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)

NOBLE AVE

Good

Over: MUD CREEK

090440602, Plymouth, IA

Built 2004 Load: 44.4 t ADT: 50

160TH ST

Good

Over: DEEP CREEK

92440301, Plymouth, IA

Built 2015 Load: 44.4 t ADT: 40

130TH ST

Good

Over: BROKEN KETTLE CREEK

934723011040, Plymouth, IA

Built 2013 Load: 44.4 t ADT: 26

260TH ST

Good

Over: MUD CREEK

091442901, Plymouth, IA

Built 1996 Load: 44.5 t ADT: 50

270TH ST

Good

Over: MUD CREEK

091443101, Plymouth, IA

Built 1995 Load: 44.5 t ADT: 60

270TH ST

Good

Over: DRY BRANCH

091443301, Plymouth, IA

Built 1997 Load: 44.5 t ADT: 45

220TH ST

Good

Over: PERRY CREEK

091470101, Plymouth, IA

Built 1997 Load: 44.5 t ADT: 26

TAMARACK AVE

Good

Over: LITTLE SIOUX RIVER

904301021002, Plymouth, IA

Built 2017 Load: 44.7 t ADT: 26

120TH ST

Good

Over: DRAINAGE

93-48-13-01-10-40, Plymouth, IA

Built 2013 Load: 45.0 t ADT: 26

310TH ST

Good

Over: MUDDY CREEK

090452101, Plymouth, IA

Built 1999 Load: 45.4 t ADT: 34

250TH ST

Good

Over: MUD CREEK

091442001, Plymouth, IA

Built 2000 Load: 45.4 t ADT: 190

IDEAL ROAD

Good

Over: DRAINAGE

091461701, Plymouth, IA

Built 2003 Load: 45.4 t ADT: 20

FM

Good

Over: PERRY CREEK

091471201, Plymouth, IA

Built 1995 Load: 45.4 t ADT: 259

NOBLE AVE

Good

Over: PLYMOUTH CREEK

092441902, Plymouth, IA

Built 2000 Load: 45.4 t ADT: 80

LAKE AVE

Good

Over: WEST FORK FLOYD RIVER

093450704, Plymouth, IA

Built 1999 Load: 45.4 t ADT: 26

130TH ST

Good

Over: MINK CREEK

093462101, Plymouth, IA

Built 2002 Load: 45.4 t ADT: 60

LAKE AVE

Good

Over: MINNIE BROOK

090450502, Plymouth, IA

Built 1998 Load: 45.5 t ADT: 50

280TH ST

Good

Over: DRAINAGE

090460201, Plymouth, IA

Built 1990 Load: 45.5 t ADT: 80

270TH ST

Good

Over: DEER CREEK

091433201, Plymouth, IA

Built 1997 Load: 45.5 t ADT: 15

280TH ST

Good

Over: MINNIE BROOK

090450501, Plymouth, IA

Built 2004 Load: 45.7 t ADT: 15

240TH ST

Good

Over: RATHBURN CREEK

091431701, Plymouth, IA

Built 2000 Load: 45.7 t ADT: 34

MARBLE AVE

Good

Over: WHISKEY CREEK

091452302, Plymouth, IA

Built 2003 Load: 45.7 t ADT: 34

270TH ST

Good

Over: PERRY CREEK

9147350120, Plymouth, IA

Built 2018 Load: 45.7 t ADT: 80

DIAMOND AVE

Good

Over: WESTFIELD CREEK

092481502, Plymouth, IA

Built 2002 Load: 45.7 t ADT: 15

130TH ST

Good

Over: MINK CREEK

093462101, Plymouth, IA

Built 2004 Load: 45.7 t ADT: 60

GRANITE AVE

Good

Over: BULL RUN

9247150210, Plymouth, IA

Built 2019 Load: 46.0 t ADT: 26

180TH ST

Good

Over: BR OF WHISKEY CREEK

9243130110, Plymouth, IA

Built 2016 Load: 46.7 t ADT: 15

150TH ST

Good

Over: WOLF CREEK

9345330110, Plymouth, IA

Built 2016 Load: 46.7 t ADT: 71

MARBLE AVE

Good

Over: ELLIOT CREEK

90450210, Plymouth, IA

Built 2020 Load: 48.0 t ADT: 26

190TH ST

Good

Over: BIG WHISKEY SLOUGH

092432301, Plymouth, IA

Built 1990 Load: 48.0 t ADT: 26

FM C-60

Good

Over: DRY BRANCH

090440901, Plymouth, IA

Built 1992 Load: 48.2 t ADT: 439

LAKE AVE

Good

Over: BIG WHISKEY CREEK

090450804, Plymouth, IA

Built 2002 Load: 48.2 t ADT: 71

180TH ST

Good

Over: BIG WHISKEY SLOUGH

092431401, Plymouth, IA

Built 2006 Load: 48.2 t ADT: 15

C66 310TH ST

Good

Over: LITTLE SIOUX RIVER

9043190110, Plymouth, IA

Built 2018 Load: 49.6 t ADT: 309

322ND ST

Good

Over: BR OF W F LITTLE SIOUX

090442503, Plymouth, IA

Built 1998 Load: 49.8 t ADT: 210

QUARTZ AVE

Good

Over: WILLOW CREEK

093440102, Plymouth, IA

Built 1997 Load: 49.8 t ADT: 30

C30 190TH ST

Good

Over: PLYMOUTH CREEK

9244190110, Plymouth, IA

Built 2020 Load: 49.9 t ADT: 789

FM C-60

Good

Over: DEEP CREEK

090430801, Plymouth, IA

Built 1990 Load: 50.0 t ADT: 290

300TH ST

Good

Over: DRY BRANCH

090441601, Plymouth, IA

Built 2002 Load: 50.0 t ADT: 45

NOBLE AVE

Good

Over: MUD CREEK

090441902, Plymouth, IA

Built 2002 Load: 50.0 t ADT: 26

FM C-60

Good

Over: BIG WHISKEY CREEK

090450801, Plymouth, IA

Built 2006 Load: 50.0 t ADT: 628

QUARTZ AVE

Good

Over: CLEAR CREEK

091440102, Plymouth, IA

Built 2000 Load: 50.0 t ADT: 30

250TH ST

Good

Over: PERRY CREEK

091472201, Plymouth, IA

Built 2003 Load: 50.0 t ADT: 45

FM

Good

Over: DEER CREEK

091482204, Plymouth, IA

Built 2003 Load: 50.0 t ADT: 429

NOBLE AVE

Good

Over: PLYMOUTH CREEK

092441902, Plymouth, IA

Built 2000 Load: 50.0 t ADT: 80

FM

Good

Over: BULL RUN

092473201, Plymouth, IA

Built 1995 Load: 50.0 t ADT: 838

260TH ST

Good

Over: CREEK

091462901, Plymouth, IA

Built 2002 Load: 50.2 t ADT: 26

280TH ST

Good

Over: JOHN'S CREEK

090440101, Plymouth, IA

Built 1992 Load: 52.7 t ADT: 5

300TH ST

Good

Over: PERRY CREEK

090471503, Plymouth, IA

Built 1991 Load: 52.7 t ADT: 71

308TH ST

Good

Over: W BR PERRY CREEK

090471603, Plymouth, IA

Built 1998 Load: 52.7 t ADT: 20

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.