Polk County, IA

415 public highway bridges

Polk County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Polk County, Iowa contains 415 public highway bridges. Roughly 35.4% are rated “Good,” 25.3% “Fair,” and 6% “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.

415
Total Bridges
35.4%
Good
25.3%
Fair
6%
Poor Condition

Condition Distribution

Good
35.4% (147)
Fair
25.3% (105)
Poor
6% (25)

All Bridges (415)

NB US 65

Good

Over: DRAINAGE DITCH

4.4 MILES N OF N JCT I-80, Polk, IA

Built 1979 Load: 40.5 t ADT: 8,200

NW 128TH ST SB

Good

Over: WALNUT CREEK

079253200, Polk, IA

Built 1998 Load: 40.5 t ADT: 7,065

NW 128TH ST NB

Good

Over: WALNUT CREEK

079253200, Polk, IA

Built 2007 Load: 40.5 t ADT: 6,875

EB IA 163

Good

Over: CAMP CREEK

6.9 mi. E of Jct. US 65, Polk, IA

Built 2007 Load: 40.9 t ADT: 6,300

WB IA 163

Good

Over: CAMP CREEK

6.9 mi. E of Jct. U.S. 65, Polk, IA

Built 2007 Load: 40.9 t ADT: 6,300

NE 36TH

Good

Over: OTTER CREEK

080230700, Polk, IA

Built 1982 Load: 40.9 t ADT: 6,694

FM

Good

Over: FOUR MILE CREEK

079231701, Polk, IA

Built 1991 Load: 42.1 t ADT: 1,504

COWLES DRIVE

Good

Over: GARAGE ENTRY LANE

0.3 mi. N of Entrance, Polk, IA

Built 2023 Load: 42.1 t

EB I-235

Good

Over: UP RR

1.3 MILES E OF JCT US 6, Polk, IA

Built 2006 Load: 42.9 t ADT: 25,550

NW 70TH AVENUE

Good

Over: BEAVER CREEK

000000000, Polk, IA

Built 1994 Load: 43.1 t ADT: 5,205

UNIVSITY RAMP A

Good

Over: UPRR

0.2 MILES E OF JCT IA 163, Polk, IA

Built 2001 Load: 43.1 t ADT: 2,300

VANDALIA RD

Good

Over: DRAINAGE

078231600, Polk, IA

Built 2020 Load: 43.1 t ADT: 6,300

IA 415

Good

Over: ROCK CREEK

1.9 MILES N OF JCT IA 160, Polk, IA

Built 1993 Load: 43.9 t ADT: 9,100

WB I-235

Good

Over: UP RR

1.3 MILES E OF JCT US 6, Polk, IA

Built 2006 Load: 44.1 t ADT: 25,550

FM

Good

Over: DES MOINES RIVER

NW 66th over Des Moines, Polk, IA

Built 2016 Load: 44.4 t ADT: 11,354

NE 150TH AVE

Good

Over: SKUNK RIVER

081231401, Polk, IA

Built 2012 Load: 44.4 t ADT: 142

NW 72ND PLACE

Good

Over: CREEK

080243409, Polk, IA

Built 2015 Load: 45.4 t ADT: 338

S.W.3RD ST

Good

Over: RACCOON RIVER

078240900, Polk, IA

Built 1995 Load: 46.0 t ADT: 8,948

FM

Good

Over: CAMP CREEK

078222403, Polk, IA

Built 1993 Load: 46.7 t ADT: 150

E MLK JR PKWY

Good

Over: NS RR

078240207, Polk, IA

Built 2016 Load: 46.7 t ADT: 14,883

E MLK JR PKWY

Good

Over: UP RR

078240207, Polk, IA

Built 2016 Load: 46.7 t ADT: 14,883

MLK EB

Good

Over: DES MOINES RIVER

078240800, Polk, IA

Built 2010 Load: 46.9 t ADT: 4,276

MLK WB

Good

Over: DES MOINES RIVER

078240800, Polk, IA

