Winnebago County, IL

475 public highway bridges

Winnebago County Bridge Snapshot

Winnebago County, Illinois contains 475 public highway bridges in the FHWA National Bridge Inventory. Roughly 27.8% are rated “Good,” 49.7% “Fair,” 6.1% “Poor,” and 6.1% 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 IL 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.

475

Total Bridges

27.8%

Good

6.1%

Poor

6.1%

Structurally Deficient

Condition Distribution

Good

27.8% (132)

Fair

49.7% (236)

Poor

6.1% (29)

SD

6.1% (29)

All Bridges (475)

Sort:

YALE BRIDGE RD

Over: RANDALLS CREEK

0.3 M E ANDERSON RD, Winnebago, IL

Built 1983 Load: 27.2 t ADT: 200

CEDAR ST

Over: KENT CREEK

0.41 M W OF MAIN, Winnebago, IL

Built 1985 Load: 27.2 t ADT: 1,500

I-90 S B

Over: STONEBRIDGE TRAIL

1 MI E OF ROSCOE, Winnebago, IL

Built 1958 Load: 27.2 t ADT: 28,550

SHIRLEY ROAD

Over: BR S BR KISHWAUKEE R

0.5 MI N EDSON ROAD, Winnebago, IL

Built 1963 Load: 27.9 t ADT: 75

WEMPLETOWN ROAD

Over: N FORK KENT CREEK

0.8 MI N AUBURN ROAD, Winnebago, IL

Built 1970 Load: 27.9 t ADT: 75

ROCK GROVE RD

Over: RANDALLS CREEK

0.2 M W EICKS RD, Winnebago, IL

Built 1982 Load: 29.2 t ADT: 475

18TH ST

Over: KEITH CREEK

ROCKFORD, Winnebago, IL

Built 1999 Load: 29.2 t ADT: 1,500

PECATONICA RD

Over: PEC. RIVER OV'FLOW

0.2 MI. N PECATONICA, Winnebago, IL

Built 1985 Load: 29.8 t ADT: 2,700

CUNNINGHAM RD

Over: UNNAMED CREEK

1.2 M E PCATONICA RD, Winnebago, IL

Built 1960 Load: 30.5 t ADT: 250

EDSON RD (TR 61 A)

