Jefferson County, WI

186 public highway bridges

Jefferson County Bridge Snapshot

Jefferson County, Wisconsin contains 186 public highway bridges in the FHWA National Bridge Inventory. Roughly 31.2% are rated “Good,” 25.3% “Fair,” 4.8% “Poor,” and 4.8% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in WI are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

186
Total Bridges
31.2%
Good
4.8%
Poor
4.8%
Structurally Deficient

Condition Distribution

Good
31.2% (58)
Fair
25.3% (47)
Poor
4.8% (9)
SD
4.8% (9)

All Bridges (186)

LRD DIVISION ST

Fair

Over: ROCK RIVER

0.4M E JCT STH 109, Jefferson, WI

Built 1937 Load: 32.4 t ADT: 3,700

CTH F

Fair

Over: BARK RIVER

2.5M N JCT STH 106 TO E, Jefferson, WI

Built 1950 Load: 34.0 t ADT: 600

CTH F

Fair

Over: BARK RIVER

0.1M N JCT CTH P, Jefferson, WI

Built 1950 Load: 34.0 t ADT: 1,500

STH 19

Fair

Over: MAUNESHA RIVER

1.0M E JCT STH 89 TO S, Jefferson, WI

Built 1980 Load: 34.0 t ADT: 3,500

LRD FREMONT RD

Fair

Over: WHITEWATER RIVER

0.4M S JCT CTH U, Jefferson, WI

Built 1997 Load: 34.0 t ADT: 2,080

IH 94 WB

Fair

Over: ROCK CREEK

6.6M W JCT STH 26 TO N, Jefferson, WI

Built 1991 Load: 35.6 t ADT: 18,850

IH 94 WB

Fair

Over: ROCK RIVER

2.0M W JCT STH 26 TO N, Jefferson, WI

Built 1938 Load: 35.6 t ADT: 18,850

USH 12E-STH B26S-S

Fair

Over: ROCK RIVER

0.1M E JCT STH 106, Jefferson, WI

Built 1973 Load: 38.9 t ADT: 15,000

STH 16

Fair

Over: ROCK RIVER

1.0M E JCT CTH F, Jefferson, WI

Built 1975 Load: 38.9 t ADT: 7,800

STH 106

Fair

Over: KOSHKONONG CREEK

3.7M E JCT STH 73, Jefferson, WI

Built 2001 Load: 40.5 t ADT: 770

CTH P

Fair

Over: DUCK CREEK

0.6M S JCT USH 18, Jefferson, WI

Built 1998 Load: 42.1 t ADT: 274

CTH B

Fair

Over: JOHNSON CREEK

0.8M E JCT CTH X, Jefferson, WI

Built 1964 Load: 43.7 t ADT: 2,500

IH 94 WB

Fair

Over: CRAWFISH RIVER

4.5M W JCT STH 26 TO N, Jefferson, WI

Built 1938 Load: 45.4 t ADT: 18,850

LRD NORTHSIDE DRIV

Fair

Over: OCONOMOWOC RIVER

0.4M E JCT CTH E, Jefferson, WI

Built 1961 Load: 46.8 t ADT: 39

LRD ROCK RIVER RD

Fair

Over: BARK RIVER

0.3M S JCT STH 106, Jefferson, WI

Built 1977 Load: 47.0 t ADT: 1,500

LRD CHRISTBERG RD

Fair

Over: JOHNSON CREEK

3.8M S JCT CTH B, Jefferson, WI

Built 1985 Load: 47.0 t ADT: 103

USH 18

Fair

Over: KOSHKONONG CREEK

0.5M E JCT STH 134, Jefferson, WI

Built 2000 Load: 47.0 t ADT: 4,700

STH 106

Fair

Over: BR LAKE KOSHKONONG

1.0M E JCT CTH A, Jefferson, WI

Built 2001 Load: 47.0 t ADT: 1,300

CTH Y

Fair

Over: DUCK CREEK

0.7M E JCT CTH D, Jefferson, WI

Built 1983 Load: 50.2 t ADT: 850

CTH B

Good

Over: CRAWFISH RIVER

0.1M E JCT CTH Q, Jefferson, WI

Built 1967 Load: 22.7 t ADT: 3,000

USH 18

Good

Over: DUCK CREEK

0.4M E JCT CTH P, Jefferson, WI

Built 1964 Load: 25.9 t ADT: 1,800

LRD OCONOMOWOC AVE

Good

Over: ROCK RIVER

0.1M E JCT STH 26, Jefferson, WI

Built 1983 Load: 27.5 t ADT: 1,700

LRD OXBOW BEND DR

Good

Over: ROCK RIVER LAGOON

2.4M W JCT STH 26, Jefferson, WI

Built 1985 Load: 29.2 t ADT: 150

LRD ROCKVALE RD

