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)

OLD US 50

Fair

Over: ROCK SPRING BROOK

EAST O'FALLON, St. Clair, IL

Built 1952 Load: 35.3 t ADT: 8,600

I-55/70 & US 40 WB

Fair

Over: DRAINAGE CANAL

1/2 mi E of E St Lou, St. Clair, IL

Built 1960 Load: 35.6 t ADT: 33,650

I-64 EB

Fair

Over: TRRA

0.3mi W of 25th St., St. Clair, IL

Built 1968 Load: 35.6 t ADT: 37,900

I-64 WB

Fair

Over: TRRA

0.3mi W of 25th St., St. Clair, IL

Built 1968 Load: 35.6 t ADT: 37,900

FAI 255

Fair

Over: P.DUPONT&BLUE WATERS

.50 M SW OF ILL 157, St. Clair, IL

Built 1981 Load: 36.6 t ADT: 31,400

ILL 177

Fair

Over: LOOP CREEK

3.9 MI W JNC ILL 4, St. Clair, IL

Built 1990 Load: 36.6 t ADT: 7,150

BALDWIN RD/ FAS 84

Fair

Over: DOZA CREEK

4.26 MI S ILL RTE 13, St. Clair, IL

Built 1971 Load: 36.6 t ADT: 1,300

FAI 64 EB

Fair

Over: SILVER CREEK

1.79 MI E OF ILL 158, St. Clair, IL

Built 1971 Load: 36.9 t ADT: 20,950

SKAER RD/ TR 126

Fair

Over: WEST FORK CREEK

2.2 MI S C.H. 21, St. Clair, IL

Built 1969 Load: 36.9 t ADT: 25

STATE ST/ FAU 9182

Fair

Over: HARDING DITCH

.5 M.S FAU9166/US50, St. Clair, IL

Built 1981 Load: 38.9 t ADT: 5,950

SUMMERFIELD CH 50

Fair

Over: RHEINHARDT SLOUGH

1.3MI N ILL RTE 177, St. Clair, IL

Built 1943 Load: 39.5 t ADT: 250

ILL 163

Fair

Over: HARDING DITCH

50 FT E ILL 157, St. Clair, IL

Built 1975 Load: 40.2 t ADT: 3,350

ILL 163

Fair

Over: CANAL NO 1LEVEE DIST

0.17 MI SE ILL 157, St. Clair, IL

Built 1975 Load: 41.5 t ADT: 3,350

I-255 RAMP E

Fair

Over: BLUE WATERS DITCH

0.50 MI S DORIS AVE, St. Clair, IL

Built 1980 Load: 41.5 t ADT: 2,800

ILL 4 & 15

Fair

Over: KASKASKIA OVERFLOW

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

Built 1946 Load: 43.4 t ADT: 3,600

I-64 WB

Fair

Over: A&SRR

0.67 mi E of IL 111, St. Clair, IL

Built 1968 Load: 43.4 t ADT: 38,350

I-55/64 EB CD Q-LI

Fair

Over: GROUND

PIER D26 TO PIER P14, St. Clair, IL

Built 1969 Load: 43.7 t ADT: 18,100

GREEN MT RD-FAU 91

Fair

Over: LOOP CREEK

0.20M N OF IL 177, St. Clair, IL

Built 1967 Load: 44.1 t ADT: 15,600

I-64 EB

Fair

Over: A&SRR

0.67 mi E of IL 111, St. Clair, IL

Built 1968 Load: 44.1 t ADT: 36,600

FAI 255 NB

Fair

Over: HARDING DITCH south

0.5 MI N ST CLAIR AV, St. Clair, IL

Built 1982 Load: 44.7 t ADT: 22,300

IL 15

Fair

Over: NSRR, ICRR

.70MI E JCT IL 157, St. Clair, IL

Built 1940 Load: 46.7 t ADT: 28,700

I 255 NB RMP 1609

Fair

Over: CANTEEN CREEK

.50 S MADISON CO LIN, St. Clair, IL

Built 1983 Load: 48.6 t ADT: 1,850

ILL 13 & 15 WB

Fair

Over: TRIB TO RICHLAND CRK

1.7 M E JCT ILL 159, St. Clair, IL

Built 1955 Load: 49.6 t ADT: 12,600

ILL 13 & 15 EB

Fair

Over: TRIB TO RICHLAND CRK

1.7 M E JCT ILL 159, St. Clair, IL

Built 1955 Load: 49.6 t ADT: 12,600

ILL 3

Fair

Over: CAHOKIA CANAL

0.3 M N NATIONAL CTY, St. Clair, IL

Built 1935 Load: 49.6 t ADT: 4,600

W. WINTERS STREET

Fair

Over: ASH CREEK

700' WEST OF WARD DRIVE, St. Clair, IL

