T-556 Great Belt over Trib to Thorn Creek
PoorPosted for loadButler County, Pennsylvania · 0.45 MI NE of SR 2010 · Structure no. 000000000008239
- Built
- 1957
- 68 years old
- Condition
- Poor
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 30 ft
- 1 main span
- Daily traffic
- 200
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
T-556 Great Belt over Trib to Thorn Creek is a steel stringer/multi-beam or girder carrying T-556 Great Belt over Trib to Thorn Creek in Butler County, Pennsylvania. It was built in 1957, so it is 68 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. Its operating status is: posted for load restriction.
It carries about 200 vehicles a day, roughly 9% of them trucks, projected to reach 225 by 2037. The structure is 30 ft (9.1 m) long and 32 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 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was T-556 Great Belt over Trib to Thorn Creek built?
It was built in 1957, making it 68 years old in 2025.
What condition is T-556 Great Belt over Trib to Thorn Creek 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 May 2023.
How much traffic does T-556 Great Belt over Trib to Thorn Creek carry?
About 200 vehicles per day (2017 count), of which roughly 9% are trucks.
How long is T-556 Great Belt over Trib to Thorn Creek?
The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.
Who owns T-556 Great Belt over Trib to Thorn Creek?
It is owned by the County Highway Agency.