The suspension of mining operations, which follows completion of comprehensive review of present economics and operations at the mine. The company will restart of operations after the completion of critical milestones during the suspension period.

The company identified a number of deficiencies across the site by conducting comprehensive economic and operational review.

Over the past year, the deficiencies have resulted in a significant decline in the performance at Nyrstar Myra Falls mine.

However, Nyrstar said it has identified temporary suspension as the most effective way to enable appropriate resources to be focused on improvements at the site, in readiness for a restart.

Nyrstar Mining North America acting vice-president Glenn Smith said: "Deficiencies in site infrastructure, planning, operating, maintenance practices, inadequate mine development for future mining areas were all identified as topics that needed to be addressed.

"These factors have forced us into a period during which strategic programs and investments need to be assessed, and then implemented."

"These include such activities as restoration and upgrading of site power infrastructure, and execution of a focused mine development plan within the mine’s existing footprint."

Nyrstar said that restarting operations at the mine is based on the completion of various critical milestones during the suspension period.