County profile · official public datasets

Jasper County, IL

181 public highway bridges tracked in the FHWA National Bridge Inventory: 70.7% rated Good, 24.3% Fair, 5% Poor.

181
Public bridges: 70.7%
Good condition: 5%
Poor condition

The verdict

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

Jasper County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 17%
lowest Poor share in state: 5%
Poor-condition share: 181
public highway bridges: 1982
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.

Jasper County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Jasper County ranks #17 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5%). Jasper County, Illinois contains 181 public highway bridges. Roughly 70.7% are rated “Good,” 24.3% “Fair,” and 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.

Total bridges

181

Public highway bridges in Jasper County

Good condition

70.7%

128 of 181 rated 7-9

Fair condition

24.3%

44 of 181 rated 5-6

Poor condition

9 of 181 rated 4 or below

In-state Poor-share rank

#17 of 102

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

Condition distribution

Share of 181 NBI-tracked bridges by lowest applicable component rating.

Good

70.7% (128)

Fair

24.3% (44)

Poor

5% (9)

Jasper County's Poor-condition bridges carry 4,975 vehicle crossings a day

That is 5.1% of the county's reported daily bridge traffic on 5% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 553 crossings a day against 413 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 181 of 181 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

19.9% of Jasper County's bridges have passed the 50-year mark

36 of the 181 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 70.7% 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 88.4% of the county's Poor-condition bridge traffic

FAP-116 (ILL-130) over FOX RIVER, built 1928, carries 4,400 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 9-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 4,975 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

16
1910s

1
1920s

2
1930s

2
1950s

3
1960s

8
1970s

14
1980s

53
1990s

35
2000s

28
2010s

19

What this shows Construction peaked in the 1980s, when 53 of the county's bridges still in the inventory were built, which is 29.3% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1982) matches the Illinois average (1979).

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

The 5 Illinois counties nearest Jasper County in number of bridges, with their condition splits. Its 5% Poor share is the 2nd-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1980 is in line with the group.

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

Bridge inventory size and condition shares for Jasper County and the 5 Illinois counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Clinton County	190	56.3%	36.3%	7.4%	1976
Lawrence County	185	36.2%	41.1%	22.7%	1975
Saline County	185	71.4%	23.8%	4.9%	1985
Jasper County (this page)	181	70.7%	24.3%	5%	1982
Carroll County	179	37.4%	52%	10.6%	1979
Moultrie County	172	39%	51.2%	9.9%	1984

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

Similar inventory size

Nearest county inventories outside IL (181 bridges here).

Lamar County, AL · 181 bridges
Malheur County, OR · 181 bridges
Lancaster County, SC · 181 bridges
Potter County, TX · 181 bridges

Similar average build year

Nearest mean year-built outside IL (1982 here).

Oklahoma County, OK · avg 1982 · 1,216 bridges
Jackson County, MO · avg 1982 · 930 bridges
Milwaukee County, WI · avg 1982 · 893 bridges
Broward County, FL · avg 1982 · 686 bridges

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

All 181 Good 128 Fair 44 Poor 9

All bridges (181)

Sort:

Jasper County Bridge Snapshot

Condition distribution

Jasper County's Poor-condition bridges carry 4,975 vehicle crossings a day

19.9% of Jasper County's bridges have passed the 50-year mark

One structure carries 88.4% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (181)

TR-77

FAS-1805{CH-16}

TR-192

FAS-705

MS-3600

TR-44

FAS-704

FAS-2706 (CH-6)

CH-10

FAP-781 (ILL-33)

FAS-704

FAS 2711 CH 10

TR-201

FAS 2708 CH 13

TR-266

FAS-707

TR-240

CH-2

FAS-2705

TR-114B

TR-36

CH-5

FAS-707

TR-67

TR-169

TR 61

TR 221

CH-14

TR203

TR 93

TR 139

MAIN STREET #7000

FAP-116 (ILL-33/13

FAP-116 (ILL-130)

TR-271

TR-77

FAP-116 (ILL-33/13

FAP-781 (ILL-33)

FAS 2708 CH 13

FAS 2709 ST MARIE

FAP-781 (ILL-33)

CH 14

FAS 705(IL 49)

FAP-95(ILL 33)

FAS-704

TR-276

CH-14

FAS 706

SCOTT AVE #8000

CH 11

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