County profile · official public datasets

Pierce County, WI

248 public highway bridges tracked in the FHWA National Bridge Inventory: 64.5% rated Good, 31.9% Fair, 3.6% Poor.

248
Public bridges
64.5%
Good condition
3.6%
Poor condition

The verdict

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

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

Top 19%
lowest Poor share in state
3.6%
Poor-condition share
248
public highway bridges
1984
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.

Pierce County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Pierce County ranks #14 of 72 Wisconsin counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.6%). Pierce County, Wisconsin contains 248 public highway bridges. Roughly 64.5% are rated “Good,” 31.9% “Fair,” and 3.6% “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

248

Public highway bridges in Pierce County

Good condition

64.5%

160 of 248 rated 7-9

Fair condition

31.9%

79 of 248 rated 5-6

Poor condition

3.6%

9 of 248 rated 4 or below

In-state Poor-share rank

#14 of 72

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

Condition distribution

Share of 248 NBI-tracked bridges by lowest applicable component rating.

Good
64.5% (160)
Fair
31.9% (79)
Poor
3.6% (9)

Pierce County's Poor-condition bridges carry 5,832 vehicle crossings a day

That is 1.8% of the county's reported daily bridge traffic on 3.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 648 crossings a day against 926 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 248 of 248 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

22.2% of Pierce County's bridges have passed the 50-year mark

55 of the 248 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 64.5% 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 44.6% of the county's Poor-condition bridge traffic

STH 35 over BIG RIVER, built 1970, carries 2,600 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 9-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 5,832 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Pierce County's bridges were built

248 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 70 of the county's bridges still in the inventory were built, which is 28.2% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1984) matches the Wisconsin average (1984).

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

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

The 5 Wisconsin counties nearest Pierce County in number of bridges, with their condition splits. Its 3.6% Poor share is the 1st-lowest of these 6. Its average build year of 1984 against a peer-group mean of 1982 is in line with the group.

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

Bridge inventory size and condition shares for Pierce County and the 5 Wisconsin counties closest to it in inventory size
County Bridges Poor
Fond du Lac County 251 10.4%
La Crosse County 249 6%
Pierce County (this page) 248 3.6%
Dunn County 245 9%
Green County 244 8.6%
Sheboygan County 240 5.4%

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

Similar inventory size

Nearest county inventories outside WI (248 bridges here).

Similar average build year

Nearest mean year-built outside WI (1984 here).

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

All 248 Good 160 Fair 79 Poor 9

Good-condition bridges (160)

