British Columbia on Wednesday gave the green light to Kinder Morgan Inc's plan to nearly triple its Trans Mountain oil pipeline, which runs from Canada's oil sands through the province to a marine terminal on the Pacific Coast.

British Columbia Premier Christy Clark said in a statement the C$6.8 billion ($5.16 billion) project had satisfied or was close to satisfying the five conditions she laid out in 2012 for any company wanting to build pipelines in the province. The Canadian government in November approved Kinder Morgan’s proposal to…