Gardaí arrested one man during the planned operation.
The drugs were discovered by Gardaí when they intercepted and stopped a car travelling on the M9 motorway near Knocktopher late last night.
The driver of the car, a man in his 40s was arrested and is currently detained under Section 2 of the Criminal Justice Drug Trafficking Act, 1996 at Thomastown Garda Station. He can be held for up to seven days.
Gardaí were targeting the sale and supply of drugs in south Tipperary and Kilkenny.
The operation was conducted by Gardaí from the Tipperary Divisional Drugs Unit and members of the Armed Support Unit.