Williamson County, IL

204 public highway bridges

Williamson County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Williamson County, Illinois contains 204 public highway bridges. Roughly 61.8% are rated “Good,” 24% “Fair,” and 1.5% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

204
Total Bridges
61.8%
Good
24%
Fair
1.5%
Poor Condition

Condition Distribution

Good
61.8% (126)
Fair
24% (49)
Poor
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 public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.