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)

US 169

Good

Over: STREAM

4.7 MI. S OF S JCT. US 30, Boone, IA

Built 1935 Load: 18.1 t ADT: 3,370

IA 210

Good

Over: STREAM

IN MADRID, Boone, IA

Built 1989 Load: 20.0 t ADT: 2,880

190TH ST

Good

Over: TRIB OF BEAVER CREEK

084282201, Boone, IA

Built 2016 Load: 25.3 t ADT: 34

R AVE

Good

Over: PRAIRIE CREEK

085263602, Boone, IA

Built 2017 Load: 25.3 t ADT: 20

US 169

Good

Over: MIDDLE BEAVER CREEK

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

Built 1932 Load: 29.8 t ADT: 1,890

MONTONA RD

Good

Over: HONEY CREEK

083260714, Boone, IA

Built 2017 Load: 32.4 t ADT: 110

140TH ST

Good

Over: IOWAY CREEK

085252701, Boone, IA

Built 2016 Load: 32.4 t ADT: 30

U AVE

Good

Over: MONTGOMERY CREEK

085253302, Boone, IA

Built 2019 Load: 32.4 t ADT: 30

A AVE

Good

Over: STREAM

084280702, Boone, IA

Built 2019 Load: 32.7 t ADT: 5

LOCAL

Good

Over: IOWAY CREEK

085251603, Boone, IA

Built 2006 Load: 33.7 t ADT: 26

E26 170TH ST

Good

Over: BEAVER CREEK

084280901, Boone, IA

Built 2016 Load: 34.3 t ADT: 359

FM

Good

Over: BLUFF CREEK

085272902, Boone, IA

Built 1987 Load: 36.3 t ADT: 977

LOCAL

Good

Over: BEAVER CREEK

083282801, Boone, IA

Built 1999 Load: 39.0 t ADT: 15

335TH ST

Good

Over: LITTLE BEAVER CREEK

082273305, Boone, IA

Built 2011 Load: 40.2 t ADT: 40

W AVE

Good

Over: MONTGOMERY CREEK

085253502, Boone, IA

Built 2015 Load: 40.2 t ADT: 30

FM

Good

Over: BEAVER CREEK

083282101, Boone, IA

Built 2010 Load: 41.5 t ADT: 20

LOCAL

Good

Over: BEAVER CREEK

082282706, Boone, IA

Built 1996 Load: 42.3 t ADT: 60

LOWER LEDGES RD

Good

Over: PEASE CREEK

IN LEDGES STATE PARK, Boone, IA

Built 2011 Load: 42.3 t

LOCAL

Good

Over: BEAVER CREEK

082281505, Boone, IA

Built 1997 Load: 42.5 t ADT: 34

FM

Good

Over: IOWAY CREEK

084251201, Boone, IA

Built 2002 Load: 42.5 t ADT: 170

180TH ST

Good

Over: BEAVER CREEK

084281601, Boone, IA

Built 2020 Load: 42.8 t ADT: 71

240TH ST

Good

Over: MIDDLE BEAVER CREEK

083281601, Boone, IA

Built 2021 Load: 48.0 t ADT: 26

FM

Good

Over: ELKHORN CREEK

085273603, Boone, IA

Built 1997 Load: 48.0 t ADT: 71

LOCAL

Good

Over: BIG CREEK

082251603, Boone, IA

Built 2004 Load: 48.2 t ADT: 30

LOCAL

Good

Over: EVERSOLL CREEK

082262101, Boone, IA

Built 2009 Load: 48.2 t ADT: 30

LOCAL

Good

Over: LITTLE BEAVER CREEK

082272901, Boone, IA

Built 2004 Load: 48.2 t ADT: 45

FM

Good

Over: LITTLE BEAVER CREEK

082273201, Boone, IA

Built 2003 Load: 48.2 t ADT: 40

LOCAL

Good

Over: BEAVER CREEK

083280701, Boone, IA

Built 2007 Load: 52.9 t ADT: 15

LOCAL

Good

Over: BEAVER CREEK

083281801, Boone, IA

Built 2004 Load: 52.9 t ADT: 26

110TH ST

Good

Over: TRIB OF SQUAW CREEK

085251001, Boone, IA

Built 2018 Load: 55.7 t ADT: 30

FM

Poor

Over: LITTLE BEAVER CREEK

082273302, Boone, IA

Built 1973 Load: 3.3 t ADT: 45

LOCAL

Poor

Over: BEAVER CREEK

082280304, Boone, IA

Built 1915 Load: 3.6 t ADT: 20

FIELD ENTRANCE

Poor

Over: TRIB DES MOINES RIVER

084272305, Boone, IA

Built 1900 Load: 3.8 t ADT: 40

160TH ST

Poor

Over: BEAVER CREEK

084280401, Boone, IA

Built 1915 Load: 10.5 t ADT: 5

FM

Poor

Over: BLUFF CREEK

085273101, Boone, IA

Built 1915 Load: 12.6 t ADT: 50

LOCAL

Poor

Over: MONTGOMERY CREEK

085262501, Boone, IA

Built 1900 Load: 13.6 t ADT: 34

FM

Poor

Over: BR IOWAY CREEK

085250403, Boone, IA

Built 1916 Load: 13.9 t ADT: 20

LOCAL

Poor

Over: DES MOINES RIVER

082260305, Boone, IA

Built 1930 Load: 15.3 t ADT: 34

LOCAL

Poor

Over: LITTLE BEAVER CREEK

082273308, Boone, IA

Built 1939 Load: 16.1 t ADT: 26

LOCAL

Poor

Over: BIG CREEK

082252902, Boone, IA

Built 1900 Load: 16.3 t ADT: 90

LOCAL

Poor

Over: PRAIRIE CREEK

084250402, Boone, IA

Built 1915 Load: 16.3 t ADT: 30

LOCAL

Poor

Over: BEAVER CREEK

084282802, Boone, IA

Built 1900 Load: 17.3 t ADT: 11

LOCAL

Poor

Over: SQUAW CREEK

085252501, Boone, IA

Built 1900 Load: 17.8 t ADT: 15

LOCAL

Poor

Over: BEAVER CREEK

084283301, Boone, IA

Built 1920 Load: 18.0 t ADT: 20

LOCAL

Poor

Over: BEAVER CREEK

084282701, Boone, IA

Built 1920 Load: 18.3 t ADT: 20

FM

Poor

Over: IOWAY CREEK

085253501, Boone, IA

Built 1949 Load: 20.2 t ADT: 50

LOCAL

Poor

Over: MONTGOMERY CREEK

085253404, Boone, IA

Built 1915 Load: 20.4 t ADT: 15

LOCAL

Poor

Over: BIG CREEK

083261301, Boone, IA

Built 1915 Load: 22.6 t ADT: 26

LOCAL

Poor

Over: LITTLE BEAVER CREEK

082271901, Boone, IA

Built 1915 Load: 23.5 t ADT: 40

LOCAL

Poor

Over: BEAVER CREEK

084282901, Boone, IA

Built 1915 Load: 26.6 t ADT: 11

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