Summary: Revises Tariff WN U-29, Schedule 191, reflecting changes to natural gas rates under the conservation rider mechanism from 2016 actual and 2017 budget expenditures. The proposed filing would bring the conservation rider balance to zero by July 31, 2019, and decrease rates by approximately $2.0 million (1.3 percent). If allowed to go into effect, the average residential natural gas customer would see a monthly bill decrease of $0.82.