Mason County, IL

85 public highway bridges

Mason County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Mason County, Illinois contains 85 public highway bridges. Roughly 34.1% are rated “Good,” 58.8% “Fair,” and 4.7% “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.

85

Total Bridges

34.1%

Good

58.8%

Fair

4.7%

Poor Condition

Condition Distribution

Good

34.1% (29)

Fair

58.8% (50)

Poor

4.7% (4)

All Bridges (85)

Sort:

PEDESTRIAN WALKWAY

Over: MAIN STREET

HAVANA, Mason, IL

Built 1996 ADT: 25

C&NW RR

Over: TR 125

2 M NE MASON CITY, Mason, IL

Built 1931 ADT: 25

TR 105

Over: WHITE OAK CREEK

3.5 MI S HAVANA, Mason, IL

Built 1959 Load: 17.5 t ADT: 50

TR 268

Over: ROGERS DITCH

3 MI SE MASON CITY, Mason, IL

Built 1900 Load: 21.1 t ADT: 50

TR 83

Over: HARDIN DITCH

3 MI NNW EASTON, Mason, IL

Built 1976 Load: 22.4 t ADT: 50

FAS 567

Over: C & IM RR CO

N CITY LIMITS HAVANA, Mason, IL

Built 1949 Load: 22.7 t ADT: 2,150

TR 150

Over: MASON TAZEWELL DITCH

0.5 MI SW FOREST CTY, Mason, IL

Built 1910 Load: 23.3 t ADT: 50

TR 194

Over: SLEEPY HOLLOW DITCH

4.5 MI SW MASON CITY, Mason, IL

Built 1972 Load: 23.3 t ADT: 25

TR 95

Over: HARDIN DITCH

2 MI N OF EASTON, Mason, IL

Built 1976 Load: 24.3 t ADT: 50

TR 254

Over: ASH GROVE DITCH

3.5 MI NW SAN JOSE, Mason, IL

Built 1976 Load: 24.3 t ADT: 25

TR 276

Over: ROGERS DITCH

3.5 MI SE MASON CITY, Mason, IL

Built 1970 Load: 24.3 t ADT: 75

FAS 461 CO HWY 4

Over: QUIVER DITCH

FOREST CITY CL, Mason, IL

Built 1948 Load: 26.2 t ADT: 500

TR 156

Over: FURRER DITCH

1.5 MI NE EASTON, Mason, IL

Built 1972 Load: 26.2 t ADT: 75

CH 10

Over: ASH GROVE DITCH

4.5 MI NW OF SAN JOS, Mason, IL

Built 1976 Load: 27.2 t ADT: 1,650

TR 82

Over: MASON-TAZEWELL DITCH

1 MI W TOPEKA, Mason, IL

Built 1970 Load: 27.2 t ADT: 75

TR 242

Over: ALLENS GROVE DITCH

0.48 mi S US 136, Mason, IL

Built 1972 Load: 27.2 t ADT: 50

FAS 572 CO HWY 5

Over: CRANE CREEK

3 MI E OF KILBOURNE, Mason, IL

Built 1956 Load: 27.5 t ADT: 250

TR 171

Over: SW MASON CITY DITCH

1.5M SW MASON CITY, Mason, IL

Built 1983 Load: 27.9 t ADT: 175

TR 109

Over: CRANE CREEK

1 MI NW EASTON, Mason, IL

Built 1950 Load: 31.8 t ADT: 125

FAS 572 (CH 5)

