County profile · official public datasets

Clinton County, NY

201 public highway bridges tracked in the FHWA National Bridge Inventory: 39.3% rated Good, 48.3% Fair, 12.4% Poor.

201
Public bridges: 39.3%
Good condition: 12.4%
Poor condition

The verdict

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

Clinton County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

47th
of 62 on Poor share: 12.4%
Poor-condition share: 201
public highway bridges: 1979
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.

Clinton County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Clinton County ranks #47 of 62 New York counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 12.4%). Clinton County, New York contains 201 public highway bridges. Roughly 39.3% are rated “Good,” 48.3% “Fair,” and 12.4% “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

201

Public highway bridges in Clinton County

Good condition

39.3%

79 of 201 rated 7-9

Fair condition

48.3%

97 of 201 rated 5-6

Poor condition

12.4%

25 of 201 rated 4 or below

In-state Poor-share rank

#47 of 62

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

Condition distribution

Share of 201 NBI-tracked bridges by lowest applicable component rating.

Good

39.3% (79)

Fair

48.3% (97)

Poor

12.4% (25)

Clinton County's Poor-condition bridges carry 32,509 vehicle crossings a day

That is 7.1% of the county's reported daily bridge traffic on 12.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,355 crossings a day against 2,218 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 198 of 201 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

44.3% of Clinton County's bridges have passed the 50-year mark

89 of the 201 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 39.3% 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 24.4% of the county's Poor-condition bridge traffic

MILT TPKE EXT over SARANAC RIVER, built 1992, carries 7,926 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 32,509 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

1
1900s

2
1920s

4
1930s

16
1940s

13
1950s

13
1960s

30
1970s

14
1980s

11
1990s

40
2000s

28
2010s

26
2020s

3

What this shows Construction peaked in the 1990s, when 40 of the county's bridges still in the inventory were built, which is 19.9% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1979, 7 years newer than the New York average of 1972.

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

The 5 New York counties nearest Clinton County in number of bridges, with their condition splits. Its 12.4% Poor share is the 3rd-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1969 is 10 years newer.

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

Bridge inventory size and condition shares for Clinton County and the 5 New York counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Montgomery County	205	34.6%	54.1%	11.2%	1965
Clinton County (this page)	201	39.3%	48.3%	12.4%	1979
Tompkins County	192	38.5%	46.9%	14.6%	1973
Cortland County	189	33.3%	49.7%	16.9%	1974
Franklin County	189	47.6%	40.7%	11.6%	1975
Washington County	189	36%	50.3%	13.8%	1960

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

Similar inventory size

Nearest county inventories outside NY (201 bridges here).

Williamson County, IL · 201 bridges
Hancock County, IN · 201 bridges
Pocahontas County, IA · 201 bridges
McCracken County, KY · 201 bridges

Similar average build year

Nearest mean year-built outside NY (1979 here).

Pima County, AZ · avg 1979 · 1,150 bridges
Jefferson County, KY · avg 1979 · 662 bridges
Spartanburg County, SC · avg 1979 · 638 bridges
McPherson County, KS · avg 1979 · 586 bridges

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

All 201 Good 79 Fair 97 Poor 25

All bridges (201)

Sort:

Clinton County Bridge Snapshot

Condition distribution

Clinton County's Poor-condition bridges carry 32,509 vehicle crossings a day

44.3% of Clinton County's bridges have passed the 50-year mark

One structure carries 24.4% of the county's Poor-condition bridge traffic

How Clinton 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 (201)

ARTHUR JARVIS RD

RTE I87

RTE I87

HAYES BROOK ROAD

LAKE SHORE ROAD

WILFRED KING ROAD

RYAN ROAD

RABIDEAU ROAD

LAVALLEY ROAD

TRUE BROOK ROAD

West Church St.

FISKE RD

RTE 11

RTE I87

RTE I87

CALKINS RD

CLINTONVILLE ROAD

RTE 190

NARROWS ROAD

COUNTY ROAD 1

US 00002 ML

RTE 442

RTE 442

TRUE BROOK ROAD

CANAVAN ROAD

RTE I87

RTE I87

RTE 22

RTE 456

COUNTY ROAD 8

TOM MILLER ROAD

RTE I87

RTE I87

BOWEN ROAD

RTE I87

RTE I87

COUNTY ROAD 38

CR 38

RTE 3

RTE 22

COUNTY ROAD 24

COUNTY ROAD 31

CHAZY LAKE ROAD

COLD BROOK ROAD

Rugar St.

COUNTY ROAD 3

SALMON RIVER ROAD

ANGELVILLE ROAD

RTE I87

RTE I87

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