Knox County, IL

321 public highway bridges

Knox County Bridge Snapshot

Knox County, Illinois contains 321 public highway bridges in the FHWA National Bridge Inventory. Roughly 45.8% are rated “Good,” 29.6% “Fair,” 5.9% “Poor,” and 5.9% 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.

321

Total Bridges

45.8%

Good

5.9%

Poor

5.9%

Structurally Deficient

Condition Distribution

Good

45.8% (147)

Fair

29.6% (95)

Poor

5.9% (19)

SD

5.9% (19)

All Bridges (321)

Sort:

EB I-74

Over: IL 17 & BNSF-EXEMPT

0.5 MI W OF WOODHULL, Knox, IL

Built 1967 ADT: 3,550

WB I-74

Over: IL 17 & BNSF-EXEMPT

0.5 MI W OF WOODHULL, Knox, IL

Built 1967 ADT: 3,200

TR 399-100N

Over: I-74

1 MI SW OF WOODHULL, Knox, IL

Built 1965 ADT: 15,000

EB I-74

Over: MAIN (FAU 6800)

GALESBURG INERCH, Knox, IL

Built 1963 ADT: 4,900

WB I-74

Over: E. MAIN ST

GALESBURG INTERCH, Knox, IL

Built 1963 ADT: 4,900

WB I-74

Over: TR 205

1 MI W JCT US 150, Knox, IL

Built 1963 ADT: 200

EB I-74

Over: TR 205

1 MI W OF US 150, Knox, IL

Built 1963 ADT: 200

WB US 34

Over: I-74

NE OF GALESBURG, Knox, IL

Built 1965 ADT: 16,300

EB US 34

Over: I-74

NE OF GALESBURG, Knox, IL

Built 1965 ADT: 16,300

US 34 WB

Over: US 150

N CL OF GALESBURG, Knox, IL

Built 1965 ADT: 9,500

US 34 EB

Over: US 150

N CL OF GALESBURG, Knox, IL

Built 1965 ADT: 6,300

US 150

Over: INTERSTATE 74

1 MI E OF KNOXVILLE, Knox, IL

Built 1963 ADT: 15,400

APPLETON ROAD

Over: I-74

6 MI E OF KNOXVILLE, Knox, IL

Built 1967 ADT: 15,400

FAS 396-CH 18

Over: I-74

3 MI E OF SPOON R, Knox, IL

Built 1968 ADT: 15,400

ONTARIO ROAD

Over: I-74

.5 MI N HENDERSON CR, Knox, IL

Built 1966 ADT: 16,300

RIO ROAD

Over: I-74

5 MI S WOODHULL, Knox, IL

Built 1966 ADT: 16,300

CH 21

Over: I-74

3 MI E OF KNOXVILLE, Knox, IL

Built 1967 ADT: 15,400

BRICKYARD RD (650

Over: I-74

1 MI NW KNOXVILLE, Knox, IL

Built 1963 ADT: 19,000

MARKET ST (825 E)

Over: I-74

IN KNOXVILLE, Knox, IL

Built 1962 ADT: 16,800

TR 235

Over: I-74

8 MI E OF KNOXVILLE, Knox, IL

Built 1968 ADT: 15,400

WB I-74

Over: SPOON R & TR 238A

9 MI E OF KNOXVILLE, Knox, IL

Built 1968 ADT: 25

EB I-74

Over: SPOON RIVER & TR238A

9 MI E OF KNOXVILLE, Knox, IL

Built 1968 ADT: 25

TR 253

Over: I-74

6 MI E SPOON RIVER, Knox, IL

Built 1967 ADT: 15,400

KNOX ST

Over: I-74

S OF GALESBURG INTER, Knox, IL

Built 1964 ADT: 19,000

CH 7

Over: I-74

1 MI N GALESBURG INT, Knox, IL

Built 1963 ADT: 17,700

TR 121 (2000N)

Over: I-74

1.5 MI N US-34 INTER, Knox, IL

Built 1965 ADT: 16,300

HENDERSON RD (CH 3

Over: I-74

2.5 MI W OF WATAGA, Knox, IL

Built 1965 ADT: 16,300

TR 89

Over: I-74

2.5 MI S HENDERSON C, Knox, IL

Built 1965 ADT: 16,300

TR 21

Over: I-74

4 MI SW OF WOODHULL, Knox, IL

Built 1965 ADT: 16,300

TR 74 FARNHAM ST

Over: US 34 BYPASS

W OF I-74&34 INTERCH, Knox, IL

Built 1965 ADT: 14,500

BNSF(065601P)

Over: US 34 BYPASS

1.5 MI E OF US 150, Knox, IL

Built 1965 ADT: 14,500

SEMINARY ST

Over: US 34 BYPASS

1 MI E OF US 150, Knox, IL

Built 1972 ADT: 12,900

LINCOLN PARK DR

Over: US 34 BYPASS

0.6 MI E OF US 150, Knox, IL

Built 1965 ADT: 12,900

FREMONT ST FAU 679

Over: US 34 BYPASS

1.13 M N OF IL41/164, Knox, IL

Built 1971 ADT: 9,100

US 34 WB

Over: W. MAIN ST

0.3 MI W IL 41, Knox, IL

Built 1976 ADT: 7,500

US 34 EB

Over: W MAIN ST

0.3 MI W IL 41, Knox, IL

Built 1976 ADT: 4,450

W Knox Rd

Over: US 34

SW GALESBURG AIRPORT, Knox, IL

Built 1979 ADT: 8,950

FAS 1400-CH 9

Over: EB and WB I 74

Knoxville Interchang, Knox, IL

Built 2016 ADT: 16,800

WB I 74

Over: BNSF(079799R)

0.73MI S of US 34, Knox, IL

Built 2017 ADT: 1,200

EB I 74

Over: BNSF

0.73MI S of US 34, Knox, IL

Built 2018 ADT: 1,200

FAU 6838-CH 10

Over: BNSF RR & GRAVEL RD

NW-27-T11NR1E, Knox, IL

Built 1985 ADT: 225

AT&SF RR (004676W)

Over: MCCLURE ST

ON MCCLURE S OF MAIN, Knox, IL

Built 1966 ADT: 1,850

BN RR (062996D)

Over: NORTH ST

ON NORTH W.- LINCOLN, Knox, IL

Built 1888 ADT: 1,000

ADMIRAL WALKWAY

Over: LINWOOD RD-ILL. 41

0.84 S. OF MAIN ST, Knox, IL

Built 1986 ADT: 4,300

BN RR (072662X)

Over: ILL 8

CTR-10-T9NR4E, Knox, IL

Built 1927 ADT: 900

BN(097988K)

Over: ILL 78

SE-12-T9NR4E, Knox, IL

Built 1919 ADT: 1,400

BN(079211T)

Over: ILL 41

SE-20-T11NR1E, Knox, IL

Built 1903 ADT: 4,900

BN (063724U) 177.6

Over: ILL 116

0.1 M WEST OF IL 41, Knox, IL

Built 1934 ADT: 1,100

BN RR (062985R)

Over: SEMINARY ST

NW-14-T11NR1E, Knox, IL

Built 1900 ADT: 6,000

BN RR (093680D)

Over: LOSEY ST

CTR-11-T11NR1E, Knox, IL

Built 1934 ADT: 5,700

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