County profile · official public datasets

Massac County, IL

132 public highway bridges tracked in the FHWA National Bridge Inventory: 43.9% rated Good, 47.7% Fair, 8.3% Poor.

132
Public bridges
43.9%
Good condition
8.3%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Massac County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

58th
of 102 on Poor share
8.3%
Poor-condition share
132
public highway bridges
1980
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Massac County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Massac County ranks #58 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.3%). Massac County, Illinois contains 132 public highway bridges. Roughly 43.9% are rated “Good,” 47.7% “Fair,” and 8.3% “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.

Total bridges

132

Public highway bridges in Massac County

Good condition

43.9%

58 of 132 rated 7-9

Fair condition

47.7%

63 of 132 rated 5-6

Poor condition

8.3%

11 of 132 rated 4 or below

In-state Poor-share rank

#58 of 102

Among Illinois counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 132 NBI-tracked bridges by lowest applicable component rating.

Good
43.9% (58)
Fair
47.7% (63)
Poor
8.3% (11)

Massac County's Poor-condition bridges carry 12,700 vehicle crossings a day

That is 3.1% of the county's reported daily bridge traffic on 8.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,155 crossings a day against 3,707 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 131 of 132 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

34.8% of Massac County's bridges have passed the 50-year mark

46 of the 132 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 43.9% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 83.5% of the county's Poor-condition bridge traffic

I 24 WB over BEAR CREEK, built 1971, carries 10,600 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 11-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 12,700 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Massac County's bridges were built

132 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 35 of the county's bridges still in the inventory were built, which is 26.5% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1980) matches the Illinois average (1979).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Massac County compares with Illinois's closest counties by inventory size

The 5 Illinois counties nearest Massac County in number of bridges, with their condition splits. Its 8.3% Poor share is the 4th-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1984 is in line with the group.

Showing the 5 closest of 101 Illinois counties eligible for comparison.

Bridge inventory size and condition shares for Massac County and the 5 Illinois counties closest to it in inventory size
County Bridges Poor
Henderson County 142 12%
Perry County 136 7.4%
Kendall County 132 12.1%
Monroe County 132 6.8%
Massac County (this page) 132 8.3%
Johnson County 118 2.5%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Massac County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Massac County, both outside Illinois so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside IL (132 bridges here).

Similar average build year

Nearest mean year-built outside IL (1980 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 132 Good 58 Fair 63 Poor 11

All bridges (132)

US 45

Fair

Over: TUCKER DITCH

3.5 MI S JOHNSON CO, Massac, IL

Built 1951 Load: 41.8 t ADT: 1,950

I-24 RAMP 259

Fair

Over: NEW COLUMBIA DITCH

NEW COLUMBIA INTERCH, Massac, IL

Built 1978 Load: 41.8 t ADT: 250

TR 133

Fair

Over: UNNAMED STREAM

0.1 MI E OF TR 142A, Massac, IL

Built 1990 Load: 42.1 t ADT: 275

MERMET ROAD

Fair

Over: MAIN DITCH

0.74 E OF US 45, Massac, IL

Built 1988 Load: 42.8 t ADT: 200

STRAWBERRY ROAD

Fair

Over: SEVENMILE CREEK

1 MI S US45, Massac, IL

Built 2007 Load: 44.4 t ADT: 175

ORCHARD ROAD

Fair

Over: UN-NAMED CREEK

1.41MI S OF CH 8, Massac, IL

Built 2008 Load: 45.4 t ADT: 25

US 45-FAP 889

Fair

Over: STREAM

0.8 MI W I-24, Massac, IL

Built 1999 Load: 46.0 t ADT: 12,800

ILL 145

Fair

Over: MASSAC CREEK

4 MI S POPE CO LINE, Massac, IL

Built 1932 Load: 49.9 t ADT: 2,050

US 45-FAS 960

Fair

Over: MAIN DITCH

1 MI S JOHNSON CO, Massac, IL

Built 2001 Load: 49.9 t ADT: 1,250

I-24 RAMP 260

Fair

Over: NEW COLUMBIA DITCH

NEW COLUMBIA INTERCH, Massac, IL

Built 1978 Load: 52.8 t ADT: 300

COUNTY HIGHWAY 5

Fair

Over: B.N.R.R.

