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Tulsequah Chief Mine loses big investor a past Empire report, Canadian inspectors have known since 1990 that the mine is leaking sulfuric acid into the Tulsequah River, which flows into the Taku River and into Southeast Alaska.The Taku River enters U.S. waters about 10 miles...
Chieftain plans Taku River barge

...that Chieftain's feasibility study from December 2012 raises several significant problems with barging, saying the Tulsequah River "would require more or less continuous dredging during the shipping season to maintain an open channel."The full...
KSM Pt. 2: A river runs through it, and that's the problem

...words, after 200 years, no one knows."The Tulsequah Chief Mine has been leaching acid mine drainage into the Tulsequah River, which flows into the Taku River, since it closed in 1957. Though a recent study found the drainage is not having...
My Turn: Transboundary impacts on Southeast fishing

...contain billions of tons of acid-generating rock. ? The reopening of the Tulsequah Chief mine, located on the Tulsequah River just upstream of its confluence with the Taku River. The Taku is Southeast Alaska's biggest salmon producer...
Report: Fish unaffected by Tulsequah Chief mine discharge

...poses a low risk to fish in the Tulsequah River, according to a third-party...quality at four sites in the Tulsequah River, where the mine is located near...leaking sulfuric acid into the Tulsequah River, down the Taku River and into...
KSM part III: 'A perfect storm' for mining push? reprocesses two previously mined mineral deposits. The mine closed in 1957 and has been leaking acid into the Tulsequah River, which flows into the Taku River, since its closure. There was a brief attempt at cleanup before the then-owner...
Chieftain to shut down Tulsequah mine water treatment plant

...Mine while it secures funds. The company said cost overruns precipitated the shut down.The mine is located on the Tulsequah River near where it connects with the Taku River, approximately 40 mile northeast of Juneau on the British Columbia side...
My turn: Is an operating mine needed to clean up the Tulsequah Chief site?

...Cominco in the 1950's. The mine site is on the Tulsequah River, the main tributary to the Taku River, upriver of...heavy metals, is probably once again flowing into the Tulsequah River. Previous inspections have found the discharge to...
B.C. approves Chieftain's environmental assessment

...Assessment process until Chieftain produced a working feasibility study and restarted a water treatment facility on the Tulsequah River.Chieftain had said the Taku Tlingit's actions would not affect the company's efforts to proceed with the mine's...
Tulsequah misses its cleanup deadline

...lead, zinc, cadmium and arsenic per year into the Tulsequah River. Federal regulators originally ordered Redfern...tailings into a large impoundment in a flood plain of the Tulsequah River, a tributary of the Taku River. Gillnet fishermen...


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