Over: UNNAMED DITCH

5 MI S CHERRY VALLEY, Winnebago, IL

Built 1971 Load: 30.5 t ADT: 100

PARK AVE

Over: TURTLE CREEK

SOUTH BELOIT, Winnebago, IL

Built 1988 Load: 30.5 t ADT: 1,475

LIDDLE ROAD

Over: UNNAMED CREEK

0.3 MI N ROSCOE RD, Winnebago, IL

Built 1971 Load: 30.8 t ADT: 125

ROSCOE RD

Over: UNNAMED CREEK

AT CM&STP RR, Winnebago, IL

Built 1962 Load: 32.1 t ADT: 8,300

TELEGRAPH RD

Over: DRAINAGE DITCH

E EDGE PECATONICA, Winnebago, IL

Built 1935 Load: 32.4 t ADT: 1,400

ILL 75

Over: ROCK RIVER

IN ROCKTON, Winnebago, IL

Built 1927 Load: 32.4 t ADT: 7,200

I-39 & US 20

Over: MADIGAN CREEK

1 MI S OF I-90, Winnebago, IL

Built 1963 Load: 32.4 t ADT: 50,900

ARGYLE RD

Over: STREAM

0.7 MI S OF ILL 173, Winnebago, IL

Built 1983 Load: 32.4 t ADT: 5,750

ILL 2

Over: DRAINAGE DITCH

.75 MI N LATHAM RD, Winnebago, IL

Built 1989 Load: 32.4 t ADT: 9,950

IL 251 & RAMPS

Over: SPRING CREEK

.1 MI N SPRING CR RD, Winnebago, IL

Built 2002 Load: 32.4 t ADT: 29,700

IL RTE 70

Over: DRAINAGE DITCH

.4 MI E. MERIDIAN RD, Winnebago, IL

Built 2003 Load: 32.4 t ADT: 4,600

HARRISON AVE

Over: S.E. DRAINAGE WAY

AT 20TH STREET, Winnebago, IL

Built 1956 Load: 32.4 t ADT: 16,100

ALPINE ROAD

Over: PEBBLE CREEK

0.1 MI N RIVERSIDE, Winnebago, IL

Built 1972 Load: 32.4 t ADT: 16,700

WILD GINGER ROAD

Over: KEITH CR

.25 MI N GUILFORD RD, Winnebago, IL

Built 1973 Load: 32.4 t ADT: 775

EAST RIVERSIDE BLV

Over: SPRING CREEK

0.1 MI. W. OF I-90, Winnebago, IL

Built 1989 Load: 32.4 t ADT: 25,700

SPRING LAKE DR

Over: SPRING CREEK

.01 N OF SPRINGBROOK, Winnebago, IL

Built 1965 Load: 32.4 t ADT: 625

COACHMAN DRIVE

Over: KEITH CREEK

0.2 MI. N. GUILFORD, Winnebago, IL

Built 2004 Load: 32.4 t ADT: 150

W STATE ST

Over: KENT CR

0.06 MI W KILBURN, Winnebago, IL

Built 1979 Load: 32.4 t ADT: 6,400

KISHWAUKEE ST

Over: KEITH CREEK

0.12 N OF BROADWAY, Winnebago, IL

Built 2009 Load: 32.4 t ADT: 14,600

ELM AVE

Over: LOVES PARK CREEK

N. OF CLIFFORD AVE, Winnebago, IL

Built 1996 Load: 32.4 t ADT: 1,350

SWANSON DR

Over: S BR MCDONALD CRK

.2 MI S OF SWANSON R, Winnebago, IL

Built 2007 Load: 32.4 t ADT: 1,000

PERRYVILLE RD

Over: MADIGAN CR

AT CHARLES ST, Winnebago, IL

Built 1973 Load: 32.7 t ADT: 19,200

BRADLEY RD

Over: SPRING CREEK

0.07 M S SPRING CR R, Winnebago, IL

Built 1977 Load: 32.7 t ADT: 350

CLIFFORD AVE

Over: LOVES PARK CREEK

NORTHEAST LOVES PARK, Winnebago, IL

Built 1961 Load: 32.7 t ADT: 2,700

PECATONICA ROAD

Over: OTTER CREEK

0.1 MI S DURAND ROAD, Winnebago, IL

Built 1971 Load: 33.0 t ADT: 10

WHEELER RD

Over: OTTER CREEK

1 MI N FRITZ ROAD, Winnebago, IL

Built 2009 Load: 33.0 t ADT: 525

WINSLOW RD

Over: SUGAR CREEK

W EDGE OF SHIRLAND, Winnebago, IL

Built 1977 Load: 33.0 t ADT: 325

MINNS DRIVE

Over: WILLOW CREEK

.3 MI E. ALPINE RD, Winnebago, IL

Built 1990 Load: 33.0 t ADT: 750

ILL 2

Over: DRAINAGE DITCH

.05 S WISC ST LN, Winnebago, IL

Built 1958 Load: 34.0 t ADT: 13,000

ILL 251 N B

Over: DRY CREEK

.32 MI N MCCURRY RD, Winnebago, IL

Built 1967 Load: 34.0 t ADT: 16,600

ILL 251 S B

Over: DRY CREEK

.32 MI N MCCURRY RD, Winnebago, IL

Built 1967 Load: 34.0 t ADT: 16,600

AUBURN RD

Over: BR OF KENT CREEK

0.3 MI W OF MERIDIAN, Winnebago, IL

Built 1983 Load: 34.0 t ADT: 1,300

ILL 70

Over: DRAINAGE DITCH

.2 MI E OF LEECH RD, Winnebago, IL

Built 1932 Load: 34.3 t ADT: 3,000

HARLEM RD/BAUER PK

Over: ICE LINE RAILROAD

0.2 MI. E. OF IL 2, Winnebago, IL

Built 1989 Load: 34.3 t ADT: 11,300

PRAIRIE ROAD

Over: FULLERS CR

AT RT 20 BYPASS, Winnebago, IL

Built 1965 Load: 34.7 t ADT: 1,550

OLD RIVER RD

Over: BLACKS CREEK

0.7 MI N LATHAM RD, Winnebago, IL

Built 1962 Load: 34.7 t ADT: 2,850

ILL 251 & W. FR RD

Over: N.BRNCH WILLOW CREEK

0.25 S JCT ILL 173, Winnebago, IL

Built 1964 Load: 35.0 t ADT: 17,300

US 20 E B

Over: IL RR

.5 MI W OF ILL 251, Winnebago, IL

Built 1960 Load: 35.3 t ADT: 32,000

AUBURN ST

Over: ROCK RIVER

0.4 MI W OF ILL 251, Winnebago, IL

Built 1938 Load: 35.3 t ADT: 22,600

ILL 70

Over: S BRANCH OTTER CR

0.8 MI NORTH RT 75, Winnebago, IL

Built 2010 Load: 35.6 t ADT: 2,700

WINSLOW ROAD

Over: SUGAR RIVER

2 MI W OF SHIRLAND, Winnebago, IL

Built 1985 Load: 35.6 t ADT: 150

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026