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)

TR 324

Fair

Over: CREEK

E 1951ST N 3290, LaSalle, IL

Built 1930 Load: 43.1 t ADT: 50

MS 6490 IN MENDOTA

Fair

Over: L. VERMILLION CR

E 4TH N 4345, LaSalle, IL

Built 1965 Load: 43.7 t ADT: 225

US 34 FAP 587

Fair

Over: SUTPHENS RUN

8.71 MI E OF ILL 251, LaSalle, IL

Built 1984 Load: 45.4 t ADT: 1,800

IL 23 FAP 68

Fair

Over: BUCK CREEK

3.0 MI S OF US 52, LaSalle, IL

Built 2012 Load: 45.4 t ADT: 3,350

ILL 351/FAP619

Fair

Over: IL RIVER

1.0 MI. S OF US 6, LaSalle, IL

Built 2003 Load: 46.0 t ADT: 5,250

ILL 71

Fair

Over: COVEL CR

7.38 MI E OF ILL 178, LaSalle, IL

Built 1981 Load: 46.3 t ADT: 1,650

US 6 FAP 623

Fair

Over: LITTLE VERMILION R

2.15 MI E OF IL 251, LaSalle, IL

Built 1966 Load: 47.3 t ADT: 9,050

ILL 351 FAP 619

Fair

Over: LONE STAR CEMENT RR

2.0 MI S OF US 6, LaSalle, IL

Built 1939 Load: 48.3 t ADT: 4,250

US RT 6

Fair

Over: WALBRIDGE CREEK

3.63 MI E OF ILL 71, LaSalle, IL

Built 1958 Load: 50.9 t ADT: 3,850

TR 322A

Fair

Over: WOLF CR

E 19TH N 1690, LaSalle, IL

Built 1954 Load: 53.1 t ADT: 275

I-39/US 51 SB

Fair

Over: SANDY CREEK

1.23 MI N OF ILL 18, LaSalle, IL

Built 1988 Load: 54.1 t ADT: 9,700

I-39/US 51 NB

Fair

Over: SANDY CREEK

1.22 MI N OF ILL 18, LaSalle, IL

Built 1988 Load: 54.1 t ADT: 9,700

FAI-80 EB

Fair

Over: B.N. RR

2.0 MI E OF ILL 23, LaSalle, IL

Built 1959 Load: 57.0 t ADT: 13,700

FAI-80 WB

Fair

Over: B.N. RR

2.0 MI E OF ILL 23, LaSalle, IL

Built 1959 Load: 57.0 t ADT: 13,700

CAMPGROUND ENTRANC

Fair

Over: PERSON CREEK

ILLINI PARK RD WEST, LaSalle, IL

Built 1995 Load: 57.3 t ADT: 325

CO RD 55

Fair

Over: PERSON CREEK

N 2653,E 2325, LaSalle, IL

Built 1934 Load: 57.7 t ADT: 1,300

TR 205

Fair

Over: BUCK CREEK

N 36TH E 1415, LaSalle, IL

Built 1934 Load: 64.2 t ADT: 50

FAI 39,US 51

Fair

Over: STREAM

1.5 MI S OF US 34, LaSalle, IL

Built 1978 Load: 79.7 t ADT: 18,700

I-39

Fair

Over: SE Half Conveyor B

0.05 M S of US 6, LaSalle, IL

Built 1961 Load: 89.1 t ADT: 19,400

FAS2256 CH19

Fair

Over: DRAINAGE DITCH

N 39TH,E 850, LaSalle, IL

Built 1964 Load: 89.1 t ADT: 275

OR 11

Fair

Over: PERSON CREEK

ILLINI PARK RD WEST, LaSalle, IL

Built 1984 Load: 89.1 t ADT: 325

ILL 71

Fair

Over: STREAM

1.8 MI S OF US 52, LaSalle, IL

Built 1942 Load: 97.2 t ADT: 5,250

TR 454 A

Good

Over: Trib Waupecan Creek

E 28th, N 1772, LaSalle, IL

Built 1930 Load: 24.3 t ADT: 20

TR 137

Good

Over: Spring Creek

0.5 Mi W. of US 52, LaSalle, IL

Built 1930 Load: 24.3 t ADT: 150

TR-48

Good

Over: BAILEY CREEK

E 3RD N 1840, LaSalle, IL

Built 1968 Load: 25.3 t ADT: 150

TR-49

Good

Over: L. VERMILLION CR.

