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:

ELEVATOR RD

Over: I-90

1 MI E OF ROSCOE, Winnebago, IL

Built 1958 ADT: 57,100

SPRING CREEK RD

Over: I-90

2 MI N RT 20 BR, Winnebago, IL

Built 1958 ADT: 66,300

BELVIDERE RD

Over: I-90

2.5 MI N ILL 173, Winnebago, IL

Built 1958 ADT: 57,100

HARLEM RD

Over: I-90

2 MI S OF ILL 173, Winnebago, IL

Built 1958 ADT: 61,400

ROCKTON RD

Over: I-90

2.5 MI S OF ILL 75, Winnebago, IL

Built 1958 ADT: 57,100

SWANSON RD

Over: I-90

1.5 MI N ILL 173, Winnebago, IL

Built 1958 ADT: 57,100

ROTE RD

Over: I-90

2 MI E ROCKFORD, Winnebago, IL

Built 1958 ADT: 66,300

UNION PACIFIC RR

Over: ILL 2

S EDGE RKFD CBD, Winnebago, IL

Built 1900 ADT: 8,650

DM&E RR

Over: GLEASMAN RD

1.5 MI SW ROSCOE, Winnebago, IL

Built 1900 ADT: 1,400

ICE RR

Over: PRAIRIE HILL RD

0.4 MI SE S. BLUFF, Winnebago, IL

Built 1966 ADT: 4,200

CMST P&P RR

Over: GOEKE RD

.5 MI N OF ILL 75, Winnebago, IL

Built 1900 ADT: 35

ICE RR

Over: ATWOOD FOR PRES RD

1.5 MI E OF ILL 2, Winnebago, IL

Built 1900 ADT: 100

UNION PACIFIC RR

Over: TAY ST & KENT CREEK

SW ROCKFORD, Winnebago, IL

Built 1900 ADT: 750

UP RR

Over: 9TH STREET

SE ROCKFORD, Winnebago, IL

Built 1890 ADT: 2,100

UNION PACIFIC RR

Over: BROADWAY

SE ROCKFORD, Winnebago, IL

Built 1900 ADT: 8,700

UP RR

Over: 20TH STREET

SE ROCKFORD, Winnebago, IL

Built 1900 ADT: 6,950

RIVERSIDE RD

Over: I-90

2 MI E LOVES PARK, Winnebago, IL

Built 2009 ADT: 66,300

Pedestrian Walkway

Over: I-90

07320219621 004, Winnebago, IL

ROCK CUT ST. PK. R

Over: I-90 (NW TOLLWAY)

1.5 MI. S. OF IL 173, Winnebago, IL

Built 1989 ADT: 61,400

I-90 NB

Over: ILL RTE 173

3 MI S OF ROSCOE, Winnebago, IL

Built 2007 ADT: 10,300

I-90 SB

Over: ILL RTE 173

3 MI S OF ROSCOE, Winnebago, IL

Built 2007 ADT: 10,300

MCCURRY RD

Over: I-90 (N & W)

1 MI E OF ROSCOE, Winnebago, IL

Built 2006 ADT: 57,100

NEWBURG RD

Over: I-90

.10 W OF I-39, Winnebago, IL

Built 2008 ADT: 70,600

RAMP I-39NB TO I90

Over: I-90

.42MI E NEWBURG RD, Winnebago, IL

Built 2009 ADT: 4,850

I-90 N B

Over: US 20 BR

2 MI E ROCKFORD, Winnebago, IL

Built 2009 ADT: 26,100

I-90 S B

Over: US 20 BR

1.2M W OF NEWBURG RD, Winnebago, IL

Built 2009 ADT: 26,100

I 90 WB TO I 39 SB

Over: I-90

.5 MI N US 20, Winnebago, IL

Built 2009 ADT: 50,600

MILL RD

Over: I 90

.5 MI N OF CHERRY VA, Winnebago, IL

Built 2013 ADT: 50,600

TR-187 (KELLEY RD)

