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)

TR 82

Good

Over: TRIB-GURLEY DITCH

0.33 MI N TR 45, Massac, IL

Built 2002 Load: 38.6 t ADT: 25

US 45

Good

Over: SEVEN MILE CREEK

2.17 MI E OF ILL 145, Massac, IL

Built 1995 Load: 39.5 t ADT: 4,900

TR 19

Good

Over: BEAR CREEK

.1 MI WEST ILL 145, Massac, IL

Built 1984 Load: 39.5 t

BEN BREAMER ROAD

Good

Over: NEW COLUMBIA DITCH

3.2MI S NEW COLUMBIA, Massac, IL

Built 1987 Load: 39.5 t ADT: 100

UNIONVILLE ROAD

Good

Over: CRENSHAW CREEK

3.75 MI E US45, Massac, IL

Built 1956 Load: 40.2 t ADT: 1,150

US 45-FAP 889

Good

Over: MASSAC CREEK

1.5 MI W I-24, Massac, IL

Built 1999 Load: 40.8 t ADT: 12,800

TR 133

Good

Over: DAVIS BAYOU

32-T15S-R6E, Massac, IL

Built 1995 Load: 40.8 t ADT: 550

TR 47-BENTON RD

Good

Over: TRIB OF GURLEY DITCH

0.1 MI E TR 82, Massac, IL

Built 1996 Load: 40.8 t ADT: 10

NEW COLUMBIA ROAD

Good

Over: BEAR CREEK DITCH

3.1 MI N ROUND KNOB, Massac, IL

Built 2014 Load: 40.8 t ADT: 650

TR 133

Good

Over: CRENSHAW CREEK

2 MI N OF UNIONVILLE, Massac, IL

Built 1991 Load: 41.5 t ADT: 400

I 24 WB

Good

Over: NEW COLUMBIA DITCH

2 MI S OF JOHNSON CO, Massac, IL

Built 1971 Load: 42.1 t ADT: 10,600

I 24 EB

Good

Over: NEW COLUMBIA DITCH

2 MI S JOHNSON C L, Massac, IL

Built 1971 Load: 42.1 t ADT: 10,600

PORTLAND ROAD - CH

Good

Over: STREAM

2 MI NW JOPPA, Massac, IL

Built 2019 Load: 42.4 t ADT: 200

US 45-FAS 961

Good

Over: DAVIS BAYOU

BROOKPORT, Massac, IL

Built 1994 Load: 45.7 t ADT: 4,050

HICKORY HILL RD

Good

Over: TRIB TO GURLEY DITCH

.25MI N OF TR 45, Massac, IL

Built 2006 Load: 45.7 t ADT: 25

NEW COLUMBIA RD

Good

Over: NEW COLUMBIA DITCH

4.3 M N ROUND KNOB, Massac, IL

Built 2014 Load: 46.0 t ADT: 500

TR 130

Good

Over: BARNES CREEK

4.5M NE OF BROOKPORT, Massac, IL

Built 2005 Load: 48.0 t ADT: 25

WALDO CHURCH ROAD

Good

Over: TRIB TO FOUR MILE CREEK

1.5 MI NE METROPOLIS, Massac, IL

Built 2023 Load: 50.2 t ADT: 125

I 24

Good

Over: E FORK GURLEY DITCH

4.5 MI S JOHNSON CO, Massac, IL

Built 1971 Load: 52.5 t ADT: 21,200

UNIONVILLE RD

Good

Over: MUD CREEK

6.9 MI E BROOKPORT, Massac, IL

Built 2022 Load: 59.0 t ADT: 350

OR4

Good

Over: Massac Creek

Fort Massac State Park, Massac, IL

Built 2021 Load: 59.6 t ADT: 125

TR 82

Poor

Over: ICG RR

3 MI.S.BIG BAY STA., Massac, IL

Built 1900 Load: 0.0 t ADT: 25

KINNEMAN LAKE ROAD

Poor

Over: STREAM N OF OHIO RIV

.5 MI N OHIO RIVER, Massac, IL

Built 1900 Load: 9.4 t ADT: 75

PELL ROAD

Poor

Over: STREAM E OF US 45

.25 MI E US45, Massac, IL

Built 1900 Load: 19.4 t ADT: 550

CRESTWOOD ROAD

Poor

Over: BARNES CREEK

7.2 MI N BROOKPORT, Massac, IL

Built 1939 Load: 19.8 t ADT: 200

DRY RIDGE ROAD

Poor

Over: MAIN DITCH

0.9 MI E US 45, Massac, IL

Built 1964 Load: 22.4 t ADT: 25

FAS 929

Poor

Over: ICGRR

ROUND KNOB, Massac, IL

Built 1985 Load: 27.9 t ADT: 650

TWP RD 104

Poor

Over: MASSAC CK

4.5 MI EAST RD KNOB, Massac, IL

Built 1977 Load: 28.8 t ADT: 25

I 24 WB

Poor

Over: BEAR CREEK

4 MI S JOHNSON CO, Massac, IL

Built 1971 Load: 34.3 t ADT: 10,600

TWP RD 58

Poor

Over: BEAR CK

3 MI EAST MERMET, Massac, IL

Built 1977 Load: 35.0 t ADT: 100

TR 117

Poor

Over: WEAVER CREEK

1 MI NORTH METROPOLI, Massac, IL

Built 1980 Load: 37.9 t ADT: 275

TR-59 (Mermet Road

Poor

Over: SIELBECK DITCH

6.3MI NW METROPOLIS, Massac, IL

Built 2018 Load: 39.9 t ADT: 175

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.