Polk County, IA

415 public highway bridges

Polk County Bridge Snapshot

Polk County, Iowa contains 415 public highway bridges in the FHWA National Bridge Inventory. Roughly 35.4% are rated “Good,” 25.3% “Fair,” 6% “Poor,” and 6% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in IA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

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

415

Total Bridges

35.4%

Good

6%

Poor

6%

Structurally Deficient

Condition Distribution

Good

35.4% (147)

Fair

25.3% (105)

Poor

6% (25)

SD

6% (25)

All Bridges (415)

Sort:

N PARK ST

Over: LITTLE BEAVER CREEK

080252900, Polk, IA

Built 2007 Load: 32.7 t ADT: 288

SE 9TH ST

Over: CRAWFORD CREEK

078241000, Polk, IA

Built 2010 Load: 32.7 t ADT: 465

E OVID AVENUE

Over: 7TH WARD DITCH

079233000, Polk, IA

Built 1996 Load: 32.7 t ADT: 1,823

SW MAGAZINE RD

Over: SAYLOR CREEK

080242701, Polk, IA

Built 2008 Load: 32.7 t ADT: 89

SW PRAIRIE TRL

Over: SAYLOR CREEK

080242600, Polk, IA

Built 2013 Load: 32.7 t ADT: 344

N MAIN ST

Over: CREEK

080253200, Polk, IA

Built 2002 Load: 32.7 t ADT: 143

64TH ST

Over: DRAINAGE

T78N, R26W, S13, DAL CO, Polk, IA

Built 2009 Load: 32.7 t ADT: 43

IA 5 RAMP C NB

Over: DRAINAGE

1.0 MILE S OF I-35 JUNCT, Polk, IA

Built 2000 Load: 32.7 t ADT: 1,220

I 35 NB

Over: OVER UP RR

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

Built 2002 Load: 32.7 t ADT: 45,700

E UNIVERSITY

Over: SMALL CREEK

078230600, Polk, IA

Built 2003 Load: 32.7 t ADT: 27,200

CHAYSE ST SW

Over: DITCH NUMBER 2

080233600, Polk, IA

Built 2021 Load: 33.0 t ADT: 14

SB US 65

Over: OVER UP RR

1.9 MILES N OF N JCT IA 5, Polk, IA

Built 1997 Load: 33.1 t ADT: 12,450

60TH ST

Over: JORDON CREEK

P60800590, Polk, IA

Built 1992 Load: 33.3 t ADT: 13,750

IA 415

Over: DRAINAGE DITCH

0.5 MI. S OF JCT. IA 160, Polk, IA

Built 1983 Load: 33.7 t ADT: 27,000

NE 3RD ST

Over: CREEK

0.13 Mi. N. of NE 6 Ave., Polk, IA

Built 2020 Load: 34.0 t ADT: 2,521

NE 118TH AVE

Over: BRANCH SKUNK RIVER

080220301, Polk, IA

Built 2000 Load: 34.0 t ADT: 45

NW 134TH AVE

Over: FOUR MILE CREEK

0.2 mi E of NW 2nd St, Polk, IA

Built 2021 Load: 34.0 t ADT: 180

142ND ST

Over: WALNUT CREEK

O57000543, Polk, IA

Built 2006 Load: 34.0 t ADT: 3,538

NE 102ND AVE

Over: DRAINAGE DITCH NO 38

080221401, Polk, IA

Built 2016 Load: 34.3 t ADT: 459

NE SANTIAGO DR

Over: CREEK

080222111, Polk, IA

Built 2017 Load: 34.3 t ADT: 300

LOCAL RD

Over: FOUR MILE CREEK

080231800, Polk, IA

Built 1991 Load: 34.3 t ADT: 7,530

NORTH JAMES ST

Over: LITTLE BEAVER CREEK

080252902, Polk, IA

Built 2017 Load: 34.3 t ADT: 1,534

LOCAL

