Total bridges
182
Public highway bridges in Jefferson County
County profile · official public datasets
Jefferson County, WI
182 public highway bridges tracked in the FHWA National Bridge Inventory: 57.1% rated Good, 37.4% Fair, 5.5% Poor.
- 182
- Public bridges
- 57.1%
- Good condition
- 5.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Jefferson County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 42%
- lowest Poor share in state
- 5.5%
- Poor-condition share
- 182
- 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.
Jefferson County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Jefferson County ranks #30 of 72 Wisconsin counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5.5%). Jefferson County, Wisconsin contains 182 public highway bridges. Roughly 57.1% are rated “Good,” 37.4% “Fair,” and 5.5% “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.
Good condition
57.1%
104 of 182 rated 7-9
Fair condition
37.4%
68 of 182 rated 5-6
Poor condition
5.5%
10 of 182 rated 4 or below
In-state Poor-share rank
#30 of 72
Among Wisconsin counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 182 NBI-tracked bridges by lowest applicable component rating.
Good 57.1% (104)
Fair 37.4% (68)
Poor 5.5% (10)
Jefferson County's Poor-condition bridges carry 38,940 vehicle crossings a day
That is 3.6% of the county's reported daily bridge traffic on 5.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 3,894 crossings a day against 5,496 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 182 of 182 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
34.6% of Jefferson County's bridges have passed the 50-year mark
63 of the 182 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 57.1% 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 49.2% of the county's Poor-condition bridge traffic
IH 94 WB over LRD ROCK LAKE RD, built 1965, carries 19,150 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 10-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 38,940 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Jefferson County's bridges were built
182 bridges with a recorded construction year, grouped by decade
- 1920s 1
1920–1929
1 bridges
- 1930s 8
1930–1939
8 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s 12
1950–1959
12 bridges
- 1960s
1960–1969
33 bridges
- 1970s 7
1970–1979
7 bridges
- 1980s 14
1980–1989
14 bridges
- 1990s
1990–1999
25 bridges
- 2000s
2000–2009
25 bridges
- 2010s
2010–2019
44 bridges
- 2020s 8
2020–2029
8 bridges
What this shows Construction peaked in the 2010s, when 44 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 5 to 14 years old in the 2024 inventory. Its average build year (1987) matches the Wisconsin average (1984).
How Jefferson County compares with Wisconsin's closest counties by inventory size
The 5 Wisconsin counties nearest Jefferson County in number of bridges, with their condition splits. Its 5.5% Poor share is the 4th-lowest of these 6. Its average build year of 1987 against a peer-group mean of 1984 is in line with the group.
Showing the 5 closest of 71 Wisconsin counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Columbia County | 183 | 30.1% | 63.9% | 6% | 1977 |
| Portage County | 182 | 53.3% | 44% | 2.7% | 1991 |
| Jefferson County (this page) | 182 | 57.1% | 37.4% | 5.5% | 1987 |
| Taylor County | 176 | 58.5% | 30.1% | 11.4% | 1988 |
| Juneau County | 172 | 49.4% | 47.7% | 2.9% | 1981 |
| Waupaca County | 169 | 76.3% | 20.7% | 3% | 1984 |
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 Jefferson 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 Jefferson County, both outside Wisconsin so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside WI (182 bridges here).
- Logan County, CO · 182 bridges
- Ida County, IA · 182 bridges
- Wright County, IA · 182 bridges
- Pulaski County, KY · 182 bridges
Similar average build year
Nearest mean year-built outside WI (1987 here).
