My answer won't differ from the one I already gave you. The National Energy Board is responsible for assessing a pipeline's entire route, whether it crosses waterways or simply runs underground. We think that it is important for an integrated assessment to be carried out in such cases. Transport Canada is always ready to give its opinion if the National Energy Board asks for it. That said, the board controls the process.
On October 4th, 2016. See this statement in context.