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Rate Design Options IPUC Staff 5/7/2002 Total Fixed Revenue Requirement $ 22,917.33 Consumption Sensitive Revenue Requirement $ 2,365.08 Total Revenue Requirement $ 25,282.41 Option 1: Historical PUC Rate Methodology - Deliver only to permanent customers. Revenue Requirement Customer Charge Recommended Rates Revenue Recovery Revenue Requirement $ 25,282.41 Number of Permanent Customers 28 Annual Water Charge Per Customer $ 902.94 Monthly Water Charge Per Customer $ 25,284.00 $ 75.25 $ 75.25 $25,284.00 Over (Under) Recovery $ 1.59 $ 1.59 Option 2: Full Service Resort Rate Methodology - All Reported Property Owners Pay a Share of the Costs Revenue Requirement Customer Charge Recommended Rates Revenue Recovery Consumptive Sensitive Revenue Requirement $ 2,365.08 Customers With Consuptive Use 28 Annual Water Charge Per Consumptive Customer $ 84.47 Monthly Water Charge Per Consumptive Customer $ 2,365.44 $ 7.04 Non-Consumptive Sensitive Revenue Requirement $ 22,917.33 Total Number of Possible Water Users 87 Annual Water Charge Per Possible Water User $ 263.42 Monthly Water Charge Per Possible Water User $ 22,915.80 $ 21.95 Total Monthly Charge Per Consumptive Customer $ 9,740.64 $ 28.99 $ 29.00 $ 9,744.00 Total Monthly Charger Per Other Possible Water User $ 15,540.60 $ 21.95 $ 22.00 $15,576.00 $ 25,281.24 $25,320.00 Over (Under) Recovery $ (1.17) $ 37.59 Rate Design Options (Continued) IPUC Staff 5/7/2002 Option 3: Available Service Resort Rate Methodology - Weight Rates Based on the Number of Serviceable Customers Revenue Requirement Customer Charge Recommended Rates Revenue Recovery Consumptive Sensitive Revenue Requirement $ 2,365.08 Customers With Consuptive Use 28 Annual Water Charge Per Consumptive Customer $ 84.47 Monthly Water Charge Per Consumptive Customer $ 2,365.44 $ 7.04 Non-Consumptive Sensitive Revenue Requirement $ 22,917.33 Total Number of Serviceable Water Users 37 (Staff Attachment 4, Page 3) Annual Water Charge Per Serviceable Water User $ 619.39 Monthly Water Charge Per Serviceable Water User $ 22,919.28 $ 51.62 Total Monthly Charge Per Consumptive Customer $ 19,709.76 $ 58.66 Remaining Revenue Requirement $ 5,572.65 Total Number of Other Possible Water Users 59 Annual Water Charge Per Possible Water User $ 94.45 Monthly Water Charge Per Possible Water User $ 5,571.96 $ 7.87 Total Monthly Charge Per Consumptive Customer $ 19,709.76 $ 58.66 $ 58.50 $19,656.00 Total Monthly Charge Per Possible Water User $ 5,571.96 $ 7.87 $ 8.00 $ 5,664.00 $ 25,281.72 $25,320.00 Over (Under) Recovery $ (0.69) $ 37.59 Ponderosa Terrace Estates Water Co. Serviceable Customers IPUC Staff 5/7/2002 Customers as Reported by the Company Total Number of Customers That Could Use Water 87 Number of Permanent Residences 28 Difference 59 Based on Engineering Report by Taylor Engineering Consultants (6/25/99) Chlorination Study Staff Review of Well Logs 1999 Well Capacity (Maximum) 35 20 Gallons Per Minute(gpm) Curent Customers 20 28 (Sustainable) Additional Future Customers 92 Additional Well Requirements 50 gpm Total Well Requirement For the Development 85 gpm Total Number of Customers on the System 127 PUC Staff Calculations Based on Taylor Engineering Report Average Flow Per Customer 0.6693 0.6693 gpm/customer Additional Well Installed in 2000 5 5 gpm 5 Total Existing Well Capacity Available 40 25 gpm Maximum Serviceable Customers With the Existing Well 59 37 Customers Comment: Even though the Company indicates that up to 87 customers could possibly use the existing water system the system supply cannot support more than 37 full time customers. In addition the PUC Staff has received reports that the primary reason the additional source was developed in 2000 was because the system actually ran out of water in the fall of 2000. Staff therefor believes that the maximum capacity of the system is somewhat less than the calculated 37 customers. Without additional groundwater evaluations Staff cannot determine exactly what the maximum number of customers that can truly be served by this system . Staff assumes that the loss of water in the fall of 2000 was a condition that occured due to a significant drought in the water shed and will base rate calculations on the maximum number of 37 customers. Staff recommends additional study to determine the actual number of customers the system can sustainably serve prior to the commission lifting the restriction on permanent connections. Rate Design Options (Continued) IPUC Staff 5/7/2002 Option 4: Available Service Resort Rate Methodology - Only Full Time Serviceable Customers Share the Costs Revenue Requirement Customer Charge Recommended Rates Revenue Recovery Consumptive Sensitive Revenue Requirement $ 2,365.08 Customers With Consuptive Use 28 Annual Water Charge Per Consumptive Customer $ 84.47 Monthly Water Charge Per Consumptive Customer $ 2,365.44 $ 7.04 Non-Consumptive Sensitive Revenue Requirement $ 22,917.33 Total Number of Serviceable Water Users 59 (See Staff Exhibit 2, Page 3) Annual Water Charge Per Serviceable Water User $ 388.43 Monthly Water Charge Per Serviceable Water User $ 22,917.96 $ 32.37 Total Monthly Charge Per Consumptive Customer $ 13,241.76 $ 39.41 Remaining Revenue Requirement $ 12,040.65 Total Number of Other Possible Water Users 59 Annual Water Charge Per Possible Water User $ 204.08 Monthly Water Charge Per Possible Water User $ 12,043.08 $ 17.01 Total Monthly Charge Per Consumptive Customer $ 13,241.76 $ 39.41 $ 39.50 $13,272.00 Total Monthly Charge Per Possible Water User $ 12,043.08 $ 17.01 $ 17.00 $12,036.00 $ 25,284.84 $25,308.00 Over (Under) Recovery $ 2.43 $ 25.59