2.5 MILE EAST JOPPA, Massac, IL

Built 1975 Load: 52.8 t ADT: 2,200

TR 2

Fair

Over: CREEK

0.5 MI N OF TR 4, Massac, IL

Built 1966 Load: 69.7 t ADT: 10

I 24

Fair

Over: GEORGES CREEK

2 MI S OF JOHNSON CO, Massac, IL

Built 1971 Load: 77.1 t ADT: 21,200

COUNTRY CLUB RD

Good

Over: ICRR

0.5 MI W CH 1, Massac, IL

Built 2023 ADT: 1,700

TR 149

Good

Over: STREAM W OF POPE CO

1 MI W COUNTY LINE, Massac, IL

Built 1900 Load: 24.3 t ADT: 50

I 24 EB

Good

Over: ABANDON RR BED

1.3 MI S OF US 45, Massac, IL

Built 1970 Load: 31.8 t ADT: 15,600

I 24 WB

Good

Over: ABANDON RR BED

1.3 MI S OF US 45, Massac, IL

Built 1970 Load: 31.8 t ADT: 15,600

OLD MARION RD

Good

Over: MUD CK

0.5 MI NE METROPOLIS, Massac, IL

Built 1977 Load: 32.4 t ADT: 1,600

AUGUST KRUEGER ROA

Good

Over: SEVENMILE CREEK

4.3 MI E ILL 145, Massac, IL

Built 1978 Load: 32.4 t ADT: 10

TR 59

Good

Over: SEN BECK DITCH

3 MI EAST MERMET LK, Massac, IL

Built 1979 Load: 32.4 t ADT: 175

TR 9

Good

Over: GEORGES CREEK

2 MI NE NEW COLUMBIA, Massac, IL

Built 1980 Load: 32.4 t ADT: 25

TR-58

Good

Over: SEN BECK DITCH

3 MILE SE MERMET, Massac, IL

Built 1980 Load: 32.4 t ADT: 150

CAANAN CH RD-TR 65

Good

Over: TRIB TO MASSAC CREEK

1.5 MI W OF IL 145, Massac, IL

Built 1981 Load: 32.4 t ADT: 175

COUNTRY CLUB ROAD

Good

Over: WEAVER CREEK

1.5 MI N METROPOLIS, Massac, IL

Built 1981 Load: 32.4 t ADT: 1,700

OLD MARION RD

Good

Over: WEAVER CREEK

1.2 MI N METROPOLIS, Massac, IL

Built 1982 Load: 32.4 t ADT: 1,800

UNIONVILLE ROAD

Good

Over: CRENSHAW CREEK TRIB

2.2 MI E US 45, Massac, IL

Built 1982 Load: 32.4 t ADT: 1,450

TR 121

Good

Over: FOUR MILE CREEK

1 MILE E OF IL 145, Massac, IL

Built 1983 Load: 32.4 t ADT: 125

TR 34A

Good

Over: PATERSON BRANCH

0.23 MI N IL 169, Massac, IL

Built 1993 Load: 32.4 t ADT: 25

SEILBECK RD

Good

Over: ICRR

.2 M W CH1, Massac, IL

Built 2012 Load: 32.4 t ADT: 50

SCHNEEMAN ROAD

Good

Over: Q DITCH

2.5 MI S OF MERMET, Massac, IL

Built 2011 Load: 32.4 t ADT: 100

POWERS CHURCH ROAD

Good

Over: SEVENMILE CREEK

4.1 MI N BROOKPORT, Massac, IL

Built 2016 Load: 32.4 t ADT: 100

FAU 9772

Good

Over: MUD CREEK

N METROPOLIS ST, Massac, IL

Built 1996 Load: 32.4 t ADT: 1,300

NORTH AVENUE

Good

Over: WEAVER CREEK

2.3 MI N US45, Massac, IL

Built 1971 Load: 33.7 t ADT: 2,150

I-24 EB

Good

Over: BEAR CREEK

4 MI S JOHNSON CO, Massac, IL

Built 2023 Load: 34.7 t ADT: 10,600

TR 3

Good

Over: CLIFTY CREEK

2.76 MI E US 45, Massac, IL

Built 1993 Load: 35.0 t ADT: 50

TR-142 Mt.Sterling

Good

Over: Trib. to Crenshaw Cr

4 MI E OF BROOKPORT, Massac, IL

Built 2019 Load: 35.3 t ADT: 225

NEW COLUMBIA ROAD

Good

Over: GURLEY DITCH

3 MI N ROUND KNOB, Massac, IL

Built 2014 Load: 35.6 t ADT: 650

FAS 956

Good

Over: DRY RIDGE DITCH

3.6 MI E US 45, Massac, IL

Built 1989 Load: 36.0 t ADT: 225

JONESBORO ROAD

Good

Over: TRIB Q DITCH EAST BR

1050N-0600E, Massac, IL

Built 1991 Load: 36.3 t ADT: 1,200

TR 123

Good

Over: UNNAMED CREEK

1.25 MI E FAS 929, Massac, IL

Built 1992 Load: 36.3 t ADT: 800

JONESBORO ROAD

Good

Over: TRIB Q DITCH WEST BR

1050N-0600E, Massac, IL

Built 1991 Load: 36.6 t ADT: 1,200

TR 97

Good

Over: SEVENMILE CREEK

0.25 MI E TR 122, Massac, IL

Built 1993 Load: 36.6 t ADT: 175

I 24

Good

Over: OR 4 FT MASSAC ST PK

1.4 MI S OF US 45, Massac, IL

Built 1970 Load: 37.3 t ADT: 31,200

I-24 EB

Good

Over: COUNTRY CLUB ROAD

2 MI N OF US 45, Massac, IL

Built 2019 Load: 37.6 t ADT: 10,600

I-24 WB

Good

Over: COUNTRY CLUB

2 MI N OF US 45, Massac, IL

Built 2020 Load: 37.6 t ADT: 10,600

TR 65

Good

Over: TRIB TO MASSAC CR

1/4 MI W OF TR 86, Massac, IL

Built 1996 Load: 37.9 t ADT: 50

TR 142A

Good

Over: STREAM

2.28 MI W CH 6, Massac, IL

Built 1999 Load: 38.2 t ADT: 225

I 24 EB

Good

Over: FUTURE PARK ROAD

1 MI S OF US 45, Massac, IL

Built 1970 Load: 38.6 t ADT: 15,600

I 24 WB

Good

Over: FUTURE PARK ROAD

1 MI S OF US 45, Massac, IL

Built 1970 Load: 38.6 t ADT: 15,600

TR 37

Good

Over: BEAR CREEK

1 MI W OF ILL 145, Massac, IL

Built 1986 Load: 38.6 t ADT: 25

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

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges 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. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.