County profile · official public datasets

Livingston County, IL

579 public highway bridges tracked in the FHWA National Bridge Inventory: 51.8% rated Good, 39.9% Fair, 8.3% Poor.

579
Public bridges
51.8%
Good condition
8.3%
Poor condition

The verdict

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

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

57th
of 102 on Poor share
8.3%
Poor-condition share
579
public highway bridges
1978
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.

Livingston County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Livingston County ranks #57 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.3%). Livingston County, Illinois contains 579 public highway bridges. Roughly 51.8% are rated “Good,” 39.9% “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

579

Public highway bridges in Livingston County

Good condition

51.8%

300 of 579 rated 7-9

Fair condition

39.9%

231 of 579 rated 5-6

Poor condition

8.3%

48 of 579 rated 4 or below

In-state Poor-share rank

#57 of 102

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

Condition distribution

Share of 579 NBI-tracked bridges by lowest applicable component rating.

Good
51.8% (300)
Fair
39.9% (231)
Poor
8.3% (48)

Livingston County's Poor-condition bridges carry 30,010 vehicle crossings a day

That is 6.3% of the county's reported daily bridge traffic on 8.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 625 crossings a day against 552 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 577 of 579 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

39.4% of Livingston County's bridges have passed the 50-year mark

228 of the 579 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 51.8% 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 13% of the county's Poor-condition bridge traffic

ILL 23 over I-55, built 1972, carries 3,900 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 48-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 30,010 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Livingston County's bridges were built

579 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1980s, when 102 of the county's bridges still in the inventory were built, which is 17.6% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1978) matches the Illinois average (1979).

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

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

The 5 Illinois counties nearest Livingston County in number of bridges, with their condition splits. Its 8.3% Poor share is the 2nd-lowest of these 6. Its average build year of 1978 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 Livingston County and the 5 Illinois counties closest to it in inventory size
County Bridges Poor
Will County 649 10.5%
McLean County 624 2.9%
Livingston County (this page) 579 8.3%
Iroquois County 570 14.4%
LaSalle County 528 12.3%
Madison County 523 8.4%

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

Similar inventory size

Nearest county inventories outside IL (579 bridges here).

Similar average build year

Nearest mean year-built outside IL (1978 here).

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

All 579 Good 300 Fair 231 Poor 48

Fair-condition bridges (231)

FAI-55 SB

Fair

Over: BR W FORK MAZON R.

3 MI SW OF DWIGHT, Livingston, IL

Built 1972 Load: 40.8 t ADT: 10,450

FAI-55 NB

Fair

Over: BR W FORK MAZON R.

