County profile · official public datasets

Trempealeau County, WI

260 public highway bridges tracked in the FHWA National Bridge Inventory: 47.3% rated Good, 41.2% Fair, 11.5% Poor.

260
Public bridges
47.3%
Good condition
11.5%
Poor condition

The verdict

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

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

64th
of 72 on Poor share
11.5%
Poor-condition share
260
public highway bridges
1987
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.

Trempealeau County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Trempealeau County ranks #64 of 72 Wisconsin counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11.5%). Trempealeau County, Wisconsin contains 260 public highway bridges. Roughly 47.3% are rated “Good,” 41.2% “Fair,” and 11.5% “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

260

Public highway bridges in Trempealeau County

Good condition

47.3%

123 of 260 rated 7-9

Fair condition

41.2%

107 of 260 rated 5-6

Poor condition

11.5%

30 of 260 rated 4 or below

In-state Poor-share rank

#64 of 72

Among Wisconsin counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 260 NBI-tracked bridges by lowest applicable component rating.

Good
47.3% (123)
Fair
41.2% (107)
Poor
11.5% (30)

Trempealeau County's Poor-condition bridges carry 9,038 vehicle crossings a day

That is 2.1% of the county's reported daily bridge traffic on 11.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 301 crossings a day against 2,035 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 260 of 260 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

25% of Trempealeau County's bridges have passed the 50-year mark

65 of the 260 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 47.3% 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 48.7% of the county's Poor-condition bridge traffic

USH 10-USH 53-10TH over BUFFALO RIVER, built 1937, carries 4,400 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 30-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 9,038 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Trempealeau County's bridges were built

260 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 47 of the county's bridges still in the inventory were built, which is 18.1% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1987) matches the Wisconsin average (1984).

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

How Trempealeau County compares with Wisconsin's closest counties by inventory size

The 5 Wisconsin counties nearest Trempealeau County in number of bridges, with their condition splits. Its 11.5% Poor share is the 6th-lowest of these 6. Its average build year of 1987 against a peer-group mean of 1986 is in line with the group.

Showing the 5 closest of 71 Wisconsin counties eligible for comparison.

Bridge inventory size and condition shares for Trempealeau County and the 5 Wisconsin counties closest to it in inventory size
County Bridges Poor
Sauk County 271 8.9%
Manitowoc County 269 3.7%
Winnebago County 263 3.4%
Trempealeau County (this page) 260 11.5%
Fond du Lac County 251 10.4%
La Crosse County 249 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 Trempealeau 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 Trempealeau County, both outside Wisconsin so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside WI (260 bridges here).

Similar average build year

Nearest mean year-built outside WI (1987 here).

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

All 260 Good 123 Fair 107 Poor 30

Poor-condition bridges (30)

