Plymouth County, IA

407 public highway bridges

Plymouth County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Plymouth County, Iowa contains 407 public highway bridges. Roughly 51.8% are rated “Good,” 24.6% “Fair,” and 22.1% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

407
Total Bridges
51.8%
Good
24.6%
Fair
22.1%
Poor Condition

Condition Distribution

Good
51.8% (211)
Fair
24.6% (100)
Poor
22.1% (90)

All Bridges (407)

270TH ST

Good

Over: CLEAR CREEK

091443501, Plymouth, IA

Built 1991 Load: 52.7 t ADT: 26

120TH ST

Good

Over: WILLOW CREEK

093441501, Plymouth, IA

Built 1989 Load: 52.7 t ADT: 5

PIONEER AVE

Good

Over: WILLOW CREEK

093441502, Plymouth, IA

Built 1990 Load: 52.7 t ADT: 15

C70

Good

Over: MUD CREEK

090443101, Plymouth, IA

Built 1999 Load: 52.9 t ADT: 450

280TH ST

Good

Over: PERRY CREEK

090470201, Plymouth, IA

Built 2005 Load: 52.9 t ADT: 11

325TH ST

Good

Over: PERRY CREEK

090472705, Plymouth, IA

Built 2006 Load: 52.9 t ADT: 319

FM

Good

Over: LITTLE SIOUX

091432301, Plymouth, IA

Built 1991 Load: 52.9 t ADT: 139

220TH ST

Good

Over: PLYMOUTH CREEK

091450301, Plymouth, IA

Built 2004 Load: 52.9 t ADT: 15

FM

Good

Over: WHISKEY CREEK

092433501, Plymouth, IA

Built 1997 Load: 52.9 t ADT: 848

160TH ST

Good

Over: MINK CREEK

092460301, Plymouth, IA

Built 2003 Load: 52.9 t ADT: 26

FM

Good

Over: WESTFIELD CREEK

092481702, Plymouth, IA

Built 1988 Load: 52.9 t ADT: 180

140TH ST

Good

Over: DEEP CREEK

093432801, Plymouth, IA

Built 2001 Load: 52.9 t ADT: 30

150TH ST

Good

Over: DEEP CREEK

093433201, Plymouth, IA

Built 2004 Load: 52.9 t ADT: 60

140TH ST

Good

Over: WILLOW CREEK

093442901, Plymouth, IA

Built 2000 Load: 52.9 t ADT: 20

150TH ST

Good

Over: WILLOW CREEK

093443101, Plymouth, IA

Built 1992 Load: 52.9 t ADT: 71

C44 230TH ST

Good

Over: FLOYD RIVER

9146110310, Plymouth, IA

Built 2019 Load: 56.7 t ADT: 439

FM C-38

Good

Over: WESTFIELD CREEK

092493601, Plymouth, IA

Built 1987 Load: 57.5 t ADT: 589

165TH ST

Poor

Over: WEST BRANCH FLOYD RIVER

092450603, Plymouth, IA

Built 1911 Load: 4.5 t ADT: 120

PIONEER AVE

Poor

Over: DEEP CREEK

092440302, Plymouth, IA

Built 1917 Load: 5.9 t ADT: 30

120TH ST

Poor

Over: W BR FLOYD RIVER

093451803, Plymouth, IA

Built 1941 Load: 6.2 t ADT: 20

140TH ST

Poor

Over: FLOYD RIVER

093452605, Plymouth, IA

Built 1954 Load: 6.4 t ADT: 60

GRANITE AVE

Poor

Over: BROKEN KETTLE CREEK

093473402, Plymouth, IA

Built 1900 Load: 7.0 t ADT: 34

FIR AVE

Poor

Over: BROKEN KETTLE CREEK

092470402, Plymouth, IA

