Harrison County, IA

162 public highway bridges

Harrison County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Harrison County, Iowa contains 162 public highway bridges. Roughly 19.8% are rated “Good,” 54.3% “Fair,” and 25.3% “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.

162
Total Bridges
19.8%
Good
54.3%
Fair
25.3%
Poor Condition

Condition Distribution

Good
19.8% (32)
Fair
54.3% (88)
Poor
25.3% (41)

All Bridges (162)

LOCAL RD

Unknown

Over: I-29

1.0 MI. N OF JCT. US 30, Harrison, IA

Built 1966 ADT: 16,100

OSAGE TRAIL

Fair

Over: WILLOW RIVER

081422907, Harrison, IA

Built 1977 Load: 8.6 t ADT: 5

MALDEN TRAIL

Fair

Over: ALLEN CREEK

080430404, Harrison, IA

Built 1940 Load: 9.5 t ADT: 40

220TH ST

Fair

Over: ALLEN CREEK

079440301, Harrison, IA

Built 1940 Load: 11.6 t ADT: 11

FM - 335TH ST

Fair

Over: MOSQUITO CREEK

078413203, Harrison, IA

Built 1920 Load: 12.0 t ADT: 120

FM - 335TH ST

Fair

Over: SMALL STREAM

078413601, Harrison, IA

Built 1952 Load: 12.3 t ADT: 40

140TH ST

Fair

Over: ALLEN CREEK

081432601, Harrison, IA

Built 1973 Load: 13.8 t ADT: 15

FM & 110TH ST

Fair

Over: WILLOW RIVER

081421601, Harrison, IA

Built 1918 Load: 14.1 t ADT: 29

NORWOOD AVE

Fair

Over: HONEY CREEK

078433306, Harrison, IA

Built 1900 Load: 14.6 t ADT: 5

YATES AVE

Fair

Over: SMALL STREAM

078413602, Harrison, IA

Built 1960 Load: 15.0 t ADT: 20

170TH LANE

Fair

Over: ALLEN CREEK

080430507, Harrison, IA

Built 1969 Load: 17.1 t ADT: 11

HILLSIDE AVE

Fair

Over: STEER CREEK

080441106, Harrison, IA

Built 1963 Load: 17.1 t ADT: 40

US 30

Fair

Over: STREAM

2.4 mi. E of SR F-32, Harrison, IA

Built 1924 Load: 17.5 t ADT: 3,090

RUBY TRAIL

Fair

Over: SIX MILE CREEK

079421210, Harrison, IA

Built 1945 Load: 17.6 t ADT: 26

FM NEWARK AVE

Fair

Over: ALLEN CREEK

081431302, Harrison, IA

Built 1960 Load: 17.9 t ADT: 5

IA 127

Fair

Over: LITTLE BLOOMER CREEK

2.7 mi. E of E jct IA 183, Harrison, IA

Built 1940 Load: 18.1 t ADT: 460

FM - 335TH ST

Fair

Over: KEG CREEK

078413501, Harrison, IA

Built 1955 Load: 20.0 t ADT: 50

FM & 270TH ST

Fair

Over: PIGEON CREEK

079413301, Harrison, IA

Built 1951 Load: 20.3 t ADT: 20

LOC-SPOKANE AVE

Fair

Over: PICAYUNE CREEK

080410512, Harrison, IA

Built 1979 Load: 21.2 t ADT: 11

FM & 155TH ST

Fair

Over: MUD CREEK

081423605, Harrison, IA

Built 1940 Load: 21.4 t ADT: 79

LOCAL VIENNA AV

Fair

Over: SPRING CREEK

079412402, Harrison, IA

Built 1960 Load: 21.9 t ADT: 29

YALE AVE

Fair

Over: KEG CREEK

078411302, Harrison, IA

Built 1940 Load: 23.0 t ADT: 29

US 30

Fair

Over: ALLEN CREEK

0.9 MI. W OF JCT.29, Harrison, IA

Built 1966 Load: 23.3 t ADT: 6,500

NB I-29

Fair

Over: BURCHAM CREEK

2.7 MI. S OF JCT 127, Harrison, IA