N 45TH E 480, LaSalle, IL

Built 1953 Load: 25.9 t ADT: 100

US 52 FAP 607

Good

Over: INDIAN CREEK

2.12 MI E OF ILL 23, LaSalle, IL

Built 1988 Load: 29.2 t ADT: 1,500

US 52

Good

Over: BUCK CREEK

12.22 MI E OF IL 251, LaSalle, IL

Built 1997 Load: 29.5 t ADT: 1,200

FAS268 B/CH15

Good

Over: PERSON CREEK

E 22ND,N 2600, LaSalle, IL

Built 1955 Load: 29.5 t ADT: 900

TOW PATH ROAD

Good

Over: CLARKS RUN

0.6 MI. E ILL 178, LaSalle, IL

Built 1967 Load: 31.8 t ADT: 25

TR 310

Good

Over: BR COVEL CREEK

E 18TH N 2330, LaSalle, IL

Built 1930 Load: 32.1 t ADT: 100

IL 23 SB IN STREAT

Good

Over: PRAIRIE CREEK

14.30 MI S OF ILL 71, LaSalle, IL

Built 1965 Load: 32.4 t ADT: 7,700

IL 71

Good

Over: INTER STREAM

.27 MILE N US 6, LaSalle, IL

Built 1999 Load: 32.4 t ADT: 7,400

IL 178 FAS 1279

Good

Over: CLARK RUN

0.92 MI S OF US 6, LaSalle, IL

Built 2007 Load: 32.4 t ADT: 3,550

I-80 EB & WB

Good

Over: CLARK RUN CREEK

1.8 MI E JC I 80 178, LaSalle, IL

Built 2004 Load: 32.4 t ADT: 29,300

IL 178 FAS 1279

Good

Over: CREEK

2.25 MI S OF IL 71, LaSalle, IL

Built 2007 Load: 32.4 t ADT: 2,750

IL 178 FAS 1279

Good

Over: STREAM

0.60 MI S OF IL 71, LaSalle, IL

Built 2007 Load: 32.4 t ADT: 2,750

IL 71 FAP 311

Good

Over: INTERM. STREAM

2.57 MI N OF I-80, LaSalle, IL

Built 2008 Load: 32.4 t ADT: 5,600

IL 17 FAP 649

Good

Over: S BR MOON CREEK

0.8 MI E/OLD IL 179, LaSalle, IL

Built 2009 Load: 32.4 t ADT: 900

IL 71/FAP 619

Good

Over: UNNAMED TRIB.VERM RV

0.40 MI NE IL 251, LaSalle, IL

Built 2011 Load: 32.4 t ADT: 1,300

US 6 / FAP 623

Good

Over: creek

1.91 mi W of IL 170, LaSalle, IL

Built 2013 Load: 32.4 t ADT: 2,850

IL 170 FAP 786

Good

Over: Hog Run

5.93 mi S of US 6, LaSalle, IL

Built 2014 Load: 32.4 t ADT: 1,200

IL 170 FAP 786

Good

Over: Unnamed Creek

6.98 mi S of US 6, LaSalle, IL

Built 2014 Load: 32.4 t ADT: 1,200

CO HWY 43

Good

Over: PECUMSAGANCREEK

3 MI N OF UTICA ILL, LaSalle, IL

Built 1979 Load: 32.4 t ADT: 950

TR 270 E 1525TH

Good

Over: INDIAN CREEK

E 1525 N 4750, LaSalle, IL

Built 1979 Load: 32.4 t ADT: 125

CH 43 E 8TH RD

Good

Over: TOMAHAWK CREEK

E 8TH N3690, LaSalle, IL

Built 1980 Load: 32.4 t ADT: 900

TR 52 E 3RD

Good

Over: LITTLE VERMILION

E 3RD N 4100, LaSalle, IL

Built 1980 Load: 32.4 t ADT: 825

TR 160 E 9TH

Good

Over: SUTPHENS RUN

E 9TH N 4615, LaSalle, IL

Built 1980 Load: 32.4 t ADT: 25

TR 571

Good

Over: STREAM

N 1ST E 1050, LaSalle, IL

Built 1982 Load: 32.4 t ADT: 50

TR 284 E 16TH

Good

Over: BUCK CREEK

E16TH N 3450TH, LaSalle, IL

Built 1983 Load: 32.4 t ADT: 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