Dubuque County, IA

304 public highway bridges

Dubuque County Bridge Snapshot

Dubuque County, Iowa contains 304 public highway bridges in the FHWA National Bridge Inventory. Roughly 41.4% are rated “Good,” 35.5% “Fair,” 8.9% “Poor,” and 8.9% 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.

304

Total Bridges

41.4%

Good

8.9%

Poor

8.9%

Structurally Deficient

Condition Distribution

Good

41.4% (126)

Fair

35.5% (108)

Poor

8.9% (27)

SD

8.9% (27)

All Bridges (304)

Sort:

N CASCADE RD

Over: US 52

2.7 mi. W of jct. US 20, Dubuque, IA

Built 2011 ADT: 6,100

NB US 61/151

Over: 4TH, 5TH, WHITE ST

0.6 mi. N of US 20, Dubuque, IA

Built 1992 ADT: 440

US 61/151 SB

Over: 4TH, 5TH, WHITE ST

0.6 mi. N of US 20, Dubuque, IA

Built 1992 ADT: 2,120

NB US 61/151

Over: EAST 9TH ST & CN RR

Over E 9th street, Dubuque, IA

Built 1992 ADT: 1,890

SB US 61/151

Over: EAST 9TH ST & CN RR

Over E 9th street, Dubuque, IA

Built 1992 ADT: 1,890

NB US 61/151

Over: 7TH ST

0.3 M. S OF JCT. IA. 3, Dubuque, IA

Built 1992 ADT: 100

NB US 61

Over: 11TH ST

1.0 Mi. N of Jct. US 20, Dubuque, IA

Built 1992 ADT: 510

SB US 61/151

Over: 7TH ST

0.3 M. S OF JCT. IA. 3, Dubuque, IA

Built 1992 ADT: 100

SB US 61

Over: 11TH ST

1.0 Mi. N. of Jct. US 20., Dubuque, IA

Built 1992 ADT: 510

US 61 & 151

Over: MISSISSIPPI RIVER ISLAND

IN NORTH DUBUQUE, Dubuque, IA

Built 1982 ADT: 1,900

EB US 20

Over: US 52 SB

AT JCT. IA 136, Dubuque, IA

Built 1987 ADT: 3,500

WB US 20

Over: US 52 SB

AT JCT. IA 136, Dubuque, IA

Built 1987 ADT: 3,500

Y21 SUNDOWN RD

Over: US 20 US 52

AT JCT SR- Y21, Dubuque, IA

Built 1987 ADT: 12,600

7TH ST-Y 13

Over: US 20 & 52

0.5 MI. W OF JCT. SR Y13, Dubuque, IA

Built 1989 ADT: 11,500

US 20 EB US 52 SB

Over: 1ST ST S

AT JCT. S.R. Y13, Dubuque, IA

Built 1988 ADT: 1,660

US 20 WB US 52 NB

Over: 1ST ST S

AT JCT. SR Y13, Dubuque, IA

Built 1988 ADT: 1,660

BOBCAT RD

Over: US 20 & 52

0.5 mi. W of Jct. SR Y17, Dubuque, IA

Built 1988 ADT: 13,800

US 20 EB US 52 SB

Over: Y 17 (EPWORTH)

At Jct. of SR Y17, Dubuque, IA

Built 1988 ADT: 1,050

US 20 WB US 52 NB

Over: Y 17 (EPWORTH)

