County profile · official public datasets

Marquette County, WI

81 public highway bridges tracked in the FHWA National Bridge Inventory: 53.1% rated Good, 43.2% Fair, 3.7% Poor.

81
Public bridges
53.1%
Good condition
3.7%
Poor condition

The verdict

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

Marquette County posts a top-quartile lowest Poor-condition share among rated counties in the state across rated county bridge inventory.

Top 22%
lowest Poor share in state
3.7%
Poor-condition share
81
public highway bridges
1988
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.

Marquette County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Marquette County ranks #16 of 72 Wisconsin counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.7%). Marquette County, Wisconsin contains 81 public highway bridges. Roughly 53.1% are rated “Good,” 43.2% “Fair,” and 3.7% “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

81

Public highway bridges in Marquette County

Good condition

53.1%

43 of 81 rated 7-9

Fair condition

43.2%

35 of 81 rated 5-6

Poor condition

3.7%

3 of 81 rated 4 or below

In-state Poor-share rank

#16 of 72

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

Condition distribution

Share of 81 NBI-tracked bridges by lowest applicable component rating.

Good
53.1% (43)
Fair
43.2% (35)
Poor
3.7% (3)

Marquette County's Poor-condition bridges carry 1,062 vehicle crossings a day

That is 0.4% of the county's reported daily bridge traffic on 3.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 354 crossings a day against 3,336 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 81 of 81 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

16% of Marquette County's bridges have passed the 50-year mark

13 of the 81 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 53.1% 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 86.6% of the county's Poor-condition bridge traffic

CTH O over FOX RIVER, built 1961, carries 920 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 3-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 1,062 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Marquette County's bridges were built

81 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1980s, when 32 of the county's bridges still in the inventory were built, which is 39.5% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1988) matches the Wisconsin average (1984).

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

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

The 5 Wisconsin counties nearest Marquette County in number of bridges, with their condition splits. Its 3.7% Poor share is the 1st-lowest of these 6. Its average build year of 1988 against a peer-group mean of 1985 is in line with the group.

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

Bridge inventory size and condition shares for Marquette County and the 5 Wisconsin counties closest to it in inventory size
County Bridges Poor
Kewaunee County 93 5.4%
Ashland County 84 7.1%
Marquette County (this page) 81 3.7%
Langlade County 78 14.1%
Polk County 73 17.8%
Burnett County 67 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 Marquette 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 Marquette County, both outside Wisconsin so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside WI (81 bridges here).

Similar average build year

Nearest mean year-built outside WI (1988 here).

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

All 81 Good 43 Fair 35 Poor 3

Good-condition bridges (43)

