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)

Sort:

LOCAL

Over: LITTLE BLUFF CREEK

074163003, Mahaska, IA

Built 1971 Load: 26.6 t ADT: 20

LOCAL

Over: MOON CREEK

077141907, Mahaska, IA

Built 1961 Load: 26.6 t ADT: 34

OLD IA 102

Over: BRANCH MIDDLE CREEK

077162001, Mahaska, IA

Built 1961 Load: 26.8 t ADT: 1,550

FM

Over: CEDAR CREEK

075173104, Mahaska, IA

Built 1971 Load: 27.3 t ADT: 150

LOCAL

Over: CEDAR CREEK

074142904, Mahaska, IA

Built 1900 Load: 28.3 t ADT: 20

US 63

Over: SOUTH SKUNK RIVER

4.2 MI. N OF JCT. IA 92, Mahaska, IA

Built 1979 Load: 28.5 t ADT: 3,250

FM

Over: MITCHELL CREEK

076160905, Mahaska, IA

Built 1972 Load: 28.6 t ADT: 290

LOCAL

Over: MUCHAKINOCK CREEK

074161305, Mahaska, IA

Built 1987 Load: 29.7 t ADT: 710

FM

Over: MIDDLE CREEK

076151606, Mahaska, IA

Built 1971 Load: 30.4 t ADT: 300

FM T-43

Over: S SKUNK RIVER

076171206, Mahaska, IA

Built 1977 Load: 30.4 t ADT: 120

LOCAL

Over: MIDDLE CREEK

077162102, Mahaska, IA

Built 1953 Load: 30.4 t ADT: 30

FM

Over: MIDDLE CREEK

077163503, Mahaska, IA

Built 1971 Load: 30.6 t ADT: 60

LOCAL

Over: STREAM

077152204, Mahaska, IA

Built 1965 Load: 31.0 t ADT: 50

LOCAL

Over: MUCHAKINOCK CREEK

074161117, Mahaska, IA

Built 1974 Load: 31.4 t ADT: 80

FM

Over: CEDAR CREEK

074151405, Mahaska, IA

Built 1957 Load: 32.3 t ADT: 120

US 63

Over: NENEBEC CREEK

0.2 mi. N of Jct. SR G71, Mahaska, IA

Built 1998 Load: 32.7 t ADT: 12,500

US 63

Over: LITTLE MUCHAKINOCK CREEK

0.2 MILES NORTH OF IA 163, Mahaska, IA

Built 1963 Load: 32.7 t ADT: 6,500

LOCAL

Over: DRAINAGE

074162403, Mahaska, IA

Built 1987 Load: 32.7 t ADT: 710

LOCAL

Over: S COAL CREEK

074171906, Mahaska, IA

Built 2005 Load: 32.7 t ADT: 60

FM

Over: TURKEY RUN

074172101, Mahaska, IA

Built 1983 Load: 32.7 t ADT: 610

FM

Over: TURKEY RUN

074172301, Mahaska, IA

Built 1994 Load: 32.7 t ADT: 610

FM

Over: SOUTH SKUNK RIVER

075141504, Mahaska, IA

Built 1982 Load: 32.7 t ADT: 330

FM

Over: SNYDER CREEK

075142206, Mahaska, IA

Built 1982 Load: 32.7 t ADT: 330

LOCAL

Over: SPRING CREEK

075152102, Mahaska, IA

Built 1986 Load: 32.7 t ADT: 840

LOCAL

Over: DRAINAGE

076143305, Mahaska, IA

Built 1988 Load: 32.7 t ADT: 50

LOCAL

Over: MIDDLE CREEK

076143408, Mahaska, IA

Built 1982 Load: 32.7 t ADT: 26

FM

Over: E BR BUCKLEY CREEK

077171006, Mahaska, IA

Built 1983 Load: 32.7 t ADT: 1,130

LOCAL

Over: DES MOINES RIVER

074162201, Mahaska, IA

Built 1987 Load: 32.7 t ADT: 710

IA 163

Over: LITTLE MUCHIKINOCK CREEK

2.4 MI. E OF JCT. IA 92, Mahaska, IA

Built 1995 Load: 32.7 t ADT: 7,800

IA 163

Over: MUCHAKINOK CREEK

1.2 MILES E OF JCT SR G5T, Mahaska, IA

Built 1997 Load: 32.7 t ADT: 12,200

FM

Over: LITTLE CREEK

077172216, Mahaska, IA

Built 1967 Load: 33.5 t ADT: 1,130

LOCAL

Over: N COAL CREEK

074170404, Mahaska, IA

Built 1950 Load: 33.7 t ADT: 60

FM

Over: DRAINAGE

077140101, Mahaska, IA

Built 1990 Load: 36.8 t ADT: 60

US 63

Over: MIDDLE CREEK

3.3 mi. S of jct. IA 146, Mahaska, IA

Built 1961 Load: 37.4 t ADT: 4,240

FM

Over: MIDDLE CREEK

076150803, Mahaska, IA

Built 1990 Load: 37.7 t ADT: 370

LOCAL

Over: BUCK CREEK

077150910, Mahaska, IA

Built 1988 Load: 38.7 t ADT: 20

FM

Over: STREAM

076150905, Mahaska, IA

Built 1962 Load: 41.5 t ADT: 370

IA 92

Over: SOUTH SKUNK RIVER

2.2 MI. W OF W JCT SR V13, Mahaska, IA

Built 1985 Load: 43.1 t ADT: 2,850

OLD IA 102

Over: MIDDLE CREEK

077162001, Mahaska, IA

Built 1962 Load: 47.9 t ADT: 1,550

FM

Over: S COAL CREEK

074172003, Mahaska, IA

Built 1994 Load: 48.2 t ADT: 610

US 63

Over: UP RR

0.1 MILES N OF JCT IA 146, Mahaska, IA

Built 1985 Load: 49.0 t ADT: 2,130

FM

Over: CEDAR CREEK

076141201, Mahaska, IA

Built 2000 Load: 53.5 t ADT: 370

LOCAL

Over: BUCK CR

077151607, Mahaska, IA

Built 1975 Load: 22.3 t ADT: 30

G77 335TH ST

Over: CEDAR CREEK

074143403, Mahaska, IA

Built 2022 Load: 32.4 t ADT: 70

ELBA AVE

Over: MUCHAKINOCK CREEK

075170102, Mahaska, IA

Built 2016 Load: 32.4 t ADT: 90

G15 110TH ST

Over: ELK CREEK

077170705, Mahaska, IA

Built 2021 Load: 32.4 t ADT: 45

N 17TH ST

Over: BRANCH OF SPRING CREEK

075150700, Mahaska, IA

Built 2020 Load: 32.4 t ADT: 120

MERINO AVE

Over: DRAINAGE

074150704, Mahaska, IA

Built 2012 Load: 32.7 t ADT: 90

LOCAL

Over: CEDAR CREEK

074151406, Mahaska, IA

Built 1985 Load: 32.7 t ADT: 30

LOCAL

Over: DRAINAGE

074151804, Mahaska, IA

Built 1998 Load: 32.7 t ADT: 80

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026