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HomeMy WebLinkAbout20040220Hessing Direct.pdfRECEIVED 2004 February 20 PM 4:59 IDAHO PUBLIC UTILITIES COMMISSION BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION IN THE MATTER OF THE APPLICATION OF IDAHO POWER COMPANY FOR AUTHORITY TO INCREASE ITS INTERIM AND BASE RATES AND CHARGES FOR ELECTRIC SERVICE. ) CASE NO. IPC-O3- DIRECT TESTIMONY OF KEITH HESSING IDAHO PUBLIC UTILITIES COMMISSION FEBRUARY 20, 2004 Please state your name and business address for the record. My name is Keith D. Hess and my business address is 472 West Washington street, Boise, Idaho. By whom are you emplo and in what capacity? I am employed the Idaho Public utili ties Commission as a Public utili ties Engineer. What 1S your educational and experience background? I am a Registered Professional er in the state of Idaho.I received a Bachelor of Science Degree in Civil ring from the Uni versi ty of Idaho in 1974.Since then, I have worked six years with the Idaho Department of Water Resources, and two years with Morrison-Knudsen.I have been cont ly emplo the Commission since August 1983. As a member of the Commission Staff, my primary areas of responsibility have been electric utility power supply, revenue allocation and rate design. What is the purpose of your test in thi proceeding? My test addresses Jur isdict Separations, Class Cost of Service, some Power Cost Adjustment components and cloud seeding. Please summar1ze your test CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff I recommend that the Commission the 12 coincident peak (12CP) Jurisdictional Separation Methodology proposed the Company to allocate costs to the Idaho jurisdiction.This method applied to Staff' total Company Revenue Requirement results in an Idaho Jurisdictional Revenue Requirement of $498,758,249, which requires an average 3.06 percent rate 1ncrease to recover an additional $14,796,880 revenue requirement. Staff accepts the weighted 12 coincident peak (W 2CP) methodology proposed by the Company for the purpose of allocat costs to the Company s Idaho customer classes.Staff witness David Schunke proposes some non-cost based modifications to these cost of service results that become Staff's revenue allocation proposal. I review the Company s Power Cost Adj us tment ca culations that change as a result of a general rate case.Staff recommends that the Commission accept the Company s proposed changes for the changes to the Expense Adjustment Rate for Growth.The Company proposes that the rate used to adj ust actual power supply costs to remove the costs of load be the embedded cost of power supply which is 7.30 $/MWh.I propose that these changes from normal power supply costs occur at the cost of power supply and, therefore, the CASE NO. IPC-03-02/20/04 (Di)HESSING , K.Staff marginal cost rate of 29.41 $/MWh should be used in the calculation. Finally, my testimony scusses the Company cloud se program 1nc its effects on the PCA. I propose that there are questions regarding the program tha t remain unanswered and that need to be answered before the Commission can decide whether or not to accept the costs include in this case.My testimony includes some of those questions. JURISDICTIONAL SEPARATIONS What are Jurisdictional S ions? I t is the process used to divide Idaho Power Company s annual costs among the j ur isdictions it serves. In general the process identifies the Company s costs as related to the supply of energy, peak demand, or the number of customers.The costs are then divided to the Idaho, Oregon or Federal Energy Regulatory Commission (FERC) Jurisdictions based on each jurisdiction proportional amount of each of these items.The FERC Jurisdiction consists of wholesale sales to other utilities.The Jurisdictional Separation process results in the Idaho Revenue Requirement, which is the amount of the Company s total normal annual Revenue Requirement that is caused by Idaho ratepayers and that must be recovered from Idaho ratepayers. CASE NO. IPC-03-02/20/04 (Di)HESSING , K.Staff Wha t has changed since the , s last general rate case that affects Jurisdictional Separations? Big s have occurred in the allocation factors.For example, the number of customers in Idaho and on the total System grew substantially since the last rate case, but the Idaho customer allocator only grew about 1 percent.The story is very different for the demand and energy allocators.Idaho s share of total Company peak demand grew approximately 8 percent and Idaho s share of total energy use grew approximately 9 percent.In all three cases Idaho s share of the total has increased.Because these are the characteristics used to divide or allocate costs among the jurisdictions, the Idaho Juris has become a larger share of the Company s total costs of providing service. Please explain in more detail the changes that have occurred in these allocators Slnce the Company last general rate case. The addition of 100,000 new customers in Idaho did not substantially