734 



ECONOMICAL ASPECTS 



ESTIMATE OF COST, 100,000 ELECTRICAL HORSE-POWER ADDITIONAL POWER 



Forebay, penstocks, power-house and tailrace: 

 Additional, including 25 per cent for engineer- 

 ing and contingencies and 10 per cent 

 interest during construction $1,000,000.00 



Additional equipment, including 20 per cent for 

 engineering and contingencies, and 3 

 per cent for interest, 100,000 H.P 1,500,000.00 



$2,500,000.00 



2,000,000.00 



$4,500,000.00 



15,200,000.00 



$19,700,000.00 



Summation 



This is the total additional cost to supply 100,000 horse-power 

 additional power during the part of the time for which 

 the flow of the river is in excess of 15,000 

 second-feet. 



Estimated cost of storage to maintain a mini- 

 mum flow of 15,000 second-feet, 500,000 

 acre-feet 



Total additional 



Total for 200,000 H.P. project (preceding esti- 

 mate) 



Total for project 



300,000 E.H.P. at approximately $66.00 per E.H.P. 



ESTIMATE OF ANNUAL COST 

 For 200,000 Electrical Horse-power Continuous Development . 



This estimate has been made on the basis of the following assumptions: 

 Interest rate 4 per cent, assumed life of dams, forebay, substructure of power- 

 house, and tailrace, fifty years. Assumed life of movable crest gates, trash 

 racks, penstocks, superstructure of power-house and equipment fifteen years. 

 Annual replacement fund, for fifty-year life portion, $10,800,000 



at f per cent 



For fifteen-year life portion, $4,400,000 at 5 per cent. . 



Annual interest, $15,200,000.00, at 4 per cent 



Annual maintenance and repairs 



Attendance and administration. . 



$72,000.00 

 220,000.00 

 608,000.00 

 60,000.00 

 80,000.00 



Total annual cost, 200,000 E.H.P. development. . . $1,040,000.00 

 Annual cost per E.H.P. on basis of 100 per cent load 



factor $5.20 



Additional 25 per cent 1 .30 



Annual cost, if only 80 per cent of the power is used $6 . 50 



These costs are based upon utilization of the power immediately upon 

 completion of the project. 



