Total bridges
173
Public highway bridges in Henry County
County profile · official public datasets
Henry County, IA
173 public highway bridges tracked in the FHWA National Bridge Inventory: 41% rated Good, 37.6% Fair, 21.4% Poor.
- 173
- Public bridges
- 41%
- Good condition
- 21.4%
- 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.
- 59th
- of 99 on Poor share
- 21.4%
- Poor-condition share
- 173
- public highway bridges
- 1982
- 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 #59 of 99 Iowa counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 21.4%). Henry County, Iowa contains 173 public highway bridges. Roughly 41% are rated “Good,” 37.6% “Fair,” and 21.4% “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
41%
71 of 173 rated 7-9
Fair condition
37.6%
65 of 173 rated 5-6
Poor condition
21.4%
37 of 173 rated 4 or below
In-state Poor-share rank
#59 of 99
Among Iowa counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 173 NBI-tracked bridges by lowest applicable component rating.
Good 41% (71)
Fair 37.6% (65)
Poor 21.4% (37)
Henry County's Poor-condition bridges carry 9,479 vehicle crossings a day
That is 4.5% of the county's reported daily bridge traffic on 21.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 256 crossings a day against 1,525 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 173 of 173 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
38.7% of Henry County's bridges have passed the 50-year mark
67 of the 173 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 41% 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 30.9% of the county's Poor-condition bridge traffic
235TH STREET over BIG CREEK, built 1957, carries 2,930 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 37-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 9,479 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
173 bridges with a recorded construction year, grouped by decade
- 1910s 6
1910–1919
6 bridges
- 1920s 2
1920–1929
2 bridges
- 1930s 4
1930–1939
4 bridges
- 1950s
1950–1959
22 bridges
- 1960s
1960–1969
21 bridges
- 1970s
1970–1979
24 bridges
- 1980s
1980–1989
19 bridges
- 1990s 13
1990–1999
13 bridges
- 2000s
2000–2009
41 bridges
- 2010s
2010–2019
17 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 2000s, when 41 of the county's bridges still in the inventory were built, which is 23.7% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year (1982) matches the Iowa average (1979).
How Henry County compares with Iowa's closest counties by inventory size
The 5 Iowa counties nearest Henry County in number of bridges, with their condition splits. Its 21.4% Poor share is the 4th-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1977 is 5 years newer.
Showing the 5 closest of 98 Iowa counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Fremont County | 179 | 33% | 47.5% | 19.6% | 1977 |
| Des Moines County | 176 | 40.9% | 42.6% | 16.5% | 1978 |
| Henry County (this page) | 173 | 41% | 37.6% | 21.4% | 1982 |
| Union County | 169 | 30.2% | 37.3% | 32.5% | 1978 |
| Clarke County | 168 | 27.4% | 41.1% | 31.5% | 1977 |
| Greene County | 168 | 35.1% | 50% | 14.9% | 1973 |
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 Iowa so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside IA (173 bridges here).
- Coweta County, GA · 173 bridges
- Somerset County, ME · 173 bridges
- Johnson County, NE · 173 bridges
- Merrick County, NE · 173 bridges
Similar average build year
Nearest mean year-built outside IA (1982 here).
- Oklahoma County, OK · avg 1982 · 1,216 bridges
- Jackson County, MO · avg 1982 · 930 bridges
- Milwaukee County, WI · avg 1982 · 893 bridges
- Champaign County, IL · avg 1982 · 727 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (71)
LOCAL ROAD
GoodOver: DICKEY BR.
070060105, Henry, IA
Built 2007 Load: 19.1 t ADT: 11
LOCAL
GoodOver: BR FISH CREEK
070062004, Henry, IA
Built 2002 Load: 20.5 t ADT: 5
BENTON AVE
GoodOver: MUD CREEK
070073208, Henry, IA
Built 2005 Load: 22.2 t ADT: 11
LOCAL
GoodOver: BIG CEDAR CREEK
071073303, Henry, IA
Built 1978 Load: 24.9 t ADT: 113
US 218 SB
GoodOver: BIG CREEK
1.3 mi. N of N Jct. US 34, Henry, IA
Built 1968 Load: 28.6 t ADT: 6,050
US 34 IA 163 EB
GoodOver: SKUNK RIVER
