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PDFWAC 480-85-010


(1) The purpose of these rules is to establish minimum filing requirements for any cost of service study filed with the commission. These rules are designed to streamline, improve, and promote efficiency in analyzing rate cases, clarity of presentation, and ease of understanding. The minimum filing requirements will allow for comparisons of cost of service studies.
(2) The cost of service study is one factor among many the commission considers when determining rate spread and rate design. The commission may also consider, as appropriate, such factors as fairness, perceptions of equity, economic conditions in the service territory, gradualism, and rate stability.
[Statutory Authority: RCW 80.01.040, 80.04.160 and chapter 80.28 RCW. WSR 20-15-024 (Docket UE-170002 and UG-170003, General Order R-599), ยง 480-85-010, filed 7/7/20, effective 8/7/20.]
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