Total bridges
113
Public highway bridges in Jersey County
County profile · official public datasets
Jersey County, IL
113 public highway bridges tracked in the FHWA National Bridge Inventory: 57.5% rated Good, 38.1% Fair, 4.4% Poor.
- 113
- Public bridges
- 57.5%
- Good condition
- 4.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Jersey County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 11%
- lowest Poor share in state
- 4.4%
- Poor-condition share
- 113
- public highway bridges
- 1981
- 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.
Jersey County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Jersey County ranks #11 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.4%). Jersey County, Illinois contains 113 public highway bridges. Roughly 57.5% are rated “Good,” 38.1% “Fair,” and 4.4% “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.
Good condition
57.5%
65 of 113 rated 7-9
Fair condition
38.1%
43 of 113 rated 5-6
Poor condition
4.4%
5 of 113 rated 4 or below
In-state Poor-share rank
#11 of 102
Among Illinois counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 113 NBI-tracked bridges by lowest applicable component rating.
Good 57.5% (65)
Fair 38.1% (43)
Poor 4.4% (5)
Jersey County's Poor-condition bridges carry 1,750 vehicle crossings a day
That is 1.6% of the county's reported daily bridge traffic on 4.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 350 crossings a day against 917 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 113 of 113 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
27.4% of Jersey County's bridges have passed the 50-year mark
31 of the 113 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 57.5% 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 44.3% of the county's Poor-condition bridge traffic
ILL 100 over DRAINS TO EAGLE LAKE, built 1938, carries 775 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 5-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 1,750 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Jersey County's bridges were built
113 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1920s 7
1920–1929
7 bridges
- 1930s 8
1930–1939
8 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s 4
1950–1959
4 bridges
- 1960s 8
1960–1969
8 bridges
- 1970s
1970–1979
15 bridges
- 1980s
1980–1989
21 bridges
- 1990s
1990–1999
19 bridges
- 2000s
2000–2009
17 bridges
- 2010s
2010–2019
10 bridges
- 2020s 2
2020–2029
2 bridges
What this shows Construction peaked in the 1980s, when 21 of the county's bridges still in the inventory were built, which is 18.6% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1981) matches the Illinois average (1979).
How Jersey County compares with Illinois's closest counties by inventory size
The 5 Illinois counties nearest Jersey County in number of bridges, with their condition splits. Its 4.4% Poor share is the 2nd-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1982 is in line with the group.
Showing the 5 closest of 101 Illinois counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Johnson County | 118 | 58.5% | 39% | 2.5% | 1979 |
| Schuyler County | 114 | 21.1% | 68.4% | 10.5% | 1981 |
| Jersey County (this page) | 113 | 57.5% | 38.1% | 4.4% | 1981 |
| Boone County | 109 | 56% | 37.6% | 6.4% | 1986 |
| Pulaski County | 108 | 35.2% | 56.5% | 8.3% | 1981 |
| Scott County | 99 | 54.5% | 38.4% | 7.1% | 1983 |
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 Jersey 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 Jersey County, both outside Illinois so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside IL (113 bridges here).
- Lake County, FL · 113 bridges
- Chattooga County, GA · 113 bridges
- Tipton County, IN · 113 bridges
- Powell County, MT · 113 bridges
Similar average build year
Nearest mean year-built outside IL (1981 here).
