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)

BUSS BRANCH RD

Good

Over: GERHARDT CREEK

2.0MI SW PADERBORN, St. Clair, IL

Built 2000 Load: 32.4 t ADT: 375

ETLING ROAD

Good

Over: W. FORK RICHLAND CT.

1MI EAST OF CH 9, St. Clair, IL

Built 2001 Load: 32.4 t ADT: 350

TR 218

Good

Over: BRANCH SILVER CREEK

1 MI S IL. 15, St. Clair, IL

Built 2002 Load: 32.4 t ADT: 150

WASH CO LINE/TR 2

Good

Over: TRIB MUD CREEK

.5MI S LEHR RD, St. Clair, IL

Built 2002 Load: 32.4 t ADT: 300

SAEGER RD/TR 135

Good

Over: PRAIRIE DUPONT CREEK

0.9 MI NW OF RT 158, St. Clair, IL

Built 2004 Load: 32.4 t ADT: 350

OAK GROVE SCH. TR

Good

Over: BR LITTLE SILVER CR.

1 MI W CH 50, St. Clair, IL

Built 2003 Load: 32.4 t ADT: 325

PRESSS RD/TR 197

Good

Over: KINNEY BRANCH

2.5 MI E IL 159, St. Clair, IL

Built 2008 Load: 32.4 t ADT: 425

GRODEON RD/TR 151

Good

Over: HOG RIVER

1 MI W IL 4, St. Clair, IL

Built 2009 Load: 32.4 t ADT: 225

SHILOH STATION RD

Good

Over: BRANCH LOOP CREEK

1 MI N IL RTE 161, St. Clair, IL

Built 2006 Load: 32.4 t ADT: 700

BLACK QUARTER RD

Good

Over: DRY LANE SLOUGH

.5MI NE IL 13, St. Clair, IL

Built 2010 Load: 32.4 t ADT: 50

EMRALD MOUND TR 26

Good

Over: E BR LITTLE SILVER

1 MI N US 50, St. Clair, IL

Built 2009 Load: 32.4 t ADT: 100

PARK RD/TR 102

Good

Over: DOUGLAS CREEK

0.4 MI N SCHMIDT LN, St. Clair, IL

Built 2011 Load: 32.4 t ADT: 200

Press Rd/TR 197

Good

Over: Douglas Creek

1 MI E IL Rt 159, St. Clair, IL

Built 2012 Load: 32.4 t ADT: 375

TR 285 - Schmoll R

Good

Over: Branch of Doza Creek

1 Mi E of Baldwin Rd, St. Clair, IL

Built 2014 Load: 32.4 t ADT: 75

TR 223 Pensoneau R

Good

Over: Trib Little Mud Cr

0.2 Mi E of IL Rte 4, St. Clair, IL

Built 2015 Load: 32.4 t ADT: 150

STATE STREET

Good

Over: ALTON/SOUTH RR

.15 E OF 40TH ST, St. Clair, IL

Built 1999 Load: 32.4 t ADT: 5,400

LEBANON AVE FAU 92

Good

Over: METRO LINK

0.5 NE OF IL 159, St. Clair, IL

Built 1999 Load: 32.4 t ADT: 6,850

CLEVELAND AVENUE

Good

Over: RICHLAND CREEK

BELLEVILLE, St. Clair, IL

Built 2010 Load: 32.4 t ADT: 675

MS-7241 BicentPkDr

Good

Over: Creek

0.5 Mi S IL 13, St. Clair, IL

Built 2013 Load: 32.4 t ADT: 225

MS-6302 Dutch Hw R

Good

Over: Creek

0.1 Mi S Lebanon Rd, St. Clair, IL

Built 2016 Load: 32.4 t ADT: 475

North Long Street

Good

Over: Little Canteen Creek

E Sec 7 T2N R8W, St. Clair, IL

Built 2016 Load: 32.4 t ADT: 700

N. SMILEY ST

Good

Over: ENGLE CREEK

1.7MI N OLD US 50, St. Clair, IL

Built 1995 Load: 32.4 t ADT: 1,100

DEER CREEK ROAD

Good

Over: TRIB TO ENGLE CREEK

.4MI W 7 HILLS RD, St. Clair, IL

Built 2006 Load: 32.4 t ADT: 1,550

FAU 9331 VENITA DR

Good

Over: CSX RAILROAD

.16 MI N FAU 9166, St. Clair, IL

Built 2015 Load: 32.4 t ADT: 6,650

PLSNT RDG RD/FAU91

Good

Over: CREEK

1.2 MI N OF BUNKUM R, St. Clair, IL

Built 2009 Load: 32.4 t ADT: 550

