O'Brien County, IA

229 public highway bridges

O'Brien County Bridge Snapshot

O'Brien County, Iowa contains 229 public highway bridges in the FHWA National Bridge Inventory. Roughly 52.4% are rated “Good,” 40.6% “Fair,” 4.8% “Poor,” and 4.8% 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.

229
Total Bridges
52.4%
Good
4.8%
Poor
4.8%
Structurally Deficient

Condition Distribution

Good
52.4% (120)
Fair
40.6% (93)
Poor
4.8% (11)
SD
4.8% (11)

All Bridges (229)

LOCAL

Fair

Over: LAKE CREEK

095400902, O'Brien, IA

Built 2006 Load: 22.7 t ADT: 30

LOCAL

Fair

Over: SWEENEY CREEK

096 42 02 01, O'Brien, IA

Built 2013 Load: 22.7 t ADT: 50

LOCAL

Fair

Over: FLOYD RIVER OVERFLOW

097421502, O'Brien, IA

Built 1933 Load: 22.7 t ADT: 26

LOCAL

Fair

Over: MUD CREEK

094410502, O'Brien, IA

Built 1950 Load: 23.3 t ADT: 72

LOCAL

Fair

Over: FLOYD RIVER

097410702, O'Brien, IA

Built 1939 Load: 23.7 t ADT: 26

LOCAL

Fair

Over: W BR MILL CREEK

096413201, O'Brien, IA

Built 1947 Load: 24.0 t ADT: 30

LOCAL

Fair

Over: MILL CREEK

094412901, O'Brien, IA

Built 1970 Load: 24.9 t ADT: 46

LOCAL

Fair

Over: LAKE CREEK

095400801, O'Brien, IA

Built 1979 Load: 24.9 t ADT: 26

US 59

Fair

Over: BRANCH FLOYD RIVER

1.9 mi. N of N jct. US 18, O'Brien, IA

Built 1976 Load: 25.1 t ADT: 1,320

LOCAL

Fair

Over: W BR MILL CREEK

096413301, O'Brien, IA

Built 1928 Load: 25.3 t ADT: 15

FM

Fair

Over: SMALL UN-NAMED CREEK

097391202, O'Brien, IA

Built 1935 Load: 25.3 t ADT: 34

FM

Fair

Over: HENRY CREEK

094392405, O'Brien, IA

Built 1950 Load: 25.9 t ADT: 45

LOCAL

Fair

Over: WILLOW CR

094412501, O'Brien, IA

Built 1978 Load: 26.6 t ADT: 11

FM

Fair

Over: FLOYD RIVER

097411001, O'Brien, IA

Built 1969 Load: 26.6 t ADT: 45

FM

Fair

Over: LITTLE FLOYD RIVER

097413102, O'Brien, IA

Built 1968 Load: 26.6 t ADT: 409

US 59

Fair

Over: MILL CREEK

4.2 mi. N of N Jct IA 10, O'Brien, IA

Built 1973 Load: 27.7 t ADT: 940

FM

Fair

Over: NO FOLK FLOYD RIVER

097410901, O'Brien, IA

Built 1994 Load: 28.2 t ADT: 71

FM

Fair

Over: MILL CREEK

095410401, O'Brien, IA

Built 1984 Load: 29.0 t ADT: 1,087

FM

Fair

Over: DRY RUN

095412702, O'Brien, IA

Built 1961 Load: 30.4 t ADT: 917

FM

Fair

Over: LITTLE FLOYD RIVER

096420610, O'Brien, IA

Built 1963 Load: 30.4 t ADT: 609

FM

Fair

Over: MUD CREEK

094411701, O'Brien, IA

Built 1968 Load: 30.6 t ADT: 71

LOCAL SEC RD

Fair

Over: BARRY CREEK

095392102, O'Brien, IA

Built 1900 Load: 32.4 t ADT: 41

LOCAL

Fair

Over: SMALL UN-NAMED CREEK

094403102, O'Brien, IA

Built 1974 Load: 32.7 t ADT: 62

