UBC mine engineering professor Dirk van Zyl (left) is appointed to review the Mt. Polley mine tailings dam failure by Energy and Mines Minister Bill Bennett

New rules in effect for mine tailings ponds

Permits will specify dam construction, water level, motion detection and independent review, Mines Minister Bill Bennett says

The latest changes to B.C. mine regulations bring the province closer to its goal of preventing another tailings pond failure, says an independent expert who investigated the 2014 dam breach at Mt. Polley Mine.

Dirk van Zyl, professor of mining and the environment at the University of B.C. and one of three outside reviewers of the Mt. Polley failure, said the changes to B.C.’s Mining Code meet the recommendations made by engineers who examined the failure.

“These changes put B.C. in a leadership position and clearly set the groundwork for a more comprehensive approach to consistent tailings management in the province,” van Zyl said in a statement Wednesday. “It is another step towards the overall goal of moving to zero tailings storage facility failures.”

Energy and Mines Minister Bill Bennett said the changes to construction, water management and inspection can’t be expected to prevent every small release of water from a mine tailings pond in heavy rainfall. But he is confident the new regime will prevent major failures, even when unknown factors such as the weak layer under the Mt. Polley dam exist.

“Now we are prescribing a factor of safety that I think will account for the things you don’t know,” Bennett said.

Al Hoffman, B.C.’s Chief Inspector of Mines, said the new code has specific requirements for inside “beaches” to reduce pressure on the base of a tailings dam, the height of water allowed, the number of motion detectors on the dam and the frequency of inspections.

The new code requires every existing B.C. mine with a tailings pond to have an independent tailings review board in place by the end of 2016, with annual reports to be posted online.

That falls short of a recent recommendation by B.C. Auditor General Carol Bellringer that mine oversight should be independent of the ministry that issues permits and promotes mining investment. Bennett said he remains convinced that the technical nature of permits with hundreds of conditions makes the people who issue them the best qualified to enforce them.

NDP energy and mines critic Norm Macdonald said Mt. Polley was required to have supporting beaches and went for years without them, and also reported its water levels incorrectly before the dam failure. New rules will only make a difference if they are enforced, Macdonald said.

The Mt. Polley independent report concluded that a a layer of glacial till material at the base of the dam near Williams Lake wasn’t understood in enough detail when the dam was designed and built in 1997. Later raising of the dam to hold more water and tailings put pressure on the base layer and led to the failure.

The B.C. Conservation Officer Service continues its investigation of the Mt. Polley incident, and has authority to recommend charges for the environmental damage done by the failure.

The Mt. Polley dam has been repaired by owner Imperial Metals and the mine reopened, with work continuing to rebuild Hazeltine Creek and the shore of Quesnel Lake where a torrent of water and tailings poured down on Aug. 4, 2014.

 

Just Posted

UPDATE: Two Castlegar men killed in early morning MVI

The two-vehicle accident happened just after 4 a.m. Friday between Oasis and Birchbank

UPDATE: Columbia Basin Trust adds detail on $28 million new affordable housing plan

The Province and the CBT will each provide $14 million to create affordable rental housing

Columbia River Treaty to be renegotiated in early 2018

News came in a Tweet from the U.S. Department of State

Kelowna General Hospital Foundation raising funds for JoeAnna’s House

The facility has been named JoeAnna’s House after Joe and Anna Huber.

L’école des Sept-sommets in Rossland receives funding for water upgrade

L’École des Sept-sommets is one of six B.C. schools that will soon have access to healthier water.

VIDEO: Average Canadian food bill to rise by $348 in 2018

Atlantic Canada and B.C. will see the most increases for consumers

Owl found dead after eating rat poison leaves B.C. woman concerned

After finding the owl on her Surrey property, Christine Trozzo says the poison is a concern for kids

Change to CPP death benefit panned as insufficient to cover funeral costs

Funeral Services Association of Canada lobbied governments to raise the value to $3,580

#MeToo at work: Employers play a role in fixing culture of sexual harassment

B.C. workplaces are getting ahead of being the next MeToo debacle, calling on experts to train staff

B.C. woman brain injured in crash as a baby gets $1.1 million in damages

Trial heard the woman was 16 months old, being carried by her mother when they were both hit

Court denies WestJet’s bid to toss out discrimination lawsuit of former worker

Mandalena Lewis is suing WestJet over allegations of gender-based discrimination

VIDEO: 3 months later, rescued sea lion released back into ocean

The young animal was found in Campbell River three months ago

Sagmoen neighbours recall alleged hammer attack

Woman was screaming outside Maple Ridge townhouse in 2013

Accused B.C. drug smuggler to be extradited

Supreme Court of Canada upholds extradition order for accused Shuswap drug smuggler, Colin Martin

Most Read