LRD DIXIE AVE

Good

Over: MECAN RIVER

0.4M W JCT STH 22, Marquette, WI

Built 1979 Load: 24.3 t ADT: 80

LRD CHAUNCY ST

Good

Over: NEENAH CREEK

0.1M S JCT STH 82, Marquette, WI

Built 1984 Load: 29.2 t ADT: 360

IH USH51-IH39 NB

Good

Over: NEENAH CREEK

4.8M N JCT STH 78 TO S, Marquette, WI

Built 1984 Load: 30.8 t ADT: 15,800

IH USH51-IH39 NB

Good

Over: CTH O

6.7M N JCT STH 78 TO S, Marquette, WI

Built 1983 Load: 30.8 t ADT: 15,800

IH USH51-IH39 NB

Good

Over: CTH EAST SECOND ST/CTH J

6.5M N JCT STH 82, Marquette, WI

Built 1987 Load: 30.8 t ADT: 6,400

IH USH51-IH39 SB

Good

Over: CTH EAST SECOND ST(CTH J

5.0M S JCT CTH Z, Marquette, WI

Built 1987 Load: 30.8 t ADT: 6,400

LRD EDGEWOOD COURT

Good

Over: IH USH 51-IH 39

0.9M S JCT CTH J, Marquette, WI

Built 1987 Load: 32.4 t ADT: 200

IH USH51-IH39 NB

Good

Over: CTH Z

5.1M N JCT CTH J, Marquette, WI

Built 1987 Load: 32.4 t ADT: 6,650

STH 23

Good

Over: S BR NEENAH CREEK

0.3M E JCT CTH AA, Marquette, WI

Built 1981 Load: 32.4 t ADT: 1,800

STH 73-MAIN ST

Good

Over: WHITE RIVER

0.3M N JCT CTH E TO W, Marquette, WI

Built 1989 Load: 32.4 t ADT: 2,800

LRD WATER ST

Good

Over: MONTELLO RIVER

0.2M E JCT CTH J, Marquette, WI

Built 2001 Load: 32.4 t ADT: 100

LRD GROUSE DRIVE

Good

Over: IH USH 51-IH 39

AT JCT USH 51, Marquette, WI

Built 1984 Load: 34.0 t ADT: 120

CTH Z

Good

Over: CHAFEE CREEK

0.5 MI W JCT CTH Y, Marquette, WI

Built 2007 Load: 34.0 t ADT: 100

IH USH51-IH39 NB

Good

Over: LRD DOVER COURT

3.5M N JCT CTH J, Marquette, WI

Built 1987 Load: 35.6 t ADT: 13,000

CTH P

Good

Over: NEENAH CREEK

0.5M W JCT CTH O, Marquette, WI

Built 2004 Load: 35.6 t ADT: 160

LRD W 4TH ST/CTH E

Good

Over: WESTFIELD CREEK

0.7M W JCT USH 51, Marquette, WI

Built 2004 Load: 35.6 t ADT: 2,400

CTH CX

Good

Over: CHAPMAN CREEK

2.3M N JCT CTH P, Marquette, WI

Built 2023 Load: 35.6 t ADT: 800

LRD 11TH LANE

Good

Over: CHAFFEE CREEK

.2M N OF CTH Z, Marquette, WI

Built 2012 Load: 36.3 t ADT: 100

IH USH 51 - IH 39

Good

Over: STH 23/82 EB & WB

3.3M S JCT CTH M, Marquette, WI

Built 2016 Load: 36.3 t ADT: 14,700

IH USH51-IH39NB

Good

Over: CHAFFEE CREEK

1.6M N JCT CTH Z, Marquette, WI

Built 1987 Load: 37.3 t ADT: 6,650

CTH J

Good

Over: MONTELLO RIVER

0.3M S JCT CTH B TO N, Marquette, WI

Built 1990 Load: 37.3 t ADT: 770

LRD 14TH AVE

Good

Over: MECAN RIVER

1.5M S JCT CTH JJ, Marquette, WI

Built 1999 Load: 37.3 t ADT: 60

CTH N

Good

Over: MECAN RIVER

2.0M N JCT CTH J TO E, Marquette, WI

Built 1999 Load: 37.3 t ADT: 550

LRD 11TH RD

Good

Over: MONTELLO RIVER

0.8M N JCT CTH B, Marquette, WI

Built 1999 Load: 37.3 t ADT: 310

LRD EMBER LANE

Good

Over: MONTELLO RIVER

0.6M E JCT CTH B, Marquette, WI

Built 1998 Load: 37.3 t ADT: 55

CTH C

Good

Over: MECAN RIVER

1.3M S JCT STH 23, Marquette, WI

Built 2000 Load: 37.3 t ADT: 520

LRD 15TH DR

Good

Over: MECAN RIVER

0.3M S JCT CTH Y, Marquette, WI

Built 2004 Load: 37.3 t ADT: 50

CTH J

Good

Over: MECAN RIVER

0.6 M E JCT CTH N TO NORT, Marquette, WI

Built 2004 Load: 37.3 t ADT: 1,560

STH 23

Good

Over: MECAN RIVER

0.8M E JCT CTH N, Marquette, WI

Built 2020 Load: 37.3 t ADT: 3,000

IH USH51-IH39 NB

Good

Over: STH 23WB-STH 82EB

6.4M N JCT STH 23 TO W, Marquette, WI

Built 1986 Load: 38.9 t ADT: 7,350

LRD N MAIN ST

Good

Over: TRIBUTARY TO WESTFIELD C

0.7M W JCT USH 51 0.07M N, Marquette, WI

Built 2023 Load: 38.9 t ADT: 2,930

IH USH51-IH39 NB

Good

Over: LRD FAWN AVE

1.9M N JCT STH 23 TO E, Marquette, WI

Built 1986 Load: 40.5 t ADT: 12,800

CTH M

Good

Over: IH USH 51-IH 39

1.9M E JCT CTH J, Marquette, WI

Built 1987 Load: 40.5 t ADT: 1,900

IH USH51-IH 39 SB

Good

Over: LRD DOVER COURT

1.6M S JCT CTH Z, Marquette, WI

Built 1987 Load: 40.5 t ADT: 9,000

CTH CH

Good

Over: CAVES CR

1.4 M N JCT CTH M, Marquette, WI

Built 2002 Load: 40.5 t ADT: 1,000

CTH CH

Good

Over: TAGATZ CREEK

0.3M N OF DOVER, Marquette, WI

Built 2004 Load: 42.1 t ADT: 1,070

LRD 10TH ROAD

Good

Over: UNION PACIFIC RAILROAD

AT UNION PACIFIC RAILROAD, Marquette, WI

Built 2014 Load: 43.4 t ADT: 110

STH 23

Good

Over: NEENAH CREEK

2.4M E JCT CTH AA, Marquette, WI

Built 2000 Load: 43.7 t ADT: 1,200

LRD 4TH AVE

Good

Over: WESTFIELD CREEK

0.2M S JCT CTH A, Marquette, WI

Built 2001 Load: 43.7 t ADT: 160

LRD 14TH AVE

Good

Over: CHAFFEE CREEK

2.5M S JCT CTH JJ, Marquette, WI

Built 2000 Load: 43.7 t ADT: 80

CTH JJ

Good

Over: CHAFEE CREEK

1.6 M N JCT CTH Z, Marquette, WI

Built 2007 Load: 43.7 t ADT: 260

LRD 19TH COURT

Good

Over: LUNCH CREEK

1.6M N JCT CTH E, Marquette, WI

Built 2002 Load: 47.0 t ADT: 200

STH 23

Good

Over: OX CR

0.53M E CTH M, Marquette, WI

Built 2008 Load: 47.0 t ADT: 4,100

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.