Boston Mill RD over Overflow
PoorLinn County, Oregon · 005MI East Shedd · Structure no. 13557 001300557
- Built
- 1977
- 48 years old
- Condition
- Poor
- inspected October 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 252 ft
- 7 main spans
- Daily traffic
- 542
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Boston Mill RD over Overflow is a prestressed concrete slab carrying Boston Mill RD over Overflow in Linn County, Oregon. It was built in 1977, so it is 48 years old, younger 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 3 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. Its operating status is: open, would be posted or closed except for temporary shoring.
It carries about 542 vehicles a day, roughly 18% of them trucks, projected to reach 649 by 2041. The structure is 252 ft (76.8 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Boston Mill RD over Overflow built?
It was built in 1977, making it 48 years old in 2025.
What condition is Boston Mill RD over Overflow 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 October 2024.
How much traffic does Boston Mill RD over Overflow carry?
About 542 vehicles per day (2021 count), of which roughly 18% are trucks.
How long is Boston Mill RD over Overflow?
The structure is 252 ft (76.8 m) long with a longest span of 36 ft (11 m) and a deck 32 ft wide.
Who owns Boston Mill RD over Overflow?
It is owned by the County Highway Agency.