The Hells Canyon Case 169 



mate of downstream generating capacity warranted by the develop- 

 ment of the Hells Canyon Reach, and the investment associated 

 with its installation; (d) assumed downstream generation based on 

 eight currently completed or authorized downstream structures, 

 considering the Hells Canyon development as the last added; and 

 (e) an incremental method of estimating the increase in system 

 prime power attributable to the development of the Hells Canyon 

 Reach. (See FPC Decision, Finding No. 119, p. 62, and also StaQ 

 Brief, Appendix A, pp. 14, 17.) 



The estimate of nominal prime power for the two-dam plan of 

 development employed in the analyses of Chapter V used the esti- 

 mate of Witness Meadowcroft, adjusted for differences in length 

 of critical period, additional irrigation acreage, and a transforma- 

 tion to achieve comparability with Cotton's estimated results for 

 the three-dam and high-dam plans. (See FPC Staff Brief, Appendix 

 A, p. 16.) 



Value of Power. This was taken from the estimates prepared by 

 the FPC appearing in the Stafj Brief, p. 14, and the examiner's 

 Decision, p. 47. 



Value of Flood Co?itrol and Navigation. The estimates of the 

 U. S. Corps of Engineers for flood control and navigation are given 

 in Exhibits, No. 372 in the record of the hearings. These estimates 

 differ from somewhat lower early estimates to reflect subsequent 

 re-evaluation and upward adjustment. 