Built 1967 Load: 23.3 t ADT: 7,600

FM OVERTON AVE

Fair

Over: HARRIS GROVE CREEK

078430308, Harrison, IA

Built 1963 Load: 24.3 t ADT: 788

FM 335TH ST

Fair

Over: BOYER RIVER

078442301, Harrison, IA

Built 1959 Load: 24.8 t ADT: 788

FM 110 ST

Fair

Over: BOYER RIVER

081410303, Harrison, IA

Built 1984 Load: 24.9 t ADT: 199

FM - 305TH ST

Fair

Over: MOSQUITO CREEK

078411603, Harrison, IA

Built 1978 Load: 25.1 t ADT: 34

FM 296TH ST

Fair

Over: PIGEON CREEK

078421101, Harrison, IA

Built 1962 Load: 25.1 t ADT: 270

SEWARD AVE

Fair

Over: PIGEON CREEK

078423304, Harrison, IA

Built 1979 Load: 25.1 t ADT: 60

FM & 194TH ST

Fair

Over: WILLOW RIVER

080432303, Harrison, IA

Built 1968 Load: 25.8 t ADT: 100

305TH ST

Fair

Over: ALLEN CREEK

078441701, Harrison, IA

Built 1974 Load: 25.9 t ADT: 139

SB I-29

Fair

Over: BURCHAM CREEK

2.8 MI. S OF JCT. 127, Harrison, IA

Built 1967 Load: 26.0 t ADT: 7,600

NB I-29

Fair

Over: DRAINAGE DITCH

1.8 MI. N OF JCT.127, Harrison, IA

Built 1967 Load: 26.0 t ADT: 7,300

SB I-29

Fair

Over: DRAINAGE DITCH

1.8 MI. N OF JCT.127, Harrison, IA

Built 1967 Load: 26.0 t ADT: 7,300

FM & 170TH ST

Fair

Over: E.PICAYUNE CREEK

080410305, Harrison, IA

Built 1978 Load: 26.1 t ADT: 15

SB I-29

Fair

Over: DRAINAGE DITCH

1.6 Mi. N of Jct. SR F-20, Harrison, IA

Built 1966 Load: 26.2 t ADT: 7,250

NB I-29

Fair

Over: LITTLE SIOUX RIVER

0.4 MI. N OF JCT. SR F-20, Harrison, IA

Built 1967 Load: 26.5 t ADT: 7,250

SB I-29

Fair

Over: LITTLE SIOUX RIVER

0.4 MI. N OF JCT. SR F-20, Harrison, IA

Built 1967 Load: 26.5 t ADT: 7,250

SB I-29

Fair

Over: BURCHAM CREEK

1.2 MI. S OF JCT. IA 127, Harrison, IA

Built 1967 Load: 26.9 t ADT: 7,600

270TH ST

Fair

Over: SPRING CREEK

079413501, Harrison, IA

Built 1951 Load: 26.9 t ADT: 20

FM & PANORA AVE

Fair

Over: WILLOW RIVER

081422905, Harrison, IA

Built 1972 Load: 27.1 t ADT: 100

260TH ST

Fair

Over: WILLOW CREEK

079433007, Harrison, IA

Built 1966 Load: 27.3 t ADT: 417

FM & 220TH ST

Fair

Over: PIGEON CREEK

079410101, Harrison, IA

Built 1952 Load: 27.6 t ADT: 26

FM 130TH ST

Fair

Over: ALLEN CREEK

081432303, Harrison, IA

Built 1950 Load: 28.0 t ADT: 15

FM & TOLEDO AVE

Fair

Over: PICAYUNE CREEK

080410304, Harrison, IA

Built 1977 Load: 28.6 t ADT: 60

FM TOLEDO AVE

Fair

Over: MILL CREEK

081412206, Harrison, IA

Built 1977 Load: 30.2 t ADT: 139

296TH ST

Fair

Over: BOYER RIVER

078441203, Harrison, IA

Built 1974 Load: 30.4 t ADT: 577

FM GORDON AVE

Fair

Over: SOLDIER RIVER

080440404, Harrison, IA

Built 1974 Load: 30.4 t ADT: 60

US 30

Fair

Over: BOYER RIVER

3.7 mi. W of jct. IA 37, Harrison, IA

Built 1968 Load: 31.7 t ADT: 3,090

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.