Over: BR OF CAMP CREEK

079221003, Polk, IA

Built 1993 Load: 34.4 t ADT: 468

FM NE 118TH

Over: SKUNK RIVER

080220505, Polk, IA

Built 1992 Load: 34.6 t ADT: 45

F34 NE 94TH AVE

Over: DD #38

Polk County, Polk, IA

Built 2019 Load: 34.7 t ADT: 417

S14 NE YODER DR

Over: DRAINAGE DITCH

.1 Mi. N. of NE 126th St, Polk, IA

Built 2020 Load: 34.7 t ADT: 967

NW 62ND AVE WB

Over: BEAVER CREEK

000000000, Polk, IA

Built 2012 Load: 34.9 t ADT: 1,941

FM

Over: MUD CREEK

078222201, Polk, IA

Built 1990 Load: 35.6 t ADT: 358

FM

Over: SAYLOR CREEK

079240338, Polk, IA

Built 2003 Load: 35.6 t ADT: 3,835

FM

Over: DRAINAGE DITCH

079240421, Polk, IA

Built 2005 Load: 35.7 t ADT: 3,755

FM

Over: CREEK

079241501, Polk, IA

Built 2003 Load: 35.9 t ADT: 956

NE 47TH STREET

Over: FOUR MILE CREEK

080240100, Polk, IA

Built 2006 Load: 35.9 t ADT: 89

I 35

Over: OTTER CREEK

1.8 MI. S OF NE 126TH AVE, Polk, IA

Built 2012 Load: 36.0 t ADT: 47,500

SE 20TH AVE

Over: BRANCH MUD CREEK

078221603, Polk, IA

Built 2013 Load: 36.0 t ADT: 60

NE 24TH COURT

Over: FOUR MILE CREEK

NE 24th Ct over 4 Mile Cr, Polk, IA

Built 2017 Load: 36.0 t ADT: 150

NE 54TH AVE

Over: MUD CREEK

079221701, Polk, IA

Built 2011 Load: 36.2 t ADT: 548

NW 100TH STREET

Over: LITTLE BEAVER CREEK

0.1 MI. S. OF NW 82ND AVE, Polk, IA

Built 2017 Load: 36.6 t ADT: 230

I 80 WB OFF RAMP

Over: DRAINAGE

0.2 MILES E OF US 69, Polk, IA

Built 1999 Load: 36.6 t ADT: 4,080

LOCAL ROAD

Over: BRANCH FOUR MILE CREEK

081240402, Polk, IA

Built 1999 Load: 36.9 t ADT: 60

LOCAL

Over: SMALL STREAM

081241402, Polk, IA

Built 1995 Load: 36.9 t ADT: 45

FM

Over: MUD CREEK

078220903, Polk, IA

Built 1990 Load: 37.2 t ADT: 159

FM 158TH

Over: LITTLE CREEK

081250801, Polk, IA

Built 1990 Load: 37.2 t ADT: 170

SB US 65

Over: OVER 4 MI. CK & IAIS RR

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

Built 1994 Load: 37.5 t ADT: 14,300

2ND AVE

Over: BIRDLAND DR

079243502, Polk, IA

Built 2023 Load: 37.6 t ADT: 17,517

NB US 65

Over: OVER UP RR

1.9 MI. N OF N JCT. IA 5, Polk, IA

Built 1997 Load: 37.6 t ADT: 12,450

FM

Over: MUD CREEK

079222901, Polk, IA

Built 1986 Load: 38.4 t ADT: 278

W 1ST STREET

Over: ROCK CREEK

080242105, Polk, IA

Built 2007 Load: 38.8 t ADT: 4,709

I-80 EB RAMP D

Over: DRAINAGE

0.2 MILE EAST OF US 69, Polk, IA

Built 1999 Load: 38.9 t ADT: 2,300

NW 13TH ST

Over: ROCK CREEK

080241601, Polk, IA

Built 2016 Load: 40.2 t ADT: 95

GRAND AVE

Over: JORDAN CREEK

City of West Des Moines, Polk, IA

Built 2015 Load: 40.2 t ADT: 3,865

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

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026