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 62

Fair

Over: STREAM

4E,2N OF LODA, Iroquois, IL

Built 1984 Load: 32.4 t ADT: 25

TR 88A

Fair

Over: TRIB. TO LITTLE MUD

3 M W CISSNA PARK, Iroquois, IL

Built 1996 Load: 32.4 t ADT: 25

TR 347A

Fair

Over: TRIB MUD CREEK

2 MI. N 2.1 MIWGREER, Iroquois, IL

Built 1976 Load: 32.4 t ADT: 75

TR 352

Fair

Over: STREAM

.1 MI S CH 10, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 25

TR-353B

Fair

Over: Creek

1N, 3.25E GREER, Iroquois, IL

Built 1990 Load: 32.4 t ADT: 25

TR 372

Fair

Over: MUD CREEK

3.5 MI NE WELLINGTON, Iroquois, IL

Built 1997 Load: 32.4 t ADT: 50

TR 2A

Fair

Over: TRIB TO SPING CR

FORD-IROQ LINE, Iroquois, IL

Built 1976 Load: 32.4 t ADT: 50

TR 10 B

Fair

Over: TRIB SPRING CR

.5 M E .25THAWVILLE, Iroquois, IL

Built 1978 Load: 32.4 t ADT: 20

TR 10A

Fair

Over: STREAM

1.25 MI NE THAWVILLE, Iroquois, IL

Built 1982 Load: 32.4 t ADT: 25

TR 360

Fair

Over: STREAM

.25 MI S CH 40, Iroquois, IL

Built 1976 Load: 32.4 t ADT: 25

TR 191

Fair

Over: DRAINAGE DITCH

3 MI W SHELDON, Iroquois, IL

Built 1987 Load: 32.4 t ADT: 150

TR 185

Fair

Over: TRIB IROQUOIS RIVER

3.25W, 5S SHELDON, Iroquois, IL

Built 1989 Load: 32.4 t ADT: 75

TR225

Fair

Over: UNNAMED STREAM

2 MI S,1.5 E.SHELDON, Iroquois, IL

Built 1991 Load: 32.4 t ADT: 50

TR 331A

Fair

Over: TRIB SUGAR CREEK

2.7MI E CH4 ON CH 20, Iroquois, IL

Built 1976 Load: 32.4 t ADT: 75

TR 380 A

Fair

Over: SUGAR CREEK

.5 M N CH 9, Iroquois, IL

Built 1988 Load: 32.4 t ADT: 50

TR 380A

Fair

Over: TRIB OF SUGAR CREEK

.5N, 1W OF STOCKLAND, Iroquois, IL

Built 1990 Load: 32.4 t ADT: 50

TR 448

Fair

Over: UNNAMED TRIB

2 MI S. CH 10, Iroquois, IL

Built 1994 Load: 32.4 t ADT: 50

MS 6200

Fair

Over: PIGEON CR

0.5 MI E. CISSNA PK, Iroquois, IL

Built 2007 Load: 32.4 t

W CONCORD PLACE

Fair

Over: N SHELDON S CONCORD

W CONCORD PLACE, Iroquois, IL

Built 1985 Load: 32.4 t ADT: 50

TR 367

Fair

Over: SPRING CR

.3M S-.5M E OF LODA, Iroquois, IL

Built 1965 Load: 32.7 t ADT: 75

TR 255A

Fair

Over: TRIB TO SPRING CREEK

3 Mi. E.OF THAWVILLE, Iroquois, IL

Built 1973 Load: 32.7 t ADT: 10

TR 2 D

Fair

Over: Sheldon Ditch #1

0.3 Mi S of US 24, Iroquois, IL

Built 1900 Load: 33.0 t ADT: 75

TR 189

Fair

Over: BR OF SPRING CREEK

2MI E JCT45&24, Iroquois, IL

Built 1928 Load: 33.4 t ADT: 325

FAS 319 CH8

Fair

Over: TRIB VERMILION RIVER

2.5MI N SBI116 ONCH8, Iroquois, IL

Built 1940 Load: 33.4 t ADT: 350

FAS 325

Fair

Over: SUGAR CREEK

.75 MI SW WATSEKA, Iroquois, IL

Built 1974 Load: 34.0 t ADT: 1,300

TR 366

Fair

Over: TRIB SUGAR CREEK

