Just After Spring Break Sr. Design

1. Just After Spring BreakSr. Design

2. Coal Group • For Each of Your Coal Seams Define the Boundary of the areas you believe are minable • Provide a plan view map showing these areas • An area may be unminable because • It poses ground control challenges you cannot meet • The coal is missing or too thin to mine • Other logical reasons why you don’t want to go in there

3. Complete Mine Timing Maps • Get mine timing maps for all coal seams • Prepare drawings – may be electronic or lines drawn on Carlson timing maps showing where you will mine each year • This will likely be over 30 separate drawings for each seam • The maps will show how long the total mine life is and should include all lands that will be part of your minimum 30 year mine life plan

4. Explain your protocols • We know you will have 10,000 GPM of pump capacity • How will that be distributed between coal seams or will you have drainage holes to bring all water down to the #2 coal seam? • How much emergency pumping capacity will you have? • When you talk about “on trucks” does that mean the pumps will be in the warehouse and you’ll load them when they are needed or will they be kept on trucks ready to go at a moments notice? What type of mine equipment do you mean when you say “truck”?

5. More Protocols • Your mine maps seem weak in tracing long linear features such as stream channels and possibly faults • If you mine into something unexpected what do you want your crews to do? • If they reach a fault and the coal suddenly vanishes – what happens? • If they start mining into obviously oxidized baked coal such as might be found near a dike what should they do • If they are mining and they encounter channel sandstone roof what should they do? • If the sandstone does not bleed water do you want them to keep mining? • If the coal seam pinches down to your minimum mining thickness do you want them to stop? • If they hit roof that starts bleeding water do you want them to stop immediately, even if only limited water is involved?

6. Crossings • Right now you know you have a fault • How and where will you cross it? • How is this influencing your mine panel geometry and timing? • Right now your block model says there are no stream channels that completely cut your coal deposit in two. • If this is correct you can always mine around the channels. • If this is false you may be forced to cross a stream channel somehow. • How will you cross if you have to? • Where and how will you try to go around channels if you can? • If you run into a stream channel someplace where it is not suppose to be, how will you decide where to go around it or through it?

7. Copper Miners • Continue working with VALP to get the best grade and production schedule • This will involve trouble shooting work that may or may not produce results at the end of the week. • Produce mine maps with benches and roads for each of your pit shells • Bear in mind that each pit expansion will have an existing road network that you will have to use for expanding to the next shell • Make sure your road network history is realistic • Are your roads used for both ore and waste? • Will you have multiple routes out of the pit.

8. Needed Trick • Zero Expansion is used to allow you to split a road.

9. Aggregate • Run Agflow and see what products you produce including waste. • Compare those products to the list that you have • Adjust until you are producing what you are suppose to. • Note that currently you have aggregate markets that are not very size specific and may tighten in the future. • Get your grinding circuit to make scrubber lime worked out.

10. More Work • Develop mine maps for roughly every 5 years throughout the life of your mine property • The maps should show roads, benches, and waste piles