Cass County, IA

237 public highway bridges

Cass County Bridge Snapshot

Cass County, Iowa contains 237 public highway bridges in the FHWA National Bridge Inventory. Roughly 22.4% are rated “Good,” 36.3% “Fair,” 39.7% “Poor,” and 39.7% 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.

237

Total Bridges

22.4%

Good

39.7%

Poor

39.7%

Structurally Deficient

Condition Distribution

Good

22.4% (53)

Fair

36.3% (86)

Poor

39.7% (94)

SD

39.7% (94)

All Bridges (237)

Sort:

YANKTON RD

Over: STALE BRANCH

074343301, Cass, IA

Built 2017 Load: 32.4 t ADT: 30

G53 TUCSON RD

Over: BR W NODAWAY RIVER

074350901, Cass, IA

Built 2018 Load: 32.4 t ADT: 60

560TH ST

Over: WATERWAY

0743704047, Cass, IA

Built 2015 Load: 32.4 t ADT: 269

740TH ST

Over: NODAWAY RIVER

074343302, Cass, IA

Built 2017 Load: 32.4 t ADT: 72

JACKSON RD

Over: SMALL STREAM

076361303, Cass, IA

Built 2015 Load: 32.4 t ADT: 110

LANSING RD

Over: WATERWAY

076373401, Cass, IA

Built 2018 Load: 32.4 t ADT: 120

LANSING RD

Over: WATERWAY

076373502, Cass, IA

Built 2013 Load: 32.4 t ADT: 120

AKRON RD

Over: WATERWAY

077340201, Cass, IA

Built 2017 Load: 32.4 t ADT: 35

G16 BOSTON RD

Over: SMALL CREEK

077350701, Cass, IA

Built 2021 Load: 32.4 t ADT: 131

G 30 WHITE POLE RD

Over: SMALL STREAM

077342203, Cass, IA

Built 1993 Load: 32.7 t ADT: 1,564

FM - JACKSON

Over: CREEK

076342101, Cass, IA

Built 1999 Load: 32.7 t ADT: 131

JACKSON ST

Over: STREAM

075352702, Cass, IA

Built 2007 Load: 32.7 t ADT: 481

LAKE ANITA PARK

Over: STREAM

0.2 MI. W OF JCT. IA 148, Cass, IA

Built 1966 Load: 32.7 t

LOCAL - TROY

Over: SMALL STREAM

074370703, Cass, IA

Built 1986 Load: 33.3 t ADT: 51

LOCAL - 770TH

Over: WATERWAY

077341306, Cass, IA

Built 1985 Load: 33.3 t ADT: 26

G43 NEWPORT RD

Over: WEST NODAWAY CREEK

075341201, Cass, IA

Built 2019 Load: 34.7 t ADT: 29

LOCAL - PELLA

Over: WATERWAY

075342101, Cass, IA

Built 2007 Load: 35.3 t ADT: 15

LOCAL - QUIMBY

Over: NISHNABOTNA RIVER

075373003, Cass, IA

Built 2007 Load: 35.3 t ADT: 100

N28 690TH ST

Over: WHISTLERS BRANCH

074350302, Cass, IA

Built 2016 Load: 36.3 t ADT: 190

FM

Over: TROUBLESOME CREEK

077353007, Cass, IA

Built 2005 Load: 36.6 t ADT: 30

LOCAL

Over: TROUBLESOME CREEK

077353103, Cass, IA

Built 2004 Load: 36.6 t ADT: 15

FM - 710TH

Over: CROOKED CREEK

077351404, Cass, IA

Built 1988 Load: 36.8 t ADT: 5

LOCAL - MEMPHIS

Over: WATERWAY

075340601, Cass, IA

Built 1991 Load: 37.2 t ADT: 21

LOCAL/GRT RIVER

Over: NISHNABOTNA RIVER

077362704, Cass, IA

Built 1991 Load: 37.2 t ADT: 30

INDEPENDENCE RD

Over: INDIAN RIVER

076371701, Cass, IA

Built 2000 Load: 37.6 t ADT: 35

LOCAL

Over: INDIAN CREEK

077371801, Cass, IA

Built 2004 Load: 37.6 t ADT: 40

LOCAL - 665TH

Over: TURKEY CREEK

076350712, Cass, IA

Built 1991 Load: 37.7 t ADT: 62

LOCAL - JASPER

Over: TURKEY CREEK

076362203, Cass, IA

Built 1988 Load: 37.7 t ADT: 91

LOCAL - NSHNA V

Over: NISHNABOTNA RIVER

075371003, Cass, IA

Built 1992 Load: 39.5 t ADT: 82

FM - LANSING

Over: WATERWAY

076363101, Cass, IA

Built 1997 Load: 40.1 t ADT: 34

WB I-80

Over: TROUBLESOME CREEK

4.5 MI. E OF US 71, Cass, IA

Built 2003 Load: 40.5 t ADT: 11,500

570TH ST

Over: SMALL CREEK

077371502, Cass, IA

Built 2014 Load: 42.1 t ADT: 51

VICTORIA RD

Over: SEVEN MILE CREEK

074362001, Cass, IA

Built 2012 Load: 43.7 t ADT: 35

N16 OLIVE ST

Over: BRANCH OF BUCK CREEK

077360902, Cass, IA

Built 2021 Load: 43.7 t ADT: 1,524

G16 BOSTON RD

Over: BRANCH OF BUCK CREEK

077360901, Cass, IA

Built 2022 Load: 44.7 t ADT: 89

LOCAL - QUINCY

Over: CREEK

075362801, Cass, IA

Built 2003 Load: 48.2 t ADT: 15

N16 610TH ST

Over: BEAR BRANCH OF TURKEY CR

075360806, Cass, IA

Built 2022 Load: 48.3 t ADT: 50

620TH ST

Over: TURKEY CREEK

076363302, Cass, IA

Built 2012 Load: 48.6 t ADT: 72

IA 83

Over: DRAINAGE DITCH

0.6 MI. E OF S.R. N28, Cass, IA

Built 1987 Load: 51.0 t ADT: 2,120

FM - LEWIS

Over: WATERWAY

075371504, Cass, IA

Built 1998 Load: 51.6 t ADT: 358

JACKSON RD

Over: TURKEY CREEK

076361406, Cass, IA

Built 2008 Load: 52.9 t ADT: 139

INDIAN CREEK ST

Over: TRIB TO INDIAN CREEK

075370502, Cass, IA

Built 2021 Load: 60.6 t ADT: 71

FAIRVIEW ROAD

Over: SMALL CREEK

077353501, Cass, IA

Built 2022 Load: 72.9 t ADT: 46

FM - JACKSON

Over: WATERWAY

076361406, Cass, IA

Built 1985 Load: 3.4 t ADT: 139

LOCAL

Over: CLARKS CREEK

074373204, Cass, IA

Built 1966 Load: 4.2 t ADT: 5

LOCAL/KEYSTONE

Over: TURKEY CREEK

076362701, Cass, IA

Built 1900 Load: 9.4 t ADT: 35

LOCAL - QUINCY

Over: WATERWAY

075342801, Cass, IA

Built 1967 Load: 10.6 t ADT: 30

LOCAL - 710TH

Over: WATERWAY

075352502, Cass, IA

Built 1955 Load: 11.9 t ADT: 11

LOCAL/FAIRVIEW

Over: STREAM

077373603, Cass, IA

Built 1979 Load: 12.2 t ADT: 15

LOCAL - 660TH

Over: STREAM

074353104, Cass, IA

Built 1981 Load: 12.5 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

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