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:

LOVE ROAD

Over: DRY RUN CREEK

0.5 MI S ROCKTON RD, Winnebago, IL

Built 1960 Load: 20.4 t ADT: 1,700

FOREST PRESERVE RD

Over: SUGAR CREEK

0.8 MI E HAULEY RD, Winnebago, IL

Built 1937 Load: 21.4 t ADT: 450

SEMINARY STREET

Over: CN RR

S CENTRAL ROCKFORD, Winnebago, IL

Built 1901 Load: 21.4 t ADT: 1,150

YALE BRIDGE RD

Over: SUGAR RIVER

1.7 MI E WHEELER RD, Winnebago, IL

Built 1953 Load: 21.7 t ADT: 325

CEMETERY ROAD

Over: UNAMD CREEK DITCH

2.64 MI E OF ILL 70, Winnebago, IL

Built 1954 Load: 21.7 t ADT: 575

ILL 2 S B

Over: ROCK RIVER

0.1 M S HONONEGAH RD, Winnebago, IL

Built 1966 Load: 22.4 t ADT: 8,550

IL 2 N B

Over: ROCK RIVER

0.1 M S HONONEGAH RD, Winnebago, IL

Built 1966 Load: 22.4 t ADT: 8,550

ROTHWELL ROAD

Over: BR OF CANAL CREEK

AT COUNTY LINE, Winnebago, IL

Built 1937 Load: 22.4 t ADT: 150

BURR OAK ROAD

Over: S KINNICKINNICK CR

0.3 MI S LOVESEE RD, Winnebago, IL

Built 1965 Load: 22.4 t ADT: 300

TAFT ROAD

Over: S.E. DRAINAGEWAY

0.1 MI E KISHWAUKEE, Winnebago, IL

Built 1967 Load: 22.4 t ADT: 100

BEST RD

Over: S BR OTTER CREEK

0.5 MI N DURAND RD, Winnebago, IL

Built 1955 Load: 22.7 t ADT: 3,000

PATTERSON ROAD

Over: N BR OTTER CREEK

0.5 MI S ROCK GROVE, Winnebago, IL

Built 1968 Load: 22.7 t ADT: 225

ALPINE RD

Over: SPRING CREEK

0.1 MI S OF SPRG CK, Winnebago, IL

Built 1955 Load: 22.7 t ADT: 20,900

MARSHALL ST

Over: S.E. DRAINAGEWAY

0.05 MI S HARRISON, Winnebago, IL

Built 1966 Load: 22.7 t ADT: 575

CHESTERFIELD AVE

Over: UNNAMED DRAIN. DITCH

0.01 MI N SAMUELSON, Winnebago, IL

Built 1965 Load: 22.7 t ADT: 300

BROOKE AND 9TH ST

Over: S.E. DRAINAGEWAY

AT BROOKE AND 9TH ST, Winnebago, IL

Built 1967 Load: 23.3 t ADT: 4,800

HARLMEM RD/BAUER P

Over: ROCK RIVER

0.65MI W IL 251, Winnebago, IL

Built 1993 Load: 23.7 t ADT: 12,000

WILLS AV

Over: S.E. DRAINAGEWAY

0.03 MI E OF 11TH ST, Winnebago, IL

Built 1968 Load: 23.7 t ADT: 500

INDEPENDENCE AVE

Over: S BR KENT CREEK

0.1 MI S OF PRESTON, Winnebago, IL

Built 1978 Load: 24.0 t ADT: 525

SPRING CREEK ROAD

Over: SPRING CREEK

0.5 MI E IL 251, Winnebago, IL

Built 1930 Load: 24.3 t ADT: 16,300

COUNTY LINE ROAD

Over: N. KINNICKINNICK CRK

1.1 MI N ELEVATOR RD, Winnebago, IL

Built 1960 Load: 24.3 t ADT: 800

YALE BRIDGE RD

Over: UNNAMED CREEK

0.2 MI E WHEELER RD, Winnebago, IL

Built 1932 Load: 24.3 t ADT: 325

KLINGER RD

Over: SUMNER CREEK

0.6 MI N KELLEY RD, Winnebago, IL

Built 1948 Load: 24.3 t ADT: 125

SAUNDERS RD

Over: COOLIDGE CREEK

0.5 MI E AHRENS ROAD, Winnebago, IL

Built 1957 Load: 24.3 t ADT: 800

DURAND RD

Over: S FORK OTTER CREEK

0.6 MI E BEST ROAD, Winnebago, IL

Built 1968 Load: 24.3 t ADT: 1,100

HARRISON ROAD

