County profile · official public datasets

Jackson County, WI

218 public highway bridges tracked in the FHWA National Bridge Inventory: 37.2% rated Good, 55% Fair, 7.8% Poor.

218
Public bridges
37.2%
Good condition
7.8%
Poor condition

The verdict

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

Jackson 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.

47th
of 72 on Poor share
7.8%
Poor-condition share
218
public highway bridges
1975
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.

Jackson County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Jackson County ranks #47 of 72 Wisconsin counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.8%). Jackson County, Wisconsin contains 218 public highway bridges. Roughly 37.2% are rated “Good,” 55% “Fair,” and 7.8% “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

218

Public highway bridges in Jackson County

Good condition

37.2%

81 of 218 rated 7-9

Fair condition

55%

120 of 218 rated 5-6

Poor condition

7.8%

17 of 218 rated 4 or below

In-state Poor-share rank

#47 of 72

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

Condition distribution

Share of 218 NBI-tracked bridges by lowest applicable component rating.

Good
37.2% (81)
Fair
55% (120)
Poor
7.8% (17)

Jackson County's Poor-condition bridges carry 18,068 vehicle crossings a day

That is 3.1% of the county's reported daily bridge traffic on 7.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,063 crossings a day against 1,974 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 218 of 218 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

50.5% of Jackson County's bridges have passed the 50-year mark

110 of the 218 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 37.2% 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 67.5% of the county's Poor-condition bridge traffic

IH 94 WB over UNION PACIFIC RR, built 1968, carries 12,200 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 17-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 18,068 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Jackson County's bridges were built

218 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 50 of the county's bridges still in the inventory were built, which is 22.9% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1975, 9 years older than the Wisconsin average of 1984.

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

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

The 5 Wisconsin counties nearest Jackson County in number of bridges, with their condition splits. Its 7.8% Poor share is the 5th-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1984 is 9 years older.

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

Bridge inventory size and condition shares for Jackson County and the 5 Wisconsin counties closest to it in inventory size
County Bridges Poor
Jackson County (this page) 218 7.8%
Lafayette County 217 8.3%
Dodge County 212 4.2%
Crawford County 211 5.2%
Iowa County 209 5.7%
Walworth County 206 3.9%

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

Similar inventory size

Nearest county inventories outside WI (218 bridges here).

Similar average build year

Nearest mean year-built outside WI (1975 here).

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

All 218 Good 81 Fair 120 Poor 17

Good-condition bridges (81)

