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)

SR D-65

Unknown

Over: I-35

AT JUNCTION WITH I-35, Hamilton, IA

Built 1965 ADT: 26,100

NB I-35

Unknown

Over: CO RD D-25

AT JUNCTION WITH SR D25, Hamilton, IA

Built 1974 ADT: 1,090

I 35 SB

Unknown

Over: SR D25

AT JUNCTION WITH SR D25, Hamilton, IA

Built 1974 ADT: 1,090

NB I-35

Unknown

Over: CC RR & 210TH ST

1.1 MI N OF SR D25, Hamilton, IA

Built 1972 ADT: 40

SR D-20

Unknown

Over: I-35

AT JUNCTION WITH D20, Hamilton, IA

Built 1972 ADT: 16,000

SB I-35

Unknown

Over: CC RR & 210TH ST

1.1 MILES NORTH OF SR D25, Hamilton, IA

Built 1972 ADT: 20

LOCKWOOD AVE

Unknown

Over: US 20

3.0 MILE E OF E JCT IA 17, Hamilton, IA

Built 1975 ADT: 10,100

EB US 20

Unknown

Over: R-38

AT JUNCTION WITH SR R38, Hamilton, IA

Built 1975 ADT: 235

WB US 20

Unknown

Over: R-38

AT JUNCTION WITH SR R38, Hamilton, IA

Built 1975 ADT: 235

POPLAR GROVE AVE

Unknown

Over: US 20

2.0 MILES W OF JCT US 69, Hamilton, IA

Built 1975 ADT: 10,300

IA 17

Unknown

Over: US 20

AT NORTH JCT WITH US 20, Hamilton, IA

Built 1978 ADT: 9,700

EB 20 & SB 17

Unknown

Over: R-27

0.8 MI W OF E JCT IA 17, Hamilton, IA

Built 1978 ADT: 475

WB 20 & NB 17

Unknown

Over: R-27

0.8 MI W OF E JCT IA 17, Hamilton, IA

Built 1978 ADT: 475

CO RD R 61

Unknown

Over: U.S. 20

0.5 MILE EAST OF JCT I-35, Hamilton, IA

Built 1990 ADT: 3,450

FM RD R 77

Unknown

Over: US 20

2.5 MILES E OF JCT I-35, Hamilton, IA

Built 1990 ADT: 8,700

ZIEGLER AVE

Unknown

Over: US 20

2.0 MILES EAST OF SR R77, Hamilton, IA

Built 1990 ADT: 8,900

LOCAL

Fair

Over: SKUNK RIVER

087242405, Hamilton, IA

Built 1952 Load: 13.2 t ADT: 90

LOCAL

Fair

Over: SKUNK RIVER

088233001, Hamilton, IA

Built 1949 Load: 17.1 t ADT: 15

LOCAL

Fair

Over: WHITE FOX CR

089251503, Hamilton, IA

Built 1955 Load: 18.6 t ADT: 40

LOCAL

Fair

Over: LONG DICK CR

086231601, Hamilton, IA

Built 1955 Load: 19.5 t ADT: 15

LOCAL

Fair

Over: LONG DICK CR

086232101, Hamilton, IA

Built 1955 Load: 19.5 t ADT: 26

LOCAL

Fair

Over: KEIGLEY CREEK

086243002, Hamilton, IA

Built 1955 Load: 19.5 t ADT: 20

LOCAL

Fair

Over: KEIGLEY CR

086243202, Hamilton, IA

Built 1954 Load: 19.5 t ADT: 15

FM

Fair

Over: SKUNK RIVER

087241201, Hamilton, IA

Built 1955 Load: 19.5 t ADT: 26

LOCAL

Fair

Over: SKUNK RIVER

087241202, Hamilton, IA

Built 1955 Load: 19.5 t ADT: 20

LOCAL

Fair

Over: SKUNK RIVER

087243606, Hamilton, IA

