Total bridges
328
Public highway bridges in Henry County
County profile · official public datasets
Henry County, IL
328 public highway bridges tracked in the FHWA National Bridge Inventory: 49.4% rated Good, 39.6% Fair, 11% Poor.
- 328
- Public bridges
- 49.4%
- Good condition
- 11%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Henry County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 79th
- of 102 on Poor share
- 11%
- Poor-condition share
- 328
- 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.
Henry County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Henry County ranks #79 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11%). Henry County, Illinois contains 328 public highway bridges. Roughly 49.4% are rated “Good,” 39.6% “Fair,” and 11% “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
49.4%
162 of 328 rated 7-9
Fair condition
39.6%
130 of 328 rated 5-6
Poor condition
11%
36 of 328 rated 4 or below
In-state Poor-share rank
#79 of 102
Among Illinois counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 328 NBI-tracked bridges by lowest applicable component rating.
Good 49.4% (162)
Fair 39.6% (130)
Poor 11% (36)
Henry County's Poor-condition bridges carry 76,285 vehicle crossings a day
That is 10.8% of the county's reported daily bridge traffic on 11% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 2,119 crossings a day against 833 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 327 of 328 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
39.6% of Henry County's bridges have passed the 50-year mark
130 of the 328 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 49.4% 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 14.2% of the county's Poor-condition bridge traffic
FAI 80 SB over CLEVELAND RD/FAP595, built 1965, carries 10,800 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 36-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 76,285 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Henry County's bridges were built
328 bridges with a recorded construction year, grouped by decade
- pre-1900 1
Built before 1900
1 bridges
- 1900s 1
1900–1909
1 bridges
- 1910s 2
1910–1919
2 bridges
- 1920s 4
1920–1929
4 bridges
- 1930s 15
1930–1939
15 bridges
- 1940s 10
1940–1949
10 bridges
- 1950s 12
1950–1959
12 bridges
- 1960s
1960–1969
82 bridges
- 1970s 22
1970–1979
22 bridges
- 1980s
1980–1989
61 bridges
- 1990s
1990–1999
62 bridges
- 2000s
2000–2009
36 bridges
- 2010s 19
2010–2019
19 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 1960s, when 82 of the county's bridges still in the inventory were built, which is 25% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1978) matches the Illinois average (1979).
How Henry County compares with Illinois's closest counties by inventory size
The 5 Illinois counties nearest Henry County in number of bridges, with their condition splits. Its 11% Poor share is the 5th-lowest of these 6. Its average build year of 1978 against a peer-group mean of 1978 is in line with the group.
Showing the 5 closest of 101 Illinois counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Kane County | 336 | 48.2% | 45.5% | 6.3% | 1986 |
| Shelby County | 335 | 56.4% | 36.4% | 7.2% | 1978 |
| Pike County | 330 | 23.9% | 66.1% | 10% | 1979 |
| Henry County (this page) | 328 | 49.4% | 39.6% | 11% | 1978 |
| Christian County | 321 | 16.2% | 67% | 16.8% | 1969 |
| Adams County | 319 | 40.4% | 53.6% | 6% | 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 Henry 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 Henry County, both outside Illinois so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside IL (328 bridges here).
- Nassau County, NY · 328 bridges
- Jones County, MS · 329 bridges
- Knox County, NE · 329 bridges
- Mercer County, OH · 329 bridges
Similar average build year
Nearest mean year-built outside IL (1978 here).
- Orange County, CA · avg 1978 · 1,164 bridges
- Sumner County, KS · avg 1978 · 659 bridges
- Allen County, IN · avg 1978 · 613 bridges
- Buncombe County, NC · avg 1978 · 555 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (328)
TR-257
FairOver: SPRING CREEK
1200N/1680E, Henry, IL
Built 1947 Load: 10.7 t ADT: 25
TR 201(1550 N)
FairOver: BNSF RR
2 MI N ORION, Henry, IL
Built 1945 Load: 14.6 t ADT: 75
FAS 2224
FairOver: BNSF RR
SOUTH OF ORION, Henry, IL
Built 1930 Load: 16.2 t ADT: 550
TR 297
FairOver: WALKER CREEK
2.0 MI NW KEWANEE, Henry, IL
Built 1940 Load: 17.5 t ADT: 50
CH 19 FAS 240
FairOver: EDWARDS R. TRIB.
