Johnson County, IA

317 public highway bridges

Johnson County Bridge Snapshot

Johnson County, Iowa contains 317 public highway bridges in the FHWA National Bridge Inventory. Roughly 33.4% are rated “Good,” 45.1% “Fair,” 8.2% “Poor,” and 8.2% 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.

317

Total Bridges

33.4%

Good

8.2%

Poor

8.2%

Structurally Deficient

Condition Distribution

Good

33.4% (106)

Fair

45.1% (143)

Poor

8.2% (26)

SD

8.2% (26)

All Bridges (317)

Sort:

I 380 NB

Over: CLEAR CREEK

0.5 MI. N OF JCT. 80, Johnson, IA

Built 2021 Load: 32.4 t ADT: 18,000

I 380 SB

Over: CLEAR CREEK

I-80 / I-380 INTERCHANGE, Johnson, IA

Built 2022 Load: 32.4 t ADT: 18,000

I 380 NB

Over: IAIS RR

0.7 MI. N OF JCT. I-80, Johnson, IA

Built 2021 Load: 32.4 t ADT: 26,550

I 380 SB

Over: IAIS RR

I-80 / I-380 INTERCHANGE, Johnson, IA

Built 2022 Load: 32.4 t ADT: 26,550

US218 NB TO I80 EB

Over: CLEAR CREEK

I-80/I-380/US 218 INTERCH, Johnson, IA

Built 2021 Load: 32.4 t ADT: 4,830

I380 SB TO I80 EB

Over: CLEAR CREEK

I80/I380 INTERCHANGE, Johnson, IA

Built 2022 Load: 32.4 t ADT: 14,400

560TH ST

Over: BR DEER CREEK

078083401, Johnson, IA

Built 1999 Load: 32.7 t ADT: 70

SW 360TH ST

Over: N BR OLD MANS CR

079080903, Johnson, IA

Built 1998 Load: 32.7 t ADT: 35

LOCAL

Over: SMALL STREAM

077052101, Johnson, IA

Built 1999 Load: 32.7 t ADT: 60

MORMAN TREK BLV

Over: WILLOW CREEK

079062100, Johnson, IA

Built 2005 Load: 32.7 t ADT: 5,200

OAKDALE BLVD

Over: MUDDY CREEK

080063304, Johnson, IA

Built 2009 Load: 32.7 t ADT: 4,020

SWISHERVIEW DR.