LRD WOLFE RD

Poor

Over: BR TRAVERSE VALLEY CREEK

0.3M N JCT CTH X, Trempealeau, WI

Built 1961 Load: 14.6 t ADT: 23

CTH JJ

Poor

Over: LATCH VALLEY CREEK

1.8M N JCT CTH J, Trempealeau, WI

Built 1930 Load: 16.2 t ADT: 65

LRD SMIKRUD RD

Poor

Over: GRANT CREEK

1.8M N JCT STH 54, Trempealeau, WI

Built 1940 Load: 16.2 t ADT: 23

LRD HOLCOMB COULEE

Poor

Over: HOLCOMB COULEE CREEK

2.7M E JCT STH 93, Trempealeau, WI

Built 1930 Load: 17.8 t ADT: 94

LRD MIDDLE RD

Poor

Over: MYERS VALLEY CREEK

0.2M W JCT CTH J, Trempealeau, WI

Built 1921 Load: 17.8 t ADT: 94

CTH D

Poor

Over: ELK CREEK

0.2M N JCT CTH E, Trempealeau, WI

Built 1958 Load: 19.4 t ADT: 542

CTH G

Poor

Over: BR PINE CREEK

1.6M N JCT CTH J, Trempealeau, WI

Built 1915 Load: 19.4 t ADT: 531

LRD C SOBOTTA LANE

Poor

Over: NEWCOMB VALLEY CREEK

0.1M E JCT STH 95, Trempealeau, WI

Built 1950 Load: 19.4 t ADT: 20

LRD LIEN LANE (DEA

Poor

Over: N FK BEAVER CREEK

0.3M N JCT CTH C, Trempealeau, WI

Built 1966 Load: 21.1 t ADT: 20

LRD NORWAY VALLEY

Poor

Over: TAMARACK RIVER

2.3M N JCT STH 93, Trempealeau, WI

Built 1928 Load: 22.7 t ADT: 94

LRD SOPPA RD

Poor

Over: TURTON CREEK

0.1M N JCT CTH T, Trempealeau, WI

Built 1962 Load: 22.7 t ADT: 47

CTH P

Poor

Over: BIG SLOUGH CREEK

1.7M E JCT STH 121, Trempealeau, WI

Built 1971 Load: 25.9 t ADT: 303

LRD SWEDE VALLEY R

Poor

Over: ELK CREEK

0.2M W JCT STH 93, Trempealeau, WI

Built 1968 Load: 27.5 t ADT: 94

LRD MASON LANE

Poor

Over: BR FRENCH CREEK

0.5M W JCT CTH T, Trempealeau, WI

Built 1950 Load: 27.5 t ADT: 94

CTH BB

Poor

Over: BORST VALLEY CREEK

0.2M E JCT CTH V, Trempealeau, WI

Built 1940 Load: 29.2 t ADT: 21

LRD SKUNK COULEE R

Poor

Over: GRANT CREEK

0.9M N JCT STH 54, Trempealeau, WI

Built 1928 Load: 30.8 t ADT: 58

LRD TWINDE LANE (D

Poor

Over: BEAR CREEK

0.1M W JCT USH 53, Trempealeau, WI

Built 1968 Load: 30.8 t ADT: 20

LRD RIVER VALLEY R

Poor

Over: NORTH CREEK

0.5M E JCT CTH A, Trempealeau, WI

Built 1964 Load: 32.4 t ADT: 175

LRD ROBINSON LANE

Poor

Over: S FK BEAVER CREEK

0.3M N JCT CTH D, Trempealeau, WI

Built 1957 Load: 32.4 t ADT: 20

LRD FILLA VALLEY R

Poor

Over: LYGA VALLEY CREEK

0.6M S JCT CTH X, Trempealeau, WI

Built 1935 Load: 34.0 t ADT: 18

LRD WOZNEY BAUTCH

Poor

Over: LEWIS VALLEY CREEK

2.2M W JCT STH 93, Trempealeau, WI

Built 1930 Load: 34.0 t ADT: 23

LRD S. RIVER RD

Poor

Over: TRUMP COULEE CREEK

1.5M E JCT CTH S, Trempealeau, WI

Built 1959 Load: 34.0 t ADT: 470

CTH P

Poor

Over: BIG SLOUGH CREEK

1.3M E JCT STH 121, Trempealeau, WI

Built 1960 Load: 34.0 t ADT: 303

CTH E

Poor

Over: BR ELK CREEK

0.8M S JCT CTH EE, Trempealeau, WI

Built 1968 Load: 34.0 t ADT: 412

CTH BB

Poor

Over: BORST VALLEY CREEK

0.1M N JCT STH 121, Trempealeau, WI

Built 1968 Load: 35.6 t ADT: 50

LRD RIVER STREET

Poor

Over: TREMPEALEAU RIVER

0.1M E JCT STH 93, Trempealeau, WI

Built 1984 Load: 37.3 t ADT: 231

USH 10-USH 53-10TH

Poor

Over: BUFFALO RIVER

0.9M E JCT CTH K, Trempealeau, WI

Built 1937 Load: 37.3 t ADT: 4,400

LRD LOGA RD

Poor

Over: ELK CREEK

0.3M N JCT CTH E, Trempealeau, WI

Built 1964 Load: 38.9 t ADT: 293

CTH E

Poor

Over: ELK CREEK

0.6M W JCT CTH EE, Trempealeau, WI

Built 1960 Load: 42.1 t ADT: 412

LRD WHALEN RD

Poor

Over: S FK BEAVER CREEK

0.2M N JCT CTH D, Trempealeau, WI

Built 1968 Load: 56.7 t ADT: 88

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

Related

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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.