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)

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.

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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.