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)

B AVE

Good

Over: CEDAR CREEK

087180702, Grundy, IA

Built 2020 Load: 32.7 t ADT: 39

I AVE

Good

Over: BLACK HAWK CREEK

088172002, Grundy, IA

Built 2021 Load: 32.7 t ADT: 49

L AVE

Good

Over: BLACK HAWK CREEK

088171102, Grundy, IA

Built 2022 Load: 32.7 t ADT: 33

LUITJENS LANE

Good

Over: FORK OF BLACKHAWK CREEK

088150501, Grundy, IA

Built 1999 Load: 32.7 t ADT: 27

FM

Good

Over: SMALL STREAM

088160302, Grundy, IA

Built 1999 Load: 32.7 t ADT: 69

165TH STREET

Good

Over: BR BEAVER CREEK

088180205, Grundy, IA

Built 2003 Load: 32.7 t ADT: 59

T-19

Good

Over: DRAINAGE

088180212, Grundy, IA

Built 2003 Load: 32.7 t ADT: 2,082

US 20 EB

Good

Over: STREAM

0.9 MILE W OF JCT SR T55, Grundy, IA

Built 2000 Load: 33.1 t ADT: 6,750

D55 (290TH ST)

Good

Over: BRANCH WOLF CREEK

86171101, Grundy, IA

Built 2013 Load: 33.7 t ADT: 44

120TH ST

Good

Over: N FORK BEAVER CREEK

089181501, Grundy, IA

Built 2016 Load: 33.7 t ADT: 29

LOCAL

Good

Over: BR HAMMERS CREEK

089151402, Grundy, IA

Built 2002 Load: 34.7 t ADT: 29

US 20 WB

Good

Over: STREAM

0.9 MILES W OF JCT SR T55, Grundy, IA

Built 2000 Load: 34.7 t ADT: 6,800

US 20 WB

Good

Over: S BEAVER CREEK

3.5 MILES W OF JCT SR T19, Grundy, IA

Built 2003 Load: 34.7 t ADT: 4,900

US 20 EB

Good

Over: S BEAVER CREEK

3.5 MILES W OF JCT SR T19, Grundy, IA

Built 2003 Load: 34.7 t ADT: 4,900

T47 Q AVE

Good

Over: MOSQUITO CREEK

087163402, Grundy, IA

Built 2022 Load: 35.0 t ADT: 628

EB US 20 RAMP B

Good

Over: STREAM

0.1 MILE W OF JCT SR T55, Grundy, IA

Built 2000 Load: 35.6 t ADT: 270

FM

Good

Over: DOWD CREEK

087183402, Grundy, IA

Built 1998 Load: 35.9 t ADT: 29

COUNTY ROAD

Good

Over: BRANCH BEAVER CREEK

089180702, Grundy, IA

Built 1998 Load: 35.9 t ADT: 20

LOCAL ROAD

Good

Over: BRANCH OF HAMMERS CREEK

089150201, Grundy, IA

Built 1999 Load: 36.3 t ADT: 29

LOCAL ROAD

Good

Over: BRANCH OF HAMMERS CREEK

089150301, Grundy, IA

Built 2007 Load: 37.0 t ADT: 29

FM

Good

Over: BLACKHAWK CREEK ,BRANCH

087171002, Grundy, IA

Built 1988 Load: 37.2 t ADT: 128

LOCAL

Good

Over: FK OF BEAVER CREEK

089171103, Grundy, IA

Built 1995 Load: 37.3 t ADT: 20

LOCAL

Good

Over: SMALL STREAM

087181002, Grundy, IA

Built 1999 Load: 37.3 t ADT: 78

LOCAL ROAD

Good

Over: BRANCH BLACK HAWK CREEK

087181202, Grundy, IA

Built 1990 Load: 37.4 t ADT: 49

US 20

Good

Over: STREAM

2.7 MILES W OF JCT SR T55, Grundy, IA

Built 1999 Load: 37.6 t ADT: 13,500

FM

Good

Over: BLACK HAWK CREEK

