1. Capstone Workshop Henderson DUSEL Conceptual Design Mark Kuchta Mining Engineering Department Colorado School of Mines Lee Petersen, CNA Consulting Engineers Greg Hulne, Miller Dunwiddie Architects Dale Holland, Dunham Associates John Jenkins, ILF Craig Covil, ARUP

2. Capstone Workshop 2 Engineering Design Team Colorado School of Mines: Mark Kuchta, Scott Kieffer, (Mining Engineering, Geotechnical Engineering) Henderson Mine: Chip deWolfe, + Staff (Mining Engineering, Safety) CNA Consulting Engineers: Lee Petersen (Engineering Team Leader, Civil Engineering) Dunham Associates: Dale Holland (Mechanical/Electrical Engineering) Miller Dunwiddie Architecture: Greg Hulne (Architect) ILF Consultants: John Jenkins (Internal Shaft Design) ARUP: (Cost review, construction management plan)

3. Capstone Workshop 3 Conceptual Design Overview Shared Mine Infrastructure Mine Services Summary Rock Conditions DUSEL Access Ramps Campus Layouts (Upper, Central, Lower, Outposts) Development Sequence System Design Fire and Life Safety Concepts and Code Review Surface Facilities

4. Capstone Workshop 4 Shared Mine Infrastructure Overriding design criteria Safety Share infrastructure that is of benefit to share Keep the DUSEL and mine operations as separate as possible

5. Capstone Workshop 5 Site Overview

6. Capstone Workshop 6 Shared Mine Infrastructure Ventilation 150,000 cfm available for DUSEL Electricity 14 MW with 14MW backup available for DUSEL. Mine Dewatering About 3000 gpm pumping capacity available for DUSEL DUSEL estimated need 500 gpm URAD Water Treatment About 2000 gpm in excess capacity available for DUSEL

7. Capstone Workshop 7 Shaft Schedule: Man Cage Double Deck Man Cage Capacity 100 people Overall availability about 93.5% Normally available 24/7 Service Cage Capacity 100 People 30 Ton capacity Sling 50 tons with crosshead Cage – 23 ft. long X 8.5 ft Wide X 13 ft high Can move DUSEL supplies at 1140 tons/week to 7500 tons/week depending on shift schedule used. (SNOLab: 336 tons/week)

8. Capstone Workshop 8 Rock Handling System 80 ton trucks dump rock at crusher. Gyratory crusher reduces to –4 in. 1 mile PC1 and 10.5 mile long PC2 underground conveyors. 4 mile long PC3 surface conveyor to mill site. 40,000 tons per day capacity Mine currently producing about 30,000 tons per day Maximum planned DUSEL production 3,000 tons per day DUSEL rock will be dumped at the crusher on the 7065 level, A fee ($/ton) will be charged for rock removal

9. Capstone Workshop 9 Henderson DUSEL Layout Central Campus Elev. 6800 ft, (4300 mwe) Midway Campus Elev. 5850 ft, (5100 mwe) Lower Campus Elev. 4900 ft. (5800 mwe) Internal Shaft Access Ramps EarthLab/ Geoscience Area Silver Plume Granite Silver Plume Granite Urad Porphyry 7065 Level 7500 Level Shaft Red Mountain Porphyry Henderson Granite Primos Porphyry Henderson Orebody Harrison Mountain Elev. 12,300 ft Red Mountain Elev. 12,300 ft 1 st Drill Hole 2 nd Drill Hole

10. Capstone Workshop 10 RQD DUSEL Exploration Hole 001 Section Plan RQD 90-100 75-90 50-75 25-50 < 25 Average RQD = 92 (Very Good) Three < 10 ft fracture zones

11. Capstone Workshop 11 LA Ramp Primary Access Ramp Central Campus Elev. 6,800 ft (4300 mwe) Secondary Access Ramp PC2 Conveyor to Mill Site 7065 Level Crusher 7500 shaft station DC1 Ramp 7625 shaft station PC1 Conveyor Dedicated Exhaust Drift Exhaust air Fresh air Henderson DUSEL Central Campus Access

12. Capstone Workshop 12 Access Ramps Central Campus Elev. 6800 ft Midway Campus Elev. 5850 ft Lower Campus Elev. 4900 ft EarthLab/ Geoscience Area 7500 Level 7065 Level Internal Shaft 2 nd Drill Hole 1 st Drill Hole Secondary Access Ramp Primary Access Ramp

13. Capstone Workshop 13 Ramps Central Campus Elev. 6800 ft Primary Access Ramp (to main shaft) Ramp to Midway Campus Secondary Access Ramp (to crusher) Internal Shaft Exhaust Drift

14. Capstone Workshop 14 Internal Shaft (winze) – Top at Central Campus 20 ft diameter Concrete lined Capacity 5 ton Capacity 20 people Sink top down Keep sinking bucket for hoisting Lower Campus excavation rock

15. Capstone Workshop 15 Shaft Cross Section

16. Capstone Workshop 16 Access Ramp Cross Sections Muck HaulageShipping Container

17. Capstone Workshop 17 Upper Campus Layout 8100 Shop (2500 mwe) 7500 Level (3300 mwe) #2 Shaft Ventilation Shaft Mining Area PC2 Conveyor to Mill Site

18. Capstone Workshop 18 Upper Campus Layout

19. Capstone Workshop 19 Central & Lower Campus Isometric

20. Capstone Workshop 20 Central & Lower Campus Building Blocks

21. Capstone Workshop 21 Central Campus Layout

22. Capstone Workshop 22 Central Campus Layout w/ Large Multi-Purpose Detector

23. Capstone Workshop 23 Lower Campus

24. Capstone Workshop 24 Infrastructure Design Life Criteria Suggested initial design life (capacity only) Lab life—50? years Drift cross section—sized for full expansion Duct size—20 years Power conductors—20 years Power transformers—10 years Chiller piping—20 years Chiller plant—10 years Communications—10 years

