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)

METRO LINK

Unknown

Over: CARLYLE AVE

IN BELLEVILLE, St. Clair, IL

Built 1999 ADT: 4,900

METRO LINK

Unknown

Over: MCCLINTOCK AVE

.04 E OF MCKINLEY, St. Clair, IL

Built 1999 ADT: 7,200

METRO LINK

Unknown

Over: GREENMOUNT RD

.68MI SOUTH OF IL161, St. Clair, IL

Built 1999 ADT: 15,600

METRO LINK

Unknown

Over: "B" ST.

.04 E OF N IOWA, St. Clair, IL

Built 1999 ADT: 2,150

METRO LINK

Unknown

Over: FULLERTON ROAD

.50 MI W OF IL 159, St. Clair, IL

Built 1999 ADT: 6,850

TRRA

Unknown

Over: TRENDLEY AV/FAU 9188

05M W MAINON TRENDLE, St. Clair, IL

Built 1890 ADT: 250

CSX RAILROAD

Unknown

Over: MS 6010/MILL STREET

SW EDGE OFSUMMERFL'D, St. Clair, IL

Built 1900 ADT: 50

ILL CENTRAL RR

Unknown

Over: MS 7420A/10TH STREET

BELLEVILLE, St. Clair, IL

Built 1901 ADT: 475

NS RR

Unknown

Over: CATAWBA ST

.10M N OF "E" ST, St. Clair, IL

Built 1899 ADT: 25

OLD BALDWIN RD

Fair

Over: LIVELY CREEK

0.30 MI S IL 13, St. Clair, IL

Built 1901 Load: 17.5 t ADT: 675

COLLINSVILLE RD

Fair

Over: SCHOENBERGER CK

0.5 M E JCT ILL 203, St. Clair, IL

Built 1947 Load: 19.4 t ADT: 3,150

40TH ST - E ST LOU

Fair

Over: SCHOENBER GER CREEK

0.03 N OF PARK DR, St. Clair, IL

Built 1935 Load: 19.4 t ADT: 10

SCHALLER RD/ CH 67

Fair

Over: CREEK

1.0MI SW LENZBURG, St. Clair, IL

Built 1943 Load: 19.8 t ADT: 175

BUNKUM RD/ FAU 916

Fair

Over: DITCH

0.25MI W ILL 157, St. Clair, IL

Built 1960 Load: 20.4 t ADT: 4,050

CH 50

Fair

Over: RAYHILL SLOUGH

1.50MI S ILL 177, St. Clair, IL

Built 1954 Load: 21.1 t ADT: 475

IL 3 NB Ramp "F" P

Fair

Over: Abandoned Southern RR

ABUT F-1 TO PIER P-1, St. Clair, IL

Built 1971 Load: 22.4 t ADT: 23,900

DOUGLAS ST/ FAU 92

Fair

Over: RICHLAND CREEK

BELLEVILLE, St. Clair, IL

Built 1948 Load: 22.7 t ADT: 3,600

Ramp to IL 3 SB "E

Fair

Over: Abandoned Southern RR

ABUT E-9 TO P-O17, St. Clair, IL

Built 1971 Load: 23.0 t ADT: 23,900

TOWN HALL RD/ TR 9

Fair

Over: WAELTI CR

3.5 MI W 59 ST, St. Clair, IL

Built 1971 Load: 23.0 t ADT: 375

I-55/64/70 EB CD "

