County profile · official public datasets

Santa Isabel County, PR

12 public highway bridges tracked in the FHWA National Bridge Inventory: 0% rated Good, 75% Fair, 25% Poor.

12
Public bridges
0%
Good condition
25%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Santa Isabel County posts a higher-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.

67th
of 74 on Poor share
25%
Poor-condition share
12
public highway bridges
1970
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Santa Isabel County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Santa Isabel County ranks #67 of 74 Puerto Rico counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 25%). Santa Isabel County, Puerto Rico contains 12 public highway bridges. Roughly 0% are rated “Good,” 75% “Fair,” and 25% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

12

Public highway bridges in Santa Isabel County

Good condition

0%

0 of 12 rated 7-9

Fair condition

75%

9 of 12 rated 5-6

Poor condition

25%

3 of 12 rated 4 or below

In-state Poor-share rank

#67 of 74

Among Puerto Rico counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 12 NBI-tracked bridges by lowest applicable component rating.

Good
0% (0)
Fair
75% (9)
Poor
25% (3)

Santa Isabel County's Poor-condition bridges carry 36,800 vehicle crossings a day

That is 16.8% of the county's reported daily bridge traffic on 25% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 12 of 12 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

91.7% of Santa Isabel County's bridges have passed the 50-year mark

11 of the 12 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 0% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 48.9% of the county's Poor-condition bridge traffic

PR 52 NORTHBOUND over PR 543 AND JUEYES RIVER, built 1971, carries 18,000 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 3-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 36,800 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Santa Isabel County's bridges were built

12 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 11 of the county's bridges still in the inventory were built, which is 91.7% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1970) matches the Puerto Rico average (1974).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Santa Isabel County compares with Puerto Rico's closest counties by inventory size

The 5 Puerto Rico counties nearest Santa Isabel County in number of bridges, with their condition splits. Its 25% Poor share is the 4th-lowest of these 6. Its average build year of 1970 against a peer-group mean of 1971 is in line with the group.

Showing the 5 closest of 73 Puerto Rico counties eligible for comparison.

Bridge inventory size and condition shares for Santa Isabel County and the 5 Puerto Rico counties closest to it in inventory size
County Bridges Poor
Aguadilla County 13 30.8%
Aguas Buenas County 13 0%
Arroyo County 13 15.4%
Las Marías County 13 7.7%
Trujillo Alto County 12 33.3%
Santa Isabel County (this page) 12 25%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Santa Isabel County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Santa Isabel County, both outside Puerto Rico so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside PR (12 bridges here).

Similar average build year

Nearest mean year-built outside PR (1970 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 12 Good 0 Fair 9 Poor 3

All bridges (12)

PR 52 SOUTHBOUND

Fair

Over: COAMO RIVER & PR 545

AT COAMO RESERVOIR DAM, Santa Isabel, PR

Built 1972 Load: 24.1 t ADT: 20,600

PR 52 NORTHBOUND

Fair

Over: COAMO RIVER & PR 545

4 MILES N OF SANTA ISABEL, Santa Isabel, PR

Built 1972 Load: 43.4 t ADT: 20,600

PR 1

Fair

Over: COAMO RIVER & LOCAL

2 KM N W OF SANTA ISABEL, Santa Isabel, PR

Built 1977 Load: 43.4 t ADT: 11,000

PR 52 NORTHBOUND

Fair

Over: PR 153

5.3 KM N N E SANTA ISABEL, Santa Isabel, PR

Built 1971 Load: 45.0 t ADT: 41,200

PR 52 SOUTHBOUND

Fair

Over: PR 153

5.3 KM N N E SANTA ISABEL, Santa Isabel, PR

Built 1971 Load: 45.0 t ADT: 19,100

PR 52 NORTHBOUND

Fair

Over: DIRT ROAD

WEST OF SALINAS TOLL, Santa Isabel, PR

Built 1971 Load: 48.6 t ADT: 20,750

PR 52 SOUTHBOUND

Fair

Over: DIRT ROAD

WEST OF SALINAS TOLL, Santa Isabel, PR

Built 1971 Load: 48.6 t ADT: 20,750

PR 52 NORTHBOUND

Fair

Over: PR 536

7 KM N W OF SANTA ISABEL, Santa Isabel, PR

Built 1970 Load: 51.8 t ADT: 13,950

PR 52 SOUTHBOUND

Fair

Over: PR 536

7 KM N W OF SANTA ISABEL, Santa Isabel, PR

Built 1970 Load: 51.8 t ADT: 13,950

PR 536

Poor

Over: DESCALABRADO RIVER

10 KM S E OF JUANA DIAZ, Santa Isabel, PR

Built 1951 Load: 0.0 t ADT: 800

PR 52 NORTHBOUND

Poor

Over: PR 543 AND JUEYES RIVER

5 KM WEST FROM SALINAS, Santa Isabel, PR

Built 1971 Load: 55.9 t ADT: 18,000

PR 52 SOUTHBOUND

Poor

Over: PR 543 AND JUEYES RIVER

5.5 KM N W OF SALINAS, Santa Isabel, PR

Built 1971 Load: 55.9 t ADT: 18,000

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.