owned by the State Highway Agency.