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:

TR 263

Over: TRIB TO SPOON RIVER

NE-24-T10NR3E, Knox, IL

Built 1983 Load: 32.4 t ADT: 50

TR 329

Over: HAW CREEK

NE-13-T9NR2E, Knox, IL

Built 1985 Load: 32.4 t ADT: 25

TR 278

Over: STREAM

NW-5-T13NR4E, Knox, IL

Built 1984 Load: 32.4 t ADT: 100

CH 28

Over: SPOON RIV

NW-15-T11NR4E, Knox, IL

Built 1987 Load: 32.4 t ADT: 75

CH 15

Over: WALNUT CREEK

NW-31-T13NR4E, Knox, IL

Built 1988 Load: 32.4 t ADT: 275

FAS 398 - CH 20

Over: HAW CREEK

E.CTR-2-T9NR2E, Knox, IL

Built 1988 Load: 32.4 t ADT: 100

FAS 394-CH 12

Over: WALNUT CREEK

NE-21-T13NR3E, Knox, IL

Built 1990 Load: 32.4 t ADT: 200

FAS 1394-CH 7

Over: NORTH CREEK

SE-36-T12NR2E, Knox, IL

Built 1990 Load: 32.4 t ADT: 250

FAS 403-CH 35

Over: TRIB TO HENDERSON CR

NW-35-T13NR1E, Knox, IL

Built 1994 Load: 32.4 t ADT: 200

TR 130

Over: PIG CREEK

SW-34-T10NR2E, Knox, IL

Built 1988 Load: 32.4 t ADT: 50

CH 15

Over: COURT CREEK

SW-24-T11NR3E, Knox, IL

Built 1992 Load: 32.4 t ADT: 575

TR 619A

Over: COURT CREEK

NW-24-T11NR3E, Knox, IL

Built 1992 Load: 32.4 t ADT: 10

TR 161

Over: NORTH CREEK

SW-6-T11NR3E, Knox, IL

Built 1991 Load: 32.4 t ADT: 100

TR 253

Over: FRENCH CREEK

NE-14-T10NR4E, Knox, IL

Built 1992 Load: 32.4 t ADT: 125

FAS 396-CH 18

Over: FRENCH CREEK

NW-27-T10NR4E, Knox, IL

Built 1990 Load: 32.4 t ADT: 275

CO. LINE RD.

Over: CEDAR CREEK

NW-19-T11NR1E, Knox, IL

Built 1995 Load: 32.4 t ADT: 75

E. THIRD ST

Over: BN RR (062986X)

E. OF BROAD ST, Knox, IL

Built 1998 Load: 32.4 t ADT: 2,650

N. SOANGETAHA RD

Over: AT&SF RR (004647L)

SE-12-T11NR1E, Knox, IL

Built 2013 Load: 32.4 t ADT: 600

FAS-393(CH-4)

Over: Trib to Walnut Creek

W.CTR-17-T13N,R4E, Knox, IL

Built 1983 Load: 33.0 t ADT: 600

ILL 17

Over: FITCH CREEK

2 MI W OF LAFAYETTE, Knox, IL

Built 1989 Load: 36.3 t ADT: 425

FAP 574 (IL 41)

