Summary: Revises Tariff WN U-3, Schedules 592, Cascade Arrearage Relief and Energy Savings Program Cost Recovery, and 593, Washington Energy Assistance Fund Program Cost Recovery, to true-up and forecast costs for its low-income assistance. This filing reduces overall revenue by $3.67 million, or 0.98 percent. A residential customer with average monthly usage of 54 therms would see a decrease of $0.54 per month, or approximately 0.58 percent.