North 10th Street

Good

Over: Drainage Ditch

Mascoutah, St. Clair, IL

Built 2015 Load: 32.4 t ADT: 725

PARK ACCESS ROAD

Good

Over: WHISPERING WILLOW LK

FRANK HOLTEN ST. PK., St. Clair, IL

Built 2004 Load: 32.4 t ADT: 350

WARD DRIVE

Good

Over: ASH CREEK

260' NORTH OF PAUL REVERE, St. Clair, IL

Built 1990 Load: 32.7 t ADT: 12,500

PRYOR DRIVE

Good

Over: TRIBUTARY SILVER CREEK

50' NORTH OF AIR GUARD WA, St. Clair, IL

Built 2010 Load: 32.7 t ADT: 2,500

IL 13

Good

Over: ICRR

2.5 S of Freeburg, St. Clair, IL

Built 1997 Load: 33.0 t ADT: 5,800

IL 3 NB

Good

Over: 2 future TRRA tracks

0.5mi SW I-70, St. Clair, IL

Built 2016 Load: 33.0 t ADT: 2,350

IL 3 SB

Good

Over: 2 future TRRA tracks

0.5 mi SW of I-70, St. Clair, IL

Built 2016 Load: 33.0 t ADT: 2,350

ILL 177

Good

Over: TRIB RAYHILLS SLOUGH

4.5M E OF IL 4, St. Clair, IL

Built 1994 Load: 33.0 t ADT: 2,000

ILL 177

Good

Over: ASH CREEK

0.7 MI E ILL 158, St. Clair, IL

Built 1991 Load: 33.4 t ADT: 7,150

ILL 177

Good

Over: E Trib Reinhardt SL

1.8M E JCT IL 4, St. Clair, IL

Built 1994 Load: 33.4 t ADT: 2,450

IL 159

Good

Over: Trib to Richland Crk

3.2 MI N SMITHON, St. Clair, IL

Built 2001 Load: 33.4 t ADT: 8,100

FAU 9175

Good

Over: ROCK SPRING BRANCH

0.5M N US 50, St. Clair, IL

Built 1972 Load: 33.4 t ADT: 11,400

STATE STREET RD

Good

Over: CREEK

BELV S 1.5M IL 15, St. Clair, IL

Built 1999 Load: 33.4 t ADT: 1,700

US 50

Good

Over: SILVER CREEK

1.5 M W ILL 4, St. Clair, IL

Built 1939 Load: 33.7 t ADT: 16,000

I-64WB, Ramp to 18

Good

Over: NSRR

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

Built 1974 Load: 34.0 t ADT: 37,900

ILL 161

Good

Over: RICHLAND CREEK

.5 MI E ILL 159, St. Clair, IL

Built 1987 Load: 34.0 t ADT: 19,600

FAI 70A

Good

Over: MISSISSIPPI RIVER

RIVER CROSSING MAIN, St. Clair, IL

Built 2014 Load: 34.8 t ADT: 44,300

IL 13

Good

Over: TRIB TO KASKASKIA RV

2.2M N NEW ATHENS, St. Clair, IL

Built 1996 Load: 35.3 t ADT: 5,450

OLD LINCOLN TRAIL

Good

Over: HOLLOW CREEK

.1 MI E ILL 161, St. Clair, IL

Built 1977 Load: 36.0 t ADT: 2,600

IL 15 - FA 817

Good

Over: TRIB OF L MUD CREEK

0.5 NW OF ST. LIBORY, St. Clair, IL

Built 1990 Load: 36.0 t ADT: 3,450

Scott Drive NB

Good

Over: ASH CREEK

0.4 M N JCT ILL 161, St. Clair, IL

Built 1952 Load: 36.3 t ADT: 3,700

Scott Drive SB

Good

Over: ASH CREEK

0.4 M N JCT ILL 161, St. Clair, IL

Built 1952 Load: 36.3 t ADT: 3,700

FAI 64 WB

Good

Over: Abandoned Rdwy C

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

Built 1968 Load: 36.6 t ADT: 37,900

IL 4

Good

Over: Trib to Silver Creek

1/2 mi south of I-64, St. Clair, IL

Built 1995 Load: 36.6 t ADT: 7,800

FAI 64 EB

Good

Over: Abandoned Roadway C

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

Built 1974 Load: 36.9 t ADT: 37,900

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