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establish or alter any ultimate legal obligation of the Industrial Purchasers 

 under the Act for the payment of any particular costs. The firm offer 

 contained in the enclosed contract, therefore, is conditioned upon the 

 following: 



If Bonneville determines after consultation with the Industrial Purchasers 

 that: (1) in any month during the rate period total power sales to all 

 Industrial Purchasers have fallen below 90 percent of the monthly 

 projection of the total Industrial Purchaser load contained in 

 Bonneville's 1981 wholesale power rate filing because of voluntary 

 curtailments by Industrial Purchasers; (2) Bonneville projects significant 

 cash flow problems as a result of such voluntary curtailment; and 

 (3) Bonneville determines that it is unable to mitigate the shortfall in 

 revenues resulting from such curtailments by selling energy made available 

 because of such curtailment, reducing purchases or some other method, then 

 Bonneville shall include in each Industrial Purchaser's next regular power 

 bill the Purchaser's share of the shortfall resulting from such 

 curtailments (less any savings realized by Bonneville's best efforts to 

 mitigate the shortfall) based on the proportion of the Purchaser's 

 projected Operating Demand to the total projected Operating Demands of all 

 Industrial Purchasers executing new DSI Contracts, as contained in 

 Bonneville's letter to your company dated August 14, 1981. This surcharge 

 shall be superseded when Bonneville's wholesale power rates to the 

 Industrial Purchasers provide for recovery of such shortfalls. 



Any amount paid by a Purchaser pursuant to this provision shall be 

 credited to the Purchaser's benefit when Bonneville computes the amount 

 that the Purchaser will pay or receive under section 7(b)(3) of the 

 Regional Act. 



Bonneville believes that the foregoing "shortfall" provision is necessary to 

 assure operations consistent with sound business principles. The shortfall 

 provisions will not be invoked tmless voluntary curtailment is greater than 10 

 percent and a significant cash flow difficulty arises. Even then, Bonneville 

 will use its best efforts to mitigate any revenue shortfall by selling the 

 curtailed power or displacing any purchases to the extent possible while still 

 meeting Bonneville's contractual obligations. 



I regret that this matter has arisen at this late date but we believe that our 

 obligation to recover our costs requires that we condition the offer of the 

 long term contract on this provision, recognizing that in the future, such 

 potential revenue shortfalls will be dealt with in Bonneville's rate 

 proceedings . 



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