September 16, 2011 Chuck Hubert Environmental Assessment Officer Mackenzie Valley Review Board Suite 200, 5102 50th Avenue, Yellowknife, NT X1A 2N7 Dear Mr. Hubert RE: Environmental Assessment EA0809-002, Prairie Creek Mine Comments on Final Arguments Canadian Zinc Corporation (CZN) is pleased to provide the attached comments on the Final Arguments submitted by parties at the conclusion of environmental assessment EA0809-002. Technical replies are provided, where necessary, by stating CZN’s position with respect to recommendations made. Where recommendations are unchanged from Technical Reports, the Review Board is directed to CZN’s comments on Technical Reports in Attachment 1. The contents of Attachment 1 should be read first since context is provided for some of our responses to the Final Arguments. Please note that our comments on Technical Reports contain no new information, and no timeline was provided by the Review Board for their submission. Also attached is a final commitments table (Table 1), and the curricula vitae of the main individual consultants who provided deliverables for the environmental assessment process. Yours truly, CANADIAN ZINC CORPORATION David P. Harpley, P. Geo. VP, Environment and Permitting Affairs Suite 1710-650 West Georgia Street Vancouver, BC V6B 4N9 Tel: (604) 688-2001 Fax: (604) 688-2043 E-mail:
[email protected], Website: www.canadianzinc.com COMMENTS ON PARTY FINAL ARGUMENTS Aboriginal Affairs and Northern Development Canada (AANDC) Water Management and Storage Recommendation 2: Final selection of an additional water storage option must be done in conjunction with the determination of Site Specific Water Quality Objectives for Prairie Creek. If increased capacity associated with construction of an additional pond provides for the ability to meet Reference Condition Approach benchmarks as defined within the derivation process, that option must be selected and implemented.