Louisa County, IA

134 public highway bridges

Louisa County Bridge Snapshot

Louisa County, Iowa contains 134 public highway bridges in the FHWA National Bridge Inventory. Roughly 32.8% are rated “Good,” 47.8% “Fair,” 17.2% “Poor,” and 17.2% 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.

134
Total Bridges
32.8%
Good
17.2%
Poor
17.2%
Structurally Deficient

Condition Distribution

Good
32.8% (44)
Fair
47.8% (64)
Poor
17.2% (23)
SD
17.2% (23)

All Bridges (134)

HWY 99

Fair

Over: DRAINAGE DITCH

074033608, Louisa, IA

Built 1954 Load: 33.8 t ADT: 490

US 61

Fair

Over: OVERFLOW IOWA RIVER

1.1 Mi. N of SR G62, Louisa, IA

Built 1985 Load: 34.6 t ADT: 4,950

FM

Fair

Over: KEEVERS LAKE

073020803, Louisa, IA

Built 1988 Load: 34.8 t ADT: 70

LOCAL

Fair

Over: SMALL STREAM

074051402, Louisa, IA

Built 1982 Load: 35.0 t ADT: 30

LOCAL

Fair

Over: SMALL STREAM

074052501, Louisa, IA

Built 1986 Load: 35.0 t ADT: 26

LOCAL

Fair

Over: BIG SLOUGH CREEK

074050902, Louisa, IA

Built 1988 Load: 37.4 t ADT: 16

IA 92

Fair

Over: MONKEY RUN CREEK

3.0 mi. W of jct. IA 70, Louisa, IA

Built 1984 Load: 37.6 t ADT: 4,160

LOCAL

Fair

Over: SMALL STREAM

073042002, Louisa, IA

Built 1950 Load: 38.5 t ADT: 47

FM

Fair

Over: JOHNNY CREEK

074040702, Louisa, IA

Built 1970 Load: 39.6 t ADT: 50

LOCAL

Fair

Over: SMALL STREAM

076050203, Louisa, IA

Built 1989 Load: 39.9 t ADT: 51

FM

Fair

Over: SMALL STREAM

075030603, Louisa, IA

Built 1960 Load: 41.5 t ADT: 560

FM

Fair

Over: SMALL STREAM

074052308, Louisa, IA

Built 1940 Load: 46.8 t ADT: 290

LOCAL

Fair

Over: SMALL STREAM

075042203, Louisa, IA

Built 1985 Load: 47.3 t ADT: 62

IA 70

Fair

Over: SHORT CREEK

0.4 mi. N of Jct. IA 92, Louisa, IA

Built 1994 Load: 51.2 t ADT: 1,170

IA 92

Fair

Over: INDIAN CREEK

1.1 mi. W of Jct. SR X43, Louisa, IA

Built 1992 Load: 52.1 t ADT: 3,350

FM

Fair

Over: LONG CREEK

074041105, Louisa, IA

Built 1979 Load: 53.7 t ADT: 60

HWY 99

Fair

Over: DRAINAGE DITCH

073020505, Louisa, IA

Built 1954 Load: 99.9 t ADT: 490

LEVEE

Good

Over: LAKE ODESSA INLET

SEC 5 T74N R2W, Louisa, IA

Built 1996 Load: 21.8 t ADT: 100

LOCAL

Good

Over: HONEY CREEK

076053605, Louisa, IA

Built 1989 Load: 27.1 t ADT: 26

FM

Good

Over: OTTER CREEK

074033006, Louisa, IA

Built 1977 Load: 30.0 t ADT: 60

LOCAL

Good

Over: OTTER CREEK

073030401, Louisa, IA

Built 1978 Load: 30.4 t ADT: 91

LOCAL

Good

Over: SMITH CREEK

073033602, Louisa, IA

Built 1984 Load: 30.8 t ADT: 60

LOCAL

Good

Over: SMALL STREAM

073041901, Louisa, IA

