Once the tallest structure in the world, Sudbury landmark to be dismantled piece by piece
The Superstack is 381 metres (or 1,250 feet) high, 35 metres wide at the base and 16 metres wide at the top. It is the second tallest chimney in the world, exceeded only by a power station chimney in Kazakhstan.
Dismantling of the famous Superstack in Sudbury will begin in August.
While many are sad to see it go, Vale Base Metals said it's an important step forward in its environmental stewardship program.
Superstack 1972
When completed in 1972, the Superstack was the tallest structure in the world. It dispersed emissions from mining, a critical step in improving Sudbury's heavily damaged environmental landscape, which used to be dominated by black rock.
(Photo from video)
The Superstack is 381 metres (or 1,250 feet) high, 35 metres wide at the base and 16 metres wide at the top. It is the second-tallest chimney in the world, exceeded only by a power station chimney in Kazakhstan.
When it was completed in 1972, it was the tallest structure in the world. It dispersed emissions from mining, a critical step in improving Sudbury's heavily damaged environmental landscape, which used to be dominated by black rock.
More recently, however, Vale's $1 billion Clean AER Project led to the elimination of 100,000 metric tonnes of sulfur dioxide emissions each year (equivalent to 1,000 railway tanker cars of sulphuric acid), bringing emissions down to 30 per cent below the provincial standards.
Superstack CleanAER
Vale's $1 billion Clean AER Project led to the elimination of 100,000 metric tonnes of sulfur dioxide emissions each year (equivalent to 1,000 railway tanker cars of sulphuric acid), bringing emissions down to 30 per cent below the provincial standards.
(Photo from video)
That meant the stack was no longer needed.
Paul Guenette is the project lead for the Superstack demolition project, a process that began in 2020 when Vale decommissioned the stack and began planning how to take it down.
Since then, elevators have been built on the side to bring workers up and down. For the last two months, workers have been building a platform at the top.
'It's 95 per cent completed,' Guenette said.
'Probably in mid-July, we're going to see … the actual machine that's going to be doing the dismantling being set right on top of the rim.'
Superstack dismantle
The special equipment Vale will use to dismantle the superstack is like a jackhammer that will cut away panels.
(Photo from video)
He said the machine is like a jackhammer that will be 'cutting away panels in the stack and making them fall down on the inside.'
Rubble will be removed as it accumulates inside the stack using a remotely controlled loader similar to what's being used underground.
'Again, (it's) super exciting piece that we're utilizing technology from underground to the above-ground, doing this monumental project,' Guenette said.
Work will begin within weeks, but the process itself will take three or four years, he added.
'It's a lot of work, a lot of hours,' Guenette said.
'We have to respect all the bylaws, obviously, for the noise and other things just to make sure everybody's happy.'
Work has to stop in winter because of the cold and extreme winds. He said that the water sprayer they use to control dust wouldn't work in winter because the water would freeze.
'That's why it's really going to take quite some time,' Guenette said.
Vale hired Commonwealth Dynamics Canada, an external contractor, to help with the demolition and also has a team of about 27 employees working on the project.
For people like Erin Newell, the Superstack has been a constant in her life. Newell's family has lived in Copper Cliff for 90 years.
Superstack 4
While many are sad to see the Superstack go, Vale Base Metals said it's an important step forward in its environmental stewardship program.
(Photo from video)
'My grandparents came here from Toronto, and they were down on Peter Street, where they raised nine children and there's still quite a few of us in town,' she said.
'I grew up on Crighton Road across from the park and I've lived on this street beside my sister for about 12 years.'
Newell said the stack has always been a compass for her. 'Coming back from camp or a trip, you would always know that you were close to home (when) you started to see that in the skyline,' she said.
'It's going to be very different'
'And I think it's going to be very different now that it's not here. Definitely, a big piece of history that's always been a part of my life.'
As the demolition moves closer to reality, Guenette said he knows it's bittersweet for many in the community.
'The stack, for certain generations of people, it was a sign of prosperity, right?' he said.
'You see smoke coming out of the stack, that means Inco or Vale, it was making money. People were working. We'd be able to put food on the table.'
But the fact that it's no longer needed is a good thing since it means that emissions from mining have been drastically reduced.
'Look at Sudbury now -- it's completely green,' Guenette said.
'Thirty years ago, you wouldn't recognize this place. So there's two sides to it, I understand, but it's time to turn the new page as far as Sudbury and really showing the world that we care about the environment and we want to improve the world.'
In addition to the Superstack, Vale is also taking down the less-famous Copperstack. Guenette said there are about 95 feet left to be dismantled.
As for the Superstack, residents are being encouraged to share photos and memories of the stack while to company works towards creating a monument.
