Buchanan County, IA

281 public highway bridges

Buchanan County Bridge Snapshot

Buchanan County, Iowa contains 281 public highway bridges in the FHWA National Bridge Inventory. Roughly 40.2% are rated “Good,” 48.4% “Fair,” 5.7% “Poor,” and 5.7% 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.

281
Total Bridges
40.2%
Good
5.7%
Poor
5.7%
Structurally Deficient

Condition Distribution

Good
40.2% (113)
Fair
48.4% (136)
Poor
5.7% (16)
SD
5.7% (16)

All Bridges (281)

RINGOLD AVE

Good

Over: DRAINAGE

.25 mi. north of 335th st, Buchanan, IA

Built 2015 Load: 32.4 t ADT: 73

270TH ST

Good

Over: SMALL STREAM

3540008807, Buchanan, IA

Built 2021 Load: 32.4 t ADT: 15

LOCAL 280TH ST.

Good

Over: SMALL STREAM

000087090601, Buchanan, IA

Built 2010 Load: 32.7 t ADT: 16

305TH ST

Good

Over: BEAR CREEK

S17 T87N R09W, Buchanan, IA

Built 2017 Load: 32.7 t ADT: 26

240TH ST

Good

Over: SMALL STREAM

8807152100, Buchanan, IA

Built 2016 Load: 32.7 t ADT: 29

FM YORK AVE

Good

Over: SMALL STREAM

088072502, Buchanan, IA

Built 2008 Load: 32.7 t ADT: 69

252ND ST

Good

Over: BEAR CREEK

088092103, Buchanan, IA

Built 2000 Load: 32.7 t ADT: 73

200TH ST

Good

Over: SMALL STREAM

089102701, Buchanan, IA

Built 2015 Load: 32.7 t ADT: 15

FM 115TH ST

Good

Over: SMALL STREAM

090070803, Buchanan, IA

Built 2005 Load: 32.7 t ADT: 49

POSTEL AVENUE

Good

Over: CREEK

090082204, Buchanan, IA

Built 2005 Load: 32.7 t ADT: 10

FM GABRIAL AV

Good

Over: LIME CREEK

088103602, Buchanan, IA

Built 1976 Load: 32.8 t ADT: 59

FM

Good

Over: WAPSIPINICON RIVER

089101309, Buchanan, IA

Built 1999 Load: 33.0 t ADT: 216

NOLAN AVE

Good

Over: WAPSIPINICON RIVER

088083204, Buchanan, IA

Built 1996 Load: 33.0 t ADT: 135

COOTS BLVD

Good

Over: SMALL CREEK

088083103, Buchanan, IA

Built 2015 Load: 33.7 t ADT: 79

NB I-380

Good

Over: BEAR CREEK

1.1 MI. S OF JCT. SR D48, Buchanan, IA

Built 1984 Load: 34.1 t ADT: 8,950

LOCAL

Good

Over: BUFFALO CREEK

087071202, Buchanan, IA

Built 2005 Load: 34.3 t ADT: 30

V65

Good

Over: SMALL STREAM

088100608, Buchanan, IA

Built 2014 Load: 34.7 t ADT: 2,917

QUONSET AVE

Good

Over: DRAINAGE

.5 mi. north of 325th st., Buchanan, IA

Built 2015 Load: 35.0 t ADT: 51

FM

Good

Over: BEAR CREEK

088091608, Buchanan, IA

Built 2006 Load: 36.3 t ADT: 177

310TH ST

Good

Over: SMALL STREAM

087082001, Buchanan, IA

Built 2019 Load: 36.6 t ADT: 44

FM

Good

Over: BUFFALO CREEK

087070205, Buchanan, IA

Built 2003 Load: 39.9 t ADT: 196

280TH ST

Good

Over: SMALL STREAM

087090201, Buchanan, IA

Built 2020 Load: 39.9 t ADT: 20

W35 QUASQUETON AVE

Good

Over: SMALL STREAM

087081502, Buchanan, IA

Built 2019 Load: 40.0 t ADT: 1,159

LOCAL 275TH ST

