Sammamish Review, 24 Nov 2012 – Insert Cheech and Chong reference here. Barring action from the federal government, Sammamish residents 21 years and older will legally be able to possess up to an ounce of marijuana Dec. 6. But that date will prove to be a little too late for at least four people who were charged with possession of marijuana in the city in recent months. Though prosecutors in King County have dropped 175 pending cases of adult marijuana possession that would be legal would be legal under the initiative, Sammamish will not be doing the same with its cases.