Calhoun County, IA

171 public highway bridges

Calhoun County Bridge Snapshot

Calhoun County, Iowa contains 171 public highway bridges in the FHWA National Bridge Inventory. Roughly 24% are rated “Good,” 49.1% “Fair,” 25.7% “Poor,” and 25.7% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in IA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

171
Total Bridges
24%
Good
25.7%
Poor
25.7%
Structurally Deficient

Condition Distribution

Good
24% (41)
Fair
49.1% (84)
Poor
25.7% (44)
SD
25.7% (44)

All Bridges (171)

LOCAL

Fair

Over: DD#6

088330704, Calhoun, IA

Built 1974 Load: 32.7 t ADT: 45

LOCAL

Fair

Over: D.D.

088341101, Calhoun, IA

Built 1977 Load: 32.7 t ADT: 11

FM

Fair

Over: DD NO. 976

089341901, Calhoun, IA

Built 1938 Load: 32.7 t ADT: 219

LOCAL

Fair

Over: DRAINAGE DITCH 125

090313601, Calhoun, IA

Built 1900 Load: 32.7 t ADT: 60

FM

Fair

Over: CAMP CREEK

087343301, Calhoun, IA

Built 1971 Load: 32.8 t ADT: 259

LOCAL

Fair

Over: HARDING CREEK

086312601, Calhoun, IA

Built 1984 Load: 33.0 t ADT: 11

LOCAL

Fair

Over: W.CEDAR CR.

087313001, Calhoun, IA

Built 1978 Load: 33.0 t ADT: 26

FM

Fair

Over: W.CEDAR CR.

