Winnebago County, IA

48 public highway bridges

Winnebago County Bridge Snapshot

Winnebago County, Iowa contains 48 public highway bridges in the FHWA National Bridge Inventory. Roughly 33.3% are rated “Good,” 33.3% “Fair,” 33.3% “Poor,” and 33.3% 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.

48
Total Bridges
33.3%
Good
33.3%
Poor
33.3%
Structurally Deficient

Condition Distribution

Good
33.3% (16)
Fair
33.3% (16)
Poor
33.3% (16)
SD
33.3% (16)

All Bridges (48)

LOCAL

Fair

Over: N FORK BUFFALO CREEK

098260202, Winnebago, IA

Built 2001 Load: 8.1 t ADT: 30

FM

Fair

Over: N FORK BUFFALO CREEK

098260701, Winnebago, IA

Built 2006 Load: 8.1 t ADT: 26

460TH ST

Fair

Over: DRAINAGE DITCH

099240201, Winnebago, IA

Built 2005 Load: 8.1 t ADT: 62

US 69

Fair

Over: PIKE RUN CREEK

0.5 mi N of N jct IA 9, Winnebago, IA

Built 1968 Load: 22.5 t ADT: 1,650

FM

Fair

Over: DRAINAGE DITCH

099251702, Winnebago, IA

Built 1955 Load: 25.8 t ADT: 90

FM

Fair

Over: WINNEBAGO RIVER

098242301, Winnebago, IA

Built 1974 Load: 30.2 t ADT: 330

FM

Fair

Over: WINNEBAGO RIVER

098240103, Winnebago, IA

Built 1968 Load: 30.8 t ADT: 649

FM

Fair

Over: BEAVER CREEK

099233508, Winnebago, IA

Built 1987 Load: 31.2 t ADT: 848

LOCAL

Fair

Over: BEAVER CREEK

098232601, Winnebago, IA

Built 1991 Load: 36.6 t ADT: 30

IA 9

Fair

Over: DRAINAGE DITCH

0.8 mi. E of E Jct SR R34, Winnebago, IA

Built 1975 Load: 39.2 t ADT: 2,320

FM

Fair

Over: PIKE RUN CREEK

099241502, Winnebago, IA

Built 1990 Load: 45.4 t ADT: 170

20TH AVE

Fair

Over: N FORK BUFFALO CREEK

098260406, Winnebago, IA

Built 1989 Load: 45.5 t ADT: 409

US 69

Fair

Over: WINNEBAGO RIVER

0.1 mi. S of S jct. IA 9, Winnebago, IA

Built 1988 Load: 46.3 t ADT: 5,400

10TH AVE

Fair

Over: N FORK BUFFALO CREEK

098260502, Winnebago, IA

Built 2001 Load: 48.2 t ADT: 279

FM

Fair

Over: WINNEBAGO RIVER

100232103, Winnebago, IA

Built 2002 Load: 50.0 t ADT: 270

US 69 & IA 9

Fair

Over: WINNEBAGO RIVER

2.2 mi. N of S.R. A44, Winnebago, IA

Built 1988 Load: 55.3 t ADT: 2,960

160TH AVE

Good

Over: PIKE RUN

099241402, Winnebago, IA

Built 2022 Load: 32.4 t ADT: 30

FM

Good

Over: TWISTER BRANCH

098242701, Winnebago, IA

Built 2011 Load: 32.7 t ADT: 45

FM

Good

Over: BUFFALO CREEK

098263601, Winnebago, IA

Built 2010 Load: 32.7 t ADT: 439

LOCAL

Good

Over: BLUE EARTH RIVER

099260702, Winnebago, IA

Built 2010 Load: 32.7 t ADT: 46

10TH AVE

Good

Over: BLUE EARTH RIVER

099260802, Winnebago, IA

Built 2011 Load: 32.7 t ADT: 120

A34 (420TH ST)

