Grundy County, IA

270 public highway bridges

Grundy County Bridge Snapshot

Grundy County, Iowa contains 270 public highway bridges in the FHWA National Bridge Inventory. Roughly 37.4% are rated “Good,” 30% “Fair,” 25.9% “Poor,” and 25.9% 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.

270
Total Bridges
37.4%
Good
25.9%
Poor
25.9%
Structurally Deficient

Condition Distribution

Good
37.4% (101)
Fair
30% (81)
Poor
25.9% (70)
SD
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 U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial