Hamilton County, IA

134 public highway bridges

Hamilton County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Hamilton County, Iowa contains 134 public highway bridges. Roughly 32.1% are rated “Good,” 31.3% “Fair,” and 24.6% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

134

Total Bridges

32.1%

Good

31.3%

Fair

24.6%

Poor Condition

Condition Distribution

Good

32.1% (43)

Fair

31.3% (42)

Poor

24.6% (33)

All Bridges (134)

Sort:

US 20

Over: DRAINAGE DITCH #4

1.8 MILES EAST OF US 69, Hamilton, IA

Built 1968 Load: 40.2 t ADT: 9,600

I 35 NB

Over: STREAM

1.8 MILES N OF SEC RD D20, Hamilton, IA

Built 1972 Load: 42.0 t ADT: 8,200

SB I-35

Over: STREAM

1.8 MILES N OF SEC RD D20, Hamilton, IA

Built 1972 Load: 42.0 t ADT: 8,200

OVERPASS DR

Over: CC RR

000000000, Hamilton, IA

Built 1931 Load: 47.7 t ADT: 3,353

FM

Over: IOWAY CREEK

086262202, Hamilton, IA

Built 1982 Load: 56.9 t ADT: 559

LOCAL

Over: DRAINAGE DITCH

087240703, Hamilton, IA

Built 1971 Load: 99.9 t ADT: 20

FM

Over: DRAINAGE DITCH

087253601, Hamilton, IA

Built 1976 Load: 99.9 t ADT: 509

FM

Over: BUCK CREEK

089252206, Hamilton, IA

Built 1975 Load: 99.9 t ADT: 199

I 35

Over: STREAM

0.3 MILE NORTH OF SR D65, Hamilton, IA

Built 1965 Load: 28.8 t ADT: 26,800

370TH ST

Over: DRAINAGE DITCH

086262401, Hamilton, IA

Built 2017 Load: 32.4 t ADT: 20

D41 280TH ST

Over: CREEK

087250203, Hamilton, IA

Built 2015 Load: 32.4 t ADT: 234

280TH ST

Over: BOONE RIVER

087250601, Hamilton, IA

Built 2019 Load: 32.4 t ADT: 80

ZIEGLER AVE

Over: BEAR CR

086232402, Hamilton, IA

Built 2012 Load: 32.7 t ADT: 60

380TH ST

Over: LONG DICK CREEK

086232701, Hamilton, IA

Built 2000 Load: 32.7 t ADT: 797

FM

Over: LONG DICK CREEK

086233504, Hamilton, IA

Built 1997 Load: 32.7 t ADT: 559

LOCAL

Over: KEIGLEY CREEK

086252201, Hamilton, IA

Built 1994 Load: 32.7 t ADT: 50

FM

Over: KEIGLEY CREEK

086252501, Hamilton, IA

Built 1999 Load: 32.7 t ADT: 589

LOCAL

Over: PRAIRIE CR

087262003, Hamilton, IA

Built 2006 Load: 32.7 t ADT: 26

FM

Over: DRAINAGE DITCH

088233601, Hamilton, IA

Built 2005 Load: 32.7 t ADT: 265

LOCAL

Over: DRAINAGE DITCH

088241402, Hamilton, IA

Built 2011 Load: 32.7 t ADT: 11

240TH ST

Over: DRAINAGE DITCH

088241501, Hamilton, IA

Built 2011 Load: 32.7 t ADT: 50

TOLLMAN AVE

Over: DRAINAGE DITCH

088242402, Hamilton, IA

Built 2012 Load: 32.7 t ADT: 45

FM

Over: BREWERS CREEK

088261003, Hamilton, IA

Built 1978 Load: 32.7 t ADT: 131

160TH ST

Over: DRAINAGE DITCH

089230201, Hamilton, IA

Built 2010 Load: 32.7 t ADT: 30

170TH ST

Over: DRAINAGE DITCH

089230801, Hamilton, IA

Built 2012 Load: 32.7 t ADT: 11

LOCAL

Over: DRAINAGE DITCH

089231003, Hamilton, IA

Built 2005 Load: 32.7 t ADT: 11

LOCAL

Over: BUCK CR

089250103, Hamilton, IA

Built 2008 Load: 32.7 t ADT: 26

175TH ST

Over: BUCK CREEK

089251203, Hamilton, IA

Built 2000 Load: 32.7 t ADT: 30

MCMURRAY AVE

Over: KEIGLEY BRANCH

086252302, Hamilton, IA

Built 2017 Load: 33.0 t ADT: 34

IA 175

Over: UP RR

0.5 MILE E OF E JCT US 69, Hamilton, IA

Built 1979 Load: 34.5 t ADT: 1,690

203RD ST

Over: LYON CREEK

089252603, Hamilton, IA

Built 2019 Load: 34.7 t ADT: 40

FM

Over: BOONE RIVER

089260104, Hamilton, IA

Built 2009 Load: 34.9 t ADT: 509

LOCAL

Over: PRAIRIE CR

087260503, Hamilton, IA

Built 2008 Load: 35.6 t ADT: 20

LOCAL

Over: SKUNK RIVER

087242402, Hamilton, IA

Built 1993 Load: 36.4 t ADT: 30

LOCAL

Over: IOWAY CREEK

086262602, Hamilton, IA

Built 1988 Load: 37.4 t ADT: 11

280TH ST

Over: SKUNK RIVER

087240101, Hamilton, IA

Built 2020 Load: 38.2 t ADT: 34

360TH ST

Over: SKUNK RIVER

086241405, Hamilton, IA

Built 2013 Load: 39.9 t ADT: 80

260TH ST

Over: DRAINAGE DITCH

088232501, Hamilton, IA

Built 2017 Load: 40.5 t ADT: 34

I-35

Over: DRAINAGE DITCH 23 & 31

1.0 MILE N OF JCT SR D20, Hamilton, IA

Built 1972 Load: 41.1 t ADT: 16,400

LOCAL

Over: DRAINAGE DITCH

087242801, Hamilton, IA

Built 2006 Load: 41.5 t ADT: 379

FM

Over: LONG DICK CREEK

086233504, Hamilton, IA

Built 1997 Load: 43.2 t ADT: 559

BEACH ST

Over: BREWERS CREEK

088261204, Hamilton, IA

Built 1995 Load: 45.5 t ADT: 1,745

390TH ST

Over: DRAINAGE DITCH

086263203, Hamilton, IA

Built 2004 Load: 47.0 t ADT: 20

XIRCUS AVE

Over: LONG DICK CREEK

086232202, Hamilton, IA

Built 2022 Load: 47.3 t ADT: 30

LOCAL

Over: CREEK

086241102, Hamilton, IA

Built 2006 Load: 48.2 t ADT: 71

LOCAL

Over: WHITE FOX CREEK

089252803, Hamilton, IA

Built 1994 Load: 52.9 t ADT: 34

LOCAL

Over: IOWAY CREEK

086262101, Hamilton, IA

Built 1991 Load: 56.9 t ADT: 71

LOCAL

Over: BUCK CREEK

089251405, Hamilton, IA

Built 1994 Load: 58.4 t ADT: 71

US 20

Over: DRAINAGE DITCH #4

0.7 MILE E OF JCT US 69, Hamilton, IA

Built 1968 Load: 61.6 t ADT: 9,600

FM

Over: DRAINAGE DITCH

087251108, Hamilton, IA

Built 2004 Load: 99.9 t ADT: 249

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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