2 1/2 MI. S. ANDOVER, Henry, IL
Built 1950 Load: 17.5 t ADT: 350
TOWNSHIP RD NO 143
FairOver: MUD CREEK
4.0 MI E ATKINSON, Henry, IL
Built 1940 Load: 19.1 t ADT: 75
C.H. 5 FAS 232
FairOver: MUD CR. TRIBUTARY
31/2 MI. S. ATKINSON, Henry, IL
Built 1948 Load: 19.4 t ADT: 1,500
TR382B
FairOver: ACME DITCH
7 MI. S.E. ATKINSON, Henry, IL
Built 1949 Load: 19.4 t ADT: 75
TR 274
FairOver: EDWARDS RIVER
7.0 MI SE CAMBRIDGE, Henry, IL
Built 1968 Load: 20.1 t ADT: 10
TR 4
FairOver: N POPE CR
1.5 M SE NEW WINDSOR, Henry, IL
Built 1958 Load: 20.4 t ADT: 200
TR 172
FairOver: FAI 80
1.0 MI W OF GENESEO, Henry, IL
Built 1961 Load: 22.7 t ADT: 300
TR 196-D
FairOver: FAI 80
.34 MI E GENESEO, Henry, IL
Built 1961 Load: 23.3 t ADT: 275
I-74 & 280
FairOver: DRAINAGE DITCH
2 MI E RI CO LINE, Henry, IL
Built 1962 Load: 23.3 t ADT: 15,000
CAMBRIDGE RD/FAS23
FairOver: FAI 80
4.0 MI W JCT ILL 82, Henry, IL
Built 1961 Load: 24.0 t ADT: 650
I 74
FairOver: CAMP CREEK
.25MI N 1200N, Henry, IL
Built 1966 Load: 24.3 t ADT: 14,800
TR 6-A
FairOver: BR. OF COAL CREEK
4.0 MI NW ORION, Henry, IL
Built 1910 Load: 24.3 t ADT: 50
TR 130
FairOver: EDWARDS RIVER
4.0 MI SW CAMBRIDGE, Henry, IL
Built 1924 Load: 24.3 t ADT: 50
W ELK STREET
FairOver: GENESEO CREEK
NW CORNER OF GENESEO, Henry, IL
Built 1938 Load: 24.3 t ADT: 550
IL 92
FairOver: ROCK RIVER
HENRY/ROCK IS. CO LN, Henry, IL
Built 1997 Load: 24.9 t ADT: 2,200
TR 216
FairOver: OAT CREEK
2 MI SE GENESEO, Henry, IL
Built 1961 Load: 25.9 t ADT: 150
TR 122
FairOver: FAI 80
4.5 MI W OF GENESEO, Henry, IL
Built 1961 Load: 26.2 t ADT: 150
TR 216
FairOver: FAI 80
2.5 MI SE OF GENESEO, Henry, IL
Built 1961 Load: 27.2 t ADT: 150
TR 330
FairOver: FAI 80
1 MI W ATKINSON RD, Henry, IL
Built 1961 Load: 27.2 t ADT: 325
TR 468
FairOver: FAI 80
1.5 MI E JCT ILL 78, Henry, IL
Built 1961 Load: 27.2 t
TR149
FairOver: FAI 74
1.0 MI S JCT I80, Henry, IL
Built 1965 Load: 27.9 t ADT: 75
ULAH ROAD
FairOver: EDWARDS RIVER
1.2 MI S JCT ILL 81, Henry, IL
Built 1933 Load: 28.2 t ADT: 150
ILL 84
FairOver: ROCK RIVER
AT ROCK ISLAND CO LN, Henry, IL
Built 1981 Load: 28.5 t ADT: 12,400
I-80
FairOver: DRAINAGE DITCH
