Louisa County, IA

134 public highway bridges

Louisa County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Louisa County, Iowa contains 134 public highway bridges. Roughly 32.8% are rated “Good,” 47.8% “Fair,” and 17.2% “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.

134
Total Bridges
32.8%
Good
47.8%
Fair
17.2%
Poor Condition

Condition Distribution

Good
32.8% (44)
Fair
47.8% (64)
Poor
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 public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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.