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:

US 20

Over: N BRANCH CATFISH CREEK

1.7 mi. E of Jct. IA 32, Dubuque, IA

Built 1939 Load: 99.9 t ADT: 33,600

STEIL LANE

Over: CREEK

089E11006, Dubuque, IA

Built 2016 Load: 12.0 t ADT: 5

HOLY FAMILY LANE

Over: CREEK

088E13512, Dubuque, IA

Built 2020 Load: 16.2 t ADT: 5

LOCAL

Over: BUNCOMB CREEK

087E22002, Dubuque, IA

Built 1977 Load: 17.8 t ADT: 20

LOCAL

Over: CREEK

000000000, Dubuque, IA

Built 2009 Load: 19.1 t ADT: 900

FM

Over: LITTLE MAQUOKETA RIVER

089E11107, Dubuque, IA

Built 2006 Load: 20.7 t ADT: 314

6TH ST. S.E.

Over: SMALL STREAM

6TH ST SE - SMALL STREAM, Dubuque, IA

Built 1987 Load: 21.1 t ADT: 349

MITCHELL MILL RD

Over: TETE DES MORTS RIVER

088E33204, Dubuque, IA

Built 2016 Load: 21.4 t ADT: 34

SLEEPY HOLLOW RD

Over: CREEK

090E22805, Dubuque, IA

Built 2016 Load: 21.4 t ADT: 50

FM

Over: LYTLE CREEK

087E20403, Dubuque, IA

Built 1982 Load: 22.7 t ADT: 1,270

FM

Over: CREEK

087013104, Dubuque, IA

Built 1977 Load: 22.7 t ADT: 510

FARLEY RD

Over: STREAM

000000000, Dubuque, IA

Built 2009 Load: 22.7 t ADT: 680

FM

Over: CREEK

000000000, Dubuque, IA

Built 2009 Load: 22.7 t ADT: 680

LOCAL

Over: CREEK

089E10204, Dubuque, IA

Built 1973 Load: 22.7 t ADT: 25

LOCAL

Over: CREEK

089E12905, Dubuque, IA

Built 1972 Load: 22.7 t ADT: 59

US 52

Over: LUX CREEK

6.9 MI. S Jct US 61 & 151, Dubuque, IA

Built 1986 Load: 24.3 t ADT: 3,340

MASSEY MARINA LANE

Over: SMALL CREEK

088E31404, Dubuque, IA

Built 2018 Load: 24.3 t ADT: 320

FM

Over: CREEK

000000000, Dubuque, IA

Built 2009 Load: 27.2 t ADT: 668

LOVERS LANE

Over: CREEK

090E20905, Dubuque, IA

Built 2019 Load: 28.2 t ADT: 45

LOCAL

Over: HICKORY CREEK

089021503, Dubuque, IA

Built 1984 Load: 31.8 t ADT: 59

HIDDEN VALLEY LANE

Over: STREAM

08802E2506, Dubuque, IA

Built 2021 Load: 32.1 t ADT: 128

FM

Over: CATFISH CREEK

088E22005, Dubuque, IA

Built 2017 Load: 32.4 t ADT: 737

DERBY GRANGE RD

Over: CLOIE BRANCH

089E20805, Dubuque, IA

Built 2011 Load: 32.4 t ADT: 638

N CASCADE RD

Over: SOUTH FORK CATFISH CREEK

88N02ES33NW, Dubuque, IA

Built 2012 Load: 32.4 t ADT: 2,259

SOUTH MOUND RD

Over: NO FORK MAQUOKETA RIVER

9001 28 2010, Dubuque, IA

Built 2016 Load: 32.4 t ADT: 250

BRUNSKILL RD

Over: NORTH CATFISH CREEK

W. OF SOUTH GATE DR., Dubuque, IA

Built 2013 Load: 32.4 t ADT: 865

E 16TH ST

Over: BEE BRANCH

W OF SYCAMORE ST, Dubuque, IA

Built 2011 Load: 32.4 t ADT: 4,265

US 20 EB ON RAMP

Over: S FORK CATFISH CREEK

US 20 & IA 52 SW ARTERIAL, Dubuque, IA

Built 2019 Load: 32.4 t ADT: 2,420

US 20 ON RAMP

Over: S FORK CATFISH CREEK

US 20 & IA 52 SW ARTERIAL, Dubuque, IA

Built 2018 Load: 32.4 t ADT: 1,570

US 52 NB

Over: CATFISH CREEK

US 52 NB OVER CATFISH CRK, Dubuque, IA

Built 2019 Load: 32.4 t ADT: 3,150

AIRBORNE ROAD

Over: S FORK CATFISH CREEK

0.2 MI. S. OF SEIPPEL RD., Dubuque, IA

Built 2019 Load: 32.4 t ADT: 110

US 52 SB

Over: CATFISH CREEK

US 52 SB OVER CATFISH CRK, Dubuque, IA

Built 2019 Load: 32.4 t ADT: 3,150

LOCAL

Over: WHITE WATER CREEK

087E10603, Dubuque, IA

Built 2006 Load: 32.7 t ADT: 71

FM

Over: LYTLE CREEK

087E13608, Dubuque, IA

Built 1994 Load: 32.7 t ADT: 370

TARA LANE

Over: STREAM

087011005, Dubuque, IA

Built 2021 Load: 32.7 t ADT: 20

TYLER ST NE

Over: CREEK

000000000, Dubuque, IA

Built 2005 Load: 32.7 t ADT: 509

LOCAL

Over: WHITE WATER CREEK

087013604, Dubuque, IA

Built 1999 Load: 32.7 t ADT: 71

LOCAL

Over: CREEK

087021903, Dubuque, IA

Built 2006 Load: 32.7 t ADT: 50

CHESTERMAN RD

Over: UNNAMED STREAM

088E10303, Dubuque, IA

Built 2022 Load: 32.7 t ADT: 45

FM

Over: CREEK

088E13504, Dubuque, IA

Built 1990 Load: 32.7 t ADT: 1,880

ELMWOOD DR

Over: GRANGER CREEK

00000, Dubuque, IA

Built 2009 Load: 32.7 t ADT: 770

CALONDER RD

Over: CREEK

089E10503, Dubuque, IA

Built 1995 Load: 32.7 t ADT: 157

BREHM LANE

Over: CREEK

089E11007, Dubuque, IA

Built 2018 Load: 32.7 t ADT: 11

FM

Over: LITTLE MAQUOKETA RIVER

089E11607, Dubuque, IA

Built 2005 Load: 32.7 t ADT: 530

LOCAL

Over: LITTLE MAQUOKETA RIVER

089E12005, Dubuque, IA

Built 2004 Load: 32.7 t ADT: 304

FM

Over: CREEK

089E20306, Dubuque, IA

Built 2001 Load: 32.7 t ADT: 913

FM

Over: CREEK

089010806, Dubuque, IA

Built 2002 Load: 32.7 t ADT: 884

LOCAL

Over: CREEK

090E12507, Dubuque, IA

Built 2006 Load: 32.7 t ADT: 60

PFEILER RD

Over: STREAM

9001 24 0050, Dubuque, IA

Built 2016 Load: 32.7 t ADT: 34

FM

Over: CREEK

090013204, Dubuque, IA

Built 2002 Load: 32.7 t ADT: 900

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