Minnesota regulators have ordered Enbridge to pay more than $3 million US for allegedly violating state environmental law by piercing a groundwater aquifer during construction of the Line 3 oil pipeline replacement. The state Department of Natural Resources said Enbridge, while working near Clearbrook in January, dug too deeply into the ground and pierced an artesian aquifer, which resulted in a 90-million litres groundwater leak. "Enbridge's actions are a clear violation of state law, and also of the public trust," said Barb Naramore, DNR deputy commissioner. "That is why we are using all of the tools in our authority to address the situation."