Engineering & Mining Journal

MAR 2019

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REGIONAL NEWS - U.S. & CANADA 8 E&MJ • MARCH 2019 www.e-mj.com Centerra Gold Receives 3-year Water Approvals at Mount Milligan Centerra Gold Inc. announced that the British Columbia Environmental Assess- ment Office has approved an amendment to Mount Milligan's environmental as- sessment certificate to permit access to additional sources of surface water and groundwater. Once the company receives the relevant water licenses, it will be per- mitted to obtain water for use in Mount Milligan's milling operation from Philip Lake 1, Rainbow Creek and Meadows Creek until November 30, 2021, at rates that are protective of the environment. The company will also be permitted to access water from groundwater sources within a radius of six kilometers (km) of the Mount Milligan mine for the life of the mine. The company has begun the process of upgrading its water pumping infrastruc- ture at Philip Lake 1 and Rainbow Creek and expects to be in a position to pump water from such sources prior to the spring melt, which is expected in April. The com- pany also expects the additional water cap- tured during the spring melt will be suffi- cient to allow Mount Milligan to return mill processing operations to full capacity and that, following a ramp up of milling opera- tions, Mount Milligan's mill throughput will average approximately 55,000 metric tons per day through the remainder of 2019. "We are delighted that Mount Milligan has received these crucial approvals for wa- ter access over a three-year period, which will allow processing operations to return to full capacity and pave the way for Mount Milligan to realize its full potential," Scott Perry, Centerra president and CEO said. Draft EIS for Alaska's Pebble Project Moves Forward The Draft Environmental Impact State- ment (EIS) for the Pebble Project, a pro- posed open-pit mine in southwest Alaska, has been released by the U.S. Army Corps of Engineers and now moves on to the next phase, public review and comment. North- ern Dynasty is the owner of the Pebble Partnership (PLP) and began the permit- ting process at the end of 2017. The PLP said it believes it demonstrat- ed that the proposed 20-year mine devel- opment plan for the Pebble deposit can be done in an environmentally responsi - ble manner. "Our preliminary review of the Draft EIS shows no major data gaps or substan- tive impacts that cannot be appropriately mitigated," said PLP CEO Tom Collier. "We see no significant environmental challenges that would preclude the pro- ject from getting a permit and this shows Alaska stakeholders that there is a clear path forward for this project that could po- tentially generate significant economic ac- tivity, tax revenue and thousands of jobs." Collier said the PLP team will under- take an extensive technical review of the Draft EIS to develop the company's formal comments, expected to be submitted near the end of the public comment window. Collier added that since the document is a draft he fully expects substantive com- ments from a range of project stakehold- ers while emphasizing that there do not appear to be any major hurdles. "Since this is our first chance to see what the Corps has evaluated, I fully ex- pect a few bumps along the way before we conclude this process," Collier said. "This is what reviewing a draft is all about. While we have a lot of work remaining in front of us, this is clearly a very exciting time for the project as we have reached a significant milestone for Pebble." In December 2017, PLP submitted its application with the Corps to initiate permitting for the mine development plan for the Pebble Deposit. The project has a smaller footprint, has no major mine fa- cilities in the Upper Talarik drainage, and will not use cyanide for secondary gold recovery, the company said. Liberty Gold Gains Approval for Black Pine Liberty Gold Corp. announced the approv- al of a plan of operations at the Black Pine Project, one of its three principal gold projects located in the Great Basin. Located in southern Idaho, Black Pine is a past-producing, run-of-mine, oxide- heap-leach gold mine that contains a large, shallow, district-scale, Carlin-style sedimentary rock-hosted gold system. The plan of operations will allow Liberty Gold comprehensive access to the 7.3-square-kilometer core of an es- timated 12-km 2 gold system. A total of up to 141 acres can be disturbed un- der the permit, including up to 49 km of new roads and 370 drill pads, subject to a staged annual reclamation plan. The main gold zone encompassing the his- toric Black Pine mine is not subject to seasonal closures and can be accessed year-round, weather and road conditions permitting. A previously granted plan of operations allows Liberty Gold access to an additional 71 drill sites. Access to more water will allow the Mount Millligan mill (above) to achieve full capacity.

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