1. Henderson Mine Site

2. Henderson Mine

3. Central Campus Shaft Collar Elev 10,400 ft Shaft Bottom Elev 7,500 ft LA Ramp Primary Access Ramp 3600 ft Central Campus Elev. 6,750 ft (4200 mwe) Secondary Access Ramp 3200 ft Fresh air Exhaust air To crusher Harrison Mt. Elev. 12,300 ft UNO

4. Central Campus Elev. 6750 ft (4200 mwe) Midway Campus Elev. 5825 ft (5100 mwe) Lower Campus Elev. 4900 ft (6000 mwe) EarthLab/ Geoscience Area Deep Access Internal Shaft

5. Preliminary Cost Estimates (Excluding UNO)

6. Preliminary Time Schedule (Excluding UNO)

7. UNO Preliminary Cost Estimates

8. Equipment and Excavation Techniques

9. 2.3.1 Conventional Development Basic drilling cycle for drill and blast drifting and tunneling: Surveying and setup Drilling Charging Blasting Ventilation Scaling Mucking Scaling Bolting

10. 3 Boom Drill Jumbo

11. LHD

12. Development Haul Truck

13. Raise Drill Operating Cycle

14. Sandvik Tamrock Rock World, 2/2001 Drilling the ventilation raises at the Kiruna Mine, 1998

15. Shaft Widening by Drill and Blast

16. Shaft Boring Machine (Wirth) V-mole method Raise bored pilot hole 1.8 to 2.4 m diameter. Ream shaft to up to 8.5 m diameter. Limited by maximum length raise bored hole, currently 1,300 m. 7.5 m day average