Canadian Large Projects
Large Mine Project Manager
Tulsequah Chief Mine Project
- Project Proponent is Chieftain Metals Corporation
- • A past producing mine that is now proposed as an underground copper, lead, zinc, silver, and gold project located in the Taku watershed approximately 10 miles from the Alaska border.
- • The mine site is adjacent to the Tulsequah River, which confluences with the Taku River approximately 7 miles downstream.
- Legacy Issues
- • Acid Rock Drainage (ARD) has been leaching from the old mine workings and waste rock at the Tulsequah Chief mine into the Tulsequah River since historic mining ceased in 1957. A temporary water treatment plant was constructed in the fall of 2011 and operated between March and June 2012 before being shutdown and bypassed.
- Non-compliance Orders
- • B.C. Ministry of Environment (MoE) Notice of Non-Compliance (July 25, 2012)
- • Chieftain Metals Mitigation and Re-Start Report (July 27, 2012)
- • B.C. joint agency letter (November 10, 2015)
- • MoE Non-Compliance Advisory Letter (November 5, 2015)
- • EAO Non-Compliance Order (November 10, 2015)
- • B.C. Ministry of Energy and Mines (MEM) inspection report (October 15, 2015)
- • MoE inspection record (October 15, 2015)
- • EAO inspection record (July 14, 2015)
- Field Studies
- • ADF&G Technical Report No. 16-06, Legere & Timothy, 2016
- • Aquatic Risk Assessment (Dec. 20, 2013)
- • Aquatic Risk Assessment (April 2017)
- - State of Alaska's comments (Sept. 2017)
- • ADF&G Technical Report No. 11-09, Hitselberger, 2012
- • Taku-Tulsequah River Mining Activities (ADF&G Technical Report No. 12-01)
- Provincial Environmental Assessment
- • The Environmental Assessment Certificate (EAC) was issued on Dec. 12, 2002 with 126 enforceable conditions.
- • Under conditions of the EAC, Chieftain must address the existing ARD through reclamation, closure and water treatment activities completed in conjunction with development of the new mine workings.
- • Chieftain Metals announced an updated feasibility study in October 2014 that eliminates the access road and proposes conventional barging on the Taku River.
- • This change will require an amendment to the EAC, which may include public notice, depending on the nature and scope of the proposed amendment.
- Provincial Permitting