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:

WB US 30

Over: UNIVERISTY BLVD

1.5 MILES W OF JCT US 69, Story, IA

Built 1971 ADT: 3,700

EB US 30

Over: US 69 & BIKE PATH

AT JCT. OF US 69, Story, IA

Built 1963 ADT: 12,400

WB US 30

Over: US 69

AT US 69 JUNCTION, Story, IA

Built 1963 ADT: 12,400

US 65

Over: US 30

AT JUNCTION WITH US 30, Story, IA

Built 1963 ADT: 5,800

MAIN ST

Over: US 69 (GRAND AVE.)

0.1 MILE N OF LINCOLN WAY, Story, IA

Built 1938 ADT: 15,900

IA 210

Over: I-35

AT JCT. I-35, Story, IA

Built 1964 ADT: 42,000

SR E-18

Over: I-35

AT JCT I-35 AND SR E18, Story, IA

Built 1967 ADT: 27,500

290TH ST

Over: I-35

4.0 MILES N OF JCT IA 210, Story, IA

Built 1964 ADT: 45,800

E57 260TH ST

Over: I 35

2.0 MILES S OF JCT 30/35, Story, IA

Built 2017 ADT: 45,800

I 35 NB

Over: US 30

AT JUNCTION WITH US 30, Story, IA

Built 1964 ADT: 7,050

I 35 SB

Over: US 30

AT JUNCTION WITH US 30, Story, IA

Built 1964 ADT: 6,750

I-35 NB

Over: 13TH ST

1.8 MILES N OF JCT US 30, Story, IA

Built 1966 ADT: 3,950

I 35 SB

Over: 13TH ST

1.9 MILES N OF JCT US 30, Story, IA

Built 1966 ADT: 3,950

E29 190TH ST

Over: I-35

4.9 MILES N OF JCT. US 30, Story, IA

Built 1966 ADT: 29,500

E23 170TH ST

Over: I-35

2.1 MILES NORTH OF SR E29, Story, IA

Built 1967 ADT: 30,400

150TH ST

Over: I-35

2.1 MILES SOUTH OF SR E18, Story, IA

Built 1967 ADT: 30,400

E15 115TH ST

Over: I-35

AT JUNCTION SR E15, Story, IA

Built 1965 ADT: 25,600

LINCOLN WAY

Over: I-35

1.0 MI NORTH OF JCT US 30, Story, IA

Built 1966 ADT: 33,500

LINCOLN HWY

Over: US 65

1.0 MILE N OF JCT US 30, Story, IA

Built 1938 ADT: 1,640

SR R38

Over: US 30

AT JUNCTION SR R38 NB, Story, IA

Built 1971 ADT: 6,700

S DAKOTA R38 SB

Over: US 30

AT JUNCTION SR R38, Story, IA

Built 2001 ADT: 6,700

500TH AVE

Over: US 30

1.1 MI. W of SR. R-38, Story, IA

Built 1971 ADT: 15,300

S DAYTON AVE

Over: US 30

0.8 MILE WEST OF I-35, Story, IA

Built 1994 ADT: 25,600

19TH ST

Over: US 30

1.5 MILES W OF JCT SR S27, Story, IA

Built 1995 ADT: 7,900

11TH ST

Over: US 30

0.9 MILE E OF JCT SR S14, Story, IA

Built 1995 ADT: 12,100

I 35 FLY OVER RAMP

Over: I 35 & US 30

I-35 TO US 30 INTERCHANGE, Story, IA

Built 2019 ADT: 29,100

FIELD ENTRANCE

Over: ROAD DITCH

082232703, Story, IA

Built 1957 Load: 8.2 t ADT: 10

213TH ST

Over: EAST BR INDIAN CREEK

084223603, Story, IA

Built 1925 Load: 10.0 t ADT: 26

640TH AVE

Over: WEST BR INDIAN CREEK

082220904, Story, IA

Built 1919 Load: 10.9 t ADT: 45

320TH ST

Over: SKUNK RIVER

082232703, Story, IA

Built 1949 Load: 11.8 t ADT: 80

100TH ST

Over: LONG DICK CREEK

085230301, Story, IA

Built 1956 Load: 11.8 t ADT: 45

710TH AVE

Over: DRAINAGE

083213402, Story, IA

Built 1959 Load: 12.7 t ADT: 11

270TH ST

Over: GRANT 5 OPEN DITCH

083233601, Story, IA

Built 1944 Load: 12.7 t ADT: 40

180TH ST

Over: EAST BR INDIAN CREEK

084221301, Story, IA

Built 1955 Load: 12.7 t ADT: 40

610TH AVE

Over: WEST BR INDIAN CREEK

084232402, Story, IA

Built 1911 Load: 12.7 t ADT: 34

170TH ST

Over: LITTLE MINERVA CREEK

084211101, Story, IA

Built 1958 Load: 13.6 t ADT: 11

567TH AVE

Over: LONG DICK CREEK

085231806, Story, IA

Built 1911 Load: 13.6 t ADT: 80

550TH AVE

Over: KEIGLEY BRANCH

085243602, Story, IA

Built 1913 Load: 13.6 t ADT: 80

730TH AVE

Over: MARSHALL-STORY DD#2

082210102, Story, IA

Built 1944 Load: 14.5 t ADT: 30

140TH ST

Over: HAMILTON-STORY 1 OPEN DD

085242601, Story, IA

Built 1935 Load: 14.5 t ADT: 20

720TH AVE

Over: WILLOW CREEK

082210202, Story, IA

Built 1945 Load: 15.1 t ADT: 15

730TH AVE

Over: CLEAR CREEK

083212402, Story, IA

Built 1931 Load: 15.4 t ADT: 40

310TH ST

Over: BALLARD CREEK

082242001, Story, IA

Built 1970 Load: 15.9 t ADT: 50

300TH ST

Over: SMALL STREAM

082241303, Story, IA

Built 1963 Load: 16.3 t ADT: 100

630TH AVE

Over: EAST BR INDIAN CREEK

085222002, Story, IA

Built 1924 Load: 16.3 t ADT: 26

120TH ST

Over: KEIGLEY BRANCH

085241601, Story, IA

Built 1968 Load: 16.3 t ADT: 50

US 30 WB TO I35 NB

Over: DRAINAGE DITCH

AT JUNCTION US 30, Story, IA

Built 1964 Load: 16.7 t ADT: 1,780

630TH AVE

Over: CALAMUS CREEK

082222002, Story, IA

Built 1972 Load: 17.0 t ADT: 15

110TH ST

Over: KEIGLEY BRANCH

085240801, Story, IA

Built 1978 Load: 17.1 t ADT: 170

720TH AVE

Over: MIDDLE MINERVA CREEK

085212302, Story, IA

Built 1930 Load: 17.2 t ADT: 11

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