VIDEO: Demolition crew topples defunct surge tower at B.C. hydroelectric project

Towers were in operation from 1947 to 2018, and protected 1.8-km long penstocks

And then there were two…

The contractor for BC Hydro’s John Hart Generating Station project in Campbell River successfully felled one of three historic surge towers Friday morning.

“At about 10:20 am, we detonated precise explosives attached to some of the base girders of the tower so it directionally fell as planned, similar to a large tree, up the penstock corridor,” said BC Hydro spokesperson Stephen Watson.

The demolition was part of the approximately $1 billion John Hart Generating Station Replacement Project which moved generating facilities underground to make them seismically safer. Currently, the old above-ground structures are being removed.

A 450-metre safety closure radius was put in place around the surge towers, so the two access roads into the site and the surrounding public trails were closed off for the controlled blast event. The contractor InPower BC, with FMI/ASL-JV and subcontractor Pacific Blasting and Demolition leading the actual surge tower removal, obtained a blast permit from the City of Campbell River. People near the site may have heard the blast and wondered what the sound was from.

For the felling process, some of the eight supporting legs of the tower were cut using linear shape charges, with kicker charges used to ensure full metal separation and displacement.

“We will now remove the felled surge tower, with the steel to be recycled,” Watson said. “The second tower may be felled sometime next week.”

The third (south) tower, while not part of the new hydroelectric facilities, is in good condition and will stay in place given it has communications equipment and is a visual aid to the local airport. There is also the heritage value in keeping one tower in place, Watson said.

At 90 metres or 295 feet tall, for a period of time the surge towers were the highest structures on Vancouver Island. The iconic white towers are visible from certain areas of Campbell River, including from boats on the ocean.

They were in operation from 1947 to 2018, and protected the 1.8-km long penstocks that led from the dam to the generating station from short duration water pressure changes that occur when the flow velocity is increased or decreased. They do this by allowing the water to go up, or conversely come down. The surge tanks were half-filled with water and at the same elevation as the upstream John Hart Reservoir.

The old John Hart facility was officially shut down last fall and replaced with a new and improved underground hydroelectric facility. The old facility is being removed.

RELATED: Water to be diverted from generating station tunnels to Elk Falls Canyon

RELATED: Campbell River’s Canyon View Trail loop to be opened up by end of summer


@AlstrT
editor@campbellrivermirror.com

Like us on Facebook and follow us on Twitter

Just Posted

West Shore resident, local officer encourages women to take control of their safety

Kris Greffard is posting short videos with safety tips for women using local trails and parks

Police and Indigenous communities pull together in 10-day canoe journey

Victoria Police Department, Ministry of Children and Family Development took part in Pulling Together Canoe Journey

Point Ellice House exhibit offers new lens into colonial history

The new ‘Politics of luxury’ display studies the wealthy O’Reilly family from several angles

Nearly a dozen coonhound puppies and their mother to reunite at Saanich park

Dogs’ former foster family initiated one-year reunion plans

Trio brings roller skating fever to Greater Victoria

Roller Skate Victoria offers workshops, summer camps and more

Rich the Vegan scoots across Canada for the animals

Rich Adams is riding his push scooter across Canada to bring awareness to the dog meat trade in Asia

How much do you know about the moon?

To mark the 50th anniversary of the first lunar landing, see how well you know space

POLL: Do you carry reusable shopping bags?

While a court ruling determined the City of Victoria’s plastic bag ban… Continue reading

Greater Victoria wanted list for the week of July 16

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

Body, burning truck found near northern B.C. town

RCMP unsure if the two separate discoveries are related

Couple found dead along northern B.C. highway in double homicide

Woman from the U.S. and man from Australia found dead near Liard Hot Springs

UPDATE: West Kelowna fawn euthanized, not claimed by sanctuary

Gilbert the deer has been euthanized after a suitable home was not found in time

BC Wildfire Service warns wet weather no reason to be complacent

Fire risk currently low for much of B.C. compared to same time over last two years.

Bank of Canada lowers qualifying rate used in mortgage stress tests

Home sales softened last year after the federal government introduced new stress test rules for uninsured mortgages

Most Read