County profile · official public datasets

Kankakee County, IL

344 public highway bridges tracked in the FHWA National Bridge Inventory: 40.1% rated Good, 53.5% Fair, 6.4% Poor.

344
Public bridges
40.1%
Good condition
6.4%
Poor condition

The verdict

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

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

Top 31%
lowest Poor share in state
6.4%
Poor-condition share
344
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.

Kankakee County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Kankakee County ranks #32 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.4%). Kankakee County, Illinois contains 344 public highway bridges. Roughly 40.1% are rated “Good,” 53.5% “Fair,” and 6.4% “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

344

Public highway bridges in Kankakee County

Good condition

40.1%

138 of 344 rated 7-9

Fair condition

53.5%

184 of 344 rated 5-6

Poor condition

6.4%

22 of 344 rated 4 or below

In-state Poor-share rank

#32 of 102

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

Condition distribution

Share of 344 NBI-tracked bridges by lowest applicable component rating.

Good
40.1% (138)
Fair
53.5% (184)
Poor
6.4% (22)

Kankakee County's Poor-condition bridges carry 79,175 vehicle crossings a day

That is 10.2% of the county's reported daily bridge traffic on 6.4% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 3,599 crossings a day against 1,505 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 344 of 344 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

33.4% of Kankakee County's bridges have passed the 50-year mark

115 of the 344 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 40.1% 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 18.3% of the county's Poor-condition bridge traffic

FAI-57 SB over ILL 17, built 1955, carries 14,450 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 22-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 79,175 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Kankakee County's bridges were built

344 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1980s, when 82 of the county's bridges still in the inventory were built, which is 23.8% 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).

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

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

The 5 Illinois counties nearest Kankakee County in number of bridges, with their condition splits. Its 6.4% Poor share is the 3rd-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1983 is in line with the group.

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

Bridge inventory size and condition shares for Kankakee County and the 5 Illinois counties closest to it in inventory size
County Bridges Poor
Peoria County 352 18.2%
Macon County 346 15.6%
DuPage County 344 8.1%
Kankakee County (this page) 344 6.4%
Stephenson County 342 2.6%
Kane County 336 6.3%

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

Similar inventory size

Nearest county inventories outside IL (344 bridges here).

Similar average build year

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

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

All 344 Good 138 Fair 184 Poor 22

Fair-condition bridges (184)

FAS 302 (CH 20)

