"It will make a substantial dent in the supply of cannabis in the region," Mr Greville said.
He said police received a lot of information about drug dealing and growing from the Crimestoppers phone line, which provides an anonymous call-in line for people wanting to pass on information without being identified.
"We have received a lot of information that has helped us immensely in locating and prosecuting several drug dealers in the region," Mr Greville said. "This information is invaluable to police and we would encourage people to use it if they know something about drug dealing in their area."
Police would continue to put pressure on cannabis growers.
"Police work and investigation into cannabis crime is ongoing and continues year round - we are constantly monitoring the activities of drug dealers who should in no way feel as if the pressure is off them now."
The public are being encouraged to pass on any information to police about drug dealing, including reports of suspicious behaviour on a property or activity that is out of the ordinary, especially in the bush or on farmland.
Throughout the cannabis operation police received good feedback from rural communities.
Many people made it clear they were grateful for the work police were doing.
-Information about cannabis dealing and activity can be left anonymously and in confidence by phoning Crimestoppers on 0800 555 111.
