Mitchell County, IA

160 public highway bridges

Mitchell County Bridge Snapshot

Mitchell County, Iowa contains 160 public highway bridges in the FHWA National Bridge Inventory. Roughly 47.5% are rated “Good,” 43.1% “Fair,” 9.4% “Poor,” and 9.4% 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.

160

Total Bridges

47.5%

Good

9.4%

Poor

9.4%

Structurally Deficient

Condition Distribution

Good

47.5% (76)

Fair

43.1% (69)

Poor

9.4% (15)

SD

9.4% (15)

All Bridges (160)

Sort:

VALLEY AVE

Over: CREEK

097150302, Mitchell, IA

Built 2002 Load: 32.7 t ADT: 33

NOBLE AVE

Over: CREEK

097161704, Mitchell, IA

Built 2001 Load: 32.7 t ADT: 70

319TH

Over: CREEK

097161807, Mitchell, IA

Built 2003 Load: 32.7 t ADT: 108

316TH

Over: ROCK CREEK

097171705, Mitchell, IA

Built 1990 Load: 32.7 t ADT: 59

340TH

Over: ROCK CREEK

097180103, Mitchell, IA

Built 1977 Load: 32.7 t ADT: 44

UNDERWOOD AVE

Over: SOAP CREEK

098150902, Mitchell, IA

Built 2005 Load: 32.7 t ADT: 33

NOBLE AVE

Over: SPRING CREEK

098163202, Mitchell, IA

Built 2008 Load: 32.7 t ADT: 20

385TH

Over: SUGAR CREEK

098171003, Mitchell, IA

Built 1998 Load: 32.7 t ADT: 285

ECHO AVE

Over: CREEK

098183502, Mitchell, IA

Built 1998 Load: 32.7 t ADT: 33

LOCAL

Over: WAPSIPINICON RIVER

099151501, Mitchell, IA

Built 2006 Load: 32.7 t ADT: 44

TIMBER AVE

Over: BEAVER CREEK

099152902, Mitchell, IA

Built 2004 Load: 32.7 t ADT: 49

TIMBER AVE

Over: BEAVER CREEK

099152902, Mitchell, IA

Built 2000 Load: 32.7 t ADT: 49

QUAIL AVE

Over: CREEK

099160202, Mitchell, IA

Built 2000 Load: 32.7 t ADT: 59

QUAIL AVE

Over: CREEK

099161102, Mitchell, IA

Built 2000 Load: 32.7 t ADT: 79

MARCH AVE

Over: BURR OAK CREEK

099163002, Mitchell, IA

Built 1996 Load: 32.7 t ADT: 33

T28 HICKORY AVE

Over: TURTLE CREEK

United States, Mitchell, IA

Built 2013 Load: 32.7 t ADT: 33

ZINNIA AVE

Over: DEER CREEK

099180604, Mitchell, IA

Built 1999 Load: 32.7 t ADT: 167

ECHO AVE

Over: WILLOW CREEK

099182602, Mitchell, IA

Built 2005 Load: 32.7 t ADT: 70

CAMEO AVE

Over: WILLOW CREEK

099182802, Mitchell, IA

Built 2005 Load: 32.7 t ADT: 59

490TH

Over: WAPSIPINICON RIVER

100152001, Mitchell, IA

Built 1997 Load: 32.7 t ADT: 15

UNDERWOOD AVE

Over: CREEK

100152102, Mitchell, IA

Built 1997 Load: 32.7 t ADT: 26

480TH ST

Over: DRAINAGE

100172801, Mitchell, IA

Built 1997 Load: 32.7 t ADT: 44

HICKORY AVE

Over: DRAINAGE

100173206, Mitchell, IA

Built 1993 Load: 32.7 t ADT: 196

EPIC AVE

Over: CREEK

100182306, Mitchell, IA

