Montgomery County, IA

184 public highway bridges

Montgomery County Bridge Snapshot

Montgomery County, Iowa contains 184 public highway bridges in the FHWA National Bridge Inventory. Roughly 20.1% are rated “Good,” 52.7% “Fair,” 26.6% “Poor,” and 26.6% 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.

184
Total Bridges
20.1%
Good
26.6%
Poor
26.6%
Structurally Deficient

Condition Distribution

Good
20.1% (37)
Fair
52.7% (97)
Poor
26.6% (49)
SD
26.6% (49)

All Bridges (184)

FM

Good

Over: TARKIO CREEK

073371101, Montgomery, IA

Built 2006 Load: 25.5 t ADT: 259

FM

Good

Over: TRIBUTARY TO NODAWAY

071362102, Montgomery, IA

Built 2010 Load: 27.8 t ADT: 79

US 71

Good

Over: SIN CREEK

4.5 mi. S of Jct. SR H-14, Montgomery, IA

Built 1970 Load: 31.3 t ADT: 1,390

H54 265TH ST

Good

Over: WEST NODAWAY

071362803, Montgomery, IA

Built 2017 Load: 32.4 t ADT: 300

230TH ST

Good

Over: WALNUT CREEK

071390801, Montgomery, IA

Built 2019 Load: 32.4 t ADT: 15

M37 BOXELDER AVE

Good

Over: BNSF RR

072392804, Montgomery, IA

Built 2014 Load: 32.4 t ADT: 249

210TH ST

Good

Over: WALNUT CREEK

072393305, Montgomery, IA

Built 2019 Load: 32.4 t ADT: 30

H20 (150TH ST)

Good

Over: NISHNABOTNA RIVER

073383403, Montgomery, IA

Built 2013 Load: 32.4 t ADT: 159

SR N18 (T AVE)

