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:

2ND AVE

Over: I-235

4.4 MILES E OF JCT IA 28, Polk, IA

Built 2003 ADT: 89,000

I-235

Over: DES MOINES RIVER AND RDS

4.6 MILES E OF JCT IA 28, Polk, IA

Built 1962 ADT: 2,531

2ND AVE EB RAMP

Over: WEST RIVER DRIVE

1.0 mile West of US 69, Polk, IA

Built 2003 ADT: 900

PENN AVE

Over: I-235

5.0 mi. E of Jct. IA 28, Polk, IA

Built 2002 ADT: 80,600

EB I-235

Over: NB US 69/E 15TH ST

AT JUNCTION WITH US 69, Polk, IA

Built 2004 ADT: 8,250

EB I-235

Over: UNIVERSITY AVE

0.6 MI E OF JCT US 69 NB, Polk, IA

Built 2005 ADT: 4,850

EB I-235

Over: E 21ST STREET

0.3 mi. E of Jct. IA #163, Polk, IA

Built 2005 ADT: 3,300

EB I-235

Over: GUTHRIE AVE

1.2 MILES E OF JCT IA 163, Polk, IA

Built 2006 ADT: 3,000

I 235 EB

Over: HULL AVE

0.4 MILE S OF JCT US 6, Polk, IA

Built 2005 ADT: 840

EB I-235

Over: NE 46 AVE

0.5 MILE S OF I-35/80 JCT, Polk, IA

Built 1967 ADT: 4,200

WB I-235

Over: NE 46TH AVE

0.5 MI S OF E JCT I-35/80, Polk, IA

Built 1967 ADT: 4,200

IA 415

Over: IA 141

AT JUNCTION WITH IA 141, Polk, IA

Built 2003 ADT: 18,500

WESTOWN PARKWAY

Over: I-80/I-35

0.2 mi. E of I-235, Polk, IA

Built 1997 ADT: 14,400

US 6

Over: I-235

At Jct. I-235, Polk, IA

Built 2003 ADT: 3,580

19TH ST RAMP

Over: KEO WAY

3.6 MILES E OF JCT IA 28, Polk, IA

Built 2004 ADT: 4,460

GRAND AVENUE

Over: MLK PKWY

078240800, Polk, IA

Built 2004 ADT: 18,400

MLK JR PKWY N

Over: RACOON RIVER, FLEUR, RR

000000000, Polk, IA

Built 2004 ADT: 1,550

MLK JR PKWY S

Over: RACOON RIVER, FLEUR, RR

078240800, Polk, IA

Built 2004 ADT: 1,550

MLK JR PKWY E/W

Over: NB FLEUR RAMP

078240800, Polk, IA

Built 2004 ADT: 3,000

NW BEAVERBROOK BLV

Over: LITTLE BEAVER CREEK TRIB

080253200, Polk, IA

Built 2018 ADT: 589

NB US 65

Over: I-80

AT WEST JUNCTION I-80, Polk, IA

Built 1992 ADT: 30,200

SB US 65

Over: I-80

AT WEST JUNCTION OF I-80, Polk, IA

Built 1992 ADT: 30,200

SB US 65

Over: US 6

1.0 MILE S OF JCT. I-80, Polk, IA

Built 1993 ADT: 3,850

NB US 65

Over: US 6

1.0 MILE S OF JCT I-80, Polk, IA

Built 1993 ADT: 3,850

SB US 65

Over: IA 163

AT JUNCTION OF IA 163, Polk, IA

Built 1993 ADT: 11,850

NB US 65

Over: IA 163

AT JUNCTION OF IOWA 163, Polk, IA

Built 1993 ADT: 11,850

WB I-235

Over: 15TH STREET

AT JUNCTION WITH US 69, Polk, IA

Built 2005 ADT: 8,250

NE 56TH ST

Over: US 65

2.1 MI. S OF JCT. I-80, Polk, IA

Built 1994 ADT: 28,500

US 65 NB

Over: NE 27TH AVE & BIKE PATH

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

Built 1994 ADT: 1,285

US 65 SB

Over: NE 27TH AVE & BIKE PATH

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

Built 1994 ADT: 1,285

US 65 NB

Over: NE 46TH AVE

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

Built 1994 ADT: 4,200

SB US 65

Over: NE 46TH AVE

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

Built 1994 ADT: 4,200

SB US 65

Over: SE 38TH ST

0.8 MILE S OF N JCT IA 5, Polk, IA

Built 1997 ADT: 105

NB US 65

Over: SE 38TH ST

0.8 MILE S OF N JCT IA 5, Polk, IA

Built 1997 ADT: 105

EB/SB IA 141

Over: IA 44

AT JUNCTION IOWA 44, Polk, IA

Built 1974 ADT: 7,000

WB/NB IA 141

Over: IA 44

AT JUNCTION IOWA 44, Polk, IA

Built 1974 ADT: 7,000

EB IA 141

Over: IA 17

AT JUNCTION IOWA 17, Polk, IA

Built 1974 ADT: 140

WB IA 141

Over: IA 17

AT JUNCTION IOWA 17, Polk, IA

Built 1974 ADT: 140

NB RAMP TO UNIV

Over: RAMP H

1.0 MILE E OF W JCT I-35, Polk, IA

Built 1984 ADT: 24,100

US 65 NB

Over: IA 5

AT N JCT. OF IA 5, Polk, IA

Built 1997 ADT: 4,200

SB US 65

Over: IA 5

AT N JCT. OF IA 5, Polk, IA

Built 1997 ADT: 2,020

NB US 65

Over: SE 64TH AVE

1.0 MILE N OF N JCT IA 5, Polk, IA

Built 1997 ADT: 2,710

SB US 65

Over: SE 64TH AVE

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

Built 1997 ADT: 2,710

US 65 NB

Over: VANDALIA ROAD & BNSF RR

2.4 MILES S OF JCT IA 163, Polk, IA

Built 1997 ADT: 1,270

US 65 SB

Over: VANDALIA ROAD & BNSF RR

2.4 MILES S OF JCT IA 163, Polk, IA

Built 1997 ADT: 1,270

NB US 65

Over: VANDALIA RD (BP)

2.1 MILES S OF JCT IA 163, Polk, IA

Built 1997 ADT: 1,530

SB US 65

Over: VANDALIA RD (BP)

2.1 MILES S OF JCT IA 163, Polk, IA

Built 1997 ADT: 1,530

US 65 NB

Over: SE 6TH AVE

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

Built 1997 ADT: 825

US 65 SB

Over: SE 6TH AVE

1.3 MILES S OF JCT IA 163, Polk, IA

Built 1997 ADT: 825

NB US 65

Over: EAST OAKWOOD DRIVE

0.4 MILE S OF JCT IA 163, Polk, IA

Built 1997 ADT: 1,010

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