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

Fuel Management is a priority for 100 Mile Community Forest

The organization is pioneering the use of a normal cutting permit process to create fuel breaks

CRD develops internal policy for single-use plastics for its own operations

Chair Margo Wagner said the CRD is proud to be taking steps to reduces its environmental footprint

Chief calls for state of emergency and fishery closure in light of Big Bar slide in Fraser River

Chief Robbins said his own community of Esket will not fish until the slide is dealt with

Update: Severe thunderstorm watch upgraded to warning for Cariboo North including Quesnel

Potential for strong wind gusts, large hail and heavy rain in the afternoon

Rents in most Canadian cities are unaffordable for lower-income earners: study

Roughly one-third of households, or 4.7 million, are renters

B.C. mom to go to Europe court in hopes of getting alleged abducted daughter back

Tasha Brown alleges her estranged wife abducted their daughter Kaydance Etchells in 2016

‘Benzos’ and fentanyl a deadly cocktail causing a growing concern on B.C. streets

Overdoses caused by benzodiazepines can’t be reversed with opioid-overdose antidote naloxone

Scheer on Trump: It’s ‘offensive’ to question the family background of critics

Trump is being called a racist for saying that the four congresswomen should go back where they came from

Instagram expands Canadian pilot removing ‘like’ counts to more countries

Social media giant plans to roll out the test in Australia, New Zealand, Brazil, Japan, Italy and Ireland

Pamela Anderson adds star power to B.C. Green Party town hall

Celebrity attended Nanaimo meeting with representatives from U.S.-based environmental group

Olympic softball qualifier gets $150K boost from provincial government

2019 Americas Qualifier to be held in Surrey from Aug. 25-Sept. 1

Gas price inquiry questions Trans Mountain capacity, company denies collusion

The first of up to four days of oral hearings in the inquiry continue in Vancouver

Will you be celebrating national hotdog day with any of these crazy flavours?

The popularity of hotdogs spans generations, cultures

Most Read