change the Idaho customer allocator because ional , soccurred in the other jurisdictions.The growth in the rela ti ve percentages of the energy and coincident peak demand allocators res more explanation.Total Company CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff energy ion has decl ined and total peak demand has not increased as fast as peak demand in Idaho. There are a number of factors at ay here.The large increase in customers increased Idaho Peak demand and energy requirements and Idaho Power lost its single largest customer, FMC/Astaris.Since Idaho Power s last general rate case, nearly all of its FERC Jurisdictional contract sales expired as ori lly designed so that the Company s resources could be fully utilized to supply its load growth.These expired contracts practically eliminated FERC Jurisdictional energy and peak demand. When Idaho s share of peak demand is calculated, the Idaho Jurisdiction becomes responsible for an additional 8 percent share of total Company demand-related costs. When Idaho s share of total energy is calculated, Idaho becomes responsible for an additional 9 percent of total Company energy-related costs, not only because Idaho energy requirements increased but because total Company energy requirements decreased. Have you prepared an exhibit that shows how these allocation factors have changed since the Company last general rate case? Staff Exhibit No. 118 shows theseYes. changes.There are several di fferent Energy, Demand and Customer Allocators used in the Jurisdictional CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff ions S The exhibit includes one of each for illustrative purposes. has the Company not entered into firm contracts to sell the unused energy made available by the expiration of the FERC jurisdictional contracts? Doing so would reduce Idaho s peak demand and energy allocators.However , the Company has also changed the load and water planning criteria in its Integrated Resource Plan.In response to high costs experienced by the Company and its customers in 2000 and 2001 when streamflows were low and market ces were extremely high, the Company now plans to meet its load during low water conditions with reduced reliance on market purchases.This change in planning criteria, coupled wi th new customer load , has all but el excess energy available for new firm wholesale contracts. Wha t happens to the uncommi t ted capaci t y that is be held in reserve to meet above normal load and/or below normal streamflow conditions? In low water or high load conditions, the reserve capac1 1S available to the Company and its customers to meet 1 ad at a price that will usually be below the cost of purchasing market power.In normal or above normal water conditions when the costs of wi th these resources is below market pr1ce, CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff Idaho Power will sell the power and credit the revenues against expenses, which reduces customer rates.In this case, these benefits are captured in the power supply model process that establishes normal power supply costs included in base rates.On a year-by-year basis, deviations from base power supply costs are captured in the PCA. Does Staff agree with the Jurisdictional Separations process used by Idaho Power Company? The Company used the same 12CPYes. methodology that it has used for more than 20 years. is appropriate for changes in Company costs and changes 1n jurisdictional use characteristics to change customer ra tes.However , without compelling reason , it is not appropriate to cause tional rate s due simply to change in allocation methodology.In its analysis, Staff used the Company s methodology and jurisdictional allocators with Staff's proposed account adjustments to determine the Idaho Jurisdictional revenue requirement. What are the results of Staff's Jurisdictional process? Staff's cost of service results, revenue al ocation to classes and rate designs are based on a total Idaho Jurisdiction revenue requirement initially CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff determined to be $499 161,903 which is an increase of $15,200,534, and results in a 3.14 percent average increase in rates.After that initial determination, staff auditors continued to examine fic items in the Company s revenue requirement, which ultimately reduced Staff's recommended Idaho Jurisdictional revenue requirement to $498 758 249 , an increase of $14 796 880 or a 3.06 percent average rate increase.Because lass cost of service studies, revenue allocations and rate designs involve complicated issues and analysis, it was necessary for the Staff members wor on those 1ssues to prepare their recommendations before the Staff audi tors had concluded their analysis.Accordingly, staff testimony on revenue allocation , cost of serV1ce and rate design are based on the initial Staff determination of the Company s Idaho Jurisdictional Revenue Requirement.it No.Staff 19 summarizes the results of Staff's jurisdictional separations