306 



II 



1987 

 1988 

 1989 

 1990 

 1991 

 1992 

 1993 



IV. Valuation of Reserves 



Absent the DSI restriction rights, BPA would be required to meet Its 

 Federal system reserve obligation through alternative means. For the value of 

 reserves analysis. BPA estimates the least cost alternative to the DSI 

 restriction rights. 



A. Forced Outage Reserves 



If the DSI restriction rights were not available, Federal forced 

 outage reserve requirements probably would be met by the installation of 

 combined cycle combustion turbines. Combined cycle combustion turbines were 

 selected instead of single cycle combustion turbines as the most 

 cost-effective approach to satisfy reserve needs for both capacity and 

 energy. This selection also satisfies the requirement to value both capacity 

 and energy reserves, as directed in the Northwest Power Act. To meet the 

 Federal reserve requirement In 1982. BPA assumed 1880 megawatts of 



A- 8 



