Iroquois County, IL

565 public highway bridges

Iroquois County Bridge Snapshot

Iroquois County, Illinois contains 565 public highway bridges in the FHWA National Bridge Inventory. Roughly 46% are rated “Good,” 35.8% “Fair,” 13.3% “Poor,” and 13.3% 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.

565
Total Bridges
46%
Good
13.3%
Poor
13.3%
Structurally Deficient

Condition Distribution

Good
46% (260)
Fair
35.8% (202)
Poor
13.3% (75)
SD
13.3% (75)

All Bridges (565)

US 45 FAS 338

Good

Over: SPRING CREEK (S)

14.88 MI S OF IL 54, Iroquois, IL

Built 2008 Load: 32.4 t ADT: 3,300

IL 116 FAP 681

Good

Over: LANGAN CREEK

6.5 MI W OF I-57, Iroquois, IL

Built 2009 Load: 32.4 t ADT: 850

CH 44 (FAS 1336)

Good

Over: TRIB LITTLE MUD CR

5.5MI E US45 ON CH44, Iroquois, IL

Built 2004 Load: 32.4 t ADT: 325

FAS 1336 CH 44

Good

Over: TRIB LITTLE MUD CR

4.85MI E US45 ONCH44, Iroquois, IL

Built 2007 Load: 32.4 t ADT: 325

FAS 334(CH 9)

