Here is the link to the new report Lower Athabasca Region Tailings Management Framework for the Mineable Athabasca Oil Sands. In some fifty pages it sets out a new way of dealings with oil sands tailings. Lots of detail yet not much detail. The document sets itself these goals: (more…)
Archive for the ‘Reclamation’ Category
Posted in About the news, Enviromental, environmental, Law (Mining), mining, Oil sands, Reclamation, Tailings, tagged alberta, athabasca, Oil sands, tailings management on March 17, 2015 | Leave a Comment »
Posted in About the news, British Columbia, California, Colorado, due dilligence, Law (Mining), Mining history, Reclamation, safety, Tailings, tagged best management practices, canadian dam associatin, cda, guidelines, PMF. MCE, Tailings, uranium study, Virginia on November 18, 2014 | 9 Comments »
This picture and the others in this posting were taken by me at Knotsberry Farm in California.
A great place to visit and enjoy a terrifying ride along the raging river of insanity.
If you seek a thorough and intelligent analysis of dealing with uranium mill sites (and particularly the tailings facility) take a look at the following–it is an amazingly comprehensive document–and should be required reading for all involved in mine management, regardless of whether the mine is uranium, copper, gold, or something else. (more…)
Posted in About the news, British Columbia, Enviromental, Oil sands, Reclamation, Tailings, tagged alberta, amendment, Directive 74, mt polley, polymer, tailings strength on September 16, 2014 | 15 Comments »
The numbers just do not add up. As I read the many sites on the web, I learn that British Columbia has about thirty operating mines. The BC government has about $172 million in closure bonds. Say about five or six million a mine. That seems grossly inadequate to me. I have just finished estimating closure of one mine and it came to nearly $60 million. Does this mean BC should have $1.7 billion in closure bonds? Here are some observations from various websites that may help you ponder this issue. (more…)
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…)
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…)