Shelby County, IA

194 public highway bridges

Shelby County Bridge Snapshot

Shelby County, Iowa contains 194 public highway bridges in the FHWA National Bridge Inventory. Roughly 36.6% are rated “Good,” 53.6% “Fair,” 9.8% “Poor,” and 9.8% 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.

194
Total Bridges
36.6%
Good
9.8%
Poor
9.8%
Structurally Deficient

Condition Distribution

Good
36.6% (71)
Fair
53.6% (104)
Poor
9.8% (19)
SD
9.8% (19)

All Bridges (194)

FM

Good

Over: SILVER CREEK

079391501, Shelby, IA

Built 2005 Load: 38.1 t ADT: 120

LOCAL

Good

Over: MOSQUITO CREEK

079403105, Shelby, IA

Built 2000 Load: 38.5 t ADT: 41

REDWOOD AVE

Good

Over: DUTCH BRANCH

078381602, Shelby, IA

Built 2014 Load: 39.0 t ADT: 51

FM RD F32

Good

Over: LONG BRANCH

802137, Shelby, IA

Built 1999 Load: 39.0 t ADT: 29

LOCAL

Good

Over: MOSQUITO CREEK

079400305, Shelby, IA

Built 2004 Load: 39.2 t ADT: 51

LOCAL

Good

Over: W FORK W NISHNABOTNA RVR

081380701, Shelby, IA

Built 1992 Load: 39.3 t ADT: 45

FM

Good

Over: SILVER CREEK

802739, Shelby, IA

Built 2013 Load: 39.5 t ADT: 1,155

NORTH 7TH ST

Good

Over: SMALL STREAM

D81500610, Shelby, IA

Built 2021 Load: 39.9 t ADT: 114

LOCAL

Good

Over: LONG BRANCH

802837, Shelby, IA

Built 2013 Load: 40.2 t ADT: 41

F16

Good

Over: MILL CREEK

ON F-16 NORTH OF DOGWOOD, Shelby, IA

Built 2017 Load: 40.5 t ADT: 79

LINDEN RD

Good

Over: SMALL STREAM

079380702, Shelby, IA

Built 2014 Load: 40.8 t ADT: 767

FM

Good

Over: W FK W NISHNABOTNA RIVER

079380803, Shelby, IA

Built 1996 Load: 41.0 t ADT: 309

FM

Good

Over: E BR W NISHNABOTNA RIVER

078380506, Shelby, IA

Built 1998 Load: 41.5 t ADT: 29

NISHNA AVE

Good

Over: SMALL STREAM

079380103, Shelby, IA

Built 2015 Load: 42.3 t ADT: 40

FIR RD

Good

Over: MOSQUITO CREEK

080401202, Shelby, IA

Built 2016 Load: 42.4 t ADT: 50

1400TH ST

Good

Over: W NISHNABOTNA RIVER

1400th St W of Orange Rd, Shelby, IA

Built 2015 Load: 43.7 t ADT: 82

FM RD F32

Good

Over: E BRANCH W. NISH. RIVER

802337, Shelby, IA

Built 2001 Load: 44.7 t ADT: 29

2200TH ST

Good

Over: ELK CREEK

081371901, Shelby, IA

Built 2016 Load: 45.0 t ADT: 62

1800TH ST

Good

Over: W FORK W NISHNABOTNA

80838, Shelby, IA

Built 2017 Load: 45.7 t ADT: 26

LOCAL

Good

Over: INDIAN CREEK

078373201, Shelby, IA

Built 2011 Load: 47.6 t ADT: 30

LINDEN RD

Good

Over: SNAKE CREEK

081392508, Shelby, IA

Built 2021 Load: 48.3 t ADT: 300

LINDEN RD

Good

Over: SMALL STREAM

079383002, Shelby, IA

Built 2018 Load: 49.2 t ADT: 390

IA 173

Good

Over: ELKHORN CREEK

1.1 mi. N of Jct. SR F-58, Shelby, IA

Built 2003 Load: 51.2 t ADT: 1,500

IA 44

Good

Over: ELM CREEK

0.2 mi. E of Jct. SR M47, Shelby, IA

Built 1988 Load: 64.5 t ADT: 1,490

FM RD F32

Good

Over: LYONS CREEK

080381904, Shelby, IA

Built 2002 Load: 69.0 t ADT: 608

LOCAL

Poor

Over: KEG CREEK

078400606, Shelby, IA

Built 1924 Load: 7.8 t ADT: 20

LOCAL

Poor

Over: MOSQUITO CREEK

080403505, Shelby, IA

Built 1930 Load: 8.4 t ADT: 26

LOCAL

Poor

Over: MOSQUITO CREEK

079402903, Shelby, IA

Built 1917 Load: 11.8 t ADT: 35

LOCAL

Poor

Over: SMALL STREAM

079382701, Shelby, IA

Built 1950 Load: 12.6 t ADT: 11

LOCAL

Poor

Over: SMALL STREAM

079390801, Shelby, IA

Built 1968 Load: 13.5 t ADT: 5

LOCAL

Poor

Over: SMALL STREAM

801340, Shelby, IA

Built 1960 Load: 18.1 t ADT: 30

LOCAL

Poor

Over: SMALL STREAM

078371001, Shelby, IA

Built 1976 Load: 21.4 t ADT: 15

FIELD ENTRANCE

Poor

Over: SMALL STREAM

078373201, Shelby, IA

Built 1942 Load: 21.6 t ADT: 10

LOCAL

Poor

Over: LONG BRANCH

801637, Shelby, IA

Built 1940 Load: 21.7 t ADT: 51

LOCAL

Poor

Over: PIGEON CREEK

803140, Shelby, IA

Built 1947 Load: 21.8 t

FM

Poor

Over: SILVER CREEK

078401103, Shelby, IA

Built 1960 Load: 22.4 t ADT: 131

FM

Poor

Over: SMALL STREAM

078370701, Shelby, IA

Built 1960 Load: 23.7 t ADT: 240

LOCAL

Poor

Over: SMALL STREAM

803037, Shelby, IA

Built 1959 Load: 32.3 t ADT: 35

LOCAL

Structurally Deficient

Over: INDIAN CREEK

079373504, Shelby, IA

Built 1926 ADT: 35

LOCAL

Structurally Deficient

Over: KEG CREEK

079401303, Shelby, IA

Built 1966 ADT: 11

LOCAL

Structurally Deficient

Over: E BRANCH W. NISH. RIVER

801337, Shelby, IA

Built 1920 Load: 4.5 t ADT: 26

LOCAL

Structurally Deficient

Over: ELKHORN CREEK

078371603, Shelby, IA

Built 1958 Load: 7.1 t ADT: 21

LOCAL

Structurally Deficient

Over: KEG CREEK

079403503, Shelby, IA

Built 1969 Load: 7.2 t ADT: 11

LOCAL

Structurally Deficient

Over: W. NISHNABOTNA

080381001, Shelby, IA

Built 1926 Load: 12.7 t ADT: 21

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