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

Ravens Crossing breaks ground on happy Hygge cohousing project

Speeches, music and a blessing as 80 people attend start of Danish-style development

Central Saanich police respond to 419 calls in July, including speeding motorcyclist

Police chase deemed too risky, biker tracked down the next day

‘Listen to your body:’ Saanich woman fights to have breast implants removed

Woman struggles to find doctor to remove Allergan textured implants, recently linked to rare cancer

Sidney salon closes citing persistent lack of staff

Housing, transit continue to affect workers on Saanich Peninsula

Saanich approves new eight- and 11-storey residence buildings for UVic

Residents also supported the environmentally friendly residences

VIDEO: Come along for the ride on Tour de Victoria

Reporter captures video footage of his Tour de Victoria ride

POLL: Should there be a ban on gas-powered leaf blowers?

We’ve all heard them, and most likely cursed them under our breath.… Continue reading

Greater Victoria wanted list for the week of Aug. 23

Greater Victoria Crime Stoppers is seeking the public’s help in locating the… Continue reading

Vancouver Island RCMP hunt for man after pair of indecent exposure incidents

Elderly Qualicum Beach woman grabbed by man who had been masturbating in the woods

Bodies of two missing Surrey men found near Ashcroft

Ryan Provencher and Richard Scurr have been missing since July 17

Pile of wood mulch ‘spontaneously combusts’ at Vancouver Island industrial site

Business owner thanks fire department for quick response

Five hedgehogs quickly adopted after being left at BC SPCA

Lucky new owners picked up their pets from Maple Ridge branch on Aug. 20

B.C. cricket players get interrupted by racist remark

Community has had protocols in place for years to respond to prejudice

Most Read