Total bridges
377
Public highway bridges in Ogle County
County profile · official public datasets
Ogle County, IL
377 public highway bridges tracked in the FHWA National Bridge Inventory: 46.2% rated Good, 46.2% Fair, 7.7% Poor.
- 377
- Public bridges
- 46.2%
- Good condition
- 7.7%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Ogle County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 53rd
- of 102 on Poor share
- 7.7%
- Poor-condition share
- 377
- 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.
Ogle County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Ogle County ranks #53 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.7%). Ogle County, Illinois contains 377 public highway bridges. Roughly 46.2% are rated “Good,” 46.2% “Fair,” and 7.7% “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
46.2%
174 of 377 rated 7-9
Fair condition
46.2%
174 of 377 rated 5-6
Poor condition
7.7%
29 of 377 rated 4 or below
In-state Poor-share rank
#53 of 102
Among Illinois counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 377 NBI-tracked bridges by lowest applicable component rating.
Good 46.2% (174)
Fair 46.2% (174)
Poor 7.7% (29)
Ogle County's Poor-condition bridges carry 11,200 vehicle crossings a day
That is 1.4% of the county's reported daily bridge traffic on 7.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 386 crossings a day against 906 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 377 of 377 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
32.4% of Ogle County's bridges have passed the 50-year mark
122 of the 377 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 46.2% 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 15.6% of the county's Poor-condition bridge traffic
LAKEVIEW DRIVE over KYTE CREEK, built 1963, carries 1,750 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 29-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 11,200 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Ogle County's bridges were built
377 bridges with a recorded construction year, grouped by decade
- 1920s 5
1920–1929
5 bridges
- 1930s 9
1930–1939
9 bridges
- 1940s 4
1940–1949
4 bridges
- 1950s 31
1950–1959
31 bridges
- 1960s 38
1960–1969
38 bridges
- 1970s
1970–1979
57 bridges
- 1980s
1980–1989
100 bridges
- 1990s
1990–1999
70 bridges
- 2000s 39
2000–2009
39 bridges
- 2010s 20
2010–2019
20 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 1980s, when 100 of the county's bridges still in the inventory were built, which is 26.5% 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 Ogle County compares with Illinois's closest counties by inventory size
The 5 Illinois counties nearest Ogle County in number of bridges, with their condition splits. Its 7.7% Poor share is the 2nd-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1979 is in line with the group.
Showing the 5 closest of 101 Illinois counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Ogle County (this page) | 377 | 46.2% | 46.2% | 7.7% | 1981 |
| Bureau County | 375 | 41.3% | 43.5% | 15.2% | 1978 |
| Lee County | 371 | 39.9% | 48% | 12.1% | 1980 |
| Tazewell County | 358 | 25.4% | 60.1% | 14.5% | 1976 |
| Fayette County | 357 | 56.6% | 38.4% | 5% | 1976 |
| Peoria County | 352 | 24.1% | 57.7% | 18.2% | 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 Ogle 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 Ogle County, both outside Illinois so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside IL (377 bridges here).
- Monterey County, CA · 377 bridges
- Cass County, MO · 377 bridges
- Butler County, OH · 377 bridges
- Butler County, PA · 378 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.
Fair-condition bridges (174)
I-39 & US 51 SB
FairOver: U.P. RR
0.65 MI S OF ILL 38, Ogle, IL
Built 1981 Load: 32.1 t ADT: 14,550
I-39 & US 51 NB
FairOver: U.P. RR
0.65 MI S OF ILL 38, Ogle, IL
Built 1981 Load: 32.1 t ADT: 14,550
RIVER RD
FairOver: SPRING CREEK
4.0 MI N OREGON, Ogle, IL
Built 1960 Load: 32.1 t ADT: 2,000
WHITE EAGLE RD TR6
FairOver: LEAF RIVER
1.3 MI E OF ADELINE, Ogle, IL
Built 1982 Load: 32.1 t ADT: 50
ILL 2
FairOver: SILVER CREEK
3.8 MI N JCT ILL 64, Ogle, IL
Built 1924 Load: 32.4 t ADT: 4,850
IL 72
FairOver: LEAF RIVER
.7 MI W LEAF RIVER, Ogle, IL
Built 1929 Load: 32.4 t ADT: 1,550
IL 72
FairOver: LEAF RIVER
.5 MI E LEAF RIVER, Ogle, IL
Built 1985 Load: 32.4 t ADT: 1,700
WEST GROVE RD
FairOver: BRANCH LEAF RIVER
3.0 MI SE FORRESTON, Ogle, IL
Built 1962 Load: 32.4 t ADT: 200
EGAN RD.