- Franklin County, OH · avg 1981 · 922 bridges
- Greenville County, SC · avg 1981 · 635 bridges
- Montgomery County, OH · avg 1981 · 632 bridges
- Shawnee County, KS · avg 1981 · 563 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (113)
TR 77
FairOver: STREAM
0.5 M NE NUTWOOD, Jersey, IL
Built 1924 Load: 17.5 t ADT: 75
IL 100
FairOver: DRAINAGE
0.2 MI S OF 042-2001, Jersey, IL
Built 1935 Load: 18.5 t ADT: 775
TR 199
FairOver: TRIB OF MILL CREEK
0.9 M NE OF ELSAH, Jersey, IL
Built 1970 Load: 18.8 t ADT: 75
FAS 748
FairOver: STREAM
4.75 M S JERSEYVILLE, Jersey, IL
Built 1932 Load: 20.7 t ADT: 450
FAS 749
FairOver: OTTER CREEK
2.2 MI N IL RT 3, Jersey, IL
Built 1963 Load: 21.1 t ADT: 900
TR 22
FairOver: SUGAR CREEK
0.01 MI W OF TR 27, Jersey, IL
Built 1962 Load: 23.7 t ADT: 50
ILL 100
FairOver: COON CREEK
.01 S OF ROSEDALE RD, Jersey, IL
Built 1938 Load: 24.0 t ADT: 775
TR 90-C
FairOver: A STREAM
SEC 12 T6N R13W, Jersey, IL
Built 1960 Load: 24.3 t ADT: 275
ILL 100 (FAP-304)
FairOver: Trib to Otter Creek
1.7 M S JCT ILL 16, Jersey, IL
Built 1925 Load: 24.6 t ADT: 950
FAS 746
FairOver: TRIB OF MACOUPIN CRE
3.7 MI W US 267, Jersey, IL
Built 1953 Load: 25.6 t ADT: 350
FAS 748
FairOver: PIASA CREEK
4.3 M W BRIGHTON, Jersey, IL
Built 1977 Load: 27.5 t ADT: 1,050
FAS 745
FairOver: PHILS CREEK
4.2 MI N ILL 16, Jersey, IL
Built 1951 Load: 29.8 t ADT: 400
FAS 749
FairOver: OTTER CREEK
3.0 MI S ILL 16, Jersey, IL
Built 1960 Load: 30.1 t ADT: 1,100
FAS 748
FairOver: PIASA CREEK
2.3 M E OF ILL 67, Jersey, IL
Built 1977 Load: 30.5 t ADT: 1,050
TR 13
FairOver: DEARCY CREEK
2.0 M N E OF KANE, Jersey, IL
Built 1977 Load: 32.4 t ADT: 50
CH 3
FairOver: UNKNOWN CREEK
0.5 MILES SOF KEMPER, Jersey, IL
Built 1978 Load: 32.4 t ADT: 275
TR 13
FairOver: PHILS CR
2MI NE KANE, Jersey, IL
Built 1978 Load: 32.4 t ADT: 50
TR 132
FairOver: MILL CREEK
3.0 MI E ELSAH, Jersey, IL
Built 1980 Load: 32.4 t ADT: 375
TR 10
FairOver: TRIB. OF MACOUPIN CK
2.3 M W KEMPER, Jersey, IL
Built 1984 Load: 32.4 t ADT: 50
TR 99
FairOver: BRANCH OF PIASA CK
1 MI S RTE 16, Jersey, IL
Built 1987 Load: 32.4 t ADT: 75
TR 94
FairOver: S. FORK OTTER CREEK
1.8MI W OTTERVILLE, Jersey, IL
Built 2003 Load: 32.4 t ADT: 225
CH 23
FairOver: TRIB TO MILL CK
2.5 Mi E of Elsah, Jersey, IL
Built 1983 Load: 32.4 t ADT: 575
TR 185
FairOver: LITTLE PIASA CREEK
4M SW BRIGHTON, Jersey, IL
Built 1982 Load: 32.4 t ADT: 50
TR 81
FairOver: OTTER CREEK
2.5 M W OTTERVILLE, Jersey, IL
Built 1995 Load: 32.4 t ADT: 100
TR 21
FairOver: DE ARCY CREEK
2.8 M N JERSEYVILLE, Jersey, IL
Built 1985 Load: 32.4 t ADT: 150
FAS 745
FairOver: PHILS CREEK
0.6 MI N ILL 16, Jersey, IL
Built 1982 Load: 32.4 t ADT: 750
CH 23
FairOver: MILL CREEK
1.25 M E OF ELSAH, Jersey, IL
Built 1984 Load: 32.4 t ADT: 575
CH 7
FairOver: OTTER CREEK
2.5 MI SW JERSEYVILL, Jersey, IL
Built 1991 Load: 32.4 t ADT: 425
MILL ST.