Good

Over: TRIB W NODAWAY RIVER

071360406, Montgomery, IA

Built 2011 Load: 32.7 t ADT: 40

FM

Good

Over: NISHNABOTNA RIVER

072382913, Montgomery, IA

Built 2002 Load: 32.7 t ADT: 761

LOCAL

Good

Over: WALNUT CREEK

071393003, Montgomery, IA

Built 1978 Load: 32.8 t ADT: 20

FM-210TH STREET

Good

Over: MIDDLE NODAWAY RIVER

072363603, Montgomery, IA

Built 2004 Load: 33.3 t ADT: 100

LOCAL

Good

Over: CRAPABLE TREE

073393502, Montgomery, IA

Built 2000 Load: 33.7 t ADT: 5

LOCAL ROAD

Good

Over: BRANCH OF TARKIO CREEK

072373410, Montgomery, IA

Built 2003 Load: 35.6 t ADT: 1,404

US 71

Good

Over: LONG'S BRANCH

1.8 MI. N OF N JCT SR H34, Montgomery, IA

Built 1970 Load: 36.4 t ADT: 1,390

N18 T AVE

Good

Over: W NODAWAY RIVER

072363302, Montgomery, IA

Built 2015 Load: 37.9 t ADT: 29

FM

Good

Over: WALNUT CREEK

072391302, Montgomery, IA

Built 1988 Load: 38.2 t ADT: 61

LOCAL

Good

Over: TRIB SEVEN MILE

073362002, Montgomery, IA

Built 1999 Load: 38.2 t ADT: 20

FM

Good

Over: INDIAN CREEK

073393201, Montgomery, IA

Built 2010 Load: 38.2 t ADT: 20

FM

Good

Over: W NODAWAY RIVER

072360901, Montgomery, IA

Built 1999 Load: 38.5 t ADT: 60

FM

Good

Over: WEST NODAWAY

073363303, Montgomery, IA

Built 2003 Load: 39.9 t ADT: 71

FM

Good

Over: NISHNABOTNA RIVER

072382903, Montgomery, IA

Built 1997 Load: 40.1 t ADT: 2,231

FM

Good

Over: SEVEN MILE CREEK

073360801, Montgomery, IA

Built 2007 Load: 41.0 t ADT: 259

LOCAL

Good

Over: NISHNABOTNA TRIB

072380201, Montgomery, IA

Built 2003 Load: 41.4 t ADT: 40

250TH ST

Good

Over: WALNUT CREEK

071391903, Montgomery, IA

Built 2011 Load: 42.4 t ADT: 30

H20 140TH ST

Good

Over: SEVEN MILE CREEK

073362901, Montgomery, IA

Built 2022 Load: 42.4 t ADT: 29

100TH ST

Good

Over: DRAINAGE

073360505, Montgomery, IA

Built 2015 Load: 49.9 t ADT: 15

LOCAL ROAD

Good

Over: TARKIO CREEK

073372201, Montgomery, IA

Built 1996 Load: 50.3 t ADT: 34

IA 48

Good

Over: MORMAN BRANCH CREEK

3.8 MI. S OF U.S. 34, Montgomery, IA

Built 1987 Load: 52.2 t ADT: 2,000

M37 BOXELDER AVE

Good

Over: CRABAPPLE CREEK

072391604, Montgomery, IA

Built 2021 Load: 52.5 t ADT: 100

LOCAL

Good

Over: INDIAN CREEK

072390801, Montgomery, IA

Built 1994 Load: 52.7 t ADT: 26

FM

Good

Over: TARKIO CREEK

073372202, Montgomery, IA

Built 1994 Load: 52.9 t ADT: 270

IA 48

Good

Over: COE CREEK

0.8 mi. W of Jct. SR H-14, Montgomery, IA

Built 1974 Load: 90.5 t ADT: 1,210

LOCAL

Good

Over: DRAINAGE

071381302, Montgomery, IA

Built 1990 Load: 99.9 t ADT: 15

LOCAL

Good

Over: NISHNABOTNA TRIB

073380204, Montgomery, IA

Built 1992 Load: 99.9 t ADT: 50

FM

Poor

Over: TARKIO CREEK

071370405, Montgomery, IA

Built 1949 Load: 9.7 t ADT: 159

LOCAL

Poor

Over: SMALL STREAM

073362601, Montgomery, IA

Built 1985 Load: 9.8 t ADT: 5

LOCAL

Poor

Over: NODAWAY RIVER

072362904, Montgomery, IA

Built 1968 Load: 11.1 t ADT: 20

LOCAL

Poor

Over: MINOR DRAINAGE

073391802, Montgomery, IA

Built 1966 Load: 11.3 t ADT: 5

LOCAL

Poor

Over: TARKIO CREEK

071372003, Montgomery, IA

Built 1949 Load: 13.5 t ADT: 60

LOCAL ROAD

Poor

Over: LOCAL STREAM

071383202, Montgomery, IA

Built 1985 Load: 14.1 t ADT: 20

LOCAL RD

Poor

Over: BRANCH TARKIO CREEK

073372604, Montgomery, IA

Built 1959 Load: 15.9 t ADT: 15

LOCAL

Poor

Over: DRAINAGE

073371904, Montgomery, IA

Built 1987 Load: 16.7 t ADT: 5

LOCAL RD

Poor

Over: M NODAWAY RIVER

071361405, Montgomery, IA

Built 1952 Load: 18.3 t ADT: 100

FM

Poor

Over: WALNUT CREEK

073380901, Montgomery, IA

Built 1956 Load: 19.6 t ADT: 528

FM

Poor

Over: NISHNABOTNA TRIB

071383103, Montgomery, IA

Built 1957 Load: 21.0 t ADT: 173

LOCAL

Poor

Over: NISHNABOTNA TRIB

073381501, Montgomery, IA

Built 1970 Load: 21.2 t ADT: 5

FM

Poor

Over: LITTLE TARKIO

071383501, Montgomery, IA

Built 1958 Load: 24.3 t ADT: 219

FM

Poor

Over: CRABAPPLE CREEK

073393501, Montgomery, IA

Built 1958 Load: 24.3 t ADT: 199

FM

Poor

Over: WALNUT CREEK TRIB

071392104, Montgomery, IA

Built 1965 Load: 24.5 t ADT: 153

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