Good

Over: LOUIS CREEK TRIB

3 1/4 MILE W BUCKLEY, Iroquois, IL

Built 2013 Load: 32.4 t ADT: 475

FAS1335 CH42

Good

Over: TRIB LITTLE MUD CR-

2.2MI N JCT 44/42, Iroquois, IL

Built 2016 Load: 32.4 t ADT: 150

TR 313

Good

Over: UNNAMED DRDITCH

4.25 MI E BUCKLEY, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 25

TR 327

Good

Over: LEWIS CREEK

.25 MI W BUCKLEY, Iroquois, IL

Built 1989 Load: 32.4 t ADT: 100

TR-50

Good

Over: Spring Creek

1.5MI E.1.5MI N BUC, Iroquois, IL

Built 1994 Load: 32.4 t ADT: 50

TR 331

Good

Over: UNNAMED TRIB

1M N 1.5M W CISSNA, Iroquois, IL

Built 1993 Load: 32.4 t ADT: 50

TR 323

Good

Over: TR OF LITTLE MUD CR

1.5MI N 1.5W CISSNA, Iroquois, IL

Built 2007 Load: 32.4 t ADT: 25

TR 269

Good

Over: LOUIS CREEK

3.5MI N BUCKLEY, Iroquois, IL

Built 2005 Load: 32.4 t ADT: 75

TR 14A

Good

Over: LOUIS CREEK

2.5 MI W&.7N BUCKLEY, Iroquois, IL

Built 2010 Load: 32.4 t ADT: 25

FAS 331 CH45

Good

Over: FOUNTAIN CREEK

0.6MI N GOODWINE, Iroquois, IL

Built 1982 Load: 32.4 t ADT: 250

TR 333

Good

Over: FOUNTAIN CREEK

.16 MI E 650N-1900E, Iroquois, IL

Built 1992 Load: 32.4 t ADT: 50

TR 114

Good

Over: LITTLE MUD CREEK

3M.N,1.5M W CISSNA P, Iroquois, IL

Built 1976 Load: 32.4 t ADT: 75

TR 162

Good

Over: MUD CR

2.25E,2N CISNA PARK, Iroquois, IL

Built 1986 Load: 32.4 t ADT: 75

TR 200

Good

Over: JEFFERSON CREEK

2E, 1SWOODWORTH, Iroquois, IL

Built 1989 Load: 32.4 t ADT: 50

TR 182

Good

Over: SHAVETAIL CREEK

1 E&1.25 N WOODWORTH, Iroquois, IL

Built 2000 Load: 32.4 t ADT: 75

CH 45

Good

Over: JEFFERSON CREEK

.5 M S OF SCHWER, Iroquois, IL

Built 2009 Load: 32.4 t ADT: 250

TR-114

Good

Over: Trib. Mud Creek

3.0MI N 1.5W CISSNA, Iroquois, IL

Built 2017 Load: 32.4 t ADT: 75

CH 24

Good

Over: LANGAN CREEK

.8 MI N.IL 116, Iroquois, IL

Built 1999 Load: 32.4 t ADT: 25

TR 59

Good

Over: PRAIRIE CREEK

1.25 MI W LERABLE, Iroquois, IL

Built 1976 Load: 32.4 t ADT: 50

TR 73

Good

Over: LANGAN CREEK

.2MI W OF CH 24, Iroquois, IL

Built 1976 Load: 32.4 t ADT: 50

TR 58

Good

Over: LANGAN CK

1.1 MI N. RT 116, Iroquois, IL

Built 1978 Load: 32.4 t ADT: 25

TR 10A

Good

Over: STREAM

2 MI N ILL116, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 25

TR 138

Good

Over: TRIB TO PRAIRIE CK

1200E,2410N, Iroquois, IL

Built 1985 Load: 32.4 t ADT: 25

TR-57

Good

Over: Langan Creek

600E, 2700N, Iroquois, IL

Built 1989 Load: 32.4 t ADT: 25

TR-49A

Good

Over: Br Prairie Creek

3MI,W OF RT45, Iroquois, IL

Built 1994 Load: 32.4 t ADT: 25

TR150

Good

Over: UNNAMED TRIB

SEC 8 T28N R13W 2ND, Iroquois, IL

Built 1996 Load: 32.4 t ADT: 50

TR 59

Good

Over: TRIB. TO PRAIRIE CR.

3.2 MI. SE CLIFTON, Iroquois, IL

Built 2002 Load: 32.4 t ADT: 50

TR 150

Good

Over: PRAIRIE CR

0.5 MI N. OF US 45, Iroquois, IL

Built 2008 Load: 32.4 t ADT: 50

TR 392

Good

Over: BEAVER DITCH NO 1

2 MI N DONOVAN, Iroquois, IL

Built 1976 Load: 32.4 t ADT: 100

TR 392

Good

Over: BEAVER CR #2

1.5 MI N DONOVAN, Iroquois, IL

Built 2000 Load: 32.4 t ADT: 100

TR 406

Good

Over: HOOPER CREEK

.5N,2.5E BEAVERVILLE, Iroquois, IL

Built 1989 Load: 32.4 t ADT: 50

TR 392

Good

Over: BEAVER CREEK

2.5MI NE BEAVERVLL, Iroquois, IL

Built 1996 Load: 32.4 t ADT: 25

TR 392

Good

Over: TRIB BEAVER CREEK

2.25 M. N. CH 3, Iroquois, IL

Built 2007 Load: 32.4 t ADT: 25

TR 288

Good

Over: BR SUGAR CREEK

1.75 MI NE WOODLAND, Iroquois, IL

Built 1980 Load: 32.4 t ADT: 150

TR 314

Good

Over: COON CREEK

4.5 SE WOODLAND, Iroquois, IL

Built 1993 Load: 32.4 t ADT: 10

TR 230B

Good

Over: TRIB OF SUGAR CREEK

5.5 MI SW OF WATSEKA, Iroquois, IL

Built 2000 Load: 32.4 t ADT: 25

TR-288

Good

Over: Suger Creek

1.5 MI S WATSEKA, Iroquois, IL

Built 2018 Load: 32.4 t ADT: 150

TR 197

Good

Over: UNNAMED STREAM

1 MI S OF WATSEKA, Iroquois, IL

Built 2001 Load: 32.4 t ADT: 75

TR 211

Good

Over: TRIB SUGAR CREEK

2.25M E 1.5M N WOODL, Iroquois, IL

Built 2007 Load: 32.4 t ADT: 50

FAS 321 CH 4

Good

Over: LANGAN CREEK

2.66 MI W OF US 54, Iroquois, IL

Built 2007 Load: 32.4 t ADT: 325

TR 178

Good

Over: LANGAN CR

3.32 MI S CO LINE, Iroquois, IL

Built 1972 Load: 32.4 t ADT: 100

TR-17

Good

Over: Trib Langon Creek

2.5N, .125W CLIFTON, Iroquois, IL

Built 1990 Load: 32.4 t ADT: 50

TR 150

Good

Over: LANGAN CREEK

2.35 MI S CO. LINE, Iroquois, IL

Built 1996 Load: 32.4 t ADT: 50

TR 96

Good

Over: N BRANCH LANGAN CK

2.5 MI SW CHEBANSE, Iroquois, IL

Built 2000 Load: 32.4 t ADT: 25

TR 33C

Good

Over: LANGAN CREEK

2.5 MI NW OF CLIFTON, Iroquois, IL

Built 2005 Load: 32.4 t ADT: 25

TR 120

Good

Over: Trib to Langan Creek

1 m S&3/4 M W Cheban, Iroquois, IL

Built 2012 Load: 32.4 t ADT: 200

Read our methodology — how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial