T-684 over Plum Creek
FairNorthumberland County, Pennsylvania · 1.5 MI NW of Seven Points · Structure no. 000000000029360
- Built
- 1989
- 36 years old
- Condition
- Fair
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 41 ft
- 1 main span
- Daily traffic
- 100
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
T-684 over Plum Creek is a prestressed concrete box beam or girders - multiple carrying T-684 over Plum Creek in Northumberland County, Pennsylvania. It was built in 1989, so it is 36 years old, younger 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 6 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 100 vehicles a day, projected to reach 155 by 2039. The structure is 41 ft (12.5 m) long and 28 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was T-684 over Plum Creek built?
It was built in 1989, making it 36 years old in 2025.
What condition is T-684 over Plum Creek 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 February 2024.
How much traffic does T-684 over Plum Creek carry?
About 100 vehicles per day (2018 count).
How long is T-684 over Plum Creek?
The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.6 m) and a deck 28 ft wide.
Who owns T-684 over Plum Creek?
It is owned by the County Highway Agency.