LRD S SAND LANE RD

Good

Over: S FK BUFFALO RIVER

0.2M N JCT CTH B, Jackson, WI

Built 1997 Load: 38.9 t ADT: 36

LRD ERICKSON RD (D

Good

Over: S FK BEAVER CREEK

0.2M N JCT CTH D, Jackson, WI

Built 1999 Load: 38.9 t ADT: 30

LRD JOOS RD

Good

Over: BR S FK HALLS CREEK

0.3M W JCT CTH F, Jackson, WI

Built 2002 Load: 38.9 t ADT: 54

LRD FALLHALL RD

Good

Over: ROBINSON CREEK

0.6M S JCT STH 27, Jackson, WI

Built 2004 Load: 38.9 t ADT: 105

CTH X

Good

Over: FRENCH CREEK

1.1 MI S OF JCT CTH P, Jackson, WI

Built 2005 Load: 38.9 t ADT: 230

STH 95

Good

Over: HALLS CREEK

3.4M E JCT CTH F, Jackson, WI

Built 2023 Load: 38.9 t ADT: 2,400

CTH G

Good

Over: S FK BUFFALO RIVER

0.2M N JCT CTH B, Jackson, WI

Built 2020 Load: 39.5 t ADT: 130

IH 94 EB

Good

Over: LRD LAMBERT RD

7.3M E JCT STH 54 TO E, Jackson, WI

Built 1968 Load: 40.5 t ADT: 12,200

CTH VV

Good

Over: BLACK RIVER CHANNEL

1.7M S JCT STH 54, Jackson, WI

Built 1985 Load: 40.5 t ADT: 510

LRD HOGG STREET

Good

Over: DOUGLAS CREEK

0.2M E JCT STH 54, Jackson, WI

Built 1991 Load: 40.5 t ADT: 247

LRD LINCOLN ROAD

Good

Over: PINE CREEK

1.1M N JCT CTH P, Jackson, WI

Built 1994 Load: 40.5 t ADT: 47

LRD SANDBERG RD

Good

Over: MILL CREEK

0.2M N JCT STH 54, Jackson, WI

Built 1997 Load: 40.5 t ADT: 163

LRD SPERBER RD

Good

Over: N FORK BUFFALO RIVER

.1 M N USH 10, Jackson, WI

Built 1997 Load: 40.5 t ADT: 1

LRD S DAVIS RD

Good

Over: PINE CREEK

1.0M S JCT STH 95, Jackson, WI

Built 1999 Load: 40.5 t ADT: 1

USH 12-STH 27-HAMM

Good

Over: HALLS CREEK

0.4M E JCT STH 95 (F), Jackson, WI

Built 2003 Load: 40.5 t ADT: 1,800

LRD W KENYON RD

Good

Over: BR SQUAW CREEK

2.8M W JCT STH 54, Jackson, WI

Built 2018 Load: 40.5 t ADT: 50

LRD MOE ROAD (EAST

Good

Over: NORTH FORK BUFFALO RIVER

0.2 MI NORTH OF JUNCTION, Jackson, WI

Built 2022 Load: 40.5 t ADT: 100

CTH H

Good

Over: DOUGLAS CREEK

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

Built 2018 Load: 41.5 t ADT: 195

CTH X

Good

Over: TROUT RUN CREEK

0.6M W JCT CTH H TO SOUTH, Jackson, WI

Built 2020 Load: 41.5 t ADT: 265

LRD ANDREWS ROAD

Good

Over: COFFEE CREEK

.2 MI NORTH US HWY 12, Jackson, WI

Built 2020 Load: 41.5 t ADT: 1,700

CTH VV

Good

Over: WILSON CREEK

0.8M S JCT STH 54, Jackson, WI

Built 1994 Load: 42.1 t ADT: 510

IH 94 WB

Good

Over: TREMPEALEAU RIVER

0.2M W JCT STH 95 TO E, Jackson, WI

Built 1966 Load: 43.7 t ADT: 12,700

LRD KNUTES RD

Good

Over: TRIB OF BLACK RIVER

0.20 MILE EAST OF PRAY RD, Jackson, WI

Built 1999 Load: 43.7 t ADT: 1

CTH X

Good

Over: FRENCH CREEK

2.3M S OF JCT CTH P, Jackson, WI

Built 2008 Load: 43.7 t ADT: 230

LRD SUNNY VALE RD

Good

Over: ROARING CREEK

0.5M S JCT STH 54, Jackson, WI

Built 1982 Load: 43.7 t ADT: 23

CTH B

Good

Over: BUFFALO CREEK

1.5M E JCT CTH T, Jackson, WI

Built 1994 Load: 45.4 t ADT: 190

LRD KELLY RD

Good

Over: STONY CREEK

1.1M N JCT CTH O, Jackson, WI

Built 1997 Load: 47.0 t ADT: 40

USH 12

Good

Over: ROBINSON CREEK

11.6M E JCT STH 27 TO S, Jackson, WI

Built 2004 Load: 47.0 t ADT: 1,700

USH 10

Good

Over: COON CREEK

4.3M E JCT CTH T, Jackson, WI

Built 2008 Load: 48.6 t ADT: 3,100

USH 12

Good

Over: COFFEE CR (DEPOT CR)

7.8M E JCT STH 27, Jackson, WI

Built 2008 Load: 68.0 t ADT: 9,200

CTH A

Good

Over: BR TOWN CREEK

2.1M W JCT USH 12, Jackson, WI

Built 1947 Load: 92.3 t ADT: 436

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.