Grundy County, IA

270 public highway bridges

Grundy County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Grundy County, Iowa contains 270 public highway bridges. Roughly 37.4% are rated “Good,” 30% “Fair,” and 25.9% “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.

270
Total Bridges
37.4%
Good
30%
Fair
25.9%
Poor Condition

Condition Distribution

Good
37.4% (101)
Fair
30% (81)
Poor
25.9% (70)

All Bridges (270)

US 20 WB

Unknown

Over: GRUNDY RD

AT JUNCTION SR D18, Grundy, IA

Built 2000 ADT: 535

US 20 EB

Unknown

Over: GRUNDY RD

AT JUNCTION WITH SR D18, Grundy, IA

Built 2000 ADT: 535

X AVENUE

Unknown

Over: US 20

2.0 MILES WEST OF SR D18, Grundy, IA

Built 1999 ADT: 14,500

T-53 (S AVE)

Unknown

Over: US 20

2.0 mi. W of SR T55, Grundy, IA

Built 1999 ADT: 13,600

US 20 EB

Unknown

Over: SR T55

AT JUNCTION WITH SR T55, Grundy, IA

Built 2000 ADT: 945

WB US 20

Unknown

Over: SR T55

AT JUNCTION WITH SR T55, Grundy, IA

Built 2000 ADT: 945

US 20 EB

Unknown

Over: IA 14

AT JUNCTION IA 14, Grundy, IA

Built 2000 ADT: 2,400

T47 (Q AVE)

