US-1 Bypass (nb) over Mill Road (T-432)
PoorChester County, Pennsylvania · NW Kennett Square 47C4 · Structure no. 000000000009912
- Built
- 1965
- 60 years old
- Condition
- Poor
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 105 ft
- 3 main spans
- Daily traffic
- 16,272
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US-1 Bypass (nb) over Mill Road (T-432) is a prestressed concrete box beam or girders - multiple carrying US-1 Bypass (nb) over Mill Road (T-432) in Chester County, Pennsylvania. It was built in 1965, so it is 60 years old, older than the Pennsylvania average of 54.8 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 16,272 vehicles a day, roughly 4% of them trucks, projected to reach 18,446 by 2032. The structure is 105 ft (32 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-1 Bypass (nb) over Mill Road (T-432) built?
It was built in 1965, making it 60 years old in 2025.
What condition is US-1 Bypass (nb) over Mill Road (T-432) 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 March 2024.
How much traffic does US-1 Bypass (nb) over Mill Road (T-432) carry?
About 16,272 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is US-1 Bypass (nb) over Mill Road (T-432)?
The structure is 105 ft (32 m) long with a longest span of 42 ft (12.8 m) and a deck 46 ft wide.
Who owns US-1 Bypass (nb) over Mill Road (T-432)?
It is owned by the State Highway Agency.