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)

MONTAGUE RD

Fair

Over: E BR MOSQUITO CREEK

2 MI W MERIDIAN RD, Winnebago, IL

Built 1983 Load: 64.2 t ADT: 3,300

I-90

Fair

Over: STREAM

.1 MI N RIVERSIDE BL, Winnebago, IL

Built 1958 Load: 68.0 t ADT: 30,700

MERIDIAN RD

Fair

Over: UNNAMED CREEK

0.3 MI N STATE ST, Winnebago, IL

Built 1968 Load: 69.3 t ADT: 4,150

BEST ROAD

Fair

Over: PINK CREEK

0.7 MI S OF TRASK BR, Winnebago, IL

Built 1974 Load: 77.8 t ADT: 100

MERIDIAN RD

Fair

Over: S. BR. KENT CREEK

1.2 MI S OF 20 BR, Winnebago, IL

Built 1964 Load: 88.8 t ADT: 4,150

BRICK SCHOOL RD

Fair

Over: BEAVER RUN

0.7 MI E BARNINGHAM, Winnebago, IL

Built 1971 Load: 88.8 t ADT: 150

WHITE SCHOOL RD

Fair

Over: UNNAMED CREEK

0.4 MI N MCCURRY RD, Winnebago, IL

Built 1964 Load: 88.8 t ADT: 2,650

ALPINE ROAD

Fair

Over: DRAINAGE DITCH

0.1 M N WINDSOR, Winnebago, IL

Built 1972 Load: 88.8 t ADT: 16,800

SOUTH MAIN ST

Fair

Over: KENT CREEK

0.5 MI S OF STATE ST, Winnebago, IL

Built 1905 Load: 88.8 t ADT: 8,650

RED OAK LANE

Fair

Over: S BR KEITH CREEK

0.03 M N GUILFORD, Winnebago, IL

Built 1980 Load: 89.1 t ADT: 325

I-90

Fair

Over: STREAM

.97 MI S OF BELV. RD, Winnebago, IL

Built 1958 Load: 89.1 t ADT: 28,550

US 20

Fair

Over: DRAINAGE DITCH

.2 MI E MERIDIAN RD, Winnebago, IL

Built 1964 Load: 99.9 t ADT: 14,600

US 20

Fair

Over: KENT CREEK

1.3 MI E MERIDIAN RD, Winnebago, IL

Built 1964 Load: 99.9 t ADT: 14,600

I-90

Fair

Over: STREAM

1 MI NE OF ROSCOE, Winnebago, IL

Built 1958 Load: 99.9 t ADT: 28,550

GENOA ROAD

Good

Over: HACKEYS CREEK

0.1 MI E RIVER RD, Winnebago, IL

Built 1965 Load: 17.2 t ADT: 1,000

WEMPLETOWNROAD

Good

Over: BR N FORK KENT CR

0.5 MI N OF AUBURN R, Winnebago, IL

Built 1973 Load: 20.7 t ADT: 75

SMITH ROAD

Good

Over: COOLIDGE CREEK

1 MI E HOISINGTON RD, Winnebago, IL

Built 1970 Load: 21.7 t ADT: 1,050

PIERPONT AVE

Good

Over: S. BRANCH KENT CRK.

