Winnebago County, IL

475 public highway bridges

Winnebago County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Winnebago County, Illinois contains 475 public highway bridges. Roughly 27.8% are rated “Good,” 49.7% “Fair,” and 6.1% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

475

Total Bridges

27.8%

Good

49.7%

Fair

6.1%

Poor Condition

Condition Distribution

Good

27.8% (132)

Fair

49.7% (236)

Poor

6.1% (29)

All Bridges (475)

Sort:

ROCKTON RD

Over: RACCOON CREEK

2 MI W OF ROCKTON, Winnebago, IL

Built 1989 Load: 35.6 t ADT: 2,250

FRITZ RD

Over: UNNAMED CREEK

1 MI E RT 70, Winnebago, IL

Built 1962 Load: 35.6 t ADT: 550

ILL 251 NB

Over: N KINNIKINNICK CR

0.1 M S HONONEGAH RD, Winnebago, IL

Built 1967 Load: 36.0 t ADT: 27,200

ILL 251 SB

Over: N KINNIKINNICK CR

0.1 M S HONONEGAH RD, Winnebago, IL

Built 1967 Load: 36.0 t ADT: 27,200

IL 70

Over: DRAINAGE DITCH

.1 MI N SUMMERDALE, Winnebago, IL

Built 1962 Load: 36.0 t ADT: 5,000

ILL 251 NB

Over: S KINNIKINNICK CR

0.8 M S HONONEGAH RD, Winnebago, IL

Built 1967 Load: 36.3 t ADT: 27,200

ILL 251 SB

Over: S KINNIKINNICK CR

0.8 M S HONONEGAH RD, Winnebago, IL

Built 1967 Load: 36.3 t ADT: 27,200

I-39 & US 51 SB

Over: KISHWAUKEE RIVER

0.75 MI S BLKHAWK RD, Winnebago, IL

Built 1980 Load: 36.3 t ADT: 14,500

I-39 & US 51 NB

Over: KISHWAUKEE RIVER

0.75 MI S BLKHAWK RD, Winnebago, IL

Built 1981 Load: 36.3 t ADT: 14,500

PERRYVILLE RD

Over: UNION PACIFIC RAILRO

.2 MI N I-39, Winnebago, IL

Built 2016 Load: 36.3 t ADT: 7,450

FARM SCHOOL ROAD

Over: BRANCH OF PINK CREEK

0.2 MI W BEST ROAD, Winnebago, IL

Built 1963 Load: 36.3 t ADT: 50

REED AVE

Over: S.E. DRAINAGEWAY

0.1 MI W OF 11TH ST, Winnebago, IL

Built 1967 Load: 36.3 t ADT: 425

MORGAN ST

Over: ROCK RIVER

0.3 mile E OF IL 2, Winnebago, IL

Built 2013 Load: 36.6 t ADT: 7,600

CENTRAL AVE

Over: N FORK KENT CREEK

0.1 MI N AUBURN ST, Winnebago, IL

Built 1966 Load: 36.9 t ADT: 7,800

BURR OAK ROAD

Over: UNNAMED CREEK

0.5 MI W CROCKETT RD, Winnebago, IL

Built 1971 Load: 36.9 t ADT: 1,400

PERRYVILLE RD

Over: LOVES PARK CREEK

.4 MI N RIVERSIDE BL, Winnebago, IL

Built 1994 Load: 36.9 t ADT: 16,700

US 20 EB

Over: KISHWAUKEE RIVER

.12 MI E OLD MILL RD, Winnebago, IL

Built 1963 Load: 37.3 t ADT: 14,900

US 20 WB

Over: KISHWAUKEE RIVER

.12 MI E OLD MILL RD, Winnebago, IL

Built 1963 Load: 37.3 t ADT: 14,900

ROCKTON RD

Over: ROCKTN DAM MILL RACE

W. EDGE OF ROCKTON, Winnebago, IL

Built 1990 Load: 37.6 t ADT: 2,200

SWANSON RD

Over: UNNAMED STREAM

1.2 MI. E. IL 251, Winnebago, IL

Built 1977 Load: 37.6 t ADT: 3,450

ROCKTON AVE

Over: NW DRAINAGEWAY

0.3 MI S OF HALSTED, Winnebago, IL

Built 1962 Load: 37.9 t ADT: 8,850

HUNTER AVE

Over: KEITH CREEK

.01 MI N OF CHARLES, Winnebago, IL

Built 1987 Load: 37.9 t ADT: 2,150

FRITZ RD

Over: S FORK OTTER CREEK

0.7 MI E RT 70, Winnebago, IL

Built 1962 Load: 38.2 t ADT: 550

ILL 70

Over: KENT CREEK

0.1 M W SPRINGFLD RD, Winnebago, IL

Built 2003 Load: 38.6 t ADT: 4,600

STATE ST

Over: KISHWAUKEE RIVER

IN CHERRY VALLEY, Winnebago, IL

Built 1926 Load: 38.9 t ADT: 4,350

IL 251 (FAP 734)