Over: SUMNER CREEK

0.5 MI E KLINGER RD, Winnebago, IL

Built 1948 Load: 8.7 t ADT: 125

TR-75 (OLIVER ROAD

Over: TUNNISON CREEK

0.5 MI N KNAPP ROAD, Winnebago, IL

Built 1961 Load: 10.7 t ADT: 50

WILLOWBROOK RD

Over: N KINNIKINNICK CR

0.2 M N ELEVATOR RD, Winnebago, IL

Built 1985 Load: 12.3 t ADT: 2,900

TR-83 (KNAPP ROAD)

Over: TUNNISON CREEK

0.5 MI W HARRISON RD, Winnebago, IL

Built 1961 Load: 12.3 t ADT: 75

TELEGRAPH RD

Over: UNNAMED CREEK

0.7 MI W EDDIE ROAD, Winnebago, IL

Built 1950 Load: 13.0 t ADT: 1,200

CAMPBELL ROAD

Over: N. BR. PINK CR.

0.7 M E OF CO. LINE, Winnebago, IL

Built 1951 Load: 13.6 t ADT: 50

20TH ST

Over: KEITH CREEK

0.02 MI S CHARLES, Winnebago, IL

Built 1928 Load: 15.6 t ADT: 7,750

MONTAGUE RD

Over: W BR MILL CR

1.27 MI E OF PEC. RD, Winnebago, IL

Built 1960 Load: 16.5 t ADT: 1,200

YALE BRIDGE RD

Over: RACCOON CREEK

AT CLOVER ROAD, Winnebago, IL

Built 1951 Load: 16.5 t ADT: 800

CUNNINGHAM RD

Over: GROVE CREEK

0.25 MI W CONGER RD, Winnebago, IL

Built 1960 Load: 17.5 t ADT: 250

MANCHESTER ROAD

Over: DRY RUN CREEK

1 MI E WILLOWBROOK, Winnebago, IL

Built 1960 Load: 17.5 t ADT: 675

MIDDLE ROAD

Over: DRY RUN CREEK

0.7 M E MANCHESTR RD, Winnebago, IL

Built 1965 Load: 18.1 t ADT: 250

JUDD ROAD

Over: UNNAMED CREEK

0.1 MI S CAMPBELL RD, Winnebago, IL

Built 1956 Load: 18.8 t ADT: 10

ROCK GROVE RD

Over: N. BR. OTTER CREEK

.25 MI E BEST ROAD, Winnebago, IL

Built 1988 Load: 19.1 t ADT: 425

AUBURN RD

Over: UNNAMED CREEK

2 MI NE OF WINNEBAGO, Winnebago, IL

Built 1936 Load: 19.1 t ADT: 1,250

PECATONICA RD

Over: GROVE CREEK

0.5 MI S US 20, Winnebago, IL

Built 1927 Load: 19.4 t ADT: 1,300

SAFFORD ROAD

Over: KENT CREEK

0.5 MI E SPRINGFIELD, Winnebago, IL

Built 1957 Load: 19.4 t ADT: 675

ROCKTON AVE

Over: BR MUD CREEK

1 MI S LATHAM RD, Winnebago, IL

Built 1956 Load: 19.8 t ADT: 675

CHARLES ST

Over: KEITH CREEK

1.5 MI W ALPINE RD, Winnebago, IL

Built 1940 Load: 20.1 t ADT: 14,700

HAMBORG ROAD

Over: S KINNIKINNICK CR

0.1 M S BURR OAK RD, Winnebago, IL

Built 1984 Load: 20.1 t ADT: 1,100

SPRINGFIELD AVE

Over: DRAINAGE DITCH

.4 MI. N. AUBURN ST., Winnebago, IL

Built 1960 Load: 20.4 t ADT: 7,600

EDDIE ROAD

Over: BR PECATONICA RIVER

AT FISH HATCHERY RD, Winnebago, IL

Built 1936 Load: 20.4 t ADT: 75

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