Union County, IA

153 public highway bridges

Union County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Union County, Iowa contains 153 public highway bridges. Roughly 30.7% are rated “Good,” 34% “Fair,” and 35.3% “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.

153

Total Bridges

30.7%

Good

34%

Fair

35.3%

Poor Condition

Condition Distribution

Good

30.7% (47)

Fair

34% (52)

Poor

35.3% (54)

All Bridges (153)

Sort:

H29 167TH ST

Over: FOUR MILE CREEK

072280205, Union, IA

Built 1952 ADT: 20

FM

Over: FOUR MILE CREEK

073282501, Union, IA

Built 1952 Load: 6.0 t ADT: 50

LOCAL

Over: SMALL STREAM

071303501, Union, IA

Built 1940 Load: 7.9 t ADT: 11

FM

Over: TWELVE MILE CREEK

071290204, Union, IA

Built 1957 Load: 10.0 t ADT: 40

FM

Over: STREAM

071293401, Union, IA

Built 1960 Load: 14.1 t ADT: 45

LOCAL

Over: STREAM

072312101, Union, IA

Built 1981 Load: 16.7 t ADT: 123

LOCAL

Over: SMALL STREAM

072283605, Union, IA

Built 2002 Load: 17.1 t ADT: 26

FM

Over: GRAND RIVER

072283301, Union, IA

Built 1957 Load: 17.3 t ADT: 49

LOCAL

Over: TWELVE MILE CREEK

071290202, Union, IA

Built 1970 Load: 19.2 t ADT: 46

LOCAL

Over: INDIAN CREEK

071290702, Union, IA

Built 1999 Load: 21.3 t ADT: 11

FM

Over: TWELVE MILE CREEK

072293403, Union, IA

Built 1956 Load: 21.9 t ADT: 128

FM

Over: MIDDLE PLATTE RIVER

071312107, Union, IA

Built 1967 Load: 22.3 t ADT: 15

LOCAL

Over: WEST PLATTE

072313102, Union, IA

Built 1979 Load: 22.3 t ADT: 79

FM

Over: GRAND RIVER

073292407, Union, IA

Built 1988 Load: 23.2 t ADT: 60

FM

Over: FOUR MILE CREEK

073282402, Union, IA

Built 1950 Load: 24.2 t ADT: 20

IA 25

Over: STREAM

1.0 MI. N OF N JCT. US 34, Union, IA

Built 1976 Load: 24.9 t ADT: 4,870

FM

Over: NODAWAY RIVER

073311702, Union, IA

Built 1978 Load: 26.6 t ADT: 29

IA 25

Over: SUMMIT LAKE

2.6 MI. N OF N JCT. US 34, Union, IA

Built 1976 Load: 26.8 t ADT: 1,950

US 34

Over: TWELVE MILE CREEK

2.4 MI. W OF JCT. U.S.169, Union, IA

Built 1971 Load: 27.9 t ADT: 4,890

LOCAL

Over: SMALL STREAM

071310302, Union, IA

Built 1995 Load: 28.2 t ADT: 35

FM

Over: GRAND RIVER

071301301, Union, IA

Built 1979 Load: 28.5 t ADT: 89

FM

Over: MIDDLE PLATTE

071310102, Union, IA

Built 1975 Load: 29.9 t ADT: 927

FM

Over: E BR MIDDLE PLATTE RIVER

071311502, Union, IA

Built 1980 Load: 29.9 t ADT: 20

FM

Over: EAST PLATTE RIVER

071313402, Union, IA

Built 1983 Load: 29.9 t ADT: 15

FM

Over: PLATTE RIVER

072311501, Union, IA

Built 1979 Load: 29.9 t ADT: 757

US 34 & 169

Over: GRAND RIVER

1.2 mi. W of E Jct US 169, Union, IA

Built 1971 Load: 30.0 t ADT: 3,450

LOCAL

Over: W WOLFE CREEK

073282003, Union, IA

Built 1995 Load: 30.1 t ADT: 46

LOCAL

Over: PLATTE RIVER

071310301, Union, IA

Built 1979 Load: 30.2 t ADT: 15

FM

Over: THREE MILE CREEK

073300408, Union, IA

Built 1985 Load: 30.2 t ADT: 60

FM

Over: THREE MILE CREEK

072291304, Union, IA

Built 1976 Load: 30.6 t ADT: 71

LOCAL

Over: TWELVE MILE CREEK

072292001, Union, IA

Built 1977 Load: 30.6 t ADT: 103

WILLOW AVENUE

Over: GRAND RIVER

071281110, Union, IA

Built 1980 Load: 30.8 t ADT: 120

LOCAL

Over: STREAM

072292005, Union, IA

Built 1999 Load: 30.8 t ADT: 46

LOCAL

Over: SMALL STREAM

072303401, Union, IA

Built 1988 Load: 32.0 t ADT: 15

FM

Over: WOLF CREEK

073292403, Union, IA

Built 2001 Load: 32.2 t ADT: 100

LOCAL ROAD

Over: SMALL STREAM

071280404, Union, IA

Built 1978 Load: 32.7 t ADT: 15

FM

Over: SMALL STREAM

071310504, Union, IA

Built 1974 Load: 32.7 t ADT: 131

FM

Over: THREE MILE CREEK

072290404, Union, IA

Built 1969 Load: 32.7 t ADT: 450

FM

Over: CREEK

072303202, Union, IA

Built 1994 Load: 32.7 t ADT: 319

LOCAL

Over: SMALL STREAM

073311805, Union, IA

Built 1990 Load: 32.7 t ADT: 11

US 34

Over: FOUR MILE CREEK

2 MI. E OF E JCT. US 169, Union, IA

Built 1971 Load: 32.9 t ADT: 3,040

LOCAL

Over: SMALL STREAM

072280203, Union, IA

Built 1979 Load: 33.4 t ADT: 11

LOCAL

Over: STREAM

071290701, Union, IA

Built 1965 Load: 35.1 t ADT: 46

LOCAL

Over: SAND CREEK

071283203, Union, IA

Built 1984 Load: 35.6 t ADT: 21

US 34 & IA 25

Over: BRANCH PLATTE RIVER

1.0 MI. E OF W JCT IA 25, Union, IA

Built 1973 Load: 36.4 t ADT: 3,730

LOCAL

Over: PLATTE RIVER

071312301, Union, IA

Built 1986 Load: 36.5 t ADT: 72

FM

Over: EAST BRANCH PLATTE RIVER

072303003, Union, IA

Built 1979 Load: 37.3 t ADT: 89

LOCAL

Over: CREEK

072300301, Union, IA

Built 1952 Load: 37.6 t ADT: 11

LARK AVENUE

Over: SMALL STREAM

071301202, Union, IA

Built 2002 Load: 38.1 t ADT: 30

FM 160TH ST

Over: CREEK

072300503, Union, IA

Built 1952 Load: 38.5 t ADT: 150

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

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Compiled by PlainBridges, Independent data publisher

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.