COST OF HYDRO-ELECTRIC POWER PLANTS 



723 



JEFFERSON CREEK POWER SITE 



Estimate of cost: 



Power head 400 feet 



Flow used for estimate 1,000 c. f. s. 



Brake horse-power (80 per cent eff.) 36,363 (27,100 Kw.) 



Dam: 



Total height, 20 feet ; length of crest. 90 feet ; length 

 of spillway, 80 feet. 



Masonry, 1000 cubic yards, at $10.00 $10,000.00 



Excavation, 300 cubic yards, at $2.00 600 .00 



Cofferdam 800 . 00 



Incidentals and foundation contingencies 8,600.00 



Forebay, etc.: 



Excavation, concrete walls, trash racks, etc 



Diversion line: 



Canal excavation and lining, 8 feet by 30 feet by 



41,000 feet, at $30.00 



Headgates, penstocks, etc.: 



4 sliding headgates, set in place, at $900.00 



4 hydraulic relief valves, in place, at $1,200.00. . . . 

 1000 feet ft-inch steel penstock, 10 feet diameter, 



450 pounds, per foot at 6Jc., $29.25 



1000 feet i-inch steel penstock, 9 feet diameter, 



440 pounds, per foot at 6Jc., $28.60 



1000 feet, A-inch steel penstock, 8 feet diameter, 

 500 pounds per foot at 7c., $35.00 



Power-house and draft tubes: 



Power-house, reinforced concrete, 27,100 H.P., at 

 $5.00 per Kw 



Summation 



Engineering and contingencies, 25 per cent 



Interest during construction, J of 2 years, at 4 per 

 cent approx 



Hydro-electrical machinery: 

 4 horizontal water-wheel units, in place, 9091 H.P., 



speed 360 R.P.M., at $31,000.00 



4 7000-Kw. generators, 365 R.P.M., at $5.00 per Kw. 

 Exciter turbines and exciters, in place, at 80c. per 



Kw 



Transformers, at $4.00 per Kw 



Switchboard and accessories, cables, etc., at $2.25 



per Kw 



Traveling crane, 40-ton 



Quarters, water supply, etc 



Summation 



Engineering and contingencies, 20 per cent 



Interest during construction, 2 per cent approx 



Total construction cost 



Total amount of power, E.H.P., 36,363. 



Construction cost, per E.H.P 



Assumed right of way cost, per E.H.P 



Cost of development, per E.H.P 



$20,000.00 



25,000.00 



1,230,000.00 



3,600.00 

 4,800.00 



29,250.00 

 28,600.00 

 35,000 . 00 



101,250.00 



135,500.00 



$1,511,750.00 

 377,938.00 



80,312.00 

 $1,970,000.00 



124,000.00 

 140,000.00 



21,680.00 

 108,400.00 



60,975.00 

 15,000.00 

 20,000.00 



$490,055.00 

 98,011.00 

 11,934.00 



600,000.00 

 $2,570,000.00 



70.67 

 5.00 



$75.67 



