The Saskatchewan Water Security Agency has given an update on the $4-billion Lake Diefenbaker Irrigation Expansion Project.

Patrick Boyle with the Water Agency says the pre-planning design stage is underway right now for the project.

He says phase one would add 80,000 acres with a canal to the village of Conquest.

Phase two reaches near Rosetown, adding 260,000 acres, with phase one and two costing about $2-billion.

Phase 3, he says, builds a canal from Lake Diefenbaker to Buffalo Pound Lake to add 120 thousand acres to irrigation.

The ten year project is estimated to cost $4-billion.