Dominion Resources ( NYSE: D ) and Questar Corp. (NYSE: STR) said their proposed merger cleared a key condition needed to complete the deal. The Federal Trade Commission granted early termination of the 30-day waiting period under the Hart-Scott-Rodino Antitrust Improvements Act in regard to the merger. Questar's shareholders must still approve the deal for it to be finalized. Questar and Dominion will also file for review and approval, if required, from the Utah Public Service Commission and the Wyoming Public Service Commission and provide information regarding the deal to the Idaho Public Utilities Commission. Dominion announced earlier this month that it would acquire Utah-based Questar, a natural gas distribution, pipeline, storage and cost-of-service gas supply company, for $4.4 billion in cash. The deal is expected to close in 2016.