Total bridges
193
Public highway bridges in Jo Daviess County
County profile · official public datasets
Jo Daviess County, IL
193 public highway bridges tracked in the FHWA National Bridge Inventory: 46.1% rated Good, 44% Fair, 9.8% Poor.
- 193
- Public bridges
- 46.1%
- Good condition
- 9.8%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Jo Daviess County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- 69th
- of 102 on Poor share
- 9.8%
- Poor-condition share
- 193
- public highway bridges
- 1973
- 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.
Jo Daviess County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Jo Daviess County ranks #69 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.8%). Jo Daviess County, Illinois contains 193 public highway bridges. Roughly 46.1% are rated “Good,” 44% “Fair,” and 9.8% “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
46.1%
89 of 193 rated 7-9
Fair condition
44%
85 of 193 rated 5-6
Poor condition
9.8%
19 of 193 rated 4 or below
In-state Poor-share rank
#69 of 102
Among Illinois counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 193 NBI-tracked bridges by lowest applicable component rating.
Good 46.1% (89)
Fair 44% (85)
Poor 9.8% (19)
Jo Daviess County's Poor-condition bridges carry 8,525 vehicle crossings a day
That is 5% of the county's reported daily bridge traffic on 9.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 449 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 193 of 193 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
43% of Jo Daviess County's bridges have passed the 50-year mark
83 of the 193 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 46.1% 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 44.6% of the county's Poor-condition bridge traffic
US 20 over RUSH CREEK, built 1971, carries 3,800 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 19-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 8,525 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Jo Daviess County's bridges were built
193 bridges with a recorded construction year, grouped by decade
- pre-1900 1
Built before 1900
1 bridges
- 1900s 6
1900–1909
6 bridges
- 1910s 6
1910–1919
6 bridges
- 1920s 11
1920–1929
11 bridges
- 1930s 7
1930–1939
7 bridges
- 1940s 4
1940–1949
4 bridges
- 1950s
1950–1959
18 bridges
- 1960s
1960–1969
23 bridges
- 1970s 15
1970–1979
15 bridges
- 1980s
1980–1989
41 bridges
- 1990s
1990–1999
27 bridges
- 2000s 15
2000–2009
15 bridges
- 2010s 15
2010–2019
15 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 1980s, when 41 of the county's bridges still in the inventory were built, which is 21.2% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1973, 6 years older than the Illinois average of 1979.
How Jo Daviess County compares with Illinois's closest counties by inventory size
The 5 Illinois counties nearest Jo Daviess County in number of bridges, with their condition splits. Its 9.8% Poor share is the 6th-lowest of these 6. Its average build year of 1973 against a peer-group mean of 1981 is 8 years older.
Showing the 5 closest of 101 Illinois counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Warren County | 199 | 69.3% | 23.1% | 7.5% | 1985 |
| Crawford County | 197 | 33% | 60.9% | 6.1% | 1983 |
| Jo Daviess County (this page) | 193 | 46.1% | 44% | 9.8% | 1973 |
| De Witt County | 192 | 57.3% | 37% | 5.7% | 1980 |
| Union County | 192 | 54.7% | 41.7% | 3.6% | 1981 |
| Clinton County | 190 | 56.3% | 36.3% | 7.4% | 1976 |
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 Jo Daviess 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 Jo Daviess County, both outside Illinois so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside IL (193 bridges here).
- Cecil County, MD · 193 bridges
- Blue Earth County, MN · 193 bridges
- Jasper County, MS · 193 bridges
- Cooper County, MO · 193 bridges
Similar average build year
Nearest mean year-built outside IL (1973 here).
- Jefferson County, AL · avg 1973 · 1,068 bridges
