Over 80 percent of the outstanding shares voted, with 96.6 percent approving the merger. The companies announced the merger on February 1. The Federal Trade Commission on Feb. 23 granted early termination of the 30-day waiting period under the federal Hart-Scott-Rodino Antitrust Improvements Act.
The Public Service Commissions of Utah and Wyoming must approve the deal before it is completed. The companies expect the transaction to close by the end of 2016.