25. Capstone Workshop 25 Lab vs. Infrastructure Development Plan

26. Capstone Workshop 26 Development Sequence

27. Capstone Workshop 27 Fire & Life Safety Concept

28. Capstone Workshop 28 Lower Campus FLS Provisions

29. Capstone Workshop 29 Lower Campus FLS Provisions

30. Capstone Workshop 30 Fire & Life Safety Next Steps Meeting with MSHA and OSHA Regional offices on March 30, 2006 Meeting with Clear Creek County building code officials on March 31, 2006 Objective—MOU defining jurisdictions, codes, etc.

31. Capstone Workshop 31 Henderson DUSEL System Design Ventilation System Electrical System Incl. redundant, backup and emergency systems Fire and Life Safety Compartmentalization Monitoring & alarm Fire suppression Fire separations Egress routes & exit indicators Security stations Refuge Chambers Evacuation Routes Water & Wastewater Systems Data Systems Personnel control Control room w/ CCTV Cameras Personnel monitors Paging system Emergency & rescue systems Ambulance & fire truck Emergency cabinets Blast doors

32. Capstone Workshop 32 System Conceptual Design Basic services: Provided to occupied Upper, Central and Lower campus areas Power, air, potable water, fiber communications, lighting, emergency safety systems and selected drainage Ventilation systems: Provided to Upper, Central & Lower Campuses Basic normal and emergency ventilation Distribution systems Central services: Terminate at the experiment caverns for tenant connections Fresh air, chilled water, power, process piping, communications, and safety systems

33. Capstone Workshop 33 Ventilation & Cooling Design Criteria Virgin rock surface temperatures: 90°F at upper campus 107°F at central campus 142°F at lower campus Projection of bore hole temperature readings Heat transfer coefficient 0.098 Btu / hr-ft2 -°F after 720 days Based upon published data Mine ventilation air Supplied to the central campus at 78°F

34. Capstone Workshop 34 Ventilation Systems Access & egress tunnel ventilation Normal Upper, Central & Lower campus ventilation Interconnecting drifts ventilated using mine air (no A.C.) Caverns have conditioned air (chilled water coils, electric heating coils to control humidity, filtration) Clean space ventilation system Safety ventilation systems Compartmentalization smoke ventilation Smothering gas ventilation Central exhaust system Special exhaust system Special process exhaust, toilets, flammable liquid, etc. 10,000 cfm each at Central & Lower Campus

35. Capstone Workshop 35 Cooling Each campus will have a chilled water loop Estimated Immediate Cooling Load Upper Campus 25 Tons Central Campus 85 Tons Lower Campus 175 Tons Estimated Future Cooling Load Upper Campus 90 Tons Central Campus 395 Tons Lower Campus 430 Tons

36. Capstone Workshop 36 Plumbing Water systems Potable via bottles Non potable from mine system, stored in tanks Sanitary waste Lift station to a holding tank, periodic transfer to surface Gray water 500 gpm total flow Sumps at Central, Midway and Lower Campus Pumped into the Henderson mine water system

37. Capstone Workshop 37 Process Utilities & Fire Protection System Process utilities Central nitrogen gas system Compressed gas system Clean dry compressed air Cryogen relief De-ionized water system Fire protection system Each campus will have a wet pipe sprinkler system Drift standpipe systems Fire protection water storage tanks

38. Capstone Workshop 38 Lighting Normal lighting Caverns 30 foot-candles (either metal halide or fluorescent depending upon height) Office, lunch, shops at 50 fc Miscellaneous at 20 fc Egress routes at 1 fc Emergency lighting

39. Capstone Workshop 39 Power New feed from the surface at 13,800 V Unit substations at each campus 277/480V for lighting & power to mechanical systems 120/208V for receptacles Demand All campuses, immediate: 2975 kVA All campuses, future increment: 3990 kVA All campuses, total: 6965 kVA

40. Capstone Workshop 40 Emergency Systems Emergency power Fire alarm system Surveillance cameras Access control Security Duress alarm Asset locator Personnel emergency device & tracking

41. Capstone Workshop 41 Communications Backbone cabling Single-mode fiber 10-gigabit Ethernet 192 strands of fiber from surface and to each campus Campus cabling Category 6 unshielded twisted pair

42. Capstone Workshop 42 Site Placement Visitor Center – Interface with Public Parking – Relationship to Office Offices, Laboratories, Warehouse and Shops – Achieve a campus grouping of buildings Dormitory & Cafeteria - Location to be determined, near campus Future Expansion - Post Mine closure

43. Capstone Workshop 43 Surface Buildings Surface Building Program Visitor’s Centertotal 50,000 sfto yr 15 30,000 sf Admin/Offices/Laboratoriestotal 85,000 sfto yr 15 65,000 sf Dormitory & Cafeteriatotal 35,000 sfto yr 15 35,000 sf Assembly, Shops & Storagetotal 25,000 sfto yr 15 25,000 sf Existing Facilities (available after about 2026) Office Building87,759 sf Surface Shop26,000 sf Shaft Hoist House 9,600 sf Surface Warehouse14,000 sf Building reuse issues DUSEL program needs & phased buildout Existing building locations

44. Capstone Workshop 44 Surface Building Phased Buildout & Budget $ in thousands, 2006 $Between year 15 & year 20, existing Henderson Mine buildings become available for DUSEL re- development