Speaking at North Wales Police HQ in Colwyn Bay, Karen Dixon, district Crown Prosecutor, said: "The CPS has been in close contact with North Wales Police as their investigation into Catherine Gowing's disappearance has developed.
"We can now confirm that, having carefully carried out a detailed review of the evidence gathered so far, we have concluded that there is sufficient evidence to charge Clive Sharpe with the murder of Catherine Gowing and it is in the public interest to do so."
Detective Superintendent John Hanson, who is leading the investigation for North Wales Police, renewed his appeal for witnesses. He said anyone who was in and around the area of the disused quarry at any time last weekend should come forward with any information they may have.
The last confirmed sighting of Ms Gowing was at an Asda supermarket in Queensferry last Friday evening and officers have been scouring CCTV as they establish her movements.
Appearing at a press conference on Thursday, Ms Gowing's sister Emma broke down in tears as she asked the public for help. She said: "We are desperate to hear any news of Catherine's whereabouts. Please look, please search, please help us find our beautiful sister."