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 76A

Good

Over: TRIB. TO LITL MUD CR

4M W .5M S CISSNA PK, Iroquois, IL

Built 1993 Load: 32.4 t ADT: 50

TR 86

Good

Over: TRIB TO PIGEON CRK

5 S, 3.5 W CISSNA PK, Iroquois, IL

Built 1998 Load: 32.4 t ADT: 50

TR 351

Good

Over: TRIB TO PIGEON CREEK

1 S, 3.4 W CISSNA PK, Iroquois, IL

Built 2002 Load: 32.4 t ADT: 25

TR 351

Good

Over: PIGEON CREEK

1.5M S .5 M W Cissin, Iroquois, IL

Built 2012 Load: 32.4 t ADT: 25

FAS 328 CH 11

Good

Over: TRIB MUD CREEK

.5MI S WELLINGTON E1, Iroquois, IL

Built 1994 Load: 32.4 t ADT: 100

TR 336A

Good

Over: DRAINAGE DITCH

1.5 MI NE WELLINGTON, Iroquois, IL

Built 1977 Load: 32.4 t ADT: 25

TR 2E

Good

Over: UNNAMED STREAM

STATE LINEIMIS GREER, Iroquois, IL

Built 1983 Load: 32.4 t ADT: 50

TR 353B

Good

Over: STREAM

1.5 E&.5 M N WELLING, Iroquois, IL

Built 2009 Load: 32.4 t ADT: 25

TR 10A

Good

Over: STREAM

2.0 MI W RIDGEVILLE, Iroquois, IL

Built 1982 Load: 32.4 t ADT: 25

TR 32

Good

Over: TRIB TO SPRING CREEK

3.75E,0.5N THAWVILLE, Iroquois, IL

Built 1983 Load: 32.4 t ADT: 50

TR-199

Good

Over: Creek

1.5N, .5W RIDGELAND, Iroquois, IL

Built 1990 Load: 32.4 t ADT: 25

TR 199

Good

Over: PRAIRIE CREEK

.25 M E FORD-IROQ, Iroquois, IL

Built 1993 Load: 32.4 t ADT: 25

TR 231

Good

Over: UNNAMMED TRIB

SEC 29 T26N R10E 3RD, Iroquois, IL

Built 1996 Load: 32.4 t ADT: 50

TR 227

Good

Over: STREAM

.2 MI E. FORD-IROQ L, Iroquois, IL

Built 2006 Load: 32.4 t ADT: 75

TR 26A

Good

Over: TRIB TO SPRING CR

1.5 MI W DELREY, Iroquois, IL

Built 1998 Load: 32.4 t ADT: 75

TR 338

Good

Over: COON CR

5.4M S US24 ON TR338, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 25

TR 382

Good

Over: TRIB TO COON CREEK

0.6 MI SW OF DARROW, Iroquois, IL

Built 1982 Load: 32.4 t ADT: 25

TR 358

Good

Over: UNNAMED STREAM

SHEUAMI COUNTRY CLUB, Iroquois, IL

Built 1983 Load: 32.4 t ADT: 175

TR 338

Good

Over: POSSUM TROT DITCH

2500E, 1350N, Iroquois, IL

Built 2008 Load: 32.4 t ADT: 25

TR 452

Good

Over: UNNAMED TRIBUTARY

SEE BELOW, Iroquois, IL

Built 2004 Load: 32.4 t ADT: 25

FAS 334 CH 9

Good

Over: MUD CREEK

3MI E,.5 N STOCKLAND, Iroquois, IL

Built 2008 Load: 32.4 t ADT: 200

TR 434

Good

Over: COON CREEK

5 MI N STOCKLAND, Iroquois, IL

Built 1979 Load: 32.4 t ADT: 50

TR 2D

Good

Over: SUGAR CREEK

STATE LN 1.5N MLFORD, Iroquois, IL

Built 1983 Load: 32.4 t ADT: 50

TR 2E

Good

Over: MUD CREEK

3.5E, 0.5S STOCKLAND, Iroquois, IL

Built 1990 Load: 32.4 t ADT: 25

TR 2E

Good

Over: KULT DITCH

STOCKLAND TWP SEC30,, Iroquois, IL

Built 1991 Load: 32.4 t ADT: 25

TR-2E

Good

Over: Kult Ditch

