LaSalle County, IL

529 public highway bridges

LaSalle County Bridge Snapshot

LaSalle County, Illinois contains 529 public highway bridges in the FHWA National Bridge Inventory. Roughly 37.1% are rated “Good,” 39.7% “Fair,” 11.5% “Poor,” and 11.5% 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.

529
Total Bridges
37.1%
Good
11.5%
Poor
11.5%
Structurally Deficient

Condition Distribution

Good
37.1% (196)
Fair
39.7% (210)
Poor
11.5% (61)
SD
11.5% (61)

All Bridges (529)

IL 23/US 52

Good

Over: CROOKED LEG CREEK

0.27M E of IL23/US52, LaSalle, IL

Built 2010 Load: 53.5 t ADT: 2,300

OLD US 34 SBI 18

Good

Over: INDIAN CREEK

IN EARLVILLE, LaSalle, IL

Built 1996 Load: 53.8 t ADT: 1,400

ILL 251

Good

Over: BAILEY CREEK

4.4 MI S OF ILL 71, LaSalle, IL

Built 1999 Load: 54.4 t ADT: 1,700

FAS 263 CH 5

Good

Over: VERMILION RIVER

N 18TH,E 1350, LaSalle, IL

Built 2021 Load: 55.1 t ADT: 800

FAI 39 RMP#15.90

Good

Over: CONVEYOR BELT/PVT RD

600 FT S OF US 6, LaSalle, IL

Built 1985 Load: 56.7 t ADT: 950

CH 33

Good

Over: PECUMSAUGEM CREEK

N 33RD,E 910, LaSalle, IL

Built 2021 Load: 57.7 t ADT: 525

CO RD 16

Good

Over: CEDAR CREEK

N 2451,E 175, LaSalle, IL

Built 1973 Load: 57.7 t ADT: 2,150

IL 71/FAP 627

Good

Over: SALT WELLS CR

4.3 MI E OF IL 178, LaSalle, IL

Built 2006 Load: 58.6 t ADT: 1,700

IL 71 (FAP 311)

