Monona County, IA

125 public highway bridges

Monona County Bridge Snapshot

Monona County, Iowa contains 125 public highway bridges in the FHWA National Bridge Inventory. Roughly 36.8% are rated “Good,” 31.2% “Fair,” 28% “Poor,” and 28% 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.

125
Total Bridges
36.8%
Good
28%
Poor
28%
Structurally Deficient

Condition Distribution

Good
36.8% (46)
Fair
31.2% (39)
Poor
28% (35)
SD
28% (35)

All Bridges (125)

IA 175

Good

Over: DRAINAGE DITCH

1.9 mi. W of E jct IA 141, Monona, IA

Built 1973 Load: 31.5 t ADT: 1,200

IA 175

Good

Over: MAPLE RIVER

1.0 MI. W. OF IA 141, Monona, IA

Built 2022 Load: 32.4 t ADT: 1,200

IA 183

Good

Over: NATURAL STREAM

3.5 mi. S of Co. Rd. E-54, Monona, IA

Built 2015 Load: 32.4 t ADT: 580

IA 183

Good

Over: STREAM

1.1 mi. S of IA 37, Monona, IA

Built 2011 Load: 32.4 t ADT: 420

NB I-29

Good

Over: CLEGHORN CREEK

4.5 mi. S of IA 175, Monona, IA

Built 2012 Load: 32.4 t ADT: 7,250

NB I-29

Good

Over: ROBINSON DITCH

4.1 mi. S of jct. IA 141, Monona, IA

Built 2011 Load: 32.4 t ADT: 7,800

TEAK AVE

Good

Over: LOCAL STREAM

082422704, Monona, IA

Built 2017 Load: 32.4 t ADT: 29

E54

Good

Over: MONONA-HARRISON DITCH

083443203, Monona, IA

Built 2015 Load: 32.4 t ADT: 289

E54

Good

Over: LITTLE SIOUX RIVER

083443301, Monona, IA

Built 2015 Load: 32.4 t ADT: 289

TULIP AVE

Good

Over: UPPER SOLDIER RIVER

084423518, Monona, IA

Built 2011 Load: 32.4 t ADT: 159

LOCAL

Good

Over: NORWAY CREEK

082420602, Monona, IA

Built 2010 Load: 32.7 t ADT: 29

SUMAC AVE

Good

Over: SKINNER CREEK

083422202, Monona, IA

Built 2008 Load: 32.7 t ADT: 45

105TH ST

Good

Over: DUTCH CREEK

085430203, Monona, IA

Built 2012 Load: 32.7 t ADT: 29

E 34

Good

Over: JORDAN CREEK

084432503, Monona, IA

Built 2012 Load: 32.7 t ADT: 259

FM

Good

Over: SIMMONS CREEK

085431406, Monona, IA

Built 1987 Load: 33.3 t ADT: 71

LOCAL

Good

Over: SOLDIER RIVER

082433003, Monona, IA

Built 1992 Load: 33.7 t ADT: 45

170TH ST

Good

Over: TRIB TO SOLDIER RIVER

084421103, Monona, IA

Built 2016 Load: 34.7 t ADT: 20

E64 REDWOOD AVE

Good

Over: BRANCH OF ELK CREEK

082432400, Monona, IA

Built 2022 Load: 36.2 t ADT: 34

245TH ST

Good

Over: JORDAN CREEK

083431503, Monona, IA

Built 2016 Load: 36.3 t ADT: 11

FM

Good

Over: MAPLE RIVER

084442403, Monona, IA

Built 1957 Load: 36.5 t ADT: 188

FM

Good

Over: DRAINAGE DITCH

085462210, Monona, IA

Built 1998 Load: 37.0 t ADT: 1,017

FM

Good

Over: STREAM

084440904, Monona, IA

Built 1957 Load: 37.4 t ADT: 11

WEST ST

Good

