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)

Sort:

TR 352 E 21ST

Over: INDIAN CREEK

E 21ST N 4695, LaSalle, IL

Built 1979 Load: 33.7 t ADT: 25

TR 441

Over: TRIB COVEL CR

N 22ND E 1820, LaSalle, IL

Built 1967 Load: 34.7 t ADT: 75

TR 68A

Over: BAILEY CREEK

E 4TH N 1950, LaSalle, IL

Built 1981 Load: 34.7 t ADT: 75

CH 44

Over: LONG POINT CREEK

4.10 MI S OF ILL 17, LaSalle, IL

Built 1984 Load: 35.6 t ADT: 1,300

TR 416-A

Over: BRUMBACK CREEK

E 25TH N 3400, LaSalle, IL

Built 1964 Load: 35.6 t ADT: 200

E 8TH TR 142B

Over: LONG POINT CREEK

E8TH N010, LaSalle, IL

Built 1980 Load: 35.6 t ADT: 25

I-39/US 51

Over: CONVEYOR BELT/PVT RD

0.43 MI S OF US 6, LaSalle, IL

Built 1985 Load: 36.0 t ADT: 19,400

CO RD 42

Over: BUCK CREEK

E 15TH,N 3400, LaSalle, IL

Built 1934 Load: 36.0 t ADT: 450

CH 42-TERRA COTTA

Over: STREAM

2912 E15, LaSalle, IL

Built 1994 Load: 36.0 t ADT: 375

TR 97

Over: LITTLE INDIAN CR

N 4275 E 2190, LaSalle, IL

Built 1973 Load: 36.3 t ADT: 75

TR 354

Over: COUEL CREEK

E 21ST N 2050, LaSalle, IL

Built 1970 Load: 36.3 t ADT: 25

US 6

Over: GUM CREEK

6.08 MI E OF ILL 71, LaSalle, IL

Built 1926 Load: 36.6 t ADT: 2,450

I-80 WB

Over: FOX RIVER

2.5 M E OF ILL 23, LaSalle, IL

Built 1996 Load: 36.6 t ADT: 13,700

I-80 EB

Over: FOX RIVER

2.5 MI E OF IL 23, LaSalle, IL

Built 1995 Load: 36.6 t ADT: 13,700

TR 332 B

Over: WOLF CREEK

E 20TH N 1810, LaSalle, IL

Built 1969 Load: 36.6 t ADT: 25

TR-187

Over: SPRING CREEK

N 37TH E 160, LaSalle, IL

Built 1970 Load: 36.9 t ADT: 200

FAS 256

Over: LITTLE VERMILLION

N42ND E700TH, LaSalle, IL

Built 1972 Load: 37.3 t ADT: 150

FAS 1279

Over: BAILEY CREEK

N 2101,E 600, LaSalle, IL

Built 1969 Load: 37.3 t ADT: 650

TR-49

Over: SUTPHENS RUN

N 45TH E 890, LaSalle, IL

Built 1930 Load: 37.3 t ADT: 25

TR18

Over: CEDAR CR

E 1ST N 2070, LaSalle, IL

Built 1978 Load: 37.3 t ADT: 75

E. 19TH RD,FAU 616

Over: PRAIRIE CREEK

E 19TH N 1410, LaSalle, IL

Built 1935 Load: 37.6 t ADT: 450

TR 334

Over: INDIAN CREEK

N 40TH E 2005, LaSalle, IL

Built 1916 Load: 37.9 t ADT: 200

I-39 SB/US 51 SB

Over: LITTLE VERMILION R.

1.3 MI N.OF US 52, LaSalle, IL

Built 1979 Load: 38.2 t ADT: 9,350

I-39 NB/US 51 NB

Over: LITTLE VERMILION R.

