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)

TR 355

Good

Over: TRIB TO SPRING CRK

0000E,300N, Iroquois, IL

Built 2004 Load: 32.4 t ADT: 50

TR 22B

Good

Over: SPRING CREEK

3 MI N/1 MI E LODA, Iroquois, IL

Built 1998 Load: 32.4 t ADT: 25

TR 87(Ford Co)

Good

Over: Spring Creek

1 mi. E. of Loda, Iroquois, IL

Built 2015 Load: 32.4 t ADT: 150

TR361A

Good

Over: BRH OF FOUNTAIN CRK

3.75W 0.5S WELLINGTN, Iroquois, IL

Built 1985 Load: 32.4 t ADT: 75

TR 228

Good

Over: TRIB FOUNTAIN CREEK

T24N,R12W,2ND PM, Iroquois, IL

Built 1991 Load: 32.4 t ADT: 25

TR 228

Good

Over: UNNAMED TRIB

1.25 MI S. CH 10, Iroquois, IL

Built 1994 Load: 32.4 t ADT: 50

TR 246

Good

Over: STREAM

3.5W,.5N WELLINGTON, Iroquois, IL

Built 2000 Load: 32.4 t ADT: 50

TR 308

Good

Over: TRIB TO MUD CR

1.5 MI N. WELLINGTON, Iroquois, IL

Built 2004 Load: 32.4 t ADT: 75

TR 246

Good

Over: TRIB FOUNTAIN CREEK

3.5 M W 1/2 M S WELL, Iroquois, IL

Built 2010 Load: 32.4 t ADT: 50

CH 2

Good

Over: IROQUOIS

SEC4,T27N,R13W,2NDPM, Iroquois, IL

Built 1991 Load: 32.4 t ADT: 300

TR 320

Good

Over: MARTINTON DITCH NO 3

5.5 MI SE MARTINTON, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 25

TR 302

Good

Over: TRIB TO PIKE CREEK

2E 2.75S MARTINTON, Iroquois, IL

Built 1985 Load: 32.4 t ADT: 50

TR 188A

Good

Over: TRIB IROQUOIS RIVER

1.5 MI SE L'ERABLE, Iroquois, IL

Built 1987 Load: 32.4 t ADT: 50

TR 302

Good

Over: MARTINTON DITCH

2M SE MARTINTON, Iroquois, IL

Built 1986 Load: 32.4 t ADT: 50

TR 302

Good

Over: MARTINTON DITCH

1.5 M E 1 S MARTINTO, Iroquois, IL

Built 1993 Load: 32.4 t ADT: 50

TR 202

Good

Over: TRIB TO IROQUOIS RIV

2 E & .5 S L'ERABLE, Iroquois, IL

Built 1998 Load: 32.4 t ADT: 75

TR 224

Good

Over: PIKE CREEK

2.75 W MARTINTON, Iroquois, IL

Built 2011 Load: 32.4 t ADT: 100

TR 302

Good

Over: MARTINTON DITCH #2

1.3M E 1.5M N MARTIN, Iroquois, IL

Built 2009 Load: 32.4 t ADT: 50

TR 55B

Good

Over: MARTINTON DITCH NO3

1.25 MI E MARTINTON, Iroquois, IL

Built 2013 Load: 32.4 t ADT: 125

TR 290

Good

Over: TRIB IROQOIS RIVER

4.4 MI S US 52, Iroquois, IL

Built 2003 Load: 32.4 t ADT: 900

TR-290

Good

Over: Iroquois River

2.5 mi.N. of Watseka, Iroquois, IL

Built 2018 Load: 32.4 t ADT: 1,100

TR 325

Good

Over: GAY CREEK

0.75 MI W CH 20, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 50

TR 275A

Good

Over: SUGAR CREEK

1.5N,1.5W OF MILFORD, Iroquois, IL

Built 1983 Load: 32.4 t ADT: 75

TR 256

Good

Over: GAY CREEK

3.5S 2.0W OF MILFORD, Iroquois, IL

Built 1984 Load: 32.4 t ADT: 10

TR 284

Good

Over: TRIB TO MUD CREEK

.5 W, 1.5 S MILFORD, Iroquois, IL

Built 1997 Load: 32.4 t ADT: 100

TR 284 (OLD RT 1)

