County profile · official public datasets

Guayanilla County, PR

34 public highway bridges tracked in the FHWA National Bridge Inventory: 5.9% rated Good, 73.5% Fair, 20.6% Poor.

34
Public bridges: 5.9%
Good condition: 20.6%
Poor condition

The verdict

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

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

59th
of 74 on Poor share: 20.6%
Poor-condition share: 34
public highway bridges: 1974
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.

Guayanilla County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Guayanilla County ranks #59 of 74 Puerto Rico counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 20.6%). Guayanilla County, Puerto Rico contains 34 public highway bridges. Roughly 5.9% are rated “Good,” 73.5% “Fair,” and 20.6% “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

Public highway bridges in Guayanilla County

Good condition

5.9%

2 of 34 rated 7-9

Fair condition

73.5%

25 of 34 rated 5-6

Poor condition

20.6%

7 of 34 rated 4 or below

In-state Poor-share rank

#59 of 74

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

Condition distribution

Share of 34 NBI-tracked bridges by lowest applicable component rating.

Good

5.9% (2)

Fair

73.5% (25)

Poor

20.6% (7)

Guayanilla County's Poor-condition bridges carry 22,850 vehicle crossings a day

That is 11% of the county's reported daily bridge traffic on 20.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 3,264 crossings a day against 18,700 for a Good-condition one. 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 34 of 34 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

61.8% of Guayanilla County's bridges have passed the 50-year mark

21 of the 34 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 5.9% 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 82.5% of the county's Poor-condition bridge traffic

PR 2 EASTBOUND over GUAYANILLA RIVER L ROAD, built 1970, carries 18,850 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 7-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 22,850 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

1
1950s

6
1960s

8
1970s

8
1980s

5
1990s

2
2000s

3
2010s

1

What this shows Construction peaked in the 1960s, when 8 of the county's bridges still in the inventory were built, which is 23.5% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1974) matches the Puerto Rico average (1974).

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

The 5 Puerto Rico counties nearest Guayanilla County in number of bridges, with their condition splits. Its 20.6% Poor share is the 6th-lowest of these 6. Its average build year of 1974 against a peer-group mean of 1968 is 6 years newer.

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

Bridge inventory size and condition shares for Guayanilla County and the 5 Puerto Rico counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Jayuya County	34	5.9%	76.5%	17.6%	1964
Guayanilla County (this page)	34	5.9%	73.5%	20.6%	1974
Adjuntas County	33	9.1%	75.8%	15.2%	1960
Patillas County	32	21.9%	59.4%	18.8%	1970
San Sebastián County	31	16.1%	74.2%	9.7%	1966
Canóvanas County	30	36.7%	46.7%	16.7%	1979

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 Guayanilla 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 Guayanilla County, both outside Puerto Rico so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside PR (34 bridges here).

Bear Lake County, ID · 34 bridges
Plaquemines County, LA · 34 bridges
Golden Valley County, ND · 34 bridges
Day County, SD · 34 bridges

Similar average build year

Nearest mean year-built outside PR (1974 here).

Knox County, TN · avg 1974 · 588 bridges
Summit County, OH · avg 1974 · 563 bridges
Onondaga County, NY · avg 1974 · 472 bridges
Orange County, NY · avg 1974 · 472 bridges

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

All 34 Good 2 Fair 25 Poor 7

Fair-condition bridges (25)

Sort:

Guayanilla County Bridge Snapshot

Condition distribution

Guayanilla County's Poor-condition bridges carry 22,850 vehicle crossings a day

61.8% of Guayanilla County's bridges have passed the 50-year mark

One structure carries 82.5% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Fair-condition bridges (25)

PR 2 WESTBOUND

PR 127

PR 377

PR 383

OFF PR 375 KM. 2.1

PR 2

PR 132

PR 378

OFF PR 375 AT 0.85

PR 375

PR 127

PR 127

OFF PR 127

PR 2 EASTBOUND

OFF PR 381@ K1.15

PR 3336

PR 378

PR 127

OFF PR 378 AT 3.30

OFF PR 375 AT 0.8

PR 378

PR 127

PR 127

PR 127

PR 381

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