AT JCT. of SR Y17, Dubuque, IA

Built 1988 ADT: 1,050

NB US 61 & 151

Over: IA 946 & CITY STS & RR

0.3 MI. S OF JCT. U.S. 20, Dubuque, IA

Built 1990 ADT: 3,400

SB US 61 & 151

Over: IA 946 & CITY STS & RR

0.3 MI. S OF JCT. U.S. 20, Dubuque, IA

Built 1990 ADT: 3,400

IA 946 NB

Over: VALLEY ST

0.5 MI. S. OF JCT. US 20, Dubuque, IA

Built 1990 ADT: 427

IA 946 SB

Over: VALLEY ST

0.5 mi. S of jct. US 20, Dubuque, IA

Built 1990 ADT: 427

3RD ST

Over: US 61 & 151

0.4 MI. N. OF JCT. US 20, Dubuque, IA

Built 1991 ADT: 26,300

US 61 & 151

Over: PEOSTA CHL & CITY ST

0.2 mi. N. of E 11th St., Dubuque, IA

Built 1991 ADT: 2,510

FREMONT AVE

Over: US 20

1.3 MI W OF JCT US 61&151, Dubuque, IA

Built 1996 ADT: 25,200

GRANDVIEW AVE

Over: US 20

1.2 MI. W OF JCT 61 & 151, Dubuque, IA

Built 1996 ADT: 25,200

HILL-BRYANT ST

Over: US 20

0.6 MI. W OF US 61 & 151, Dubuque, IA

Built 1996 ADT: 29,100

NW ARTERIAL NB

Over: WEST 32ND STREET

1.9 mi. S of Jct. IA 3, Dubuque, IA

Built 2002 ADT: 76

NW ARTERIAL SB

Over: WEST 32ND STREET

1.9 mi. S of Jct. IA 3, Dubuque, IA

Built 2002 ADT: 76

US 151 SB

Over: IA 136

At jct. of IA 136, Dubuque, IA

Built 2002 ADT: 1,125

US 151 (NB/EB)

Over: IA 136

At Jct. IA 136, Dubuque, IA

Built 2002 ADT: 1,125

US 151 NB

Over: AITCHISON ROAD

0.5 MI. E OF JCT. IA 136, Dubuque, IA

Built 2002 ADT: 255

US 151 SB

Over: AITCHISON ROAD

0.5 mi. N of Jct. IA 136, Dubuque, IA

Built 2002 ADT: 255

US 151 SB

Over: IND PARK ROAD

1.6 mi. N of Jct. IA 136, Dubuque, IA

Built 2002 ADT: 1,890

US 151 NB

Over: IND PARK ROAD

1.6 mi. N of Jct. IA 136, Dubuque, IA

Built 2002 ADT: 1,890

US 61 & 151 NB

Over: CATFISH CR, RR & RD

0.7 MI S of Grandview Av, Dubuque, IA

Built 2014 ADT: 77

SWISS VALLEY ROAD

Over: US 20

2.8 Mi S of Jct. US 52, Dubuque, IA

Built 2021 ADT: 19,000

ENGLISH MILL RD

Over: US 52

0.7 MI. E. OF US 20, Dubuque, IA

Built 2017 ADT: 6,300

MILITARY RD

Over: US 52

MILITARY RD INTERSECTION, Dubuque, IA

Built 2017 ADT: 6,300

US 52

Over: US 20

IA 32 OVER US20 IN DUBUQU, Dubuque, IA

Built 2019 ADT: 6,000

US 52

Over: US 61/151 GRANGER CREEK

US 61/151 & IA 32 INTRCHG, Dubuque, IA

Built 2019 ADT: 9,400

N CASCADE CONNECTR

Over: US 52

N CASCADE CONNECTR, Dubuque, IA

Built 2018 ADT: 5,700

HOSCH RD

Over: CREEK

090023004, Dubuque, IA

Built 1926 Load: 12.0 t ADT: 34

KLAREN RD

Over: CREEK

087021601, Dubuque, IA

Built 1941 Load: 13.3 t ADT: 5

LOCAL

Over: SMALL STREAM

090020902, Dubuque, IA

Built 1986 Load: 16.5 t ADT: 34

LOCAL

Over: CREEK

089022401, Dubuque, IA

Built 1900 Load: 16.8 t ADT: 70

LOCAL

Over: CREEK

087E12804, Dubuque, IA

Built 1946 Load: 17.0 t ADT: 26

LOCAL

Over: SM CREEK

088022302, Dubuque, IA

Built 1950 Load: 17.0 t ADT: 50

FM

Over: SMALL STREAM

000000000, Dubuque, IA

Built 1950 Load: 17.0 t ADT: 769

Read our methodology — how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →

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