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

Tory MPs chant ‘cover up’ during federal budget delivery

Liberal government’s fourth budget delivered in House of Commons Tuesday, but nobody could hear it

Former South Surrey boxer relishing role on Riverdale

Peninsula resident Darcy Hinds has recurring role on popular CW series

Surrey lottery winner being sued by co-workers

They claim he owes them $200,000 each, in a lawsuit filed in B.C. Supreme Court in Vancouver

White Rock shredding company says privacy breach allegations are ‘simply untrue’

A ‘whistleblower’ reported to media that sensitive documents were left exposed to the public

Delta mosque part of open-house effort launched in wake of New Zealand shootings

The ‘Visit a Mosque’ campaign aims to combat Islamophobia

VIDEO: Can you believe it? This B.C. hill pulls cars backwards up a slope

Sir Isaac Newton had clearly never been to this Vernon anomaly when he discovered gravity

Paramedic staff shortage at critical level: B.C. union

A number of units were out of service due to lack of staffing in Lower Mainland, union says

Fraser Health under fire again for taxiing homeless man from Langley to Hope

Patient sent to Hope shelter because a spot in the man’s home community couldn’t be located

Dead sea lion discovered on Hornby Island shoreline

Reports indicate animal was shot in the head

Celina Caesar-Chavannes quits Liberal caucus, sits as independent MP

The Whitby, Ont., MP has been a vocal supporter of Jody Wilson-Raybould and Jane Philpott

Surrey man arrested after allegedly punching woman during soccer game

Both involved were watching the U21 game in West Vancouver from the sidelines when things got heated

Catch-up immunization aims to stamp out B.C. measles resurgence

Vaccination records to be checked at B.C. schools next fall

B.C. dairy farmers say federal budget not enough to cut losses from USMCA

Concerns raised over vague details, funding access and impacts on growth

Free app launches to help immigrants, refugees as they settle in B.C.

Mobile app Arrival Advisor was developed by Vancouver-based non-profit PeaceGeeks

Most Read