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:

I-35 & I-80

Over: N WALNUT CREEK

1.1 MILES E OF JCT IA 141, Polk, IA

Built 1958 Load: 18.1 t ADT: 79,500

FM S.E.124TH

Over: CAMP CREEK

078222404, Polk, IA

Built 1954 Load: 18.1 t ADT: 71

LOCAL ROAD

Over: CAMP CREEK

079222305, Polk, IA

Built 1958 Load: 18.2 t ADT: 34

FM

Over: DRAINAGE

081220702, Polk, IA

Built 1967 Load: 18.2 t ADT: 439

FM

Over: BRANCH FOUR MILE CREEK

081241001, Polk, IA

Built 1975 Load: 18.7 t ADT: 259

LOCAL RD

Over: BRANCH FOUR MILE CREEK

081243504, Polk, IA

Built 1975 Load: 19.1 t ADT: 15

LOCAL ROAD

Over: OLD CHANNEL

081223201, Polk, IA

Built 1969 Load: 19.5 t ADT: 60

WESTERN HILLS D

Over: WESTERN HILLS CREEK

000000000, Polk, IA

Built 1994 Load: 20.1 t ADT: 716

LOCAL ROAD

Over: FOUR MILE CREEK

081241601, Polk, IA

Built 1926 Load: 20.5 t ADT: 26

NW MADRID DR.

Over: BIG CREEK DIV.CHL

081253504, Polk, IA

Built 1970 Load: 21.4 t ADT: 1,314

LOCAL RD

Over: BRANCH OF BIG CREEK

081250302, Polk, IA

Built 1975 Load: 21.9 t ADT: 71

AURORA AVE

Over: N WALNUT CREEK

O38090555, Polk, IA

Built 1991 Load: 21.9 t ADT: 1,821

LOCAL ROAD

Over: MUD CREEK

079221703, Polk, IA

Built 1900 Load: 22.2 t ADT: 210

US 65

Over: DRAINAGE DITCH

4.5 MILES N OF JCT SR S14, Polk, IA

Built 1978 Load: 22.9 t ADT: 9,600

FM

Over: MUCHIKINOCK CREEK

079230901, Polk, IA

Built 1969 Load: 23.0 t ADT: 2,998

NB I-35,EB I-80

Over: SAYLOR CREEK

0.5 MI. W OF JCT. 415, Polk, IA

Built 1958 Load: 23.4 t ADT: 43,750

FM

Over: FOUR MILE CREEK

080233205, Polk, IA

Built 1966 Load: 23.5 t ADT: 5,776

S 35TH ST

Over: STREAM

000000000, Polk, IA

Built 1991 Load: 24.0 t ADT: 1,252

VALLEY WEST DRIVE

Over: JORDAN CREEK

000000000, Polk, IA

Built 1984 Load: 24.6 t ADT: 11,678

FM

Over: OLD SKUNK RIV CHANNEL

081223006, Polk, IA

Built 1990 Load: 25.2 t ADT: 967

FM

Over: SPRING CREEK

078223003, Polk, IA

Built 1968 Load: 25.6 t ADT: 1,215

LOCAL ROAD

Over: CREEK

081223502, Polk, IA

Built 1900 Load: 25.9 t ADT: 40

FM

Over: TURKEY CREEK

081251101, Polk, IA

Built 1997 Load: 25.9 t ADT: 159

LOCAL

Over: MUD CREEK

079222803, Polk, IA

Built 1936 Load: 26.0 t ADT: 259

FM

Over: CAMP CREEK

079223602, Polk, IA

Built 1957 Load: 26.0 t ADT: 837

IA 316

Over: DES MOINES RIVER

3.9 MILES N OF JCT IA 5, Polk, IA

Built 1968 Load: 26.4 t ADT: 810

FM

Over: STREAM

079222408, Polk, IA

Built 1979 Load: 26.4 t ADT: 856

FM

Over: BR SKUNK RIVER

080220906, Polk, IA

Built 1927 Load: 26.4 t ADT: 89

FM

Over: SPRING CREEK

079223202, Polk, IA

Built 1990 Load: 26.8 t ADT: 3,924

LOCAL ROAD

Over: CREEK

081222001, Polk, IA

Built 1963 Load: 27.3 t ADT: 11

LOCAL

Over: FOUR MILE CREEK

081241502, Polk, IA

Built 1970 Load: 27.3 t ADT: 50

FM

Over: BEAVER CREEK

080251708, Polk, IA

Built 1972 Load: 27.7 t ADT: 1,524

EASTER LK DR

Over: BR EASTER LAKE

078233000, Polk, IA

Built 1967 Load: 28.1 t ADT: 4,097

I-235 & 17TH ST

Over: BLUE CREEK

1.1 MILES W OF JCT IA 28, Polk, IA

Built 1968 Load: 28.3 t ADT: 113,200

NB US 65

Over: SKUNK RIVER

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

Built 1972 Load: 28.4 t ADT: 4,800

FM

Over: MUD CREEK

078222705, Polk, IA

Built 1968 Load: 28.5 t ADT: 796

FM

Over: SMALL STREAM

079240351, Polk, IA

Built 1972 Load: 28.8 t ADT: 5,178

FM

Over: FOUR MILE CREEK

079230803, Polk, IA

Built 1966 Load: 29.2 t ADT: 3,715

FM

Over: INDIAN CREEK

081221202, Polk, IA

Built 1958 Load: 30.3 t ADT: 139

FM SE 6TH AV

Over: BRANCH DES MOINES RIVER

078220701, Polk, IA

Built 1972 Load: 30.8 t ADT: 678

PLUM DR

Over: NORTH WALNUT CREEK

0000000000, Polk, IA

Built 2011 Load: 31.0 t ADT: 2,628

WB I-80

Over: FOURMILE CREEK

1.4 MILE E OF E JCT I-35, Polk, IA

Built 1959 Load: 31.1 t ADT: 44,500

NB I-35,EB I-80

Over: DRAINAGE DITCH

0.8 MI. W OF JCT. IA 415, Polk, IA

Built 1958 Load: 32.1 t ADT: 48,000

PRAIRIE VIEW RD

Over: JORDON CREEK

000000000, Polk, IA

Built 1990 Load: 32.1 t ADT: 2,477

MERLE HAY RD

Over: BEAVER CREEK

000000000, Polk, IA

Built 1957 Load: 32.4 t ADT: 9,700

E HARTFORD AVE

Over: CREEK

078241300, Polk, IA

Built 1980 Load: 32.4 t ADT: 161

I-80

Over: MUD CREEK

2.3 MILES E OF JCT US 6, Polk, IA

Built 1959 Load: 32.7 t ADT: 38,700

FM

Over: DRAINAGE DITCH

078220610, Polk, IA

Built 1967 Load: 32.7 t ADT: 3,605

FM

Over: MUCHIKINOCK CREEK

079230804, Polk, IA

Built 1967 Load: 32.7 t ADT: 747

FM NE 46TH ST

Over: MUCHIKINOCK CREEK

080233402, Polk, IA

Built 1990 Load: 32.7 t ADT: 270

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