study. Staff witness Schunke s testimony provides revenue allocation and rate design guidelines for the Commission s consideration that accommodate the reduced Staff revenue requirement proposal. COST OF SERVICE What is a cost of service study? A cost of serV1ce study divides the Idaho CASE NO. IPC-03-02/20/04 (Di)HESSING , K.Staff Jurisdictional Revenue Requirement among the Company various customer classes based on the cost-causing characteristics of the classes.The process is similar to the Jurisdictional Separations process.Alloca tors are developed for each customer class as pe s of the Idaho total for energy use, contributions to monthly coincident peak demand and numbers of customers.These allocators are then used to distribute the total Idaho Revenue Requirement to the various customer classes. What class cost of service methodology did the Company use? The Company used substantially the same methodology that it has used in its last two general rate cases.The method is called the weighted 12 coincident peak (W12CP) method.For the allocation of related costs, this method weights monthly coincident peak demands by the marginal cost of providing for those demands and averages the results with unweighted 12CP resul ts .In months when the Company is not ing a peak demand deficit, a zero wei ing is applied.When seven of the months are weighted at zero, the allocators become the average f, what amounts to, a wei 5CP methodology (the remaining five months of coincident peak demands) and an unweigh ted 2CP methodology. The same method is used for the allocation of CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff transmission related costs except on the transmission system there are nine months when the Company does not expect peak demand deficits.Therefore, only three weighted months are averaged with the 12CP numbers to obtain the proposed allocation factors.The maj or energy allocator is calculated based on monthly energy use weighted by the monthly marginal cost of energy.It is not averaged with other unweighted allocators. Steam and Hydro production investment are classified as related to demand or related to energy based on an Idaho Jurisdictional Load Factor (the ratio of average use to peak use) of 55.This means that 55.26 percent of these investments are allocated to customer classes based on energy use and the rema1n1ng amount is allocated based on peak demand. What has changed since the Company s last general rate case ten years ago that affects cost of service? There have been many changes.A few of the changes are: the addition of 100,000 new customers, the loss of the FMC/Astaris load, the change in the Company load and water pI ter ia a more conservat posi tion, the deregulation of the wholesale electric market, and the change in the Company oad/ resource characteristics from be energy constrained to capaci CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff constrained. How might these changes affect cost of service resul ts? These s affect the Company s underlying costs, the energy and capaci allocators applied to each customer class, and the marginal costs used to wei the alloca tors.Virtually everything that affects cost of serV1ce, except the basic methodology, has changed. Please describe the cost of service analysis performed by Staff. staff used the Company s W12CP methodology that has been by the Commission in past proce staff also used the wei factors and associated methodology proposed the Company in recognition that and energy are more costly to In some months of the year.Staff recognizes that weighted months, some of which were weighted at zero, averaged with unweighted months, creates demand allocators that are more complex than those used in the past.staff can accept the use of some zero we1 ed months because they are averaged with unweighted months and because they de with the months where no capacity constra expected.Staff Exhibit No. 120 shows the results of Staff's Cost of Service Study.In his testimony, Staff wi tness Schunke proposes a modified allocation of revenue CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff requirement to customer classes that is not entirely based on cost of service results. Are unweighted and zero weighted months the same thing? If the peak demand for a month is zeroNo. wel ed, it is mul zero and no value islied included in the calculation of the weighted allocator for that month.I f the peak demand for a month is unweighted, the actual coincident peak demand is used in the calculation of the allocator. How many cost of service studies did Staff perform? staff performed three cost of serV1ce studies. I have already described the first one which is the study recommended Staff. What was the second study performed by Staff? The second study is a weighted 12CP study with the weighted portion of the June allocator weighted at zero.The resulting ratio was averaged with the unwel ed ratio to obtain the final allocators.The resul ts of this study are shown on Staff