736 ECONOMICAL ASPECTS 



ESTIMATE OF CAPITAL COST 



Dam for closing present channel: 



Scheme A +25 per cent $3,325,000 



Scheme B +25 per cent 2,288,000 



Scheme C +25 per cent 3,344,000 



Scheme D +25 per cent 3,056,000 



Scheme E +25 per cent 3,485,000 



Scheme F +25 per cent 3,419,000 



Use for estimate . - $3,350,000 



Controlling dam: 



Camere type of dam; "approximate quantities as de- 

 signed for 81 feet controlled depth. 

 25,000 tons structural steel. 



4,000 tons cast steel. 

 230,000 cubic yards of concrete. 

 1 traveling gantry crane. 



Estimated cost, reduced 25 per cent, for 67 feet con- 

 trolled depth plus 25 per cent contingent fund $3,851,000 



Tainter-gate type of dam, approximate quantities as 



designed for 81 feet controlled depth. 

 41,600 tons structural steel. 

 21,800 tons cast steel. 



480 tons steel cable. 

 312,450 cubic yards concrete. 



Estimated cost, reduced 25 per cent, for 67 feet con- 

 trolled depth plus 25 per cent contingent fund 8,837,000 



Use for estimate of controlling dam 8,837,000 



Flood channel: 



Approximate quantities: 



2,078,000 cubic yards rock excavation, above elevation 



84.0 (sill of flood gates) plus 25 per cent 2,078,000 



Diversion channel: 



Approximate quantities: 



1,243,000 cubic yards rock excavation for diversion 



channel below elevation 84.0. 

 140,500 cubic yards concrete. 

 810,000 F.B.M. timber for cribs. 



8,000 cubic yards rock fill in cribs. 

 Estimated cost of diversion channel and closure of same 



plus 25 per cent , . 2,872,000 



Ice and drift sluice, Oregon side: 

 Approximate quantities: 

 252,000 cubic yards rock excavation. 

 28,300 cubic yards concrete. 



320 tons structural steel rollers. 

 Estimated cost plus 25 per cent 452,000 



Wing walls for rock fill dam: 

 Approximate quantities: 

 42,500 cubic yards concrete plus 25 per cent 266,000 



Main floating boom and piers: 

 Approximate quantities: 

 11,394,000 f.b.m. of timber. 



1,055 tons of rods and drift pins. 

 3,000 cubic yards concrete. 

 46,000 cubic yards rock fill in piers. 

 Estimated cost plus 25 per cent '. . . 493,000 