Good

Over: BR OF LITTLE MUD CR

2.75 MI SW OF ILL 1, Iroquois, IL

Built 2006 Load: 32.4 t ADT: 50

TR 228

Good

Over: FOUNTAIN CREEK

3.75M W 3.25M S MILF, Iroquois, IL

Built 2012 Load: 32.4 t ADT: 25

FAS 1322 (CH 37)

Good

Over: W BR. OF HORSE CRK

1.7 MI W CH8 ON CH37, Iroquois, IL

Built 2010 Load: 32.4 t ADT: 475

TR-11

Good

Over: Creek

4.75 W, 3 N CLIFTON, Iroquois, IL

Built 1989 Load: 32.4 t ADT: 50

TR-30

Good

Over: Stream

5.75MI N.CH4, Iroquois, IL

Built 1994 Load: 32.4 t ADT: 50

TR 22

Good

Over: W BRANCH LANGAN CK

05 MI N OF CH 4, Iroquois, IL

Built 2000 Load: 32.4 t ADT: 25

TR 10A

Good

Over: STREAM

1.5 MI S CH 4, Iroquois, IL

Built 1999 Load: 32.4 t ADT: 25

TR15

Good

Over: TRIB TO LANGAN CREEK

7.25 MI W OF CLIFTON, Iroquois, IL

Built 2005 Load: 32.4 t ADT: 25

TR 41

Good

Over: DRAINAGE DITCH

8M W& .5 M S Clifton, Iroquois, IL

Built 2012 Load: 32.4 t ADT: 25

TR 2

Good

Over: STREAM

FORD-IROQ CO LINE, Iroquois, IL

Built 2020 Load: 32.4 t ADT: 25

TR 40

Good

Over: STREAM

3MI S 1 W ONARGA, Iroquois, IL

Built 1977 Load: 32.4 t ADT: 50

TR142

Good

Over: SHAVETAIL CR

6 MI E 1 NONARGA, Iroquois, IL

Built 1979 Load: 32.4 t ADT: 75

TR 90

Good

Over: TRIB TO SPRING CREEK

3MI E 1 MIS ONARGA, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 25

FAS 322/CH 3

Good

Over: TRIB BEAVER RIVER

.50 MI W PAPINEAU, Iroquois, IL

Built 2001 Load: 32.4 t ADT: 425

TR 250

Good

Over: BEAVER CR

2.25 MI NWPAPINEAU, Iroquois, IL

Built 1979 Load: 32.4 t ADT: 50

TR-234

Good

Over: Beaver Creek

2 M W & .25 N OF RT1, Iroquois, IL

Built 1995 Load: 32.4 t ADT: 75

TR 212

Good

Over: Trib to Iroquois Riv

3/4 M S 4 M W Papine, Iroquois, IL

Built 2012 Load: 32.4 t ADT: 50

FAS 335 CH 10

Good

Over: DRAINAGE DITCH

4.2 MI W RTE 49, Iroquois, IL

Built 1978 Load: 32.4 t ADT: 375

FAS 335 CH 10

Good

Over: DRAINAGE DITCH

4MI.SW CISSNA PARK, Iroquois, IL

Built 1979 Load: 32.4 t ADT: 350

CH 46 (OR 76A)

Good

Over: UNNAMED TRIBUTARY

4.5 MI W 4.25 MI S, Iroquois, IL

Built 2008 Load: 32.4 t ADT: 100

CH 46 (OR 76A)

Good

Over: UNNAMED TRIBUTARY

4.5 MI W 4.75M S CP, Iroquois, IL

Built 2008 Load: 32.4 t ADT: 100

TR 363

Good

Over: TRIB TO PIGEON CR

2 MI W ILLRT 49, Iroquois, IL

Built 1979 Load: 32.4 t ADT: 50

TR 363

Good

Over: TRIB TO PIGEON CREEK

4.0W 3.55 CISNA PARK, Iroquois, IL

Built 1985 Load: 32.4 t ADT: 50

TR 371

Good

Over: PIGEON CR

.5M E ILL 49, Iroquois, IL

Built 1988 Load: 32.4 t ADT: 75

TR 337

Good

Over: TRIB TO L MUD CREEK

3 MI W CISNA PARK, Iroquois, IL

Built 1984 Load: 32.4 t ADT: 50

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.