St. Clair County, IL

502 public highway bridges

St. Clair County Bridge Snapshot

St. Clair County, Illinois contains 502 public highway bridges in the FHWA National Bridge Inventory. Roughly 34.7% are rated “Good,” 25.7% “Fair,” 8% “Poor,” and 8% 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.

502

Total Bridges

34.7%

Good

8%

Poor

8%

Structurally Deficient

Condition Distribution

Good

34.7% (174)

Fair

25.7% (129)

Poor

8% (40)

SD

8% (40)

All Bridges (502)

Sort:

FAI 64 WB

Over: ST CLAIR AVE E ST L

ST CLAIR AVE E ST L, St. Clair, IL

Built 1960 ADT: 4,300

FAI 64 WB

Over: EB 55 & Ramp to 64EB

W of Exchange Avenue, St. Clair, IL

Built 1962 ADT: 67,300

Ramp to EB I-64

Over: I-55 EB mainline

WEST OF EXCHANGE AVE, St. Clair, IL

Built 1962 ADT: 67,300

I-55/64; US 40 WB

Over: TRENDLY AVE. E ST L

East of PSC, St. Clair, IL

Built 1965 ADT: 275

I-55/64; US 40 EB

Over: TRENDLY AVE E ST L

3RD BR E POP ST BR, St. Clair, IL

Built 1966 ADT: 275

I-55/64; US 40 WB

Over: 4TH ST in E ST LOU

WB OVER 4TH ST, St. Clair, IL

Built 1965 ADT: 150

I-55/64; US 40 EB

Over: 4TH ST in E ST LOU

EB OVER 4TH ST, St. Clair, IL

Built 1965 ADT: 150

I-55/64; US 40 WB

Over: Broadway & Metrolink

E. St. Louis, St. Clair, IL

Built 1965 ADT: 9,600

I-55/64; US 40 EB

Over: Broadway & Metrolink

E St. Louis, St. Clair, IL

Built 1965 ADT: 9,600

I-55/64; US 40 EB

Over: Missouri Avenue

1/2 mi W 3rd St Exit, St. Clair, IL

Built 1965 ADT: 10

EB 55/MLK EB&WB AP

Over: 3RD ST EXIT to EStL

E ST L - 3rd ST EXIT, St. Clair, IL

Built 1961 ADT: 3,900

3RD ST TO EB I-55/

Over: RAMPS TO/FROM MLK DR

E ST LOUIS, St. Clair, IL

Built 1961 ADT: 800

I-55 WB; US 40 WB

Over: ST CLAIR AVE

W of ESL Tri-level, St. Clair, IL

Built 1960 ADT: 4,300

I-55/64; US 40 EB

Over: RAMPS TO/FROM MLK DR

E ST LOUIS, St. Clair, IL

Built 1961 ADT: 800

RAMP TO IL 203 NB

Over: DRNG CANAL & I-55/70

0.4 M E E ST LOUIS, St. Clair, IL

Built 1960 ADT: 67,300

ILL 203 NB

Over: SB RAMP TO EB 55/70

0.6 M E E ST LOUIS, St. Clair, IL

Built 1960 ADT: 17,200

ILL 203

Over: FAI 70

0.5 M N E ST LOUIS, St. Clair, IL

Built 1960 ADT: 50,300

ILL 15

Over: ILL 157

1.8 M E JCT ILL 163, St. Clair, IL

Built 1940 ADT: 6,850

ILL 15 WB

Over: ILL 158

S BELLEVILLE, St. Clair, IL

Built 1958 ADT: 9,050

ILL 15 EB

Over: ILL 158

S BELLEVILLE, St. Clair, IL

Built 1958 ADT: 9,050

ILL 15 WB

Over: ILL 159

0.30MI S IL 158&177, St. Clair, IL

Built 1957 ADT: 14,200

ILL 15 EB

Over: ILL 159

0.32MI S IL 158&177, St. Clair, IL

Built 1957 ADT: 12,100

ST CLAIR AVENUE

Over: I-55/64; US 40 EB

