Williamson County, IL

204 public highway bridges

Williamson County Bridge Snapshot

Williamson County, Illinois contains 204 public highway bridges in the FHWA National Bridge Inventory. Roughly 61.8% are rated “Good,” 24% “Fair,” 1.5% “Poor,” and 1.5% 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.

204
Total Bridges
61.8%
Good
1.5%
Poor
1.5%
Structurally Deficient

Condition Distribution

Good
61.8% (126)
Fair
24% (49)
Poor
1.5% (3)
SD
1.5% (3)

All Bridges (204)

OLD CREAL SPRINGS

Good

Over: CRAB ORCHARD CREEK

SE SIDE OF MARION, Williamson, IL

Built 1999 Load: 32.4 t ADT: 1,900

ALLEY

Good

Over: WEST END CREEK

MARION, Williamson, IL

Built 1997 Load: 32.4 t ADT: 10

CS 1104-AUGUSTA DR

Good

Over: UNNAMED STREAM

KOKOPELLI SUBDVSION, Williamson, IL

Built 1996 Load: 32.4 t ADT: 125

FAU 9588-HERRIN ST

Good

Over: 17TH ST DITCH

0.31 MI W OF IL 148, Williamson, IL

Built 1999 Load: 32.4 t ADT: 7,000

FUTURE STREET

Good

Over: DRAINAGE DITCH

FUTURE S OF COLLEGE, Williamson, IL

Built 2007 Load: 32.4 t ADT: 375

GARDEN AVE

Good

Over: DITCH

0.65 MI E OF SKYLINE, Williamson, IL

Built 2015 Load: 32.4 t ADT: 1,900

FAS 1887

Good

Over: GRASSY CREEK

1 MI NW OF STONEFORT, Williamson, IL

Built 1990 Load: 32.7 t ADT: 300

WEST GATE ROAD

Good

Over: GRASSY CREEK

4.5 MILES SOUTH OF HQ, Williamson, IL

Built 2006 Load: 33.6 t ADT: 2

IL 37

Good

Over: TRIB TO LIMB BRANCH

1 MI S OF MARION, Williamson, IL

Built 2018 Load: 33.7 t ADT: 5,500

FAS 909 (UNMARKED)

Good

Over: DITCH

0.27 MI W OF MARION, Williamson, IL

Built 1993 Load: 34.0 t ADT: 5,700

CH 13-S.MARKET ST

Good

Over: MULE CREEK

AT SCL OF MARION, Williamson, IL

Built 1986 Load: 35.0 t ADT: 3,550

ILL 13

Good

Over: STREAM

ECL OF MARION, Williamson, IL

Built 1962 Load: 35.6 t ADT: 14,400

FAS 1900

Good

Over: GRASSY CREEK

7 MI S CARTERVILLE, Williamson, IL

Built 1942 Load: 35.6 t ADT: 1,950

CH 13-S MARKET ST

Good

Over: TRIB CRAB ORCHARD CR

SCL OF MARION, Williamson, IL

Built 1986 Load: 36.0 t ADT: 3,550

OGDEN ROAD

Good

Over: LITTLE WOLF CREEK

OGDEN RD WEST OF HWY 148, Williamson, IL

Built 1998 Load: 36.3 t ADT: 35

TR 548

Good

Over: POND CREEK

5 MILES N PITTSBURG, Williamson, IL

Built 1985 Load: 36.3 t ADT: 325

FAS 1887-CH 12

Good

Over: S FORK SALINE R OVFL

3.5 MI S CRABORCHARD, Williamson, IL

Built 1988 Load: 36.3 t ADT: 1,150

FAS1887-SARAVILLE

Good

Over: S FORK SALINE RIVER

4 MI S CRAB ORCHARD, Williamson, IL

Built 1997 Load: 36.3 t ADT: 1,150

CH 5

Good

Over: SOUTH FORKSALINE

6 MI SOUTHILL RTE 13, Williamson, IL

Built 1983 Load: 36.9 t ADT: 50

TR 29-DEAN ROAD

Good

Over: POND CREEK TRIB

4 MI NE PITTSBURG, Williamson, IL

Built 1998 Load: 38.6 t ADT: 250

FAS 1887 (UNMARKED

Good

Over: STREAM E CRABORCHARD

E OF CRABORCHARD, Williamson, IL

Built 2005 Load: 38.9 t ADT: 550

TWP ROAD 601

Good

Over: GRASSY CREEK

4 MI E CREAL SPRINGS, Williamson, IL

Built 1986 Load: 38.9 t ADT: 175

TR 556

Good

Over: LAKE CREEK

1.5 MI NW PITTSBURG, Williamson, IL

Built 1987 Load: 38.9 t ADT: 75

ILL 166

Good

Over: S FORK SALINE RIVER

3.6 MI S OF ILL 13, Williamson, IL

Built 1991 Load: 39.2 t ADT: 2,100

CS 1108-CHAMPIONS

Good

Over: UNNAMED STREAM

KOKOPELLI SUBDVSION, Williamson, IL

Built 1996 Load: 39.2 t ADT: 600

CH 1

Good

Over: LAKE CREEK

.5 MI SW JOHNSTON CY, Williamson, IL

Built 1979 Load: 39.5 t ADT: 600

SBI 13B (UNMARKED)

