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The Fraser Institute survey came out in February. I missed it—so here is a brief summary. (more…)

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In an upcoming EduMine course on Risk Assessment, Decision Making, and the Management of Mine Geowaste, we write the following on the topic of Net Present Value (NPV): (more…)

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Here is a comment posted on a recent blog item:

Jack,

I have been following your blog since the Mt Polley incident.

I am not sure if you have seen the design yet for the proposed copper project located in the Thompson River Watershed near Vavenby. Here is the link to the Knight Piesold report Appendix 3E. http://a100.gov.bc.ca/appsdata/epic/html/deploy/epic_document_333_38590.html

You will have to click on Appendix 3-E to download the PDF.

It looks like they are submerging PAG which results in a huge amount of water storage ( see attached document which shows the supernatant pond volume increasing every year; similar to Mt Polley). Let us hope they have their water quality model correct otherwise it will be a large treatment plant at the end of the life of mine.

Thought you might be interested in seeing what the BC regulators are being presented with even after the Mt Polley disaster. Will industry change to a more conservative approach to tailings designs?

Enjoy your musings.

I went to the site recommended and downloaded the Executive Summary, the section on Geochemistry, and the section on Closure.  Fascinating writings, particularly coming post-Mt Polley.  I hope some readers of this blog take a look at the report and comment.  For this is a public posting of design documents–worthy of repetition.  Now it remains to be seen if such public posting leads to public reading and comment.  For that, afterall, is the purpose of such public posting of designs for new mines and their tailings facilities.

I note that the closure cost estimate is some $16 M.  Presumably that is the basis of the bond being posted?  Comments on its sufficiency would be of interest.  As would comments on the way they plan to deal with acid generating tailings. As would comments on the above comment/question as to whether this is a more conservative design than Mt Polley.

I have not read in sufficient detail to comment with insight.  And maybe no other BC engineer has any more time or inclination than I have to comment.  That is a pity, but inevitable.  Is this a pointed reminder that in addition to such public postings, maybe we should have public posting of the comments by an Independent Tailings Review Board as Morgenstern recommends in the Mt Polley report?  Again your perspective would be welcome.

If you find the materials at the listed site formidable, rather go to the company’s website at this link.   It seems not to have been updated since 2013.  So the BC regulators are faster and more  up-to-date in their posting.

In the current mining downturn, these numbers are impressive:

The project is expected to employ up to 430 hourly and staff personnel. Based on industry experience, approximately 1,000 to 1,200 jobs will be created in the surrounding communities and elsewhere within the province to provide support to the project.

No wonder the BC government is doing all it can to get the word out about the project.

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Here is a welcome announcement from the University of British Columbia.  An Executive MBA in Strategic Mining Management. I wish I were young enough to attend–but I am one of those soon to be demographic shifters, a baby boomer about to retire. Maybe I can lecture in my dotage on the relevance of tailings management to strategic mining management.  But they probably won’t give a blogger the podium. So be it.  We must simply applaud the move, support them, and wish them and their graduates well. Here the full announcement: (more…)

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The blogger muse prompted by opera & brandy demands release of mental pressure.  Thus a second posting on Mt Polley in one day.  This afternoon, I was asked what the implications of Mt Polley were to mining world-wide.  Some of the answers, unpremeditated, I gave. (more…)

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The site used to be called Companies & Properties.  Now from InfoMine is a vastly updated, expanded, and easier to use replacement called IntelligenceMine.  It is not, but could be called Intelligent Mine,  Mining Intelligence, or How-to-Find-Out-Everything-You-Ever-Wanted-to-Know-about-Mines & Properties.  (more…)

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I am in Guatemala and at the Tahoe Resources Escobal Silver Mine. I have previously noted that I and my daughter are the engineers who designed and now give advice on the operation of the filter-pressed tailings stack. Much credit must also go to Flor de Maria Gonzalez and Sergio Aycinena of Geosimsa who are the engineers of record in Guatemala. We have worked closely with them these past four years and both have proven sound partners. Particularly Flor who as a young woman has made her mark by her excellence in a male-dominated Guatemalan mining environment. (more…)

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