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)

Sort:

SB US 65

Over: EAST OAKWOOD DRIVE

0.4 MILES S OF JCT IA 163, Polk, IA

Built 1997 ADT: 1,010

S 35TH STREET

Over: IA 5

1.6 mi. E of Jct. I-35, Polk, IA

Built 2002 ADT: 30,100

IA 5 NB

Over: IA 28

At Jct. IA 28, Polk, IA

Built 2000 ADT: 8,750

IA 5 SB

Over: IA 28

At Jct. IA 28, Polk, IA

Built 2000 ADT: 7,300

I-80 EB ON RAMP

Over: NE 3RD ST

0.2 MILE E OF JCT IA 415, Polk, IA

Built 2000 ADT: 2,540

MAFFITT LAKE RD

Over: I-35

0.2 mi. S of Jct. IA 5, Polk, IA

Built 2000 ADT: 26,200

I 80 WB OFF RAMP

Over: NE 3RD ST

0.2 MILE E OF JCT IA 415, Polk, IA

Built 2000 ADT: 2,540

IA5 W TO I35 S

Over: I-35 & IA #5 RAMP C

Jct. of IA 5, Polk, IA

Built 2000 ADT: 24,400

IA 5 - RAMP C

Over: I-35

At Jct. I-35, Polk, IA

Built 2002 ADT: 24,400

SW CONNECTOR

Over: IA 5

2.3 MILES N OF JCT IA 28, Polk, IA

Built 2002 ADT: 29,600

M LUTHER KING

Over: I-235

3.2 MILES E OF JCT IA 28, Polk, IA

Built 2003 ADT: 98,500

I-235 WB

Over: EASTON BLVD

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

Built 2006 ADT: 1,680

S 42ND STREET

Over: IA 5

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

Built 2002 ADT: 32,500

22ND STREET

Over: IA 5

3.1 MILES N OF JCT IA 28, Polk, IA

Built 2002 ADT: 30,600

IA 5 SB

Over: 8TH STREET

1.6 MILES NW JUNCT IA 28, Polk, IA

Built 2002 ADT: 51

IA 5 NB

Over: 8TH STREET

1.6 MILES NW JCT IA 28, Polk, IA

Built 2002 ADT: 51

E 6TH ST

Over: I-235

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

Built 2002 ADT: 80,600

WB I-235

Over: EAST 21ST STREET

0.9 MILE E OF JCT US 69, Polk, IA

Built 2001 ADT: 3,300

5TH AVE

Over: I-235

4.2 mi. E of Jct. IA #28, Polk, IA

Built 2003 ADT: 83,600

I 235 EB OFF RAMP

Over: EAST 21ST STREET

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

Built 2006 ADT: 6,600

E 15TH RAMP D

Over: E UNIVERSITY RAMP B

0.3 MILE E OF JCT US 69, Polk, IA

Built 2004 ADT: 7,400

WB I-235

Over: IA 163/UNIV AVE/RAMP

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

Built 2004 ADT: 4,850

CORP WOODS DR

Over: I-35

1.9 mi. N of E Jct. I-80, Polk, IA

Built 2003 ADT: 73,200

UNI AVE WB ENTR

Over: WB EXIT RAMP, UNIV. AVE.

0.5 mi. E of Jct. U.S. 69, Polk, IA

Built 2004 ADT: 9,700

I 235 EB

Over: EASTON BLVD

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

Built 2004 ADT: 1,680

EB I-235 RAMP

Over: KEO WAY RAMP TO EB I-235

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

Built 2005 ADT: 11,400

I 235 WB

Over: NB I-35 & EB I-80

At East Jct. I80/I35, Polk, IA

Built 2007 ADT: 26,800

WB I-235

Over: WB I-235 & WB I-80

AT EAST JUNCTION I-35/80, Polk, IA

Built 2007 ADT: 28,500

EB I-235

Over: NB I-35 & EB I-80

AT EAST JUNCTION I-35/80, Polk, IA

Built 2007 ADT: 31,900

I 235 EB

Over: WB I-235 & WB I-80

AT EAST JUNCTION I-35/80, Polk, IA

Built 2007 ADT: 28,500

EBI235 TO WBI80

Over: EB I-80

At East Mixmaster, Polk, IA

Built 2008 ADT: 57,000

EBI80 TO NBI35

Over: WB I-80

At the N Jct. I-80/I-235, Polk, IA

Built 2009 ADT: 57,000

EBI235 TO WBI80

Over: WB I-80

East Mixmaster in DM, Polk, IA

Built 2009 ADT: 28,500

SBI35 TO EBI80

Over: WB I-80

At East Mixmaster, Polk, IA

Built 2009 ADT: 53,600

SBI35 TO EBI80

Over: NB I-35 & EB I-80

At East Mixmaster, Polk, IA

Built 2009 ADT: 53,600

WBI80 TO WBI235

Over: NB I-35 & EB I-80

At NE Mix Master in D.M., Polk, IA

Built 2009 ADT: 53,600

IA 141 FLY OVER

Over: I 35/80, IA 141 & RR

AT JCT. IA 141 & I-35/80, Polk, IA

Built 2019 ADT: 69,800

NW 100TH ST SB

Over: I 35 & I 80

1.0 MI. E OF JCT. 141, Polk, IA

Built 2016 ADT: 41,000

FM

Over: FOUR MILE CREEK

081242201, Polk, IA

Built 1965 Load: 13.5 t ADT: 912

LOCAL RD

Over: DEER CREEK

080230903, Polk, IA

Built 1976 Load: 13.6 t ADT: 60

LOCAL ROAD

Over: BR. WHITE OAK CK

081230901, Polk, IA

Built 1946 Load: 13.6 t ADT: 45

FM

Over: BR BIG CREEK

081251402, Polk, IA

Built 1931 Load: 13.6 t ADT: 259

JESTER PARK

Over: PAW CREEK

081253303, Polk, IA

Built 1963 Load: 14.4 t ADT: 29

US 69

Over: FOURMILE CREEK

0.2 MI. S OF SR F22, Polk, IA

Built 1922 Load: 15.2 t ADT: 6,800

FM

Over: DRAINAGE DITCH

080220301, Polk, IA

Built 1959 Load: 15.2 t ADT: 45

NW 146 AVE

Over: TURKEY CREEK

0.2 MI. E OF OLD IA 415, Polk, IA

Built 1937 Load: 15.3 t ADT: 71

LOCAL ROAD

Over: DRAINAGE DITCH

081221905, Polk, IA

Built 1967 Load: 15.6 t ADT: 40

US 69

Over: FOURMILE CREEK

1.3 miles N of IA 160, Polk, IA

Built 1949 Load: 16.1 t ADT: 6,800

LOCAL ROAD

Over: DITCH

081222902, Polk, IA

Built 1969 Load: 18.0 t ADT: 60

US 6

Over: DRAINAGE DITCH

0.9 MILE W OF W JCT IA 28, Polk, IA

Built 1937 Load: 18.1 t ADT: 20,100

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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Compiled by PlainBridges, Independent data publisher

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.