PORTLAND, Ore., Dec. 30, 2019 (GLOBE NEWSWIRE) -- Northwest Natural Gas Company, dba NW Natural, a wholly owned subsidiary of Northwest Natural Holding Company (NYSE: NWN), today filed for a general rate increase with the Public Utility Commission of Oregon (OPUC). The filing would result in a net revenue increase of $71.4 million to recover costs associated with investments to strengthen and reinforce the natural gas system, provide necessary system maintenance and operational resiliency, and technology upgrades. If approved as filed, the typical residential customer using 53 therms per month would see an average monthly bill increase of about $6.43. A commercial customer using 242 therms a month would see an average monthly bill increase of about $25.40. "The proposed rate adjustment is necessary to align customer rates with the cost of providing reliable, safe and efficient service," said David H. Anderson, president and CEO of NW Natural.