COST OF HYDRO-ELECTRIC POWER PLANTS 



733 



ESTIMATED COST OF 200,000 AND 300,000 HORSE-POWER HYDRO- 

 ELECTRIC DEVELOPMENTS 



From Bulletin No. 5, State Engineer's Office, Oregon 

 Head: 200 feet minimum. 



ESTIMATE OF COST, 200,000 ELECTRICAL HORSE-POWER INSTALLATION 



River diversion: 



Temporary diversion channel: 



Excavation above elevation 885, 500,000 cubic yards, 



at $1.00 



Excavation below elevation 885, 100,000 cubic 



yards, at $1.50 ' 



Concrete, lining, 10,000 cubic yards, at $8.00 



Concrete walls, 5000 cubic yards, at $8.00 



Concrete, miscellaneous, 2000 cubic yards, at $10. 

 Steel reinforcing, 100 tons, at $100.00 



Cofferdams, earth and rock fill: 



Upper cofferdam, 300,000 cubic yards, at $1.00. . . 

 Lower cofferdam (first structure), 100,000 cubic 



yards, at $1.00 



Lower cofferdam (replacing structure), 100,000 



cubic yards, at $1.00 



Extraordinary contingency (insurance allowance) . . . 



Main dam: 



Excavation below elevation 885, 350,000 cubic yards, 



at $2.00 



Excavation above elevation 885, 50,000 cubic yards, 



at $1.00 



Concrete, 760,000 cubic yards, at $6.00 



Movable dam crest 



Forebay and penstocks: 



Tunnel excavation, 32,000 cubic yards, at $5.00 



Tunnel lining concrete, 5000 cubic yards, at $8.00. . . 



Open excavation, 200,000 cubic yards, at $1.00 



Forebay walls, concrete, 20,000 cubic yards, at $7.00 

 Penstock cradles, concrete, 5000 cubic yards, at $8.00 



Gates, trash racks, etc : 



Penstocks, 1500 tons, at $140.00 



Reinforcing steel, 100 tons, at $100.00 '. 



Power and transformer house: 



Excavation, 60,000 cubic yards, at $1.00 



Concrete, 20,000 cubic yards, at $8.00 



Concrete, 5000 cubic yards, at $12.00 



Reinforcing steel, 100 tons, at $100.00 



Roof, crane, etc 



$500,000.00 



150,000.00 

 80,000.00 

 40,000.00 

 20,000.00 

 10,000.00 



300,000 . 00 

 100,000.00 



100,000.00 



700,000.00 



50,000 . 00 



4,560,000.00 



190,000.00 



160,000.00 



40,000.00 



200,000.00 



140,000.00 



40,000.00 



200,000, 00 



210,000.00 



10,000.00 



$800,000.00 

 I 



500,000 00 

 500,000.00 



5,500,000.00 



1,000,000.00 



60,000 . 00 

 160,000.00 

 60,000.00 

 10,000.00 

 60,000.00 



Right of way (assumed). . . 



Summation of above items 



Engineering and contingencies, 25 per cent 



Interest during construction, 2 J years at 4 to 10 per cent 



Hydro-electric equipment: 



Turbines, generators, exciters, and governors, 7 units, 



25,000 Kw. each, at $200,000 .00 



Switchboard, plant wiring, etc 



Transformers, 150,000 Kw 



Freight, erection and installation 



Summation of above items 



Engineering and contingencies, 20 per cent 



Interest, J yr. at 4 per cent say 3 3 per cent 



350,000.00 

 150,000.00 



8,800,000.00 

 2,200,000.00 

 1,100,000.00 



$12,100,000.00 



1,400,000.00 

 200,000.00 

 500,000 . 00 

 400,000.00 



$2,500,000.00 

 500,000.00 

 100,000.00 



Total for project 



200,000 E.H.P. continuous development at $76.00 per 

 E.H.P. 



3,100,000.00 

 $15,200,000.00 