Over: KENT CREEK

0.7 N AUBURN ST, Winnebago, IL

Built 1957 Load: 24.3 t ADT: 100

MERIDIAN RD

Over: DRAINAGE

5 MI NE WINNEBAGO, Winnebago, IL

Built 1956 Load: 24.3 t ADT: 3,300

EISENHOWER DRIVE

Over: SPRING CREEK

0.1 M S SPRING CR RD, Winnebago, IL

Built 1963 Load: 24.3 t ADT: 550

GRAND AVE

Over: LOVES PARK CREEK

CENTER LOVES PARK, Winnebago, IL

Built 1961 Load: 24.3 t ADT: 325

LOVES PARK DRIVE

Over: LOVES PARK CRREK

CENTER LOVES PARK, Winnebago, IL

Built 1960 Load: 24.3 t ADT: 525

PEBBLE CREEK TRAIL

Over: UNNAMED CREEK

NORTHEAST LOVES PARK, Winnebago, IL

Built 1973 Load: 24.3 t ADT: 650

HONONEGAH PRES RD

Over: DRY RUN CREEK

1 MI SE OF ROCKTON, Winnebago, IL

Built 1925 Load: 24.3 t ADT: 100

KISHWAUKEE PRES RD

Over: BR KISHWAUKEE RIVER

0.3 MI W MULFORD RD, Winnebago, IL

Built 1901 Load: 24.3 t ADT: 75

TELEGRAPH RD

Over: UNNAMED CREEK

0.25 MI SW SAUNDERS, Winnebago, IL

Built 1948 Load: 24.6 t ADT: 1,400

CEMETERY ROAD

Over: TUNNISON CREEK

3.10 MI E OF ILL 70, Winnebago, IL

Built 1954 Load: 24.6 t ADT: 575

LINDENWOOD RD

Over: UNNAMED CREEK

05 MI SE NEW MILFORD, Winnebago, IL

Built 1941 Load: 24.9 t ADT: 1,950

10TH AV

Over: KEITH CREEK

0.1 MI E KISHWAUKEE, Winnebago, IL

Built 1910 Load: 24.9 t ADT: 475

PERRYVILLE RD

Over: S. BR. WILLOW CREEK

.4 MI. N. HARLEM RD, Winnebago, IL

Built 1998 Load: 25.3 t ADT: 16,000

LOVE ROAD

Over: N KINNICKINNICK CR

0.5 MI N ELEVATOR RD, Winnebago, IL

Built 1968 Load: 25.3 t ADT: 2,450

EAST LAWN DR

Over: KEITH CREEK,SOUTH BR

0.2 MI S OF E STATE, Winnebago, IL

Built 1966 Load: 25.3 t ADT: 1,650

FAVOR ROAD

Over: GLEASON CREEK

1 MI W OWEN CENTER, Winnebago, IL

Built 1966 Load: 25.6 t ADT: 150

HARRISON AVE

Over: MADIGAN CREEK

.2 MI E PERRYVIL RD, Winnebago, IL

Built 1963 Load: 25.9 t ADT: 16,200

VANDIVER RD

Over: MADIGAN CREEK

.2 MI E PERRYVIL RD, Winnebago, IL

Built 1950 Load: 25.9 t ADT: 225

BEST RD

Over: N BR OTTER CREEK

AT YALE BRIDGE ROAD, Winnebago, IL

Built 1955 Load: 25.9 t ADT: 800

MURPHY ROAD - TR 2

Over: UNNAMED STREAM

1.5 M SE OF SEWARD, Winnebago, IL

Built 1953 Load: 25.9 t ADT: 50

FOREST HILLS ROAD

Over: PEBBLE CREEK

0.1 M N RIVERSIDE, Winnebago, IL

Built 1972 Load: 25.9 t ADT: 11,200

WESLEYAN AND 22ND

Over: S.E. DRAINAGEWAY

WESLEYAN AND 22ND ST, Winnebago, IL

Built 1967 Load: 26.2 t ADT: 3,500

IMPERIAL OAKS DR

Over: SPRING CREEK

0.2 MI N SPRINGBROOK, Winnebago, IL

Built 1967 Load: 26.6 t ADT: 775

HARRISON ROAD

Over: SUGAR RIVER

0.6 MI NORTH RT 75, Winnebago, IL

Built 1922 Load: 26.9 t ADT: 350

11TH ST. (IL251)

Over: S.E. DRAINAGE

.35 MI. S HARRISON, Winnebago, IL

Built 1964 Load: 26.9 t ADT: 16,100

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 5, 2026