1.55 MI E JCT ILL 78, Henry, IL
Built 1962 Load: 28.5 t ADT: 17,900
TR 400 A
FairOver: FAI 80
2.8 MI W JCT ILL 78, Henry, IL
Built 1962 Load: 29.2 t ADT: 75
TR 376
FairOver: FAI 80
1.8 MI E ATKINSON RD, Henry, IL
Built 1962 Load: 29.8 t ADT: 200
TR 297
FairOver: EDWARDS RIVER
4.0 MI NW KEWANEE, Henry, IL
Built 1959 Load: 29.8 t ADT: 75
TR 251
FairOver: FAI 74
2 MI. N. OF IL81, Henry, IL
Built 1966 Load: 31.4 t ADT: 75
US RTE 6
FairOver: CREEK
.42MI NW OF 2900E, Henry, IL
Built 1953 Load: 32.4 t ADT: 1,200
CH 15 FAS 227
FairOver: GREEN RIVER
1.5 MI E COLONA, Henry, IL
Built 1976 Load: 32.4 t ADT: 1,450
TR 420-B
FairOver: MUD CREEK
1.0 MI W ANNAWAN, Henry, IL
Built 1978 Load: 32.4 t ADT: 75
CH 9
FairOver: EDWARDS RIVER
1.5 MI S OF ANDOVER, Henry, IL
Built 1983 Load: 32.4 t ADT: 625
TR 395-A
FairOver: INDIAN CREEK
4.0 MI S KEWANEE, Henry, IL
Built 1979 Load: 32.4 t ADT: 75
TR 345 B
FairOver: S. EDWARDS RIVER
4.5 MI SE ANDOVER, Henry, IL
Built 1980 Load: 32.4 t ADT: 75
TR 400
FairOver: MUD CREEK
4.0 MI SW ANNAWAN, Henry, IL
Built 1981 Load: 32.4 t ADT: 75
TR 276
FairOver: OAT CREEK
2.5 MI NW ATKINSON, Henry, IL
Built 1981 Load: 32.4 t ADT: 25
TR 412
FairOver: GREEN RIVER
3.0 MI SW HOOPPOLE, Henry, IL
Built 1982 Load: 32.4 t ADT: 50
TR 298
FairOver: BR OF EDWARDS RIVER
6.5 MI NE BISHOP HIL, Henry, IL
Built 1980 Load: 32.4 t ADT: 25
TR 238
FairOver: GREEN RIVER
2.0 MI NE GENESEO, Henry, IL
Built 1984 Load: 32.4 t ADT: 25
GRANGE ROAD
FairOver: GREEN RIVER
0.5 MI N OF GENESEO, Henry, IL
Built 1984 Load: 32.4 t ADT: 1,600
TR 121
FairOver: GENESEO CREEK
WEST EDGE GENESEO, Henry, IL
Built 1986 Load: 32.4 t ADT: 175
TR 265
FairOver: BR OF CAMP CREEK
2.5 M S OF ORION, Henry, IL
Built 1986 Load: 32.4 t ADT: 25
TR 362
FairOver: MUD CREEK
5.5 MI W SAUK TRAIL, Henry, IL
Built 1987 Load: 32.4 t ADT: 25
TR 154
FairOver: GREEN RIVER
2280N 1200E, Henry, IL
Built 1996 Load: 32.4 t ADT: 800
TR 385
FairOver: INDIAN CREEK
3 MI. S. OF KEWANEE, Henry, IL
Built 1993 Load: 32.4 t ADT: 75
TR 157
FairOver: BR. GENESEO CREEK
1.25 MI. W. OF IL 82, Henry, IL
Built 1994 Load: 32.4 t ADT: 225
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.