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Tuesday, August 4, 2020 | History

2 edition of Tonnes of toxic tailings pouring into Ontario river found in the catalog.

Tonnes of toxic tailings pouring into Ontario river

Kevin Vincent

Tonnes of toxic tailings pouring into Ontario river

officials warn of ecological disaster after mine dam bursts

by Kevin Vincent

  • 362 Want to read
  • 11 Currently reading

Published by s.n in S.l .
Written in English


About the Edition

The disintegration of a tailings dam at the abandoned Matachewan Consolidated Gold Mines and subsequent tailings spill into the Montreal River were discussed. One week after the dam burst due to heavy rainfall, the tailings had travelled 50 km downstream and raised the river"s lead level to 13 times acceptable limits. The environmental impacts on the biota and local communities were discussed along with the actions being taken by the government to deal with the spill.

Edition Notes

Other titlesGlobe and mail (0319-0714)
StatementKevin Vincent
The Physical Object
Paginationp. A10.
Number of Pages10
ID Numbers
Open LibraryOL21640101M

  VANCOUVER -- A massive breach in a copper and gold mine's tailings pond near Quesnel, B.C., Monday has flooded the adjacent river with five million cubic metres of what a . A fibrous protein complex that consists of proteins folded into a specific cross beta-pleated sheet structure. This fibrillar structure has been | Explore the latest full-text research PDFs.

  Ok Tedi, Papua New Collapse of waste rock dump and Mt waste rock and 4 August 22 Guinea tailings dam Mt tailings Flow into local river Failure of fluorite tailings dam due 3 July 19 Stava, Italy to inadequate decant construction m people killed. When Background Briefing visited, 59 million litres a day of untreated toxic water known as 'acid mine drainage' was pouring straight from the pit into the Dee River.

On the high island of Bougainville, in Papua New Guinea, for example, opencast copper mining has resulted in the discharge of about , tonnes of rock waste and tailings daily. The tailings have spilled down into a headwater valley of the Kawerong River and thence into the Jaba valley, where they have spread out across the valley floor.   Initial water quality samples collected from towns near a massive tailings pond breach in British Columbia indicate that none of the contaminants exceed provincial or federal guidelines for.


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Tonnes of toxic tailings pouring into Ontario river by Kevin Vincent Download PDF EPUB FB2

A haul truck that carries as much as tonnes of rock is delivering waste rock to build ramps into the tailings storage facility at Imperial Metals Mount Polley gold and copper mine so that a. The latest desperate proposal would allow toxic tailings to be slowly discharged into the Athabasca River, using the age-old industry trick that “dilution is the solution to pollution.”.

The evidence that the ponds are leaking is stark. Between and government inspectors determined that at least 15 water samples at six of seven sites near tailings ponds had levels of toxic chemicals above government guidelines.

And government studies further showed that toxins were likely leaking into the Athabasca River. Tailings ponds in northern Ontario considered safe, scientist says.

Social Sharing. The recent disaster at the Mount Polley Mine released billions of litres of wastewater into river systems. Tar sands companies are knowingly allowing toxic chemicals from tailings ponds to leak into local rivers and aquifers – and nothing is being done about it.

Unfortunately, a relatively new Alberta framework to deal with this toxic legacy may be nearly as inadequate as the discredited policy it. EDMONTON -- New federal research has strongly backed suspicions that toxic chemicals from Alberta's vast oilsands tailings ponds are leaching into groundwater and seeping into the Athabasca River.

Oil sands tailings ponds are engineered dam and dyke systems used to capture oil sand sand tailings contain a mixture of salts, suspended solids and other dissolvable chemical compounds such as acids, benzene, hydrocarbons residual bitumen, fine silts and water.

Large volumes of tailings are a byproduct of bitumen extraction from the oil sands and managing these tailings is one of. In June a barge transporting tonnes of cyanide sank in the Fly River. Only a few drums of the poison were recovered.

Only days later an operating plant failure allowed over cubic metres of cyanide to pour into the Ok Tedi River; dead fish and crocodiles could be seen for a considerable distance downstream.

Tailings pond breach sends toxic surge down B.C. river. Dramatic video shows effluent surge inundating an area waterway; B.C.'s Ministry of Environment says.

Article content. Quebec’s standard for acceptable workplace exposure to asbestos fibres, currently 10 times what it is in the rest of Canada, should be lowered as soon as possible to harmonize. But ina dam co-owned by BHP Group and Vale SA collapsed, unleashing 44 million cubic meters of mining waste into the river and Atlantic Ocean, km away, in what became Brazil's worst.

The Canadian mineral industry generates one million tonnes of waste rock andtonnes of tailings per day, totaling million tonnes of waste per year. After being removed, waste rock, which often contains acid-generating sulphides, heavy metals, and other contaminants, is usually stored above ground in large free-draining piles.

The sheer magnitude and often toxic nature of the material held within tailings dams means that their failure, and the ensuing discharge into river systems, will invariably affect water and sediment quality, and aquatic and human life for potentially hundreds of km downstream (Edwards,Macklin et al.,Macklin et al.,Macklin.

One ton of ore yielded around 6 pounds of uranium, the remainder ending up as waste. The place where the radioactive water once poured into the river is the biggest rapid in town, and a.

The B.C. government has approved Pretium’s $million Brucejack gold mine, the first mine approved since the collapse of the Mount Polley mine tailings.

Indigenous and Northern Affairs Canada is in the final stage of public consultations in the Yukon for the estimated year remediation of Faro Mine, once the largest open pit lead-zinc mine in the world. The project will wrap up phase 2 public consultations by early July for what may be a $million project targeting 70 million tonnes of tailings and million tonnes of waste rock left.

Tailings ponds a toxic legacy of Alberta’s oilsands the Athabasca River eventually flow into the Mackenzie Delta, which flows into the Beaufort. A tailings dam is typically an earth-fill embankment dam used to store byproducts of mining operations after separating the ore from the gangue.

Tailings can be liquid, solid, or a slurry of fine particles, and are usually highly toxic and potentially tailings are often used as part of the structure itself.

Tailings dams rank among the largest engineered structures on earth. New federal research has strongly backed suspicions that toxic chemicals from Alberta's vast oil sands tailings ponds are leaching into groundwater and seeping into the Athabasca River.

The property’s most unique feature and one that is an integral part of the company’s overall strategy is a sizeable body of tailings estimated to be in the range of to million metric tonnes.

These tailings, and others at the project, are directly related to the very extensive mining history at what became known as the El Tigre Mine. OCLC Number: Notes: "February " Description: 1 online resource (42 pages): illustrations, maps: Contents: Executive summary --Table bodies imperiled by current or proposed tailings dumping --Table corporations that dump tailings into natural water bodies --Tailings dumping --Ocean dumping --River dumping --Table Tailings and waste rock dumped .Federal study shows water from tailings ponds leaching into Athabasca River.

CBC News Posted: AM MT That tailings mix, which contains toxic chemicals, is found in.EDMONTON - New federal research has strongly backed suspicions that toxic chemicals from Alberta's vast oilsands tailings ponds are leaching into groundwater and seeping into the Athabasca River.