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

Metal theft attempt in Nanaimo damages fire hydrant

Nanaimo RCMP hope public can help identify suspect

VIU theatre department debuts instructor’s original new musical, ‘SlugFest’

Writer and director Ross Desprez created the musical with his students

Parties make last push to try to win Nanaimo-Ladysmith riding

Greens, Conservatives, NDP and other parties focus on getting out the vote Oct. 21

One person hurt in crash at busy Nanaimo intersection

Minivan, sport utility vehicle collide at old Island Highway, Bowen Road and Norwell Drive

UPDATE: Man who was missing has been located

Search and rescue teams, RCMP were involved in search in south Nanaimo

ELECTION 2019: Have Justin Trudeau’s Liberals really cut middle-class taxes?

Conservative Andrew Scheer vows to cut bottom bracket, NDP’s Jagmeet Singh targets wealth tax

British family deported after ‘accidental’ U.S. border crossing

U.S. officials deny it was mistake, release video of vehicle crossing into Washington from Langley

LETTERS: Wolf kills, wilderness protection and caribou recovery

Readers respond to Tom Fletcher’s column on B.C. program

Kamloops man hangs on to back of stolen truck as suspect speeds away, crashes

The pickup truck was seen leaving the roadway before bursting into flames

Everything you need to know before getting the flu shot

Island pharmacist shares concerns, recommendations before flu season hits

‘Sky didn’t fall:’ Police, lawyers still adjusting after pot legalization

Statistics Canada says 541 people were charged under the federal Cannabis Act between Oct. 17, 2018 and the end of the year

Fewer people prescribed opioids in B.C., but other provinces lack data: doctors

Patients who began taking opioids were prescribed smaller doses for shorter duration

Electric cello, stolen from vehicle in Williams Lake, returned to U.S. owner

Rita Rice of Texas said she and her husband had given up hope of ever seeing it again

Vancouver Island’s West Coast going wild about cycling

Ongoing project will tie Tofino and Ucluelet together with a paved cycling trail

Most Read