Built 2010 Load: 46.9 t ADT: 4,079

LOCAL ROAD

Good

Over: DEER CREEK

080231701, Polk, IA

Built 2003 Load: 47.0 t ADT: 50

LOCAL ROAD

Good

Over: BIG CREEK

081250401, Polk, IA

Built 1992 Load: 47.3 t ADT: 60

FM

Good

Over: LITTLE CREEK

081251601, Polk, IA

Built 1986 Load: 47.3 t ADT: 79

NB US 65

Good

Over: OVER 4 MI. CK & IAIS RR

2.9 MILES S OF JCT I-80, Polk, IA

Built 1994 Load: 48.3 t ADT: 14,300

NB US 65

Good

Over: DES MOINES RIVER

2.6 MI. S OF JCT. IA 163, Polk, IA

Built 1997 Load: 48.3 t ADT: 12,450

LOCAL

Good

Over: MUD CREEK

078220404, Polk, IA

Built 1990 Load: 49.2 t ADT: 71

FM

Good

Over: CAMP CREEK

078221103, Polk, IA

Built 1985 Load: 49.2 t ADT: 110

FM

Good

Over: BIG CREEK

081250901, Polk, IA

Built 1990 Load: 49.2 t ADT: 150

SE 6TH AVE

Good

Over: TRIB TO MUD CREEK

078221001, Polk, IA

Built 2000 Load: 49.3 t ADT: 159

NB I-35,EB I-80

Good

Over: UP RR

0.5 mi. E of jct. US 69, Polk, IA

Built 2000 Load: 49.4 t ADT: 41,550

UNIVERSITY AVE

Good

Over: NORTH WALNUT CREEK

078250300, Polk, IA

Built 1983 Load: 49.5 t ADT: 11,490

OLD IA 950 FM

Good

Over: E FOURMILE CK

079233510, Polk, IA

Built 1987 Load: 50.0 t ADT: 8,366

32ND ST SE

Good

Over: MUD CREEK

079220700, Polk, IA

Built 2005 Load: 50.2 t ADT: 530

SB US 65

Good

Over: DES MONES RIVER

2.6 MI. S OF JCT. IA 163, Polk, IA

Built 1997 Load: 50.4 t ADT: 12,300

I 35

Good

Over: TRIB TO FOUR MILE CREEK

0.8 MI. N OF E 1ST ST, Polk, IA

Built 2018 Load: 54.4 t ADT: 56,800

US 6 EB

Good

Over: WALNUT CREEK/BIKE PATH

1.0 MI. W OF JCT. I-35/80, Polk, IA

Built 1998 Load: 67.1 t ADT: 15,350

US 6 WB

Good

Over: WALNUT CREEK/BIKE PATH

1.0 MI W OF JCT I-35/80, Polk, IA

Built 1998 Load: 67.1 t ADT: 15,350

FM SW MCKINLEY

Poor

Over: FRINK CREEK

078252500, Polk, IA

Built 1937 ADT: 245

LOCAL ROAD

Poor

Over: FOUR MILE CREEK

080233005, Polk, IA

Built 1941 ADT: 89

FM

Poor

Over: BRANCH, SKUNK RIVER

081231301, Polk, IA

Built 1968 Load: 8.1 t ADT: 139

LOCAL

Poor

Over: LITTLE BEAVER CREEK

080253504, Polk, IA

Built 1926 Load: 9.8 t ADT: 199

FM

Poor

Over: DEER CREEK

080231812, Polk, IA

Built 1950 Load: 10.1 t ADT: 2,421

LOCAL ROAD

Poor

Over: INDIAN CREEK

081220203, Polk, IA

Built 1916 Load: 10.2 t ADT: 45

LOCAL ROAD

Poor

Over: MUD CREEK

078222706, Polk, IA

Built 1913 Load: 12.6 t ADT: 79

FM

Poor

Over: CREEK

080222605, Polk, IA

Built 1951 Load: 13.3 t ADT: 229

PRIVATE (SDB)

Poor

Over: STREAM (SDB)

079222604, Polk, IA

Built 1950 Load: 14.0 t ADT: 10

LOCAL ROAD

Poor

Over: CAMP CREEK

078221403, Polk, IA

Built 1914 Load: 14.1 t ADT: 26

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.