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)

IA 92

Unknown

Over: MAIN ST & COLLINS RD

0.3 mi W of Jct. IA 70, Louisa, IA

Built 1995 ADT: 2,780

US 61 SB

Unknown

Over: IA 92

US 61 & IA 92 INTERCHANGE, Louisa, IA

Built 2017 ADT: 1,165

US 61 SB IA 92 WB

Unknown

Over: 170TH ST

at Jct. of SR 170 St., Louisa, IA

Built 2017 ADT: 255

FM

Fair

Over: OTTER CREEK

073030403, Louisa, IA

Built 1959 Load: 17.5 t ADT: 50

FM

Fair

Over: SMALL STREAM

074051407, Louisa, IA

Built 1960 Load: 18.1 t ADT: 50

LOCAL

Fair

Over: IOWA SLOUGH

073013206, Louisa, IA

Built 1978 Load: 20.2 t ADT: 40

LEVEE

Fair

Over: LAKE ODESSA OUTLET

SEC 36 T74N R2W, Louisa, IA

Built 1996 Load: 21.8 t ADT: 1

FM

Fair

Over: SMALL STREAM

076052803, Louisa, IA

Built 1960 Load: 22.1 t ADT: 100

FM

Fair

Over: SHORT CREEK

075050502, Louisa, IA

Built 1970 Load: 22.7 t ADT: 30

LOCAL

Fair

Over: SMALL STREAM

076051906, Louisa, IA

Built 1973 Load: 22.7 t ADT: 26

LOCAL

Fair

Over: SMALL STREAM

075043005, Louisa, IA

Built 1982 Load: 22.7 t ADT: 123

LOCAL

Fair

Over: SM STREAM

076051902, Louisa, IA

Built 1970 Load: 24.5 t ADT: 40

FM

Fair

Over: SMALL STREAM

073022905, Louisa, IA

Built 1959 Load: 25.1 t ADT: 440

FM

Fair

Over: LONG CREEK

074041804, Louisa, IA

Built 1978 Load: 25.3 t ADT: 40

LOCAL

Fair

Over: SMALL STREAM

075030204, Louisa, IA

Built 1986 Load: 26.0 t ADT: 73

LOCAL

Fair

Over: SMALL STREAM

073030804, Louisa, IA

Built 1979 Load: 26.6 t ADT: 35

FM

Fair

Over: LONG CREEK

074041604, Louisa, IA

Built 1977 Load: 27.1 t ADT: 45

FM

Fair

Over: LONG CREEK

074051204, Louisa, IA

Built 1965 Load: 29.2 t ADT: 290

LOCAL

Fair

Over: SMALL STREAM

074041605, Louisa, IA

Built 1986 Load: 29.6 t ADT: 82

FM

Fair

Over: GOOSE CREEK

076052904, Louisa, IA

Built 1982 Load: 29.8 t ADT: 25

LOCAL

Fair

Over: OTTER CREEK

073040101, Louisa, IA

Built 1972 Load: 30.0 t ADT: 35

FM

Fair

Over: TURKEY RUN

074030903, Louisa, IA

Built 1978 Load: 30.0 t ADT: 120

FM

Fair

Over: INDIAN CREEK

075033103, Louisa, IA

Built 1977 Load: 30.2 t ADT: 80

FM

Fair

Over: SMALL STREAM

073022906, Louisa, IA

Built 1966 Load: 30.4 t ADT: 110

LOCAL

Fair

Over: INDIAN CREEK

075042401, Louisa, IA

Built 1980 Load: 30.4 t ADT: 35

LOCAL

Fair

Over: MUSCATINE SLOUGH

075023104, Louisa, IA

Built 1968 Load: 30.6 t ADT: 650

LOCAL

Fair

Over: LONG CREEK

074041407, Louisa, IA

Built 1985 Load: 30.7 t ADT: 123

FM

Fair

Over: LONG CREEK

074042306, Louisa, IA

Built 1987 Load: 30.7 t ADT: 630

LOCAL

Fair

Over: SMALL STREAM

074051604, Louisa, IA

Built 1983 Load: 30.8 t ADT: 51

LOCAL

Fair

Over: MUSCATINE SLOUGH

075032405, Louisa, IA

Built 1981 Load: 30.8 t ADT: 41

LOCAL

Fair

Over: SMALL STREAM

075041501, Louisa, IA

Built 1966 Load: 30.8 t ADT: 82

LOCAL

Fair

Over: INDIAN CREEK

075042503, Louisa, IA

Built 1982 Load: 30.8 t ADT: 51

LOCAL

Fair

Over: SHORT CREEK

075050602, Louisa, IA

Built 1969 Load: 30.8 t ADT: 30

FM

Fair

Over: MUSCATINE SLOUGH

075031203, Louisa, IA

Built 1972 Load: 31.0 t ADT: 660

LOCAL

Fair

Over: SMALL STREAM

075033204, Louisa, IA

Built 1982 Load: 31.8 t ADT: 41

IA 92

Fair

Over: MONKEY RUN CREEK

0.6 mi. W of IA 70, Louisa, IA

Built 1984 Load: 31.9 t ADT: 2,790

US 61

Fair

Over: MUSKRAT LAKE

4.6 mi. S of S Jct. IA 92, Louisa, IA

Built 1985 Load: 32.3 t ADT: 4,950

X 99

Fair

Over: IOWA RIVER

073022602, Louisa, IA

Built 2014 Load: 32.4 t ADT: 570

LOCAL

Fair

Over: SMALL STREAM

073013301, Louisa, IA

Built 1998 Load: 32.7 t ADT: 15

LOCAL

Fair

Over: MICHAEL CREEK

074030112, Louisa, IA

Built 1983 Load: 32.7 t ADT: 650

LOCAL

Fair

Over: JOHNNY CREEK

074040701, Louisa, IA

Built 1989 Load: 32.7 t ADT: 82

LOCAL

Fair

Over: SMALL STREAM

074050302, Louisa, IA

Built 1983 Load: 32.7 t ADT: 82

LOCAL

Fair

Over: SMALL STREAM

074050402, Louisa, IA

Built 1991 Load: 32.7 t ADT: 30

LOCAL

Fair

Over: SMALL STREAM

075032004, Louisa, IA

Built 1994 Load: 32.7 t ADT: 21

FM

Fair

Over: SMALL STREAM

076050606, Louisa, IA

Built 1980 Load: 32.7 t ADT: 20

FM

Fair

Over: SMALL

076050803, Louisa, IA

Built 1979 Load: 32.7 t ADT: 20

60TH ST

Fair

Over: SMALL STREAM

73040701, Louisa, IA

Built 2013 Load: 32.7 t ADT: 21

LOCAL

Fair

Over: SMALL STREAM

075032903, Louisa, IA

Built 1978 Load: 33.0 t ADT: 50

CO RD H22

Fair

Over: SMALL STREAM

073022801, Louisa, IA

Built 1959 Load: 33.6 t ADT: 440

US 61

Fair

Over: MILLRACE CREEK

5.9 mi S of S Jct IA 92, Louisa, IA

Built 1985 Load: 33.7 t ADT: 4,950

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