V. DETERMINING REVENUE REQUIREMENTS
Dawn Lund presented the requirements for determining revenue. The utility basis
methodology combines O&M expense, depreciation, and rate of return to determine
the total revenue requirements. The cash basis methodology combines the O&M
expenses (excluding depreciation expense), capital expenses, and debt service
(principal and interest) to determine the total revenue requirements. The cash basis
attempts to match cash inflows and outflows on a yearly basis, and it’s typically used
in budget preparation. The cash basis tends to result in fluctuations of rate adjustments
because the cash flow follows capital. Depreciation is a fair and equitable way to
measure the consumption of the asset in one year. It fairly spreads out the cost of the
asset over the useful life and places it in the revenue requirements each year for rate
making and leads to more stabilized rates.
VI. SETTING KEY FINANCIAL TARGETS RELATED TO COST OF SERVICE
Dawn Lund explained key financial targets related to cost of service. Debt coverage
ratio identifies cash generated by operations above the debt service payment. Debt
coverage ratios are mandated by covenants and established in bond ordinances.
When setting rates, a safety factor must be built into the coverage ratio for planning
purposes since electric sales are dependent on weather, power supply prices
fluctuate, and unexpected expenses can occur. A safety factor of 0.2 is typically
added to bond coverage requirement. Cash reserve policy should identify a minimum
cash reserve level, and there are at least five factors to consider when determining the
minimum cash: O&M expenses, power costs, historical investment in assets, annual
debt payment, and total five-year capital plan. A formal cash policy should be
developed so future management, boards and councils will continue to maintain
adequate reserve levels. A capital plan involves governing bodies strategic planning,
engineering planning, and financial planning. A power cost adjustment is an automatic
kWh charge that is passed through to customers for increasing power costs, and it
reduces the amount and frequency of rate adjustments. Adequate rate of return on
investment to help ensure current customers are paying their fair share of the use of
the infrastructure and not deferring the charge to future generations. The target
operating rate of return is typically 4-7% for municipals.
VII. COST OF SERVICE
Dawn Lund provided information on cost of service. Cost of service is a method to
equitably allocate the revenue requirements of the utility among the various customer
classes of service. Cost of service ensures rates recover costs to provide service to
customers, defines optimal rate structure, and reduces cross-subsidization between
classes. The steps of a cost of service study are as follows: define revenue
requirements, arrange costs according to function, classify functionalized costs to cost
components, and assign the classified cost to customer classes.
VIII. DETERMINING LONG-TERM RATE PLANS
Dawn Lund explained the importance of determining long-term rate plans. Customer
charges need to be corrected during rate changes. A plan needs to be set to move in