3 MI SW OF DWIGHT, Livingston, IL

Built 1972 Load: 40.8 t ADT: 10,450

TR 95

Fair

Over: DIAMOND CREEK

35 E 2200 N, Livingston, IL

Built 1965 Load: 40.8 t ADT: 75

CH 16/FAS 355

Fair

Over: LONG POINT CREEK

1 MI E OF LONG POINT, Livingston, IL

Built 1986 Load: 41.1 t ADT: 550

OLD RT 66 FAS 294

Fair

Over: DRAIN DT

7.71 M S OF ILL 116, Livingston, IL

Built 1954 Load: 41.5 t ADT: 3,100

FAP 786 / IL 170

Fair

Over: BR OF BAKER RUN

6.94 MI S OF ILL 17, Livingston, IL

Built 1990 Load: 41.5 t ADT: 1,550

ILL 116 EB

Fair

Over: VERMILLION RIVER

0.55 MI S OF ILL 23, Livingston, IL

Built 1954 Load: 42.4 t ADT: 7,700

ILL 116 WB

Fair

Over: VERMILLION RIVER

0.55 MI S OF ILL 23, Livingston, IL

Built 1947 Load: 42.4 t ADT: 7,700

CO HWY 23 FAS-1347

Fair

Over: FIVE MILE CREEK

2.50MI E OF SAUNEMIN, Livingston, IL

Built 1962 Load: 42.8 t ADT: 75

ILL 23

Fair

Over: DRAIN DITCH

10.2 MI N OF OLD 66, Livingston, IL

Built 1996 Load: 44.4 t ADT: 1,850

TR 32

Fair

Over: LONG POINT CREEK

2680 N 600 E, Livingston, IL

Built 1965 Load: 44.7 t ADT: 50

TR 91

Fair

Over: DEER CREEK

1695 E 2300N, Livingston, IL

Built 1922 Load: 45.0 t ADT: 25

ILL 23

Fair

Over: BAKER RUN

4.38 MI N OF I-55, Livingston, IL

Built 1977 Load: 46.3 t ADT: 2,900

IL 23 FAP 68

Fair

Over: SHORT POINT CR

7.31 MI S OF IL 17, Livingston, IL

Built 2011 Load: 47.3 t ADT: 1,550

ILL 47

Fair

Over: 5 M CREEK

0.3 M N. OF RTE 116, Livingston, IL

Built 1929 Load: 49.9 t ADT: 2,150

TR 107

Fair

Over: WOLF CREEK

1205 E 2100 N, Livingston, IL

Built 1961 Load: 49.9 t ADT: 325

ILL 47/FAP 326

Fair

Over: VERMILION RIVER

.38 M S OF US 24, Livingston, IL

Built 1993 Load: 50.2 t ADT: 2,650

I-55 SB

Fair

Over: NORFOLK & SO. RR

0.5 MI N. IL 17, Livingston, IL

Built 2011 Load: 52.5 t ADT: 11,450

I-55 NB

Fair

Over: NORFOLK & SO RR

0.5 MI N OF IL 17, Livingston, IL

Built 2011 Load: 52.5 t ADT: 11,450

ILL 17 FAP 649

Fair

Over: PRAIRIE CREEK

1 MI E OF ILL 23, Livingston, IL

Built 1989 Load: 53.1 t ADT: 1,800

I-55 SB

Fair

Over: VERMILLION RIVER

1.5 M N of IL 116, Livingston, IL

Built 1975 Load: 53.5 t ADT: 10,900

I-55 NB

Fair

Over: VERMILION RIVER

1.5 M N of IL 116, Livingston, IL

Built 1975 Load: 53.5 t ADT: 10,900

OLD US 66/ SBI-4C

Fair

Over: DRAINAGE DITCH

0.03 MI NE OF ILL 47, Livingston, IL

Built 1981 Load: 54.1 t ADT: 175

OLD RT 66 FAS 294

Fair

Over: ROOKS CR

4.45 MI S ILL 116, Livingston, IL

Built 1939 Load: 55.1 t ADT: 3,400

FAI-55 & E975 N RD

Fair

Over: DRAINAGE DITCH

0.23 MI N MCLEAN C L, Livingston, IL

Built 1977 Load: 58.0 t ADT: 21,000

ILL 23

Fair

Over: BAKER RUN

4.31 MI N OF I-55, Livingston, IL

Built 1977 Load: 58.6 t ADT: 2,900

ILL 17

Fair

Over: GOOSEBERRY CR. TRIB.

4.5 MI E OF ILL 47, Livingston, IL

Built 1974 Load: 62.2 t ADT: 2,300

FAI-55 SB

Fair

Over: ROOKS CREEK

1.06 MI N MCLEAN C L, Livingston, IL

Built 1977 Load: 62.5 t ADT: 10,500

FAI-55 NB

Fair

Over: ROOKS CREEK

1 MI N MCLEAN CO LN, Livingston, IL

Built 1977 Load: 62.5 t ADT: 10,500

IL 116/FAP 681

Fair

Over: Smith Branch

2.53 mi e 23 & 116, Livingston, IL

Built 2013 Load: 64.8 t ADT: 2,450

ILL 17/FAP 41

Fair

Over: E.FORK OF MAZON RIVR

6.1 MI E OF ILL 47, Livingston, IL

Built 1979 Load: 70.3 t ADT: 1,850

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.