UBC mine engineering professor Dirk Van Zyl (left) is introduced by Energy and Mines Minister Bill Bennett as one of three independent experts to investigate the cause of the Mount Polley tailings dam failure. Their report is due by Jan. 31.

Mount Polley spill may be left in place

Further tests will determine whether the metal-bearing sand will be removed or left where it is, Mines Minister Bill Bennett says

Further tests of mine tailings spilled down a creek bed from the Mount Polley mine will determine whether the metal-bearing sand will be removed or left where it is, Energy and Mines Minister Bill Bennett said this week.

The first lab tests on sediment samples at the mouth of Hazeltine Creek showed that while the material that poured down to the creek mouth in Quesnel Lake isn’t a health hazard to humans, its iron and copper content are above federal and provincial standards for aquatic life.

Bennett said it’s encouraging that the first sediment results did not show presence of arsenic, mercury or cadmium, toxic elements found in mine rock or used in mine processing.

A comparison sample of compact sediment from the mouth of nearby Raft Creek, not affected by the Aug. 4 tailings pond breach, also tested above sediment quality guidelines for iron. The environment ministry says mineral deposits that attract mine development often have naturally occurring metal concentrations much higher than other areas.

“What we need to do is test those sediments to determine whether it’s better environmentally to leave them there or to try to collect them and get them out of the creek bed and get them out of the creek mouth in Quesnel Lake,” Bennett said. “Before you start dredging lake bottoms and trying to clean up the bottom of a creek bed to get the sand out, you’ve got to determine what the risk is first, and that’s the phase that we’re in right now.”

There are two priority jobs underway on the spill site. One is pumping down the level of Polley Lake, the smaller lake next to the mine site that received a surge of water and tailings that plugged the outlet with an elevated water level. The other is reconstructing the breached section of the dam to prevent rain from carrying more tailings from the pond.

Interior Health is reviewing water and sediment sample results and a long-term monitoring and remediation plan has been submitted by the mine operator, a division of Imperial Metals.

 

Just Posted

Mixed-use density proposed for Oak Bay Avenue

Parking prioritized despite proximity to amenities

WATCH: Marine security company posts live seal cam at Oak Bay Marina

Seals tend to loiter near the fish-cleaning table

Victoria woman experiencing homelessness wants systematic changes as she faces losing her truck

Willi Boepple fears losing one of her last possessions after being inundated with parking tickets

UPDATED: Two-sailing wait at BC Ferries Swartz Bay terminal

Passengers destined for Tsawwassen without a reservation should allow for extra time at terminal

Greek Fest brings taste of Mediterranean to Victoria

Annual celebration offers 15 music groups, folk dances and mouth-watering cuisine

WATCH: Family dog missing after fire tears through Metchosin home

Firefighters continue to monitor for hot spots

Victoria Shamrocks open WLA finals at Q Centre in Colwood

Team is evenly matched in championship series against Maple Ridge Burrards

‘Easy Rider’ star Peter Fonda dies at 79

Actor and writer was nominated for an Oscar for co-writing the 1969 psychedelic road trip movie

Excavators help cute kid who copied their dig with his toys stay “safe at work”

Carson Carnegie wakes up at 7:00 am every morning to watch construction work on his street

Bob Lenarduzzi out as Vancouver Whitecaps president

MLS team is at the bottom of the Western Conference standings

B.C. daycare operator denies negligence in death of ‘Baby Mac’

Infant died in early 2017 after biting an electrical cord, according to a lawsuit filed by his mom

BC SPCA reopens animal cruelty investigation at Abbotsford pig farm

Additional alleged footage released from Excelsior Hog Farm sparks new investigation

RCMP on Vancouver Island seek information on alleged ‘breaking out’ bandit

Man alleged to have hid in Nanaimo business washroom ceiling overnight, took monitors

Greater Victoria wanted list for the week of Aug. 13

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

Most Read