Feeds:
Posts
Comments

Posts Tagged ‘Tailings’

DSCF4423

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…)

Read Full Post »

DSCF2216

A million here.  A million there.  Who cares?  It is just taxpayer money spent by your local government providing the services you expect to be provided at no cost!  Just learnt that HATCH has been awarded a contract by the BC Ministry of Energy and Mines (MEM) to review the independent reviews of BC tailings dams that MEM ordered pursuant to the failure of Mt Polley. (more…)

Read Full Post »

DSCF4660

A simple cover for a tailings facility may be no more than a layer of compacted tailings overlain by soil in which vegetation can grow. If control of infiltration is not required, this cover may be cost effective.   If the climate of the site is good, the layer of soil thick, and the vegetation abundant, you may have an evapotranspirative cover that limits infiltration. (more…)

Read Full Post »

Foto: Peter Öhman

The translation above the pictures reads:

It doesn’t matter that it is Sweden’s most modern mine, built according to environmental laws, which the Government says is the world’s strongest. In addition, Northlands mine outside Pajala is a financial flop, it is now also an ecological disaster.
One million cubic metres of water with toxic heavy metals such as nickel, cadmium, lead, copper, and more flows straight out of the wrecked mine dam to Muonioälven and later the Torne River, which is classified as a national river.

At this link you will find four photos that appear to show the breach of the perimeter embankment or dike and spillage of tailings into the surrounding countryside.  Above is one of them.

The reports make little mention of the causes of failure.  Although the four pictures appear to show more than one breach.  A posting on Facebook dates the failure as 19 July 2014.

Please comment if you know more.

Read Full Post »

mooi aarbres_4[1]

I write this fifty percent in jest, fifty percent in earnest, fifty percent with tounge in cheek, and fifty percent as a concerned citizen.  You decide which is which in what follows, for I cannot decide.  After the failure of the Bafokeng tailings facility, we built a dike across the failed area and picked up the tailings on the mine property.  We put these picked-up tailings back in the slimes dam.  Then we built a rockfill dike with an upstream filter across the valley just at the edge of the mine property.  Thus any tailings we did not pick up were washed down to the dike and were in due course picked up and put back in the slimes dam.  In due course, they filled in the failure volume with new tailings as the mine continued production. (more…)

Read Full Post »

tumblr_mxr1tcassC1s967nno1_500[1]

While we in BC have been preoccupied by the Mt Polley situation, yet another tailings failure has occurred.  This time in Mexico.  That brings the number of failures this year to three:  Duke Energy, Mt Polley, and Cananea.  Just the right number if the probability of failure is one in five thousand. (more…)

Read Full Post »

DSCF2334

We are heartened by today’s announcements re the Mt Polley tailings facility failure.   I particular we applaud the choice of experts retained to do the engineering review. (more…)

Read Full Post »

Older Posts »

Follow

Get every new post delivered to your Inbox.

Join 597 other followers