Unknown

Over: US 20

3.0 MILES E OF JCT IA 14, Grundy, IA

Built 1999 ADT: 13,600

VISTA AVE

Unknown

Over: US 20

1.6 MILES EAST OF SR T55, Grundy, IA

Built 1999 ADT: 14,500

US 20 WB

Unknown

Over: IA 14

AT JUNCTION WITH IA 14, Grundy, IA

Built 2000 ADT: 2,400

D AVENUE

Unknown

Over: US 20

2.0 MILES W OF JCT SR T19, Grundy, IA

Built 2003 ADT: 9,900

B AVENUE

Unknown

Over: US 20

4.0 MILES W OF JCT SR T19, Grundy, IA

Built 2003 ADT: 9,900

L AVENUE

Unknown

Over: US 20

2.0 MILES W OF JCT IA 14, Grundy, IA

Built 2003 ADT: 10,100

J AVENUE

Unknown

Over: US 20

4.0 MILES W OF JCT IA 14, Grundy, IA

Built 2003 ADT: 10,100

US 20 WB

Unknown

Over: H AVENUE

2.0 MILES EAST JCT SR T19, Grundy, IA

Built 2003 ADT: 50

US 20 EB

Unknown

Over: H AVENUE

2.0 mi. E of jct SR T19, Grundy, IA

Built 2003 ADT: 50

US 20 WB

Unknown

Over: SR T19

AT JUNCTION WITH SR T19, Grundy, IA

Built 2003 ADT: 740

US 20 EB

Unknown

Over: T 19

AT JUNCTION WITH SR T19, Grundy, IA

Built 2003 ADT: 740

LOCAL

Fair

Over: BRANCH BEAR CREEK

087183202, Grundy, IA

Built 1954 Load: 15.7 t ADT: 39

FM

Fair

Over: DOWD CREEK

087183402, Grundy, IA

Built 1956 Load: 15.7 t ADT: 29

LOCAL

Fair

Over: BRANCH BEAVER CREEK

088180804, Grundy, IA

Built 1956 Load: 15.7 t ADT: 78

LOCAL

Fair

Over: BRANCH BEAVER CREEK

088181002, Grundy, IA

Built 1955 Load: 15.7 t ADT: 15

LOCAL ROAD

Fair

Over: MIDDLE FORK BEAVER CREEK

089172802, Grundy, IA

Built 1957 Load: 15.7 t ADT: 15

FM

Fair

Over: BEAVER CREEK ,SOUTH FORK

089173301, Grundy, IA

Built 1956 Load: 15.7 t ADT: 20

LOCAL

Fair

Over: BRANCH BEAVER CREEK

089181702, Grundy, IA

Built 1957 Load: 15.7 t ADT: 44

FM

Fair

Over: BEAVER CREEK ,BRANCH

089182001, Grundy, IA

Built 1954 Load: 15.7 t ADT: 79

LOCAL

Fair

Over: BRANCH BLACKHAWK CREEK

088171202, Grundy, IA

Built 1957 Load: 15.9 t ADT: 26

LOCAL

Fair

Over: BRANCH BEAVER CREEK

089160401, Grundy, IA

Built 1955 Load: 15.9 t ADT: 20

LOCAL

Fair

Over: BRANCH BLACKHAWK CREEK

089163601, Grundy, IA

Built 1956 Load: 15.9 t ADT: 20

205TH ST

Fair

Over: DRAINAGE DITCH

088182903, Grundy, IA

Built 1955 Load: 18.7 t ADT: 491

LOCAL RD

Fair

Over: BRANCH BLACKHAWK CREEK

089163501, Grundy, IA

Built 1971 Load: 19.0 t ADT: 26

FM

Fair

Over: BLACK HAWK CREEK

088171901, Grundy, IA

Built 1900 Load: 19.7 t ADT: 354

LOCAL RD

Fair

Over: BRANCH BLACKHAWK CREEK

089162501, Grundy, IA

Built 1966 Load: 21.9 t ADT: 33

FM

Fair

Over: BLACKHAWK CREEK ,BRANCH

087160102, Grundy, IA

Built 1966 Load: 22.1 t ADT: 579

IA 175

Fair

Over: STREAM

0.1 MILE W OF W JCT IA 14, Grundy, IA

Built 1962 Load: 22.1 t ADT: 1,090

S75 B AVE

Fair

Over: BRANCH OF BEAR CREEK

087181902, Grundy, IA

Built 1966 Load: 22.7 t ADT: 442

FM

Fair

Over: BRANCH BEAVER CREEK

089173402, Grundy, IA

Built 1971 Load: 24.5 t ADT: 39

FM

Fair

Over: BRANCH BEAR CREEK

087183101, Grundy, IA

Built 1964 Load: 24.6 t ADT: 98

FM

Fair

Over: BRANCH BEAR CREEK

087183102, Grundy, IA

Built 1966 Load: 24.8 t ADT: 520

FM

Fair

Over: BEAR CREEK ,BRANCH

087183201, Grundy, IA

Built 1964 Load: 24.8 t ADT: 98

LOCAL

Fair

Over: BLACK HAWK CREEK

088160802, Grundy, IA

Built 1983 Load: 25.2 t ADT: 20

LOCAL

Fair

Over: MIDDLE FORK BEAVER CREEK

089173002, Grundy, IA

Built 1978 Load: 25.3 t ADT: 5

LOCAL

Fair

Over: CREEK

086182501, Grundy, IA

Built 1978 Load: 25.7 t ADT: 44

FM

Fair

Over: BRANCH BEAR CREEK

086180602, Grundy, IA

Built 1967 Load: 26.3 t ADT: 520

FM

Fair

Over: SOUTH FORK BEAVER CREEK

089183606, Grundy, IA

Built 1980 Load: 27.3 t ADT: 953

FM

Fair

Over: DOWD CREEK, BRANCH

086182001, Grundy, IA

Built 1965 Load: 28.4 t ADT: 187

FM

Fair

Over: MIDDLE FORK BEAVER CREEK

089182502, Grundy, IA

Built 1978 Load: 28.6 t ADT: 953

LOCAL

Fair

Over: BLACKHAWK CREEK

088161302, Grundy, IA

Built 1957 Load: 29.3 t ADT: 26

FM

Fair

Over: BLACK HAWK CREEK

088161502, Grundy, IA

Built 1984 Load: 29.8 t ADT: 29

LOCAL ROAD

Fair

Over: BRANCH RIVER CREEK

089161801, Grundy, IA

Built 1955 Load: 29.8 t ADT: 78

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

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.