Total bridges
132
Public highway bridges in Kendall County
County profile · official public datasets
Kendall County, IL
132 public highway bridges tracked in the FHWA National Bridge Inventory: 52.3% rated Good, 35.6% Fair, 12.1% Poor.
- 132
- Public bridges
- 52.3%
- Good condition
- 12.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Kendall 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.
- 82nd
- of 102 on Poor share
- 12.1%
- Poor-condition share
- 132
- public highway bridges
- 1990
- 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.
Kendall County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Kendall County ranks #82 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 12.1%). Kendall County, Illinois contains 132 public highway bridges. Roughly 52.3% are rated “Good,” 35.6% “Fair,” and 12.1% “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.
Good condition
52.3%
69 of 132 rated 7-9
Fair condition
35.6%
47 of 132 rated 5-6
Poor condition
12.1%
16 of 132 rated 4 or below
In-state Poor-share rank
#82 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 52.3% (69)
Fair 35.6% (47)
Poor 12.1% (16)
Kendall County's Poor-condition bridges carry 10,125 vehicle crossings a day
That is 2.1% of the county's reported daily bridge traffic on 12.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 633 crossings a day against 3,457 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 132 of 132 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
19.7% of Kendall County's bridges have passed the 50-year mark
26 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 52.3% 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 15.3% of the county's Poor-condition bridge traffic
CREEK RD over LITTLE ROCK CK, built 1995, carries 1,550 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 16-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 10,125 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Kendall County's bridges were built
132 bridges with a recorded construction year, grouped by decade
- 1910s 2
1910–1919
2 bridges
- 1930s 3
1930–1939
3 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s 5
1950–1959
5 bridges
- 1960s 8
1960–1969
8 bridges
- 1970s
1970–1979
17 bridges
- 1980s
1980–1989
19 bridges
- 1990s
1990–1999
33 bridges
- 2000s
2000–2009
24 bridges
- 2010s 12
2010–2019
12 bridges
- 2020s 8
2020–2029
8 bridges
What this shows Construction peaked in the 1990s, when 33 of the county's bridges still in the inventory were built, which is 25% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1990, 11 years newer than the Illinois average of 1979.
How Kendall County compares with Illinois's closest counties by inventory size
The 5 Illinois counties nearest Kendall County in number of bridges, with their condition splits. Its 12.1% Poor share is the 6th-lowest of these 6. Its average build year of 1990 against a peer-group mean of 1982 is 8 years newer.
Showing the 5 closest of 101 Illinois counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Henderson County | 142 | 33.1% | 54.9% | 12% | 1985 |
| Perry County | 136 | 38.2% | 54.4% | 7.4% | 1981 |
| Massac County | 132 | 43.9% | 47.7% | 8.3% | 1980 |
| Monroe County | 132 | 59.1% | 34.1% | 6.8% | 1986 |
| Kendall County (this page) | 132 | 52.3% | 35.6% | 12.1% | 1990 |
| Johnson County | 118 | 58.5% | 39% | 2.5% | 1979 |
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 Kendall 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 Kendall 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).
- St. Joseph County, MI · 132 bridges
- Otero County, NM · 132 bridges
- Prince George County, VA · 132 bridges
- Suffolk city County, VA · 132 bridges
Similar average build year
Nearest mean year-built outside IL (1990 here).