Over: BNSF RR

S OF GALESBURG, Knox, IL

Built 2004 Load: 36.6 t ADT: 4,800

ILL 41

Over: CEDAR CREEK TRIB

0.4 MI S JCT IL 116, Knox, IL

Built 2002 Load: 36.9 t ADT: 2,050

TR 7

Over: POPE CREEK

NE-6-T13NR1E, Knox, IL

Built 1983 Load: 38.2 t ADT: 125

TR 215

Over: SPOON RIVER

CTR-24-T11NR3E, Knox, IL

Built 1986 Load: 38.6 t ADT: 250

ILL 180

Over: SPOON RIVER

1 MI N WILLIAMSFIELD, Knox, IL

Built 1990 Load: 38.9 t ADT: 625

EB US 34

Over: CEDAR CREEK

SW EDGE OF GALESBURG, Knox, IL

Built 1979 Load: 39.5 t ADT: 8,950

ILL 180

Over: WALNUT CREEK

2.5M S OF ILL 17, Knox, IL

Built 1993 Load: 40.2 t ADT: 625

TR 206

Over: FOREMAN CREEK

S.CTR-5-T12NR3E, Knox, IL

Built 1900 Load: 40.2 t ADT: 10

FAI 74 WB

Over: Pope Creek

1 mi s Henry Co line, Knox, IL

Built 2018 Load: 40.5 t ADT: 8,150

EB I-74

Over: BNSF RR (004648T)

N.GALESBURG INTERCH, Knox, IL

Built 1963 Load: 43.1 t ADT: 8,850

WB I-74

Over: BNSF RR (004648T)

N GALESBURG INTERCH, Knox, IL

Built 1963 Load: 44.1 t ADT: 8,850

TR 260

Over: LITTLERS CREEK

W CTR-31-T9NR4E, Knox, IL

Built 1966 Load: 44.4 t ADT: 75

IL 180

Over: CADWELL CR

2 MI N WILLIAMSFIELD, Knox, IL

Built 2000 Load: 48.0 t ADT: 400

US 150

Over: HENDERSON CREEK

6.3 MI N OF US 34, Knox, IL

Built 2012 Load: 48.0 t ADT: 2,950

FAS 1195 IL 180

Over: BR BRANDYWINE CR

4.5 MI N OF US 150, Knox, IL

Built 2009 Load: 48.0 t ADT: 400

IL 97

Over: LITTLERS CREEK

2 MI N OF RAPATEE, Knox, IL

Built 2002 Load: 48.6 t ADT: 1,350

US 150

Over: SPOON RIVER TRIB.

3.8 MI W JCT 180/150, Knox, IL

Built 2003 Load: 48.9 t ADT: 1,100

ILL 41

Over: CEDAR CREEK

0.75 MI E OF US 34, Knox, IL

Built 1986 Load: 49.6 t ADT: 4,300

ILL 8

Over: STREAM

4.5 MI E OF ILL 97, Knox, IL

Built 1971 Load: 51.5 t ADT: 900

WB US 34

Over: CEDAR CREEK

SW EDGE OF GALESBURG, Knox, IL

Built 1979 Load: 52.2 t ADT: 8,950

IL 180

Over: CADWELL CR

1.5 MI N WILLIAMSFLD, Knox, IL

Built 2000 Load: 52.2 t ADT: 400

FAI 74EB

Over: HENDERSON CREEK

5.4 MI S HENRY CO LI, Knox, IL

Built 2015 Load: 54.8 t ADT: 8,150

TR 320

Over: TRIB TO FITCH CR

SW-24-T13NR4E, Knox, IL

Built 1986 Load: 54.8 t ADT: 10

FAI 74WB

Over: HENDERSON CREEK

5.4 MI S HENRY CO LI, Knox, IL

Built 2015 Load: 55.1 t ADT: 8,150

COUNTY HIGHWAY 37

Over: TRIB.S.HENDERSON.CRK

SE-16-T12NR1E, Knox, IL

Built 1960 Load: 57.3 t ADT: 500

FAI 74 EB

Over: Pope Creek

0.9mi S Henry Co Ln, Knox, IL

Built 2018 Load: 63.5 t ADT: 8,150

US 150 (MAIN ST)

Over: CEDAR CREEK, BNSF RR

500 BLK W. MAIN, Knox, IL

Built 2012 Load: 64.2 t ADT: 10,300

BROAD STREET

Over: CEDAR CREEK CHANNEL

N.OF WATER ST., Knox, IL

Built 1930 Load: 67.1 t ADT: 1,550

I-74

Over: STREAM

.1M N KNOX CO LINE, Knox, IL

Built 1967 Load: 88.8 t ADT: 15,000

US 34

Over: CEDAR CREEK

0.7M E OF COUNTY LN, Knox, IL

Built 1986 Load: 88.8 t ADT: 8,950

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