Reserves & Resources

The expected mass recovery is 100%. The Mineral Resources are inclusive of the Mineral Reserves.

Mineable Reserve

Proven Reserve Probable Reserve Total Reserve
Tonnes (Mt) 68.11 709.17 777.28
K2O Grade (%) 10.34 9.72 9.78

(1) As of December 22, 2017.

(2) A cutoff grade of 8.5% K2O was used to report reserves.

(3) Overall strip ratio of 0.29 to 1.

(4) Waste contains inferred resources, which have the potential to be upgraded to higher category resources, and possibly reserves, after sufficient definition work has been completed.

(5) Based on 100% mining recovery.

Measured, Indicated and Inferred Mineral Resource Grade Tonnage Report

Tonnes (Mt) Average Grade (% K2O)
Total Measured 83 10.13
Total Indicated 1,389 9.23
Total Measured & Indicated 1,472 9.28
Total Inferred 1,850 8.60

Mineral resources are not mineral reserves and do not have demonstrated economic viability.

Effective Date of the mineral resource estimate is: March 31, 2014