County profile · official public datasets

Mayagüez County, PR

45 public highway bridges tracked in the FHWA National Bridge Inventory: 20% rated Good, 68.9% Fair, 11.1% Poor.

45
Public bridges: 20%
Good condition: 11.1%
Poor condition

The verdict

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

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

Top 34%
lowest Poor share in state: 11.1%
Poor-condition share: 45
public highway bridges: 1971
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.

Mayagüez County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Mayagüez County ranks #25 of 74 Puerto Rico counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11.1%). Mayagüez County, Puerto Rico contains 45 public highway bridges. Roughly 20% are rated “Good,” 68.9% “Fair,” and 11.1% “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 Mayagüez County

Good condition

20%

9 of 45 rated 7-9

Fair condition

68.9%

31 of 45 rated 5-6

Poor condition

11.1%

5 of 45 rated 4 or below

In-state Poor-share rank

#25 of 74

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

Condition distribution

Share of 45 NBI-tracked bridges by lowest applicable component rating.

Good

20% (9)

Fair

68.9% (31)

Poor

11.1% (5)

Mayagüez County's Poor-condition bridges carry 63,150 vehicle crossings a day

That is 8.5% of the county's reported daily bridge traffic on 11.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 12,630 crossings a day against 23,147 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 45 of 45 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

55.6% of Mayagüez County's bridges have passed the 50-year mark

25 of the 45 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 20% 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 72.5% of the county's Poor-condition bridge traffic

PR 2 over YAGUEZ RIVER & URBAN, built 1961, carries 45,800 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 5-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 63,150 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

1
1900s

2
1920s

1
1940s

1
1950s

6
1960s

6
1970s

12
1980s

4
1990s

7
2000s

2
2010s

3

What this shows Construction peaked in the 1970s, when 12 of the county's bridges still in the inventory were built, which is 26.7% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1971) matches the Puerto Rico average (1974).

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

The 5 Puerto Rico counties nearest Mayagüez County in number of bridges, with their condition splits. Its 11.1% Poor share is the 1st-lowest of these 6. Its average build year of 1971 against a peer-group mean of 1976 is 5 years older.

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

Bridge inventory size and condition shares for Mayagüez County and the 5 Puerto Rico counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Río Grande County	47	34%	53.2%	12.8%	1979
San Germán County	45	26.7%	53.3%	20%	1975
Mayagüez County (this page)	45	20%	68.9%	11.1%	1971
Yabucoa County	41	22%	56.1%	22%	1966
Salinas County	40	2.5%	77.5%	20%	1976
Yauco County	40	20%	65%	15%	1986

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

Similar inventory size

Nearest county inventories outside PR (45 bridges here).

Dawson County, GA · 45 bridges
Miller County, GA · 45 bridges
Twiggs County, GA · 45 bridges
Caribou County, ID · 45 bridges

Similar average build year

Nearest mean year-built outside PR (1971 here).

Wayne County, MI · avg 1971 · 1,026 bridges
Baltimore County, MD · avg 1971 · 783 bridges
Washington County, PA · avg 1971 · 655 bridges
Linn County, OR · avg 1971 · 566 bridges

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

All 45 Good 9 Fair 31 Poor 5

All bridges (45)

Sort:

Mayagüez County Bridge Snapshot

Condition distribution

Mayagüez County's Poor-condition bridges carry 63,150 vehicle crossings a day

55.6% of Mayagüez County's bridges have passed the 50-year mark

One structure carries 72.5% of the county's Poor-condition bridge traffic

How Mayagüez 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 (45)

PR 2

PR 106

PR 380

CAMINO CHARLUISANT

OFF PR 348

PR 102

PR 2 RAMAL

PR 352

PR 114

PR 102 AT KM 5.7

PR 105

PR 102

PR 348

PR 380

PR 3342

OFF PR 348

PR 2

ROAD IN CAAM CAMPU

PR 102

PR 108

PR 102

PR 106

PR 2R

PR 64

PR 108

PR 341

PR 2

RAMP PR 2 -MVigoST

PR 348

PR 2

PR 102

CAMINO LOS LAZOS

PR 2

OFF PR 380

PR 2 RAMAL

PR-3380

PR 2

PR 114

PR 102 AT KM 2.5

PR 102

PR 354

PR 102

PR 106

OFF PR 106 KM 2.2

PR 2

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