T-409 Mifflin BR#1 over Ten Mile Run
FairPosted for loadColumbia County, Pennsylvania · 2.1 M.Ssw of Mifflinville · Structure no. 000000000012825
- Built
- 1940
- 85 years old, rebuilt 1982
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 43 ft
- 1 main span
- Daily traffic
- 120
- 2024 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
T-409 Mifflin BR#1 over Ten Mile Run is a steel stringer/multi-beam or girder carrying T-409 Mifflin BR#1 over Ten Mile Run in Columbia County, Pennsylvania. It was built in 1940 and reconstructed in 1982, so it is 85 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. Its operating status is: posted for load restriction.
It carries about 120 vehicles a day, roughly 5% of them trucks, projected to reach 186 by 2046. The structure is 43 ft (13.1 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| 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 T-409 Mifflin BR#1 over Ten Mile Run built?
It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1982.
What condition is T-409 Mifflin BR#1 over Ten Mile 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 April 2023.
How much traffic does T-409 Mifflin BR#1 over Ten Mile Run carry?
About 120 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is T-409 Mifflin BR#1 over Ten Mile Run?
The structure is 43 ft (13.1 m) long with a longest span of 41 ft (12.5 m) and a deck 25 ft wide.
Who owns T-409 Mifflin BR#1 over Ten Mile Run?
It is owned by the Town or Township Highway Agency.