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)

HORACE AVE

Good

Over: KENT CREEK

0.7 MI S OF STATE ST, Winnebago, IL

Built 2006 Load: 42.1 t ADT: 1,350

PERRYVILLE ROAD

Good

Over: S BR KISHWAUKEE RIV.

0.3 MI N BLACKHAWK, Winnebago, IL

Built 1971 Load: 42.8 t ADT: 3,200

FAS-40 (YEALE BR R

Good

Over: SUGAR CREEK

6 MI NE DURAND, Winnebago, IL

Built 2022 Load: 42.8 t ADT: 575

PIERCE AVE

Good

Over: NW DRAINAGEWAY

0.05 MI E OF ROCKTON, Winnebago, IL

Built 1962 Load: 42.8 t ADT: 350

US 20 BR

Good

Over: KEITH CREEK

.75 MI W ALPINE RD, Winnebago, IL

Built 1993 Load: 43.1 t ADT: 20,100

BURDEN ROAD

Good

Over: BR ROCK RIVER

0.2 MI N RT 173, Winnebago, IL

Built 1966 Load: 43.1 t ADT: 2,550

MAIN STREET

Good

Over: KINNIKINNICK CREEK

IN ROSCOE, Winnebago, IL

Built 2000 Load: 43.1 t ADT: 5,600

MORSAY DR

Good

Over: KEITH CREEK,NORTH BR

0.03 MI E FAIRVIEW, Winnebago, IL

Built 1967 Load: 43.4 t ADT: 3,000

JACKSON STREET

Good

Over: UNNAMED STREAM

EAST EDGE PECATONICA, Winnebago, IL

Built 2000 Load: 43.7 t ADT: 750

STONERIDGE DR

Good

Over: SPRING CREEK

0.1 MI N SPRG CK RD, Winnebago, IL

Built 2011 Load: 44.4 t ADT: 100

MERIDIAN RD

Good

Over: ROCK CREEK

0.25 M S SIMPSON RD, Winnebago, IL

Built 1982 Load: 44.7 t ADT: 1,000

IL 251 NB

Good

Over: KILBUCK CREEK

.6 MI N. OGLE CO.LN., Winnebago, IL

Built 1989 Load: 45.0 t ADT: 4,450

COMLY ROAD

Good

Over: GROVE CREEK

2 MI S OF PECATONICA, Winnebago, IL

Built 1987 Load: 45.4 t ADT: 150

ROCKTON RD

Good

Over: DRY RUN CREEK

.5 MI E IL 251, Winnebago, IL

Built 2013 Load: 45.4 t ADT: 9,150

FOREST HILL ROAD

Good

Over: WILLOW CREEK

1.6 M S ILL 173, Winnebago, IL

Built 1981 Load: 45.7 t ADT: 11,300

PERRYVILLE ROAD

Good

Over: N KISHWAUKEE RVR

0.4 MI N BLACKHAWK, Winnebago, IL

Built 1971 Load: 46.3 t ADT: 3,200

PRAIRIE HILL RD

Good

Over: DRY CREEK RUN

AT WILLOWBROOK RD, Winnebago, IL

Built 2007 Load: 46.7 t ADT: 4,050

TRAINER ROAD

Good

Over: SPRING CREEK

.25 MI N. OF SPRING BROOK, Winnebago, IL

Built 1991 Load: 47.0 t ADT: 1,100

PORTER ROAD

Good

Over: BR KENT CREEK

.33 M E MERIDIAN RD, Winnebago, IL

Built 1979 Load: 47.0 t ADT: 525

CH 52(WILLOW BROOK

Good

Over: BRANCH OF DRY CREEK

0.5 MI S ROCKTON RD, Winnebago, IL

Built 2004 Load: 47.6 t ADT: 5,650

MATERIAL AVE.