1.3 MI N OF US 52, LaSalle, IL

Built 1979 Load: 38.2 t ADT: 9,350

TR 152

Over: LONG POINT CR

E 9TH N 275, LaSalle, IL

Built 1932 Load: 38.2 t ADT: 25

ILL 23 FAP 68

Over: INDIAN CR

2.63 MI N OF US 52, LaSalle, IL

Built 1972 Load: 38.6 t ADT: 1,700

TR 334

Over: INDIAN CREEK

E 20TH N 3680, LaSalle, IL

Built 1920 Load: 38.9 t ADT: 475

TR 356

Over: STREAM

E 2150TH N 2940, LaSalle, IL

Built 1939 Load: 38.9 t ADT: 50

TR 317

Over: CRI RR & IM CANAL

N.2755 E.1340, LaSalle, IL

Built 1978 Load: 38.9 t ADT: 600

FAI-80 EB

Over: PECUMSAUGAN CRK

5.3 MI E JCT IL 251, LaSalle, IL

Built 1961 Load: 39.2 t ADT: 15,350

FAI-80 WB

Over: PECUMSAUGAN CRK

5.3 MI E OF IL 251, LaSalle, IL

Built 1961 Load: 39.2 t ADT: 15,350

ILL 178

Over: CLARK RUN

1.11 MI S OF US 6, LaSalle, IL

Built 1976 Load: 39.2 t ADT: 4,150

US 52 FAP 607

Over: UNKNOWN STREAM

1.8 MI W OF IL 71, LaSalle, IL

Built 1931 Load: 39.2 t ADT: 1,850

TR-20-A

Over: SPRING CREEK

E 1ST N 3630, LaSalle, IL

Built 1930 Load: 39.2 t ADT: 100

TR 255

Over: L VERMILLION R

N 3179TH E 340, LaSalle, IL

Built 1928 Load: 39.2 t ADT: 100

FAS 260 CH 13

Over: LITTLE VERMILION RV

E4TH, N4051, LaSalle, IL

Built 1987 Load: 39.2 t ADT: 650

IL 23 NB IN STREAT

Over: INTER STREAM

14.30 MI S OF ILL 71, LaSalle, IL

Built 1965 Load: 39.5 t ADT: 8,000

ILL 23 FAP 68

Over: OTTER CR

2.8 MI N. OF ILL 18, LaSalle, IL

Built 1974 Load: 39.5 t ADT: 6,300

TR 322A

Over: OTTER CREEK

E 19TH N 1500, LaSalle, IL

Built 1934 Load: 39.9 t ADT: 275

FAU6046 CHAMPLAIN

Over: GOOSE CREEK

0.20 MI N OF US 6, LaSalle, IL

Built 1933 Load: 40.5 t ADT: 3,150

SHERIDAN ROAD

Over: MISSION CREEK

0.6 MI N OF US 52, LaSalle, IL

Built 1930 Load: 40.5 t ADT: 1,600

ILL 351 FAP 619

Over: LONE STAR CEMENT RR

2.55 MI S OF US 6, LaSalle, IL

Built 1995 Load: 40.8 t ADT: 3,400

CO RD 43

Over: TOMAHAWK CREEK

E 8TH,N 3740, LaSalle, IL

Built 1933 Load: 41.5 t ADT: 500

US 6

Over: PECUMSAGAN CR

5.0 MI E OF ILL 251, LaSalle, IL

Built 1954 Load: 41.8 t ADT: 7,150

I-39/US 51 SB

Over: BAILEY CREEK

0.49 MI S OF CH 54, LaSalle, IL

Built 1989 Load: 42.1 t ADT: 9,700

I-39/US 51 NB

Over: BAILEY CREEK

0.49 MI S OF CH 54, LaSalle, IL

Built 1989 Load: 42.1 t ADT: 9,700

I-39/US 51 SB

Over: Norfolk & Southern RR

1.48 MI N OF ILL 18, LaSalle, IL

Built 1988 Load: 42.4 t ADT: 9,700

I-39/US 51 NB

Over: Norfolk & Southern RR

1.48 MI N OF ILL 18, LaSalle, IL

Built 1988 Load: 42.4 t ADT: 9,700

US 6 W OF MARSEILL

Over: LONG CREEK

4.51 MI E OF ILL 71, LaSalle, IL

Built 1958 Load: 42.8 t ADT: 3,850

ILL 18 WB

Over: VERMILION RIVER

0.10 MI W OF ILL 23, LaSalle, IL

Built 1988 Load: 42.8 t ADT: 4,200

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026