0.02 MI S CH9, Iroquois, IL

Built 1980 Load: 34.0 t ADT: 75

FAI-57 SB

Fair

Over: Sugar Creek

0.96 MI S GILMAN INT, Iroquois, IL

Built 1967 Load: 35.0 t ADT: 8,200

FAI-57 NB

Fair

Over: Sugar Creek

0.95 MI S GILMAN INT, Iroquois, IL

Built 1967 Load: 35.0 t ADT: 8,200

TR 343A

Fair

Over: STREAM

.5 MI W IND. ST LINE, Iroquois, IL

Built 1965 Load: 35.0 t ADT: 50

CH 9/FAS 334

Fair

Over: TRIB OF SUGAR CREEK

1MI NW OF STOCKLAND, Iroquois, IL

Built 1997 Load: 35.0 t ADT: 100

US 52

Fair

Over: IROQUOIS RIVER

3.31 MI N OF US 24, Iroquois, IL

Built 1988 Load: 35.3 t ADT: 1,200

ILL 49

Fair

Over: BR PIGEON CREEK

2.4 MI N OF ILL 9, Iroquois, IL

Built 1990 Load: 35.3 t ADT: 1,050

TR 438 A

Fair

Over: BEAVER CR

.5 MI N CH3, Iroquois, IL

Built 1975 Load: 35.3 t ADT: 25

TR 454

Fair

Over: TRIB TO IROQUOIS RV

2 MI E OF IROQUOIS, Iroquois, IL

Built 1970 Load: 35.3 t ADT: 75

CH 30

Fair

Over: TRIB SPRING CREEK

2 MI W ILL49, Iroquois, IL

Built 1975 Load: 35.6 t ADT: 75

FAS 335 CH 10

Fair

Over: PIGEON CREEK

0.1 MI W RTE 49, Iroquois, IL

Built 1978 Load: 35.6 t ADT: 350

TR 225

Fair

Over: TRIB TO COON CREEK

2.0 S,1 W SHELDON, Iroquois, IL

Built 1974 Load: 35.6 t ADT: 50

TR 251C

Fair

Over: SHAVETAIL CREEK

1M E OF ILL 49, Iroquois, IL

Built 1973 Load: 36.0 t ADT: 500

CH 42

Fair

Over: TRIB SPRING CREEK

2.7MI N US24, Iroquois, IL

Built 1954 Load: 36.0 t ADT: 75

TR 363

Fair

Over: PIGEON CR

.2MI E ILL 49, Iroquois, IL

Built 1965 Load: 36.0 t ADT: 100

CH 42

Fair

Over: TRIB SPRING CREEK

2.1 MI N US 24, Iroquois, IL

Built 1972 Load: 36.6 t ADT: 75

FAS 321 CH4 SA 4

Fair

Over: DRAINAGE DITCH

3.08 MI W OF I-57, Iroquois, IL

Built 1986 Load: 36.9 t ADT: 325

TR 117

Fair

Over: DRAINAGE DITCH

1.0E 2.75N WATSEKA, Iroquois, IL

Built 1983 Load: 36.9 t ADT: 175

TR 302

Fair

Over: BEAVER CREEK

1.25E 1.25N PAPINEAU, Iroquois, IL

Built 1984 Load: 37.6 t ADT: 150

TR 317

Fair

Over: STREAM

1.6E,1.6S OF MILFORD, Iroquois, IL

Built 1983 Load: 37.6 t ADT: 50

ILL 1/FAP 332A

Fair

Over: SUGAR CREEK

2.73 M S OF US 24, Iroquois, IL

Built 1992 Load: 37.9 t ADT: 2,300

US 24

Fair

Over: DRAINAGE DITCH

3.1 MILES E OF US 45, Iroquois, IL

Built 1954 Load: 38.9 t ADT: 3,200

US 24

Fair

Over: TRIB PRAIRIE CREEK

3.74 MI W OF I-57, Iroquois, IL

Built 1987 Load: 38.9 t ADT: 2,300

ILL 49

Fair

Over: TRIB OF SHAVEYAIL CR

3.35 MI S OF US 24, Iroquois, IL

Built 1990 Load: 38.9 t ADT: 1,900

TR 250

Fair

Over: N MARTINTON DITCH 2

1 MI W OF MARTINTON, Iroquois, IL

Built 1981 Load: 38.9 t ADT: 50
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.