Johnson County, IL

120 public highway bridges

Johnson County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Johnson County, Illinois contains 120 public highway bridges. Roughly 55.8% are rated “Good,” 23.3% “Fair,” and 2.5% “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.

120
Total Bridges
55.8%
Good
23.3%
Fair
2.5%
Poor Condition

Condition Distribution

Good
55.8% (67)
Fair
23.3% (28)
Poor
2.5% (3)

All Bridges (120)

US 45

Good

Over: LITTLE CASHE CREEK

0.2 MI S OF IL 146, Johnson, IL

Built 2021 Load: 36.9 t ADT: 2,000

ILL 147

Good

Over: CEDAR CREEK

IN SIMPSON, Johnson, IL

Built 1937 Load: 37.3 t ADT: 550

CREAL SPRINGS ROAD

Good

Over: WAGON CREEK

3MI N OF TUNNEL HILL, Johnson, IL

Built 2015 Load: 39.5 t ADT: 150

ILLINOIS 146

Good

Over: DUTCHMAN CREEK

2.3 MI. W. VIENNA, Johnson, IL

Built 1973 Load: 40.5 t ADT: 3,100

ILL 146

Good

Over: MCCORKLE CREEK

0.3 MI E. OF I-24, Johnson, IL

Built 1971 Load: 40.8 t ADT: 2,700

FAS 929

Good

Over: MCCORKLE CREEK

.25 MI S IL 146, Johnson, IL

Built 2004 Load: 43.4 t ADT: 750

ILL 146

Good

Over: BUCK RUN CREEK

1.2 MI E UNION CO, Johnson, IL

Built 2008 Load: 45.7 t ADT: 2,250

US 45

Good

Over: DUTCHMAN CREEK

1.6 MI S VIENNA, Johnson, IL

Built 2005 Load: 46.3 t ADT: 2,000

OR 163

Good

Over: STREAM

1 MI S STONEFORT, Johnson, IL

Built 2014 Load: 48.3 t

TR 77

Good

Over: LITTLE CACHE CREEK

NW1/4 SEC 3 T12S,R3E, Johnson, IL

Built 1985 Load: 48.6 t ADT: 50

IL 146

Good

Over: BAY CREEK

EAST OF GRANTSBURG, Johnson, IL

Built 2015 Load: 50.2 t ADT: 1,300

US 45

Good

Over: DUTCHMAN CREEK

2.5 MI S VIENNA, Johnson, IL

Built 2005 Load: 51.2 t ADT: 2,000

US 45-FAP 881

Good

Over: LITTLE CACHE CREEK

N OF BLOOMFIELD, Johnson, IL

Built 2001 Load: 54.8 t ADT: 2,150

I 24 WB

Good

Over: LITTLE CACHE CREEK

0.6 MI N ILL 146, Johnson, IL

Built 1971 Load: 56.7 t ADT: 10,650

I 24 EB

Good

Over: LITTLE CACHE CREEK

0.6 MI N. OF ILL 146, Johnson, IL

Built 1971 Load: 63.2 t ADT: 10,650

ILLINOIS 146

Good

Over: LITTLE CACHE CREEK

0.2 MI WEST VIENNA, Johnson, IL

Built 1973 Load: 75.8 t ADT: 5,050

I 24

Good

Over: MCCORKLE CREEK

0.15 MI S ILL 146, Johnson, IL

Built 1971 Load: 97.2 t ADT: 21,200

SBI 146

Poor

Over: DUTCHMAN CREEK

1.5 MI E OF ILL 37, Johnson, IL

Built 1930 Load: 13.6 t ADT: 200

FR 870

Poor

Over: WAGON CREEK

.5 MILES WEST OF CR#18, Johnson, IL

Built 1967 Load: 13.9 t ADT: 29

TR 111

Poor

Over: DUTCHMAN CR. TRIB.

SW1/4 SEC13 T12S,R2E, Johnson, IL

Built 1978 Load: 38.2 t ADT: 225

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.