County profile · official public datasets

Guaynabo County, PR

63 public highway bridges tracked in the FHWA National Bridge Inventory: 28.6% rated Good, 61.9% Fair, 9.5% Poor.

63
Public bridges: 28.6%
Good condition: 9.5%
Poor condition

The verdict

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

Guaynabo County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 20%
lowest Poor share in state: 9.5%
Poor-condition share: 63
public highway bridges: 1981
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.

Guaynabo County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Guaynabo County ranks #15 of 74 Puerto Rico counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.5%). Guaynabo County, Puerto Rico contains 63 public highway bridges. Roughly 28.6% are rated “Good,” 61.9% “Fair,” and 9.5% “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 Guaynabo County

Good condition

28.6%

18 of 63 rated 7-9

Fair condition

61.9%

39 of 63 rated 5-6

Poor condition

9.5%

6 of 63 rated 4 or below

In-state Poor-share rank

#15 of 74

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

Condition distribution

Share of 63 NBI-tracked bridges by lowest applicable component rating.

Good

28.6% (18)

Fair

61.9% (39)

Poor

9.5% (6)

Guaynabo County's Poor-condition bridges carry 172,600 vehicle crossings a day

That is 8.6% of the county's reported daily bridge traffic on 9.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 28,767 crossings a day against 18,363 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 63 of 63 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

33.3% of Guaynabo County's bridges have passed the 50-year mark

21 of the 63 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 28.6% 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 60.5% of the county's Poor-condition bridge traffic

PR 22 over PR 28, built 1971, carries 104,500 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 6-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 172,600 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

1
1930s

2
1940s

2
1950s

4
1960s

9
1970s

8
1980s

14
1990s

8
2000s

12
2010s

3

What this shows Construction peaked in the 1980s, when 14 of the county's bridges still in the inventory were built, which is 22.2% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1981, 7 years newer than the Puerto Rico average of 1974.

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

The 5 Puerto Rico counties nearest Guaynabo County in number of bridges, with their condition splits. Its 9.5% Poor share is the 1st-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1974 is 7 years newer.

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

Bridge inventory size and condition shares for Guaynabo County and the 5 Puerto Rico counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Carolina County	73	28.8%	60.3%	11%	1983
Humacao County	69	26.1%	60.9%	13%	1985
Guaynabo County (this page)	63	28.6%	61.9%	9.5%	1981
Utuado County	57	12.3%	66.7%	21.1%	1961
Juana Díaz County	55	9.1%	72.7%	18.2%	1970
Arecibo County	51	3.9%	78.4%	17.6%	1971

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

Similar inventory size

Nearest county inventories outside PR (63 bridges here).

Highlands County, FL · 63 bridges
Chattahoochee County, GA · 63 bridges
Red River County, LA · 63 bridges
Lincoln County, ME · 63 bridges

Similar average build year

Nearest mean year-built outside PR (1981 here).

Franklin County, OH · avg 1981 · 922 bridges
Greenville County, SC · avg 1981 · 635 bridges
Montgomery County, OH · avg 1981 · 632 bridges
McLean County, IL · avg 1981 · 624 bridges

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

All 63 Good 18 Fair 39 Poor 6

All bridges (63)

Sort:

Guaynabo County Bridge Snapshot

Condition distribution

Guaynabo County's Poor-condition bridges carry 172,600 vehicle crossings a day

33.3% of Guaynabo County's bridges have passed the 50-year mark

One structure carries 60.5% of the county's Poor-condition bridge traffic

How Guaynabo 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

All bridges (63)

PR-834

PR 177

ALPIERRE STREET

PR 20 SOUTHBOUND

PR 836

PR 1

PR 2

PR 173 KM 9.0

PR 173

PR 836

PR 2

PR 834

PERIMETER RD.

PR 20 NORTHBOUND

PR 22

PARQUE DE NI&#165;

SAN IGNACIO STREET

OFF PR 836

PERIFERAL ST.

PR 169

ESMERALDA AVENUE

PR 20

PR 22 WESTBOUND

PR 169

PR 2 EASTBOUND

PR 837

SAN IGNACIO AVENUE

PR 2

PR 20

PR 199

PR 22 EASTBOUND

SAN IGNACIO AVENUE

PR.20

PR 20 KM 7.6

PR-20 KM 7.5

PR 2 WESTBOUND

PR 199

OFF PR 838

RAMP F.PR22 TO PR2

RAMP PR 23 TO PR 2

PR 20

COLUMBUS ST.

AVE LOS FILTROS

PR 20 SOUTHBOUND

OFF PR 834 AT 5.6

PR 23 KM 6.3

PR 20 NORTHBOUND

AVE. NTE. KM 0.01

PR 1 KM 21.1

RAMP PR-2 TO PR-23

Related

PARQUE DE NI¥