US Highway 1A over Mill River
FairWashington County, Maine · Milbridge/Harrngton T.L. · Structure no. 3658
- Built
- 1942
- 83 years old, rebuilt 1997
- Condition
- Fair
- inspected September 2023
- Type
- Slab
- Concrete
- Length
- 67 ft
- 1 main span
- Daily traffic
- 3,461
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 1A over Mill River is a concrete slab carrying US Highway 1A over Mill River in Washington County, Maine. It was built in 1942 and reconstructed in 1997, so it is 83 years old, older than the Maine average of 53.7 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 3,461 vehicles a day, roughly 5% of them trucks, projected to reach 4,845 by 2036. The structure is 67 ft (20.4 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 US Highway 1A over Mill River built?
It was built in 1942, making it 83 years old in 2025. It was reconstructed in 1997.
What condition is US Highway 1A over Mill 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 September 2023.
How much traffic does US Highway 1A over Mill River carry?
About 3,461 vehicles per day (2016 count), of which roughly 5% are trucks.
How long is US Highway 1A over Mill River?
The structure is 67 ft (20.4 m) long with a longest span of 23 ft (7 m) and a deck 37 ft wide.
Who owns US Highway 1A over Mill River?
It is owned by the State Highway Agency.