- St. Louis County, MO · avg 1987 · 912 bridges
- Ellis County, TX · avg 1987 · 691 bridges
- St. Louis County, MN · avg 1987 · 663 bridges
- Palm Beach County, FL · avg 1987 · 610 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (182)
CTH P
FairOver: ROCK RIVER
0.2M N JCT CTH E, Jefferson, WI
Built 1949 Load: 14.6 t ADT: 1,002
LRD SWITZKE RD (DE
FairOver: IH 94
0.7M N JCT CTH B, Jefferson, WI
Built 1964 Load: 16.2 t ADT: 292
CTH D
FairOver: IH 94
0.7M N JCT CTH B, Jefferson, WI
Built 1964 Load: 16.2 t ADT: 590
CTH O
FairOver: IH 94
2.1M N JCT CTH B, Jefferson, WI
Built 1964 Load: 16.2 t ADT: 510
CTH A
FairOver: CRAWFISH RIVER
0.1M E JCT CTH Q, Jefferson, WI
Built 1948 Load: 17.8 t ADT: 2,900
CTH CW
FairOver: ROCK RIVER
2.8M W JCT STH 67, Jefferson, WI
Built 1953 Load: 19.4 t ADT: 1,477
LRD KUNZ RD
FairOver: BR ROCK RIVER
0.1M N JCT STH 106, Jefferson, WI
Built 1937 Load: 19.4 t ADT: 107
USH 18
FairOver: CRAWFISH RIVER
1.2M E JCT STH 89 TO N, Jefferson, WI
Built 1940 Load: 21.1 t ADT: 5,400
LRD ROCKVALE RD
FairOver: ROCK RIVER
0.7M E JCT CTH F, Jefferson, WI
Built 1971 Load: 21.1 t ADT: 293
LRD CADY ST
FairOver: ROCK RIVER
0.2M E JCT STH 26 BUSINES, Jefferson, WI
Built 1938 Load: 21.1 t ADT: 4,200
LRD ZIEBELL RD
FairOver: IH 94
1.2M S JCT CTH A, Jefferson, WI
Built 1964 Load: 22.7 t ADT: 474
CTH E JEFFERSON ST
FairOver: SCUPPERNONG RIVER
0.4M N JCT STH 135, Jefferson, WI
Built 1974 Load: 22.7 t ADT: 1,100
LRD AIRPORT RD
FairOver: IH 94
1.7M N JCT CTH B, Jefferson, WI
Built 1964 Load: 24.3 t ADT: 110
CTH B
FairOver: ROCK RIVER
0.7M E JCT CTH N, Jefferson, WI
Built 1968 Load: 24.3 t ADT: 4,100
LRD ROCK RIVER RD
FairOver: ROCK RIVER
0.1M N JCT STH 16, Jefferson, WI
Built 1985 Load: 24.3 t ADT: 185
LRD BETCHLER RD
FairOver: DUCK CREEK
0.2M N JCT CTH Y, Jefferson, WI
Built 1940 Load: 24.3 t ADT: 23
CTH U
FairOver: WHITEWATER RIVER
0.8M E JCT CTH N, Jefferson, WI
Built 1955 Load: 24.3 t ADT: 2,600
LRD PIPER RD
FairOver: STEEL BROOK
2.1M E JCT CTH D, Jefferson, WI
Built 1964 Load: 24.3 t ADT: 176
LRD FREMONT RD
FairOver: WHITEWATER RIVER
0.1M E JCT CTH N, Jefferson, WI
Built 1950 Load: 24.3 t ADT: 411
STH 89
FairOver: IH 94
0.2M N JCT CTH V, Jefferson, WI
Built 1964 Load: 25.9 t ADT: 11,100
CTH N
FairOver: IH 94
0.9M N JCT CTH B, Jefferson, WI
Built 1964 Load: 25.9 t ADT: 671
CTH E
FairOver: IH 94
1.2M N JCT CTH F, Jefferson, WI
Built 1964 Load: 25.9 t ADT: 5,040
STH 59
FairOver: SCUPPERNONG CREEK
0.1M E JCT CTH H TO N, Jefferson, WI
Built 1964 Load: 25.9 t ADT: 3,600
STH 59
FairOver: STEEL BROOK
3.0M E JCT CTH D, Jefferson, WI
Built 1970 Load: 25.9 t ADT: 3,606
STH 26 NB
FairOver: LRD BLACKHAWK ISLAND ROA
1.1M N JCT STH B 26, Jefferson, WI
Built 1994 Load: 25.9 t ADT: 7,000