Good

Over: BR ROCK RIVER

2.2M W JCT CTH P, Jefferson, WI

Built 1982 Load: 32.4 t ADT: 240

STH 106

Good

Over: SCUPPERNONG RIVER

2.7M E JCT CTH CI, Jefferson, WI

Built 1989 Load: 32.4 t ADT: 1,500

LRD LAKE DOROTHY L

Good

Over: JOHNSON CREEK

0.2M N JCT CTH B, Jefferson, WI

Built 1994 Load: 32.4 t ADT: 23

CTH Y

Good

Over: JOHNSON CREEK

0.2M S JCT STH 26, Jefferson, WI

Built 1993 Load: 32.4 t ADT: 1,700

LRD SWITZKE RD

Good

Over: JOHNSON CREEK

3.0M S JCT CTH B, Jefferson, WI

Built 1999 Load: 32.4 t ADT: 125

STH 106

Good

Over: ROCK RIVER

1.1M E JCT USH 12, Jefferson, WI

Built 2007 Load: 32.4 t ADT: 4,100

CTH E

Good

Over: BARK RIVER

2.2M S JCT USH 18, Jefferson, WI

Built 1981 Load: 32.4 t ADT: 1,600

LRD WILL ROAD

Good

Over: DEER CREEK

0.5M N JCT STH 106, Jefferson, WI

Built 2021 Load: 33.4 t ADT: 637

IH 94 EB

Good

Over: JOHNSON CREEK

4.0M E JCT STH 26 TO N, Jefferson, WI

Built 2020 Load: 33.7 t ADT: 21,400

IH 94 WB

Good

Over: JOHNSON CREEK

5.4M W JCT CTH F TO N, Jefferson, WI

Built 2020 Load: 33.7 t ADT: 21,400

LRD SKI SLIDE RD

Good

Over: SOO LINE RR

0.7M S JCT STH 16, Jefferson, WI

Built 1994 Load: 34.0 t ADT: 646

USH 18-RACINE ST

Good

Over: ROCK RIVER

2.2M E JCT STH 89 TO N, Jefferson, WI

Built 1998 Load: 34.0 t ADT: 6,100

STH 26 SB

Good

Over: UPRR

0.9 MI. S OF CTH B, Jefferson, WI

Built 2011 Load: 34.0 t ADT: 7,900

STH 26 NB

Good

Over: CRAWFISH R

0.2 M N JCT USH 18, Jefferson, WI

Built 2009 Load: 34.3 t ADT: 6,200

STH 26 SB

Good

Over: CRAWFISH R

0.2 M N JCT USH 18, Jefferson, WI

Built 2009 Load: 34.3 t ADT: 6,200

STH 26

Good

Over: JOHNSON CREEK

4.8M N JCT USH 18, Jefferson, WI

Built 2011 Load: 34.3 t ADT: 15,800

STH 26 NB

Good

Over: UPRR

2.2 MI. N OF N. MAIN STRE, Jefferson, WI

Built 2011 Load: 34.3 t ADT: 7,900

USH 12W-STH B26N-S

Good

Over: ROCK RIVER

0.1M W JCT USH 12 TO E, Jefferson, WI

Built 1997 Load: 35.6 t ADT: 12,300

LRD WEST PUERNER S

Good

Over: ROCK RIVER

CITY OF JEFFERSON, Jefferson, WI

Built 1998 Load: 35.6 t ADT: 2,354

CTH O

Good

Over: KOSHKONONG CR

1.7M S JCT CTH B, Jefferson, WI

Built 2006 Load: 35.6 t ADT: 1,160

LRD WEST RIVER RD

Good

Over: OCONOMOWOC RIVER

0.3M E JCT CTH E, Jefferson, WI

Built 2015 Load: 36.0 t ADT: 58

STH 26 NB

Good

Over: ROCK R

0.6 MI. N IF CTH Y, Jefferson, WI

Built 2010 Load: 36.3 t ADT: 4,500

STH 26 SB

Good

Over: ROCK R

0.6 MI. N OF CTH Y, Jefferson, WI

Built 2010 Load: 36.3 t ADT: 4,500

IH 94 EB

Good

Over: ROCK CREEK

1.2 MILES EAST JCT. STH 8, Jefferson, WI

Built 2020 Load: 36.6 t ADT: 18,850

LRD N HENDRICKS ST

Good

Over: MAUNESHA RIVER

0.3M N JCT STH 89, Jefferson, WI

Built 1989 Load: 37.3 t ADT: 170

STH 19/89-E MADISO

Good

Over: MAUNESHA RIVER

0.1M E JCT STH 89 TO N, Jefferson, WI

Built 1993 Load: 37.3 t ADT: 5,100

STH 19-W MADISON S

Good

Over: MAUNESHA RIVER

4.1M E JCT STH 73 TO N, Jefferson, WI

Built 2001 Load: 37.3 t ADT: 4,900

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

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial