Henderson DUSEL Conceptual Design Capstone Workshop Mark Kuchta

Henderson DUSEL Conceptual Design Capstone Workshop 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

Engineering Design Team Colorado School of Mines: Kieffer, Mark Kuchta, Scott (Mining Engineering, Geotechnical Engineering) Henderson Mine: Chip de. Wolfe, + Staff (Mining Engineering, Safety) CNA Consulting Engineers: Lee Petersen Capstone Workshop (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) 2

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

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

Capstone Workshop Site Overview 5

Shared Mine Infrastructure Ventilation • 150, 000 cfm available for DUSEL Electricity • 14 MW with 14 MW backup available for DUSEL. Capstone Workshop 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 6

Shaft Schedule: Man Cage Double Deck Man Cage • Capacity 100 people • Overall availability about 93. 5% • Normally available 24/7 Capstone Workshop 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) 7

Rock Handling System 80 ton trucks dump rock at crusher. Gyratory crusher reduces to – 4 in. 1 mile PC 1 and 10. 5 mile long PC 2 underground conveyors. Capstone Workshop 4 mile long PC 3 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 8

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

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

Henderson DUSEL Central Campus Access 7625 shaft station 7500 shaft station Capstone Workshop PC 2 Conveyor to Mill Site Central Campus Elev. 6, 800 ft (4300 mwe) LA Ramp DC 1 Ramp Dedicated Exhaust Drift Primary Access Ramp Fresh air Exhaust air Secondary Access Ramp Crusher 7065 Level PC 1 Conveyor 11

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

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

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

Capstone Workshop Shaft Cross Section 15

Capstone Workshop Access Ramp Cross Sections Muck Haulage Shipping Container 16

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

Capstone Workshop Upper Campus Layout 18

Capstone Workshop Central & Lower Campus Isometric 19

Capstone Workshop Central & Lower Campus Building Blocks 20

Capstone Workshop Central Campus Layout 21

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

Capstone Workshop Lower Campus 23

Infrastructure Design Life Criteria Capstone Workshop • 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 24

Capstone Workshop Lab vs. Infrastructure Development Plan 25

Capstone Workshop Development Sequence 26

Capstone Workshop Fire & Life Safety Concept 27

Capstone Workshop Lower Campus FLS Provisions 28

Capstone Workshop Lower Campus FLS Provisions 29

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

Henderson DUSEL System Design • • Capstone Workshop • 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 31

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 Capstone Workshop • 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 32

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 Capstone Workshop • Heat transfer coefficient • 0. 098 Btu / hr-ft 2 -°F after 720 days • Based upon published data • Mine ventilation air • Supplied to the central campus at 78°F 33

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 Capstone Workshop • 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 34

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 Capstone Workshop • Estimated Future Cooling Load • Upper Campus 90 Tons • Central Campus 395 Tons • Lower Campus 430 Tons 35

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 Capstone Workshop • Gray water • 500 gpm total flow • Sumps at Central, Midway and Lower Campus • Pumped into the Henderson mine water system 36

Process Utilities & Fire Protection System • Process utilities Capstone Workshop • 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 37

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

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

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

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

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

Surface Buildings • Surface Building Program Capstone Workshop • • • Visitor’s Center total 50, 000 sf Admin/Offices/Laboratories total 85, 000 sf Dormitory & Cafeteria total 35, 000 sf Assembly, Shops & Storage total 25, 000 sf to yr 15 30, 000 sf to yr 15 65, 000 sf to yr 15 35, 000 sf to yr 15 25, 000 sf Existing Facilities (available after about 2026) • • Office Building Surface Shop Shaft Hoist House Surface Warehouse 87, 759 sf 26, 000 sf 9, 600 sf 14, 000 sf Building reuse issues • • DUSEL program needs & phased buildout Existing building locations 43