Good

Over: PIKE RUN CREEK

0.5 mi. E. of HWY 9, Winnebago, IA

Built 2014 Load: 35.6 t ADT: 100

LOCAL

Good

Over: N FORK BUFFALO CREEK

098261801, Winnebago, IA

Built 2011 Load: 35.7 t ADT: 71

200TH AVE

Good

Over: WINNEBAGO RIVER

100232804, Winnebago, IA

Built 2015 Load: 36.3 t ADT: 11

LOCAL

Good

Over: WINNEBAGO RIVER

099230501, Winnebago, IA

Built 2011 Load: 39.5 t ADT: 35

350TH ST

Good

Over: BUFFALO CREEK

098263401, Winnebago, IA

Built 2020 Load: 40.5 t ADT: 21

440TH ST

Good

Over: WINNEBAGO RIVER

099231701, Winnebago, IA

Built 2012 Load: 41.8 t ADT: 41

LOCAL

Good

Over: PIKE RUN

099252402, Winnebago, IA

Built 2005 Load: 48.0 t ADT: 26

30TH AVE

Good

Over: N FORK BUFFALO CREEK

098260302, Winnebago, IA

Built 2000 Load: 49.8 t ADT: 21

FM

Good

Over: WINNEBAGO RIVER

099242503, Winnebago, IA

Built 1989 Load: 55.9 t ADT: 90

LOCAL

Good

Over: WINNEBAGO RIVER

099243601, Winnebago, IA

Built 1993 Load: 55.9 t ADT: 30

140TH AVE

Good

Over: PIKE RUN

099241602, Winnebago, IA

Built 2019 Load: 90.1 t ADT: 26

LOCAL

Poor

Over: DRAINAGE DITCH

099240301, Winnebago, IA

Built 1976 Load: 9.1 t ADT: 72

LOCAL

Poor

Over: DRAINAGE DITCH

099263402, Winnebago, IA

Built 1964 Load: 14.9 t ADT: 20

LOCAL

Poor

Over: BEAVER CREEK

098230101, Winnebago, IA

Built 1985 Load: 19.3 t ADT: 35

LOCAL

Poor

Over: BUFFALO CREEK

098252002, Winnebago, IA

Built 1975 Load: 21.0 t ADT: 26

LOCAL

Poor

Over: DRAINAGE DITCH

098240301, Winnebago, IA

Built 1928 Load: 21.9 t ADT: 82

LOCAL

Poor

Over: N BUFFALO CREEK

100253602, Winnebago, IA

Built 1949 Load: 24.1 t ADT: 11

LOCAL

Poor

Over: BEAVER CREEK

099233501, Winnebago, IA

Built 1976 Load: 24.7 t ADT: 41

LOCAL

Poor

Over: DRAINAGE DITCH

098250601, Winnebago, IA

Built 1950 Load: 25.8 t ADT: 35

LOCAL

Poor

Over: DRAINAGE DITCH

098260401, Winnebago, IA

Built 1985 Load: 29.3 t ADT: 26

LOCAL

Structurally Deficient

Over: N FORK BUFFALO CREEK

099262501, Winnebago, IA

Built 1900 ADT: 5

LOCAL

Structurally Deficient

Over: PIKE RUN

099241701, Winnebago, IA

Built 1976 Load: 3.4 t ADT: 11

FM

Structurally Deficient

Over: DRAINAGE DITCH

099252902, Winnebago, IA

Built 1955 Load: 6.5 t ADT: 34

135TH AVE

Structurally Deficient

Over: TWISTER BRANCH

089242901, Winnebago, IA

Built 1999 Load: 9.1 t ADT: 11

LOCAL

Structurally Deficient

Over: PIKE RUN

099252401, Winnebago, IA

Built 1976 Load: 10.2 t ADT: 5

LOCAL

Structurally Deficient

Over: DRAINAGE DITCH

100231602, Winnebago, IA

Built 1966 Load: 12.2 t ADT: 41

LOCAL

Structurally Deficient

Over: N BUFFALO CREEK

100243102, Winnebago, IA

Built 1949 Load: 14.9 t ADT: 5

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