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

B.C. premier talks forestry, service needs with handful of northern mayors in Prince George

Prince George meeting completes premier’s tour of Kitimat, Terrace, Fort St. James and Quesnel

Indigenous LNG supporters chide human rights advocates over pipeline comments

Coastal GasLink has signed agreements with 20 elected First Nation councils along the pipeline’s 670-kilometre path

Houston heads to Burns Lake for hockey

Burns Lake hosted a initiation one day hockey tournament on Jan. 18.… Continue reading

Home sales increase in Houston

Sale prices also increase in the communities

Council to push for high school driver education

Says it will aid in finding employment

VIDEO: Trudeau insists Iran respect families’ wishes when it comes to burials

All 176 people on board the Ukraine International Airlines flight PS752 were killed

Dog reunited with Tofino owner, months after being taken from beach

Shannon Boothman ‘ecstatic’ at pet’s return after a tip leads to social media search

B.C.’s first ride-hailing app to launch in Tofino, Whistler in February

The Whistle! app will be available in Tofino on Feb.1 and in Whistler Feb. 6.

Councillor resigns in Revelstoke after colleagues approved 67% raise

Council approved a 134 per cent raise for the mayor of Revelstoke

Rolled-over dairy truck in Abbotsford lost 40,000 litres of milk

Truck removed Sunday, Jan. 19, with specialized equipment to upright vehicle

Boy, 13, arrested after alleged assault involving girl at B.C. middle school

Boy alleged to have used ‘inappropriate levels of force’ to injure the girl

B.C. asks health-care staff to be ‘vigilant’ when screening for coronavirus

This comes after U.S. health officials confirmed a case of the virus in Washington State

B.C. player becomes only second Canadian to enter Hall of Fame of Baseball

Walker received 76.6 percent of the Baseball Writers of America Association vote

PHOTOS: Heavy snowfall breaks window, causing avalanche into B.C. newsroom office

It was a chaotic start to the week for the Kitimat Northern Sentinel

Most Read