FairOver: MILL CREEK
5.0 N.W. BYRON, Ogle, IL
Built 1962 Load: 32.4 t ADT: 50
GALENA TRAIL RD.
FairOver: BUFFALO CREEK
0.5 MI W POLO, Ogle, IL
Built 1963 Load: 32.4 t ADT: 150
COLUMBINE ROAD
FairOver: BRANCH LEAF RIVER
3 MI SE FORRESTON, Ogle, IL
Built 1972 Load: 32.4 t ADT: 75
MOWERS RD
FairOver: BR KILLBUCK CREEK
4 MI SE LINDENWOOD, Ogle, IL
Built 1977 Load: 32.4 t ADT: 50
OREGON TRAIL ROAD
FairOver: PINE CREEK
3.0 MI SW MT MORRIS, Ogle, IL
Built 1979 Load: 32.4 t ADT: 125
BLACKHAWK ROAD
FairOver: BR KYTE CREEK
2.0 MI E DAYSVILLE, Ogle, IL
Built 1979 Load: 32.4 t ADT: 100
FORK CREEK ROAD
FairOver: BR ELKHORN CREEK
4.0 MI N BROOKVILLE, Ogle, IL
Built 1981 Load: 32.4 t ADT: 50
ELKHORN RD
FairOver: ELKHORN CR
1.0 MI E BROOKVILLE, Ogle, IL
Built 1983 Load: 32.4 t ADT: 25
ROCK CITY ROAD
FairOver: MUD CREEK
2.2 MI NE ADELINE, Ogle, IL
Built 1981 Load: 32.4 t ADT: 50
BRUSH ROAD
FairOver: MUD CREEK
3.5 MI NW ADELINE, Ogle, IL
Built 1984 Load: 32.4 t ADT: 75
CHAMBERLAIN ROAD
FairOver: KILLBUCK CREEK
3.0 M NW CRESTON, Ogle, IL
Built 1981 Load: 32.4 t ADT: 25
OAK GROVE RD - TR
FairOver: MILL CREEK
5.5 MI NW OF BYRON, Ogle, IL
Built 1982 Load: 32.4 t ADT: 25
POND RD
FairOver: MUD CREEK
N EDGE LEAF RIVER, Ogle, IL
Built 1986 Load: 32.4 t ADT: 50
GALE ROAD - TR 180
FairOver: GALE CREEK
2.0 MI W OF OREGON, Ogle, IL
Built 1982 Load: 32.4 t ADT: 125
OAK GROVE RD
FairOver: BR EAST FORK
3.5 MI N OF BYRON, Ogle, IL
Built 1994 Load: 32.4 t ADT: 25
MARRILL RD
FairOver: BLACK WALNUT CR
5 M SW STILLMAN VALL, Ogle, IL
Built 1984 Load: 32.4 t ADT: 275
ROCK ROAD
FairOver: MUD CREEK
2.5 M E MT MORRIS, Ogle, IL
Built 1983 Load: 32.4 t ADT: 175
HALDANE ROAD
FairOver: BR. PINE CREEK
4.3 MI E OF HALDANE, Ogle, IL
Built 1984 Load: 32.4 t ADT: 125
POND ROAD
FairOver: LEAF RIVER
2.5 W LEAF RIVER, Ogle, IL
Built 1985 Load: 32.4 t ADT: 50
EDGEWOOD ROAD
FairOver: BR. OF PINE CREEK
3 MI NE OF WOOSUNG, Ogle, IL
Built 1987 Load: 32.4 t ADT: 100
SPRUCE ROAD
FairOver: SEVEN MILE BRANCH
2.5 MI SE OF POLO, Ogle, IL
Built 1987 Load: 32.4 t ADT: 25
BROOKVILLE ROAD
FairOver: BR OF ELKHORN CR
3.4 MI N BROOKVILLE, Ogle, IL
Built 1986 Load: 32.4 t ADT: 25
GILLIS ROAD
FairOver: KILBUCK CREEK
3.2 MI N CRESTON, Ogle, IL
Built 1990 Load: 32.4 t ADT: 50
MC GREGER ROAD
FairOver: UNNAMED STREAM
5 MI. NE. OF BYRON, Ogle, IL
Built 1991 Load: 32.4 t ADT: 200
CANADA RD
FairOver: TRIB. OF PINE CREEK
4 MI W OF MT MORRIS, Ogle, IL
Built 1998 Load: 32.4 t ADT: 25
EDSON ROAD
FairOver: S BR KISHWAUKEE RIV.
