Total bridges
402
Public highway bridges in Allegany County
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.
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.
When Allegany County's bridges were built
402 bridges with a recorded construction year, grouped by decade
- 1920s 1
1920–1929
1 bridges
- 1930s 15
1930–1939
15 bridges
- 1940s 6
1940–1949
6 bridges
- 1950s 20
1950–1959
20 bridges
- 1960s
1960–1969
46 bridges
- 1970s
1970–1979
114 bridges
- 1980s
1980–1989
55 bridges
- 1990s
1990–1999
65 bridges
- 2000s
2000–2009
46 bridges
- 2010s 28
2010–2019
28 bridges
- 2020s 6
2020–2029
6 bridges
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.
| 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.
Good-condition bridges (157)
FARNSWORTH ROAD
GoodOver: TRIB GRIFFIN CREE
3 MILES SE OF CUBA, Allegany, NY
Built 1981 Load: 72.6 t ADT: 108
COMMONS ROAD
GoodOver: COMMONS CREEK
0.8MI NE OF ANGELICA, Allegany, NY
Built 1999 Load: 75.3 t ADT: 92
COUNTY ROAD 1
GoodOver: S BR VANCAMPEN CK
.3 MI WEST OF NILE, Allegany, NY
Built 2000 Load: 75.3 t ADT: 339
COUNTY ROAD 22
GoodOver: CHENUNDA CREEK
2.6 M E OF HALLSPORT, Allegany, NY
Built 1999 Load: 75.3 t ADT: 271
COUNTY ROAD 20
GoodOver: TANNERY CREEK
0.6 MI EAST OF NY ROUTE 3, Allegany, NY
Built 2021 Load: 84.4 t ADT: 1,138
COUNTY ROAD 2
GoodOver: KARR VALLEY CREEK
3.1 MI NE OF W ALMOND, Allegany, NY
Built 2008 Load: 84.4 t ADT: 254
RTE 21
GoodOver: RAILROAD BROOK
3.0 MI N JCT 417 & 21, Allegany, NY
Built 1986 Load: 89.8 t ADT: 2,212
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.