Boone County, IA

119 public highway bridges

Boone County Bridge Snapshot

Boone County, Iowa contains 119 public highway bridges in the FHWA National Bridge Inventory. Roughly 25.2% are rated “Good,” 38.7% “Fair,” 32.8% “Poor,” and 32.8% 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.

119

Total Bridges

25.2%

Good

32.8%

Poor

32.8%

Structurally Deficient

Condition Distribution

Good

25.2% (30)

Fair

38.7% (46)

Poor

32.8% (39)

SD

32.8% (39)

All Bridges (119)

Sort:

EB IA 930

Over: US 30

At Jct. U.S. 30, Boone, IA

Built 1972 ADT: 14,000

US 169

Over: US 30

AT JUNCTION WITH US 30, Boone, IA

Built 1971 ADT: 6,600

IA 17

Over: US 30

AT JUNCTION WITH US 30, Boone, IA

Built 1968 ADT: 12,700

IA 17

Over: UP RR & 210TH ST

1.2 MI. N. OF US 30, Boone, IA

Built 2021 ADT: 4,190

FM

Over: TRIBUTARY DES MOINES RIV

085272704, Boone, IA

Built 1930 Load: 10.6 t ADT: 71

CANYON RD

Over: PEASE CREEK

IN LEDGES STATE PARK, Boone, IA

Built 1933 Load: 11.5 t

LOCAL

Over: BEAVER CREEK

084282801, Boone, IA

Built 1930 Load: 11.6 t ADT: 30

CANYON RD

Over: PEASE CREEK

IN LEDGES STATE PARK, Boone, IA

Built 1933 Load: 11.6 t

FM

Over: BEAVER CREEK

083282101, Boone, IA

Built 1926 Load: 12.4 t ADT: 20

FM

Over: BEAVER CREEK

084282101, Boone, IA

Built 1923 Load: 17.9 t ADT: 20

FM

Over: BEAVER CREEK

083282201, Boone, IA

Built 1924 Load: 18.0 t ADT: 15

IA 210

Over: TRIB OF BIG CREEK

1.4 MI. E OF E JCT. IA 17, Boone, IA

Built 1966 Load: 18.1 t ADT: 2,230

IA 144

Over: STREAM

0.4 MILES N OF JCT SR P54, Boone, IA

Built 1941 Load: 18.1 t ADT: 1,690

LOCAL

Over: IOWAY CREEK

084250101, Boone, IA

Built 1952 Load: 19.0 t ADT: 100

LOCAL

Over: TRIB DES MOINES RIVER

082263206, Boone, IA

Built 1900 Load: 19.3 t ADT: 50

LOCAL

Over: BLUFF CREEK

085271701, Boone, IA

Built 1900 Load: 19.8 t ADT: 30

US 30

Over: NOAH CREEK

AT JUNCTION WITH SR R18, Boone, IA

Built 1962 Load: 21.1 t ADT: 8,800

US 30 WB

Over: DES MOINES RIVER

1.3 MILES E OF JCT SR R18, Boone, IA

Built 1963 Load: 21.9 t ADT: 4,400

LOCAL

Over: BEAVER CREEK

084283201, Boone, IA

Built 1916 Load: 21.9 t ADT: 40

FM

Over: BLUFF CREEK

085272901, Boone, IA

Built 1900 Load: 21.9 t ADT: 60

IA 210

Over: BIG CREEK

3.3 MILES E OF JCT IA 17, Boone, IA

Built 1937 Load: 22.0 t ADT: 2,230

LOCAL

Over: TRIB DES MOINES RIVER

083261904, Boone, IA

Built 1950 Load: 22.1 t ADT: 30

FM

Over: BEAVER CREEK

082280301, Boone, IA

Built 1948 Load: 22.9 t ADT: 279

LOCAL

Over: BIG CREEK

083251901, Boone, IA

Built 1920 Load: 23.8 t ADT: 71

LOCAL

Over: TRIBUTARY PRAIRIE CREEK

084250304, Boone, IA

Built 1900 Load: 24.6 t ADT: 15

FM

Over: IOWAY CREEK

085252201, Boone, IA

Built 1963 Load: 25.8 t ADT: 1,108

FM

Over: BIG CREEK

082250903, Boone, IA

Built 1940 Load: 26.4 t ADT: 50

FM

Over: BIG CREEK

082252103, Boone, IA

Built 1965 Load: 27.3 t ADT: 71

FM

Over: DES MOINES RIVER

084271307, Boone, IA

Built 1980 Load: 27.3 t ADT: 1,028

LOCAL

Over: LITTLE BEAVER CREEK

082271802, Boone, IA

Built 1900 Load: 27.7 t ADT: 26

FM

Over: BEAVER CREEK

083281604, Boone, IA

Built 1973 Load: 29.9 t ADT: 219

LOCAL

Over: BEAVER CREEK

083281702, Boone, IA

Built 1968 Load: 29.9 t ADT: 30

FM

Over: BLUFF CREEK

085273202, Boone, IA

Built 1965 Load: 29.9 t ADT: 977

FM

Over: DES MOINES RIVER

085271403, Boone, IA

Built 1955 Load: 30.0 t ADT: 709

US 169

Over: BRANCH BEAVER CREEK

1.9 MI N OF W JCT US 30, Boone, IA

Built 1967 Load: 30.1 t ADT: 1,890

LOCAL

Over: BIG CREEK

082250401, Boone, IA

Built 1978 Load: 30.8 t ADT: 26

LOCAL

Over: BIG CREEK

083252002, Boone, IA

Built 1900 Load: 33.6 t ADT: 40

LOCAL

Over: BIG CREEK

083261201, Boone, IA

Built 1915 Load: 35.4 t ADT: 50

LOCAL

Over: BEAVER CREEK

082280903, Boone, IA

Built 1975 Load: 36.3 t ADT: 40

FM

Over: BIG CREEK

083253301, Boone, IA

Built 1992 Load: 36.3 t ADT: 977

LOCAL

Over: BEAVER CREEK

084282102, Boone, IA

Built 1900 Load: 37.9 t ADT: 5

FM

Over: WORRELL CREEK

083251302, Boone, IA

Built 1985 Load: 38.0 t ADT: 518

US 169

Over: BRANCH BEAVER CREEK

1.0 MILE N OF W JCT US 30, Boone, IA

Built 1967 Load: 38.5 t ADT: 1,890

LOCAL

Over: IOWAY CREEK

085250501, Boone, IA

Built 1988 Load: 39.6 t ADT: 20

FM

Over: BLUFF CREEK

084270801, Boone, IA

Built 1956 Load: 41.0 t ADT: 478

LOCAL

Over: MONTGOMERY CREEK

085263601, Boone, IA

Built 1994 Load: 43.7 t ADT: 30

IA 17

Over: PRAIRIE CREEK

2.4 MILES N OF JCT SR E26, Boone, IA

Built 1979 Load: 45.7 t ADT: 2,260

FM

Over: BEAVER CREEK

082283409, Boone, IA

Built 1920 Load: 48.7 t ADT: 139

FM E-41

Over: STREAM

083270604, Boone, IA

Built 1970 Load: 56.0 t ADT: 450

US 30

Over: HONEY CREEK

0.7 mi. W of Jct. SR R23, Boone, IA

Built 1962 Load: 99.9 t ADT: 8,800

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