Exhibit No. 121. The results showed a decrease in thes s required increase for the irrigation class.The increase dropped from 47.2 percent to 44.5 percent. Please discuss Staff's third cost of serVlce CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff study. The third study is a traditional unweighted 12CP study.The analysis removed all 1 cost demand and energy weight used to calculate alloca tors.Weightings were removed in the calculation of production and transmission demand allocators and for the calculation of the energy allocator.staff Exhibit No. 122 shows the results of the study.When all weightings were removed, which is the same as setting them at , the required increase in irrigation rates dropped aga1n, this time to a 29.percent increase. course, any time the allocation drops for one class the other customer classes pick up the difference to produce the revenue required to cover the Idaho jurisdictional revenue requirement. Why did Staff perform the second and third studies? The results of the Company s W12CP methodology require a substantial increase to bring the irri ion class to full cost of serV1ce, as m1 be expected with capaci ty and energy allocators more heavily weighted in summer months.staff wanted to know how sensi class allocations, especially irr iga tion class allocations, are to al oca tion factor changes.All three studies show the irrigation class requi an increase far above any CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff other class.Using the Company s methodology, as Staff did in its first study, the irrigation class would require an increase five times the next highest class lncrease. Please compare the effects of the unweighted 12CP methodology and the Company s W12CP methodology on the Residential customer class. The results of the weighted 12CP study showed a 08 percent decrease for residential customers. Unweighted study results showed residential rates a 1.71 percent lncrease.Gi ven the residential customer s summer air conditioning load these results may seem inconsistent.However, a more detailed review of residential load data provides an explanation.The winter heat load is er than the summer air condi tioning load and January and February are zero weighted in the weighted 12CP production al ocator. Also, all winter months are zero weighted in the weighted 12CP transmission allocator.The result is a relatively small effect on residential cost of service regardless of the allocator weightings used in the cost of service study. Why did Staff choose the Company s proposed cost of service methodology including its allocator weight CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff staff believes that demand-related plant investments are driven by low hydro conditions and high oads in the critical peak months.It is the demand in these critical months when the system is capacity constrained that is most relevant in this analysis. Therefore, any analysis that does not weight the critical months more heavily than shoulder months does not correctly reflect forward-looking demand related costs. The Company s study gives heavier weighting to the five cri tical months of June, July, August, November and December.Therefore, Staff believes that the monthly weightings are justified and that the Company s cost of service methodology is reasonable. THE POWER COST ADJUSTMENT (PCA) MECHANISM What is the PCA? In general, the PCA is a rate adjustment mechanism that annually adjusts customer rates to recover or re fund 90 of above or below normal load usted power supply costs.Each year the PCA is composed of a forecast or predicted component and a true up component. What PCA items does your test scuss? Base power supply costs are established in a general rate case and those are discussed in Staff wi tness Rick Sterl , s testimony.From the process that CASE NO. IPC-03-02/20/04 (Di)HESSING , K.Staff establishes base power supply comes the PCA forecast, which I will discuss.I will also discuss the oad adjustment and some other components of the PCA calculation. How will the results of this rate case change the PCA? The normalized power supply costs established in thi will be included in the base rates of each customer class.The annual proj ection or forecast of power supply costs based on water conditions will also in base power supply costs will cause a recalculation of the predictive formula that relates April through July Brownlee inflow to Net Power Supply Costs.Each April this formula along with the National Wea ther ce runoff forecast is used to proj ect net power supply costs for the coming year.Company "vi tness Greg Said discusses this calculation in his direct test 19 of his testat page 16. shows the Company-proposed forecast formula.Company Exhibi t No. 35 shows the data and regression resul ts . Does Staff agree with the Company s calculat of the forecast formula? Staff has not adjusted the CompanyYes. power supply model results in this case and proposes no CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff