Palo Alto County, IA

114 public highway bridges

Palo Alto County Bridge Snapshot

Palo Alto County, Iowa contains 114 public highway bridges in the FHWA National Bridge Inventory. Roughly 23.7% are rated “Good,” 57% “Fair,” 19.3% “Poor,” and 19.3% 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.

114
Total Bridges
23.7%
Good
19.3%
Poor
19.3%
Structurally Deficient

Condition Distribution

Good
23.7% (27)
Fair
57% (65)
Poor
19.3% (22)
SD
19.3% (22)

All Bridges (114)

LOCAL-CLOSED!

Fair

Over: DD 81

095322104, Palo Alto, IA

Built 1882 Load: 4.9 t ADT: 46

LOCAL

Fair

Over: STREAM

096322101, Palo Alto, IA

Built 1914 Load: 8.8 t ADT: 30

LOCAL

Fair

Over: STREAM

097312901, Palo Alto, IA

Built 1928 Load: 13.9 t ADT: 36

LOCAL

Fair

Over: CYLINDER CREEK

097312702, Palo Alto, IA

Built 1972 Load: 14.6 t ADT: 15

FM

Fair

Over: DD 48

094322502, Palo Alto, IA

Built 1965 Load: 17.1 t ADT: 40

LOCAL

Fair

Over: DD 175

095331801, Palo Alto, IA

Built 1921 Load: 17.6 t ADT: 5

LOCAL

Fair

Over: STREAM

095340201, Palo Alto, IA

Built 2004 Load: 19.4 t ADT: 30

LOCAL

Fair

Over: DD 175

095330801, Palo Alto, IA

Built 1956 Load: 22.0 t ADT: 11

LOCAL

Fair

Over: OLD CHANNEL DES MOINES R

094312801, Palo Alto, IA

Built 1931 Load: 22.2 t ADT: 72

LOCAL

Fair

Over: JACK CREEK

097332205, Palo Alto, IA

Built 1973 Load: 22.4 t ADT: 73

LOCAL

Fair

Over: CYLINDER CREEK

095311003, Palo Alto, IA

Built 1962 Load: 22.7 t ADT: 72

IA 4

Fair

Over: DRAINAGE DITCH #41

5.5 mi S of jct US 18, Palo Alto, IA

Built 2000 Load: 22.9 t ADT: 2,040

LOCAL

Fair

Over: OUTLET OF RUSH LAKE

094342104, Palo Alto, IA

Built 1998 Load: 23.2 t ADT: 30

CO PARK RD

Fair

Over: STREAM

095342803, Palo Alto, IA

Built 1916 Load: 23.3 t ADT: 35

FM

Fair

Over: DD

096323602, Palo Alto, IA

Built 1978 Load: 23.3 t ADT: 40

LOCAL

Fair

Over: STREAM

094343601, Palo Alto, IA

Built 1932 Load: 23.7 t ADT: 21

FM

Fair

Over: DD #81

095322504, Palo Alto, IA

Built 1982 Load: 24.3 t ADT: 41

FM

Fair

Over: PRAIRIE CREEK

095311401, Palo Alto, IA

Built 1965 Load: 25.7 t ADT: 60

FM

Fair

Over: BR SILVER CREEK

095342401, Palo Alto, IA

Built 1963 Load: 25.7 t ADT: 538

LOCAL

Fair

Over: DD 61

094310101, Palo Alto, IA

Built 1978 Load: 26.6 t ADT: 82

FM

Fair

Over: DD #41

095332301, Palo Alto, IA

Built 1991 Load: 26.6 t ADT: 518

FM

Fair

Over: CYLINDER CREEK

096310801, Palo Alto, IA

Built 1966 Load: 26.6 t ADT: 193

FM

Fair

Over: CYLINDER CREEK

095322401, Palo Alto, IA

Built 1979 Load: 30.4 t ADT: 31

FM

Fair

Over: DD175

095330401, Palo Alto, IA

Built 1977 Load: 30.4 t ADT: 81

440TH AVE

Fair

Over: SIDE DITCH BRIDGE

2.0 mi. W of W jct. IA 4, Palo Alto, IA

Built 1965 Load: 30.6 t ADT: 10

FM

Fair

Over: CYLINDER CREEK

094310901, Palo Alto, IA

Built 1987 Load: 30.6 t ADT: 45

LOCAL

Fair

Over: DD 98

094323011, Palo Alto, IA

Built 1977 Load: 30.6 t ADT: 5

LOCAL

Fair

Over: DD NO 98

094321901, Palo Alto, IA

Built 1974 Load: 30.8 t ADT: 26

FM

Fair

Over: DD 63

094332702, Palo Alto, IA

Built 1972 Load: 30.8 t ADT: 60

LOCAL

Fair

Over: DD 63

094332802, Palo Alto, IA

Built 1977 Load: 30.8 t ADT: 11

FM

Fair

Over: CREEK

095311401, Palo Alto, IA

Built 1965 Load: 30.8 t ADT: 60

440TH AVE

Fair

Over: STREAM

096332302, Palo Alto, IA

Built 1972 Load: 30.8 t ADT: 82

FM

Fair

Over: DD

096332902, Palo Alto, IA

Built 1976 Load: 30.8 t ADT: 41

LOCAL

Fair

Over: STREAM

096333002, Palo Alto, IA

Built 1972 Load: 30.8 t ADT: 21

LOCAL

Fair

Over: CYLINDER CREEK

096310501, Palo Alto, IA

Built 1987 Load: 31.1 t ADT: 31

LOCAL

Fair

Over: DD#JT.63

094333501, Palo Alto, IA

Built 1985 Load: 31.2 t ADT: 62

LOCAL

Fair

Over: DD #61

095313501, Palo Alto, IA

Built 1980 Load: 31.2 t ADT: 41

LOCAL

Fair

Over: CYLINDER CREEK

097313201, Palo Alto, IA

Built 1974 Load: 31.4 t ADT: 35

LOCAL

Fair

Over: BEAVER CREEK DD #98

094323202, Palo Alto, IA

Built 1984 Load: 31.8 t ADT: 26

FM

Fair

Over: DD #175

095330802, Palo Alto, IA

Built 1984 Load: 31.8 t ADT: 30

LOCAL

Fair

Over: SILVER CREEK

095331802, Palo Alto, IA

Built 1981 Load: 31.8 t ADT: 30

FM

Fair

Over: DD JT 22

094341901, Palo Alto, IA

Built 1975 Load: 32.4 t ADT: 350

LOCAL

Fair

Over: STREAM

095311201, Palo Alto, IA

Built 1973 Load: 32.7 t ADT: 82

LOCAL

Fair

Over: DD #80

096323501, Palo Alto, IA

Built 1984 Load: 32.7 t ADT: 100

300TH ST

Fair

Over: CYLINDER CREEK

097312201, Palo Alto, IA

Built 2006 Load: 32.7 t ADT: 450

LOCAL

Fair

Over: DD #98

094331302, Palo Alto, IA

Built 1987 Load: 33.0 t ADT: 62

LOCAL

Fair

Over: DD#63

094331901, Palo Alto, IA

Built 1984 Load: 33.0 t ADT: 26

FM

Fair

Over: DD JT 22

094342001, Palo Alto, IA

Built 1975 Load: 33.0 t ADT: 350

LOCAL

Fair

Over: DRAINAGE DDJT22

094342004, Palo Alto, IA

Built 1975 Load: 33.0 t ADT: 30

FM

Fair

Over: DD 80

095310601, Palo Alto, IA

Built 1975 Load: 33.0 t ADT: 133

Read our methodology — how this data is sourced, computed, and verified.

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial