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)

PEARL AVE

Good

Over: LOVES PARK CREEK

SOUTHWEST LOVES PARK, Winnebago, IL

Built 1974 Load: 32.4 t ADT: 1,150

RIVER LANE

Good

Over: LOVES PARK CREEK

E. OF IL 251, Winnebago, IL

Built 1995 Load: 32.4 t ADT: 1,950

WALKER AVE

Good

Over: LOVES PARK CREEK

N. OF CLIFFORD AVE, Winnebago, IL

Built 1996 Load: 32.4 t ADT: 575

JOHN STREET

Good

Over: LOVES PARK CREEK

N. OF CLIFFORD AVE, Winnebago, IL

Built 1996 Load: 32.4 t ADT: 150

GARDEN PLAIN ROAD

Good

Over: LOVES PARK CREEK

.07 mi N of Riversid, Winnebago, IL

Built 2012 Load: 32.4 t ADT: 350

EL RANCHO LN

Good

Over: SPRING CREEK

0.03 M S SPRING CR R, Winnebago, IL

Built 1977 Load: 33.0 t ADT: 500

MCDONALD ROAD

Good

Over: MCDONALD CREEK

0.3 M NW SWANSON RD, Winnebago, IL

Built 1983 Load: 34.3 t ADT: 2,250

FAIRVIEW AVE

Good

Over: SO BR OF KEITH CR

0.05 M S OF STATE ST, Winnebago, IL

Built 1986 Load: 34.3 t ADT: 7,900

RIVER ROAD

Good

Over: HACKEY CREEK

.2 MI S CHERRY VALLY, Winnebago, IL

Built 1995 Load: 34.7 t ADT: 225

HARRISON AVE W B

Good

Over: CN & UP RR

1 MI E OF IL 251, Winnebago, IL

Built 2007 Load: 34.7 t ADT: 16,100

WHEELER RD

Good

Over: UNNAMED CREEK

AT YALE BRIDGE RD, Winnebago, IL

Built 1990 Load: 35.0 t ADT: 450

Jefferson St

Good

Over: KENT CREEK

0.1 mi W. of Kilburn, Winnebago, IL

Built 1940 Load: 35.3 t ADT: 4,150

TELEGRAPH RD

Good

Over: COOLIDGE CREEK

4 MI NE OF PECATONCA, Winnebago, IL

Built 2014 Load: 35.6 t ADT: 950

HARRISON AVE E B

Good

Over: CN & UP RR

1 MI E OF IL 251, Winnebago, IL

Built 2009 Load: 35.6 t ADT: 16,100

IL 251

Good

Over: DRAINAGE DITCH

1.5 MI S US20 BYPASS, Winnebago, IL

Built 2019 Load: 36.0 t ADT: 7,600

CUNNINGHAM RD

Good

Over: SO BR KENT CREEK

0.25 MI E PIERPONT, Winnebago, IL

Built 2011 Load: 36.0 t ADT: 2,250

TIPPLE RD

Good

Over: ROCK CREEK

5 MI SE OF WINNEBAGO, Winnebago, IL

Built 2014 Load: 36.6 t ADT: 125

CLARK ROAD

Good

Over: UNNAMED CREEK

0.2 MI N STEWARD RD, Winnebago, IL

Built 1995 Load: 36.6 t ADT: 25

LAKESIDE DR

Good

Over: KILBURN CREEK

.5 MI N OF KILBURN, Winnebago, IL

Built 2010 Load: 36.6 t ADT: 50

7TH STREET

Good

Over: KEITH CREEK

0.6 MI S OF STATE, Winnebago, IL

Built 1986 Load: 36.9 t ADT: 3,550

SOUTH BEND RD

Good

Over: KILBUCK CR

1.1MI W OF IL 251, Winnebago, IL

Built 2010 Load: 37.3 t ADT: 475

CONDON ROAD

Good

Over: CANAL CREEK

0.3 MI E ROTHWELL RD, Winnebago, IL

Built 1976 Load: 37.6 t ADT: 275

OLIVER ROAD

Good

Over: RHULE CREEK

0.2 MI W HARRISON RD, Winnebago, IL

Built 1987 Load: 37.9 t ADT: 50

MILL ROAD

Good

Over: MADIGAN CREEK

1 MI E PERRYVILLE RD, Winnebago, IL

Built 2004 Load: 37.9 t ADT: 2,150

SEARLES AVE

Good

Over: NW DRAINAGEWAY

0.1 MI N OF GLENWOOD, Winnebago, IL

Built 1962 Load: 37.9 t ADT: 1,350

BLAIR ROAD