changes in the forecast methodology other than exclusion of the FMC/Astaris adjustment proposed Company witness Said (Direct Testimony, page 19, 1 17-24). Therefore, Staff calculates the same forecast formula as the Company. Does the Company propose to update other PCA computations? Company Exhibit No.3 6 shows four PCAYes. computations that Company witness Said proposes to update.He updates "Normalized PCA Expenses " which is normalized power supply expense from the Aurora model plus normalized CSPP costs.The new number is $94,101,100 per year. The Company updates the "Normalized Base PCA Rate " which is normalized PCA expenses divided normalized system firm sales.The new rate is .7315 C::/kWh. Idaho Power also updates the "Idaho Jurisdictional Percentage " which is used to allocate abnormal power supply costs to Idaho.It is calculated by dividing normalized system firm load Idaho Jur1 ctional firm load.The number is 94. Finally, the Company updates the "Expense Adj ustment Rate for Growth" which is used to remove power supply cost increases associated with growth.Mr. Said CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff calculates 13.98 $/MWh in the exhibit but uses a different rational to propose 7.30 $/MWh in his testimony. Is it appropriate to update these calculations in this general rate case? These calculations are intended to beYes. updated in a general rate case. Does Staff accept the results of the updated calculations for use in the PCA? Staff accepts the Company s updated calculations as shown on Company Exhibit No. 36, except for the calculation of the e Adjustment Rate for Growth.Staff disagrees with the Company s rational for and calculation of this adjustment. Please discuss the Expense Adjustment Rate for Growth. Such a discussion requires some basic PCA background.The PCA captures actual booked monthly power supply costs that are above or below the normal values established the Commission and included in base rates. These differences from normal power supply costs result from abnormal streamflows, abnormal market prlces, abnormal fuel prices, abnormal loads that may be caused by weather, buy-back programs, conservation, or load growth or loss.e Adjustment Rate for GrowthThe CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff (EARG) is aimed very specifically at the variable cost of power supply caused by changes in load.When load grows, the EARG is part of the me sm that removes the above normal costs of power supply captured in PCA accounts that are associated with load growth.In essence this ustment removes the power supply effects of load growth and leaves the effects of abnormal water conditions and market pr1ces, which the PCA is desi to capture. When loads are below normal, the EARG mult lier is part of the mechanism that s the Company from losing both the retail revenue and power supply cost sav1ngs that are credited back to customers through the PCA.Again , this adjustment removes from the PCA the power cost effects of the loss in load and leaves the effects of abnormal water and market prices in the PCA.When these adj ustments are appropriately made using the correct multiplier, the Company neither over-collects nor under-collects power supply costs through the PCA when consumption is higher or lower than normal.The difference between power supply costs incurred to serve new customers and embedded power y costs collected in rates must still be recovered in a general rate case just as it has been in the past.The PCA is left to capture predominantly power supply cost s that CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff resul t from abnormal water and market prlce conditions tha t would not be captured under the normal conditions assumed in a genera rate case. You mentioned that the load adjustment mechanism works if the correct value is used as the Expense Adjustment Rate for Growth.What is the correct EARG value? Power supply costs associated with load are captured in the PCA at the marginal cost level. Therefore, they must be removed at the marginal cost level.In Response No. 30 to the Second Production Request of the Idaho Irri ion rs Association, Idaho Power identified the average annual marginal cost of energy as 27.01 $/MWh.This is Staff Exhibit No. 123. At the customer level, which ude s 8. 