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

Coastal GasLink gets interim injunction against Unist’ot’en

The LNG pipeline company can start work Monday with enforcement approved by court.

B.C’s salmon advisory council skips Terrace

Public engagement tour excludes all non-coastal communities

Great kids doing great things for Houston

Members of the Houston Minor Hockey and the Houston Ringette canvassed the… Continue reading

Owners of mining project south of Houston allowed to drill again

New Nadina’s free miners certificate had been suspended in September

Council seeks to replace By-Mac Park’s boat launch

The boat launch is currently unusable; district has received several complaints

Trudeau to make it harder for future PM to reverse Senate reforms

Of the 105 current senators, 54 are now independents who have banded together in Independent Senators’ Group

Canada’s ambassador meets with second detainee in China

Global Affairs says John McCallum, Canada’s ambassador to China, met with Spavor Sunday

B.C. VIEWS: Andrew Wilkinson on taxes, ICBC and union changes

Opposition leader sees unpredictable year ahead in 2019

5 tips for self-care, mental wellness this holiday season

Ministry of Mental Health and Addictions urging British Columbians to prioritize self care through festive season

Rescued B.C. cat with misshapen legs in need of forever home – with carpet

Mirielle was born with misshapen back legs and after a tough life on the streets, is looking for a forever home.

VIDEO: Craft growers will add to recreational market, cannabis producer says

Two B.C. men say their expertise in running small legal medical grow-ops a benefit to recreational market

World Sikh Organization demands Canada prove Sikh extremism is a threat

Sikh community says this is first time such extremism has been mentioned in federal terror-threat assessment

Risk of catching the flu increasing in B.C. this holiday season: BCCDC

Dr. Danuta Skowronski with the BC Centre for Disease Control says influenza will pick up during the holidays

Boeser has 2 points as Canucks ground Flyers 5-1

WATCH: Vancouver has little trouble with slumping Philly side

Most Read