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)

STH 138

Good

Over: BADFISH CREEK

0.3M N JCT STH 59, Rock, WI

Built 1992 Load: 42.1 t ADT: 3,700

LRD RILEY RD

Good

Over: BADFISH CREEK

0.2M S JCT STH 59, Rock, WI

Built 1995 Load: 42.1 t ADT: 38

STH 140

Good

Over: TURTLE CREEK

1.7M N JCT IH 43 TO N, Rock, WI

Built 2005 Load: 42.1 t ADT: 2,600

LRD JOHNSON DR

Good

Over: SOUTH BASS CR

3.7M N JCT STH 213, Rock, WI

Built 2003 Load: 42.1 t ADT: 275

IH 39 SB / IH 90 E

Good

Over: CNW RR

1.0M S JCT STH 11 TO W, Rock, WI

Built 2019 Load: 42.4 t ADT: 32,550

IH 39 NB / IH 90 W

Good

Over: CNW/UP RR

4.4M W JCT CTH S TO E, Rock, WI

Built 2018 Load: 42.4 t ADT: 32,550

LRD SOUTH MAIN STR

Good

Over: SPRING BROOK CREEK

0.6M S JCT STH 11, Rock, WI

Built 1990 Load: 43.7 t ADT: 3,900

STH 81-PORTLAND AV

Good

Over: ROCK RIVER

0.1M E JCT STH 213 TO N, Rock, WI

Built 1996 Load: 43.7 t ADT: 18,200

LRD CALEDONIA RD

Good

Over: BR YAHARA RIVER

3.0M W JCT STH 184, Rock, WI

Built 2008 Load: 43.7 t ADT: 104

STH 11

Good

Over: UNNAMED TRIBUTARY

1.5 M E JCT STH 213, Rock, WI

Built 2022 Load: 44.1 t ADT: 5,317

LRD DICKEY RD

Good

Over: SWAN CREEK

0.7M N JCT STH 11, Rock, WI

Built 1997 Load: 47.0 t ADT: 47

LRD ORFORDVILLE-HA

Good

Over: BR BASS CREEK

1.8M E JCT STH 213, Rock, WI

Built 1997 Load: 47.0 t ADT: 292

CTH H

Good

Over: MARSH CREEK

1.6M N JCT CTH A, Rock, WI

Built 2008 Load: 47.0 t ADT: 4,300

LRD EMERALD GROVE

Good

Over: BR TURTLE CREEK

3.0M S JCT USH 14, Rock, WI

Built 1997 Load: 51.8 t ADT: 88

LRD CALEDONIA RD

Poor

Over: YAHARA RIVER

1.2M W JCT STH 184, Rock, WI

Built 1966 Load: 19.4 t ADT: 215

LRD N FOOTVILLE RD

Poor

Over: BR STEVENS CREEK

1.5M S JCT CTH A, Rock, WI

Built 1980 Load: 19.4 t ADT: 23

USH 51-CENTER AVE

Poor

Over: CNW RR

11.3M N JCT STH 81, Rock, WI

Built 1982 Load: 24.3 t ADT: 14,600

LRD MILTON SHOPIER

Poor

Over: BR BLACKHAWK CREEK

0.4M S JCT CTH MM, Rock, WI

Built 1923 Load: 29.2 t ADT: 165

STH 213-4TH ST

Poor

Over: ROCK RIVER

0.1M N JCT USH 51, Rock, WI

Built 1962 Load: 32.4 t ADT: 5,700

CTH N

Poor

Over: OTTER CREEK

0.1M W JCT STH 26, Rock, WI

Built 1964 Load: 32.4 t ADT: 1,461

CTH J

Poor

Over: LITTLE TURTLE CREEK

1.3M E JCT CTH P, Rock, WI

Built 1976 Load: 34.0 t ADT: 270

CTH KK

Poor

Over: JOHNSTOWN CREEK

2.3M N JCT CTH M, Rock, WI

Built 1977 Load: 45.4 t ADT: 178

LRD CLEOPHAS RD

Structurally Deficient

Over: RACCOON CREEK

0.7M E JCT CTH K, Rock, WI

Built 1918 Load: 6.8 t ADT: 82

LRD ORILEY RD

Structurally Deficient

Over: TURTLE CREEK

2.0M N JCT CTH X, Rock, WI

Built 1963 Load: 13.0 t ADT: 293

LRD LATHERS RD

Structurally Deficient

Over: TURTLE CREEK

0.1M N JCT CTH S, Rock, WI

Built 1887 Load: 14.6 t ADT: 474

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