9 sslon and distribution losses, this becomes 29.41 $/MWh. propose this as the appropriate EARG. What is the current EARG and where did it come from? The current EARG is 16.84 $/MWh and it was established in Case No. IPC-E-92-, the case that first established Idaho Power s PCA me sm.Staff proposed 16.84 $/MWh in that case as a surrogate for the average marginal cost of power supply.It was calculated as the average of Boardman and Valmy fuel costs which at that CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff time the range of normal market prlces. surrogate for Idaho Power s marginal cost of power supply was proposed in that case because Staff did not have an opera t power supply model that would allow it to incrementally adj ust the load and calculate the marginal cost.In the Company s last general rate case, Case No. IPC-E-94-, 16.22 $/MWh was calculated from an incremental power supply model run.No recommendation was made to change the 16.84 $ /MWh EARG because the difference was smal What would be the result if the Commission adopted the Company s proposal to use the average power supply cost of 7.30 $/MWh for the Expense Adjustment Rate for Growth? The fference between the actual power supply costs of 29.41 $/MWh incurred to serve new customers and the 7.30 $embedded cost proposed the Company would be collected from customers through the PCA and flowed through to Idaho Power Company shareholders.In other words the Company would collect power supply costs from new customers through base rates and collect 22.11 $/MWh (29.30) for new through a PCA surcharge.While the Company has argued that the revenue it receives from new customers does not cover all the incremental costs of adding them, the EARG CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff proposed by the Company amounts to a windfall that more than recovers power supply costs.As I have previously sta ted, a general rate case, rather than the is the appropriate place to recover load growth related power supply costs.Therefore, Staff recommends that the Commission adopt its Expense Adjustment Rate for Growth of 29.41 $/MWh to eliminate the shareholder windfall and maintain the integrity of the PCA. CLOUD SEEDING What is your understanding of the Company cloud s program? Several years ago, members of the Commission Staff, including mysel f, met with Idaho Power Company to discuss cloud seeding.At that time the Company was considering a pilot program to seed clouds in the upper Payette River drainage.The Company s goal was to provide more precipi ta tion in that area in the form of snow that would melt dur the summer and provide addi tional water to the Company s hydro facilities, allowing it to generate more electrici Part of the reason for the meeting had to do wi th the effects on the PCA f such a proposal.To the extent more water could be provided to generate more electrici ty, the value of that electricity would be captured by the PCA and substantially (90 ) passed back CASE NO. IPC-03-02/20/04 (Di)HESSING , K.Staff to ratepayers.This would leave customers with the benefi ts and the Company s shareholders with the costs. The Company not be ieve stribut of costs and benefits to be fair.One al ternati ve discussed was to allow the Company to include the costs of cloud seeding in the PCA so that customers would pay the costs and receive the benefits.Of course, if the benefits did not exceed the costs, the loss would be passed to customers through PCA rates. Another a ternati ve for cost recovery discussed at the meet was that the Company the program and incur and book the costs.The next general rate case would then pick up a test year that included the costs, at which time they could be discussed and the Commiss could choose to or rej ect them. Rather than seeking recovery through the PCA, the Company has included cloud seeding costs for the 2003 test year in this case.Those costs include $897, 48 in operation and maintenance expense (Account 536) and $214,600 in capital costs (Account 101). Does Staff have a position regarding the recovery of these sts in the current case? The Company did not provide enough information in its filing for Staff to make a recommendation on the meri ts of cloud s For example, the Company did CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff not state whether the program has created measurable precipi ta tion and, if so, how much.Wi thout more information it is not possib e to evaluate whether the cloud se I f thecosts were prudently incurred. Company does not provide additional information in this case, Staff recommends that all cloud seeding costs be removed. What information does Staff believe should be provided by the Company to allow an adequate opportunity to evaluate the requested cost recovery? Given the experimental and somewhat controversial nature of cloud seeding programs and the sizable amount of money requested to be included in rates on an annual basis, Staff believes the Company should address the foIl lssues: 1 )What acti vi ties constituted the cloud seeding program in past years, including the test year, and what are the Company s cloud se plans for upcoming years? 2 )What criteria will the Company use to determine the level of cloud seeding acti vi ty and expendi tures necessary In any year? How does the Company evaluate whether cloud seeding works and that the benefits exceed the costs? 4 )What would be the effect on the Company CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff cloud seeding program if the Commi Slon denied recovery of the costs requested in this case? Does this conclude your direct test this Yes, it does. CASE NO. IPC-03-02/20/04 (Di)HESSINGStaff