Iowa Highway 3
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| Basic data | |
| Overall length: | 328 miles / 528 kilometers |
| Starting point: |
 SD 50 in Westfield
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| End point: |
 US 52 US 61 US 151 in Dubuque 
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The Iowa Highway 3 is a 328 Miles (= 528 kilometers ) long highway in the US state of Iowa , which runs from east to west.
The highway begins on South Dakota Highway 50 in Westfield on the border with South Dakota and ends on US Highway 52 , US Highway 61 and US Highway 151 in Dubuque .