Built 1952 Load: 19.7 t ADT: 100

LOCAL

Fair

Over: DRAINAGE DITCH

089230902, Hamilton, IA

Built 1924 Load: 21.4 t ADT: 26

IA 17

Fair

Over: IOWAY CREEK

0.9 MILE S OF JCT SR D65, Hamilton, IA

Built 1979 Load: 21.7 t ADT: 2,260

US 20 & IA 17

Fair

Over: WATERWAY

2.1 MI E OF W JCT IA 17, Hamilton, IA

Built 1977 Load: 24.0 t ADT: 11,200

FM

Fair

Over: IOWAY CREEK

086262502, Hamilton, IA

Built 1924 Load: 25.0 t ADT: 20

WB US 20

Fair

Over: BOONE RIVER/REC TRAIL

1.2 MI E OF E JCT IA 17, Hamilton, IA

Built 1974 Load: 25.1 t ADT: 5,050

I 35

Fair

Over: DRAINAGE DITCH

0.8 MILE S OF JCT IA 175, Hamilton, IA

Built 1966 Load: 25.3 t ADT: 27,100

FM

Fair

Over: SKUNK RIVER

088243601, Hamilton, IA

Built 1962 Load: 26.3 t ADT: 270

EB US 20

Fair

Over: BOONE RIVER

1.2 MI E OF E JCT IA 17, Hamilton, IA

Built 1974 Load: 27.4 t ADT: 5,050

LOCAL

Fair

Over: DRAINAGE DITCH

089261306, Hamilton, IA

Built 1929 Load: 27.5 t ADT: 11

2ND ST

Fair

Over: BOONE RIVER

000000000, Hamilton, IA

Built 1950 Load: 27.7 t ADT: 3,797

FM

Fair

Over: DRAINAGE DITCH

088263102, Hamilton, IA

Built 1924 Load: 28.6 t ADT: 50

LOCAL

Fair

Over: WHITE FOX CR

089250303, Hamilton, IA

Built 1978 Load: 29.9 t ADT: 30

LOCAL

Fair

Over: CREEK

088251601, Hamilton, IA

Built 1926 Load: 32.6 t ADT: 20

KANTOR AVE

Fair

Over: LYONS CREEK

089253406, Hamilton, IA

Built 2003 Load: 32.7 t ADT: 270

FM

Fair

Over: BOONE RIVER

087263010, Hamilton, IA

Built 1939 Load: 32.9 t ADT: 478

LOCAL

Fair

Over: KEIGLEY CR

086243101, Hamilton, IA

Built 1977 Load: 33.0 t ADT: 15

LOCAL

Fair

Over: CROOKED CREEK

086251802, Hamilton, IA

Built 1970 Load: 33.0 t ADT: 15

LOCAL

Fair

Over: DRAINAGE DITCH

089231503, Hamilton, IA

Built 1970 Load: 33.0 t ADT: 26

LOCAL

Fair

Over: DRAINAGE DITCH

089231503, Hamilton, IA

Built 1970 Load: 33.0 t ADT: 26

IA 175

Fair

Over: DRAINAGE DITCH

0.2 MI. E OF E JCT. US 69, Hamilton, IA

Built 1977 Load: 33.4 t ADT: 1,690

FM

Fair

Over: BOONE RIVER

087261406, Hamilton, IA

Built 1973 Load: 34.3 t ADT: 429

FM

Fair

Over: BUCK CREEK

089252303, Hamilton, IA

Built 1975 Load: 37.2 t ADT: 240

LOCAL

Fair

Over: CREEK

088250906, Hamilton, IA

Built 1918 Load: 37.5 t ADT: 11

I-35

Fair

Over: TUTTLE CREEK

0.2 MILE N OF JCT US 20, Hamilton, IA

Built 1967 Load: 39.2 t ADT: 16,800

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

Related

Browse all → | Rankings →
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.