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

RDKB receives funding for disaster response ‘work space’ in Midway

The work space and storage will be used by disaster response volunteers.

Christina Lake Ladies’ Golf finishes successful year

The team starts back up again in April – new members welcome!

Border Bruins lose to Beaver Valley on home ice

The team will play the Jack this Friday at 7 p.m.

Feeling festive at annual Midway Christmas party

The party featured a visit from Santa

It’s the last day to vote in B.C.’s referendum on electoral reform

Ballots must now be dropped off in person to meet the deadline of 4:30 p.m.

Man caught on camera allegedly trying to defraud ICBC

Auto-insurer warns B.C. drivers to record info after crashes

Warning issued as forecast calls for 20-foot waves in Tofino

Dangerous waves, strong currents and upper-shoreline flooding expected for Tofino-Ucluelet area

An 800-pound pig named Theodore needs a forever home, B.C. society says

‘Theodore is not destined to be somebody’s bacon’

2,000 Canadians died of an overdose in first 6 months of the year

New data from the Public Health Agency of Canada shows the crisis is not subsiding

Teenager Alphonso Davies wins Canadian Men’s Soccer Player for the Year Award

Derek Cornelius and Chilliwack native, Jordyn Huitema were named Canadian Youth International Players of the Year

B.C. teen MMA fighter shows heart

Young Unity MMA competitors bring home Ws

Another B.C. city votes to ban single-use plastic bags

First six months of proposed ban would focus on education, not enforcement

UK Prime Minister Theresa May wins party no-confidence vote, but troubles remain

May won the vote of 317 Conservative legislators with a 200-117 tally

B.C. trustee’s anti-LGBTQ comments got him barred from schools

Barry Neufeld calls vote to leave him off liaison list ‘workplace discrimination’

Most Read