Monona County, IA

125 public highway bridges

Monona County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Monona County, Iowa contains 125 public highway bridges. Roughly 36.8% are rated “Good,” 31.2% “Fair,” and 28% “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.

125
Total Bridges
36.8%
Good
31.2%
Fair
28%
Poor Condition

Condition Distribution

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

All Bridges (125)

FM

Poor

Over: DIVERSION DITCH

084441808, Monona, IA

Built 1962 Load: 13.6 t ADT: 597

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

084441803, Monona, IA

Built 1960 Load: 16.1 t ADT: 131

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

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

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge 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.