Mahaska County, IA

219 public highway bridges

Mahaska County Bridge Snapshot

Mahaska County, Iowa contains 219 public highway bridges in the FHWA National Bridge Inventory. Roughly 24.7% are rated “Good,” 38.8% “Fair,” 33.3% “Poor,” and 33.3% 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.

219
Total Bridges
24.7%
Good
33.3%
Poor
33.3%
Structurally Deficient

Condition Distribution

Good
24.7% (54)
Fair
38.8% (85)
Poor
33.3% (73)
SD
33.3% (73)

All Bridges (219)

LOCAL

Poor

Over: MUCHAKINOCK CREEK

076172704, Mahaska, IA

Built 1957 Load: 7.9 t ADT: 100

LOCAL

Poor

Over: MOON CREEK

077150101, Mahaska, IA

Built 1952 Load: 8.4 t ADT: 40

FM

Poor

Over: N COAL CREEK

074170406, Mahaska, IA

Built 1953 Load: 9.1 t ADT: 20

FM

Poor

Over: BUCKLEY CREEK

077170901, Mahaska, IA

Built 1951 Load: 9.3 t ADT: 70

LOCAL

Poor

Over: COAL CREEK

074170107, Mahaska, IA

Built 1900 Load: 9.9 t ADT: 71

LOCAL

Poor

Over: CEDAR CREEK

076141203, Mahaska, IA

Built 1973 Load: 11.6 t ADT: 26

FM

Poor

Over: OLIVE BRANCH CREEK

074140103, Mahaska, IA

Built 1950 Load: 12.5 t ADT: 30

290TH ST

Poor

Over: DRAINAGE DITCH #2

074160907, Mahaska, IA

Built 1900 Load: 13.0 t ADT: 45

LOCAL

Poor

Over: PLEASANT CREEK

077143305, Mahaska, IA

Built 1956 Load: 13.6 t ADT: 15

LOCAL

Poor

Over: STREAM

077162303, Mahaska, IA

Built 1953 Load: 13.6 t ADT: 60

LOCAL

Poor

Over: PRICE CREEK

075170608, Mahaska, IA

Built 1970 Load: 13.7 t ADT: 71

LOCAL

Poor

Over: PLEASANT CREEK

076140403, Mahaska, IA

Built 1956 Load: 13.8 t ADT: 5

LOCAL

Poor

Over: DRAINAGE

076161903, Mahaska, IA

Built 1956 Load: 14.0 t ADT: 15

LOCAL

Poor

Over: DRAINAGE

077171604, Mahaska, IA

Built 1950 Load: 14.1 t ADT: 34

LOCAL

Poor

Over: DRAINAGE

076153103, Mahaska, IA

Built 1963 Load: 14.9 t ADT: 100

LOCAL

Poor

Over: DRAINAGE

076172706, Mahaska, IA

Built 1957 Load: 14.9 t ADT: 100

LOCAL

Poor

Over: MIDDLE CREEK

076150802, Mahaska, IA

Built 1963 Load: 15.2 t ADT: 40

LOCAL

Poor

Over: DRAINAGE

075142605, Mahaska, IA

Built 1951 Load: 15.7 t ADT: 45

LOCAL

Poor

Over: DRAINAGE

075162206, Mahaska, IA

Built 1973 Load: 15.7 t ADT: 80

LOCAL

Poor

Over: DRAINAGE

077140804, Mahaska, IA

Built 1957 Load: 15.7 t ADT: 20

FM

Poor

Over: OVER UP RR

076150703, Mahaska, IA

Built 1961 Load: 15.8 t ADT: 370

LOCAL

Poor

Over: N COAL CREEK

074170204, Mahaska, IA

Built 1955 Load: 15.9 t ADT: 11

LOCAL

Poor

Over: DRAINAGE

075142208, Mahaska, IA

Built 1957 Load: 15.9 t ADT: 30

LOCAL

