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)

Sort:

FM

Over: SMALL STREAM

089093606, Buchanan, IA

Built 1966 Load: 30.8 t ADT: 167

FM 250TH ST

Over: BUFFALO CREEK

088071603, Buchanan, IA

Built 1994 Load: 31.1 t ADT: 69

FM

Over: LITTLE SPRING CREEK

088103106, Buchanan, IA

Built 1987 Load: 31.2 t ADT: 1,070

FM

Over: SMALL STREAM

090072307, Buchanan, IA

Built 1970 Load: 31.4 t ADT: 599

FM

Over: SMALL STREAM

090072403, Buchanan, IA

Built 1970 Load: 31.4 t ADT: 599

FM

Over: SMALL STREAM

090073104, Buchanan, IA

Built 1968 Load: 31.4 t ADT: 982

LOC KEOKUK AVE

Over: SMALL STREAM

090090208, Buchanan, IA

Built 1976 Load: 31.4 t ADT: 154

FM

Over: SMITH CREEK

088083506, Buchanan, IA

Built 2003 Load: 32.1 t ADT: 324

LOCAL KING AVE

Over: SMALL STREAM

087092602, Buchanan, IA

Built 1970 Load: 32.4 t ADT: 62

FM VINCENT AV

Over: SMALL STREAM

088071502, Buchanan, IA

Built 1955 Load: 32.4 t ADT: 137

LOCAL 255TH ST

Over: SMALL STREAM

088082305, Buchanan, IA

Built 2006 Load: 32.4 t ADT: 11

LOCAL 240TH ST

Over: LIME CR

088101401, Buchanan, IA

Built 1967 Load: 32.4 t ADT: 34

LOCAL 180TH ST.

Over: PRAIRIE CREEK

089071601, Buchanan, IA

Built 1997 Load: 32.4 t ADT: 20

FM

Over: SMALL STREAM

089082204, Buchanan, IA

Built 1970 Load: 32.4 t ADT: 59

FM

Over: SMALL STREAM

089082803, Buchanan, IA

Built 1960 Load: 32.4 t ADT: 34

175TH AVE

Over: SMALL STREAM

089100703, Buchanan, IA

Built 1995 Load: 32.4 t ADT: 33

FM

Over: DRAINAGE DITCH

090071003, Buchanan, IA

Built 1955 Load: 32.4 t ADT: 44

LOC 100TH ST

Over: STREAM

090090201, Buchanan, IA

Built 1995 Load: 32.4 t ADT: 128

DEAD END 115 ST

Over: SMALL STREAM

000000000, Buchanan, IA

Built 1968 Load: 32.4 t ADT: 11

FM

Over: STREAM

089071902, Buchanan, IA

Built 1965 Load: 32.4 t ADT: 982

310TH STREET

Over: STREAM

087102301, Buchanan, IA

Built 2005 Load: 32.4 t ADT: 51

250TH ST

Over: UNNAMED CREEK

8808240100, Buchanan, IA

Built 2010 Load: 32.4 t ADT: 41

LOCAL 275TH ST

Over: SMITH CR

088083505, Buchanan, IA

Built 2002 Load: 32.6 t ADT: 26

IA 150

Over: WAPSIPINICON RIVER

IN INDEPENDENCE, Buchanan, IA

Built 1927 Load: 32.7 t ADT: 9,000

DANIAL AVE

Over: MUD CR

087101602, Buchanan, IA

Built 1989 Load: 32.7 t ADT: 73

270TH ST

Over: LIME CREEK

088103501, Buchanan, IA

Built 2015 Load: 32.7 t ADT: 30

LOCAL

Over: OTTER CREEK

090091603, Buchanan, IA

Built 1997 Load: 32.7 t ADT: 295

LOC 100TH ST

Over: W BRANCH BUFFALO CK

090080501, Buchanan, IA

Built 1979 Load: 32.8 t ADT: 79

220TH ST

Over: SMALL NATURAL STREAM

088100615, Buchanan, IA

Built 1999 Load: 33.7 t ADT: 2,494

LOCAL

Over: SMALL STREAM

088081502, Buchanan, IA

Built 1940 Load: 35.0 t ADT: 35

FM

Over: BUCK CREEK

090101801, Buchanan, IA

Built 1980 Load: 35.6 t ADT: 1,493

FM

Over: BUCK CREEK

090102006, Buchanan, IA

Built 1972 Load: 36.9 t ADT: 1,277

IA 150

Over: HARTE CREEK

0.2 mi. N OF Jct. SR D16, Buchanan, IA

Built 1984 Load: 39.1 t ADT: 3,890

IA 281

Over: LITTLE WAPSIPINICON RVR

0.2 mi. E of SR V62, Buchanan, IA

Built 1954 Load: 39.6 t ADT: 2,670

US 20

Over: DRY CREEK

0.6 MI. W OF Jct. SR W40, Buchanan, IA

Built 1979 Load: 40.5 t ADT: 8,300

HAMILTON AVE

Over: BEAR CR

087093004, Buchanan, IA

Built 2006 Load: 42.1 t ADT: 59

FM

Over: OTTER CREEK

089091907, Buchanan, IA

Built 2001 Load: 42.1 t ADT: 805

WB US 20

Over: BUFFALO CREEK

2.3 MI. E OF JCT. SR W40, Buchanan, IA

Built 1978 Load: 44.9 t ADT: 3,500

EB US 20

Over: BUFFALO CREEK

2.3 MI. E OF JCT. SR W40, Buchanan, IA

Built 1978 Load: 45.8 t ADT: 3,500

SB I-380

Over: LIME CREEK

0.7 MI. N OF JCT. SR D48, Buchanan, IA

Built 1984 Load: 46.8 t ADT: 8,850

EB US 20

Over: PINE CREEK

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

Built 1978 Load: 47.6 t ADT: 4,150

NB I-380

Over: LIME CREEK

0.6 MI. N OF JCT. SR D48, Buchanan, IA

Built 1984 Load: 48.1 t ADT: 8,850

LOC KENTUCKY AV

Over: SMALL STREAM

090092302, Buchanan, IA

Built 2002 Load: 49.5 t ADT: 41

FM

Over: SMALL CREEK

090101605, Buchanan, IA

Built 1998 Load: 50.0 t ADT: 1,650

142ND ST

Over: W BRANCH BUFFALO CR

9008277423, Buchanan, IA

Built 2011 Load: 51.3 t ADT: 47

FM 280TH ST.

Over: SPRING CREEK

087100601, Buchanan, IA

Built 1952 Load: 51.6 t ADT: 246

LOCAL 250TH ST

Over: PINE CR

088082003, Buchanan, IA

Built 2004 Load: 52.5 t ADT: 82

LOCAL 170TH ST.

Over: PINE CREEK

089080801, Buchanan, IA

Built 2009 Load: 52.8 t ADT: 47

LOCAL

Over: BUFFALO CREEK

088070609, Buchanan, IA

Built 1998 Load: 52.9 t ADT: 51

FM

Over: PINE CREEK

088082105, Buchanan, IA

Built 1991 Load: 52.9 t ADT: 776

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