MidAmerican Energy Company - Page 5




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            schedules and procedures are approved by the regulatory agencies,                          
            the PGA mechanism allows petitioner to recognize fluctuations in                           
            gas costs quickly and to incorporate those changes in its                                  
            customers’ bills without formal rate-setting procedures.                                   
            Accordingly, petitioner can recover its gas costs on a timely                              
            basis throughout the year.                                                                 
                  The period that the PGA mechanism covers runs from                                   
            September 1 of the first year to August 31 of the following year                           
            (the PGA year).  As part of the PGA mechanism, certain                                     
            disclosures are required throughout the year, including an annual                          
            PGA filing, monthly PGA filings, and an annual PGA reconciliation                          
            filing.  The annual PGA filing is made prior to August 1 of each                           
            year and estimates anticipated sales and expenses for the                                  
            upcoming PGA year.  In the annual PGA filing, projected gas costs                          
            are established and incorporated into the approved tariff rates.                           
            This projection is based on gas actually used and actually billed                          
            during the previous year with adjustments for weather                                      
            normalization.                                                                             
                  Periodic PGA filings are made throughout the calendar year                           
            at the end of each calendar month to adjust the billing rate to                            
            reflect near-concurrent gas costs, as the price of gas                                     
            fluctuates.  Accordingly, each month, rates that are set forth in                          
            the annual PGA filing are increased or decreased without normal                            
            rate-setting procedures by a pricing adjustment factor (PGA                                






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Last modified: May 25, 2011