County profile · official public datasets

Calumet County, WI

62 public highway bridges tracked in the FHWA National Bridge Inventory: 40.3% rated Good, 41.9% Fair, 17.7% Poor.

62
Public bridges
40.3%
Good condition
17.7%
Poor condition

The verdict

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

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

71st
of 72 on Poor share
17.7%
Poor-condition share
62
public highway bridges
1974
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.

Calumet County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Calumet County ranks #71 of 72 Wisconsin counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 17.7%). Calumet County, Wisconsin contains 62 public highway bridges. Roughly 40.3% are rated “Good,” 41.9% “Fair,” and 17.7% “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

62

Public highway bridges in Calumet County

Good condition

40.3%

25 of 62 rated 7-9

Fair condition

41.9%

26 of 62 rated 5-6

Poor condition

17.7%

11 of 62 rated 4 or below

In-state Poor-share rank

#71 of 72

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

Condition distribution

Share of 62 NBI-tracked bridges by lowest applicable component rating.

Good
40.3% (25)
Fair
41.9% (26)
Poor
17.7% (11)

Calumet County's Poor-condition bridges carry 20,234 vehicle crossings a day

That is 9.7% of the county's reported daily bridge traffic on 17.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,839 crossings a day against 3,049 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 62 of 62 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

43.5% of Calumet County's bridges have passed the 50-year mark

27 of the 62 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 40.3% 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 45.5% of the county's Poor-condition bridge traffic

USH 151-STH 32-STH over S BR MANITOWOC RIVER, built 1951, carries 9,200 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 11-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 20,234 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Calumet County's bridges were built

62 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 15 of the county's bridges still in the inventory were built, which is 24.2% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1974, 10 years older than the Wisconsin average of 1984.

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

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

The 5 Wisconsin counties nearest Calumet County in number of bridges, with their condition splits. Its 17.7% Poor share is the 6th-lowest of these 6. Its average build year of 1974 against a peer-group mean of 1984 is 10 years older.

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

Bridge inventory size and condition shares for Calumet County and the 5 Wisconsin counties closest to it in inventory size
County Bridges Poor
Burnett County 67 6%
Calumet County (this page) 62 17.7%
Oneida County 61 14.8%
Pepin County 57 7%
Forest County 53 13.2%
Waushara County 53 5.7%

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 Calumet 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 Calumet County, both outside Wisconsin so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside WI (62 bridges here).

Similar average build year

Nearest mean year-built outside WI (1974 here).

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

All 62 Good 25 Fair 26 Poor 11

Good-condition bridges (25)

LRD KILLSNAKE RD

Good

Over: BR KILLSNAKE RIVER

3.1M W JCT STH 57, Calumet, WI

Built 1925 Load: 21.1 t ADT: 211

CTH PP MAIN ST

Good

Over: SPRING CREEK

0.1M N JCT USH 10, Calumet, WI

Built 1972 Load: 24.3 t ADT: 2,900

LRD FRANCIS ST

Good

Over: SPRING CREEK

0.1M E JCT CTH PP, Calumet, WI

Built 1961 Load: 24.3 t ADT: 820

LRD LAKE SHORE DR

Good

Over: TRIB LAKE WINNEBAGO

2.0M S HARBOR ROAD, Calumet, WI

Built 1965 Load: 24.3 t ADT: 51

STH 32-STH 57

Good

Over: CMSTPP RR

1.3M N JCT STH 149 TO W, Calumet, WI

Built 1970 Load: 29.2 t ADT: 6,600

LRD KILLSNAKE RD

Good

Over: KILLSNAKE RIVER

0.6M W JCT STH 57, Calumet, WI

Built 1982 Load: 30.8 t ADT: 143

LRD HARBOR RD

Good

Over: LAKE WINNEBAGO TRIB

0.4M W JCT USH 151, Calumet, WI

Built 2008 Load: 32.4 t ADT: 1

LRD MUD CREEK RD

Good

Over: MUD CREEK

LOCATION UNKNOWN PLEASE, Calumet, WI

Built 2016 Load: 32.4 t ADT: 100

CTH PP

Good

Over: HILLBERT CREEK

1.73 MI E OF JCT STH 57, Calumet, WI

Built 2020 Load: 34.2 t ADT: 2,000

CTH Y

Good

Over: KILLSNAKE RIVER

1.0M S JCT CTH E, Calumet, WI

Built 1997 Load: 35.6 t ADT: 963

USH 151

Good

Over: STONY BROOK

AT STONY BROOK, Calumet, WI

Built 2005 Load: 35.6 t ADT: 2,500

STH 114

Good

Over: N BR MANITOWOC RIVER

0.9M E JCT CTH BB, Calumet, WI

Built 1991 Load: 37.3 t ADT: 4,800

USH 10-RYAN ST

Good

Over: SPRING CREEK

0.1M E JCT CTH PP, Calumet, WI

Built 1988 Load: 37.3 t ADT: 6,700

LRD LEMKE RD

Good

Over: S BR MANITOWOC RIVER

0.7M N JCT USH 151, Calumet, WI

Built 1993 Load: 37.3 t ADT: 102

LRD BOETTCHER RD

Good

Over: EAST RIVER

0.7M N JCT CTH K, Calumet, WI

Built 1991 Load: 37.3 t ADT: 128

LRD IRISH RD

Good

Over: KILLSNAKE RIVER

1.6M N JCT CTH Y, Calumet, WI

Built 1994 Load: 37.3 t ADT: 179

LRD NORTH COUNTY L

Good

Over: EAST RIVER

1.2M E JCT STH 57, Calumet, WI

Built 2023 Load: 37.3 t ADT: 864

CTH E

Good

Over: KILLSNAKE RIVER

0.1M W JCT STH 32/57, Calumet, WI

Built 2013 Load: 37.9 t ADT: 1,700

LRD WEEKS ROAD

Good

Over: S. BRANCH MANITOWOC RIVE

0.2M N OF USH 151, Calumet, WI

Built 2019 Load: 38.6 t ADT: 280

LRD EAST RIVERVIEW

Good

Over: N BR MANITOWOC RIVER

1.5M W JCT CTH JJ, Calumet, WI

Built 1985 Load: 38.9 t ADT: 436

CTH Y MAIN ST

Good

Over: S BR MANITOWOC RIVER

0.2M N JCT USH 151, Calumet, WI

Built 1988 Load: 38.9 t ADT: 1,400

STH 441 NB

Good

Over: LRD LAKE PARK ROAD

2.1M N JCT USH 10, Calumet, WI

Built 1993 Load: 40.5 t ADT: 19,350

STH 441 SB

Good

Over: LRD LAKE PARK ROAD

0.5M S JCT CTH KK, Calumet, WI

Built 1993 Load: 40.5 t ADT: 22,250

LRD HILBERT RD

Good

Over: BR SPRING CREEK

1.5M E JCT STH 57, Calumet, WI

Built 1992 Load: 42.1 t ADT: 102

LRD IRISH RD

Good

Over: S BR MANITOWOC RIVER

0.8M N JCT USH 151, Calumet, WI

Built 1999 Load: 71.3 t ADT: 1,653

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

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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.