(O'Brien, OR)  --  Police have raided a major illegal marijuana growing operation near the Oregon-California border.  The property is located near the town of O'Brien, west of Medford.  More than 35-hundred marijuana plants were found in five large greenhouses.  The plants were destroyed.  The property owner also faces multiple code violations for illegal structures, unpermitted water tanks, illegal use of water in a creek, and unpermitted electrical work.  The property owner could face a year long closure of the property and possible civil forfeiture.  The investigation continues.