STOCKLAND TWP., Iroquois, IL

Built 1991 Load: 32.4 t ADT: 25

TR 450

Good

Over: COON CREEK

SEC 1 T25N R10W 2ND, Iroquois, IL

Built 1996 Load: 32.4 t ADT: 25

TR 434

Good

Over: TRIB TO SUGAR CREEK

1.2 MI E OF CH41, Iroquois, IL

Built 1999 Load: 32.4 t ADT: 50

TR 251

Good

Over: COON CR

2.7M S 5M E WOODLAND, Iroquois, IL

Built 2008 Load: 32.4 t ADT: 75

TR 434

Good

Over: MUD CREEK

2M E 1M N STOCKLAND, Iroquois, IL

Built 2008 Load: 32.4 t ADT: 50

CITY ST.#6100

Good

Over: MCCUTCHEON DITCH

CRESCENT CITY, Iroquois, IL

Built 1983 Load: 32.4 t ADT: 125

FAS 323,CH 40

Good

Over: COON CR

2.19 MI W OF IL 1, Iroquois, IL

Built 1991 Load: 33.4 t ADT: 650

TR 331A

Good

Over: DITCH

3.7 MI E OF ILL 1, Iroquois, IL

Built 2021 Load: 33.7 t ADT: 75

TR 22C

Good

Over: TRIB SPRING CR

1MI S ILL 54, Iroquois, IL

Built 1976 Load: 34.3 t ADT: 50

US 52

Good

Over: MARTINTON DITCH NO 3

2.55 MI E OF IL 1, Iroquois, IL

Built 2015 Load: 35.0 t ADT: 1,700

TR 188

Good

Over: PRAIRIE CR

2 MI E L'ERABLE, Iroquois, IL

Built 1975 Load: 35.0 t ADT: 50

CH 4 OVER PIKE CR

Good

Over: PIKE CREEK

3.25 MI W SBI 1, Iroquois, IL

Built 2022 Load: 35.0 t ADT: 425

FAS 326 BRYCE RD

Good

Over: JEFFERSON CREEK

1.04 MI S OF FAS 323, Iroquois, IL

Built 1988 Load: 35.3 t ADT: 475

US 24

Good

Over: DRAINAGE DITCH

.05 MILE E OF ILL 49, Iroquois, IL

Built 1994 Load: 35.3 t ADT: 4,500

FAS 329 CH-10

Good

Over: TRIB. PIGEON CR

1.39 MI E OF ILL 49, Iroquois, IL

Built 1985 Load: 35.3 t ADT: 500

IL 49 FAP 840

Good

Over: Drainage Ditch

0.48 Mi N of US 24, Iroquois, IL

Built 2015 Load: 36.0 t ADT: 2,300

TR 371A

Good

Over: TRIB TO GAY CREEK

0.5 MI W RTE 1, Iroquois, IL

Built 1983 Load: 36.0 t ADT: 50

US 45-52/FAP 840

Good

Over: Drainage Ditch

0.30 mi S of K3 Co, Iroquois, IL

Built 2013 Load: 36.3 t ADT: 3,650

TR 353

Good

Over: PIGEON CREEK

SEC 7 T24N R13W 2ND, Iroquois, IL

Built 1996 Load: 36.3 t ADT: 25

FAS327-CH41

Good

Over: POSSUM TROT DITCH

3.8MI S,US24, Iroquois, IL

Built 1994 Load: 36.3 t ADT: 325

CH 4

Good

Over: BRANCH OF LANGAN CRK

6 MI E. OF FORD CO., Iroquois, IL

Built 1992 Load: 36.9 t ADT: 150

TR 159B (WAS OR 7)

Good

Over: DRAINAGE DITCH

0.81 MI NWOF US 24, Iroquois, IL

Built 1986 Load: 36.9 t ADT: 275

TR 44

Good

Over: PRAIRE CREEK

2.25MI NW GILMAN, Iroquois, IL

Built 1954 Load: 37.3 t ADT: 75

FAS 329/CH 10

Good

Over: WHISKY CREEK

2.95 MI E.OF IL 49, Iroquois, IL

Built 1999 Load: 37.3 t ADT: 500

TR 286

Good

Over: LITTLE BEAVER CREEK

1.75 mi S of St.Anne, Iroquois, IL

Built 2020 Load: 37.3 t ADT: 275

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.