FairOver: CREEK
ELSAH, Jersey, IL
Built 1984 Load: 32.4 t ADT: 875
FAS 746
FairOver: DEARCY CREEK
2.0 M E OF KANE, Jersey, IL
Built 1977 Load: 34.0 t ADT: 250
ILL 16
FairOver: DRAINS TO AUTEN DTCH
1.0 M W JCT ILL 100, Jersey, IL
Built 1926 Load: 34.3 t ADT: 2,550
IL 267
FairOver: MACOUPIN CREEK
ROCK BRIDGE; CO LINE, Jersey, IL
Built 1941 Load: 34.7 t ADT: 2,150
FAS 746
FairOver: TRIB OF MACOUPIN CRE
1.2 MI W US 267, Jersey, IL
Built 1954 Load: 38.9 t ADT: 350
ILL 16 & 100
FairOver: AUTEN DITCH
1.6 MI SE CALHOUN CO, Jersey, IL
Built 1965 Load: 39.5 t ADT: 2,250
ILL 100
FairOver: BAUM BRANCH CREEK
0.1 M S JCT 16, Jersey, IL
Built 1928 Load: 39.5 t ADT: 950
ILL 100
FairOver: CHATAQUA CREEK
AT CHATAQUA, Jersey, IL
Built 1964 Load: 43.1 t ADT: 3,150
IL 100 (NB)
FairOver: PIASA CREEK
.7 MI N CLIFTON TERR, Jersey, IL
Built 1997 Load: 44.4 t ADT: 5,150
Hillview-Eldred Rd
FairOver: MACOUPIN CREEK
GREENE CO LINE, Jersey, IL
Built 1957 Load: 46.7 t ADT: 550
ILL 100
FairOver: GRAHAM HOLLOW CREEK
1.2M N GRAFTON, Jersey, IL
Built 1938 Load: 48.6 t ADT: 1,850
ILL 16
FairOver: TRIB TO BOYER CREEK
2.25 E OF FIELDON, Jersey, IL
Built 1925 Load: 49.9 t ADT: 3,750
ILL 100
FairOver: ELSAH CREEK
AT ELSAH, Jersey, IL
Built 1961 Load: 55.4 t ADT: 4,150
US 67
FairOver: DE ARCY CREEK
1.7 M N JERSEYVILLE, Jersey, IL
Built 1921 Load: 58.0 t ADT: 5,300
TR 38
FairOver: DE ARCY CREEK
2 M N OF JERSEYVILLE, Jersey, IL
Built 1980 Load: 63.5 t ADT: 675
DELHI RD/FAS 748
GoodOver: LITTLE PIASA CREEK
1.4 MI W OF BRIGHTON, Jersey, IL
Built 1975 Load: 21.4 t ADT: 1,300
FAS 745
GoodOver: MACOUPIN CR
7M NE OF JERSEYVILLE, Jersey, IL
Built 1979 Load: 32.4 t ADT: 75
TR 185
GoodOver: BRANCH OFPIASA CREEK
3M SW BRIGHTON, Jersey, IL
Built 1986 Load: 32.4 t ADT: 50
TR 199
GoodOver: MILL CREEK
1.1 MILE NE ELSAH, Jersey, IL
Built 1988 Load: 32.4 t ADT: 75
TR 27
GoodOver: SUGAR CREEK
3.3 MI. N. FIELDON, Jersey, IL
Built 1990 Load: 32.4 t ADT: 50
TR 128
GoodOver: Briggs Branch Creek
1.2 Mi E of Elsah, Jersey, IL
Built 1990 Load: 32.4 t ADT: 125
TR 56
GoodOver: TRIB PHILS CREEK
5.6 MI E. JERYSVILLE, Jersey, IL
Built 1991 Load: 32.4 t ADT: 150
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.