T-406 Mill Road over Blair Gap Run
FairBlair County, Pennsylvania · 1 Mi.W.Of Duncansville · Structure no. 000000000005889
- Built
- 1958
- 67 years old, rebuilt 2014
- Condition
- Fair
- inspected September 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 44 ft
- 1 main span
- Daily traffic
- 684
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
T-406 Mill Road over Blair Gap Run is a prestressed concrete box beam or girders - multiple carrying T-406 Mill Road over Blair Gap Run in Blair County, Pennsylvania. It was built in 1958 and reconstructed in 2014, so it is 67 years old, older than the Pennsylvania average of 54.8 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 684 vehicles a day, roughly 1% of them trucks, projected to reach 855 by 2044. The structure is 44 ft (13.4 m) long and 22 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 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 T-406 Mill Road over Blair Gap Run built?
It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2014.
What condition is T-406 Mill Road over Blair Gap Run 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 2024.
How much traffic does T-406 Mill Road over Blair Gap Run carry?
About 684 vehicles per day (2024 count), of which roughly 1% are trucks.
How long is T-406 Mill Road over Blair Gap Run?
The structure is 44 ft (13.4 m) long with a longest span of 43 ft (13.1 m) and a deck 22 ft wide.
Who owns T-406 Mill Road over Blair Gap Run?
It is owned by the County Highway Agency.