Story County, IA

262 public highway bridges

Story County Bridge Snapshot

Story County, Iowa contains 262 public highway bridges in the FHWA National Bridge Inventory. Roughly 29.8% are rated “Good,” 45.8% “Fair,” 14.5% “Poor,” and 14.5% 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.

262

Total Bridges

29.8%

Good

14.5%

Poor

14.5%

Structurally Deficient

Condition Distribution

Good

29.8% (78)

Fair

45.8% (120)

Poor

14.5% (38)

SD

14.5% (38)

All Bridges (262)

Sort:

S27/650TH AVE

Over: CALAMUS CREEK

082223404, Story, IA

Built 1962 Load: 26.7 t ADT: 540

610TH AVE

Over: BEAR CREEK

085230102, Story, IA

Built 1975 Load: 26.9 t ADT: 40

E 13TH ST

Over: SKUNK RIVER

083240103, Story, IA

Built 1968 Load: 27.2 t ADT: 13,164

710TH AVE

Over: HARDIN-STORY DD I

085210304, Story, IA

Built 1947 Load: 27.2 t ADT: 60

E41/LINCOLN HWY

Over: E BR INDIAN CR & RR

083221005, Story, IA

Built 1973 Load: 27.8 t ADT: 1,048

670TH AVE

Over: HICKORY GROVE LK OUTLET

083222402, Story, IA

Built 1965 Load: 27.8 t ADT: 110

620TH AVE/S14

Over: GRANT OPEN DITCH EXT 5

083223102, Story, IA

Built 1977 Load: 27.8 t ADT: 988

E63/730TH AVE

Over: WILLOW CREEK

082211302, Story, IA

Built 1972 Load: 27.8 t ADT: 131

650TH AVE

Over: RUPPLE CREEK

082221014, Story, IA

Built 1971 Load: 28.1 t ADT: 1,228

170TH ST

Over: SKUNK RIVER

084230703, Story, IA

Built 1939 Load: 28.1 t ADT: 139

R38/500TH AVE

Over: ONION CREEK

084243002, Story, IA

Built 1970 Load: 28.1 t ADT: 2,404

SB I-35

Over: BEAR CREEK

3.3 MILES S OF JCT SR E18, Story, IA

Built 1967 Load: 28.8 t ADT: 15,250

150TH ST

Over: BEAR CREEK

085233205, Story, IA

Built 1985 Load: 28.8 t ADT: 50

NB I-35

Over: BEAR CREEK

3.3 MILES SOUTH OF SR E18, Story, IA

Built 1967 Load: 29.2 t ADT: 15,250

190TH ST/E29

Over: DYE CREEK

084212001, Story, IA

Built 1973 Load: 29.4 t ADT: 669

650TH AVE

Over: EAST BR INDIAN CREEK

083223404, Story, IA

Built 1976 Load: 30.2 t ADT: 1,228

IA 210

Over: CALAMUS CREEK

0.9 MILE W OF JCT SR S27, Story, IA

Built 1954 Load: 31.5 t ADT: 1,920

SB I-35

Over: LONG DICK CREEK

0.5 MILES N OF SR E18, Story, IA

Built 1967 Load: 32.2 t ADT: 14,850

6TH ST

Over: WEST INDIAN CREEK

000000000, Story, IA

Built 1964 Load: 32.7 t ADT: 1,850

I-35

Over: BALLARD CREEK

1.9 MILES N OF JCT IA 210, Story, IA

Built 1964 Load: 32.7 t ADT: 46,600

I-35

Over: WALNUT CREEK

4.2 MILES N OF JCT IA 210, Story, IA

Built 1964 Load: 32.7 t ADT: 46,600

R38/500TH AVE

Over: IOWAY CREEK

084240702, Story, IA

Built 1976 Load: 33.2 t ADT: 1,496

310TH ST

Over: ROCK CREEK

082222301, Story, IA