Over: UP RR

KISHWAUKEE ST-RKFORD, Winnebago, IL

Built 1991 Load: 38.9 t ADT: 15,800

IL 70

Over: PECATONICA RIVER

5 MI S. OF DURAND, Winnebago, IL

Built 1996 Load: 38.9 t ADT: 3,500

ILL 70

Over: TRIB PECATONICA RIV

.4 MI E OF JUDD RD, Winnebago, IL

Built 1982 Load: 38.9 t ADT: 3,000

MONTAGUE RD

Over: ROCK CREEK

0.2 M W MERIDIAN RD, Winnebago, IL

Built 1981 Load: 38.9 t ADT: 3,300

WHITMAN ST

Over: ROCK RIVER

0.03 MI W OF N MAIN, Winnebago, IL

Built 1960 Load: 38.9 t ADT: 19,400

PECATONICA RD

Over: PECATONICA RIVER

N EDGE OF PECATONICA, Winnebago, IL

Built 1985 Load: 39.2 t ADT: 2,700

US 20 W B

Over: IL RR

.5 MI W OF ILL 251, Winnebago, IL

Built 1960 Load: 39.5 t ADT: 32,000

HARRISON ROAD

Over: TUNNISON CREEK

1.9 MI N TRASK BR RD, Winnebago, IL

Built 1992 Load: 39.5 t ADT: 225

MULFORD ROAD

Over: KEITH CREEK

0.5 MI N GUILFORD RD, Winnebago, IL

Built 1961 Load: 39.5 t ADT: 8,700

ALPINE ROAD

Over: WILLOW CREEK

0.8 MI. S IL 173, Winnebago, IL

Built 1989 Load: 39.5 t ADT: 16,100

MOATE ROAD

Over: DRAINAGE DITCH

0.3 MI. N. FRITZ RD., Winnebago, IL

Built 1999 Load: 39.5 t ADT: 25

HARRISON AVE

Over: ROCK RIVER

0.2 MI E OF ILL RT 2, Winnebago, IL

Built 1975 Load: 39.5 t ADT: 10,200

CHESTNUT ST

Over: ROCK RIVER

0.1 MI E OF MAIN ST, Winnebago, IL

Built 1962 Load: 39.5 t ADT: 8,200

ILL 2

Over: DRAINAGE DITCH

1 MI N OF LATHAM RD, Winnebago, IL

Built 1989 Load: 39.9 t ADT: 9,950

ELEVATOR RD

Over: NO KINNIKINNICK CR

0.15 MI. E. ILL 251, Winnebago, IL

Built 1969 Load: 39.9 t ADT: 9,800

I-90 N B

Over: STONEBRIDGE TRAIL

1 MI E OF ROSCOE, Winnebago, IL

Built 1958 Load: 39.9 t ADT: 28,550

ILL 75

Over: PECATONICA RIVER

1.2 MI W MERIDIAN RD, Winnebago, IL

Built 1990 Load: 40.2 t ADT: 2,650

CROWLEY RD

Over: N BR OTTER CREEK

0.5 MI N FRITZ ROAD, Winnebago, IL

Built 1966 Load: 40.2 t ADT: 200

MERIDIAN RD

Over: BR N FK KENT CR

0.2 M N SAFFORD RD, Winnebago, IL

Built 1979 Load: 40.2 t ADT: 3,400

RIVERSIDE BLVD

Over: ROCK RIVER& RR

WEST LOVES PARK, Winnebago, IL

Built 1953 Load: 40.2 t ADT: 17,700

NEWBURG RD

Over: MANNING CREEK

0.2 W OF COUNTY LINE, Winnebago, IL

Built 1974 Load: 41.5 t ADT: 8,000

BELTLINE RD

Over: S CHANNEL ROCK RIV

0.23 MI SOUTH ILL 2, Winnebago, IL

Built 1986 Load: 41.8 t ADT: 10,900

IL 251

Over: KISHWAUKEE RIVER

AT NEW MILLFORD, Winnebago, IL

Built 1996 Load: 41.8 t ADT: 3,300

PELLEY ROAD

Over: FULLER CREEK

0.5 MI W OF RT 2, Winnebago, IL

Built 1962 Load: 41.8 t ADT: 550

ATWOOD ROAD

Over: S.KINNIKINNICK CR

0.2 MI S BURR OAK RD, Winnebago, IL

Built 1973 Load: 41.8 t ADT: 1,500

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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Compiled by PlainBridges, Independent data publisher

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.