Good

Over: LOVES PARK CREEK

0.3 MI. S. WINDSOR, Winnebago, IL

Built 1992 Load: 49.6 t ADT: 2,300

S. CENTRAL AVENUE

Good

Over: S. BR. OF KENT CREEK

0.06 MI S OF PRESTON, Winnebago, IL

Built 1975 Load: 50.9 t ADT: 3,400

US 20 W B

Good

Over: E CHANNEL ROCK RIV

.7 MI E OF ILL 2, Winnebago, IL

Built 2015 Load: 51.8 t ADT: 32,000

PERRYVILLE RD

Good

Over: UNNAMED CREEK

0.03MI N OF IL 173, Winnebago, IL

Built 2004 Load: 51.8 t ADT: 7,800

MS-8810 Inter. Blv

Good

Over: Spring Creek

.5MI N RIVERSIDE BLV, Winnebago, IL

Built 2016 Load: 52.2 t ADT: 1,700

LYFORD RD

Good

Over: KEITH CREEK

E. EDGE OF ROCKFORD, Winnebago, IL

Built 2017 Load: 53.5 t ADT: 2,750

PARK ACCESS RD

Good

Over: ROCK CUT SPILLWAY

ROCK CUT ST PARK, Winnebago, IL

Built 2019 Load: 53.5 t ADT: 775

US 20 W B

Good

Over: W CHANNEL ROCK RIV

.5 MI E OF ILL 2, Winnebago, IL

Built 2015 Load: 53.8 t ADT: 32,000

BORG WARNER ENTRAN

Good

Over: DRAINAGE WAY

.21 MI W 20TH ST, Winnebago, IL

Built 2016 Load: 53.8 t ADT: 2,050

SPRING CREEK ROAD

Good

Over: SPRING CREEK

EAST OF ALPINE RAOD, Winnebago, IL

Built 2001 Load: 55.4 t ADT: 21,000

OLDE CREEK RD

Good

Over: KEITH CREEK

0.2 MI E PERRYVILLE, Winnebago, IL

Built 2003 Load: 55.7 t ADT: 6,200

MULFORD ROAD

Good

Over: S BR KEITH CR

0.3 MI N RT 20, Winnebago, IL

Built 1971 Load: 56.4 t ADT: 21,600

ATWOOD ROAD

Good

Over: MCDONALD CREEK

AT MCMICHAEL ROAD, Winnebago, IL

Built 1976 Load: 56.4 t ADT: 2,050

LOGISTICS PKWY

Good

Over: CREEK

.04MI N BLACKHAWK RD, Winnebago, IL

Built 2006 Load: 57.0 t ADT: 375

CAMPBELL ROAD

Good

Over: HUNGRY RUN CREEK

0.5 M E OF MOATE RD, Winnebago, IL

Built 1984 Load: 60.9 t ADT: 50

LUANNA DRIVE

Good

Over: PRIVATE LAKE

LAKE LEANNA SUB., Winnebago, IL

Built 1978 Load: 62.9 t ADT: 200

IL 75

Good

Over: CREEK

.06MI SW ROCKTON AVE, Winnebago, IL

Built 2010 Load: 66.1 t ADT: 2,250

TR-100 (Weldon Rd)

Good

Over: S BR OF KENT CRK

2 MI E OF WINNEBAGO, Winnebago, IL

Built 2018 Load: 67.1 t ADT: 800

NORTH ALPINE

Good

Over: BRANCH OF KEITH CRK

.5 MI N OF STATE ST, Winnebago, IL

Built 2018 Load: 69.7 t ADT: 19,000

BAKER RD

Good

Over: UNNAMED CREEK

0.3 MI E CROWLEY RD, Winnebago, IL

Built 1977 Load: 84.6 t ADT: 150

PERRYVILLE RD

Good

Over: UNNAMED CREEK

.6 MI. S. IL 173, Winnebago, IL

Built 1998 Load: 88.8 t ADT: 15,300

IL 75

Good

Over: DRAINAGE DITCH

0.36 E OF IL 70, Winnebago, IL

Built 2011 Load: 89.1 t ADT: 2,600

I-90

Good

Over: S KINNIKINNICK CREEK

1 MI E OF ROSCOE, Winnebago, IL

Built 1958 Load: 89.1 t ADT: 28,550

I-90

Good

Over: STREAM

1 MI S OF ILL 173, Winnebago, IL

Built 1958 Load: 89.1 t ADT: 30,700

I-90

Good

Over: N KINNIKINNICK CREEK

1 MI E OF ROSCOE, Winnebago, IL

Built 1958 Load: 93.3 t ADT: 28,550

I-90

Good

Over: STREAM

.6 MI S RIVERSIDE BL, Winnebago, IL

Built 1958 Load: 96.2 t ADT: 33,150

ELM STREET-ROCKFOR

Poor

Over: KENT CREEK

0.5 MI W OF DOWNTOWN, Winnebago, IL

Built 1992 Load: 10.4 t ADT: 35

KILBUCK BLUFF FP

Poor

Over: BR KILBUCK CR

BY KILBUCK CREEK, Winnebago, IL

Built 1926 Load: 14.3 t ADT: 475

GUILFORD ROAD

Poor

Over: KEITH CR

0.7 MI E OF ALPINE R, Winnebago, IL

Built 1952 Load: 19.4 t ADT: 10,150

LIBERTY DR

Poor

Over: NW DRAINAGEWAY

0.35 MI W OF KILBURN, Winnebago, IL

Built 1962 Load: 19.4 t ADT: 1,400

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