STH 19
FairOver: CRAWFISH RIVER
0.2M E JCT CTH G, Jefferson, WI
Built 1976 Load: 27.5 t ADT: 3,600
LRD SKI-SLIDE RD
FairOver: ASHIPPUN RIVER
0.5M S JCT CTH CW, Jefferson, WI
Built 1988 Load: 27.5 t ADT: 400
CTH N
FairOver: BARK RIVER
0.8M N JCT CTH M, Jefferson, WI
Built 1939 Load: 27.5 t ADT: 3,500
CTH F
FairOver: ROCK RIVER
3.9M N JCT IH 94 TO E, Jefferson, WI
Built 1950 Load: 29.2 t ADT: 5,000
IH 94 EB
FairOver: LRD ROCK LAKE RD
8.0M E JCT STH 73 TO N, Jefferson, WI
Built 1964 Load: 29.2 t ADT: 19,150
IH 94 EB
FairOver: ROCK RIVER
5.8M E JCT STH 89 TO N, Jefferson, WI
Built 1964 Load: 29.2 t ADT: 18,850
CTH F
FairOver: IH 94
0.5M N JCT CTH E, Jefferson, WI
Built 1963 Load: 29.2 t ADT: 6,888
IH 94 EB
FairOver: CNW RR
7.1M E JCT STH 89 TO N, Jefferson, WI
Built 1958 Load: 30.8 t ADT: 17,900
IH 94 WB
FairOver: CNW RR
0.7M W JCT STH 26 TO N, Jefferson, WI
Built 1958 Load: 30.8 t ADT: 17,900
IH 94 EB
FairOver: LRD NEWVILLE RD
6.7M E JCT STH 73 TO N, Jefferson, WI
Built 1964 Load: 30.8 t ADT: 19,150
IH 94 WB
FairOver: LRD NEWVILLE RD
2.6M W JCT STH 89 TO N, Jefferson, WI
Built 1965 Load: 30.8 t ADT: 19,150
IH 94 EB
FairOver: LRD WILLOW GLEN RD
2.1M E JCT STH 135 TO N, Jefferson, WI
Built 1963 Load: 30.8 t ADT: 24,600
STH 16 EB
FairOver: STH 19 WB
1.8M E JCT CTH R, Jefferson, WI
Built 1960 Load: 32.4 t ADT: 1,100
IH 94 EB
FairOver: CRAWFISH RIVER
3.3M E JCT STH 89 TO N, Jefferson, WI
Built 1964 Load: 32.4 t ADT: 18,850
STH 106
FairOver: MUD CREEK
2.5M E JCT CTH CI, Jefferson, WI
Built 1962 Load: 32.4 t ADT: 1,500
IH 94 WB
FairOver: LRD WILLOW GLEN RD
4.4M W JCT STH 67 TO N, Jefferson, WI
Built 1963 Load: 32.4 t ADT: 24,600
STH 19-MAIN ST
FairOver: ROCK RIVER
0.8M E JCT CTH R, Jefferson, WI
Built 1994 Load: 32.4 t ADT: 10,339
STH 26
FairOver: ALLEN CREEK
0.2M N JCT STH 106, Jefferson, WI
Built 1994 Load: 32.4 t ADT: 13,400
LRD COFFEE RD
FairOver: JOHNSON CREEK
0.8M E JCT CTH X, Jefferson, WI
Built 1999 Load: 32.4 t ADT: 250
LRD DIVISION ST
FairOver: ROCK RIVER
0.4M E JCT STH 109, Jefferson, WI
Built 1937 Load: 32.4 t ADT: 3,700
CTH F
FairOver: BARK RIVER
2.5M N JCT STH 106 TO E, Jefferson, WI
Built 1950 Load: 34.0 t ADT: 600
CTH F
FairOver: BARK RIVER
0.1M N JCT CTH P, Jefferson, WI
Built 1950 Load: 34.0 t ADT: 1,500
STH 19
FairOver: MAUNESHA RIVER
1.0M E JCT STH 89 TO S, Jefferson, WI
Built 1980 Load: 34.0 t ADT: 3,500
LRD FREMONT RD
FairOver: WHITEWATER RIVER
0.4M S JCT CTH U, Jefferson, WI
Built 1997 Load: 34.0 t ADT: 2,080
IH 94 WB
FairOver: ROCK CREEK
6.6M W JCT STH 26 TO N, Jefferson, WI
Built 1991 Load: 35.6 t ADT: 18,850
Read our methodology - how this data is sourced, computed, and verified.
Related
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.