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:

ILL 251 S B

Over: ROCKTON ROAD

2.6 MI S ILL 75, Winnebago, IL

Built 1967 ADT: 12,400

ILL 251 N B

Over: ROCKTON ROAD

2.6 MI S ILL 75, Winnebago, IL

Built 1967 ADT: 9,150

US RT 20 WB

Over: US 20BR EB

3 MI W OF ROCKFORD, Winnebago, IL

Built 1961 ADT: 5,350

US 20 WB

Over: CUNNINGHAM RD.

1 MI E MERIDIAN RD, Winnebago, IL

Built 1964 ADT: 1,850

US 20 EB

Over: CUNNINGHAM RD.

1 MI E MERIDIAN RD, Winnebago, IL

Built 1964 ADT: 1,850

US 20 WB

Over: PRAIRIE RD

1 MI W OF ILL 2, Winnebago, IL

Built 1964 ADT: 1,550

US 20 EB

Over: PRAIRIE RD

1 MI W OF ILL 2, Winnebago, IL

Built 1964 ADT: 1,550

US 20 E B

Over: SIMPSON RD

0.8 MI W OF ILL 2, Winnebago, IL

Built 1964 ADT: 700

US 20 W B

Over: SIMPSON RD

0.8 MI W OF ILL 2, Winnebago, IL

Built 1964 ADT: 700

US 20 E B

Over: KISHWAUKEE ST.

.8 MI W OF ILL 251, Winnebago, IL

Built 1960 ADT: 7,000

US 20 W B

Over: KISHWAUKEE ST.

.8 MI W OF ILL 251, Winnebago, IL

Built 1960 ADT: 7,000

US 20 E B

Over: ILL 251 (11TH ST)

S EDGE ROCKFORD, Winnebago, IL

Built 1960 ADT: 16,900

US 20 W B

Over: ILL 251 (11TH ST)

S EDGE ROCKFORD, Winnebago, IL

Built 1960 ADT: 16,500

I-39 NB

Over: HARRISON AVE

.6 MI S OF I-90, Winnebago, IL

Built 1963 ADT: 18,900

I-39 SB

Over: HARRISON AVE

.6 MI S OF I-90, Winnebago, IL

Built 1963 ADT: 17,700

MONTAGUE RD

Over: US RT 20

1.5 MI E MERIDIAN RD, Winnebago, IL

Built 1964 ADT: 20,400

MERIDIAN RD

Over: US RT 20

1 MI S OF RT 20BR, Winnebago, IL

Built 1964 ADT: 14,600

WELDON RD

Over: US RT 20

.2 MI S RT 20 BR, Winnebago, IL

Built 1961 ADT: 11,400

FOREST HILLS RD SB

Over: IL 251 NB

IN ROCKFORD, Winnebago, IL

Built 1971 ADT: 16,300

HONONEGAH ROAD

Over: ILL 2

IN ROCKTON, Winnebago, IL

Built 1966 ADT: 8,550

IL 2 S B

Over: SOO RR &OLD RIVER RD

0.3 M S HONONEGAH RD, Winnebago, IL

Built 1966 ADT: 3,000

ILL 2 N B

Over: SOO RR &OLD RIVER RD

0.3 M S HONONEGAH RD, Winnebago, IL

Built 1966 ADT: 3,000

MULFORD RD

Over: I-39 & US 20

.5 MI E OF US 51, Winnebago, IL

Built 1976 ADT: 50,900

I-39 OFF RAMP

Over: US 20 BYPASS

SW EDGE OF ROCKFORD, Winnebago, IL

Built 1981 ADT: 26,500

I-39 SB

Over: FAP 301(US20 BYPASS)

0.4 MI W OF MULFORD, Winnebago, IL

Built 1981 ADT: 26,500

I-39 RAMP

Over: LINDEN ROAD

.25 MI S OF US20, Winnebago, IL

Built 1981 ADT: 5,950

I-39 RAMP

Over: LINDEN RD

0.25 MI S OF US 20, Winnebago, IL

Built 1981 ADT: 5,950

I-39 NB

Over: LINDEN ROAD

0.25 MI S OF US 20, Winnebago, IL

Built 1981 ADT: 5,950

I-39 RAMP 389

Over: I-39 & US 51 SB

0.35 MI S OF US 20, Winnebago, IL

Built 1981 ADT: 25,200

I-39 & US 51 SB

Over: BLACKHAWK RD

1.75 MI S OF US 20, Winnebago, IL

Built 1981 ADT: 2,800

I-39 & US 51 NB

Over: BLACKHAWK ROAD

1.75 MI S OF US 20, Winnebago, IL

Built 1981 ADT: 2,800

TR 251-ROTARY RD

Over: I-39 & US 51

1.5 MI N OF OGLE CO, Winnebago, IL

Built 1980 ADT: 29,000

FAS1045-BAXTER RD

Over: I-39 & US 51

1.0 MI N OF OGLE CO, Winnebago, IL

Built 1980 ADT: 29,000

ALPINE ROAD

Over: US 20 BY-PASS

SOUTH EDGE ROCKFORD, Winnebago, IL

Built 1984 ADT: 30,400

PRAIRIE HILL RD

Over: I-90

2 MI S WISCONSIN LN, Winnebago, IL

Built 2000 ADT: 51,000

US 51 & IL 75

Over: I-90

E. EDGE SOUTH BELOIT, Winnebago, IL

Built 2000 ADT: 51,000

US 20 E B

Over: ILL 2

1 MI S OF ROCKFORD, Winnebago, IL

Built 2019 ADT: 15,500

US 20 W B

Over: ILL 2

1 MI S OF ROCKFORD, Winnebago, IL

Built 2019 ADT: 15,500

20TH ST

Over: US 20

0.7 MI E OF ILL 251, Winnebago, IL

Built 2021 ADT: 36,000

ILL 251

Over: SPRING CREEK RD

1.4 MI N WHITMAN ST, Winnebago, IL

Built 2012 ADT: 27,600

PERRYVILLE ROAD

Over: I-39

.75 S HARRISON AVE, Winnebago, IL

Built 2023 ADT: 50,900

LINDEN RD

Over: I 39 SB RAMP

OVER 39 SB RAMP, Winnebago, IL

Built 2023 ADT: 5,950

ALPINE RD

Over: FOREST HILLS RD

0.2 MI S WINDSOR RD, Winnebago, IL

Built 1972 ADT: 11,200

JEFFERSON ST

Over: ROCK RIV& MADISON ST

0.1 MI E OF N MAIN, Winnebago, IL

Built 1925 ADT: 2,700

WHITMAN ST

Over: MADISON ST & RR

0.25 MI E OF MAIN ST, Winnebago, IL

Built 1961 ADT: 3,100

N 2ND ST

Over: WHITMAN ST

WHITMAN INTERCHANGE, Winnebago, IL

Built 1963 ADT: 7,900

N 3RD ST EXT TO 2N

Over: SB RAMP TO N 6TH ST

WHITMAN INTERCHANGE, Winnebago, IL

Built 1963 ADT: 6,000

I-90 S B

Over: BURR OAK RD

1 MI E OF ROSCOE, Winnebago, IL

Built 1958 ADT: 1,850

I-90 N B

Over: BURR OAK RD

1 MI E OF ROSCOE, Winnebago, IL

Built 1958 ADT: 1,850

I-90 RAMP

Over: I-90

.25 MI N OF 20 BR, Winnebago, IL

Built 1958 ADT: 70,600

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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