The plan proposes a complicated set of wells and pumps to control and monitor water levels and chemistry. But its centrepiece is a wall, nearly 14 kilometres long and between 20 and 70 metres deep, which is intended to protect the unmined wetland while the rest is drained and excavated.
Harris, who wrote the report with Kelly Biagi of Brock University, said the plan from Fort Hills also threatens the wetland’s delicate water chemistry. She said she has calculated that the entire McClelland complex stores the equivalent of between eight million and 35 million tonnes of carbon dioxide. The entire amount of carbon dioxide sequestered in Alberta’s carbon capture and storage programs since 2015 is 10.5 million tonnes.
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