Fair

Over: UPRR

pier H-1 to abut H-5, St. Clair, IL

Built 1969 Load: 23.7 t ADT: 19,300

TOWN HALL RD/ CH 2

Fair

Over: REINHARDT SLOUGH

1.2MI E ILL RTE 4, St. Clair, IL

Built 1970 Load: 24.3 t ADT: 350

JEFFERSON RD/ CH 2

Fair

Over: JACKSON SLOUGH

1.0 MI E ILL 4, St. Clair, IL

Built 1978 Load: 24.3 t ADT: 200

TR 240

Fair

Over: HOG CREEK

2 MI S ILL 177, St. Clair, IL

Built 1942 Load: 24.3 t ADT: 450

LUNCH RD/ TR 122

Fair

Over: DOUGLAS CREEK

0.2 MI S. SCHMIDT RD, St. Clair, IL

Built 1923 Load: 24.3 t ADT: 225

PERRIN RD/ TR 264

Fair

Over: LITTLE SILVER CR

1 MI E IL 4, St. Clair, IL

Built 1957 Load: 24.3 t ADT: 50

"C" STREET

Fair

Over: RICHLAND CREEK

0.25M W ILL 159, St. Clair, IL

Built 1948 Load: 24.3 t ADT: 850

FAU 9269

Fair

Over: RICHLAND CREEK

AT 6TH ST, St. Clair, IL

Built 1950 Load: 24.3 t ADT: 3,550

SOUTH THIRD STREET

Fair

Over: RICHLAND CREEK

0.10 N CLEVELAND, St. Clair, IL

Built 1921 Load: 24.3 t ADT: 550

ILL 161

Fair

Over: OVERFLOW SILVER CR

1.8 M E ILL 158, St. Clair, IL

Built 1932 Load: 24.6 t ADT: 4,950

ILL 15

Fair

Over: DRUM HILL BRANCH

1.5 M W FAYETTEVILLE, St. Clair, IL

Built 1928 Load: 25.9 t ADT: 2,200

32ND ST - E.ST LOU

Fair

Over: SCHOENBERGER CREEK

0.06 N OF PARK DR, St. Clair, IL

Built 1935 Load: 25.9 t ADT: 10

36TH ST E ST LOUIS

Fair

Over: SCHOENBERGER CREEK

0.01, St. Clair, IL

Built 1935 Load: 25.9 t ADT: 10

ILL 177 / IL 158

Fair

Over: CREEK

1.5 mi E of IL 159, St. Clair, IL

Built 1959 Load: 26.2 t ADT: 7,300

IL 15 / Missouri A

Fair

Over: A&SRR

0.50 mi NW of IL 163, St. Clair, IL

Built 1980 Load: 26.6 t ADT: 13,800

CH 68 LENZBURG EAS

Fair

Over: BRANCH OF MUD CREEK

0.1MI WEST ILL RTE 4, St. Clair, IL

Built 1972 Load: 26.6 t ADT: 250

26th

Fair

Over: NSRR

0.2mi SW of IL 15, St. Clair, IL

Built 1936 Load: 27.5 t ADT: 6,150

ILL 159

Fair

Over: BR RICHLAND CREEK

at IL 13/158/177 INT, St. Clair, IL

Built 1955 Load: 28.2 t ADT: 14,200

UNION HILLRD/FAU91

Fair

Over: TRIB SCHOENBERGER CR

2.25 MI N ILL 161, St. Clair, IL

Built 1981 Load: 28.2 t ADT: 8,650

SUNNYSIDE SCH TR 2

Fair

Over: EAST BRANCH

3 MI N US 50, St. Clair, IL

Built 1941 Load: 28.2 t ADT: 50

WB CD TO IL3 SB "0

Fair

Over: GROUND

PSC ABUT 0-11->P-017, St. Clair, IL

Built 1971 Load: 28.8 t ADT: 23,900

IL 13 New Athens

Fair

Over: KASKASKIA RIVER

W OF NEW ATHENS, St. Clair, IL

Built 1972 Load: 29.8 t ADT: 6,900

WB CD TO IL3SB "O1

Fair

Over: UPRR, Access Roads, UPRR

PIER G1 TO ABUT O-10, St. Clair, IL

Built 1971 Load: 29.8 t ADT: 5,300

PSB I-55,64;US 40

Fair

Over: MISSISSIPPI RIVER

POPLAR ST BR - MoDOT, St. Clair, IL

Built 1963 Load: 30.5 t ADT: 117,700

KORTE SEWALD TR 26

Fair

Over: BR LITTLE SILVER CR

0.5 MI N FAUST RD, St. Clair, IL

Built 1960 Load: 30.5 t ADT: 50

ILL 177

Fair

Over: RAYHILLS SLOUGH

3.1 M E JCT ILL 4, St. Clair, IL

Built 1920 Load: 31.4 t ADT: 2,000

FAI 64 EB

Fair

Over: HARDING DITCH

1.04 MI E OF ILL 111, St. Clair, IL

Built 1968 Load: 31.4 t ADT: 40,050

ILL 161

Fair

Over: SILVER CREEK

2.2 M E JCT 158, St. Clair, IL

Built 1932 Load: 31.8 t ADT: 4,950

IL 13

Fair

Over: ICRR

1.5 mi SE of New Athens, St. Clair, IL

Built 1971 Load: 31.8 t ADT: 4,000

IL 159

Fair

Over: CSXRR

0.25mi N of I-64, St. Clair, IL

Built 1973 Load: 31.8 t ADT: 20,500

FAU 9218

Fair

Over: PRAIRIE DUPONT CK

.10 MI S ILL 157, St. Clair, IL

Built 1992 Load: 31.8 t ADT: 2,300

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