Built 1986 Load: 31.8 t ADT: 30

X 99 FRANKLIN ST

Good

Over: IOWA RIVER

74032703, Louisa, IA

Built 2020 Load: 32.4 t ADT: 880

65TH ST

Good

Over: STREAM

073030503, Louisa, IA

Built 2020 Load: 32.4 t ADT: 40

X 27 S AVE

Good

Over: SMALL STREAM

073043202, Louisa, IA

Built 2020 Load: 32.4 t ADT: 30

218TH AVE

Good

Over: JOHNNY CREEK

074040404, Louisa, IA

Built 2020 Load: 32.4 t ADT: 180

W66

Good

Over: BIG SLOUGH CREEK

074050804, Louisa, IA

Built 2021 Load: 32.4 t ADT: 190

X 17

Good

Over: BUFFINGTON CREEK

074051412, Louisa, IA

Built 2014 Load: 32.4 t ADT: 290

US 61 SB IA 92 WB

Good

Over: DME RR

3.4 mi. N of W Jct. IA 92, Louisa, IA

Built 2016 Load: 32.4 t ADT: 3,350

2ND STREET

Good

Over: MONKEY CREEK

075041901, Louisa, IA

Built 1995 Load: 32.7 t ADT: 2,140

LOCAL

Good

Over: SMALL STREAM

073033205, Louisa, IA

Built 2009 Load: 32.7 t ADT: 26

FM

Good

Over: STREAM

073040702, Louisa, IA

Built 1997 Load: 32.7 t ADT: 60

FM

Good

Over: STREAM

073041804, Louisa, IA

Built 1992 Load: 32.7 t ADT: 70

LOCAL

Good

Over: SMALL STREAM

074031505, Louisa, IA

Built 2007 Load: 32.7 t ADT: 135

FM

Good

Over: SMALL STREAM

074032603, Louisa, IA

Built 1989 Load: 32.7 t ADT: 280

W AVENUE

Good

Over: BUFFINGTON CREEK

074052108, Louisa, IA

Built 2022 Load: 32.7 t ADT: 82

COUNTY LINE RD

Good

Over: SM STREAM

074053104, Louisa, IA

Built 1989 Load: 32.7 t ADT: 40

LOCAL

Good

Over: MICHAEL CREEK

075032603, Louisa, IA

Built 1976 Load: 32.7 t ADT: 166

LOCAL

Good

Over: INDIAN CREEK

075041201, Louisa, IA

Built 1987 Load: 32.7 t ADT: 41

LOCAL

Good

Over: SHORT CREEK

075050402, Louisa, IA

Built 2003 Load: 32.7 t ADT: 16

LOCAL

Good

Over: SMALL STREAM

075052104, Louisa, IA

Built 1998 Load: 32.7 t ADT: 11

X 17

Good

Over: MONKEY CREEK & IMRL RR

075052304, Louisa, IA

Built 2008 Load: 32.7 t ADT: 540

FM

Good

Over: CONE MARSH

076051403, Louisa, IA

Built 1985 Load: 32.7 t ADT: 70

FM

Good

Over: SMALL STREAM

075052504, Louisa, IA

Built 1991 Load: 32.7 t ADT: 1,470

H 16 (40TH ST)

Good

Over: SMALL STREAM

073032201, Louisa, IA

Built 2002 Load: 32.7 t ADT: 480

95TH ST

Good

Over: BURLINGTON CREEK

074052103, Louisa, IA

Built 2020 Load: 32.7 t ADT: 35

FM

Good

Over: OTTER CREEK

073031306, Louisa, IA

Built 1975 Load: 33.5 t ADT: 70

FM

Good

Over: SMALL STREAM

075043403, Louisa, IA

Built 1978 Load: 36.9 t ADT: 140

LOCAL

Good

Over: SMALL STREAM

075050104, Louisa, IA

Built 1997 Load: 37.1 t ADT: 82

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