Johnson County, IL
120 public highway bridges
Johnson County Bridge Snapshot
Johnson County, Illinois contains 120 public highway bridges in the FHWA National Bridge Inventory. Roughly 55.8% are rated “Good,” 23.3% “Fair,” 2.5% “Poor,” and 2.5% 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.
Condition Distribution
All Bridges (120)
US 45
GoodOver: LITTLE CASHE CREEK
0.2 MI S OF IL 146, Johnson, IL
ILL 147
GoodOver: CEDAR CREEK
IN SIMPSON, Johnson, IL
CREAL SPRINGS ROAD
GoodOver: WAGON CREEK
3MI N OF TUNNEL HILL, Johnson, IL
ILLINOIS 146
GoodOver: DUTCHMAN CREEK
2.3 MI. W. VIENNA, Johnson, IL
ILL 146
GoodOver: MCCORKLE CREEK
0.3 MI E. OF I-24, Johnson, IL
FAS 929
GoodOver: MCCORKLE CREEK
.25 MI S IL 146, Johnson, IL
ILL 146
GoodOver: BUCK RUN CREEK
1.2 MI E UNION CO, Johnson, IL
US 45
GoodOver: DUTCHMAN CREEK
1.6 MI S VIENNA, Johnson, IL
OR 163
GoodOver: STREAM
1 MI S STONEFORT, Johnson, IL
TR 77
GoodOver: LITTLE CACHE CREEK
NW1/4 SEC 3 T12S,R3E, Johnson, IL
IL 146
GoodOver: BAY CREEK
EAST OF GRANTSBURG, Johnson, IL
US 45
GoodOver: DUTCHMAN CREEK
2.5 MI S VIENNA, Johnson, IL
US 45-FAP 881
GoodOver: LITTLE CACHE CREEK
N OF BLOOMFIELD, Johnson, IL
I 24 WB
GoodOver: LITTLE CACHE CREEK
0.6 MI N ILL 146, Johnson, IL
I 24 EB
GoodOver: LITTLE CACHE CREEK
0.6 MI N. OF ILL 146, Johnson, IL
ILLINOIS 146
GoodOver: LITTLE CACHE CREEK
0.2 MI WEST VIENNA, Johnson, IL
I 24
GoodOver: MCCORKLE CREEK
0.15 MI S ILL 146, Johnson, IL
SBI 146
PoorOver: DUTCHMAN CREEK
1.5 MI E OF ILL 37, Johnson, IL
FR 870
PoorOver: WAGON CREEK
.5 MILES WEST OF CR#18, Johnson, IL
TR 111
Structurally DeficientOver: DUTCHMAN CR. TRIB.
SW1/4 SEC13 T12S,R2E, Johnson, IL
Read our methodology — how this data is sourced, computed, and verified.
Related
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |