Summary: Revises Tariff WN U-29, Schedule 175, Decoupling Mechanism – Natural Gas, to amortize the balance in the decoupling deferral account. The company requests an increase of $4.3 million, 2.9 percent of total revenue. If granted, a residential customer using an average 65 therms will pay $1.72 more per month, a 3 percent increase.