County profile · official public datasets

Steuben County, NY

627 public highway bridges tracked in the FHWA National Bridge Inventory: 41.5% rated Good, 54.4% Fair, 4.1% Poor.

627
Public bridges: 41.5%
Good condition: 4.1%
Poor condition

The verdict

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

Steuben County pairs a top-10% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 10%
lowest Poor share in state: 4.1%
Poor-condition share: 627
public highway bridges: 1984
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.

Steuben County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Steuben County ranks #6 of 62 New York counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.1%). Steuben County, New York contains 627 public highway bridges. Roughly 41.5% are rated “Good,” 54.4% “Fair,” and 4.1% “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

627

Public highway bridges in Steuben County

Good condition

41.5%

260 of 627 rated 7-9

Fair condition

54.4%

341 of 627 rated 5-6

Poor condition

4.1%

26 of 627 rated 4 or below

In-state Poor-share rank

#6 of 62

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

Condition distribution

Share of 627 NBI-tracked bridges by lowest applicable component rating.

Good

41.5% (260)

Fair

54.4% (341)

Poor

4.1% (26)

Steuben County's Poor-condition bridges carry 17,382 vehicle crossings a day

That is 0.8% of the county's reported daily bridge traffic on 4.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 669 crossings a day against 2,181 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 625 of 627 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

37.2% of Steuben County's bridges have passed the 50-year mark

233 of the 627 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 41.5% 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 17.2% of the county's Poor-condition bridge traffic

COUNTY ROAD 115 over S B GLENDENING CK, built 1937, carries 2,998 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 26-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 17,382 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

1
1900s

1
1910s

1
1920s

3
1930s

27
1940s

13
1950s

17
1960s

84
1970s

129
1980s

65
1990s

126
2000s

73
2010s

69
2020s

18

What this shows Construction peaked in the 1970s, when 129 of the county's bridges still in the inventory were built, which is 20.6% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1984, 12 years newer than the New York average of 1972.

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

The 5 New York counties nearest Steuben County in number of bridges, with their condition splits. Its 4.1% Poor share is the 1st-lowest of these 6. Its average build year of 1984 against a peer-group mean of 1974 is 10 years newer.

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

Bridge inventory size and condition shares for Steuben County and the 5 New York counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Steuben County (this page)	627	41.5%	54.4%	4.1%	1984
Monroe County	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 Steuben 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 Steuben County, both outside New York so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside NY (627 bridges here).

McLean County, IL · 624 bridges
Montgomery County, OH · 632 bridges
Westmoreland County, PA · 620 bridges
Greenville County, SC · 635 bridges

Similar average build year

Nearest mean year-built outside NY (1984 here).

Hennepin County, MN · avg 1984 · 936 bridges
Duval County, FL · avg 1984 · 831 bridges
El Paso County, CO · avg 1984 · 686 bridges
Bell County, TX · avg 1984 · 660 bridges

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

All 627 Good 260 Fair 341 Poor 26

Fair-condition bridges (341)

Sort:

Steuben County Bridge Snapshot

Condition distribution

Steuben County's Poor-condition bridges carry 17,382 vehicle crossings a day

37.2% of Steuben County's bridges have passed the 50-year mark

One structure carries 17.2% of the county's Poor-condition bridge traffic

How Steuben 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 (341)

RTE 21

RTE I86

RTE I86

OLD STATE ROAD

TINKERTOWN ROAD

MILL STREET

COUNTY ROAD 26

County Road 60

RTE 15U

RTE I86

RTE 417

RTE 417

RTE I86

RTE I86

RTE I390

RTE I390

COUNTY ROAD 6

COUNTY ROAD 65

COUNTY ROAD 68

RTE 415

COUNTY ROAD 7

COUNTY ROAD 5

RTE 99

RTE I86

RTE 415

RTE 21

RTE 962B

RTE 15U

RTE 15U

RTE 961

SONORA ROAD

COUNTY ROAD 11

COUNTY ROAD 105

RTE 15U

RTE 248

BARDEEN ROAD

HINKLEY HILL ROAD

RTE 15

RTE I86

RTE 36

RTE 21

RTE I86

RTE I390

RTE I390

GRISWOLD ROAD

COUNTY ROAD 6

COUNTY ROAD 80

RTE 352

RTE I86

RTE I86

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