Built 1900 Load: 7.7 t ADT: 30

BLUEBIRD AVE

Poor

Over: DRAINAGE

092483102, Plymouth, IA

Built 1949 Load: 7.7 t ADT: 20

130TH ST

Poor

Over: W BR FLOYD RIVER

093451901, Plymouth, IA

Built 1900 Load: 8.1 t ADT: 20

LYNX AVE

Poor

Over: PLYMOUTH CREEK

091450402, Plymouth, IA

Built 1960 Load: 8.7 t ADT: 26

320TH ST

Poor

Over: BIG WHISKEY CREEK

090453001, Plymouth, IA

Built 1900 Load: 8.8 t ADT: 11

DOGWOOD AVE

Poor

Over: DRAINAGE

092482602, Plymouth, IA

Built 1970 Load: 9.5 t ADT: 15

EVERGREEN AVE

Poor

Over: INDIAN CREEK

093470702, Plymouth, IA

Built 1961 Load: 10.2 t ADT: 5

300TH ST

Poor

Over: JOHN'S CREEK

090441301, Plymouth, IA

Built 1900 Load: 10.5 t ADT: 26

260TH

Poor

Over: JOHN'S CREEK

091442601, Plymouth, IA

Built 1966 Load: 10.6 t ADT: 11

170TH ST

Poor

Over: DRAINAGE

092460801, Plymouth, IA

Built 1900 Load: 10.7 t ADT: 34

310TH ST

Poor

Over: DRY BRANCH

090441901, Plymouth, IA

Built 1941 Load: 10.8 t ADT: 26

FM K-42

Poor

Over: CARTER CREEK

090460202, Plymouth, IA

Built 1941 Load: 10.8 t ADT: 190

LOCAL

Poor

Over: DEEP CREEK

093431001, Plymouth, IA

Built 1941 Load: 10.8 t ADT: 11

FAWN AVE

Poor

Over: DRAINAGE

092470802, Plymouth, IA

Built 1900 Load: 11.0 t ADT: 30

200TH ST

Poor

Over: W.BRANCH FLOYD RIVER

092462603, Plymouth, IA

Built 1960 Load: 11.1 t ADT: 71

EVERGREEN AVE

Poor

Over: DRAINAGE

091471902, Plymouth, IA

Built 1900 Load: 11.3 t ADT: 11

LONE TREE RD

Poor

Over: PERRY CREEK

090472205, Plymouth, IA

Built 1953 Load: 11.4 t ADT: 71

120TH ST

Poor

Over: INDIAN CREEK

093471801, Plymouth, IA

Built 1900 Load: 11.4 t ADT: 15

280TH ST

Poor

Over: DRY BRANCH

090440401, Plymouth, IA

Built 1900 Load: 12.2 t ADT: 11

310TH ST

Poor

Over: CREEK

090442001, Plymouth, IA

Built 1900 Load: 12.2 t ADT: 30

NOBLE AVE

Poor

Over: DEEP CREEK

093443104, Plymouth, IA

Built 1953 Load: 12.6 t ADT: 30

280TH ST

Poor

Over: MUD CREEK

090440601, Plymouth, IA

Built 1900 Load: 13.0 t ADT: 26

140TH ST

Poor

Over: DRAINAGE

093432901, Plymouth, IA

Built 1961 Load: 13.4 t ADT: 30

200TH ST

Poor

Over: MINK CREEK

092462701, Plymouth, IA

Built 1953 Load: 14.1 t ADT: 34

QUARTZ AVE

Poor

Over: WILLOW CREEK

093441202, Plymouth, IA

Built 1946 Load: 14.3 t ADT: 60

CONCORD AVE

Poor

Over: UNNAMED CREEK

092481602, Plymouth, IA

Built 1949 Load: 14.5 t ADT: 11

320TH ST

Poor

Over: CREEK

090442701, Plymouth, IA

Built 1900 Load: 14.7 t ADT: 30

LYNX AVE

Poor

Over: BIG WHISKEY CREEK

090450402, Plymouth, IA

Built 1958 Load: 14.7 t ADT: 50

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.