Rock County, WI

325 public highway bridges

Rock County Bridge Snapshot

Rock County, Wisconsin contains 325 public highway bridges in the FHWA National Bridge Inventory. Roughly 36.9% are rated “Good,” 26.8% “Fair,” 3.4% “Poor,” and 3.4% 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.

325
Total Bridges
36.9%
Good
3.4%
Poor
3.4%
Structurally Deficient

Condition Distribution

Good
36.9% (120)
Fair
26.8% (87)
Poor
3.4% (11)
SD
3.4% (11)

All Bridges (325)

IH 39 SB/90 EB

Good

Over: CMSTPP RR / SPRING BROOK

0.6M E JCT IH 43 TO S, Rock, WI

Built 2021 Load: 36.3 t ADT: 29,550

IH 39 SB / IH 90 E

Good

Over: SPRING BROOK / SPRING BR

2.3M E JCT USH 14 TO E, Rock, WI

Built 2019 Load: 36.3 t ADT: 38,500

IH 39 NB / IH 90 W

Good

Over: SPRING BROOK / SPRING BR

PLEASE UPDATE LOCATION, Rock, WI

Built 2018 Load: 36.3 t ADT: 38,500

LRD INMAN PARKWAY

Good

Over: TURTLE CREEK

0.3 MI W JCT SHOPIERE RD, Rock, WI

Built 2016 Load: 36.6 t ADT: 5,100

LRD S SMITH RD

Good

Over: TURTLE CREEK

0.3M N JCT CTH J, Rock, WI

Built 2020 Load: 36.6 t ADT: 140

STH 26 NB

Good

Over: WSOR RR

0.3 MI. N OF STH 59, Rock, WI

Built 2013 Load: 36.9 t ADT: 13,900

STH 26 SB

Good

Over: WSOR RR

2 MI S CTH N, Rock, WI

Built 2013 Load: 36.9 t ADT: 13,900

IH 39 SB / IH 90 E

Good

Over: TURTLE CREEK

5.0M E JCT STH 11 TO W, Rock, WI

Built 2019 Load: 36.9 t ADT: 26,700

LRD HANOVER RD

Good

Over: MARKHAM CREEK

1.9M W JCT CTH D, Rock, WI

Built 2020 Load: 36.9 t ADT: 680

USH 51-E GRAND AVE

Good

Over: TURTLE CREEK

0.1M N ILLINOIS ST LINE, Rock, WI

Built 1997 Load: 37.3 t ADT: 12,400

LRD BELOIT-NEWARK

Good

Over: RACCOON CREEK

1.1M E JCT CTH K, Rock, WI

Built 1996 Load: 37.3 t ADT: 350

LRD WATER ST

Good

Over: ALLEN CREEK

0.1M E JCT STH 59, Rock, WI

Built 1996 Load: 37.3 t ADT: 2,250

LRD TUTTLE ROAD

Good

Over: MARSH CREEK

1.5M N JCT CTH A, Rock, WI

Built 1987 Load: 37.3 t ADT: 1

STH 11 WB

Good

Over: UNION PACIFIC RR

0.9M W JCT IH 90 TO E, Rock, WI

Built 2004 Load: 37.3 t ADT: 7,900

STH 11

Good

Over: TAYLOR CREEK

0.8M E JCT STH 104, Rock, WI

Built 2004 Load: 37.3 t ADT: 4,700

LRD CLEOPHAS RD

Good

Over: E FK RACCOON CREEK

1.9M E JCT CTH H, Rock, WI

Built 2006 Load: 37.3 t ADT: 104

CTH H

Good

Over: BRA COON CREEK

0.2M N JCT STH 81, Rock, WI

Built 2009 Load: 37.3 t ADT: 490

CTH H

Good

Over: BASS CREEK

4.0M N JCT STH 213, Rock, WI

Built 2017 Load: 37.3 t ADT: 803

IH 39 SB / IH 90 E

Good

Over: WIS & CALUMET RR

7.8M E JCT STH 59 TO E, Rock, WI

Built 2021 Load: 37.3 t ADT: 29,500

IH 39 NB/90 WB

Good

Over: WISCONSIN SOUTHERN RAILR

0.5M N JCT STH 26, Rock, WI

Built 2019 Load: 37.3 t ADT: 29,500

LRD GATEWAY BOULEV

Good

Over: SPRING BROOK CREEK

0.6M W JCT CTH X, Rock, WI

Built 2011 Load: 38.2 t ADT: 1,537

LRD RUGER AVENUE

Good

Over: SPRING BROOK

2.0M W JCT STH 11, Rock, WI

Built 2010 Load: 38.2 t ADT: 3,690

LRD DORNER RD

Good

Over: TAYLOR CREEK

3.2M E JCT CTH B, Rock, WI

