The most confident fellow in the meeting was the specialist in permitting from Toronto. He was old, like me, and in total command of his subject. He reminded us: “California is both the most difficult and yet the easiest state in the Union in which to permit a mine. It is easy because the process is simple: fill in the boxes, check off the items of the checklist, and it is done. It is the most difficult because you need to have done the work to ensure the right answer to fill in the boxes. If you do not have a comprehensive, well-thought-out, and defensive plan, you cannot fill in the boxes, complete the checklist, and get the regulators to say OK.” (more…)
Archive for the ‘Policy and procedure’ Category
I am told that yesterday’s posting was hard to read. So rather than write tonight, let me simply post some pictures I took from a public road of tailings facilities closed by the Peruvian regulators. Not sure how long the gabion baskets will last.
Posted in consulting, Geosynthetics, Geotechnical, Heap leach, Reclamation, Tailings, Waste Rock, tagged cover, erosion, geosynthetic, mine closure, Reclamation, rock cover, slope stability on July 2, 2014 | Leave a Comment »
The exterior surface of most tailings, waste rock, and heap leach facilities include:
- A top deck which is the flatter surface that forms the top surface of the facility. This is usually sloped at between one and five percent, primarily to promote runoff.
- The sideslopes which are easily covered if they are inclined at about five horizontal to one vertical (5H:1V) but which in practice may be as steep as 1.4H:1V.
Covers on the top deck are less subject to erosion, slope instability, and soil creep than covers on sideslopes. Thus different covers may be appropriate at the same facility on the top deck as compared to the sideslopes. Here are a few idle thoughts on sideslope covers for mine waste facilities. (more…)
Subaqueous disposal means placement of tailings into or beneath a water cover. Deposition of tailings into a lake is the most common subaqueous method. In many instances the embankment dam is constructed as a water retaining structure and the impoundment is filled with water into which the tailings are discharged. (more…)
Posted in consulting, Enviromental, environmental, Human relations and mining, Latin America, Reclamation, tagged Anglo American, Chile, guidance, mine closure, promises & lies, toolbox on May 16, 2014 | 2 Comments »
Today we completed a successful three-day EduMine webcast on mine closure. Folk from Germany, Finland, Mauritania, South Africa, Australia, Guatemala, the USA, and Canada “attended.” We are flattered and thankful to them and applaud their interest in a critical topic and facet of mining. If you missed the webcast, contact EduMine and ask them to repeat it. (more…)
Posted in About the news, British Columbia, California, consulting, Enviromental, environmental, Jobs and Salaries, Oil sands, People, Reclamation, Tailings, Waste Rock, tagged advanced tailings, christian kujawa, conference, edumine, Ian Hutchison, lawrence charlebois, Myra Falls, nyrstar, Paterson and Cooke, robert cooke, slr, Tailings, webcast on April 22, 2014 | Leave a Comment »
There is still time to join us for the upcoming EduMine webcast Advanced Tailings and Mine Waste Facility Design, Operation, and Closure. Here is the link to the course. Even if you have taken other courses before conferences, or the other EduMine webcast on Introduction to Tailings, or our previous Advanced Tailings courses, I know you will find interesting and exciting information, perspectives, practices, and case histories in this new course. (more…)
More is said about mine closure than is done about mine closure. Will they ever close Giant and Faro? I doubt it. Still if the topic interests you, here a few upcoming events. The InfoMine Mine Closure Conference in Belo Horizonte promises lots of information about mine closure in Brazil. Not many of us can get that far south or want to go that far south. Last time there was an InfoMine conference in Belo, there were riots and protests and the delegates were confined to the hotel. (more…)
The general approach to undertaking a risk assessment is well described in International Standard IEC/ISO 31010, which also provides considerable information about risk assessment methods. It notes, however: “The standard does not provide specific criteria for identifying the need for risk assessment, nor does it specify the type of risk analysis method that is required for a particular application.” (more…)
Posted in About the news, brandy, consulting, decomissioning, Enviromental, environmental, mining, North America, Reclamation, tagged contaminated sites, government, gravy trian, superfund, usa on April 11, 2014 | 1 Comment »
Below is a report that hit my email inbox today. I repeat in full, not because mines are the main culprit, but because mines are probably NOT the main culprit. This report is a sobering reminder that dry-cleaners, car-battery recyclers, old military bases, and jails are also major contaminators. Yet so little is written or done about them—it is not a very sexy topic–so much easier to excoriate mining. Not that Giant, Faro, and a few other old mines are going to be cheap to cleanup. (more…)