Over: MCCANDLES DITCH

085463507, Monona, IA

Built 2020 Load: 37.6 t ADT: 56

FM

Good

Over: SOLDIER RIVER

083423006, Monona, IA

Built 2000 Load: 38.5 t ADT: 40

LOCAL ROAD

Good

Over: STREAM

082422605, Monona, IA

Built 1999 Load: 38.8 t ADT: 34

210TH ST

Good

Over: JORDAN CREEK

084433501, Monona, IA

Built 2020 Load: 39.9 t ADT: 29

235TH ST

Good

Over: MCCANDLESS-CLEGHORN

083450803, Monona, IA

Built 2021 Load: 41.1 t ADT: 150

IA 37

Good

Over: EAST WILLOW RIVER

0.7 mi. E of SR E54, Monona, IA

Built 1996 Load: 42.8 t ADT: 830

FM

Good

Over: ELK CREEK

082432402, Monona, IA

Built 1988 Load: 43.3 t ADT: 45

SUMAC AVE

Good

Over: STREAM

084422206, Monona, IA

Built 2019 Load: 43.4 t ADT: 40

LOCAL

Good

Over: SOLDIER RIVER

083420403, Monona, IA

Built 2009 Load: 43.7 t ADT: 11

E26 160TH ST

Good

Over: RUSH CREEK

084420203, Monona, IA

Built 2021 Load: 43.7 t ADT: 79

E16

Good

Over: RUSH CREEK

085422401, Monona, IA

Built 2021 Load: 44.4 t ADT: 627

L16

Good

Over: ELK CREEK

082431504, Monona, IA

Built 2020 Load: 45.0 t ADT: 170

E46 245TH ST

Good

Over: SOLDIER RIVER

083421707, Monona, IA

Built 2020 Load: 47.6 t ADT: 60

FM

Good

Over: LITTLE SIOUX RIVER

082442103, Monona, IA

Built 2007 Load: 51.8 t ADT: 100

LOCAL(WHITING)

Good

Over: MCCANDLESS CLEGHORN

084460201, Monona, IA

Built 1997 Load: 52.9 t ADT: 763

IA 37

Good

Over: JORDAN CREEK

6.3 mi. E of IA 175, Monona, IA

Built 1979 Load: 58.9 t ADT: 780

LOCAL RD

Good

Over: CLEGHORN DD

083450703, Monona, IA

Built 2002 Load: 62.9 t ADT: 319

IA 141

Good

Over: SIMMONS CREEK

0.8 Mi W of W Jct. IA175, Monona, IA

Built 2014 Load: 66.1 t ADT: 1,880

LOCAL

Poor

Over: LOCAL STREAM

082432208, Monona, IA

Built 1900 Load: 10.8 t ADT: 11

FM

Poor

Over: NE NORWAY CREEK

083422602, Monona, IA

Built 1949 Load: 11.1 t ADT: 50

FM

Poor

Over: NORWAY CREEK

083423401, Monona, IA

Built 1953 Load: 11.9 t ADT: 40

LOCAL

Poor

Over: TRIB MAPLE RIVER

084430102, Monona, IA

Built 1900 Load: 12.2 t ADT: 20

FM

Poor

Over: DD

084452509, Monona, IA

Built 1959 Load: 14.3 t ADT: 597

FM

Poor

Over: WILLOW CREEK

082421202, Monona, IA

Built 1952 Load: 15.7 t ADT: 40

FM

Poor

Over: LITTLE SIOUX RIVER

084443003, Monona, IA

Built 1960 Load: 16.1 t ADT: 45

FM

Poor

Over: NAGEL DD

084440804, Monona, IA

Built 1960 Load: 16.4 t ADT: 79

FM

Poor

Over: LITTLE SIOUX RIVER

085441603, Monona, IA

Built 1961 Load: 16.8 t ADT: 150

FM

Poor

Over: FAMERS GARRETSON DITCH

085450404, Monona, IA

Built 1962 Load: 16.8 t ADT: 578

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