Harrison County, IA

162 public highway bridges

Harrison County Bridge Snapshot

Harrison County, Iowa contains 162 public highway bridges in the FHWA National Bridge Inventory. Roughly 19.8% are rated “Good,” 54.3% “Fair,” 25.3% “Poor,” and 25.3% 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.

162

Total Bridges

19.8%

Good

25.3%

Poor

25.3%

Structurally Deficient

Condition Distribution

Good

19.8% (32)

Fair

54.3% (88)

Poor

25.3% (41)

SD

25.3% (41)

All Bridges (162)

Sort:

US 30

Over: STREAM

3.6 miles east of SR F-32, Harrison, IA

Built 2012 Load: 32.4 t ADT: 3,090

F20L EASTON TRAIL

Over: WILLOW CREEK

080420607, Harrison, IA

Built 2020 Load: 32.4 t ADT: 437

L20 LOESS HILLS

Over: SMALL NATURAL STREAM

078440306, Harrison, IA

Built 1926 Load: 32.7 t ADT: 1,534

288TH STREET

Over: PATATO CREEK

078420409, Harrison, IA

Built 1995 Load: 32.7 t ADT: 15

330TH ST

Over: POTATO CREEK

078423003, Harrison, IA

Built 1980 Load: 32.7 t ADT: 29

FM & 296TH ST

Over: HARRIS GROVE CREEK

078431105, Harrison, IA

Built 1900 Load: 32.7 t ADT: 379

LOC MUNICE AVE

Over: SMALL CREEK

078442408, Harrison, IA

Built 1956 Load: 32.7 t ADT: 240

REDWOOD AVE

Over: SIX MILE CREEK

079421108, Harrison, IA

Built 1992 Load: 32.7 t ADT: 45

242 TRAIL

Over: HOG CREEK

079431405, Harrison, IA

Built 1900 Load: 32.7 t ADT: 71

260TH ST

Over: HOG CREEK

079432205, Harrison, IA

Built 1950 Load: 32.7 t ADT: 417

220TH ST

Over: SPOONER DITCH

079440501, Harrison, IA

Built 1970 Load: 32.7 t ADT: 11

235TH ST

Over: SPOONER DITCH

079440703, Harrison, IA

Built 1962 Load: 32.7 t ADT: 15

AUSTIN AVE

Over: OLD SOLDIER DITCH

079441802, Harrison, IA

Built 1984 Load: 32.7 t ADT: 558

LOC 180TH ST

Over: S PICAYUNE CREEK

000000000, Harrison, IA

Built 2009 Load: 32.7 t ADT: 29

FM & 194TH ST

Over: S PICAYUNE CREEK

080412005, Harrison, IA

Built 1979 Load: 32.7 t ADT: 518

210TH TRAIL

Over: SPOONER DITCH

080443104, Harrison, IA

Built 1959 Load: 32.7 t ADT: 29

FM & QUAY AVE

Over: SMALL STREAM

081423406, Harrison, IA

Built 1948 Load: 32.7 t ADT: 40

FM & RACINE TRL

Over: SMALL CREEK

081423603, Harrison, IA

Built 1947 Load: 32.7 t ADT: 71

FM 110TH ST

Over: STRAW CREEK

081431001, Harrison, IA

Built 1900 Load: 32.7 t ADT: 26

193RD LANE

Over: STEER CREEK

080442203, Harrison, IA

Built 1971 Load: 32.7 t ADT: 10

WALDORF AVENUE

Over: CREEK

078411604, Harrison, IA

Built 1950 Load: 32.7 t ADT: 60

KENDRICK AVE

Over: ALLEN CREEK

000000000, Harrison, IA

Built 2010 Load: 32.7 t ADT: 29

LOC SAWYER TR

Over: PICAYUNE CREEK

080410704, Harrison, IA

Built 1977 Load: 32.8 t ADT: 71

QUEBEC PLACE

Over: WILLOW RIVER

081420903, Harrison, IA

