Pr 181 17.9 KM over Unknown Creek
PoorSan Lorenzo Municipio, Puerto Rico · 10.4 KM North of Patillas · Structure no. 004151
- Built
- 1940
- 85 years old
- Condition
- Poor
- inspected October 2024
- Type
- Slab
- Concrete Continuous
- Length
- 54 ft
- 3 main spans
- Daily traffic
- 6,300
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
Pr 181 17.9 KM over Unknown Creek is a concrete continuous slab carrying Pr 181 17.9 KM over Unknown Creek in San Lorenzo Municipio, Puerto Rico. It was built in 1940, so it is 85 years old, older than the Puerto Rico average of 51.2 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.
It carries about 6,300 vehicles a day, roughly 4% of them trucks, projected to reach 9,100 by 2025. The structure is 54 ft (16.6 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Pr 181 17.9 KM over Unknown Creek built?
It was built in 1940, making it 85 years old in 2025.
What condition is Pr 181 17.9 KM over Unknown 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 October 2024.
How much traffic does Pr 181 17.9 KM over Unknown Creek carry?
About 6,300 vehicles per day (2017 count), of which roughly 4% are trucks.
How long is Pr 181 17.9 KM over Unknown Creek?
The structure is 54 ft (16.6 m) long with a longest span of 19 ft (5.7 m) and a deck 27 ft wide.
Who owns Pr 181 17.9 KM over Unknown Creek?
It is owned by the State Highway Agency.