County profile · official public datasets

Henderson County, IL

142 public highway bridges tracked in the FHWA National Bridge Inventory: 33.1% rated Good, 54.9% Fair, 12% Poor.

142
Public bridges
33.1%
Good condition
12%
Poor condition

The verdict

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

Henderson County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

81st
of 102 on Poor share
12%
Poor-condition share
142
public highway bridges
1985
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.

Henderson County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Henderson County ranks #81 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 12%). Henderson County, Illinois contains 142 public highway bridges. Roughly 33.1% are rated “Good,” 54.9% “Fair,” and 12% “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

142

Public highway bridges in Henderson County

Good condition

33.1%

47 of 142 rated 7-9

Fair condition

54.9%

78 of 142 rated 5-6

Poor condition

12%

17 of 142 rated 4 or below

In-state Poor-share rank

#81 of 102

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

Condition distribution

Share of 142 NBI-tracked bridges by lowest applicable component rating.

Good
33.1% (47)
Fair
54.9% (78)
Poor
12% (17)

Henderson County's Poor-condition bridges carry 4,450 vehicle crossings a day

That is 3.7% of the county's reported daily bridge traffic on 12% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 262 crossings a day against 67 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 142 of 142 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

17.6% of Henderson County's bridges have passed the 50-year mark

25 of the 142 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 33.1% 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 44.9% of the county's Poor-condition bridge traffic

CARMAN RD over DUGOUT CREEK, built 1954, carries 2,000 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 17-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 4,450 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Henderson County's bridges were built

142 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1980s, when 43 of the county's bridges still in the inventory were built, which is 30.3% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1985, 6 years newer than the Illinois average of 1979.

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

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

The 5 Illinois counties nearest Henderson County in number of bridges, with their condition splits. Its 12% Poor share is the 5th-lowest of these 6. Its average build year of 1985 against a peer-group mean of 1982 is in line with the group.

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

Bridge inventory size and condition shares for Henderson County and the 5 Illinois counties closest to it in inventory size
County Bridges Poor
Richland County 151 5.3%
Randolph County 149 7.4%
Henderson County (this page) 142 12%
Perry County 136 7.4%
Kendall County 132 12.1%
Massac County 132 8.3%

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 Henderson 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 Henderson County, both outside Illinois so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside IL (142 bridges here).

Similar average build year

Nearest mean year-built outside IL (1985 here).

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

All 142 Good 47 Fair 78 Poor 17

Fair-condition bridges (78)

US 34

Fair

Over: CHINN ST GULFPORT

0.25 MI E MISS RIV, Henderson, IL

Built 1970 Load: 38.6 t ADT: 10,200

US 34

Fair

Over: LONE TREE CREEK

6.5 MI W BIGGSVILLE, Henderson, IL

Built 2002 Load: 39.2 t ADT: 6,050

ILL 94

Fair

Over: JINKS HOLLOW CREEK

3.5 MI N BIGGSVILLE, Henderson, IL

Built 1988 Load: 40.2 t ADT: 575

US 34

Fair

Over: P.D. CREEK

7.5 MI W BIGGSVILLE, Henderson, IL

Built 2008 Load: 40.2 t ADT: 6,050

ILL 96

Fair

Over: THOMPSON CREEK

AT THIRD AND ELM STS, Henderson, IL

Built 2010 Load: 40.5 t ADT: 1,950

IL 94

Fair

Over: N HENDERSON CREEK

3.6MI W OF IL 135, Henderson, IL

Built 1988 Load: 40.5 t ADT: 500

ILL 94

Fair

Over: HENDERSON CREEK

1.25 MI S BALD BLUFF, Henderson, IL

Built 1991 Load: 42.4 t ADT: 275

ILL 164

Fair

Over: STREAM

1.4 MI. N GLADSTONE, Henderson, IL

Built 1934 Load: 42.4 t ADT: 2,050

ILL 164

Fair

Over: HENDERSON CREEK

1.5 MI E OF OQUAWKA, Henderson, IL

Built 1980 Load: 43.1 t ADT: 1,500

ILL 164

Fair

Over: S HENDERSON CREEK

.7 MI N OF GLADSTONE, Henderson, IL

Built 1994 Load: 43.1 t ADT: 2,050

ILL 94

Fair

Over: FALL CREEK

4.3 MI N JCT 94&164, Henderson, IL

Built 1991 Load: 43.4 t ADT: 275

ILL 96

Fair

Over: SILVER CREEK

2 MI W OF LOMAX, Henderson, IL

Built 1936 Load: 43.7 t ADT: 1,500

ILL 94

Fair

Over: BNSFRR/ HENDERSON CR

N EDGE BIGGSVILLE, Henderson, IL

Built 1995 Load: 44.7 t ADT: 950

ILL 94

Fair

Over: DUGOUT CREEK

.5 MI S TERRE HAUTE, Henderson, IL

Built 2002 Load: 44.7 t ADT: 1,050

ILL 96

Fair

Over: CAMP CREEK

1 MI E. DALLAS CITY, Henderson, IL

Built 1992 Load: 45.7 t ADT: 1,500

IL 96

Fair

Over: WEAVER CREEK

.75 MI W OF LOMAX, Henderson, IL

Built 1992 Load: 47.6 t ADT: 1,500

ILL 96

Fair

Over: DUGOUT CREEK

.5 MI E OF LOMAX, Henderson, IL

Built 1938 Load: 48.9 t ADT: 1,000

ILL 94

Fair

Over: MIDDLE CREEK

1 MI N STRONGHURST, Henderson, IL

Built 2010 Load: 49.6 t ADT: 1,350

ILL 94

Fair

Over: SMITH CREEK

.25MI N of IL 164, Henderson, IL

Built 1932 Load: 51.2 t ADT: 375

IL94/116

Fair

Over: US 34

SW OF BIGGSVILLE, Henderson, IL

Built 2014 Load: 51.5 t ADT: 1,400

ILL 164

Fair

Over: SMITH CREEK

2.3 MI E OF OQUAWKA, Henderson, IL

Built 2011 Load: 51.5 t ADT: 1,500

CARMAN RD

Fair

Over: HONEY CREEK

2.3 MI N OF ILL 96, Henderson, IL

Built 2012 Load: 51.8 t ADT: 2,000

CARMAN RD

Fair

Over: ELLISON CREEK

3 MI S US 34, Henderson, IL

Built 2015 Load: 53.8 t ADT: 3,200

ILL 94

Fair

Over: HENDERSON OVERFLOW

1 MI S BALD BLUFF, Henderson, IL

Built 1934 Load: 55.1 t ADT: 275

ILL 94

Fair

Over: DIXSON CREEK

0.24 M N STRONGHURST, Henderson, IL

Built 2012 Load: 55.7 t ADT: 1,350

ILL 94 & 116

Fair

Over: WOLF CR

2.8 MI N STRONGHURST, Henderson, IL

Built 2012 Load: 55.7 t ADT: 1,400

ILL 94

Fair

Over: HONEY CR

1.5 MI S STRONGHURST, Henderson, IL

Built 1932 Load: 61.6 t ADT: 1,350

ILL 94 & 116

Fair

Over: ELLISON CREEK

1.8 MI N STRONGHURST, Henderson, IL

Built 2011 Load: 81.6 t ADT: 1,550

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.