| Feature Name: | Interchange Twenty-one
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| Feature Type: | crossing
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| State: | Connecticut
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| County: | Middlesex
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| County Population: | 155071
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| County Housing Units: | 67285
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| County Size: | 369.26 Square Miles
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| Latitude: | 41.60806
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| Longitude: | -72.70278
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| Elevation: | 107
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| Map Cell Name: | Middletown
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| Geographic Keywords: | Interchange
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