N of Collinsville Av, St. Clair, IL

Built 1961 ADT: 74,500

FRANK SCOTT PKWY W

Over: ILL 15

1.5 M E JCT 13, St. Clair, IL

Built 1964 ADT: 20,400

ILL 13

Over: ILL 15

SW BELLEVILLE, St. Clair, IL

Built 1959 ADT: 19,700

ILL 13 WB

Over: Ramp from EB IL 15

SW BELLEVILLE, St. Clair, IL

Built 1959 ADT: 12,100

IL 15 EB

Over: IL 13 / Charles St

1.4 M E JCT IL 159, St. Clair, IL

Built 2015 ADT: 450

MISSOURI AV/FAU 91

Over: I-55/64; US 40 WB

1/2 mi W 3RD ST EXIT, St. Clair, IL

Built 1965 ADT: 105,300

I-55/64 WB CD "A"

Over: UPRR,O2,B,C,H,4 ESL st's

PIER A1 TO ABUT A46, St. Clair, IL

Built 1968 ADT: 58,100

WB CD to TudorAv "

Over: G,6th,B,A,C,H,8th,9th,

PIER G12->PIER D36, St. Clair, IL

Built 1969 ADT: 16,700

I-55/64 EB CD "D"

Over: UPRR,O2,8th9th10th,Piggo

PIER D1 TO ABUT D46, St. Clair, IL

Built 1969 ADT: 23,900

IL3NB TO 55/64WB "

Over: UPRR,A,B,C,IL 3 SB Ramp,

PIER P1 TO PIER A5, St. Clair, IL

Built 1969 ADT: 58,100

PiggotAv to EB CD"

Over: Abandoned Southern RR,8t

PIER A35 TO ABUT T6, St. Clair, IL

Built 1969 ADT: 2,350

FAI 64 EB

Over: 18TH ST

0.23 E OF 15TH ST., St. Clair, IL

Built 1968 ADT: 2,800

FAI 64 WB

Over: 18TH ST

0.22 E OF 18TH ST, St. Clair, IL

Built 1974 ADT: 2,800

FAI 64 EB

Over: 25TH STREET

0.49 E OF BAUGH AVE, St. Clair, IL

Built 1973 ADT: 7,450

FAI 64 WB

Over: 25TH ST

0.50 E OF BAUGH AVE, St. Clair, IL

Built 1974 ADT: 7,450

FAI 64 EB

Over: 37TH ST

1 M W ILL 111, St. Clair, IL

Built 1968 ADT: 2,700

FAI 64 WB

Over: 37TH ST

1 M W ILL 111, St. Clair, IL

Built 1968 ADT: 2,700

ILL 111

Over: FAI 64

.39 M N ST CLAIR AVE, St. Clair, IL

Built 1973 ADT: 66,300

BUNKUM RD/ FAU 916

Over: FAI 64

1.99 MI E ILL 157, St. Clair, IL

Built 1971 ADT: 83,000

RUBY LANE/ FAU 932

Over: FAI 64

0.57 MI W OF ILL 159, St. Clair, IL

Built 1970 ADT: 83,000

ILL 159

Over: FAI 64

0.57 MI E RUBY LANE, St. Clair, IL

Built 1971 ADT: 78,800

OLD US 50

Over: FAI 64

2.31 MI E OF ILL 159, St. Clair, IL

Built 1972 ADT: 61,500

S Lincoln Ave

Over: FAI-64

3.74 MI S OF US-50, St. Clair, IL

Built 1971 ADT: 58,600

N Main St / FAU 92

Over: FAI 64

1/2 mi S of US 50, St. Clair, IL

Built 1972 ADT: 58,600

ILL 158 SB

Over: FAI 64

0.58 MI NE OF SHILOH, St. Clair, IL

Built 1973 ADT: 58,600

ILL 158 NB

Over: FAI 64

0.58 MI NE OF SHILOH, St. Clair, IL

Built 1973 ADT: 42,900

SUMMRFIELD Rd-FAS8

Over: FAI-64

3 M E ILL 4, St. Clair, IL

Built 1967 ADT: 34,900

FAI 64 EB

Over: ILL 161

1.5 MI W NEW BADEN, St. Clair, IL

Built 1972 ADT: 3,200

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 5, 2026