Good

Over: SPRING CR

088103105, Buchanan, IA

Built 2010 Load: 40.0 t ADT: 25

FM

Good

Over: LITTLE WAPSIPINICON

090101705, Buchanan, IA

Built 1996 Load: 40.0 t ADT: 1,650

W45 SLATER AVE

Good

Over: BUFFALO CREEK

089082511, Buchanan, IA

Built 2002 Load: 40.3 t ADT: 982

185TH ST

Good

Over: SMALL STREAM

089091703, Buchanan, IA

Built 2018 Load: 40.5 t ADT: 62

1ST ST EAST

Good

Over: MELONE CREEK

T89N-R9W-S35-N0.0-E14.5, Buchanan, IA

Built 2019 Load: 40.8 t ADT: 6,094

300TH ST

Good

Over: DRY CREEK

087071501, Buchanan, IA

Built 2014 Load: 40.8 t ADT: 41

235TH ST

Good

Over: SMALL STREAM

108808, Buchanan, IA

Built 2016 Load: 40.8 t ADT: 88

US 20

Good

Over: DRAINAGE DITCH

0.4 mi. W of jct. SR V65, Buchanan, IA

Built 1980 Load: 41.1 t ADT: 10,700

SB I-380

Good

Over: BEAR CREEK

1.2 MI. S OF JCT. SR D48, Buchanan, IA

Built 1984 Load: 41.2 t ADT: 8,950

D16 OTTERVILLE

Good

Over: SMALL STREAM

089092801, Buchanan, IA

Built 2019 Load: 41.7 t ADT: 805

YORK AVE

Good

Over: SMALL STREAM

S13 T88N R07W, Buchanan, IA

Built 2017 Load: 41.8 t ADT: 69

V62 BAXTER AVE

Good

Over: SMALL STREAM

089100802, Buchanan, IA

Built 2018 Load: 41.8 t ADT: 1,365

LOC GRANT AVE

Good

Over: SMALL STREAM

090093004, Buchanan, IA

Built 2005 Load: 42.1 t ADT: 91

US 20

Good

Over: DRAINAGE DITCH

4.6 mi. W of W jct. IA150, Buchanan, IA

Built 1980 Load: 42.4 t ADT: 10,100

FM 290TH ST

Good

Over: LIME CREEK

087101201, Buchanan, IA

Built 2004 Load: 42.8 t ADT: 344

W35 QUASQUETON AVE

Good

Over: SMALL CREEK

087081502, Buchanan, IA

Built 2019 Load: 43.3 t ADT: 1,159

120TH ST

Good

Over: HUNTER CREEK

090091803, Buchanan, IA

Built 2000 Load: 44.7 t ADT: 1,100

OVERLAND AVE

Good

Over: SAND CREEK

087082102, Buchanan, IA

Built 1995 Load: 45.4 t ADT: 20

FM 250TH ST

Good

Over: LIME CREEK

088102301, Buchanan, IA

Built 1989 Load: 45.4 t ADT: 69

LOCAL

Good

Over: SMALL STREAM

089100703, Buchanan, IA

Built 1995 Load: 45.4 t ADT: 33

QUONSET AVE

Good

Over: BUFFALO CREEK

090081404, Buchanan, IA

Built 2000 Load: 45.4 t ADT: 29

FM 155TH ST.

Good

Over: SMALL STREAM

090083203, Buchanan, IA

Built 2004 Load: 45.4 t ADT: 344

FM

Good

Over: SMALL STREAM

089072201, Buchanan, IA

Built 2007 Load: 45.7 t ADT: 59

LOC QUINN AVE

Good

Over: BUFFALO CR EAST BRANCH

090080202, Buchanan, IA

Built 2010 Load: 46.0 t ADT: 16

WB US 20

Good

Over: PINE CREEK

1.6 mi. W of jct. SR W40, Buchanan, IA

Built 1978 Load: 47.6 t ADT: 4,150

FM 310TH ST.

Good

Over: SAND CREEK

087082101, Buchanan, IA

Built 1995 Load: 48.2 t ADT: 35

FM

Good

Over: PRARIE CREEK

089072201, Buchanan, IA

Built 2007 Load: 48.2 t ADT: 59

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