- Maricopa County, AZ · avg 1990 · 2,847 bridges
- Tarrant County, TX · avg 1990 · 2,617 bridges
- Fairfax County, VA · avg 1990 · 751 bridges
- Guilford County, NC · avg 1990 · 736 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (47)
WHEELER RD
FairOver: EAST AUX SABLE CK
.5 MI E OF SCHLAPP R, Kendall, IL
Built 1970 Load: 22.0 t ADT: 125
HANSON RD
FairOver: AUX SABLE CK
.5 MI N OF HOLT RD, Kendall, IL
Built 1972 Load: 22.4 t ADT: 100
CHICAGO RD
FairOver: MIDDLE AUXSABLE CK
.5 MI E OF GROVE RD, Kendall, IL
Built 1972 Load: 23.0 t ADT: 75
RIDGE ROAD
FairOver: AUX SABLE CREEK
CH11 OVR AUX SABLE, Kendall, IL
Built 1948 Load: 23.7 t ADT: 10,300
CHICAGO RD/MS0025
FairOver: BR W AUX SABLE CR
0.88 MI SW OF CH 8, Kendall, IL
Built 1910 Load: 23.7 t ADT: 75
Whitewillow Road
FairOver: Valley Run Creek
1.2 Mi W of 47, Kendall, IL
Built 1970 Load: 24.3 t ADT: 150
FAXON RD/MS 3210
FairOver: ROB ROY CK
1 MI W OF CANNONBALL, Kendall, IL
Built 1976 Load: 24.3 t ADT: 550
FAU 3792 MINKLER R
FairOver: MORGAN CREEK
1.5 MI S. IL RT 71, Kendall, IL
Built 1914 Load: 24.9 t ADT: 3,850
GROVE RD (CULVERT)
FairOver: NORTH MORGAN CREEK
1.2 MI S OF ILL 71, Kendall, IL
Built 1955 Load: 27.5 t ADT: 3,600
CHURCH RD
FairOver: W. AUX SABLE
1 MI S OF PLATVILLE, Kendall, IL
Built 1959 Load: 28.8 t ADT: 125
GALENA RD FAU2502
FairOver: LITTLE ROCK CREEK
ITEM 7 OVR ITEM 6, Kendall, IL
Built 2006 Load: 30.5 t ADT: 6,950
FOX RIVER DR
FairOver: FOX RIVER
CH15 OVR FOX RIVER, Kendall, IL
Built 1969 Load: 30.8 t ADT: 4,750
HELMAR RD
FairOver: AUX SABLE CK
2 MI E OF ILL 47, Kendall, IL
Built 1979 Load: 32.4 t ADT: 75
WHITFIELD RD MS00
FairOver: FOX RIVER
SECT 8 & 9 LINE, Kendall, IL
Built 1984 Load: 32.4 t ADT: 2,450
HENNING RD
FairOver: BIG ROCK CR
.5 M E ROCK CR RD, Kendall, IL
Built 1987 Load: 32.4 t ADT: 25
TR 131 WHITEWILLOW
FairOver: ROODS CREEK
.25 MI W STEPHENS RD, Kendall, IL
Built 1988 Load: 32.4 t ADT: 250
HALE STREET #6680
FairOver: BIG ROCK CREEK
SEC 27 T37N R6E, Kendall, IL
Built 1990 Load: 32.4 t ADT: 950
Corneils Rd/MS 320
FairOver: ROB ROY CREEK
IN YORKVILLE, Kendall, IL
Built 1999 Load: 32.4 t ADT: 1,050
SCHLAPP RD
FairOver: E.AUX SABLE CR
0.9 MI S.OF IL 126, Kendall, IL
Built 2000 Load: 32.4 t ADT: 1,000
HOPKINS RD TR 94
FairOver: MIDDLE AUX SABLE CR
1.45 MI S OF IL 126, Kendall, IL
Built 2002 Load: 32.4 t ADT: 150
WHEELER RD
FairOver: MIDDLE AUXSABLE CK
BY HOPKINS RD, Kendall, IL
Built 1978 Load: 33.4 t ADT: 125
WHEELER RD TR 79
FairOver: MIDDLE AUXSABLE CK
0.75 MILESW OF GROVE, Kendall, IL
Built 1980 Load: 33.4 t ADT: 125
CATON FARM ROAD
FairOver: MID. AUX SABLE CR.
