Knox County, IL

321 public highway bridges

Knox County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Knox County, Illinois contains 321 public highway bridges. Roughly 45.8% are rated “Good,” 29.6% “Fair,” and 5.9% “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.

321
Total Bridges
45.8%
Good
29.6%
Fair
5.9%
Poor Condition

Condition Distribution

Good
45.8% (147)
Fair
29.6% (95)
Poor
5.9% (19)

All Bridges (321)

TR 81

Good

Over: TRIB TO FORMAN CREEK

2308N 1788E, Knox, IL

Built 2012 Load: 89.1 t ADT: 50

F-F STREET

Good

Over: COURT CREEK

0.02 S. OF E-E ST., Knox, IL

Built 1994 Load: 89.1 t ADT: 50

TR 57

Poor

Over: TRIB TO WALNUT CREEK

NW-34-T13NR4E, Knox, IL

Built 1900 ADT: 25

TR 210

Poor

Over: WALNUT CREEK

N1/2-17-T13NR3E, Knox, IL

Built 1900 Load: 17.5 t ADT: 50

CEDAR ST

Poor

Over: CEDAR FORK CREEK

200 N. CEDAR, Knox, IL

Built 1931 Load: 19.4 t ADT: 50

TR 291

Poor

Over: SWAB RUN CREEK

SW-25-T10NR4E, Knox, IL

Built 1971 Load: 21.7 t ADT: 10

TR 244

Poor

Over: WALNUT CREEK

NE-22-T13NR3E, Knox, IL

Built 1966 Load: 24.3 t ADT: 50

MCCLURE ST

Poor

Over: CEDAR CREEK

SOUTH OF W. MAIN ST., Knox, IL

Built 1956 Load: 24.9 t ADT: 1,850

TR 263

Poor

Over: TRIB TO SPOON RIVER

NW-24-T10NR3E, Knox, IL

Built 1983 Load: 25.6 t ADT: 50

TR 6A,MERCER CO LI

Poor

Over: TRIB.TO N.HENDERSON

SW-7-T13NR1E, Knox, IL

Built 1965 Load: 27.9 t ADT: 10

US 34

Poor

Over: WALNUT CREEK

1 MI SW OF ALTONA, Knox, IL

Built 1921 Load: 28.2 t ADT: 2,550

TR 249

Poor

Over: HAW CREEK

S.CTR-15-T10NR2E, Knox, IL

Built 1971 Load: 28.2 t ADT: 50

TR 228

Poor

Over: TRIB TO SPOON RIVER

N.CTR-27-T10NR3E, Knox, IL

Built 1969 Load: 29.8 t ADT: 75

TR 341

Poor

Over: KICKAPOO CREEK

SE-14-T9NR4E, Knox, IL

Built 1974 Load: 29.8 t ADT: 50

ILL 41

Poor

Over: BNSF RR (063729D)

0.5 M N.ST.AUGUSTINE, Knox, IL

Built 1983 Load: 30.5 t ADT: 2,300

US 150

Poor

Over: SPOON RIVER

4 MI W OF ILL 180, Knox, IL

Built 1930 Load: 32.4 t ADT: 1,100

FAS 396

Poor

Over: SWAB RUN CREEK

SW-35-T10NR4E, Knox, IL

Built 1996 Load: 32.4 t ADT: 325

FAS 395-CH 17

Poor

Over: SPOON RIVER

5 MI SE OF GILSON, Knox, IL

Built 2000 Load: 32.4 t ADT: 125

ILL 116

Poor

Over: CEDAR CREEK

APPR 2M W IL 41, Knox, IL

Built 1975 Load: 45.4 t ADT: 1,100

US 150

Poor

Over: POPE CR

2 M S OF ILL 17, Knox, IL

Built 1951 Load: 48.3 t ADT: 2,350

TR 52

Poor

Over: BRUSH CREEK

NW-13-T10NR1E, Knox, IL

Built 1973 Load: 53.5 t ADT: 100

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

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.