3.8 mi. E of Jct. SR W40, Henry, IA
Built 2022 Load: 32.4 t ADT: 3,800
US 218 IA 27 NB
GoodOver: SKUNK RIVER
4.7 MI. S OF S JCT US 218, Henry, IA
Built 2019 Load: 32.4 t ADT: 4,850
J20 SALEM RD
GoodOver: MUD CREEK
070052705, Henry, IA
Built 2019 Load: 32.4 t ADT: 400
ASH AVE
GoodOver: ROCK CREEK
70071806, Henry, IA
Built 2016 Load: 32.4 t ADT: 62
OASIS AVE
GoodOver: SOUTH BIG CREEK
071051002, Henry, IA
Built 2014 Load: 32.4 t ADT: 60
W55 FRANKLIN AVE
GoodOver: BNSF RR
071070110, Henry, IA
Built 2019 Load: 32.4 t ADT: 920
LOCAL
GoodOver: FISH CREEK
070060706, Henry, IA
Built 1993 Load: 32.7 t ADT: 41
LEXINGTON AVE
GoodOver: DRAINAGE DITCH
070061306, Henry, IA
Built 2011 Load: 32.7 t ADT: 140
FREEMONT AVE
GoodOver: FISH CREEK
700618, Henry, IA
Built 2011 Load: 32.7 t ADT: 47
OLD HIGHWAY 34
GoodOver: SKUNK RIVER
071070301, Henry, IA
Built 2000 Load: 32.7 t ADT: 450
HENRYJEFFERSON AVE
GoodOver: STREAM
071070702, Henry, IA
Built 2022 Load: 32.7 t ADT: 26
HENRY JEFF AVE
GoodOver: BERRY BRANCH
071071902, Henry, IA
Built 2017 Load: 32.7 t ADT: 20
LOCAL
GoodOver: NORTH BRANCH BIG CREEK
072052904, Henry, IA
Built 1979 Load: 32.7 t ADT: 51
270TH ST
GoodOver: BRANCH OF BRUSH CREEK
071053201, Henry, IA
Built 2022 Load: 32.7 t ADT: 26
US 34 EB US 218 SB
GoodOver: BNSF RR
0.3 mi. W of E Jct.US 218, Henry, IA
Built 2001 Load: 32.7 t ADT: 4,400
JEWEL AVE
GoodOver: US 218
3.0 mi. N of S Jct. US 34, Henry, IA
Built 2000 Load: 32.7 t ADT: 140
US 218 RAMP E
GoodOver: US 218
2.7 mi. N of S Jct US 34, Henry, IA
Built 2001 Load: 33.0 t ADT: 3,430
US 34 EB
GoodOver: BIG CREEK
0.7 mi. E of Jct. SR W55, Henry, IA
Built 2002 Load: 34.5 t ADT: 2,900
LOCAL
GoodOver: BIG CREEK
072063404, Henry, IA
Built 1985 Load: 34.7 t ADT: 140
US 34 EB
GoodOver: W 55
3.6 mi. W of W Jct US 218, Henry, IA
Built 2002 Load: 34.9 t ADT: 2,700
US 34 WB
GoodOver: W 55
3.6 mi. W of W Jct US 218, Henry, IA
Built 2002 Load: 34.9 t ADT: 2,700
H38 220TH ST
GoodOver: LAWRENCE CREEK
071050501, Henry, IA
Built 2022 Load: 35.3 t ADT: 960
H18 140TH ST
GoodOver: LYNN CREEK
073063001, Henry, IA
Built 2016 Load: 35.3 t ADT: 80
FM
GoodOver: WOLF CREEK
071070802, Henry, IA
Built 1984 Load: 35.6 t ADT: 120
US 34 WB
GoodOver: BIG CREEK
0.7 mi. E of Jct. SR W55, Henry, IA
Built 2002 Load: 35.7 t ADT: 2,900
WINFIELD AVE
GoodOver: US 34/218
1.5 mi. W of E Jct.US 218, Henry, IA
Built 2001 Load: 36.1 t ADT: 1,290
US 34 EB
GoodOver: OLD 34
0.4 mi. W of Jct. SR W55, Henry, IA
Built 2002 Load: 37.1 t ADT: 2,700
US 34 WB
GoodOver: OLD 34
0.4 mi. W of Jct. SR W55, Henry, IA
Built 2002 Load: 37.1 t ADT: 2,700
FM
GoodOver: PHILLIPS CREEK
073061204, Henry, IA
Built 1983 Load: 37.6 t ADT: 30
US 34 EB
GoodOver: HICKORY AVE
1.6 mi. E of Jct. SR W55, Henry, IA
Built 2002 Load: 38.4 t ADT: 2,900
US 34 WB
GoodOver: HICKORY AVE
1.6 mi. E of Jct. SR W55, Henry, IA
Built 2002 Load: 38.4 t ADT: 2,900
US 218 SB
GoodOver: SOUTH BR OF FISH CREEK
0.7 mi. N of Jct. SR J20, Henry, IA
Built 2003 Load: 38.5 t ADT: 4,850
US 34 WB
GoodOver: IOWA AVE
0.6 mi. W of W Jct US 218, Henry, IA
Built 2002 Load: 38.7 t ADT: 2,900
US 34 EB
GoodOver: IOWA AVE
0.6 mi. W of W Jct US 218, Henry, IA
Built 2002 Load: 38.7 t ADT: 2,900
S IRIS ST
GoodOver: US 218
0.4 mi. S of S Jct. US 34, Henry, IA
Built 2001 Load: 39.5 t ADT: 830
FM
GoodOver: BNSF RR
071070501, Henry, IA
Built 2003 Load: 39.6 t ADT: 270
US 218 NB
GoodOver: BNSF RR
0.3 mi. W of E Jct US 218, Henry, IA
Built 2001 Load: 39.7 t ADT: 4,400
X13 MARSH AVE
GoodOver: SOUTH BIG CREEK
072053104, Henry, IA
Built 2015 Load: 39.9 t ADT: 120
US 34 IA 163 WB
GoodOver: BNSF
0.3 mi. W of E Jct. 218, Henry, IA
Built 2001 Load: 39.9 t ADT: 1,930
312TH ST
GoodOver: MUD CREEK
070052203, Henry, IA
Built 2011 Load: 40.0 t ADT: 80
LOCAL ROAD
GoodOver: GREEN CREEK
072072107, Henry, IA
Built 2010 Load: 40.0 t ADT: 35
255TH STREET
GoodOver: U.S. 218
1.8 mi. S of S Jct. US 34, Henry, IA
Built 2001 Load: 40.0 t ADT: 860
H46 260TH ST
GoodOver: BERRY BRANCH CREEK
071073001, Henry, IA
Built 2019 Load: 40.2 t ADT: 70
US 218 NB
GoodOver: BIG CREEK
1.3 mi. N of S Jct. US 34, Henry, IA
Built 2000 Load: 40.3 t ADT: 6,050
US 218 SB
GoodOver: NORTH BRANCH FISH CREEK
1.1 mi. N of Jct. SR J-20, Henry, IA
Built 2003 Load: 40.3 t ADT: 4,850
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.