NWT industry minister supports Mackenzie Valley pipeline 13-May-11 Bob McLeod said the Mackenzie Gas Project would translate to billions of dollars for the NWT and Canadian economy, calling it a “nation building endeavour.” (And a few $$$ for us investors would be sweet) The National Energy Board has ruled that the proponents of the Mackenzie Gas Project, led by Imperial Oil, must decide by 2013 whether it's economically feasible to build the pipeline, and construction must begin by 2015.