Madison County, IA

221 public highway bridges

Madison County Bridge Snapshot

Madison County, Iowa contains 221 public highway bridges in the FHWA National Bridge Inventory. Roughly 16.3% are rated “Good,” 45.7% “Fair,” 37.6% “Poor,” and 37.6% 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.

221

Total Bridges

16.3%

Good

37.6%

Poor

37.6%

Structurally Deficient

Condition Distribution

Good

16.3% (36)

Fair

45.7% (101)

Poor

37.6% (83)

SD

37.6% (83)

All Bridges (221)

Sort:

FM

Over: DRAINAGE

075282205, Madison, IA

Built 1980 Load: 59.4 t ADT: 100

US 169

Over: CARRS CREEK

2.7 mi. N of Jct. SR H17, Madison, IA

Built 1974 Load: 72.2 t ADT: 1,230

CEDAR BRIDGE RD

Over: CEDAR CREEK

076272006, Madison, IA

Built 2004 Load: 11.0 t ADT: 11

G61 MACKSBURG RD

Over: WATERWAY

074281703, Madison, IA

Built 2019 Load: 32.4 t ADT: 477

LARKSPUR AVE

Over: S FORK CLANTON CREEK

074283602, Madison, IA

Built 2016 Load: 32.4 t ADT: 50

VALLEYVIEW AVE

Over: DRAINAGE

075261004, Madison, IA

Built 2021 Load: 32.4 t ADT: 45

TIMBER RIDGE AVE

Over: BADGER CREEK

077262004, Madison, IA

Built 2015 Load: 32.4 t ADT: 50

HERITAGE AVE

Over: N BRANCH NORTH RIVER

077281704, Madison, IA

Built 2018 Load: 32.4 t ADT: 29

COTTONWOOD AVE

Over: N BR NORTH RIVER

077290402, Madison, IA

Built 2019 Load: 32.4 t ADT: 34

US 169

Over: SOUTH CLANTON CREEK

3.0 MI. S OF SR G-61, Madison, IA

Built 1974 Load: 32.7 t ADT: 1,230

LOCAL

Over: DRAINAGE

074281203, Madison, IA

Built 2007 Load: 32.7 t ADT: 11

FM

Over: DRAINAGE DITCH

074291301, Madison, IA

Built 1992 Load: 32.7 t ADT: 477

UPLAND TRAIL

Over: DRAINAGE

076260404, Madison, IA

Built 2015 Load: 32.7 t ADT: 45

LOCAL RD

Over: NORTH RIVER

076270304, Madison, IA

Built 2007 Load: 32.7 t ADT: 50

FM

Over: NORTH RIVER

077273607, Madison, IA

Built 1993 Load: 32.7 t ADT: 880

IVY AVE

Over: DRAINAGE

077280406, Madison, IA

Built 2020 Load: 32.7 t ADT: 360

HOGBACK BRIDGE RD

Over: NORTH RIVER

076281406, Madison, IA

Built 1992 Load: 32.7 t ADT: 131

LOCAL RD

Over: OVERFLOW N RIVER

076270304, Madison, IA

Built 2007 Load: 32.7 t ADT: 50

LOCAL RD

Over: NORTH RIVER

076260904, Madison, IA

Built 2008 Load: 33.9 t ADT: 45

NATURE TRAIL

Over: CEDAR CREEK

076272106, Madison, IA

Built 2006 Load: 37.2 t ADT: 60

LOCAL RD

Over: CEDAR CREEK

076272602, Madison, IA

Built 2002 Load: 37.2 t ADT: 71

LOCAL RD

Over: MIDDLE RIVER

075270804, Madison, IA

Built 1999 Load: 37.6 t ADT: 180

270TH ST

Over: DRAINAGE

752934, Madison, IA

Built 2012 Load: 37.6 t ADT: 26

HOGBACK BRIDGE RD

Over: CEDAR CREEK

076282304, Madison, IA

Built 2023 Load: 38.6 t ADT: 150

LOCAL RD

Over: MIDDLE RIVER

076293104, Madison, IA

Built 1998 Load: 38.8 t ADT: 40

LOCAL RD

Over: GRAND RIVER

074290802, Madison, IA

Built 1992 Load: 38.9 t ADT: 50

G46 WALNUT TRAIL

Over: DRAINAGE

075261203, Madison, IA

Built 2019 Load: 39.9 t ADT: 45

SETTLERS AVE

Over: STREAM

077263102, Madison, IA

Built 2022 Load: 39.9 t ADT: 60

US 169

Over: CLANTON CREEK

1.1 MI. N OF SR G61, Madison, IA

Built 1976 Load: 40.0 t ADT: 1,890

US 169

Over: CEDAR CREEK

0.9 MI. N of N JCT IA 92, Madison, IA

Built 1990 Load: 40.9 t ADT: 5,900

PAMMEL ST PARK

Over: MIDDLE RIVER

N entrance of Pammel Park, Madison, IA

Built 2003 Load: 41.6 t

LOCAL

Over: CEDAR CREEK

076282504, Madison, IA

Built 1992 Load: 45.3 t ADT: 150

P71 CLARK TOWER RD

Over: N FORK CLANTON CREEK

074111200, Madison, IA

Built 2022 Load: 45.4 t ADT: 278

LOCAL RD

Over: N FORK CLANTON CREEK

074280304, Madison, IA

Built 1993 Load: 49.8 t ADT: 50

LOCAL

Over: SOUTH RIVER

074263404, Madison, IA

Built 1999 Load: 52.7 t ADT: 34

LOCAL RD

Over: TOM CREEK

077282204, Madison, IA

Built 1994 Load: 52.7 t ADT: 50

ADAIR MADISON AVE

Over: STREAM

076290602, Madison, IA

Built 2015 Load: 52.8 t ADT: 50

VETERANS PARKWAY

Over: TRIB TO CHERRY CREEK

0.5 MI. E. of Vintage Ave, Madison, IA

Built 2018 Load: 59.9 t ADT: 11

FM

Over: MIDDLE RIVER

076262908, Madison, IA

Built 1958 ADT: 300

LOCAL

Over: DRAINAGE

074292703, Madison, IA

Built 1958 Load: 2.7 t ADT: 11

LOCAL RD

Over: DRAINAGE

075292305, Madison, IA

Built 1900 Load: 5.6 t ADT: 15

LOCAL RD

Over: MIDDLE RIVER

075281302, Madison, IA

Built 1948 Load: 8.4 t ADT: 45

LOCAL

Over: DRAINAGE

076280904, Madison, IA

Built 1939 Load: 10.7 t ADT: 34

LOCAL

Over: JIM CREEK

077291302, Madison, IA

Built 1939 Load: 11.1 t ADT: 11

FM

Over: GRAND RIVER

074292704, Madison, IA

Built 1957 Load: 11.4 t ADT: 131

LOCAL RD

Over: TOM CREEK

077292502, Madison, IA

Built 1930 Load: 12.9 t ADT: 26

FM

Over: BADGER CREEK

077271502, Madison, IA

Built 1955 Load: 13.7 t ADT: 131

FM

Over: DRAINAGE

075282203, Madison, IA

Built 1930 Load: 14.0 t ADT: 180

FM

Over: JIM CREEK

077281802, Madison, IA

Built 1948 Load: 14.1 t ADT: 668

LOCAL RD

Over: JIM CREEK

077292002, Madison, IA

Built 1961 Load: 14.4 t ADT: 34

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 5, 2026