Wrangell Sentinel -

A regional conservation group recently called attention to the prospective sale of a disused Canadian mine, and suggests the exchange could bode poorly for efforts to maintain water quality in transboundary rivers.

The Tulsequah Chief zinc mine is across the Canadian border in British Columbia located along the Tulsequah River, a tributary of the Taku River. It has been out of use since 1957, and its critics contend it has since been a source of headache both for its past owners and for subsistence users along the Taku watershed it neighbors.

Constructed and initially operated for five year...