This might explain why the work plan for this year included "various concepts related to tailings and tailings storage."

New regulations from BC after the Mt. Polley spill.

Companies planning to build new mines in B.C. will need to consider alternatives to wet tailings ponds, under new regulations prompted by last year’s failure of the Mount Polley tailings pond.

Should a company decide a wet tailings pond is most appropriate, it will have to demonstrate why it is the preferred option. It will need to conduct technical and economic evaluations of all the options considered.

Letters have gone out to companies for the following projects advising them they will need to meet the new requirements: Spanish Mountain (gold), Ajax (copper-gold), Blackwater (gold), Harper Creek (copper-gold), Kemess (copper-gold), Schaft Creek (copper-gold-molybdenum), Sukunka (coal).

--http://www.biv.com/article/2015/3/new-mines-must-consider-tailings-pond-alternatives/