Over: DUFF ARMSTRONG DITCH

1.5 M SW EASTON, Mason, IL

Built 2012 Load: 32.4 t ADT: 200

TR 43

Over: QUIVER CR

2.5 MI W TOPEKA, Mason, IL

Built 1984 Load: 32.4 t ADT: 25

TR43

Over: QUIVER CREEK

2.5MI W TOPEKA, Mason, IL

Built 1985 Load: 32.4 t ADT: 25

TR 112

Over: MASON TAZEWELL DITCH

1.0 MI E OF TOPEKA, Mason, IL

Built 1987 Load: 32.4 t ADT: 25

TR 27

Over: MAIN DITCH

1 MI SE FOREST CITY, Mason, IL

Built 1983 Load: 32.4 t ADT: 50

TR 206A

Over: MAIN DITCH

3 MI SE FOREST CITY, Mason, IL

Built 1956 Load: 32.4 t ADT: 225

TR 234

Over: ALLENS GROVE DITCH

7 MI WEST SAN JOSE, Mason, IL

Built 1983 Load: 32.4 t ADT: 50

TR 158

Over: FURRER DITCH

2 MI NE EASTON, Mason, IL

Built 1983 Load: 32.4 t ADT: 25

TR 165

Over: JORDAN CREEK

3MI NW KILBOURNE, Mason, IL

Built 1988 Load: 32.4 t ADT: 50

TR 129

Over: DUFF ARMSTRONG DITCH

2.5 MI. SW EASTON, Mason, IL

Built 1988 Load: 32.4 t ADT: 25

TR 129

Over: DUFF ARMSTRONG DITCH

2 MI SSW EASTON, Mason, IL

Built 1988 Load: 32.4 t ADT: 75

TR 165

Over: CRANE CR

3.5 MI NE KILBORNE, Mason, IL

Built 1976 Load: 32.4 t ADT: 50

TR 100 (2400E)

Over: Crane Creek

0.60 mi S TR 129, Mason, IL

Built 2015 Load: 32.4 t ADT: 25

TR 153

Over: LOCAL DITCH

3M S EASTON, Mason, IL

Built 1996 Load: 32.4 t ADT: 25

TR 125

Over: BECKER DITCH

3 MI ENE MASON CITY, Mason, IL

Built 1982 Load: 32.4 t ADT: 25

TR 171

Over: PRAIRIE CK

4.5 MI ESEMASON CTY, Mason, IL

Built 1978 Load: 32.4 t ADT: 175

TR 276

Over: SUGAR CREEK

5 MI SE OFMASON CITY, Mason, IL

Built 1980 Load: 32.4 t ADT: 50

TR 189

Over: CENW RR

3.5 MI ESE MASON CIT, Mason, IL

Built 1984 Load: 32.4 t ADT: 50

TR 193A

Over: SALT CREEK TRIBUTARY

5 MI SW MASON CITY, Mason, IL

Built 2010 Load: 32.4 t ADT: 75

FAP 614 (IL 78)

Over: DITCH

1.50 M S US 136, Mason, IL

Built 1978 Load: 32.4 t ADT: 2,250

IL 10

Over: DITCH

1.50M S US 136, Mason, IL

Built 1970 Load: 32.4 t ADT: 550

IL 10

Over: DITCH

.50M S US 136, Mason, IL

Built 1970 Load: 32.4 t ADT: 550

US 136

Over: DITCH

1.08 E IL 10, Mason, IL

Built 1966 Load: 32.7 t ADT: 1,700

IL 10

Over: CRANE CREEK

1.5 MI N EASTON, Mason, IL

Built 1925 Load: 33.4 t ADT: 550

ILL 10

Over: DITCH

1.0 MI W JCT I29/10, Mason, IL

Built 1927 Load: 34.3 t ADT: 1,200

IL 29

Over: SALT CREEK

MASON MENARD CO LINE, Mason, IL

Built 2002 Load: 34.7 t ADT: 2,000

US 136

Over: ALLENS GROVE DITCH

2 MI W JCT ILL 29, Mason, IL

Built 1962 Load: 35.0 t ADT: 1,150

ILL 78

Over: WHITE OAK CREEK

2.8MI S JCT 78/136, Mason, IL

Built 1931 Load: 36.6 t ADT: 1,750

TR 131 A

Over: PRAIRIE CK

4.5 MI E MASON CTY, Mason, IL

Built 1979 Load: 36.6 t ADT: 50

OLD US 136

Over: COUNTY DITCH

S US136, 1.2M E IL10, Mason, IL

Built 1928 Load: 37.6 t ADT: 25

TR 218

Over: MAIN DITCH

4.5 MI SE FOREST CTY, Mason, IL

Built 1980 Load: 39.2 t ADT: 50

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

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