LRD 385TH ST

Good

Over: RUSH RIVER

0.1M S JCT CTH A, Pierce, WI

Built 1996 Load: 37.3 t ADT: 58

LRD PARK DRIVE (DE

Good

Over: BURQHARDT CREEK

0.1M W JCT STH 29, Pierce, WI

Built 2006 Load: 37.3 t ADT: 100

LRD 570TH AVE

Good

Over: DRY RUN COULEE CREEK

1.0M W JCT CTH QQ, Pierce, WI

Built 2005 Load: 37.3 t ADT: 100

LRD 740TH ST

Good

Over: BR TRIMBELLE RIVER

0.1M S JCT STH 65, Pierce, WI

Built 2005 Load: 37.3 t ADT: 179

LRD 90TH ST

Good

Over: BR BRUNNER VALLEY CREEK

0.4M N JCT CTH U, Pierce, WI

Built 2005 Load: 37.3 t ADT: 106

LRD 850TH STREET

Good

Over: S FK KINNICKINNIC RIVER

0.1M S JCT STH 29, Pierce, WI

Built 2004 Load: 37.3 t ADT: 537

CTH N

Good

Over: LOST CREEK

0.7M W JCT USH 63, Pierce, WI

Built 1988 Load: 37.3 t ADT: 494

LRD 590TH ST

Good

Over: S FK LOST CREEK

0.9M N JCT USH 63, Pierce, WI

Built 1988 Load: 37.3 t ADT: 16

CTH W

Good

Over: TRIMBELLE RIVER

0.7M E JCT STH 65, Pierce, WI

Built 2020 Load: 38.6 t ADT: 194

LRD 640TH AVE

Good

Over: TRIMBELLE RIVER

0.1M W JCT CTH J, Pierce, WI

Built 1987 Load: 38.9 t ADT: 67

STH 65

Good

Over: GOOSE CREEK

0.3M N JCT CTH J TO E, Pierce, WI

Built 1997 Load: 38.9 t ADT: 5,100

CTH S

Good

Over: RUSH COULEE CREEK

0.4M S JCT CTH U, Pierce, WI

Built 1994 Load: 38.9 t ADT: 927

LRD 620 TH STREET

Good

Over: BR ISABELLE CREEK

2.4M S JCT CTH V, Pierce, WI

Built 1994 Load: 38.9 t ADT: 44

LRD 810TH AVE

Good

Over: TRIMBELLE RIVER

0.1M N JCT CTH W, Pierce, WI

Built 1996 Load: 38.9 t ADT: 93

LRD 770TH AVE

Good

Over: CAVE CREEK

1.1M E JCT CTH BB, Pierce, WI

Built 2000 Load: 38.9 t ADT: 108

CTH HH

Good

Over: PLUM CREEK

1.3M E JCT CTH CC, Pierce, WI

Built 2002 Load: 38.9 t ADT: 144

LRD 810TH ST

Good

Over: SPRING CREEK

0.4M S JCT USH 10, Pierce, WI

Built 2005 Load: 38.9 t ADT: 223

LRD 890 TH AVE

Good

Over: BRANCH RUSH RIVER

.5M W JCT 510 ST, Pierce, WI

Built 2001 Load: 38.9 t ADT: 198

CTH F

Good

Over: KINNICKINNIC RIVER

AT KINNICKINNIC STATE PA, Pierce, WI

Built 2012 Load: 39.9 t ADT: 2,987

CTH EE

Good

Over: ISABELLE CREEK

2.6M W JCT CTH D, Pierce, WI

Built 1980 Load: 40.5 t ADT: 262

LRD 780TH AVE

Good

Over: RUSH RIVER

0.6M E JCT USH 63, Pierce, WI

Built 1989 Load: 40.5 t ADT: 91

LRD PINE AVE

Good

Over: PLUM CREEK

0.1M E JCT CTH S, Pierce, WI

Built 1987 Load: 40.5 t ADT: 256

LRD 465TH AVE

Good

Over: LOST CREEK

1.7M N JCT USH 10, Pierce, WI

Built 1990 Load: 40.5 t ADT: 34

USH 10

Good

Over: OAK GROVE CREEK

1.6M E JCT STH 29, Pierce, WI

Built 1998 Load: 40.5 t ADT: 4,600

LRD 730TH AVE

Good

Over: RUSH RIVER

1.4M E JCT USH 63, Pierce, WI

Built 1991 Load: 40.5 t ADT: 93

LRD 50TH STREET

Good

Over: BR CADY CREEK

2.3M N JCT CTH P, Pierce, WI

Built 1993 Load: 40.5 t ADT: 55

LRD 500TH AVE

Good

Over: WIND RIVER

0.8M E JCT CTH E, Pierce, WI

Built 1996 Load: 40.5 t ADT: 93

USH 10

Good

Over: RUSH RIVER

0.1M E JCT CTH A, Pierce, WI

Built 2001 Load: 40.5 t ADT: 2,500

LRD EAST BUSINESS

Good

Over: ISABELLE CREEK

0.1 M W JCT CTH C, Pierce, WI

Built 2000 Load: 40.5 t ADT: 107

LRD 760TH AVE

Good

Over: E BR RUSH RIVER

0.6M W JCT CTH N, Pierce, WI

Built 2006 Load: 40.5 t ADT: 126

CTH Y

Good

Over: BR RUSH RIVER

1.0M N JCT STH 29, Pierce, WI

Built 1991 Load: 40.5 t ADT: 772

LRD 610TH ST

Good

Over: DRAINAGE WAY

3.1M N JCT CTH N, Pierce, WI

Built 1994 Load: 40.5 t ADT: 168

STH 35

Good

Over: WIND RIVER

1.7M N JCT CTH OO, Pierce, WI

Built 1971 Load: 42.1 t ADT: 2,700

LRD 690TH AVE

Good

Over: CAVE CREEK

0.8M E JCT CTH BB, Pierce, WI

Built 1996 Load: 42.1 t ADT: 93

CTH O

Good

Over: TRIMBELLE RIVER

0.9MI SOUTH OF USH 10, Pierce, WI

Built 2003 Load: 42.1 t ADT: 244

CTH B MCCAY AVE

Good

Over: BURGHARDT CREEK

0.1M N JCT STH 29, Pierce, WI

Built 2006 Load: 42.1 t ADT: 1,313

LRD 630TH AVE

Good

Over: BR EAU GALLE RIVER

0.1M N JCT STH 72, Pierce, WI

Built 2008 Load: 42.1 t ADT: 104

CTH G

Good

Over: BR RUSH RIVER

0.1M W JCT CTH N TO W, Pierce, WI

Built 1986 Load: 42.1 t ADT: 267

LRD 10TH AVE

Good

Over: ELK CREEK

2.0M E JCT CTH SS, Pierce, WI

Built 1986 Load: 42.1 t ADT: 57

LRD 570TH AVE

Good

Over: DRY RUN

0.1M W JCT CTH O, Pierce, WI

Built 1986 Load: 42.1 t ADT: 57

LRD 730TH ST

Good

Over: DRY RUN

1.7M N JCT CTH C, Pierce, WI

Built 1989 Load: 42.1 t ADT: 56

CTH N

Good

Over: DRY RUN

0.5M W JCT USH 63, Pierce, WI

Built 1988 Load: 42.1 t ADT: 494

LRD 610TH STREET

Good

Over: BR LOST CREEK

1.5M N JCT USH 63, Pierce, WI

Built 1991 Load: 42.1 t ADT: 168

LRD 1090TH STREET

Good

Over: BR KINNICKINNIC RIVER

0.1M S JCT CTH FF, Pierce, WI

Built 1992 Load: 42.1 t ADT: 225

USH 63

Good

Over: BNSF RR

AT BNSF RR, Pierce, WI

Built 2013 Load: 43.4 t ADT: 9,600

CTH FF

Good

Over: GREENWOOD VALLEY CREEK

0.5M W JCT STH 29, Pierce, WI

Built 1999 Load: 43.7 t ADT: 504

CTH G

Good

Over: CAVE CREEK

0.6M E JCT CTH BB, Pierce, WI

Built 2020 Load: 44.7 t ADT: 327

USH 63

Good

Over: DRY RUN

0.6M N JCT STH 29 TO W, Pierce, WI

Built 2001 Load: 45.4 t ADT: 3,500

CTH V

Good

Over: BR ISABELLE CREEK

0.2M W JCT CTH DD TO N, Pierce, WI

Built 1993 Load: 45.4 t ADT: 566

LRD 113TH AVE

Good

Over: WARRENTOWN COULEE CR

0.2M W STH35, Pierce, WI

Built 2008 Load: 45.4 t ADT: 104

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.