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

Unknown

Over: I-29

At jct I-29, Monona, IA

Built 1959 ADT: 13,000

FM

Unknown

Over: I-29

3.5 mi. S of IA 175, Monona, IA

Built 1967 ADT: 14,800

K42

Unknown

Over: I-29

1.7 mi. N of IA 175, Monona, IA

Built 1959 ADT: 15,500

E-24 (160TH ST)

Unknown

Over: I-29

At jct. of S.R. E24, Monona, IA

Built 1959 ADT: 15,300

FM

Unknown

Over: I-29

4.3 mi. N of Jct. SR E24, Monona, IA

Built 1959 ADT: 15,900

LOCAL

Fair

Over: NORWAY CREEK

082420502, Monona, IA

Built 1983 Load: 5.2 t ADT: 15

LOCAL

Fair

Over: SOLDIER VALLEY D D

082433202, Monona, IA

Built 1900 Load: 14.3 t ADT: 5

FM

Fair

Over: ELK CREEK

082432405, Monona, IA

Built 1955 Load: 15.7 t ADT: 40

FM

Fair

Over: STREAM

085442212, Monona, IA

Built 1956 Load: 15.9 t ADT: 71

FM

Fair

Over: WILLOW CREEK

082422703, Monona, IA

Built 1960 Load: 17.1 t ADT: 11

FM

Fair

Over: HAITZ DD

084450101, Monona, IA

Built 1961 Load: 17.1 t ADT: 34

LOCAL

Fair

Over: TRIB MAPLE RIVER

085421002, Monona, IA

Built 1900 Load: 17.1 t ADT: 20

FM

Fair

Over: WEST FORK DD

084450203, Monona, IA

Built 1961 Load: 18.1 t ADT: 34

LOCAL

Fair

Over: DIVERSION DITCH

084451301, Monona, IA

Built 1961 Load: 18.1 t ADT: 45

FM

Fair

Over: MCCANDLESS CLEGHORN

084462301, Monona, IA

Built 1959 Load: 20.9 t ADT: 29

LOCAL RD

Fair

Over: GARD CREEK

084440810, Monona, IA

Built 1954 Load: 22.7 t ADT: 5

FM

Fair

Over: WILLOW CREEK

082423308, Monona, IA

Built 1955 Load: 24.5 t ADT: 15

PLUM AVE

Fair

Over: LOCAL STREAM

082432205, Monona, IA

Built 1950 Load: 24.5 t ADT: 40

FM

Fair

Over: BEAVER CR

083441506, Monona, IA

Built 1974 Load: 24.5 t ADT: 150

FM

Fair

Over: STREAM

084433005, Monona, IA

Built 1956 Load: 24.5 t ADT: 40

IA 175

Fair

Over: DRAINAGE DITCH

1.3 mi. E of SR L20, Monona, IA

Built 1973 Load: 24.9 t ADT: 1,200

LOCAL

Fair

Over: HEISLER CREEK

085421802, Monona, IA

Built 1976 Load: 25.6 t ADT: 11

IA 175

Fair

Over: DRAINAGE DITCH

3.0 mi. E of S.R. L12, Monona, IA

Built 1964 Load: 26.2 t ADT: 2,120

LOCAL

Fair

Over: SKUNK CREEK

084420106, Monona, IA

Built 1990 Load: 26.8 t ADT: 11

LOCAL

Fair

Over: HAITZ DD

085451201, Monona, IA

Built 1962 Load: 27.1 t ADT: 20

LOCAL

Fair

Over: MCCABDLESS CLEGHORN DD

085462302, Monona, IA

Built 2004 Load: 27.2 t ADT: 34

IA 175

Fair

Over: DRAINAGE DITCH

4.5 mi. E of E jct SR L20, Monona, IA

Built 1973 Load: 27.5 t ADT: 1,200

LOCAL

Fair

Over: MCCANDLESS CLEGHORN DD

085462403, Monona, IA

Built 1971 Load: 29.8 t ADT: 50

IA 175

Fair

Over: MUCKY CREEK

0.8 mi. W of W Jct IA 141, Monona, IA

Built 1973 Load: 30.1 t ADT: 1,200

FM

Fair

Over: MONONA HARRISON DD

082442003, Monona, IA

Built 1974 Load: 30.4 t ADT: 100

IA 175

Fair

Over: DRAINAGE DITCH

2.9 mi. E of E jct SR L20, Monona, IA

Built 1973 Load: 30.8 t ADT: 1,200

FM

Fair

Over: NEW FARMER MAIN D.D.

084450301, Monona, IA

Built 2002 Load: 32.7 t ADT: 50

LOCAL

Fair

Over: STREAM

084451104, Monona, IA

Built 2002 Load: 32.7 t ADT: 15

IA 37

Fair

Over: BEAVER CREEK

4.4 mi. E of IA 175, Monona, IA

Built 1942 Load: 33.6 t ADT: 780

LOCAL

Fair

Over: MCCANDLESS CLEGHORN DD

085462503, Monona, IA

Built 1970 Load: 34.2 t ADT: 40

FM

Fair

Over: CROW CREEK

082423004, Monona, IA

Built 1955 Load: 35.5 t ADT: 20

IA 37

Fair

Over: NORWAY CREEK

2.6 mi. E of IA 183, Monona, IA

Built 1959 Load: 36.7 t ADT: 620

IA 183

Fair

Over: SOLDIER RIVER

1.1 mi. S of Jct. IA 141, Monona, IA

Built 1998 Load: 38.5 t ADT: 580

FM

Fair

Over: JORDAN CREEK

082430905, Monona, IA

Built 2000 Load: 42.5 t ADT: 199

LOCAL

Fair

Over: SKINNER CREEK

083422201, Monona, IA

Built 1956 Load: 68.2 t ADT: 79

FM

Fair

Over: STREAM

084433004, Monona, IA

Built 1952 Load: 73.5 t ADT: 29

FM

Fair

Over: STREAM

084433005, Monona, IA

Built 1956 Load: 79.0 t ADT: 40

LOCAL

Fair

Over: DUTCH CREEK

085431103, Monona, IA

Built 1976 Load: 99.9 t ADT: 11

LOCAL RD

Fair

Over: SMALL STREAM

085431403, Monona, IA

Built 1979 Load: 99.9 t ADT: 26

IA 175

Good

Over: DRAINAGE DITCH

3.8 mi. W of SR L37, Monona, IA

Built 1900 Load: 18.1 t ADT: 1,430

IA 175

Good

Over: STREAM

2.9 mi E of W Jct IA 141, Monona, IA

Built 1952 Load: 18.1 t ADT: 1,430

IA 175

Good

Over: DRAINAGE DITCH

0.6 mi E of SR L20, Monona, IA

Built 1973 Load: 24.6 t ADT: 970

IA 175

Good

Over: DRAINAGE DITCH

5.2 mi E of E jct SR L20, Monona, IA

Built 1973 Load: 25.6 t ADT: 1,200

IA 183

Good

Over: OVERFLOW CHANNEL

4.8 mi. S of SR E54, Monona, IA

Built 2008 Load: 27.1 t ADT: 580

IA 175

Good

Over: DRAINAGE DITCH

0.7 mi. W of jct. SR E34, Monona, IA

Built 1973 Load: 30.6 t ADT: 1,140

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