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)

FM

Poor

Over: JORDAN CREEK

082430511, Monona, IA

Built 1958 Load: 17.1 t ADT: 159

FM

Poor

Over: BEAVER CREEK

083430403, Monona, IA

Built 1958 Load: 17.1 t ADT: 11

LOCAL

Poor

Over: MONONA HARRISON DD

084451301, Monona, IA

Built 1959 Load: 17.1 t ADT: 45

FM

Poor

Over: SIOUX RIVER

084452511, Monona, IA

Built 1960 Load: 17.1 t ADT: 45

LOCAL

Poor

Over: WEST FORK DD

085450903, Monona, IA

Built 1961 Load: 17.1 t ADT: 45

FM

Poor

Over: HAITZ DD

085452501, Monona, IA

Built 1961 Load: 17.1 t ADT: 229

FM

Poor

Over: SOLDIER RIVER

082431501, Monona, IA

Built 1955 Load: 17.6 t ADT: 349

FM

Poor

Over: WEST FORK DD

085452701, Monona, IA

Built 1961 Load: 18.1 t ADT: 229

FM

Poor

Over: LITTLE SIOUX RIVER

085440205, Monona, IA

Built 1925 Load: 18.8 t ADT: 159

LOCAL

Poor

Over: WILLOW CREEK

082420103, Monona, IA

Built 1978 Load: 22.1 t ADT: 11

LOCAL

Poor

Over: STREAM

085432701, Monona, IA

Built 1900 Load: 22.1 t ADT: 60

FM

Poor

Over: WILLOW CREEK

082422203, Monona, IA

Built 1979 Load: 23.3 t ADT: 199

LOCAL

Poor

Over: MCCANDLESS CLEGHORN

084461401, Monona, IA

Built 1976 Load: 24.5 t ADT: 26

LOCAL

Poor

Over: STREAM

085420404, Monona, IA

Built 1973 Load: 24.5 t ADT: 80

LOCAL

Poor

Over: TRIB TO SOLDIER RIVER

084421103, Monona, IA

Built 1990 Load: 26.8 t ADT: 20

IA 141 & 175

Poor

Over: MAPLE RIVER

0.1 mi. E of W jct IA 175, Monona, IA

Built 1967 Load: 29.7 t ADT: 3,640

K53 DOGWOOD AVE

Poor

Over: MCCANDLESS CLEGHORN

085462402, Monona, IA

Built 1970 Load: 33.5 t ADT: 20

LOCAL

Structurally Deficient

Over: WILLOW CREEK

082421404, Monona, IA

Built 1905 ADT: 11

LOCAL

Structurally Deficient

Over: JORDAN CREEK

082430503, Monona, IA

Built 1912 ADT: 15

LOCAL ROAD

Structurally Deficient

Over: LOCAL STREAM

085431405, Monona, IA

Built 1964 ADT: 26

LOCAL RD

Structurally Deficient

Over: WEST FORK DD

085450401, Monona, IA

Built 1912 ADT: 34

100TH ST

Structurally Deficient

Over: FARMERS GARRETSON DD

085450501, Monona, IA

Built 1913 ADT: 11

LOCAL ROAD

Structurally Deficient

Over: LOCAL STREAM

083430206, Monona, IA

Built 1962 Load: 13.5 t ADT: 29

FM

Structurally Deficient

Over: DIVERSION DITCH

084441808, Monona, IA

Built 1962 Load: 13.6 t ADT: 597

FM

Structurally Deficient

Over: LITTLE SIOUX RIVER

084441803, Monona, IA

Built 1960 Load: 16.1 t ADT: 131

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

Related

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