County profile · official public datasets

Allegany County, NY

402 public highway bridges tracked in the FHWA National Bridge Inventory: 39.1% rated Good, 54.7% Fair, 6.2% Poor.

402
Public bridges: 39.1%
Good condition: 6.2%
Poor condition

The verdict

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

Allegany 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 18%
lowest Poor share in state: 6.2%
Poor-condition share: 402
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.

Allegany County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Allegany County ranks #11 of 62 New York counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.2%). Allegany County, New York contains 402 public highway bridges. Roughly 39.1% are rated “Good,” 54.7% “Fair,” and 6.2% “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

402

Public highway bridges in Allegany County

Good condition

39.1%

157 of 402 rated 7-9

Fair condition

54.7%

220 of 402 rated 5-6

Poor condition

6.2%

25 of 402 rated 4 or below

In-state Poor-share rank

#11 of 62

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

Condition distribution

Share of 402 NBI-tracked bridges by lowest applicable component rating.

Good

39.1% (157)

Fair

54.7% (220)

Poor

6.2% (25)

Allegany County's Poor-condition bridges carry 7,364 vehicle crossings a day

That is 1.6% of the county's reported daily bridge traffic on 6.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 295 crossings a day against 1,039 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 402 of 402 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

43.8% of Allegany County's bridges have passed the 50-year mark

176 of the 402 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 39.1% 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 17.9% of the county's Poor-condition bridge traffic

RTE 248 over CRYDER CREEK, built 1981, carries 1,319 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 25-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 7,364 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

1
1930s

15
1940s

6
1950s

20
1960s

46
1970s

114
1980s

55
1990s

65
2000s

46
2010s

28
2020s

6

What this shows Construction peaked in the 1970s, when 114 of the county's bridges still in the inventory were built, which is 28.4% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1981, 9 years newer than the New York average of 1972.

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

The 5 New York counties nearest Allegany County in number of bridges, with their condition splits. Its 6.2% Poor share is the 3rd-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 61 New York counties eligible for comparison.

Bridge inventory size and condition shares for Allegany County and the 5 New York counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Delaware County	450	38.4%	54.7%	6.9%	1977
Allegany County (this page)	402	39.1%	54.7%	6.2%	1981
Ulster County	392	21.7%	57.4%	20.9%	1974
Suffolk County	369	27.1%	71.5%	1.4%	1968
Sullivan County	365	39.2%	53.2%	7.7%	1975
Albany County	343	29.7%	65%	5.2%	1975

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

Similar inventory size

Nearest county inventories outside NY (402 bridges here).

Marshall County, KS · 402 bridges
Cuming County, NE · 402 bridges
Wilson County, TN · 402 bridges
San Luis Obispo County, CA · 401 bridges

Similar average build year

Nearest mean year-built outside NY (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 402 Good 157 Fair 220 Poor 25

All bridges (402)

Sort:

Allegany County Bridge Snapshot

Condition distribution

Allegany County's Poor-condition bridges carry 7,364 vehicle crossings a day

43.8% of Allegany County's bridges have passed the 50-year mark

One structure carries 17.9% of the county's Poor-condition bridge traffic

How Allegany 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

All bridges (402)

COUNTY ROAD 40

COUNTY ROAD 19

RTE 275

RTE 19A

DRY BROOK RD

JOHNSON ROAD

MILL STREET

COUNTY ROAD 7B

RTE 19

RUSH CREEK RD

WATSON ROAD

RTE I86

RTE I86

RTE I86

RTE I86

BRISTOL STREET

COUNTY ROAD 23

COUNTY ROAD 10

COUNTY ROAD 10

RTE 19

RTE I86

RTE I86

RTE I86

RTE 19

COUNTY ROAD 23

RTE 19

HIGGINS CREEK ROAD

COUNTY ROAD 11

KNIGHT CREEK ROAD

OLEAN ST

COUNTY ROAD 1

RTE 19

RTE I86

BACK RIVER RD

COUNTY RD 4

HILTONVILLE ROAD

COUNTY ROAD 41

PIXLEY HILL ROAD

COUNTY ROAD 15

STANZ ROAD

MONEGAN ROAD

WALBRIDGE ROAD

BALDWIN ROAD

COUNTY ROAD 10

CENTER STREET

RTE 19

EAST VALLEY ROAD

EAST VALLEY ROAD

EAST VALLEY ROAD

RTE 19

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