Pr 52 Southbound over Pr 536
Santa Isabel Municipio, Puerto Rico · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Pr 52 Southbound over Pr 536 in Santa Isabel Municipio, Puerto Rico, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 13,950 vehicles a day (traffic count year 2017).
- It is one of 9 of the 13 inventoried bridges in Santa Isabel Municipio rated fair (69.2%); 3 (23.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated May 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (18.02832, -66.42095)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 102 ft |
| Location | 7 Km N W of Santa Isabel |
| NBI structure number | 011612 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Puerto Rico department of transportation.
Busiest bridges in Santa Isabel Municipio
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Pr 52 Northbound over Pr 153 | 1971 | 41,200 | Fair |
| Pr 52 Northbound over Dirt Road | 1971 | 20,750 | Fair |
| Pr 52 Southbound over Dirt Road | 1971 | 20,750 | Fair |
| Pr 52 Northbound over COAMO RIVER & PR 545 | 1972 | 20,600 | Fair |
| Pr 52 Southbound over COAMO RIVER & PR 545 | 1972 | 20,600 | Fair |
| Pr 52 Southbound over Pr 153 | 1971 | 19,100 | Fair |
All bridges nearby: Santa Isabel Municipio, PR bridge conditions · every bridge in Santa Isabel Municipio · Puerto Rico bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.