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)

180TH ST

Good

Over: PICAYUNE CREEK

080421305, Harrison, IA

Built 1981 Load: 33.3 t ADT: 79

FM GENEVA PLACE

Good

Over: SOLDIER RIVER

081442705, Harrison, IA

Built 1980 Load: 34.1 t ADT: 50

180TH STREET

Good

Over: BOYER RIVER

080421203, Harrison, IA

Built 2002 Load: 34.6 t ADT: 79

QUINCY TRAIL

Good

Over: BOYER RIVER

080422805, Harrison, IA

Built 1994 Load: 34.6 t ADT: 15

242 TRAIL

Good

Over: WILLOW CREEK

079431503, Harrison, IA

Built 1986 Load: 35.1 t ADT: 60

280TH ST

Good

Over: WILLOW RIVER

078440401, Harrison, IA

Built 2021 Load: 36.3 t ADT: 60

235TH TRAIL

Good

Over: WILLOW CREEK

079431003, Harrison, IA

Built 2006 Load: 36.6 t ADT: 29

FM-335TH ST

Good

Over: PIGEON CREEK

078423401, Harrison, IA

Built 1991 Load: 37.2 t ADT: 79

LOC VIENNA AVE

Good

Over: PICAYUNE CREEK

080411204, Harrison, IA

Built 2006 Load: 37.2 t ADT: 26

280TH STREET

Good

Over: ALLEN CREEK

078440501, Harrison, IA

Built 2020 Load: 37.3 t ADT: 45

BUS BROWN DR

Good

Over: DRAINAGE

East of Lincolnway, Harrison, IA

Built 2017 Load: 37.6 t ADT: 1,225

FM & 340TH ST

Good

Over: WILLOW RIVER

081420301, Harrison, IA

Built 2005 Load: 37.6 t ADT: 50

FM-335TH ST

Good

Over: POTATO CREEK

078423101, Harrison, IA

Built 1993 Load: 38.2 t ADT: 100

F58 296TH ST

Good

Over: MOSQUITO CREEK

025500525, Harrison, IA

Built 2016 Load: 40.1 t ADT: 121

155TH ST

Good

Over: BOYER RIVER

081413107, Harrison, IA

Built 2018 Load: 43.1 t ADT: 40

E KELLY AVE

Good

Over: SOLDIER RIVER

080440706, Harrison, IA

Built 2013 Load: 44.7 t ADT: 60

F50 270TH ST

Good

Over: ALLEN CREEK

079443501, Harrison, IA

Built 2021 Load: 48.0 t ADT: 379

HARVARD TRAIL

Good

Over: ALLEN CREEK

080433006, Harrison, IA

Built 2008 Load: 52.6 t ADT: 34

315TH ST

Good

Over: KEG CREEK

078412301, Harrison, IA

Built 1999 Load: 58.0 t ADT: 20

SPOKANE AVE

Good

Over: MILL CREEK

081412104, Harrison, IA

Built 2003 Load: 58.0 t ADT: 45

IA 44

Good

Over: BRANCH SIX MILE CREEK

4.3 MI. E OF JCT. US 30, Harrison, IA

Built 1978 Load: 99.9 t ADT: 800

8TH STREET

Poor

Over: BOYER RIVER

000000000, Harrison, IA

Built 1900 ADT: 123

NEELY TRAIL

Poor

Over: WILLOW CREEK

080432707, Harrison, IA

Built 1940 ADT: 45

MEDFORD AVE

Poor

Over: WILLOW RIVER

079432102, Harrison, IA

Built 1900 Load: 4.3 t ADT: 89

155TH ST

Poor

Over: WILLOW RIVER

081423203, Harrison, IA

Built 1930 Load: 5.4 t ADT: 11

325TH ST

Poor

Over: KEG CREEK

078412601, Harrison, IA

Built 1900 Load: 5.7 t ADT: 11

RENO AVE

Poor

Over: SIX MILE CREEK

079421204, Harrison, IA

Built 1930 Load: 6.3 t ADT: 11

315TH ST

Poor

Over: MOSQUITO CREEK

078412003, Harrison, IA

Built 1930 Load: 9.1 t ADT: 20

LOC 128 TRAIL

Poor

Over: BOYER RIVER

081411705, Harrison, IA

Built 1940 Load: 9.4 t ADT: 89

JASPER TRAIL

Poor

Over: SMALL CREEK

079441103, Harrison, IA

Built 1900 Load: 10.8 t ADT: 50

250TH ST

Poor

Over: ALLEN CREEK

079442301, Harrison, IA

Built 1965 Load: 11.0 t ADT: 11

LOC CANAL ST

Poor

Over: WILLOW RIVER

078442103, Harrison, IA

Built 1916 Load: 12.1 t ADT: 100

180TH ST

Poor

Over: WILLOW CREEK

080431405, Harrison, IA

Built 1975 Load: 12.3 t ADT: 15

KENDALL TRAIL

Poor

Over: STEER CREEK

080441207, Harrison, IA

Built 1969 Load: 12.6 t ADT: 5

280TH ST

Poor

Over: MOSQUITO CREEK

078410301, Harrison, IA

Built 1940 Load: 12.9 t ADT: 20

LOCAL 120TH ST

Poor

Over: LITTLE SIOUX RIVER

081440703, Harrison, IA

Built 1971 Load: 13.1 t ADT: 40

288TH ST

Poor

Over: MOSQUITO CREEK

078410409, Harrison, IA

Built 1940 Load: 13.2 t ADT: 34

TAYLOR AVE

Poor

Over: PIGEON CREEK

078420102, Harrison, IA

Built 1920 Load: 13.2 t ADT: 40

240TH STREET

Poor

Over: PIGEON CREEK

079411403, Harrison, IA

Built 1967 Load: 13.3 t ADT: 15

325TH ST

Poor

Over: PIGEON CREEK

078422703, Harrison, IA

Built 1960 Load: 13.5 t ADT: 11

FM & NASH TRAIL

Poor

Over: ALLEN CREEK

081432604, Harrison, IA

Built 1976 Load: 13.9 t ADT: 20

LOC 335TH ST

Poor

Over: ALLEN CREEK

078443203, Harrison, IA

Built 1959 Load: 14.1 t ADT: 20

AUSTIN AVE

Poor

Over: STREAM

080451306, Harrison, IA

Built 1936 Load: 14.1 t ADT: 488

MOBILE AVE

Poor

Over: ALLEN CREEK

081433402, Harrison, IA

Built 1957 Load: 14.6 t ADT: 11

LOC 215TH ST

Poor

Over: PIGEON CREEK

080413603, Harrison, IA

Built 1955 Load: 14.8 t ADT: 26

VIENNA AVE

Poor

Over: PIGEON CREEK

079410102, Harrison, IA

Built 1967 Load: 15.0 t ADT: 60

LOC 210TH ST

Poor

Over: LITTLE PIGEON

080413501, Harrison, IA

Built 1930 Load: 16.1 t ADT: 11

198TH ST

Poor

Over: SMALL CREEK

080422211, Harrison, IA

Built 1950 Load: 18.0 t ADT: 79

125TH ST

Poor

Over: SMALL STREAM

081431603, Harrison, IA

Built 1960 Load: 18.5 t ADT: 5

FM EASTON TRAIL

Poor

Over: ALLEN CREEK

081433403, Harrison, IA

Built 1969 Load: 20.9 t ADT: 335

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.