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 128A

Poor

Over: TOMAHAWK CR

E 7TH N 3610, LaSalle, IL

Built 1963 Load: 31.1 t ADT: 25

Powell St.

Poor

Over: Coal Run Creek

R3E, T31N 3rd PM, LaSalle, IL

Built 1984 Load: 32.4 t ADT: 175

TR-18-A

Poor

Over: SANDY CREEK

E 1ST N 1290, LaSalle, IL

Built 1963 Load: 32.7 t ADT: 10

TR 535

Poor

Over: PRAIRE CREEK

N 14TH E 1950, LaSalle, IL

Built 1974 Load: 34.7 t ADT: 275

TR 203

Poor

Over: SPRING CREEK

N 36TH E 150, LaSalle, IL

Built 1977 Load: 34.7 t ADT: 175

US 6 FAP 623

Poor

Over: FOX RIVER

0.68 MI E OF ILL 23, LaSalle, IL

Built 1928 Load: 37.9 t ADT: 10,700

WATER ST/N 4550TH

Poor

Over: INDIAN CREEK

0.44 MI N OF US 34, LaSalle, IL

Built 1925 Load: 38.2 t ADT: 275

ILL 71 AT CEDAR PT

Poor

Over: CEDAR CREEK

2.95 MI W OF US 51, LaSalle, IL

Built 1929 Load: 38.6 t ADT: 2,250

Coal Street

Poor

Over: Coal run Creek

0.5 Mi S. of Ill. 18, LaSalle, IL

Built 1984 Load: 40.5 t ADT: 125

CH 52

Poor

Over: LITTLE INDIAN CREEK

E. 1950 TH N 4775, LaSalle, IL

Built 1992 Load: 49.6 t ADT: 850

TR 158

Poor

Over: TOMAHAWK CREEK

E 9TH N 3960, LaSalle, IL

Built 1975 Load: 54.4 t ADT: 25

ILL 23 FAP 68

Poor

Over: COVEL CREEK

3.35 MI S OF ILL 71, LaSalle, IL

Built 1953 Load: 56.1 t ADT: 5,550

MS-7711 (GLENN ST)

Structurally Deficient

Over: LONG CREEK

GLENN OV LONG CR, LaSalle, IL

Built 1964 ADT: 525

FAS 174/CH 9

Structurally Deficient

Over: PECUMSAGAN CREEK

E 12TH,N 3225, LaSalle, IL

Built 1962 Load: 6.2 t ADT: 150

TR 225

Structurally Deficient

Over: SPRING CREEK

N 34TH E 090, LaSalle, IL

Built 1965 Load: 7.1 t ADT: 125

TR-359 A

Structurally Deficient

Over: STREAM

N 2649 E 2425, LaSalle, IL

Built 1971 Load: 8.7 t ADT: 50

TR-2 LASALLE RD

Structurally Deficient

Over: WAUPECON CR

.5 MI N GARDNER RD, LaSalle, IL

Built 1963 Load: 9.1 t ADT: 25

CH 23 EXT

Structurally Deficient

Over: ILL CENTRAL RR

WALNUT ST OVER IC RR, LaSalle, IL

Built 1942 Load: 15.6 t ADT: 1,600

TR 491

Structurally Deficient

Over: DRAINAGE DITCH

N 18TH E 560, LaSalle, IL

Built 1967 Load: 18.1 t ADT: 150

10TH ST

Structurally Deficient

Over: FIRST CR

10TH ST W OF 1ST AVE, LaSalle, IL

Built 1947 Load: 19.4 t ADT: 100

MS6240 (INDIANA AV

Structurally Deficient

Over: MENDOTA CR

100 FT N BURLINGTON, LaSalle, IL

Built 1916 Load: 22.0 t ADT: 100

TR 239

Structurally Deficient

Over: SPRING CREEK

N 33RD E 050, LaSalle, IL

Built 1964 Load: 23.7 t ADT: 225

TR-211

Structurally Deficient

Over: L Vermillion river

N 35TH E 350, LaSalle, IL

Built 1963 Load: 24.3 t ADT: 200

TR 402

Structurally Deficient

Over: OTTER CREEK

E 24TH N 1550, LaSalle, IL

Built 1959 Load: 24.3 t ADT: 50

TR 37

Structurally Deficient

Over: LITTLE INDIAN CREEK

N 45TH,E 2150, LaSalle, IL

Built 1974 Load: 28.2 t ADT: 200

FAS261 CH34

Structurally Deficient

Over: STREAM

N 27TH,E 950, LaSalle, IL

Built 1961 Load: 28.5 t ADT: 1,000

TR-282

Structurally Deficient

Over: Covel Creek

E 16TH N 2275, LaSalle, IL

Built 1966 Load: 31.4 t ADT: 100

CO RD 15

Structurally Deficient

Over: WALBRIDGE CREEK

E 24TH,N 2885, LaSalle, IL

Built 1971 Load: 31.4 t ADT: 4,700

TR-20A

Structurally Deficient

Over: SPRING CREEK

E 1ST N 3660, LaSalle, IL

Built 1977 Load: 33.4 t ADT: 100

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