1.25 MI S OF STATE, Winnebago, IL

Built 1953 Load: 24.3 t ADT: 900

MILFORD AV

Good

Over: DRAINAGEWAY

0.3 MI W OF 11TH ST, Winnebago, IL

Built 1959 Load: 24.3 t ADT: 675

HANSON ST

Good

Over: S.E. DRAINAGEWAY

0.1 MI S HARRISON AV, Winnebago, IL

Built 1967 Load: 28.5 t ADT: 750

RAILROAD AVENUE

Good

Over: KEITH CREEK

0.03 MI W 9TH ST, Winnebago, IL

Built 2015 Load: 28.5 t ADT: 575

ROCKTON AVENUE

Good

Over: MUD CREEK

0.5 M S LATHAM ROAD, Winnebago, IL

Built 1981 Load: 29.2 t ADT: 675

RIVER ROAD

Good

Over: MAYBERRY CREEK

1.8 MI S GENOA ROAD, Winnebago, IL

Built 1998 Load: 29.5 t ADT: 175

BELL SCHOOL ROAD

Good

Over: KEITH CREEK

0.2 M N SPRING CR RD, Winnebago, IL

Built 1977 Load: 29.8 t ADT: 5,150

15TH STREET

Good

Over: KEITH CREEK

.2 MI S CHARLES ST, Winnebago, IL

Built 1996 Load: 29.8 t ADT: 600

CHER-OAK-WOOD LN

Good

Over: SPRING CREEK

0.1 MI N SPRINGBROOK, Winnebago, IL

Built 1966 Load: 30.1 t ADT: 425

BATES ROAD

Good

Over: GLEASON CREEK

0.8 MI S RT 75, Winnebago, IL

Built 1975 Load: 30.5 t ADT: 25

HARRISON AVE FR RD

Good

Over: MADIGAN CREEK

.2 MI E PERRYVIL RD, Winnebago, IL

Built 1963 Load: 31.1 t ADT: 800

MULFORD ROAD

Good

Over: SPRING CREEK

.01 N OF SPRINGBROOK, Winnebago, IL

Built 1964 Load: 31.1 t ADT: 18,300

BAXTER RD

Good

Over: UNNAMED CREEK

0.75 MI E OF IL 251, Winnebago, IL

Built 1974 Load: 31.1 t ADT: 2,850

STILLMAN VALLEY RO

Good

Over: CANAL CREEK

0.1 MI N CONDON ROAD, Winnebago, IL

Built 1977 Load: 31.1 t ADT: 300

FAP-525 (RvrSd Blv

Good

Over: Loves Park Creek

.2 MI E OF IL 251, Winnebago, IL

Built 2017 Load: 31.4 t ADT: 12,800

SPRINGFIELD AVE

Good

Over: CN RR

1/4 MI S CUNNINGHAM, Winnebago, IL

Built 2002 Load: 32.1 t ADT: 7,700

ILL 75

Good

Over: TIMOTHY CREEK

0.3 MI E MERIDIAN RD, Winnebago, IL

Built 2007 Load: 32.4 t ADT: 2,550

US RTE 20

Good

Over: COOLIDGE CREEK

4 MI E PECATONICA RD, Winnebago, IL

Built 2003 Load: 32.4 t ADT: 14,600

US BUS 20

Good

Over: DRAINAGE

.39 MI W MERIDIAN RD, Winnebago, IL

Built 2009 Load: 32.4 t ADT: 5,350

IL RTE 75

Good

Over: DRAINAGE

.11MI NE OWEN CENTER, Winnebago, IL

Built 2010 Load: 32.4 t ADT: 2,250

I-90

Good

Over: DRAINAGE

.13MI S PRAIRIE RD, Winnebago, IL

Built 2012 Load: 32.4 t ADT: 25,500

Forrest Hills Rd

Good

Over: DRAINAGE

470' N of IL 173, Winnebago, IL

Built 2014 Load: 32.4 t ADT: 10,400

SBI70/IL70 TRASK B

Good

Over: DRAINAGE DITCH

.2 MI E MERIDIAN RD, Winnebago, IL

Built 1991 Load: 32.4 t ADT: 4,600

ILL 173

Good

Over: DRAINAGE DITCH

.1 MI E OF ILL 251, Winnebago, IL

Built 2011 Load: 32.4 t ADT: 20,100

ORLANDO ST

Good

Over: DRAINAGE DITCH

.02MI N OF ILL 173, Winnebago, IL

Built 2011 Load: 32.4 t ADT: 5,500

STEPHENS RD

Good

Over: DRAINAGE

INTERSECTION @ HARRISON R, Winnebago, IL

Built 2023 Load: 32.4 t ADT: 200

FITZGERALD ROAD

Good

Over: ROCK CREEK

0.5 MI W PRAIRIE RD, Winnebago, IL

Built 1979 Load: 32.4 t ADT: 125

RIVERSIDE BLVD

Good

Over: KEITH CREEK

0.1 MI E PAULSON RD., Winnebago, IL

Built 1978 Load: 32.4 t ADT: 4,875

PAULSON ROAD

Good

Over: KEITH CREEK

0.08 MI S RIVERSIDE, Winnebago, IL

Built 1978 Load: 32.4 t ADT: 150

WINDSOR ROAD

Good

Over: DRAINAGE DITCH

0.1 M W ALPINE, Winnebago, IL

Built 1972 Load: 32.4 t ADT: 9,150

ALPINE ROAD

Good

Over: UNNAMED DRAINAGEWAY

0.1 MI S OF LINDEN RD, Winnebago, IL

Built 1985 Load: 32.4 t ADT: 6,600

ALPINE RD-FAP 412

Good

Over: S BR OF KEITH CR

.3 MI S OF STATE ST, Winnebago, IL

Built 2015 Load: 32.4 t ADT: 24,500

KISHWAUKEE ST

Good

Over: DRAINAGE DITCH

N OF SANDY HOLLOW RD, Winnebago, IL

Built 1992 Load: 32.4 t ADT: 7,750

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