087313101, Calhoun, IA

Built 1979 Load: 33.0 t ADT: 15

FM

Fair

Over: D.D. 95

087313501, Calhoun, IA

Built 1976 Load: 33.0 t ADT: 26

FM

Fair

Over: D.D. 95

087313501, Calhoun, IA

Built 1974 Load: 33.0 t ADT: 26

LOCAL

Fair

Over: DRAINAGE DITCH

088310101, Calhoun, IA

Built 1974 Load: 33.0 t ADT: 15

LOCAL

Fair

Over: D.D. NO 12

088310301, Calhoun, IA

Built 1972 Load: 33.0 t ADT: 50

LOCAL

Fair

Over: COUNTY DRAIN #31

088311301, Calhoun, IA

Built 1984 Load: 33.0 t ADT: 11

LOCAL

Fair

Over: D.D. NO 31

088311302, Calhoun, IA

Built 1974 Load: 33.0 t ADT: 34

LOCAL

Fair

Over: WELSH SLOUGH

088312301, Calhoun, IA

Built 1974 Load: 33.0 t ADT: 20

LOCAL

Fair

Over: DD #31

088312304, Calhoun, IA

Built 1983 Load: 33.0 t ADT: 20

LOCAL RD

Fair

Over: D.D. NO 31

088312602, Calhoun, IA

Built 1974 Load: 33.0 t ADT: 34

LOCAL

Fair

Over: DD 12&22

088313402, Calhoun, IA

Built 1983 Load: 33.0 t ADT: 50

LOCAL

Fair

Over: DRAINAGE DITCH 9-13

088321701, Calhoun, IA

Built 1983 Load: 33.0 t ADT: 11

LOCAL

Fair

Over: LAKE CREEK

088321702, Calhoun, IA

Built 1985 Load: 33.0 t ADT: 34

LOCAL

Fair

Over: DD 9-13

088321702, Calhoun, IA

Built 1979 Load: 33.0 t ADT: 34

LOCAL

Fair

Over: DRAINAGE DITCH #67

088331001, Calhoun, IA

Built 1983 Load: 33.0 t ADT: 15

LOCAL

Fair

Over: DD 67

088331502, Calhoun, IA

Built 1976 Load: 33.0 t ADT: 45

LOCAL

Fair

Over: DD 67

088331602, Calhoun, IA

Built 1976 Load: 33.0 t ADT: 26

FM

Fair

Over: DD 67

088331702, Calhoun, IA

Built 1976 Load: 33.0 t ADT: 26

FM

Fair

Over: DD 67

088331901, Calhoun, IA

Built 1972 Load: 33.0 t ADT: 5

LOCAL

Fair

Over: CO DRAIN #1-54

088340901, Calhoun, IA

Built 1984 Load: 33.0 t ADT: 30

LOCAL

Fair

Over: HARDIN CREEK

086310202, Calhoun, IA

Built 1987 Load: 34.1 t ADT: 15

FM

Fair

Over: DRAINAGE DITCH(LAKE CR)

089321402, Calhoun, IA

Built 1986 Load: 34.1 t ADT: 45

LOCAL

Fair

Over: DRAINAGE DITCH 1-54

089333201, Calhoun, IA

Built 1985 Load: 34.1 t ADT: 20

LOCAL

Fair

Over: D D 92

089341802, Calhoun, IA

Built 1989 Load: 35.7 t ADT: 30

IA 4 & 175

Fair

Over: PURGATORY CREEK

2.8 mi. S of N jct IA 175, Calhoun, IA

Built 1973 Load: 35.9 t ADT: 1,410

CO RD

Fair

Over: DRAINAGE DITCH #31

088313501, Calhoun, IA

Built 1990 Load: 41.5 t ADT: 669

FM

Fair

Over: RACCOON RIVER

086342506, Calhoun, IA

Built 1985 Load: 45.3 t ADT: 90

FM

Fair

Over: DD 198

086340102, Calhoun, IA

Built 1998 Load: 45.7 t ADT: 259

IA 4 & IA 175

Fair

Over: CEDAR CREEK

2.2 mi. E of N jct SR N65, Calhoun, IA

Built 1993 Load: 47.2 t ADT: 1,040

US 20

Good

Over: DRAINAGE DITCH NO 1 & 54

2.4 mi. E of Jct. SR N28, Calhoun, IA

Built 2010 Load: 29.1 t ADT: 5,900

LOCAL

Good

Over: DD NO 1

089332902, Calhoun, IA

Built 1974 Load: 30.4 t ADT: 15

FM

Good

Over: DD NO 20

087323303, Calhoun, IA

Built 1981 Load: 31.2 t ADT: 15

LOCAL

Good

Over: CAMP CREEK

088342802, Calhoun, IA

Built 1986 Load: 31.5 t ADT: 20

380TH ST

Good

Over: STREAM

086332501, Calhoun, IA

Built 2021 Load: 32.4 t ADT: 34

D68 390TH ST

Good

Over: BOONE CREEK

086333301, Calhoun, IA

Built 2020 Load: 32.4 t ADT: 30

HARRIS AVE

Good

Over: CAMP CREEK

088342502, Calhoun, IA

Built 2014 Load: 32.4 t ADT: 60

270TH ST

Good

Over: CAMP CREEK

088343501, Calhoun, IA

Built 2005 Load: 32.7 t ADT: 609

FM

Good

Over: RACOON RIVER

086342203, Calhoun, IA

Built 1987 Load: 32.7 t ADT: 110

FM

Good

Over: DD NO. 46

087342202, Calhoun, IA

Built 2004 Load: 32.7 t ADT: 40

LOCAL

Good

Over: DD#81

089343102, Calhoun, IA

Built 1986 Load: 32.7 t ADT: 11

US 20

Good

Over: W FORK CAMP CREEK

3.1 mi. E of SR N28, Calhoun, IA

Built 2010 Load: 32.7 t ADT: 5,900

US 20 WB

Good

Over: CC RR

4.0 mi. E of Jct. SR N65, Calhoun, IA

Built 2011 Load: 32.7 t ADT: 3,450

US 20 EB

Good

Over: CC RR

4.0 mi. E of Jct. SR N65, Calhoun, IA

Built 2010 Load: 32.7 t ADT: 3,450

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial