Summary: Revises Tariff WN U-29, Schedule 175 - Decoupling Mechanism - Natural Gas. The estimated annual revenue change associated with this filing is an increase of approximately $3.2 million. Residential customers taking service on Schedule 101 using an average of 67 therms would see their bills decrease from $98.99 to $96.77, a decrease of $2.22 or 2.24 percent.