Over: SMALL STREAM

000000000, Johnson, IA

Built 1900 Load: 32.7 t ADT: 1,168

LIBERTY DRIVE

Over: SNYDER CREEK

079051900, Johnson, IA

Built 1998 Load: 32.7 t ADT: 40

MORMON TRK BLVD

Over: WILLOW CREEK

079061700, Johnson, IA

Built 2000 Load: 32.7 t ADT: 10,001

SCOTT BLVD

Over: RALSTON CREEK N. BRANCH

079060100, Johnson, IA

Built 2003 Load: 32.7 t ADT: 4,858

RIVERSIDE DR

Over: 218 RR AND RIVERSIDE DR

079062100, Johnson, IA

Built 2006 Load: 32.7 t ADT: 2,410

OAKDALE BLVD

Over: MUDDY CREEK

000000000, Johnson, IA

Built 2012 Load: 32.7 t ADT: 4,020

NORTHGATE DR

Over: TRIB. TO RAPID CREEK

080063600, Johnson, IA

Built 2003 Load: 32.7 t ADT: 66

US 218

Over: DEER CREEK

0.9 mi. S of Jct. I-80, Johnson, IA

Built 1970 Load: 32.7 t ADT: 32,400

IRELAND AVENUE

Over: CLEAR CREEK

080073304, Johnson, IA

Built 1973 Load: 33.1 t ADT: 8,339

JASPER AVE

Over: STREAM

000000000, Johnson, IA

Built 1985 Load: 33.5 t ADT: 970

CAMP CARDINAL R

Over: CLEAR CREEK

000000000, Johnson, IA

Built 1984 Load: 33.7 t ADT: 9,800

SB US 218

Over: OLD MAN CREEK

0.7 mi. S of Jct. SR F62, Johnson, IA

Built 1982 Load: 33.8 t ADT: 9,650

SW HAZLWOOD AVE

Over: OLD MANS CREEK

079073106, Johnson, IA

Built 1991 Load: 33.9 t ADT: 70

CALKINS AVE

Over: OLD MANS CREEK

079083304, Johnson, IA

Built 1999 Load: 33.9 t ADT: 30

OAKCRESTHILL RD

Over: DRAINAGE DITCH

T78N, R6W, 28, Johnson, IA

Built 2018 Load: 34.3 t ADT: 1,530

MCCOLLISTER BLV

Over: IOWA RIVER

079062201, Johnson, IA

Built 2009 Load: 34.3 t ADT: 6,000

OAKCRESTHILL RD

Over: OLD MAN CREEK

078062114, Johnson, IA

Built 2005 Load: 34.6 t ADT: 1,530

SW NAPLES AVE

Over: OLD MAN'SCREEK

078060508, Johnson, IA

Built 1985 Load: 34.6 t ADT: 150

IA 1

Over: OLD MANS CRK E OVERFLOW

0.8 MI. S, OF SR F52, Johnson, IA

Built 2020 Load: 34.7 t ADT: 4,890

IA 1

Over: OLD MANS CRK E OVRFLW

0.8 mi S of SR F52, Johnson, IA

Built 2020 Load: 34.7 t ADT: 4,890

SW MAIER AVE

Over: OLD MANS CREEK

078060604, Johnson, IA

Built 1996 Load: 35.2 t ADT: 140

FM SW 500TH ST

Over: OLD MANS CREEK

078061603, Johnson, IA

Built 1996 Load: 35.2 t ADT: 510

ROHRET RD

Over: N FORK OLD MAN CREEK

079082601, Johnson, IA

Built 1979 Load: 35.2 t ADT: 30

F20 AMANA RD

Over: BR IOWA RIVER

T81N, R08W, 19, Johnson, IA

Built 2018 Load: 35.3 t ADT: 160

FM

Over: OVER IAIS RR

079052704, Johnson, IA

Built 1993 Load: 35.6 t ADT: 820

FM 3 CO BR RD

Over: BR PRAIRIE CREEK

077053103, Johnson, IA

Built 1997 Load: 36.0 t ADT: 80

SW SIOUX AVE

Over: STREAM

078051902, Johnson, IA

Built 1966 Load: 36.0 t ADT: 50

FM UTAH AVE

Over: STREAM

078052702, Johnson, IA

Built 1998 Load: 36.0 t ADT: 2,020

NAPLES AVE SW

Over: OLD MAN'S CREEK

078060504, Johnson, IA

Built 1985 Load: 36.0 t ADT: 11

LOCAL

Over: SMALL STREAM

078060702, Johnson, IA

Built 1997 Load: 36.0 t ADT: 30

LOCAL

Over: DIRTY FACE CREEK

078071702, Johnson, IA

Built 1997 Load: 36.0 t ADT: 40

560TH ST SW

Over: STREAM

078083601, Johnson, IA

Built 1900 Load: 36.0 t ADT: 51

OSAGE RD

Over: SMALL STREAM

079052502, Johnson, IA

Built 1989 Load: 36.0 t ADT: 40

KANSAS AVE

Over: DEER CREEK

079070202, Johnson, IA

Built 1994 Load: 36.0 t ADT: 140

IRELAND AVE

Over: DEER CR

079070404, Johnson, IA

Built 2005 Load: 36.0 t ADT: 120

FM SW IVY AVE

Over: OLD WOMEN'S CR

079071602, Johnson, IA

Built 1977 Load: 36.0 t ADT: 100

FM IWV RD

Over: OLD WOMEN'S CR

079071701, Johnson, IA

Built 2006 Load: 36.0 t ADT: 1,020

FM ROHRET RD

Over: OLD WOMENS CR

079072801, Johnson, IA

Built 2004 Load: 36.0 t ADT: 60

FM SW BLK HWK D

Over: N BR OLD MAN'S CR

079080508, Johnson, IA

Built 2000 Load: 36.0 t ADT: 1,450

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