Built 1980 Load: 49.9 t ADT: 8,500

FAI 255 NB

Fair

Over: HARDING DITCH north

1.9MI N FAI 64, St. Clair, IL

Built 1985 Load: 50.2 t ADT: 21,750

FAU 9172

Fair

Over: ENGLE CREEK BRANCH

2.20 MI N US 50, St. Clair, IL

Built 1963 Load: 50.9 t ADT: 4,400

LAKE DR/ FAU 9185

Fair

Over: CANAL #1 LEVEE DIST

.11 MI W IL 157, St. Clair, IL

Built 1978 Load: 51.5 t ADT: 3,700

N CO RD/ FAU 9380

Fair

Over: DRAINAGE DITCH

0.44 M N IL 177, St. Clair, IL

Built 1962 Load: 53.1 t ADT: 2,450

FAS 841

Fair

Over: WEST FORK CREEK

4.5MI S JCT ILL 158, St. Clair, IL

Built 1959 Load: 56.4 t ADT: 3,250

ST CLAIR AVE EB

Fair

Over: HARDING DITCH

1.5 M W ILL 157, St. Clair, IL

Built 1959 Load: 66.7 t ADT: 5,900

ILL 157

Fair

Over: Trib to Harding Dtch

0.08 S BUNKUM RD, St. Clair, IL

Built 1966 Load: 70.0 t ADT: 11,600

CRTIS-STNBRG/FAU92

Fair

Over: GOOSE LAKE Ditch

I/2 MI.W CH 19, St. Clair, IL

Built 1901 Load: 72.9 t ADT: 850

CONCORDIA CH RD/CH

Fair

Over: BRANCH PRARE DU PONT

2.3MI E ILL RTE 163, St. Clair, IL

Built 1967 Load: 87.2 t ADT: 800

CONCORDIA CH RD/CH

Fair

Over: PRAIRIE DU PONT CR

1.2MI E ILL RTE 163, St. Clair, IL

Built 1967 Load: 89.1 t ADT: 800

JACKS RUN RD/FAU93

Fair

Over: JACKS RUN

1.0MI E ILL RTE 13, St. Clair, IL

Built 1971 Load: 89.1 t ADT: 175

RICHTER TR 278

Fair

Over: BRANCH SILVER CREEK

0.25 MIN SBI 161, St. Clair, IL

Built 1982 Load: 89.1 t ADT: 10

RISDON SCHOOL TR 1

Good

Over: BRANCH DOZA CREEK

6 MI WEST OF MARISSA, St. Clair, IL

Built 1967 Load: 13.0 t ADT: 225

NORTH 2ND ST/FAU92

Good

Over: RICHLAND CREEK

BELLEVILLE, St. Clair, IL

Built 1956 Load: 15.2 t ADT: 750

MONROE ST/ FAU 927

Good

Over: RICHLAND CREEK

0.32M W ILL 159, St. Clair, IL

Built 1956 Load: 16.8 t ADT: 1,700

ILL 161

Good

Over: TRIB TO SILVER CREEK

0.1 MI E ILL 4, St. Clair, IL

Built 1933 Load: 21.4 t ADT: 6,650

TOWNSEND RD/ TR 5C

Good

Over: LITTLE SILVER CREEK

1 MI E ILL 4, St. Clair, IL

Built 1941 Load: 24.3 t ADT: 50

PROBST RD/ TR 126

Good

Over: BR. RICHLAND CREEK

0.25 MI N ILL 156, St. Clair, IL

Built 1901 Load: 24.3 t ADT: 25

NORTH THIRD STREET

Good

Over: RICHLAND CREEK

4 BLOCKS NW SQUARE, St. Clair, IL

Built 1948 Load: 24.3 t ADT: 875

W MAIN ST/ FAU 918

Good

Over: RICHLAND CREEK

0.50 W ILL 159, St. Clair, IL

Built 1948 Load: 24.3 t ADT: 6,100

N 6th St. - FAU 93

Good

Over: Drains to Silver Crk

0.6 Miles N IL 177, St. Clair, IL

Built 1962 Load: 25.6 t ADT: 1,200

FRANK SCOTT PKWY

Good

Over: TRIB RICHLAND CK

0.5 MI W CH 89, St. Clair, IL

Built 2001 Load: 25.6 t ADT: 16,200

US 50

Good

Over: LITTLE SILVER CREEK

AT E EDGE LEBANON, St. Clair, IL

Built 1965 Load: 28.5 t ADT: 9,450

MUNICIPAL ST. 6060

Good

Over: BR LITTLE SILVER CK

0.2 MI E CH50 SUMFLD, St. Clair, IL

Built 1981 Load: 29.2 t ADT: 150

Read our methodology — how this data is sourced, computed, and verified.

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial