Iroquois County, IL

565 public highway bridges

Iroquois County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Iroquois County, Illinois contains 565 public highway bridges. Roughly 46% are rated “Good,” 35.8% “Fair,” and 13.3% “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.

565
Total Bridges
46%
Good
35.8%
Fair
13.3%
Poor Condition

Condition Distribution

Good
46% (260)
Fair
35.8% (202)
Poor
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.

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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.