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)

Sort:

200TH STREET

Over: IA 75

1.0 mi. N of jct. SR C38, Plymouth, IA

Built 2006 ADT: 7,300

IOWA 3

Over: US 75 (LEMARS BYPASS)

At the Jct. U.S. 75, Plymouth, IA

Built 2005 ADT: 5,800

US 75 NB

Over: IA 60

At jct. IA 60, Plymouth, IA

Built 2005 ADT: 2,085

US 75 SB

Over: IA 60

At jct. Iowa 60, Plymouth, IA

Built 2005 ADT: 2,085

US 75 NB

Over: LAKE AVENUE

1.1 mi S of jct IA 60, Plymouth, IA

Built 2006 ADT: 50

US 75 SB

Over: LAKE AVENUE

1.1 mi S of jct IA 60, Plymouth, IA

Built 2006 ADT: 50

NB US 75

Over: DRY CREEK

2.3 mi N of SR C60, Plymouth, IA

Built 1972 ADT: 7,000

NB US 75

Over: DRY CREEK

3.4 mi. N of jct. SR C60, Plymouth, IA

Built 1972 ADT: 7,000

NB US 75

Over: DRY CREEK

1.5 mi. S of SR C44, Plymouth, IA

Built 1972 ADT: 7,000

NATURE AVE

Over: PLYMOUTH CREEK

092452502, Plymouth, IA

Built 1940 Load: 13.5 t ADT: 45

NB US 75

Over: FLAT CREEK

1.2 mi. S of SR C44, Plymouth, IA

Built 1972 Load: 13.8 t ADT: 7,000

180TH ST

Over: WESTFIELD CREEK

092481701, Plymouth, IA

Built 1900 Load: 14.0 t ADT: 11

JADE AVE

Over: DRAINAGE

090460304, Plymouth, IA

Built 1989 Load: 14.4 t ADT: 50

300TH ST

Over: DEER CREEK

090431701, Plymouth, IA

Built 1990 Load: 15.1 t ADT: 30

200TH ST

Over: BROKEN KETTLE CREEK

092482501, Plymouth, IA

Built 1972 Load: 15.2 t ADT: 20

250TH ST

Over: DRAINAGE

091472103, Plymouth, IA

Built 1978 Load: 15.5 t ADT: 15

190TH ST

Over: WESTFIELD CREEK

092492404, Plymouth, IA

Built 1962 Load: 15.5 t ADT: 15

150TH ST

Over: W BR FLOYD RIVER

093453101, Plymouth, IA

Built 1963 Load: 15.5 t ADT: 50

110TH ST

Over: FLOYD RIVER

093440703, Plymouth, IA

Built 1940 Load: 16.3 t ADT: 60

FIR AVE

Over: BULL RUN

092472802, Plymouth, IA

Built 1949 Load: 16.8 t ADT: 26

FM K-18

Over: BROKEN KETTLE CREEK

091482706, Plymouth, IA

Built 1979 Load: 17.0 t ADT: 490

FM

Over: MINK CREEK

093462202, Plymouth, IA

Built 1961 Load: 17.0 t ADT: 559

IA 12

Over: DRAINAGE DITCH

1.5 mi S of S jct SR K18, Plymouth, IA

Built 1957 Load: 17.1 t ADT: 1,840

IA 12

Over: DRAINAGE DITCH

2.0 mi. S of S jct SR K18, Plymouth, IA

Built 1957 Load: 17.2 t ADT: 1,840

LOCAL

Over: DEEP CREEK

092430604, Plymouth, IA

Built 1953 Load: 17.5 t ADT: 609

160TH ST

Over: BROKEN KETTLE CREEK

092470401, Plymouth, IA

Built 1964 Load: 17.6 t ADT: 20

FM

Over: MINK CREEK

093462702, Plymouth, IA

Built 1961 Load: 17.6 t ADT: 628

DOGWOOD AVE

Over: INDIAN CREEK

093481102, Plymouth, IA

Built 1984 Load: 17.7 t ADT: 11

NB US 75

Over: STREAM

1.3 mi N of SR C60, Plymouth, IA

Built 1950 Load: 18.1 t ADT: 7,000

IA 140

Over: DRAINAGE

1.4 S of S.R. C38, Plymouth, IA

Built 1963 Load: 18.1 t ADT: 970

SB US 75

Over: DRAINAGE DITCH

3.0 mi. N of SR C60, Plymouth, IA

Built 1948 Load: 18.9 t ADT: 7,000

FM C-44

Over: SMALL

091452301, Plymouth, IA

Built 1978 Load: 19.0 t ADT: 190

FM K-42

Over: MINK CREEK

092460304, Plymouth, IA

Built 1961 Load: 19.0 t ADT: 628

FM

Over: MINK CREEK

093463402, Plymouth, IA

Built 1961 Load: 19.0 t ADT: 628

NB US 75

Over: DRAINAGE DITCH

2.6 mi. S of SR C44, Plymouth, IA

Built 1972 Load: 20.1 t ADT: 7,000

NATURE AVE

Over: PLYMOUTH CREEK

092453602, Plymouth, IA

Built 1900 Load: 21.0 t ADT: 100

FM C-70

Over: WEST FORK LITTLE SIOUX

090443503, Plymouth, IA

Built 1961 Load: 21.1 t ADT: 459

FM

Over: BULL RUN CREEK

092483601, Plymouth, IA

Built 1960 Load: 21.2 t ADT: 838

FM C-16

Over: DEEP CREEK

093432101, Plymouth, IA

Built 1960 Load: 21.4 t ADT: 409

FM

Over: MINK CREEK

093461502, Plymouth, IA

Built 1961 Load: 21.5 t ADT: 559

NB US 75

Over: DRAINAGE DITCH

3.0 mi. N of Jct. SR C60, Plymouth, IA

Built 1972 Load: 21.6 t ADT: 7,000

240TH ST

Over: DRY BRANCH

091441601, Plymouth, IA

Built 1900 Load: 22.0 t ADT: 71

LOCAL

Over: CLEAR CREEK

092433002, Plymouth, IA

Built 1959 Load: 22.3 t ADT: 399

280TH ST

Over: DEER CREEK

090430501, Plymouth, IA

Built 1956 Load: 22.5 t ADT: 11

JUNIPER AVE

Over: DRAINAGE

092461402, Plymouth, IA

Built 1900 Load: 22.5 t ADT: 20

FM C-44

Over: BROKEN KETTLE CREEK

091481105, Plymouth, IA

Built 1965 Load: 22.6 t ADT: 120

FM

Over: W BR FLOYD RIVER

093453001, Plymouth, IA

Built 1968 Load: 22.6 t ADT: 270

SUNSET AVE

Over: DD

091430202, Plymouth, IA

Built 1950 Load: 22.8 t ADT: 30

150TH ST

Over: MINK CREEK

093463301, Plymouth, IA

Built 1961 Load: 22.8 t ADT: 26

US 75

Over: STREAM

0.1 mi S of Jct. SR C80, Plymouth, IA

Built 1999 Load: 23.0 t ADT: 18,200

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

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