Poor

Over: SPRING CREEK

075150807, Mahaska, IA

Built 1965 Load: 15.9 t ADT: 120

LOCAL

Poor

Over: ST JOSEPH CREEK

075172507, Mahaska, IA

Built 1959 Load: 15.9 t ADT: 71

FM

Poor

Over: BUCKLEY CREEK

077172707, Mahaska, IA

Built 1956 Load: 15.9 t ADT: 140

LOCAL

Poor

Over: TURKEY RUN

074172402, Mahaska, IA

Built 1948 Load: 16.1 t ADT: 50

FM

Poor

Over: SO SKUNK RIVER

075151108, Mahaska, IA

Built 1956 Load: 16.4 t ADT: 290

LOCAL

Poor

Over: BUCKLEY CREEK

077170503, Mahaska, IA

Built 1929 Load: 17.9 t ADT: 131

LOCAL

Poor

Over: MUCHAKINOCH CREEK

075160703, Mahaska, IA

Built 1951 Load: 18.0 t ADT: 50

LOCAL

Poor

Over: DRAINAGE

077150301, Mahaska, IA

Built 1955 Load: 18.3 t ADT: 40

LOCAL

Poor

Over: STREAM

076140602, Mahaska, IA

Built 1953 Load: 19.2 t ADT: 45

LOCAL

Poor

Over: DRAINAGE

076140301, Mahaska, IA

Built 1956 Load: 21.1 t ADT: 5

LOCAL

Poor

Over: DRAINAGE

075161707, Mahaska, IA

Built 1958 Load: 21.2 t ADT: 131

LOCAL

Poor

Over: N COAL CREEK

074171702, Mahaska, IA

Built 1956 Load: 21.4 t ADT: 71

LOCAL

Poor

Over: MUCHAKINOCK CREEK

076173518, Mahaska, IA

Built 1949 Load: 21.4 t ADT: 180

FM

Poor

Over: N SKUNK RIVER

077152210, Mahaska, IA

Built 1951 Load: 22.7 t ADT: 140

LOCAL

Poor

Over: CEDAR CREEK

077143601, Mahaska, IA

Built 1951 Load: 23.3 t ADT: 20

LOCAL

Poor

Over: OLIVE BRANCH CREEK

074140208, Mahaska, IA

Built 1956 Load: 23.8 t ADT: 80

LOCAL

Poor

Over: M BR BUCKLEY CREEK

077170301, Mahaska, IA

Built 1950 Load: 24.9 t ADT: 45

LOCAL

Poor

Over: LITTLE MUCHAKINOCK

075153104, Mahaska, IA

Built 1965 Load: 26.6 t ADT: 290

LOCAL

Poor

Over: DRAINAGE

077143204, Mahaska, IA

Built 1950 Load: 26.8 t ADT: 45

FM

Poor

Over: BUCK CREEK

077150805, Mahaska, IA

Built 1957 Load: 26.8 t ADT: 30

FM

Poor

Over: S SKUNK RIVER

076153309, Mahaska, IA

Built 1967 Load: 27.3 t ADT: 430

IA 23

Poor

Over: TRIBUTARY OF CEDAR CREEK

0.8 MI. N 0F Jct. SR T67, Mahaska, IA

Built 1928 Load: 29.5 t ADT: 2,350

LOCAL

Poor

Over: SPRING CREEK

075150404, Mahaska, IA

Built 1948 Load: 29.7 t ADT: 71

OLD IA 102

Poor

Over: BUCKLEY CREEK

077172703, Mahaska, IA

Built 1967 Load: 30.4 t ADT: 2,340

LOCAL

Poor

Over: PLEASANT CREEK

077142705, Mahaska, IA

Built 1949 Load: 35.3 t ADT: 15

LOCAL

Structurally Deficient

Over: DRAINAGE

074142701, Mahaska, IA

Built 1948 ADT: 45

LOCAL

Structurally Deficient

Over: BLUFF CREEK

074172706, Mahaska, IA

Built 1973 ADT: 11

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