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Globe and Mail
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To view an enhanced version of this graphic, please visit: QA/QC Procedures Samples are submitted to American Assay Laboratories (AAL) of Sparks, Nevada, which is a certified and accredited laboratory, independent of the Company. Independent check samples are sent to Paragon Geochemical Labs (PAL) of Sparks, Nevada. Samples are prepared using industry-standard prep methods and analysed using FA-PB30-ICP (Au; 30g fire assay) and ICP-5AM48 (48 element Suite; 0.5g 5-acid digestion/ICP-MS) methods. AAL also undertakes its own internal coarse and pulp duplicate analysis to ensure proper sample preparation and equipment calibration. Ridgeline's QA/QC program includes regular insertion of CRM standards, duplicates, and blanks into the sample stream with a stringent review of all results completed by the Company's Qualified Person, Michael T. Harp, Vice President, Exploration. The technical information contained in this news release has been prepared under the supervision of, and approved by Michael T. Harp, CPG, the Company's Vice President, Exploration. Mr. Harp is a "qualified person" as defined under National Instrument 43-101 - Standards of Disclosure for Mineral Projects. Selena Project Selena is located in White Pine County, Nevada, approximately 64 kilometers ("km") north of the town of Ely, NV. The Project is currently being operated by Ridgeline under Phase 1 of an earn-in agreement with a wholly owned subsidiary of South32 Limited ("South32") and shares a property boundary with the Butte Valley project, a $33M earn-in agreement between Freeport-McMoRan and the underlying owner, Falcon Butte Minerals. The Project is comprised of 39 square kilometers of highly prospective exploration ground including Ridgeline's shallow-oxide Ag-Au ± Pb-Zn Chinchilla Oxide and deeper Chinchilla Sulfide discoveries. Subsequent drilling has continued to highlight the potential for high-grade CRD type mineralization (Ag-Au-Pb-Zn ±Cu-W) between Chinchilla Oxide and Freeport-McMoRan's Butte Valley Cu-Au-Ag-Zn porphyry located directly west of the property (View the Selena VRIFY Deck Here). For additional information regarding the South32 earn-in agreement terms, view the August 22, 2024 news release HERE. About Ridgeline Minerals Corp. Ridgeline Minerals is a discovery focused precious and base metal explorer with a proven management team and a 200 km 2 exploration portfolio across seven projects in Nevada, USA. The Company is a hybrid explorer with a mix of 100%-owned exploration assets (Big Blue, Atlas, Bell Creek & Coyote) as well as two earn-in exploration agreements with Nevada Gold Mines at its Swift and Black Ridge projects and a third earn-in with South32 at its Selena project. More information about Ridgeline can be found at On behalf of the Board "Chad Peters" President & CEO Further Information: Chad Peters, President, CEO & Director Ridgeline Minerals Corp. +1 775 304 9773 cpeters@ Neither the TSX Venture Exchange nor its Regulation Service Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this press release Cautionary Note regarding Forward-Looking Statements Statements contained in this press release that are not historical facts are "forward-looking information" or "forward-looking statements" (collectively, "Forward-Looking Information") within the meaning of applicable Canadian securities legislation and the United States Private Securities Litigation Reform Act of 1995. Forward-Looking Information includes, but is not limited to, the anticipated benefits of the Earn-In Agreement and the transaction contemplated thereby. The words "potential", "anticipate", "meaningful", "discovery", "forecast", "believe", "estimate", "expect", "may", "will", "project", "plan", "historical", "historic" and similar expressions are intended to be among the statements that identify Forward-Looking Information. Forward-Looking Information involves known and unknown risks, uncertainties and other factors which may cause the actual results to be materially different from any future results expressed or implied by the Forward-Looking Information. In preparing the Forward-Looking Information in this news release, Ridgeline has applied several material assumptions, including, but not limited to, assumptions that TSX Venture Exchange approval will be granted in a timely manner subject only to standard conditions; the current objectives concerning the Project can be achieved and that its other corporate activities will proceed as expected; that general business and economic conditions will not change in a materially adverse manner; and that all requisite information will be available in a timely manner. Forward-Looking Information involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance, or achievements of Ridgeline to be materially different from any future results, performance or achievements expressed or implied by the Forward-Looking Information. Such risks and other factors include, among others, risks related to dependence on key personnel; risks related to unforeseen delays; risks related to historical data that has not been verified by the Company; as well as those factors discussed in Ridgeline's public disclosure record. Although Ridgeline has attempted to identify important factors that could affect Ridgeline and may cause actual actions, events, or results to differ materially from those described in Forward-Looking Information, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that Forward-Looking Information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on Forward-Looking Information. Except as required by law, Ridgeline does not assume any obligation to release publicly any revisions to Forward-Looking Information contained in this news release to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.
