173 



Questions for Bonnevffle Power Administntioo Task Force Hearing 

 April 2S, 1993 



QUESTIONS FROM CONGRESSMAN LAROCCO 



Question 4: There hive been proposals nude to modify John Diy and Lower Granite dams 

 to opente in a drawdown mode. According to these proposals, at aaost these 

 modifications would cost S200 million. Does BP A concur with these 

 modification cost estimates? If not, vubMX does BPA estimate modification of 

 these two dams to cost? What would the annual preference imte increase be if 

 this project was amortized over fifty years like other capital construction costs? 



Answer; BPA has not made an independent analysis of the construction and mitigation 



costs for any of the drawdown alternatives. Relying on the Corps' estimate, it 

 is expected a one pool drawdown of Lower Granite wiU cost between S60 and 

 $86 milL'on (depending upon whether or not a new collection and holding 

 fiuality is included). For Lower Granite, the Corps estimates include: 

 SIS million for low levd juvenile collection ftdlity, S14 million to upgrade 

 collection and holding facilities, SS million for oaodification of adult ladders, 

 S29 million for bank stabilization, SI million for miscellaneous dam 

 modifications, SIS million for engineering and design and $4 million contract 

 supervisors and administration. 



To lower John Day to an elevation of 257 feet, the Corps estimates 

 modification costs to be S7S.9 million which breaks down as follows: 

 $12.2 million to modify the easting pumping stations, SI. 9 million to 

 modify adult ladders and navigation ftdlities, $18.9 millicm for a 

 repiacemeat wildlife refuge, S2S.S million to restore recreation sites to 

 their present levd of service, SI 6.1 million modify muiudpal water supply 

 for the dty of Umatilla and to install a water reuse system for the Umatilla 

 and Irrigon fish hatcheries, and $1.3 million for misceUaneous 