6.2 MI NE MONROE CTR, Ogle, IL
Built 1993 Load: 32.4 t ADT: 100
TWOMBLY ROAD
FairOver: KILBUCK CREEK
1.5 MI NE CRESTON, Ogle, IL
Built 1993 Load: 32.4 t ADT: 75
SILVER CREEK ROAD
FairOver: LEAF RIVER
2.0 MI SE LEAF RIVER, Ogle, IL
Built 2001 Load: 32.4 t ADT: 50
HUSKING PEG RD
FairOver: BR. KYTE CREEK
2.5 MI S CHANA, Ogle, IL
Built 2001 Load: 32.4 t ADT: 100
STEWARD RD
FairOver: BNSF RAILROAD
1.2MI E OF IL251, Ogle, IL
Built 2010 Load: 32.4 t ADT: 2,350
BURLINGTON RD
FairOver: BNSF RAILROAD
.29MI S PINES RD, Ogle, IL
Built 2007 Load: 32.4 t ADT: 25
COLUMBINE RD
FairOver: BRANCH LEAF RIVER
1.8 M NE FORRESTON, Ogle, IL
Built 1976 Load: 32.4 t ADT: 100
MOWERS RD
FairOver: BR KILBUCK CREEK
.6 MI E LYNNVILLE RD, Ogle, IL
Built 1976 Load: 32.4 t ADT: 50
MOWERS ROAD
FairOver: BR. KILBUCK CREEK
5 MI. SE. LINDENWOOD, Ogle, IL
Built 1992 Load: 32.4 t ADT: 50
SOUTH MAIN ST
FairOver: KYTE CREEK
IN ROCHELLE, Ogle, IL
Built 1990 Load: 32.4 t ADT: 1,850
DEMENT ROAD
FairOver: UP RR & RILEY DITCH
SW SEC 20 T40N R2E, Ogle, IL
Built 2001 Load: 32.4 t ADT: 1,950
WH. PINES PK RD /O
FairOver: PINES CREEK
.14 MI N. PINES ROAD, Ogle, IL
Built 1984 Load: 32.4 t ADT: 200
ILL ROUTE 26
FairOver: FIVE MILE CREEK
5 MI N OF POLO, Ogle, IL
Built 1974 Load: 32.7 t ADT: 1,850
PECATONICA RD
FairOver: DM&E RR
2.5 MI E LEAF RIVER, Ogle, IL
Built 1957 Load: 32.7 t ADT: 850
I-39 & US 51
FairOver: STREAM
1.75 MI S OF IL 64, Ogle, IL
Built 1981 Load: 33.4 t ADT: 29,600
SILVER CREEK ROAD
FairOver: SILVER CREEK
4.0 MI SE LEAF RIVER, Ogle, IL
Built 1982 Load: 33.4 t ADT: 50
COLUMBINE ROAD
FairOver: BR. LEAF RIVER
2.0 NE FOR RESTON, Ogle, IL
Built 1978 Load: 34.0 t ADT: 100
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.