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Exhibit A to Settlemeat Agreement <br />Attachment A to Ordinance <br />ATMOS ENERGY CORPORATION <br />MID-TEX DIVISION <br />RIDER: <br />WNA - WEATHER NORMALIZATION ADJUSTMENT <br />APPLICABLE TO: <br />All Cities except the City of Dallas and all unincorporated areas _ <br />~ <br />EFFECTIVE DATE: <br />Biils Rendered on or after 10101/2010 <br />7 <br />E <br />Provisions far Adiustment <br />The base rate per Mcf (1,400,000 Btu) for gas service set forth in any Rate Schedules utilized by the <br />cities of the Mid-Tex Division service area for determining normalized winter period revenues shall be <br />adjusted by an amount hereinafter described, which amount is referred to as the "Weather Normalization <br />Adjustment." The Weather Normalization Adjustment shall apply to all temperature sensitive residential <br />and commercial bills based on meters read during the revenue months of Novernber through April. The <br />five regional weather stations are Abilene, Austin, Dallas, Waco, and Wichita Falls. <br />Computation of Weather Normalizafion Adiustment <br />The Weather Normalization Adjustment Factor shall be computed to the nearest one-hundredth cent <br />per Mcf by the following formula: <br />(HSFi x (NDD-ADD) ) <br />WNAFi = Ri <br />(gLi + (HSFi x ADD) ) <br />Where <br />i = any particular Rate Schedule or billing classification within any such <br />particular Rate Schedule that contains more than one billing classification <br />WNAF, = Weather Normalization Adjustment Factor for the ith rate schedule or <br />classification expressed in cents per Mcf <br />Ri = <br />base rate of temperature sensitive sales for the ith schedule or <br />classification approved by the entity exercising original jurisdiction. <br />HSFi = <br />heat sensitive factor for the ith schedula or classification calculated as the <br />slope of the linear regression of average sales per bill (Mc~ and actual <br />heating degree days by month for the test year by schedule or classification <br />and weather station as part of the RRM filing. <br />NDD = <br />billing cycle normal heating degree days calculated as the simple ten-year <br />average of actual heating degree days. <br />ADD = <br />billing cycle actual heating degree days. <br />gli = <br />base load sales for the ith schedule or classification calculated as the y- <br />ession of average sales per bill (Mcf) and actual <br />intercept of the linear regr <br />heating degree days by month for the test year by schedule or classification <br />and weather station as part of the RRM filing. <br />The Weather Normalization Adjustment for the jth customer in ith rate schedule is computed as: <br />WNA; = WNAF; x q;j <br />