088172802, Grundy, IA

Built 2010 Load: 38.1 t ADT: 20

US 20 WB

Good

Over: SOUTH BEAVER CREEK

0.1 MILE W OF JCT SR T19, Grundy, IA

Built 2003 Load: 38.5 t ADT: 4,550

C AVE

Good

Over: BRANCH BEAVER CREEK

088180502, Grundy, IA

Built 2011 Load: 38.6 t ADT: 26

B AVENUE

Good

Over: TRIB TO BEAVER CREEK

089182002, Grundy, IA

Built 2006 Load: 38.8 t ADT: 39

WB US 20

Good

Over: LOCAL STREAM

0.1 MILES W OF JCT SR T55, Grundy, IA

Built 2000 Load: 38.8 t ADT: 6,500

R AVE

Good

Over: N FORK BLACK HAWK CREEK

089163602, Grundy, IA

Built 2022 Load: 38.9 t ADT: 39

LOCAL

Good

Over: BR BEAVER CREEK

088170604, Grundy, IA

Built 2001 Load: 39.0 t ADT: 97

LOCAL ROAD

Good

Over: BEAVER CREEK

089171501, Grundy, IA

Built 2003 Load: 40.0 t ADT: 33

LOCAL

Good

Over: BLACKHAWK CREEK

087160705, Grundy, IA

Built 1976 Load: 40.5 t ADT: 196

US 20 EB

Good

Over: SOUTH BEAVER CREEK

0.1 MILE W OF JCT SR T19, Grundy, IA

Built 2003 Load: 41.0 t ADT: 4,550

160TH ST

Good

Over: SOUTH FORK BEAVER CREEK

088170601, Grundy, IA

Built 2022 Load: 41.8 t ADT: 44

LOCAL

Good

Over: BLACKHAWK CREEK

087160902, Grundy, IA

Built 2002 Load: 42.5 t ADT: 29

R AVE

Good

Over: BRANCH BLACK HAWK CREEK

087161402, Grundy, IA

Built 2000 Load: 42.5 t ADT: 59

US 20 EB

Good

Over: LOCAL STREAM

0.1 MILE WEST JCT. SR T55, Grundy, IA

Built 1999 Load: 44.3 t ADT: 6,500

LOCAL ROAD

Good

Over: BRANCH BLACK HAWK CREEK

088151102, Grundy, IA

Built 2006 Load: 44.7 t ADT: 49

FM

Good

Over: BLACK HAWK CREEK

088152401, Grundy, IA

Built 1998 Load: 44.7 t ADT: 108

LOCAL ROAD

Good

Over: WOLF CREEK

086182601, Grundy, IA

Built 2001 Load: 45.7 t ADT: 59

LOCAL ROAD

Good

Over: RK BEAVER CREEK

088180602, Grundy, IA

Built 2002 Load: 48.2 t ADT: 59

D35 215TH ST

Good

Over: BLACKHAWK CREEK BRANCH

088153403, Grundy, IA

Built 2021 Load: 49.2 t ADT: 903

US 20

Good

Over: STREAM

2.0 MILES EAST OF SR T55, Grundy, IA

Built 1999 Load: 49.6 t ADT: 14,500

LOCAL RD

Good

Over: BLACK HAWK CREEK

088161402, Grundy, IA

Built 2007 Load: 50.0 t ADT: 29

LOCAL

Good

Over: BLACKHAWK CREEK BRANCH

089153102, Grundy, IA

Built 2004 Load: 50.0 t ADT: 49

LOCAL ROAD

Good

Over: MIDDLE FORK BEAVER CREEK

089182801, Grundy, IA

Built 2006 Load: 50.0 t ADT: 59

FM

Good

Over: FORK BEAVER CREEK

089182702, Grundy, IA

Built 2004 Load: 52.9 t ADT: 108

US 20

Good

Over: STREAM

0.3 MILES E OF JCT IA 14, Grundy, IA

Built 1999 Load: 57.0 t ADT: 8,800

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

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial