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)

LOCAL

Good

Over: SMALL STREAM

076053603, Louisa, IA

Built 1991 Load: 37.1 t ADT: 35

CO RD X 17

Good

Over: SHORT CREEK

075051008, Louisa, IA

Built 2011 Load: 40.2 t ADT: 540

FM

Good

Over: SMALL STREAM

073032101, Louisa, IA

Built 2002 Load: 41.0 t ADT: 480

TRI-COUNTY BR

Good

Over: IOWA RIVER

076050601, Louisa, IA

Built 1980 Load: 42.1 t ADT: 80

US 61

Good

Over: HONEY CREEK

0.1 mi. N of jct. SR H16, Louisa, IA

Built 1997 Load: 42.4 t ADT: 4,420

X AVE

Good

Over: GOOSE CREEK

076052805, Louisa, IA

Built 2021 Load: 44.7 t ADT: 62

FM

Good

Over: SMALL STREAM

074053401, Louisa, IA

Built 1950 Load: 46.3 t ADT: 690

LOCAL

Good

Over: SMALL STREAM

073042307, Louisa, IA

Built 1984 Load: 46.6 t ADT: 26

FM

Good

Over: OTTER CREEK

073040206, Louisa, IA

Built 1992 Load: 48.2 t ADT: 490

LOCAL

Good

Over: SHORT CREEK

075051305, Louisa, IA

Built 1995 Load: 50.0 t ADT: 104

FM

Good

Over: SMALL STREAM

073031502, Louisa, IA

Built 1990 Load: 52.9 t ADT: 80

LOCAL

Poor

Over: OTTER CR

073040103, Louisa, IA

Built 1921 Load: 11.4 t ADT: 16

FM

Poor

Over: OTTER CREEK

073040302, Louisa, IA

Built 1955 Load: 12.0 t ADT: 35

LOCAL

Poor

Over: OTTER CREEK

073031102, Louisa, IA

Built 1920 Load: 12.2 t ADT: 30

LOCAL

Poor

Over: STREAM

073043102, Louisa, IA

Built 1915 Load: 14.5 t ADT: 21

LOCAL

Poor

Over: SMALL STREAM

073042105, Louisa, IA

Built 1930 Load: 14.7 t ADT: 11

LOCAL

Poor

Over: SMALL STREAM

073042102, Louisa, IA

Built 1960 Load: 15.1 t ADT: 35

FM

Poor

Over: OTTER CR

073030304, Louisa, IA

Built 1959 Load: 17.5 t ADT: 80

FM

Poor

Over: SMALL STREAM

074052801, Louisa, IA

Built 1960 Load: 18.7 t ADT: 660

LOCAL

Poor

Over: STREAM

073043102, Louisa, IA

Built 1920 Load: 20.8 t ADT: 21

LOCAL

Poor

Over: SMALL STREAM

073041401, Louisa, IA

Built 1943 Load: 21.3 t ADT: 47

LOCAL

Poor

Over: SMALL STREAM

073031704, Louisa, IA

Built 1974 Load: 21.5 t ADT: 51

LOCAL

Poor

Over: SMALL STREAM

073032901, Louisa, IA

Built 1950 Load: 24.5 t ADT: 11

FM

Poor

Over: SMALL STREAM

076051101, Louisa, IA

Built 1969 Load: 25.7 t ADT: 840

FM

Poor

Over: LONG CREEK

075053202, Louisa, IA

Built 1963 Load: 25.9 t ADT: 250

FM

Poor

Over: SMALL STREAM

073030704, Louisa, IA

Built 1972 Load: 34.3 t ADT: 45

LOCAL

Poor

Over: INDIAN CREEK

075041301, Louisa, IA

Built 1969 Load: 37.7 t ADT: 62

FM

Poor

Over: STREAM

074050301, Louisa, IA

Built 1977 Load: 47.2 t ADT: 260

LOCAL

Structurally Deficient

Over: SMALL STREAM

073030702, Louisa, IA

Built 1920 ADT: 11

V AVE

Structurally Deficient

Over: BUFFINGTON CREEK

074052302, Louisa, IA

Built 1893 ADT: 11

FM

Structurally Deficient

Over: STREAM

075050802, Louisa, IA

Built 1963 ADT: 60

LOCAL

Structurally Deficient

Over: SMALL STREAM

075033104, Louisa, IA

Built 1930 Load: 13.0 t ADT: 11

LOCAL

Structurally Deficient

Over: SHORT CREEK

075050902, Louisa, IA

Built 1964 Load: 15.1 t ADT: 26

FM

Structurally Deficient

Over: SM STREAM

073041104, Louisa, IA

Built 1950 Load: 22.7 t ADT: 490

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