LOCAL

Fair

Over: SMALL UN-NAMED CREEK

094403202, O'Brien, IA

Built 1973 Load: 32.7 t ADT: 35

LOCAL

Fair

Over: W BR WHISKEY CREEK

094413102, O'Brien, IA

Built 1978 Load: 32.7 t ADT: 21

LOCAL

Fair

Over: BARRY CREEK

095392801, O'Brien, IA

Built 1980 Load: 32.7 t ADT: 41

LOCAL

Fair

Over: MCCREATH CREEK

095392801, O'Brien, IA

Built 1980 Load: 32.7 t ADT: 41

FM

Fair

Over: STOFFERAN CREEK

095420301, O'Brien, IA

Built 1971 Load: 32.7 t ADT: 968

FM

Fair

Over: WILLOW CREEK

095420801, O'Brien, IA

Built 1972 Load: 32.7 t ADT: 828

FM

Fair

Over: LITTLE WATERMAN CREEK

096402301, O'Brien, IA

Built 1955 Load: 32.7 t ADT: 300

FM

Fair

Over: WATERMAN CREEK

097401101, O'Brien, IA

Built 2004 Load: 32.7 t ADT: 30

FM

Fair

Over: ENGELS CREEK

097422302, O'Brien, IA

Built 1925 Load: 32.7 t ADT: 199

ORIOLE AVE

Fair

Over: GRASS WATERWAY

096410702, O'Brien, IA

Built 1965 Load: 32.7 t ADT: 409

US 18

Fair

Over: STREAM

1.6 mi. W of jct. SR M12, O'Brien, IA

Built 1958 Load: 32.7 t ADT: 3,530

FM

Fair

Over: MUD CREEK

094420302, O'Brien, IA

Built 2002 Load: 34.0 t ADT: 878

330TH ST

Fair

Over: LITTLE FLOYD RIVER

096 42 01 10, O'Brien, IA

Built 2011 Load: 34.0 t ADT: 46

IA 10

Fair

Over: DRY RUN

0.2 mi. W of W jct. US 59, O'Brien, IA

Built 1969 Load: 35.6 t ADT: 1,610

FM

Fair

Over: MILL CREEK

094411501, O'Brien, IA

Built 1970 Load: 37.7 t ADT: 71

FM

Fair

Over: MILL CREEK

094413402, O'Brien, IA

Built 1979 Load: 38.2 t ADT: 538

FM

Fair

Over: WHISKEY CREEK

094413201, O'Brien, IA

Built 1990 Load: 38.6 t ADT: 159

FM

Fair

Over: GINGER CREEK

095402901, O'Brien, IA

Built 1928 Load: 39.9 t ADT: 180

FM

Fair

Over: STOFFERAN CREEK

095420302, O'Brien, IA

Built 1976 Load: 41.8 t ADT: 1,277

FM

Fair

Over: WATERMAN CREEK

097400102, O'Brien, IA

Built 1977 Load: 41.8 t ADT: 309

LOCAL

Fair

Over: SEWER CREEK

096390102, O'Brien, IA

Built 1983 Load: 42.1 t ADT: 30

LOCAL SEC RD

Fair

Over: LANGE CREEK NORTH

094422402, O'Brien, IA

Built 1998 Load: 43.3 t ADT: 26

OAK HILL AVE

Fair

Over: LITTLE FLOYD RIVER

96240201, O'Brien, IA

Built 2020 Load: 43.9 t ADT: 26

LOCAL

Fair

Over: MILL CREEK

096412601, O'Brien, IA

Built 1989 Load: 48.0 t ADT: 21

FM

Fair

Over: WILLOW CREEK

094413601, O'Brien, IA

Built 2003 Load: 52.9 t ADT: 259

420TH ST

Good

Over: BARRY CREEK

095 39 20 01, O'Brien, IA

Built 2011 Load: 18.8 t ADT: 71

LOCAL

Good

Over: WEST BRANCH MILL CREEK

096412901, O'Brien, IA

Built 1966 Load: 20.1 t ADT: 46

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