Built 1988 Load: 33.7 t ADT: 40

180TH ST/E29

Over: RICHLAND 81 OPEN DITCH

084222201, Story, IA

Built 2009 Load: 33.7 t ADT: 1,028

170TH ST

Over: SMALL

084240701, Story, IA

Built 2006 Load: 33.9 t ADT: 1,137

MINNESOTA AVE

Over: OVER UPRR

A66600500, Story, IA

Built 1980 Load: 34.7 t ADT: 488

670TH AVE

Over: EAST INDIAN CREEK

084221202, Story, IA

Built 1915 Load: 35.1 t ADT: 26

690TH AVE

Over: DYE CREEK

083210502, Story, IA

Built 1998 Load: 35.5 t ADT: 45

WB US 30

Over: OVER UP RR

0.1 MILE W OF JCT SR S14, Story, IA

Built 1963 Load: 35.6 t ADT: 7,900

SB I-35

Over: OVER UP RR

1.4 MI. N OF JCT. US 30, Story, IA

Built 1966 Load: 35.9 t ADT: 18,000

WEST T AVE

Over: WEST BR INDIAN CREEK

083230103, Story, IA

Built 1997 Load: 36.2 t ADT: 139

640TH AVE

Over: EAST BR INDIAN CREEK

1.3 miles S of E18, Story, IA

Built 2015 Load: 36.3 t ADT: 15

R70/580TH AVE

Over: SKUNK RIVER

082230904, Story, IA

Built 1989 Load: 36.6 t ADT: 818

ARRASMITH TRL

Over: D D

084242308, Story, IA

Built 1996 Load: 37.5 t ADT: 319

E26/C.S. RD

Over: IOWAY CREEK

084242005, Story, IA

Built 1982 Load: 38.5 t ADT: 3,640

NB I-35

Over: OVER UP RR

1.5 MILES N OF JCT US 30, Story, IA

Built 1966 Load: 38.8 t ADT: 18,000

E41 LINCOLN HWY

Over: DYE CREEK

083210701, Story, IA

Built 2001 Load: 39.8 t ADT: 1,048

200TH ST

Over: DD 81

084222603, Story, IA

Built 2000 Load: 41.5 t ADT: 40

R 38/510TH AVE

Over: WALNUT CREEK

083242902, Story, IA

Built 2010 Load: 41.6 t ADT: 4,647

E18/130TH ST

Over: MIDDLE MINERVA CREEK

085211901, Story, IA

Built 1973 Load: 42.9 t ADT: 638

NB I-35

Over: LONG DICK CREEK

0.5 MILES N OF SR E18, Story, IA

Built 1967 Load: 43.1 t ADT: 14,850

W RIVERSIDE RD

Over: SKUNK RIVER

084242207, Story, IA

Built 1989 Load: 43.7 t ADT: 3,301

LINCOLN WAY

Over: OVER UP RR

000000000, Story, IA

Built 1984 Load: 46.0 t ADT: 5,356

W 4TH ST

Over: WEST BR INDIAN CREEK

000000000, Story, IA

Built 1998 Load: 52.3 t ADT: 1,119

R38 500TH AVE

Over: CLEAR CREEK

084243106, Story, IA

Built 1969 Load: 59.2 t ADT: 2,712

R70/580TH AVE

Over: SMALL STREAM

083233302, Story, IA

Built 1987 Load: 99.9 t ADT: 818

150TH ST

Over: KEIGLEY BRANCH

085243501, Story, IA

Built 1977 Load: 16.3 t ADT: 100

STANGE RD(ISU)

Over: IOWAY CREEK (STANGE)

0.1 MILE N OF SR 13TH ST, Story, IA

Built 1965 Load: 16.7 t ADT: 15,397

US 30

Over: RICHARDS CREEK

0.1 MILE EAST OF JCT I-35, Story, IA

Built 1963 Load: 18.1 t ADT: 14,000

DUNN STREET

Over: DRAINAGE DITCH #70

Dunn Street, Story, IA

Built 1969 Load: 18.1 t ADT: 170

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026