Pr 178 0.8 Km over Nigua River
Arroyo Municipio, Puerto Rico · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Pr 178 0.8 Km over Nigua River in Arroyo Municipio, Puerto Rico, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1988, making it 37 years old at the 2025 inventory.
- It carries about 7,500 vehicles a day (traffic count year 2017).
- Its listed owner is the state highway agency.
- It is one of 10 of the 13 inventoried bridges in Arroyo Municipio rated fair (76.9%); 1 (7.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (substructure 7 to 5).
- Its most recent inspection on record is dated June 2024, on a 12-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 → (17.96717, -66.06107)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 117 ft |
| Location | 0.8 KM INT PR 3 & PR |
| NBI structure number | 018941 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Puerto Rico department of transportation.
Busiest bridges in Arroyo Municipio
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Pr 3 132.5 Km over Nigua River | 1981 | 27,700 | Fair |
| Pr 3 over Yaurel Creek | 2003 | 19,800 | Good |
| Pr 3 Km 132.0 over Nigua River | 2005 | 17,600 | Fair |
| Pr 54 over Patillas Channel | 2000 | 17,500 | Good |
| Pr 753 over Irrigation Channel | 1948 | 10,300 | Fair |
| Off Pr 178 Km 0.7 over Nigua River | 2000 | 7,500 | Fair |
All bridges nearby: Arroyo Municipio, PR bridge conditions · every bridge in Arroyo Municipio · Puerto Rico bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.