| Feature Name: | Sourdough Island
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| Feature Type: | island
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| State: | Montana
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| County: | Missoula
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| County Population: | 95802
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| County Housing Units: | 41319
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| County Size: | 2597.97 Square Miles
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| Latitude: | 47.10417
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| Longitude: | -113.41
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| Map Cell Name: | Salmon Lake
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| Geographic Keywords: | Sourdough
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