- Erie County, NY · avg 1973 · 906 bridges
- Davidson County, TN · avg 1973 · 832 bridges
- Lancaster County, PA · avg 1973 · 801 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (85)
E HOWARDVILLE ROAD
FairOver: YELLOW CREEK
3MILES NE STOCKTON, Jo Daviess, IL
Built 1975 Load: 32.4 t ADT: 250
EAST BETHEL ROAD
FairOver: RUSH CREEK
4.5 M SE ELIZEBTH, Jo Daviess, IL
Built 1976 Load: 32.4 t ADT: 200
NORTH MINER ROAD
FairOver: BR OF GALENA RIVER
2 MILES E GALENA, Jo Daviess, IL
Built 1977 Load: 32.4 t ADT: 50
N TIGER WHIP ROAD
FairOver: YELLOW CREEK
4 MI NE STOCKTON, Jo Daviess, IL
Built 1978 Load: 32.4 t ADT: 100
TOWNSHIP ROAD 28
FairOver: MAZELLE CREEK
5 MI NW HANOVER, Jo Daviess, IL
Built 1978 Load: 32.4 t ADT: 100
SKENE ROAD
FairOver: RUSH CREEK
1.5 M NE DERINDA CEN, Jo Daviess, IL
Built 1980 Load: 32.4 t ADT: 75
S IRISH HOLLOW ROA
FairOver: IRISH HOLLOW CREEK
4.5 M W OF ELIZABETH, Jo Daviess, IL
Built 1983 Load: 32.4 t ADT: 75
TR 80
FairOver: APPLE RIVER
3 MI SO OF HANOVER, Jo Daviess, IL
Built 1985 Load: 32.4 t ADT: 75
WEST CULVERT ROAD
FairOver: E FORK GALENA RIVER
2.5 M W SCALES MOUND, Jo Daviess, IL
Built 1981 Load: 32.4 t ADT: 75
HILL ROAD (TR 237)
FairOver: LITTLE RUSH CREEK
4 MI. SE. OF HANOVER, Jo Daviess, IL
Built 1987 Load: 32.4 t ADT: 25
WEST BUCKHILL ROAD
FairOver: GALENA RIVER
1.5 MI NE GALENA, Jo Daviess, IL
Built 1986 Load: 32.4 t ADT: 75
N. BIRKBECK ROAD
FairOver: GALENA RIVER
4.5 MI N OF GALENA, Jo Daviess, IL
Built 1988 Load: 32.4 t ADT: 50
N BROADWAY ROAD
FairOver: W FK OF APPLE RIVER
2 MI S APPLE RIVER, Jo Daviess, IL
Built 1981 Load: 34.3 t ADT: 25
US 20 AND ILL 84
FairOver: SMALLPOX CREEK
3.8 MI SE OF GALENA, Jo Daviess, IL
Built 1971 Load: 34.7 t ADT: 5,750
TOWNSHIP RD NO 146
FairOver: BR OF HELLS CREEK
1 MI SO SCHAPVILLE, Jo Daviess, IL
Built 1964 Load: 35.0 t ADT: 125
ILL RT 78
FairOver: MUDDY PLUM RIVER
2.5 MI N CARROLL CO., Jo Daviess, IL
Built 1982 Load: 35.3 t ADT: 600
US 20
FairOver: APPLE RIVER
2 MI. W. ELIZABETH, Jo Daviess, IL
Built 1925 Load: 35.6 t ADT: 4,550
US 20 AND IL 84
FairOver: GALENA RIV AND ICGRR
IN GALENA, Jo Daviess, IL
Built 1984 Load: 36.6 t ADT: 8,250
CANYON PARK RD
FairOver: S. FORK APPLE RIVER
4 MI. SW. OF WARREN, Jo Daviess, IL
Built 1995 Load: 36.9 t ADT: 225
CANYON ROAD
FairOver: BIRCH CREEK
4 MI. W. OF NORA, Jo Daviess, IL
Built 1994 Load: 38.9 t ADT: 125
CANYON ROAD
FairOver: WOLF CREEK
1.4 MI W OF IL 78, Jo Daviess, IL
Built 1990 Load: 39.5 t ADT: 250
FAP 650 - IL 78
FairOver: TRIB S FK APPLE RIV.
4.4 MI. N. US 20, Jo Daviess, IL
Built 1991 Load: 41.1 t ADT: 1,550
CANYON ROAD
FairOver: APPLE RIVER
4 MI. W. OF IL 78, Jo Daviess, IL
Built 1995 Load: 41.1 t ADT: 150
ILL RT 78
FairOver: HAMMOND BR PLUM RIV.
4.3 MI S OF US 20, Jo Daviess, IL
Built 1982 Load: 43.1 t ADT: 700
FAP 650 - IL 78
FairOver: S FORK APPLE RIVER
4.2 MI. N. US 20, Jo Daviess, IL
Built 1991 Load: 45.0 t ADT: 1,550
US 20 WB
FairOver: SINSINAWA RIVER
2 MI. W. OF IL 84, Jo Daviess, IL
Built 1993 Load: 51.5 t ADT: 8,650
US 20 WB
FairOver: MENOMINEE RD
3.2 MI W JCT ILL 84, Jo Daviess, IL
Built 1968 Load: 51.8 t ADT: 10,900
ILL RT 84
FairOver: APPLE RIVER TRIB.
2.0 MI S. HANOVER, Jo Daviess, IL
Built 2011 Load: 52.5 t ADT: 1,200
ILL RT 84
FairOver: APPLE RIVER
IN HANOVER, Jo Daviess, IL
Built 2014 Load: 52.5 t ADT: 2,100
US20 EB
FairOver: LITTLE MENOMINEE RIV
4.8 MI W JCT ILL84, Jo Daviess, IL
Built 1965 Load: 60.3 t ADT: 10,900
US20 WB
FairOver: LITTLE MENOMINEE RIV
4.8 MI W JCT ILL84, Jo Daviess, IL
Built 1965 Load: 60.3 t ADT: 10,900
US 20 EB
FairOver: MENOMINEE RIVER
3.8 MI E JCT ILL 35, Jo Daviess, IL
Built 1964 Load: 61.9 t ADT: 9,450
US 20 WB
FairOver: MENOMINEE RIVER
3.8 MI E JCT ILL 35, Jo Daviess, IL
Built 1964 Load: 61.9 t ADT: 9,450
US 20 EB
FairOver: SINSINAWA RIVER
2.0 MI W JCT ILL84, Jo Daviess, IL
Built 1966 Load: 63.8 t ADT: 8,650
MEEKER STREET
FairOver: HUGHLETTS BRANCH
CENTER OF GALENA, Jo Daviess, IL
Built 1987 Load: 89.1 t ADT: 2,650
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.