CH23 OVR AUX SABLE, Kendall, IL
Built 1965 Load: 33.7 t ADT: 2,150
FAS-300 CatonFrmRd
FairOver: E Aux Sable Creek
CH23 OVR AUX SABLE, Kendall, IL
Built 1965 Load: 33.7 t ADT: 5,700
BLACKHAWK RD
FairOver: ROB ROY CK
BY RIVER RD, Kendall, IL
Built 1978 Load: 34.7 t ADT: 800
BR1SBIN RD/MS0020
FairOver: W AUX SABLE CK
1.5 MI N OF ILL 52, Kendall, IL
Built 1981 Load: 34.7 t ADT: 225
CATON FARM RD CH 2
FairOver: AUX SABLE CK
1.5 MI E OF ILL 47, Kendall, IL
Built 1978 Load: 35.0 t ADT: 1,650
PFUND CT
FairOver: WAUBANSEE CK
0.25 MI N OF US 34, Kendall, IL
Built 1930 Load: 35.3 t ADT: 50
CH 1 / Fox River D
FairOver: BIG ROCK CREEK
1.5 MI S RTE 34, Kendall, IL
Built 2008 Load: 36.0 t ADT: 4,450
US 34/ FAP 591
FairOver: BIG ROCK CR
4.3 M. W. of IL 47, Kendall, IL
Built 1990 Load: 37.3 t ADT: 16,000
US 34
FairOver: WAUBANSEE CREEK
E.LIMITS OF OSWEGO, Kendall, IL
Built 2001 Load: 37.6 t ADT: 22,300
US 52
FairOver: LISBON CREEK
1.09 MI W ILL 47, Kendall, IL
Built 1936 Load: 37.9 t ADT: 1,150
TR 125 BELL RD
FairOver: AUX SABLE CREEK
BY JUGHANDLE ROAD, Kendall, IL
Built 1983 Load: 37.9 t ADT: 425
US 34/FAP 311
FairOver: WAUBANSEE CREEK
0.5 MI E OF OSWEGO, Kendall, IL
Built 2002 Load: 38.2 t ADT: 24,700
ASHLEY RD TR 86
FairOver: AUX SABLE DRAINAGE
1.14 MI N OF ILL 52, Kendall, IL
Built 1985 Load: 38.6 t ADT: 400
PLATTVILLE RD
FairOver: AUX SABLE CREEK
0.7 MI E OF RTE 47, Kendall, IL
Built 1995 Load: 39.9 t ADT: 300
ILL 71
FairOver: ROADS CR
.5MI SW NEWARK, Kendall, IL
Built 1997 Load: 40.8 t ADT: 5,100
ILL 47
FairOver: FOX RIVER
0.95 MI S OF US 34, Kendall, IL
Built 1984 Load: 42.1 t ADT: 24,800
US 34
FairOver: FOX RIVER
US 34 & FOX RIVER, Kendall, IL
Built 1993 Load: 44.1 t ADT: 16,300
ORCHARD RD
FairOver: Fox River & Omnitrax
0.1 MI N OF IL 71, Kendall, IL
Built 2000 Load: 46.7 t ADT: 13,900
CH 2 FAS 1259
FairOver: AUX SABLE CREEK
2.8S 4.25E YORKVILLE, Kendall, IL
Built 2001 Load: 47.0 t ADT: 2,850
SHERRILL RD
FairOver: AUX SABLE CREEK
0.5 MI W OF OBRIEN, Kendall, IL
Built 1995 Load: 51.5 t ADT: 450
US 52
FairOver: ROODS CREEK
9 M W OF IL 47, Kendall, IL
Built 1992 Load: 52.2 t ADT: 1,300
IL 47
FairOver: BLACKBERRY CK.
1 M N OF US 34, Kendall, IL
Built 1994 Load: 59.6 t ADT: 15,300
US RTE 52
FairOver: E BR AUX SABLE CR
6.5 MI E OF ILL 47, Kendall, IL
Built 2000 Load: 61.6 t ADT: 5,000
GALENA ROAD
FairOver: BIG ROCK CREEK
CH9 OVR BIG ROCK, Kendall, IL
Built 1964 Load: 65.1 t ADT: 6,800
ORCHARD RD
FairOver: GATES CR/TRIB TO FOX
0.5 MI S OF US 34, Kendall, IL
Built 2000 Load: 71.0 t ADT: 13,900
Read our methodology - how this data is sourced, computed, and verified.
Related
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.