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)

IA 3

Fair

Over: BROKEN KETTLE CREEK

2.3 mi. W of SR K22, Plymouth, IA

Built 1975 Load: 36.9 t ADT: 940

IA 140

Fair

Over: CLEAR CREEK

2.8 mi. S of IA 3, Plymouth, IA

Built 1964 Load: 37.0 t ADT: 1,130

IA 3

Fair

Over: STREAM

1.0 mi. W of S.R. K42, Plymouth, IA

Built 1954 Load: 37.6 t ADT: 1,420

FM

Fair

Over: SMALL

090482308, Plymouth, IA

Built 1900 Load: 41.8 t ADT: 628

FM

Fair

Over: PERRY CREEK

091471402, Plymouth, IA

Built 1949 Load: 44.1 t ADT: 1,028

BIG SIOUX RIVER RD

Fair

Over: BIG SIOUX RIVER

0.5 MI. N OF JCT. IA 12, Plymouth, IA

Built 1996 Load: 50.9 t ADT: 1,121

ROOSEVELT AVE

Good

Over: CREEK

090432802, Plymouth, IA

Built 1956 Load: 11.1 t ADT: 20

KEY AVE

Good

Over: BIG WHISKEY CREEK

090453102, Plymouth, IA

Built 1952 Load: 11.7 t ADT: 26

270TH ST

Good

Over: BIG WHISKEY SLOUGH

091433601, Plymouth, IA

Built 1990 Load: 16.9 t ADT: 11

190TH ST

Good

Over: WESTFIELD CREEK

092482001, Plymouth, IA

Built 1990 Load: 18.5 t ADT: 20

EVERGREEN AVE

Good

Over: INDIAN CREEK

093470704, Plymouth, IA

Built 1996 Load: 21.0 t ADT: 5

ACCESS ROAD

Good

Over: STREAM

0.1 mi. S of S.R. C80, Plymouth, IA

Built 2000 Load: 21.1 t ADT: 1,347

FM

Good

Over: PLYMOUTH CREEK

092441602, Plymouth, IA

Built 1975 Load: 21.3 t ADT: 789

190TH ST

Good

Over: DRAINAGE

092432401, Plymouth, IA

Built 1975 Load: 21.4 t ADT: 11

IA 3 & 12

Good

Over: DRAINAGE DITCH

At E jct of Iowa 12, Plymouth, IA

Built 1976 Load: 21.7 t ADT: 2,340

JUNIPER AVE

Good

Over: DRAINAGE

091461404, Plymouth, IA

Built 1990 Load: 21.7 t ADT: 5

IA 60

Good

Over: WOLF CREEK

1.5 mi. N of jct. US 75, Plymouth, IA

Built 2004 Load: 22.4 t ADT: 6,200

IA 3

Good

Over: STREAM

0.9 mi. W of Jct. SR L12, Plymouth, IA

Built 1994 Load: 23.3 t ADT: 3,820

IA 3

Good

Over: WESTFIELD CREEK

2.0 mi E of E Jct IA 12, Plymouth, IA

Built 1975 Load: 23.5 t ADT: 940

IA 3

Good

Over: STREAM

2.0 mi. E of SR K18, Plymouth, IA

Built 1975 Load: 24.5 t ADT: 940

IA 140

Good

Over: DRAINAGE

0.5 mi. N of SR C60, Plymouth, IA

Built 2008 Load: 24.9 t ADT: 970

FM C-60

Good

Over: FLOYD RIVER

090460905, Plymouth, IA

Built 1985 Load: 25.1 t ADT: 1,586

220TH ST

Good

Over: DD

091430301, Plymouth, IA

Built 1900 Load: 25.8 t ADT: 30

SHAMROCK AVE

Good

Over: CREEK

092433402, Plymouth, IA

Built 2000 Load: 26.1 t ADT: 45

100TH ST

Good

Over: DEEP CREEK

093430201, Plymouth, IA

Built 2006 Load: 26.3 t ADT: 11

IA 60

Good

Over: DRAINAGE DITCH

0.4 mi. S of jct. SR C16, Plymouth, IA

Built 2003 Load: 26.6 t ADT: 6,900

IA 3

Good

Over: BIG WHISKEY SLOUGH

0.6 mi W of jct SR L22, Plymouth, IA

Built 1999 Load: 26.7 t ADT: 2,140

200TH ST

Good

Over: CLEAR CREEK

9244251104000, Plymouth, IA

Built 2023 Load: 26.9 t ADT: 45

4TH AVE.E

Good

Over: WILLOW CREEK

000000000, Plymouth, IA

Built 1993 Load: 27.2 t ADT: 851

FM K-42

Good

Over: MINK CREEK

092461502, Plymouth, IA

Built 1985 Load: 27.3 t ADT: 359

120TH ST

Good

Over: MINK CREEK

093461701, Plymouth, IA

Built 1999 Load: 28.2 t ADT: 50

195TH STREET

Good

Over: FLOYD RIVER

092451907, Plymouth, IA

Built 1975 Load: 28.8 t ADT: 60

FAWN AVE

Good

Over: INDIAN CREEK

093471702, Plymouth, IA

Built 1900 Load: 28.8 t ADT: 34

FM C-44

Good

Over: JOHN'S CREEK

091442401, Plymouth, IA

Built 1985 Load: 29.0 t ADT: 150

FM

Good

Over: DEEP CREEK

093433202, Plymouth, IA

Built 1981 Load: 29.0 t ADT: 868

FM C-44

Good

Over: DRY BRANCH

091442101, Plymouth, IA

Built 1998 Load: 29.7 t ADT: 150

FM C-70

Good

Over: BIG WHISKEY CREEK

090453101, Plymouth, IA

Built 1985 Load: 29.8 t ADT: 559

FM C-60

Good

Over: PERRY CREEK

090471101, Plymouth, IA

Built 1984 Load: 29.8 t ADT: 908

FM

Good

Over: INDIAN CREEK

093470801, Plymouth, IA

Built 1984 Load: 29.8 t ADT: 319

FM

Good

Over: DRAINAGE

090432904, Plymouth, IA

Built 1972 Load: 30.0 t ADT: 748

FM C-44

Good

Over: MINNIE BROOK

091450901, Plymouth, IA

Built 1977 Load: 30.0 t ADT: 339

FM

Good

Over: SMALL

093473502, Plymouth, IA

Built 1978 Load: 30.0 t ADT: 878

LAKE AVE

Good

Over: PLYMOUTH CREEK

091450502, Plymouth, IA

Built 1977 Load: 30.2 t ADT: 159

FM C-38

Good

Over: PLYMOUTH CREEK

092453501, Plymouth, IA

Built 1977 Load: 30.2 t ADT: 1,267

FM

Good

Over: SMALL

093461201, Plymouth, IA

Built 1978 Load: 30.4 t ADT: 450

FM K-13

Good

Over: WESTFIELD CREEK

092482902, Plymouth, IA

Built 1988 Load: 30.5 t ADT: 180

FM

Good

Over: W BRANCH FLOYD RIVER

093450803, Plymouth, IA

Built 1976 Load: 30.5 t ADT: 658

FM C-60

Good

Over: KETTLE CREEK

090461101, Plymouth, IA

Built 1969 Load: 30.6 t ADT: 628

FM

Good

Over: BROKEN KETTLE CREEK

090480305, Plymouth, IA

Built 1976 Load: 30.6 t ADT: 489

270TH ST

Good

Over: PERRY CREEK

091473501, Plymouth, IA

Built 1986 Load: 30.6 t ADT: 80

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.