Good

Over: BR.L.CRAB ORCHARD CR

.09 mi w Saraville R, Williamson, IL

Built 2012 Load: 40.2 t ADT: 1,600

TR 9

Good

Over: STREAM

4 MI NE OF CORINTH, Williamson, IL

Built 1991 Load: 40.2 t ADT: 100

LAKE OF EGYPT RD

Good

Over: LAKE EGYPT SPILLWAY

6 MI S MARION, Williamson, IL

Built 1962 Load: 40.5 t ADT: 2,800

FAS 1887-CH 12

Good

Over: SUGAR CREEK

7 MI S CRAB ORCHARD, Williamson, IL

Built 1995 Load: 41.1 t ADT: 500

FAS 1900

Good

Over: LITTLE WOLF CREEK

4 MI NW PULLEYS MILL, Williamson, IL

Built 1942 Load: 41.5 t ADT: 2,100

ILL 37

Good

Over: BNSF RR

1.7 MI N OF ILL 148, Williamson, IL

Built 2009 Load: 41.8 t ADT: 3,350

FAS 908

Good

Over: LITTLE HURRICANE CR

0.3 MI E OF COLP, Williamson, IL

Built 2001 Load: 42.1 t ADT: 5,700

SKYHAWK RD

Good

Over: UNNAMED CREEK

8 MI SE CARBONDALE, Williamson, IL

Built 2013 Load: 42.1 t ADT: 650

HERRIN ROAD

Good

Over: TRIB TO POND CREEK

0.75M E HERRIN, Williamson, IL

Built 2016 Load: 42.8 t ADT: 6,200

WB IL 13

Good

Over: BNSF RR

MARION, Williamson, IL

Built 2015 Load: 43.1 t ADT: 26,300

FAS 2904

Good

Over: LITTLE SALINE CREEK

2 MI NE PULLEYS MILL, Williamson, IL

Built 1983 Load: 43.1 t ADT: 3,850

GERMAN CHURCH RD

Good

Over: CREEK

1 MI NE JOHNSTON CIT, Williamson, IL

Built 2019 Load: 43.7 t ADT: 225

NEW IL 13 (WB)

Good

Over: BANKSTON FORK

1.7 MI W SALINE CO L, Williamson, IL

Built 1990 Load: 44.1 t ADT: 9,000

PLEASANT VALLEY RD

Good

Over: GRASSY CREEK

1 MI W OF STONEFORT, Williamson, IL

Built 2014 Load: 44.1 t ADT: 175

HERRIN ROAD

Good

Over: TRIB TO POND CREEK

1.0M E HERRIN, Williamson, IL

Built 2016 Load: 46.0 t ADT: 5,700

IL 148

Good

Over: WOLF CREEK

I MI N OF I-57, Williamson, IL

Built 2021 Load: 47.6 t ADT: 5,600

FAS 1901

Good

Over: LITTLE GRASSY CREEK

4 MI S OF CARTERVILL, Williamson, IL

Built 1976 Load: 50.9 t ADT: 850

A-3 ROAD

Good

Over: PIGEON CREEK

0.5 MI NW OF HDQRTRS, Williamson, IL

Built 1990 Load: 51.7 t ADT: 400

FAS 2887-IL 37

Good

Over: LAKE CREEK

0.4 M S JHNSTON CITY, Williamson, IL

Built 2000 Load: 52.8 t ADT: 8,000

IL 148-FAP 726

Good

Over: WOLF CREEK

1.5 MI N FAS 1900, Williamson, IL

Built 2001 Load: 54.8 t ADT: 6,150

LIMB BRANCH LANE

Good

Over: LIMB BRANCH CREEK

1.5 MI S MARION, Williamson, IL

Built 2021 Load: 54.8 t ADT: 100

LIMB BRANCH LA

Good

Over: BNSF RR

0.5 MI. W. ILL. 37, Williamson, IL

Built 2019 Load: 60.6 t ADT: 100

FAS 908 (CH 11)

Good

Over: TRIB TO HURRICANE CR

0.5 MI E OF COLP, Williamson, IL

Built 2001 Load: 63.8 t ADT: 5,700

ILL 37

Good

Over: LITTLE SALINE CREEK

NEAR PULLEYS MILL, Williamson, IL

Built 2009 Load: 77.8 t ADT: 4,600

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