The larger issue here is the continuing investment in fossil-fuel infrastructure.  We should be spending money to build smart grids to integrate wind and solar; to develop grid-scale storage through large battery, pumped hydro and hydrogen facilities; to speed the introduction of electric vehicles etc.  Oil pipelines are so 20th century.  The danger to the water supply from the pipeline is one thing, the danger to the planet from continuing to emit greenhouse gases by burning the fuel that will flow through the pipeline is of a different order of magnitude.  As the Trump administration tries to ramp up fossil-fuel use we will have to engage in protests on a much larger scale.