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The Shade Tree Day Habilitation is located on Main Street in Riverhead. The program serves 30 consumers and is supervised by seven staff members.  Participants in this program are actively involved in the Riverhead Community enjoying the various parks, civic centers, historical sites, and bowling.

In 2006 IGHL experienced a major change as it relocated its main administration building and largest Day Habilitation program from its home of over 25 years in East Moriches to a brand-new, specialty facility in Manorville, New York.