Sioux County, IA

429 public highway bridges

Sioux County Bridge Snapshot

Sioux County, Iowa contains 429 public highway bridges in the FHWA National Bridge Inventory. Roughly 61.5% are rated “Good,” 34% “Fair,” 2.3% “Poor,” and 2.3% 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.

429

Total Bridges

61.5%

Good

2.3%

Poor

2.3%

Structurally Deficient

Condition Distribution

Good

61.5% (264)

Fair

34% (146)

Poor

2.3% (10)

All Bridges (429)

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Publisher	Kiznis Studio
Sources	FHWA National Bridge Inventory, public U.S. government datasets

Sioux County, IA

Sioux County Bridge Snapshot

Condition Distribution

All Bridges (429)

LOCAL

LOCAL

LOCAL

LOCAL

K42

470TH ST

LOCAL

LOCAL

LOCAL

MARSH AVE

LOCAL

GRANT AVE

350TH ST

HARRISON AVE

JEFFERSON AVE

DOVE AVE

KENNEDY AVE

360TH ST

K24 DOGWOOD AVE

LOCAL

FM

FM

FM

FM

FM

B46

LOCAL

GARFIELD AVE

LOCAL

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