County profile · official public datasets

Monroe County, NY

615 public highway bridges tracked in the FHWA National Bridge Inventory: 36.4% rated Good, 52.7% Fair, 10.9% Poor.

615
Public bridges: 36.4%
Good condition: 10.9%
Poor condition

The verdict

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

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

40th
of 62 on Poor share: 10.9%
Poor-condition share: 615
public highway bridges: 1975
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.

Monroe County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Monroe County ranks #40 of 62 New York counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 10.9%). Monroe County, New York contains 615 public highway bridges. Roughly 36.4% are rated “Good,” 52.7% “Fair,” and 10.9% “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

615

Public highway bridges in Monroe County

Good condition

36.4%

224 of 615 rated 7-9

Fair condition

52.7%

324 of 615 rated 5-6

Poor condition

10.9%

67 of 615 rated 4 or below

In-state Poor-share rank

#40 of 62

Among New York counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 615 NBI-tracked bridges by lowest applicable component rating.

Good

36.4% (224)

Fair

52.7% (324)

Poor

10.9% (67)

Monroe County's Poor-condition bridges carry 1,046,289 vehicle crossings a day

That is 10.8% of the county's reported daily bridge traffic on 10.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 15,853 crossings a day against 13,825 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 608 of 615 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

48.8% of Monroe County's bridges have passed the 50-year mark

300 of the 615 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 36.4% 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 9.4% of the county's Poor-condition bridge traffic

RTE 590 over RTE 286, built 1960, carries 97,989 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 67-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 1,046,289 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

5
1900s

5
1910s

15
1920s

10
1930s

23
1940s

9
1950s

64
1960s

112
1970s

81
1980s

94
1990s

96
2000s

56
2010s

38
2020s

7

What this shows Construction peaked in the 1960s, when 112 of the county's bridges still in the inventory were built, which is 18.2% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1975) matches the New York average (1972).

How Monroe County compares with New York's closest counties by inventory size

The 5 New York counties nearest Monroe County in number of bridges, with their condition splits. Its 10.9% Poor share is the 5th-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1976 is in line with the group.

Showing the 5 closest of 61 New York counties eligible for comparison.

Bridge inventory size and condition shares for Monroe County and the 5 New York counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Steuben County	627	41.5%	54.4%	4.1%	1984
Monroe County (this page)	615	36.4%	52.7%	10.9%	1975
Chautauqua County	559	44%	46.3%	9.7%	1977
Queens County	514	30.4%	62.3%	7.4%	1966
Oneida County	496	46.2%	42.3%	11.5%	1972
Cattaraugus County	484	55.4%	38.4%	6.2%	1982

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 Monroe 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 Monroe County, both outside New York so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside NY (615 bridges here).

Weld County, CO · 614 bridges
Allen County, IN · 613 bridges
Contra Costa County, CA · 618 bridges
Brazoria County, TX · 618 bridges

Similar average build year

Nearest mean year-built outside NY (1975 here).

San Bernardino County, CA · avg 1975 · 1,422 bridges
Lane County, OR · avg 1975 · 1,010 bridges
Fulton County, GA · avg 1975 · 775 bridges
Westmoreland County, PA · avg 1975 · 620 bridges

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

All 615 Good 224 Fair 324 Poor 67

Fair-condition bridges (324)

Sort:

Monroe County Bridge Snapshot

Condition distribution

Monroe County's Poor-condition bridges carry 1,046,289 vehicle crossings a day

48.8% of Monroe County's bridges have passed the 50-year mark

One structure carries 9.4% of the county's Poor-condition bridge traffic

How Monroe County compares with New York'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 (324)

RTE 19

GEORGE STREET

ANDREWS STREET

RTE 940T

MAIN STREET

RTE 31

CORWIN RD

RTE 940L

RTE 531

TWIN BRIDGE ROAD

BURNT MILL ROAD

MITCHELL ROAD

RTE I390

RTE 940K

ALLENS CREEK ROAD

EAST MANITOU ROAD

MARTHA STREET

RTE 390

REDMAN ROAD

SMITH STREET

RTE 261

CR 268

RTE 96

PARKER STREET

GILLETT ROAD

LOWDEN POINT ROAD

LOWDEN POINT ROAD

RTE 65

RTE 96

RTE 18

RTE 261

MILE SQUARE RD

RTE I90

RTE 947A

RTE 386

RTE 947A

RTE 104

WALKER ROAD

IRELAND ROAD

MON-WYN CO LNE RD

RTE 64

RTE 947A

RTE 947A

RTE 947A

RTE 947A

RTE 31

RTE 31

VINTAGE LANE

RTE I90

RTE 31

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