174 



2 

 modifications. (These cost estimites mclude the construction costs «s 

 wdl those for Engineering ind design, supervision and administration, and 

 contingencies.). 



When analyzing the impacts on preference rates, power in^acts must be added 

 to the modification costs. For a 10-week drwdown of Lower Granite to 

 710 feet devation, the annua] costs are about S18 nullion for energy, 

 SI 1 nullion for c^>acity and $11 - S20 million for foregone nonfirm revenues 

 for an annual total of about S40 - S49 million. For a S-month drawdown of 

 John Day to 2S7 feet elevation, the annual costs are about SS million for 

 energy, S5 • S20 million for capacity and $2 - $5 million for foregone nonfiroi 

 revenues for a total of $12 - S30 millioa The annual capital cost for Lower 

 Granite and John Day are estimated to be about SS - S7 nuDion each. Hie 

 combined annual impact of the two projects totals roughly S62 - $93 million 

 which would produce an upward rate impact of roughly .8 to 1.0 mills/kwh or 

 about 4 to 6 percentage points fi'om current levels. 



We would like to take this opportunity ot present BPA's 1993 costs for fish 

 enhancement activities. The costs reflected in the table bdow are discussed in 

 greater detail in our responses to questions 5, 6, and 7. 