Good

Over: BR. PECATONICA RIVER

0.5 MI E STEPH CO LN, Winnebago, IL

Built 1992 Load: 38.2 t ADT: 50

IL 251 FR RD

Good

Over: DRY CREEK

.2 MI N MCCURRY RD, Winnebago, IL

Built 1992 Load: 38.6 t ADT: 850

GLEASMAN RD

Good

Over: UNNAMED

0.11 E OF RIVERVIEW, Winnebago, IL

Built 2022 Load: 38.6 t ADT: 1,400

HARRISON AVE

Good

Over: CONCRETE CHANNEL

.37 MI E OF 11TH ST, Winnebago, IL

Built 2016 Load: 38.6 t ADT: 16,300

Sumner Rd

Good

Over: Sumner Creek

1.5MI W PECATONICA, Winnebago, IL

Built 2017 Load: 38.9 t ADT: 325

PECATONICA RD

Good

Over: DRAINAGE DITCH

S. EDGE PECATONICA, Winnebago, IL

Built 1996 Load: 39.2 t ADT: 4,350

HOLVERSON RD

Good

Over: S BR OF OTTER CREEK

1MI W OF DURAND, Winnebago, IL

Built 2012 Load: 39.2 t ADT: 50

WELDON RD

Good

Over: UNNAMED STREAM

0.2 MI N OF US 20, Winnebago, IL

Built 1985 Load: 39.2 t ADT: 300

SEMINARY ST

Good

Over: KEITH CREEK

0.5 MI N OF 15TH AVE, Winnebago, IL

Built 2021 Load: 39.2 t ADT: 1,150

MONTAGUE RD

Good

Over: E BR MILL CRK

4 MI S OF WINNEBAGO, Winnebago, IL

Built 2012 Load: 39.5 t ADT: 1,900

STAGE COACH TRAIL

Good

Over: B N KENT CREEK

0.5 W OWEN CENTER RD, Winnebago, IL

Built 2003 Load: 39.5 t ADT: 575

BELVIDERE RD

Good

Over: MCDONALD CREEK

0.7 MI NW SWANSON RD, Winnebago, IL

Built 1979 Load: 39.9 t ADT: 3,950

BLACKHAWK RD

Good

Over: KISHWAUKEE RIVER

S. OF ROCKFORD, Winnebago, IL

Built 1996 Load: 40.2 t ADT: 3,450

ROCKTON ROAD

Good

Over: DRY RUN CREEK

0.3 MI E OF CH68, Winnebago, IL

Built 1976 Load: 40.2 t ADT: 750

FAIRVIEW BL

Good

Over: KEITH CREEK,NORTH BR

0.06 MI N STATE, Winnebago, IL

Built 1955 Load: 40.2 t ADT: 8,050

ROCKTON RD

Good

Over: ROCK RIVER

.4 MI W. OF ROCKTON, Winnebago, IL

Built 1990 Load: 40.5 t ADT: 2,200

SAMUELSON ROAD

Good

Over: UNNAMED DRAIN. DITCH

0.64 MI E OF 11TH ST, Winnebago, IL

Built 1977 Load: 40.5 t ADT: 3,000

BROOKVIEW RD

Good

Over: SPRING CREEK

0.1 M S SPRING CR RD, Winnebago, IL

Built 2009 Load: 40.8 t ADT: 500

CUNNINGHAM RD

Good

Over: S BR KENT CREEK

.1 MI E MERIDIAN RD, Winnebago, IL

Built 2016 Load: 40.8 t ADT: 1,750

KELLEY ROAD

Good

Over: GROVE CREEEK

0.2 MI W CONGER RD., Winnebago, IL

Built 1991 Load: 40.8 t ADT: 150

PERRYVILLE RD

Good

Over: KEITH CREEK

.2 MI N SPRING CR RD, Winnebago, IL

Built 1991 Load: 41.1 t ADT: 22,800

HARRISON ROAD

Good

Over: RHULE CREEK

2.8 MI S OF ILL 75, Winnebago, IL

Built 1989 Load: 41.5 t ADT: 250

PATTERSON RD

Good

Over: S. FORK OTTER CREEK

0.75 MI. N. IL 75, Winnebago, IL

Built 2001 Load: 41.5 t ADT: 275

MERCY WAY

Good

Over: KEITH CREEK

E. EDGE OF ROCKFORD, Winnebago, IL

Built 2017 Load: 41.8 t ADT: 1,150

BLOMBERG RD.

Good

Over: S BR KISHWAUKEE RIVR

AT RIVER ROAD, Winnebago, IL

Built 2003 Load: 42.1 t ADT: 725

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