Built 1975 Load: 33.5 t ADT: 11

NB I-29

Over: OLD SOLDIER RIVER DITCH

4.0 mi. S of IA 127, Harrison, IA

Built 1967 Load: 33.7 t ADT: 7,600

IA 127 & 183

Over: STEER CREEK

0.5 mi. E of IA 183, Harrison, IA

Built 1968 Load: 34.0 t ADT: 920

US 30

Over: WILLOW CREEK

0.6 MI. E OF JCT. I-29, Harrison, IA

Built 1972 Load: 34.2 t ADT: 10,300

US 30

Over: POWLEY DRAIN DITCH

2.2 mi. E of SR F32, Harrison, IA

Built 1983 Load: 36.3 t ADT: 3,090

US 30

Over: MISSOURI RIVER

AT NEBRASKA STATE LINE, Harrison, IA

Built 1991 Load: 36.7 t ADT: 4,410

BUS BROWN DR

Over: UNNAMED CREEK

East of Lincolnway, Harrison, IA

Built 2015 Load: 37.3 t ADT: 1,225

SB I-29

Over: ALLEN CREEK

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

Built 1967 Load: 38.1 t ADT: 7,750

FM/AUSTIN AVE

Over: SOLDIER RIVER

080451206, Harrison, IA

Built 1957 Load: 38.3 t ADT: 488

235TH ST

Over: ALLEN CREEK

079441003, Harrison, IA

Built 2015 Load: 42.1 t ADT: 25

184TH LANE

Over: STEER CREEK

080441505, Harrison, IA

Built 1969 Load: 44.4 t ADT: 10

US 30

Over: SIX MILE CREEK

0.3 mi. E of IA 44, Harrison, IA

Built 1988 Load: 45.1 t ADT: 4,490

SB I-29

Over: BOYER RIVER

3.0 mi. S of Jct. US 30, Harrison, IA

Built 1958 Load: 47.3 t ADT: 10,050

FM 270TH ST

Over: WILLOW CREEK

079433101, Harrison, IA

Built 1990 Load: 52.7 t ADT: 379

LOC TRACEY AVE

Over: N PICAYUNE CREEK

081413408, Harrison, IA

Built 2003 Load: 55.3 t ADT: 29

IA 44

Over: SIX MILE CREEK

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

Built 1978 Load: 90.5 t ADT: 800

US 30

Over: STREAM

1.5 MI. W OF IA 37, Harrison, IA

Built 1924 Load: 18.1 t ADT: 3,090

IA 183

Over: DITCH

3.3 mi. S of SR F-20, Harrison, IA

Built 2002 Load: 26.1 t ADT: 870

FM-TOLEDO AVE

Over: EAST PICAYUNE CREEK

080410304, Harrison, IA

Built 1977 Load: 30.4 t ADT: 60

FM/CANTON AVE

Over: SOLDIER RIVER

080451402, Harrison, IA

Built 1974 Load: 30.4 t ADT: 29

SPENCER AVE

Over: PIGEON CREEK

078421004, Harrison, IA

Built 2008 Load: 31.9 t ADT: 45

IA 183

Over: COBB CREEK

0.5 MI. N SR F20, Harrison, IA

Built 2017 Load: 32.4 t ADT: 730

LOC TAMA TRAIL

Over: S PICAYUNE CREEK

080412106, Harrison, IA

Built 1998 Load: 32.7 t ADT: 5

RACINE TRAIL

Over: SMALL STREAM

000000000, Harrison, IA

Built 2009 Load: 32.7 t ADT: 139

296TH ST

Over: POTATO CREEK

078420903, Harrison, IA

Built 2007 Load: 32.7 t ADT: 270

EASTON TRAIL

Over: ELK CREEK

080430205, Harrison, IA

Built 2008 Load: 32.7 t ADT: 335

US 30

Over: UPRR

0.8 mi. E of Jct I-29, Harrison, IA

Built 1998 Load: 32.7 t ADT: 10,300

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

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026