DMC Mining has signed a five-year contract worth $400m to develop two mine shafts at BHP Billiton’s Jansen Potash project in Saskatchewan, Canada.

DMC president and CEO William Shaver said the company will use the most advanced shaft sinking techniques and technology to support construction of the first greenfield potash mine built in Saskatchewan.

“We believe that the combination of BHP Billiton and DMC brings a formidable team with both companies aspiring to complete the project with zero harm to our employees, the environment and the host communities,” Shaver said.

Jansen is an underground potash mine located approximately 140km east of Saskatoon, Saskatchewan, and is the most advanced project of BHP Billiton’s multiple development options in potash.