T-880 Donegal Lake over Four Mile Run
PoorPosted for loadWestmoreland County, Pennsylvania · 1/4 MI NW of SR 711 · Structure no. 000000000036896
- Built
- 1920
- 105 years old
- Condition
- Poor
- inspected July 2024
- Type
- Arch - Deck
- Concrete
- Length
- 24 ft
- 1 main span
- Daily traffic
- 150
- 2024 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
T-880 Donegal Lake over Four Mile Run is a concrete arch - deck carrying T-880 Donegal Lake over Four Mile Run in Westmoreland County, Pennsylvania. It was built in 1920, so it is 105 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 150 vehicles a day, roughly 5% of them trucks, projected to reach 200 by 2044. The structure is 24 ft (7.3 m) long and 19 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 |
|---|---|---|
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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-880 Donegal Lake over Four Mile Run built?
It was built in 1920, making it 105 years old in 2025.
What condition is T-880 Donegal Lake over Four Mile Run 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 July 2024.
How much traffic does T-880 Donegal Lake over Four Mile Run carry?
About 150 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is T-880 Donegal Lake over Four Mile Run?
The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 19 ft wide.
Who owns T-880 Donegal Lake over Four Mile Run?
It is owned by the Town or Township Highway Agency.