Summary: Revises Tariff WN U-28, Schedule 91, reflecting changes to rates under the electric conservation rider mechanism from 2017 actual and 2018 budget expenditures. The proposed filing increases rates by $5.3 million or 0.9 percent, bringing the forecasted tariff balance close to $0 by July 31, 2020. If allowed to go into effect, the average electric residential customer would see a monthly bill increase of $0.84.