ST. PAUL, Minn. (AP) — Minnesota utility regulators have granted a final green light to Enbridge Energy’s proposed Line 3 crude oil pipeline replacement.

The Public Utilities Commission on Tuesday unanimously rejected the last pending petitions for reconsideration, including one from the state Commerce Department.

The Commerce Department had joined with tribal and environmental groups in challenging the project’s approvals before the Minnesota Court of Appeals, which sent the case back to the commission for procedural reasons last month.

Gov. Tim Walz says his administration will study Tuesday’s decision before deciding its next steps.

Line 3 has carried Canadian crude across northern Minnesota since the 1960s and is showing its age. Besides clearing the legal challenges, Calgary-based Enbridge also needs state and federal permits, which the company hopes to secure around end of the year.

(© Copyright 2019 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)