There are obvious lessons to be learned on properdue diligence for assessing mine water issues. Don’tmiss key problems that can add years of financialstrain to the bottom line of your mine economicmodel. Address the crucial questions for properevaluation in the NI 43-101 process:

• How will the geochemistry change whenmined materials are exposed to oxygen andwater?

• Do you have sufficient static and kinetic testdata for the PEA, PFS or FS

• How best to minimize oxidation of sulfide-richwaters?

• Will passive dewatering suffice, or do youneed wells and pumps?

• How much water will require activemanagement during mining and dewatering?

• What will the water management costs be forthe various phases of the mine cycle?

• What does closure look like for waste rock andtailings facilities?

• Will the underground or open pit waters becontained and innocuous?

Enviromin is a small, experienced, mine-focused consultancy located in Bozeman, Montana with QualifiedPersons (QP’s) in the areas of Geochemistry and Hydrogeology/Dewatering. They have experience workingon multidisciplinary mine planning teams to take care of the water aspects of a new mine project oracquisition.

Lisa Bithell Kirk, PhD,PG, SME-RMGeochemistry

Commodities: Cu, Au,Mo, Ag, Coal

Global Experience: US,Canada, Mexico, Chile

Focus: Waste RockManagement, Tailings, PitLakes, Closure

Paul D. Williams, PG, SME-RM Hydrogeology

Commodities: Au, Ag, Cu, Mo, Nb, Zn, Coal

Global experience: US, Colombia, French Guiana, Canada, Mexico, Peru, Australia, Chile, Azerbaijan Focus: Mine Water Management and Dewatering

www.enviromininc.com 524 Professional Drive, Bozeman, MT, 59715 406-581-8261

Mine Water Due Diligence