Summary: Revises Tariff WN U-6, to remove temporary adjustments that were placed into rates effective November 1, 2014 and to apply proposed temporary adjustments identified in the Company’s filings NWN WUTC Advice No. 15-6, 15-7, and 15-8, respectively, and the application of the proposed Annual WACOG and demand charges identified in NWN WUTC Advice No. 15-8, to customer rates. The net effect is an annual revenue reduction of $11,906,405 (16.25 percent). If granted, the average residential customer bill of 58 therms per month will decrease by $9.46.