Fair

Over: KANKAKEE R

4.46 MI NE BONFIELD, Kankakee, IL

Built 1970 Load: 39.2 t ADT: 5,250

ILL 17 WB

Fair

Over: DRAIN DT

3.5 M E OF KANKAKEE, Kankakee, IL

Built 1964 Load: 39.9 t ADT: 11,900

ILL 17 EB

Fair

Over: DRAIN DT

3.5 M E OF KANKAKEE, Kankakee, IL

Built 1964 Load: 39.9 t ADT: 11,900

CH 35

Fair

Over: MINNIE CR

3.5 MI S KANKAKEE, Kankakee, IL

Built 1905 Load: 39.9 t ADT: 150

TR 142

Fair

Over: N BRANCH ROCK CREEK

3MI NW MANTENO, Kankakee, IL

Built 1969 Load: 39.9 t ADT: 250

FAU 6189/RIVER RD

Fair

Over: GAR CREEK

.1 MI E RTE 45/52, Kankakee, IL

Built 2001 Load: 39.9 t ADT: 2,650

IL 50 FAP 840

Fair

Over: SOLDIER CREEK

N LMTS KKK, Kankakee, IL

Built 2003 Load: 40.5 t ADT: 16,200

I 57 SB

Fair

Over: Minnie Creek

4.3 M N Chebanse Int, Kankakee, IL

Built 1993 Load: 40.8 t ADT: 9,700

U.S. Routes 45/52

Fair

Over: KANKAKEE RIVER

.60 MI S OF ILL 17, Kankakee, IL

Built 1990 Load: 41.1 t ADT: 7,400

FAI-57 SB

Fair

Over: SOLDIER CR

1.8 MI N OF ILL 17, Kankakee, IL

Built 1955 Load: 41.5 t ADT: 14,450

FAI-57 NB

Fair

Over: SOLDIER CR

1.8 MI N OF ILL RT17, Kankakee, IL

Built 1955 Load: 41.5 t ADT: 14,450

ILL 1 & 17

Fair

Over: KKK RIVER

MOMENCE, Kankakee, IL

Built 1986 Load: 41.5 t ADT: 9,750

I-57 SB

Fair

Over: CN RAILROAD

0.3 MI NW IL 50, Kankakee, IL

Built 2012 Load: 41.5 t ADT: 13,700

FAP840-US45/52

Fair

Over: GARR CREEK

1MI N OF I-57, Kankakee, IL

Built 1997 Load: 42.4 t ADT: 10,800

CH 25

Fair

Over: REDDICK RUN

REDDICK, Kankakee, IL

Built 1956 Load: 42.4 t ADT: 300

US 52 & 45

Fair

Over: MINNIE CREEK

1.2 M S OF I-57, Kankakee, IL

Built 1971 Load: 42.8 t ADT: 5,750

ILL 113

Fair

Over: WILEY CREEK

4.7 MI N OF IL 17, Kankakee, IL

Built 2006 Load: 45.0 t ADT: 3,550

ILL 17

Fair

Over: LEHIGH RAYMOND RUN

1.5 M W BONFIELD RD, Kankakee, IL

Built 1959 Load: 45.0 t ADT: 3,650

I-57 NB

Fair

Over: KANKAKEE RIVER

2.9 M N of 45 & 52, Kankakee, IL

Built 2016 Load: 45.7 t ADT: 11,650

TR 9

Fair

Over: BULL CR

3.5 MI N SHURBURNVL, Kankakee, IL

Built 1979 Load: 45.7 t ADT: 250

ILL 115

Fair

Over: W BR OF HORSE CREEK

.5 MI W OF HERSCHER, Kankakee, IL

Built 1982 Load: 46.0 t ADT: 1,450

ILL 50 FAP 840

Fair

Over: KANKAKEE RIV.

1 M N JT US 45 & 52, Kankakee, IL

Built 1953 Load: 47.0 t ADT: 12,200

I-57 NB

Fair

Over: CN RAILROAD

0.3 MI NW OF IL 50, Kankakee, IL

Built 2012 Load: 47.0 t ADT: 13,700

I-57 NB

Fair

Over: IL 50

I-57 & IL 50 INTRCHG, Kankakee, IL

Built 2012 Load: 47.6 t ADT: 13,700

ILL 17

Fair

Over: CRANE CR

2.0 M E OF REDDICK, Kankakee, IL

Built 2003 Load: 49.6 t ADT: 2,300

US45/52 (FAP330)

Fair

Over: SOLDIERS CREEK

50 FT N. COURT ST., Kankakee, IL

Built 2001 Load: 49.9 t ADT: 19,100

ILL 1 & 17

Fair

Over: KKK RIVER S BR.

MOMENCE, Kankakee, IL

Built 1938 Load: 50.5 t ADT: 9,750

IL 1

Fair

Over: DITCH

08 MI S. OF IL 17, Kankakee, IL

Built 1995 Load: 50.5 t ADT: 4,450

TR 25

Fair

Over: ROCK CREEK

3 MI SE DESELM, Kankakee, IL

Built 1977 Load: 51.8 t ADT: 150

ILL 1

Fair

Over: TRIM CR

0.2 M W. GRANT PARK, Kankakee, IL

Built 1954 Load: 58.6 t ADT: 2,950

IL 17 FAP 330

Fair

Over: ICG RR

0.1 MI EAST OF US 45, Kankakee, IL

Built 2004 Load: 62.2 t ADT: 15,900

IL 17

Fair

Over: MAZON RIVER

1.5 M. E. OF REDDICK, Kankakee, IL

Built 2003 Load: 66.7 t ADT: 2,300

TR 3

Fair

Over: FORKED CR

3MI NE DESELM, Kankakee, IL

Built 1980 Load: 81.6 t ADT: 50

IL 17/FAS 310

Fair

Over: PIKE CREEK

2.1 M SE OF JCT 1&17, Kankakee, IL

Built 2001 Load: 87.5 t ADT: 4,900

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.