PR 177
Carrying PR 177 over PR 1
9 KM S E OF SAN JUAN, San Juan, Puerto Rico
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
PR 177 in San Juan, Puerto Rico sits above 90% of rated Puerto Rico bridges on inventory load rating (64 t), while its 1976 build year is earlier than 51% of San Juan's recorded-year cohort (202 bridges).
PR 177 in San Juan, Puerto Rico is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1976, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure PR:010921
INTERSTATE-ERA · PRESTRESS · SINGLE-SPAN · DECK-LED · HEAVY-ADT · HEAVY-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- SINGLE-SPAN Single span
- DECK-LED Deck-led
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy load
- CAT-POOR Poor
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Structural health score
A composite of the deck, superstructure, and substructure NBI condition ratings plus the inventory load rating, benchmarked against the full national bridge corpus, distinct from the Good/Fair/Poor category above.
Bridge Snapshot: PR 177
The PR 177 bridge in San Juan, Puerto Rico carries PR 177 over PR 1. It was built in 1976, making it 50 years old today. It was last reconstructed in 1990, extending its service life. The structure is built primarily of prestressed concrete and spans 1 section, stretching 78.4 meters (257 feet) end to end. Daily traffic averages 27,600 vehicles, placing it in the heavily-trafficked tier of Puerto Rico bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection places the weakest component in poor condition (see the full component ratings below). A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed.
How PR 177 compares
Age against the county: built in 1976, earlier than 104 of San Juan's 202 bridges with a recorded construction year (51%), against a county median build year of 1977. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Puerto Rico bridges with a recorded inventory load rating (2,385 rated).
PR 177 vs every rated Puerto Rico bridge
Inventory load rating (metric tons), FHWA NBI, this state
64 Top 10% higher than 90% of 2,385 bridges
rated Puerto Rico bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
San Juan inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 202 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1976
- Last Reconstructed
- 1990
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 78.4 m (257 ft)
- Deck Width
- 36.9 m (121 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 27,600 vehicles/day
- Structure Number
- 010921
Condition Analysis
- • The deck (driving surface) rates poor at 4/9, with advanced deterioration recorded on the latest inspection.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
PR 177 is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare PR 177 against other structures in San Juan and across Puerto Rico. Puerto Rico bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for PR 177?
PR 177 in San Juan, Puerto Rico has a deck rating of 4/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is PR 177 inspected?
PR 177's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 27,600 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. PR 177 is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for PR 177?
PR 177 has an NBI inventory load rating of 63.8 metric tons.
Who is responsible for maintaining PR 177?
PR 177 is owned and maintained by State Highway Agency.
How old is PR 177 and does age affect safety?
PR 177 was built in 1976, making it 50 years old and last reconstructed in 1990.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.