Built 1995 Load: 32.7 t ADT: 59

MARCH AVE

Over: SPRING CREEK

098170702, Mitchell, IA

Built 2009 Load: 32.7 t ADT: 138

NOBLE AVE

Over: BURR OAK CREEK

099163202, Mitchell, IA

Built 1973 Load: 33.0 t ADT: 79

380TH

Over: BURR OAK CREEK

098161005, Mitchell, IA

Built 1975 Load: 35.4 t ADT: 44

ECHO AVE

Over: SMALL STREAM

098183502, Mitchell, IA

Built 1987 Load: 35.4 t ADT: 33

BROAD ST

Over: SMALL NATURAL STREAM

000000000, Mitchell, IA

Built 2019 Load: 36.9 t ADT: 1,489

SHADOW AVE

Over: LITTLE CEDAR RIVER

098160106, Mitchell, IA

Built 1995 Load: 37.2 t ADT: 49

485TH

Over: CREEK

100181903, Mitchell, IA

Built 1974 Load: 37.2 t ADT: 33

480TH ST

Over: LITTLE CEDAR RIVER

100163003, Mitchell, IA

Built 2004 Load: 38.5 t ADT: 44

T54 TIMBER AVE

Over: BEAVER CREEK

0.2 mi N of IA 9, Mitchell, IA

Built 2015 Load: 39.2 t ADT: 49

410TH ST

Over: BEAVER CREEK

0.2 Mi W Timber Ave, Mitchell, IA

Built 2018 Load: 39.2 t ADT: 70

390TH

Over: CREEK

098161008, Mitchell, IA

Built 1986 Load: 40.8 t ADT: 39

MONUMENT AVE

Over: SMALL STREAM

100160804, Mitchell, IA

Built 1987 Load: 40.8 t ADT: 786

S70 BALSAM AVE

Over: ROCK CREEK

Balsam and 390th, Mitchell, IA

Built 2022 Load: 41.1 t ADT: 354

490TH

Over: LITTLE CEDAR RIVER

100161903, Mitchell, IA

Built 1989 Load: 41.7 t ADT: 49

A19 UNDERWOOD AVE

Over: WAPSIPINICON RIVER

At 480th & Underwood, Mitchell, IA

Built 2021 Load: 41.8 t ADT: 33

T 40 MONUMENT AVE

Over: CREEK

0.05 miles N of 465th, Mitchell, IA

Built 2022 Load: 42.8 t ADT: 786

IA 9

Over: CEDAR RIVER

2.0 mi. W of W Jct.US 218, Mitchell, IA

Built 1992 Load: 43.7 t ADT: 2,990

320TH ST

Over: CREEK

1/8 Mi. W. of Balsam Ave., Mitchell, IA

Built 2020 Load: 45.7 t ADT: 26

370TH ST

Over: ROCK CREEK

0.4 Mi W Echo Ave, Mitchell, IA

Built 2018 Load: 45.7 t ADT: 29

US 218

Over: STREAM

0.5 mi. N of S.R. A23, Mitchell, IA

Built 1986 Load: 49.0 t ADT: 2,530

IA 9

Over: ROCK CREEK

5.8 MI. W of W Jct US 218, Mitchell, IA

Built 1992 Load: 53.2 t ADT: 2,340

TIMBER AVE

Over: WAPSIPINICON RIVER

100151702, Mitchell, IA

Built 1959 Load: 13.2 t ADT: 29

WALNUT AVE

Over: WAPSIPINICON RIVER

099151402, Mitchell, IA

Built 1940 Load: 16.5 t ADT: 462

LANCER AVE

Over: SMALL NATURAL STREAM

099172406, Mitchell, IA

Built 1925 Load: 16.7 t ADT: 1,011

320TH

Over: LITTLE CEDAR RIVER

097161303, Mitchell, IA

Built 1931 Load: 17.1 t ADT: 226

420TH

Over: BURR OAK CREEK

099172501, Mitchell, IA

Built 1966 Load: 18.3 t ADT: 15

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 5, 2026