County profile · official public datasets

Lewis County, NY

167 public highway bridges tracked in the FHWA National Bridge Inventory: 33.5% rated Good, 50.3% Fair, 16.2% Poor.

167
Public bridges
33.5%
Good condition
16.2%
Poor condition

The verdict

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

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

55th
of 62 on Poor share
16.2%
Poor-condition share
167
public highway bridges
1972
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.

Lewis County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Lewis County ranks #55 of 62 New York counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 16.2%). Lewis County, New York contains 167 public highway bridges. Roughly 33.5% are rated “Good,” 50.3% “Fair,” and 16.2% “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

167

Public highway bridges in Lewis County

Good condition

33.5%

56 of 167 rated 7-9

Fair condition

50.3%

84 of 167 rated 5-6

Poor condition

16.2%

27 of 167 rated 4 or below

In-state Poor-share rank

#55 of 62

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

Condition distribution

Share of 167 NBI-tracked bridges by lowest applicable component rating.

Good
33.5% (56)
Fair
50.3% (84)
Poor
16.2% (27)

Lewis County's Poor-condition bridges carry 8,333 vehicle crossings a day

That is 5.2% of the county's reported daily bridge traffic on 15.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 321 crossings a day against 856 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 164 of 167 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

50.9% of Lewis County's bridges have passed the 50-year mark

85 of the 167 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 33.5% 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 27.5% of the county's Poor-condition bridge traffic

RTE 12 over MILL CREEK, built 1927, carries 2,290 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 27-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 8,333 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Lewis County's bridges were built

167 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1980s, when 33 of the county's bridges still in the inventory were built, which is 19.8% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1972) matches the New York average (1972).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

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

The 5 New York counties nearest Lewis County in number of bridges, with their condition splits. Its 16.2% Poor share is the 6th-lowest of these 6. Its average build year of 1972 against a peer-group mean of 1972 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 Lewis County and the 5 New York counties closest to it in inventory size
County Bridges Poor
Madison County 175 8.6%
Schoharie County 174 8%
Lewis County (this page) 167 16.2%
Livingston County 165 4.8%
Richmond County 164 1.8%
Genesee County 162 13.6%

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

Similar inventory size

Nearest county inventories outside NY (167 bridges here).

Similar average build year

Nearest mean year-built outside NY (1972 here).

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

All 167 Good 56 Fair 84 Poor 27

Poor-condition bridges (27)

RTE 26

Poor

Over: ROARING BROOK

3.1 MI SOUTH OF LOWVILLE, Lewis, NY

Built 1978 Load: 0.0 t ADT: 1,961

BAILEY ROAD

Poor

Over: INDEPENDENCE RIVER

1.3 MI NE OF SPERRYVILLE, Lewis, NY

Built 1900 Load: 1.8 t ADT: 2

OLD STATE ROAD

Poor

Over: DEER RIVER

2.3 MI SW OF DEER RIVER, Lewis, NY

Built 1891 Load: 2.6 t ADT: 77

TWIN SISTERS RD

Poor

Over: MOOSE RIVER

5.4 MI NE POTTERS CORNERS, Lewis, NY

Built 1920 Load: 4.5 t ADT: 7

PARTRIDGEVILLE RD

Poor

Over: OTTER CREEK

7.4 MI NE OF BRANTINGHAM, Lewis, NY

Built 1978 Load: 7.3 t ADT: 14

EATONVILLE ROAD

Poor

Over: OTTER CREEK

3 MILES EAST OF GLENFIELD, Lewis, NY

Built 1920 Load: 8.2 t ADT: 41

SCHIBLEY ROAD

Poor

Over: MOOSE RIVER

1.4 MI E OF LYONS FALLS, Lewis, NY

Built 1964 Load: 9.1 t ADT: 250

WOOD BATTLE ROAD

Poor

Over: COBB CREEK

3.1 MI S JCT RT 12, Lewis, NY

Built 1939 Load: 11.8 t ADT: 96

BRYANT BRIDGE RD

Poor

Over: FISH CREEK

6.1 MI SE OF HARRISVILLE, Lewis, NY

Built 1961 Load: 18.1 t ADT: 20

GORDON ROAD

Poor

Over: MILL CREEK TRIBUTARY

0.6 MI E OF W. LOWVILLE, Lewis, NY

Built 1925 Load: 19.1 t ADT: 127

BALD MOUNTAIN RD

Poor

Over: W B OSWEGATCHIE R

.2 MI N JCT BLD MT & LP R, Lewis, NY

Built 1945 Load: 20.1 t

STATZER ROAD

Poor

Over: POINT ROCK CREEK

5.8 MI SW OF WEST LEYDEN, Lewis, NY

Built 1987 Load: 21.8 t ADT: 28

SWEENEY ROAD

Poor

Over: BIG ALDER CREEK

1.7 MI W OF BYRON CORNERS, Lewis, NY

Built 1981 Load: 24.5 t ADT: 45

KUBINSKI ROAD

Poor

Over: MUD CREEK

3 MI EAST OF NEW BOSTON, Lewis, NY

Built 1970 Load: 25.4 t ADT: 3

LIBERTY ROAD

Poor

Over: DEER RIVER

0.4 MI S OF NEW BOSTON, Lewis, NY

Built 1965 Load: 26.3 t ADT: 159

COUNTY ROAD 194

Poor

Over: GULF STREAM

0.1 MI NE JCT RTS 177+194, Lewis, NY

Built 1933 Load: 28.1 t ADT: 633

Abandoned G & W RR

Poor

Over: Fish Creek

GreenfieldWesternRR/FishC, Lewis, NY

Built 1920 Load: 28.1 t ADT: 20

COUNTY ROAD 29

Poor

Over: WHETSTONE CREEK

2.6 MILES S OF MARTINSBUR, Lewis, NY

Built 1927 Load: 28.1 t ADT: 619

FRENCH SETLMNT RD

Poor

Over: W B OSWEGATCHIE R

2.3 MI S OF HARRISVILLE, Lewis, NY

Built 1964 Load: 29.9 t ADT: 139

PINCKNEY ROAD

Poor

Over: SANDY CREEK

4.9 MI NW OF BARNES CORS., Lewis, NY

Built 1959 Load: 29.9 t ADT: 21

YOUNGS MILL ROAD

Poor

Over: SWISS CREEK

8.0 MI NW OF CROGHAN, Lewis, NY

Built 1985 Load: 31.8 t ADT: 22

COUNTY ROAD 25

Poor

Over: COBB CREEK

4.5 MI NE OF NEW BOSTON, Lewis, NY

Built 1968 Load: 31.8 t ADT: 73

WHITESVILLE ROAD

Poor

Over: SHINGLE GULF

2.4 MI N OF BARNES CORS., Lewis, NY

Built 1956 Load: 31.8 t ADT: 238

RTE 410

Poor

Over: BLACK RIVER

0.5 Mi NE of Castorland, Lewis, NY

Built 1955 Load: 32.7 t ADT: 1,400

RTE 12

Poor

Over: MILL CREEK

6.5 MI NW JCT RTE 177+12, Lewis, NY

Built 1927 Load: 32.7 t ADT: 2,290

KIMBALLS MILL RD

Poor

Over: WB OSWEGATCHIE RV

6 MI SOUTH OF HARRISVILLE, Lewis, NY

Built 1900 Load: 41.7 t ADT: 40

PRINCE BROOK ROAD

Poor

Over: PRINCE BROOK

4.5 MI SW OF N.OSCEOLA, Lewis, NY

Built 1935 Load: 43.5 t ADT: 8

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
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.