Johnson County, IA

317 public highway bridges

Johnson County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Johnson County, Iowa contains 317 public highway bridges. Roughly 33.4% are rated “Good,” 45.1% “Fair,” and 8.2% “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.

317

Total Bridges

33.4%

Good

45.1%

Fair

8.2%

Poor Condition

Condition Distribution

Good

33.4% (106)

Fair

45.1% (143)

Poor

8.2% (26)

All Bridges (317)

Sort:

480TH ST

Over: SMALL

078061201, Johnson, IA

Built 1978 Load: 36.0 t ADT: 81

SW 480TH ST

Over: STREAM

078070803, Johnson, IA

Built 1970 Load: 36.0 t ADT: 20

SW KANSAS AVE

Over: STREAM

078072302, Johnson, IA

Built 1993 Load: 36.0 t ADT: 40

SW 540TH ST

Over: STREAM

078072501, Johnson, IA

Built 1972 Load: 36.0 t ADT: 45

SW 520TH ST

Over: BR DEER CREEK

078082101, Johnson, IA

Built 1991 Load: 36.0 t ADT: 5

FM SAND RD

Over: STREAM

079063502, Johnson, IA

Built 1976 Load: 36.0 t ADT: 3,330

FM IVY AVE

Over: DEER CREEK

079070402, Johnson, IA

Built 1994 Load: 36.0 t ADT: 790

FM ROHRET RD

Over: DRAINAGE

079072303, Johnson, IA

Built 1900 Load: 36.0 t ADT: 270

FM SW BLK HWK D

Over: N BR OLD MAN'S CR

079080508, Johnson, IA

Built 2000 Load: 36.0 t ADT: 1,450

SW EAGLE AVE

Over: STREAM

079081504, Johnson, IA

Built 1900 Load: 36.0 t ADT: 35

280TH ST NE

Over: NICHOLSON CREEK

080052401, Johnson, IA

Built 1982 Load: 36.0 t ADT: 122

FM SO FRONT ST

Over: MUDDY CREEK

000000000, Johnson, IA

Built 2002 Load: 36.0 t ADT: 7,700

FM PRARE DU CHN

Over: BR RAPID CREEK

080062604, Johnson, IA

Built 1993 Load: 36.0 t ADT: 980

NEWPORT RD

Over: BR TURKEY CR

080062608, Johnson, IA

Built 1976 Load: 36.0 t ADT: 760

FM 250TH ST

Over: BR BUFFALO CK

080070903, Johnson, IA

Built 1978 Load: 36.0 t ADT: 920

FM JAMES AVE

Over: BUFFALO CREEK

000000000, Johnson, IA

Built 1960 Load: 36.0 t ADT: 1,990

FM 250TH ST

Over: DRAINAGE DITCH

080080903, Johnson, IA

Built 1978 Load: 36.0 t ADT: 620

SUTLIFF RD

Over: STREAM

081051903, Johnson, IA

Built 1900 Load: 36.0 t ADT: 340

SEVEN SIS RD

Over: LINGLE CREEK

081060305, Johnson, IA

Built 1979 Load: 36.0 t ADT: 35

NE HICKORY H RD

Over: W HOOSIER CR

081071303, Johnson, IA

Built 1977 Load: 36.0 t ADT: 300

LINN-JOHNSON RD

Over: STREAM

081080501, Johnson, IA

Built 1974 Load: 36.0 t ADT: 60

FM 120TH ST

Over: BR PLUM CR

081081201, Johnson, IA

Built 1989 Load: 36.0 t ADT: 1,630

LOCAL

Over: HOCKEYS SLOUGH

077051202, Johnson, IA

Built 2001 Load: 36.0 t ADT: 40

LINN-JOHNSON RD

Over: STREAM

081080401, Johnson, IA

Built 1975 Load: 36.1 t ADT: 102

FM SW 540TH AVE

Over: DEER CREEK

078082903, Johnson, IA

Built 1976 Load: 36.2 t ADT: 900

SW BUCHANAN AVE

Over: DRAINAGE

078082004, Johnson, IA

Built 1974 Load: 37.4 t ADT: 15

FM ELY RD

Over: LINGLE CREEK

081060904, Johnson, IA

Built 1955 Load: 37.9 t ADT: 3,930

FM AM LEGION RD

Over: SNYDER CREEK

079051703, Johnson, IA

Built 1978 Load: 39.0 t ADT: 1,480

COSGROVE RD

Over: OLD MANS CREEK

078080210, Johnson, IA

Built 2012 Load: 39.3 t ADT: 61

LINN-JOHNSON RD

Over: CHERRY CREEK

081080101, Johnson, IA

Built 2001 Load: 39.3 t ADT: 80

SW BLK DIAMOND

Over: OLD WOMAN'S CREEK

079072705, Johnson, IA

Built 2006 Load: 43.4 t ADT: 650

FM

Over: MILLER CREEK

078081902, Johnson, IA

Built 2001 Load: 45.7 t ADT: 600

SB US 218

Over: CROOKED CREEK

2.4 mi. N of Jct. IA 22, Johnson, IA

Built 1982 Load: 52.2 t ADT: 9,650

NAPOLEON ST

Over: SNYDER CREEK

078060101, Johnson, IA

Built 1987 Load: 57.8 t ADT: 381

DUBUQUE ST

Over: IOWA RIVER

080063318, Johnson, IA

Built 1991 Load: 76.1 t ADT: 6,900

1ST AVE

Over: RALSTON CREEK S. BRANCH

079061300, Johnson, IA

Built 1997 Load: 20.1 t ADT: 14,992

OAKDALE BLVD

Over: MUDDY CREEK

000000000, Johnson, IA

Built 1996 Load: 24.5 t ADT: 5,803

FM SAND RD

Over: STREAM

078060204, Johnson, IA

Built 2005 Load: 25.1 t ADT: 2,620

FM SW BLK DIMND

Over: OLD MAN'S CREEK

000000000, Johnson, IA

Built 2009 Load: 25.6 t ADT: 670

NW BAXTER AVE

Over: KNAPP CREEK

081080604, Johnson, IA

Built 1995 Load: 30.7 t ADT: 15

EAGLE AVE

Over: CLEAR CREEK

080082308, Johnson, IA

Built 1993 Load: 32.2 t ADT: 15

SW NAPLES AVE

Over: BR OLD MAN CR

078060802, Johnson, IA

Built 1997 Load: 32.3 t ADT: 102

SW EAGLE AVENUE

Over: F OLD MANS CREEK

079081004, Johnson, IA

Built 2002 Load: 32.3 t ADT: 51

1ST AVENUE

Over: MUDDY CREEK

080063204, Johnson, IA

Built 1988 Load: 32.3 t ADT: 6,625

IA 1 NB

Over: RALSTON CREEK

2.3 MI. S. OF I-80, Johnson, IA

Built 2019 Load: 32.4 t ADT: 2,850

I 80 EB

Over: CLEAR CREEK

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

Built 2023 Load: 32.4 t ADT: 13,450

I 80 WB

Over: CLEAR CREEK

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

Built 2022 Load: 32.4 t ADT: 13,450

F46 IWV RD

Over: OLD WOMANS CR

079081401, Johnson, IA

Built 2005 Load: 32.4 t ADT: 480

PRENTISS ST

Over: RALSTON CREEK

079061500, Johnson, IA

Built 2020 Load: 32.4 t ADT: 1,664

I80 WB TO I380 NB

Over: CLEAR CREEK

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

Built 2021 Load: 32.4 t ADT: 13,800

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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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.