Dominion Diamond has unveiled an updated life-of-mine plan for each of the Ekati and Diavik diamond mines in Canada.
The plan includes current estimates for expected annual production by pipe, with associated operating costs and capital costs.
Dominion has an 80% interest in the Ekati diamond mine as well as a 58.8% interest in the surrounding areas.
The Ekati mine plan includes production from Fox, Misery, Pigeon and Lynx open pits, as well as the Koala and Koala North underground mines.
The Ekati operation will continue into 2020, even though the Koala North and Fox resources will be exhausted this year.
The 2014 plans call for the prodution of 1.22 million carats and the development and mining of the Lynx pipe that is currently an indicated resource.
The Ekati processing plant has the capacity to process about 4.35 million tonnes per year and the mine's operating costs are expected to reach about C$317m ($310m) this year.
Dominion has a 40% interest in the Diavik diamond mine along with partner Rio Tinto, which holds a 60% stake.
The Diavik mine has been in production since 2003 and, as of 31 December 2013, has produced about 84 million carats of diamonds from the processing of about 22 million tonnes of kimberlite.
The mine has three operating kimberlite ?pipes which include the A-154 South, A-154 North and A-418.
The updated mine plan for Diavik anticipates operating costs to decline to about C$408m ($400m) for the year ahead.
Dominion supplies rough diamonds to the global market through its sorting and selling operations in Canada, Belgium and India.
The company's current budget for marketing 100% of the Ekati goods and 40% of the Diavik goods is about $20m per year.