Carroll County, IA

223 public highway bridges

Carroll County Bridge Snapshot

Carroll County, Iowa contains 223 public highway bridges in the FHWA National Bridge Inventory. Roughly 48.4% are rated “Good,” 43.5% “Fair,” 7.6% “Poor,” and 7.6% 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.

223

Total Bridges

48.4%

Good

7.6%

Poor

7.6%

Structurally Deficient

Condition Distribution

Good

48.4% (108)

Fair

43.5% (97)

Poor

7.6% (17)

SD

7.6% (17)

All Bridges (223)

Sort:

US 71

Over: UP RR & RD

0.2 mi. S of Jct. U.S. 30, Carroll, IA

Built 1988 ADT: 100

LOCAL

Over: FIELD STREAM

083363602, Carroll, IA

Built 1966 Load: 6.3 t ADT: 11

FM

Over: NORTH RACOON RIVER

085332106https://siims.io, Carroll, IA

Built 1925 Load: 10.6 t ADT: 40

LOCAL

Over: BRUSHY FORK CREEK

082342604, Carroll, IA

Built 1951 Load: 12.0 t ADT: 15

M68 DELTA AVE

Over: FIELD STREAM

082362202, Carroll, IA

Built 1952 Load: 13.2 t ADT: 100

FM

Over: FIELD STREAM

082360601, Carroll, IA

Built 1962 Load: 13.4 t ADT: 89

LOCAL

Over: FIELD STREAM

084361301, Carroll, IA

Built 1938 Load: 13.7 t ADT: 5

LOCAL

Over: ELK RUN

085341107, Carroll, IA

Built 1900 Load: 15.4 t ADT: 34

LOCAL

Over: BRUSHY FORK CREEK

082341703, Carroll, IA

Built 1971 Load: 15.5 t ADT: 15

FM

Over: FIELD STREAM

084361302, Carroll, IA

Built 1900 Load: 15.7 t ADT: 71

FM

Over: FIELD STREAM

084342302, Carroll, IA

Built 1964 Load: 15.9 t ADT: 687

LOCAL

Over: FIELD STREAM

082332302, Carroll, IA

Built 1972 Load: 16.1 t ADT: 50

FM

Over: WEST NISHNABOTNA RIVER

083363501, Carroll, IA

Built 1991 Load: 16.1 t ADT: 45

LOCAL

Over: FIELD STREAM

085351502, Carroll, IA

Built 1993 Load: 16.1 t ADT: 45

FM

Over: NORTH RACOON RIVER

085330801, Carroll, IA

Built 1940 Load: 16.2 t ADT: 71

LOCAL

Over: MIDDLE RACCOON RIVER

082331706, Carroll, IA

Built 1963 Load: 17.0 t ADT: 34

FM

Over: BRUSHY FORK CREEK

082343602, Carroll, IA

Built 1959 Load: 17.0 t ADT: 45

LOCAL

Over: FIELD STREAM

084340403, Carroll, IA

Built 1968 Load: 17.2 t ADT: 120

LOCAL

Over: WEST NISHNABOTNA RIVER

082360902, Carroll, IA

Built 1959 Load: 17.5 t ADT: 60

LOCAL

Over: WEST NISHNABOTNA RIVER

082360301, Carroll, IA

Built 1962 Load: 17.7 t ADT: 40

LOCAL

Over: WEST NISHNABOTNA RIVER

082360901, Carroll, IA

Built 1965 Load: 17.7 t ADT: 11

FM

Over: PURGATORY CREEK

084330103, Carroll, IA

Built 1961 Load: 17.7 t ADT: 34

LOCAL

Over: PURGATORY CREEK

085332501, Carroll, IA

Built 1963 Load: 17.7 t ADT: 29

LOCAL

Over: FIELD STREAM

083341002, Carroll, IA

Built 1961 Load: 17.9 t ADT: 89

LOCAL

Over: BRUSHY FORK CREEK

083352104, Carroll, IA

Built 1962 Load: 17.9 t ADT: 71

LOCAL

Over: FIELD STREAM

085363202, Carroll, IA

Built 1971 Load: 17.9 t ADT: 50

FM

Over: ELK RUN CREEK

085340302, Carroll, IA

Built 1965 Load: 18.3 t ADT: 89

FM

Over: NISHNABOTNA RIVER

082353303, Carroll, IA

Built 1900 Load: 18.8 t ADT: 45

LOCAL

Over: MIDDLE RACCOON RIVER

084343507, Carroll, IA

Built 1963 Load: 19.3 t ADT: 50

FM

Over: FIELD STREAM

084360102, Carroll, IA

Built 1936 Load: 19.3 t ADT: 40

LOCAL

Over: PURGATORY CREEK

085332503, Carroll, IA

Built 1900 Load: 19.5 t

FM

Over: PURGATORY CREEK

085331201, Carroll, IA

Built 1977 Load: 19.9 t ADT: 60

FM

Over: BEAVER CREEK

082343602, Carroll, IA

Built 1955 Load: 20.0 t ADT: 45

LOCAL

Over: FIELD STREAM

082362103, Carroll, IA

Built 1975 Load: 20.0 t ADT: 40

LOCAL

Over: WEST NISHNABOTNA RIVER

083362701, Carroll, IA

Built 1958 Load: 20.0 t ADT: 29

FM

Over: MARROWBONE CREEK

085330701, Carroll, IA

Built 1959 Load: 20.0 t ADT: 110

LOCAL

Over: ELK RUN

085341206, Carroll, IA

Built 1958 Load: 20.0 t ADT: 50

FM

Over: BEAMAN CREEK

085360602, Carroll, IA

Built 1900 Load: 20.0 t ADT: 748

FM

Over: FIELD STREAM

085363602, Carroll, IA

Built 1959 Load: 20.0 t ADT: 34

LOCAL

Over: SPRING BRANCH

083340804, Carroll, IA

Built 1966 Load: 20.2 t ADT: 71

LOCAL

Over: FIELD STREAM

083343402, Carroll, IA

Built 1967 Load: 20.2 t ADT: 29

LOCAL

Over: DOE BRANCH CREEK

084332301, Carroll, IA

Built 1965 Load: 20.2 t ADT: 71

LOCAL

Over: ELK RUN CREEK

085340502, Carroll, IA

Built 1975 Load: 20.4 t ADT: 29

LOCAL

Over: DRAINAGE DITCH #73

083340705, Carroll, IA

Built 1982 Load: 20.9 t ADT: 11

LOCAL

Over: FIELD STREAM

082340303, Carroll, IA

Built 1960 Load: 21.1 t ADT: 29

LOCAL

Over: WEST NISHNABOTNA RIVER

082363102, Carroll, IA

Built 1968 Load: 21.4 t ADT: 79

LOCAL

Over: FIELD STREAM

083361602, Carroll, IA

Built 1977 Load: 21.4 t ADT: 11

FM

Over: BRUSHY FORK CREEK

084362402, Carroll, IA

Built 1976 Load: 21.4 t ADT: 50

LOCAL

Over: FIELD STREAM

083340702, Carroll, IA

Built 1900 Load: 22.2 t ADT: 79

LOCAL

Over: SPRING BRANCH CREEK

083341504, Carroll, IA

Built 1981 Load: 22.6 t ADT: 60

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 6, 2026