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

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

Olympic athlete sends shout-out to Cawston Primary students

Canadian Olympic sprinter Khamica Bingham particpated in one of the school’s long-time traditions

Penticton Search and Rescue respond to six calls in less than a week

Two hikers rescued in early morning search near Greyback Lake latest in series of searches

In photos: Modified, yet traditional graduation gives Penticton graduates a sense of normalcy

Students around Penticton take part in pre-recorded graduation ceremonies

Penticton RCMP arrest man found ‘unlawfully in home’

Police are asking anyone with information to contact them

‘It’s about equality’ says Penticton man rallying for Black Lives Matter

“Canada is not exempt from racism and oppression,” said Geoff Stathers, standing with his #BLM sign

MAP: Dr. Henry reveals which B.C. regions have seen most COVID-19 cases

B.C. health officials release a first look at how the novel coronavirus has reached all corners of the province

Limit gun capacity to five bullets, victims group urges Trudeau government

Current limits are generally five bullets for hunting rifles and shotguns and 10 for handguns.

Vancouver Island’s current COVID-19 case count officially hits zero

Of the 130 recorded Island Health cases, five people have died, 125 recovered

COVID-19: Closed B.C. businesses allowed to sell liquor stock

Sales allowed to other licensees that can reopen

Trudeau to offer premiers billions to help reopen the economy safely

Making a difference in municipalities is a pricey proposition

Vancouver Island First Nations gather to remember woman fatally shot by police

Nuu-chah-nulth Tribal Council requests an independent investigation

Police seek help identifying person of interest in Salmon Arm arson investigation

A fire in a garage was extinguished but it is being treated as an arson.

Regional District of Kootenay Boundary rescinds all Grand Forks-area evacuation orders

Evacuation alerts for 1,136 Boundary properties remain in effect as officials monitor forecasts

Filming to resume safely later in June: Okanagan Film Commission

Film commissioner Jon Summerland said they want to start filming again later in June

Most Read