Good

Over: Trib to Fox River

1.4 mi SW of US 52, LaSalle, IL

Built 2014 Load: 58.6 t ADT: 4,600

I-39 US 51

Good

Over: STREAM

1.52 MI S OF CH 54, LaSalle, IL

Built 1989 Load: 67.7 t ADT: 19,400

US 52

Good

Over: Little Vermillion River

3.10 M. E. of IL 251, LaSalle, IL

Built 2019 Load: 69.3 t ADT: 1,350

ILL 18

Good

Over: EAGLE CR

1.70 MI.W.OF ILL 23, LaSalle, IL

Built 1972 Load: 89.1 t ADT: 3,550

ILL 23 FAP 68

Good

Over: GOOSE CR

0.7 MI N OF US 6, LaSalle, IL

Built 1977 Load: 89.1 t ADT: 18,300

US 6

Good

Over: CLARK RUN CREEK

0.71 MI E OF ILL 178, LaSalle, IL

Built 1984 Load: 89.1 t ADT: 5,700

IL 71 FAP 311

Good

Over: MISSION CREEK

0.5 MI S OF US 52, LaSalle, IL

Built 2010 Load: 91.4 t ADT: 4,600

IL 71 FAP 311

Good

Over: MISSION CREEK

1.65 MI N OF US 52, LaSalle, IL

Built 2010 Load: 97.2 t ADT: 5,100

IL 71 FAP 311

Good

Over: CREEK & CATTLE XING

0.32 MI N. OF US 52, LaSalle, IL

Built 2010 Load: 97.2 t ADT: 5,100

US 6

Good

Over: NW Half Conveyor B

2.69 M E of IL 351, LaSalle, IL

Built 1985 Load: 99.9 t ADT: 9,050

US 34 /FAP 68

Poor

Over: LITTLE INDIAN CREEK

3.6 MI NE/ILL 23 (S), LaSalle, IL

Built 1952 ADT: 4,100

ROCKWELL RD

Poor

Over: VERMILION RIVER

E OF UNION ST, LaSalle, IL

Built 1940 ADT: 250

US ROUTE 52

Poor

Over: FOX RIVER

2.10 MI W OF ILL 71, LaSalle, IL

Built 1931 Load: 10.7 t ADT: 1,850

WASHINGTON ST

Poor

Over: GUM CREEK

WASH ST OV GUM CR, LaSalle, IL

Built 1920 Load: 14.3 t ADT: 175

TR-4

Poor

Over: BRUSH CREEK

E 0TH N 3905, LaSalle, IL

Built 1972 Load: 15.2 t ADT: 100

OR 2500 UTICA SHOR

Poor

Over: CLARK RUN

N 2853,E 790, LaSalle, IL

Built 1976 Load: 16.2 t ADT: 1,400

TR 122

Poor

Over: PRAIRIE CR

E 7TH N 580, LaSalle, IL

Built 1969 Load: 17.2 t ADT: 25

TR 232

Poor

Over: CROOKED LEG CREEK

E 13TH N 4150, LaSalle, IL

Built 1961 Load: 19.4 t ADT: 50

UNION ST

Poor

Over: GUM CR

UNION ST OV GUM CR, LaSalle, IL

Built 1920 Load: 19.4 t ADT: 125

POST ST

Poor

Over: GOOSE CR

300FT N OF PRAIRIE, LaSalle, IL

Built 1940 Load: 19.4 t ADT: 650

RD TO LANDFILL

Poor

Over: ILL RV BACK WATER

E 209TH N 2605, LaSalle, IL

Built 1932 Load: 20.1 t ADT: 75

SENECA ST#2300

Poor

Over: STREAM

N 2553,E 2890, LaSalle, IL

Built 1965 Load: 21.4 t ADT: 1,600

TR-222

Poor

Over: TRIB INDIAN CR

E 1250TH N 4630, LaSalle, IL

Built 1977 Load: 21.4 t ADT: 250

I-39 NB/US 51 NB

Poor

Over: TOMAHAWK CREEK

3.5 MI N OF I-80, LaSalle, IL

Built 1979 Load: 21.7 t ADT: 9,300

TR-43

Poor

Over: SOMONAUK CREEK

N 45TH E 2602, LaSalle, IL

Built 1953 Load: 21.7 t ADT: 100

FAU 6166

Poor

Over: EAGLE CREEK

E 16TH N 1399, LaSalle, IL

Built 1960 Load: 22.7 t ADT: 75

TR-148

Poor

Over: DRAINAGE DITCH

E 8TH N 4270, LaSalle, IL

Built 1969 Load: 23.0 t ADT: 10

US 34 FAP 587

Poor

Over: INDIAN CREEK

12.88 MI E OF IL 251, LaSalle, IL

Built 1952 Load: 24.3 t ADT: 2,000

US 6

Poor

Over: N. KICKAPOO CR

8.39 MI E OF ILL 71, LaSalle, IL

Built 1980 Load: 25.3 t ADT: 2,850

TR-332

Poor

Over: COVEL CREEK

E 20TH N 2440, LaSalle, IL

Built 1970 Load: 25.6 t ADT: 50

ILL 23 FAP 68

Poor

Over: COVEL CREEK

4.95 MI S OF ILL 71, LaSalle, IL

Built 1960 Load: 25.9 t ADT: 5,550

TR 310

Poor

Over: WOLF CREEK

E 18TH N 1625, LaSalle, IL

Built 1964 Load: 26.9 t ADT: 400

US 52

Poor

Over: MISSION CREEK

0.3 MI W OF ILL 71, LaSalle, IL

Built 1930 Load: 27.9 t ADT: 1,850

TR-112-A

Poor

Over: BR FOURMILE GROVE CR

E 6TH N 4640, LaSalle, IL

Built 1961 Load: 28.5 t ADT: 25

TR 123

Poor

Over: LITTLE INDIAN CREEK

N 41ST E 2110, LaSalle, IL

Built 1962 Load: 28.8 t ADT: 175

TR 535

Poor

Over: PRAIRIE CREEK

N 14TH E 1975, LaSalle, IL

Built 1974 Load: 28.8 t ADT: 275

TR 322

Poor

Over: COUEL CREEK

E 19TH N 2275, LaSalle, IL

Built 1973 Load: 29.2 t ADT: 50

ILL 170

Poor

Over: ILL MICH CANAL

0.42 MI S OF US 6, LaSalle, IL

Built 1940 Load: 29.8 t ADT: 5,550

TR-177

Poor

Over: TOMAHAWK CREEK

N 38TH E 815, LaSalle, IL

Built 1964 Load: 30.1 t ADT: 10

I-39 SB/US 51SB

Poor

Over: C & NW RR

0.21 MI N OF US 52, LaSalle, IL

Built 1977 Load: 30.8 t ADT: 9,350

CO RD 57

Poor

Over: VERMILION RIVER

E 12TH,N 1915, LaSalle, IL

Built 1969 Load: 30.8 t ADT: 200

TR 354

Poor

Over: COVEL CREEK

E 21ST N 2240, LaSalle, IL

Built 1973 Load: 30.8 t ADT: 25

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

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