Built 2012 Load: 38.2 t ADT: 50

LRD SCHAFFNER RD

Good

Over: BASS CREEK

1.4M E JCT STH 11, Rock, WI

Built 1994 Load: 38.9 t ADT: 38

LRD KLUG RD

Good

Over: OTTER CREEK

0.1M S JCT CTH N, Rock, WI

Built 1997 Load: 38.9 t ADT: 65

LRD FELLOWS RD

Good

Over: MARSH CREEK

1.5M N JCT CTH A, Rock, WI

Built 1997 Load: 38.9 t ADT: 170

STH 59

Good

Over: BADFISH CREEK

1.3M E JCT STH 138, Rock, WI

Built 2003 Load: 38.9 t ADT: 2,000

LRD N. EVANSVILLE-

Good

Over: BR ALLEN CREEK

0.6M N JCT CTH C, Rock, WI

Built 1996 Load: 38.9 t ADT: 328

LRD OLD HWY 92

Good

Over: BR ALLEN CREEK

1.3M N JCT STH 59, Rock, WI

Built 2004 Load: 38.9 t ADT: 214

IH 43 NB

Good

Over: CP RAILROAD AND SPRING B

0.5 MI S JCT STH 81, Rock, WI

Built 2020 Load: 38.9 t ADT: 8,350

CTH E

Good

Over: MARSH CREEK

0.7M S JCT USH 14, Rock, WI

Built 2023 Load: 39.2 t ADT: 3,148

IH 39NB/90 WB

Good

Over: CPRR / SPRING BROOK

1.9M W ILL STATE LINE, Rock, WI

Built 2020 Load: 39.5 t ADT: 29,550

LRD E MAIN ST

Good

Over: ALLEN CR

0.1M W JCT USH 14, Rock, WI

Built 2011 Load: 39.9 t ADT: 6,967

IH 39 NB/ IH 90 WB

Good

Over: WSOR RAILROAD

4.6M W JCT STH 26 TO N, Rock, WI

Built 2020 Load: 39.9 t ADT: 26,750

LRD SWIFT ST

Good

Over: SAUNDERS CREEK

0.3M N JCT STH 59, Rock, WI

Built 1992 Load: 40.5 t ADT: 1,800

LRD AVON RD

Good

Over: TAYLOR CREEK

0.3M E JCT CTH T, Rock, WI

Built 1993 Load: 40.5 t ADT: 189

LRD GRAND AVE

Good

Over: ROCK RIVER

0.1M N JCT IH 43, Rock, WI

Built 1993 Load: 40.5 t ADT: 5,100

LRD E COURT ST

Good

Over: ROCK RIVER

0.2M E JCT STH 11, Rock, WI

Built 1996 Load: 40.5 t ADT: 7,585

CTH J

Good

Over: BR ROCK RIVER

3.4M S JCT CTH O, Rock, WI

Built 1998 Load: 40.5 t ADT: 857

LRD STOUGHTON RD

Good

Over: BR SAUNDERS CREEK

0.6M N JCT STH 59, Rock, WI

Built 2003 Load: 40.5 t ADT: 642

LRD MARSH RD

Good

Over: BR BASS CREEK

0.3M S JCT CTH B, Rock, WI

Built 2004 Load: 40.5 t ADT: 214

LRD BELOIT-NEWARK

Good

Over: E FK RACCOON CREEK

1.8M E JCT CTH H, Rock, WI

Built 2003 Load: 40.5 t ADT: 795

LRD ST LAWRENCE RD

Good

Over: E FORK RACCOON CREEK

0.5M W PADDOCK RD, Rock, WI

Built 2008 Load: 40.5 t ADT: 861

LRD CRANSTON RD

Good

Over: TURTLE CREEK

0.4M N JCT IH 43, Rock, WI

Built 1964 Load: 40.5 t ADT: 15,500

LRD HAYNER RD

Good

Over: MARKHAM CREEK

2.8M S JCT STH 11, Rock, WI

Built 2012 Load: 40.8 t ADT: 203

LRD SKINNER RD

Good

Over: RACCOON CREEK

0.7M E JCT CTH K, Rock, WI

Built 2020 Load: 40.8 t ADT: 75

LRD EMERALD GROVE

Good

Over: WSOR RAILROAD

1.3M S JCT USH 14, Rock, WI

Built 2021 Load: 41.1 t ADT: 102

LRD 4TH ST

Good

Over: LENIGAN CREEK

0.5M N JCT STH 81, Rock, WI

Built 2017 Load: 41.5 t ADT: 4,700

STH 59 EB

Good

Over: WISCONSIN & SOUTHERN RR

AT WSOR, Rock, WI

Built 2009 Load: 41.8 t ADT: 4,700

STH 59 WB

Good

Over: WISCONSIN & SOUTHERN RR

AT WOSR, Rock, WI

Built 2009 Load: 41.8 t ADT: 4,700

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