1. October 2011

2. Elk Point Basin 2 WPX Milestone Project WPX Manitoba Project

3. Milestone Saskatchewan 3

4. Milestone Timeline 4 Present

5. Scoping Study Highlights 5 AMECs EPCM experience with five Potash Corp mines adds credibility to the CAPEX estimates for this project. (NPV 10 ) 5.22 Bn 1 CAD: IRR 27.3%* 1. CRU Projected prices ($511) Production rate of 2.5 Mt per year 40 year mine life Total CAPEX $2.51 billion CAD 8.5% Reduction of production costs due to the high formation temperatures

6. PFS Highlights Target Annual Production rate2.8 Mt/yr Life of Mine40 years Years of Construction3 Construction Start-up2013 Mining Start-up2016 Years to Full Secondary Production6 Long Term Potash Price (FOB Gate)$511/ tonne USD Assumed Exchange RateUS$/CAD$ 1.00 Taxes and Royalties$28.90/ tonne CAD Sustaining CAPEX Rate %2.0% Base Case100% Equity OPEX$62.35/ tonne CAD Initial CAPEX$2.458 Billion CAD Port CAPEX$300 Million CAD Total Initial CAPEX$2.758 Billion CAD NPV (10)$4.14 Billion CAD IRR22.7% Payback Period5 Years 6

7. Geothermal Gradients 7

8. Annual Earning Comparisons (Oct 25 th 2011, average prices) Milestone Potash ProjectGoldCopper Commodity Price$500/t$1,700/tr oz$3.42/lb Annual Production2.5 mt/year0.74 M oz365 M lbs Life of Mine40 years Recovered Grade30.5%2.79 g/t2.02 % Cu Mining Cost$60/t$204/Oz$0.41/lb 8 * Gate Price excludes shipping to market ( $360/T KCl f.o.b.Vancouver )