708 ECONOMICAL ASPECTS 



ACTUAL COST OF A 4800-H.P. DEVELOPMENT OPERATING UNDER 



90 FEET HEAD 



This plant was designed to utilize the water flowing from a 

 large storage reservoir primarily built for domestic and industrial 

 service. It comprises four 48-inch cast-iron penstocks discharging 

 into four 1200-H.P. horizontal turbines, each direct-connected to 

 a 1000-Kv.A. (800-Kw. 0.8 P.F.), 60-cycle, 13,200-volt generator 

 operating at a speed of 400 R.P.M. The exciter equipment con- 

 sists of two 60-Kw. turbine-driven units. 



The first cost of the installation was $227,474, itemized as 

 follows : 



Station building $113,786 



Foundations of turbines and generators 7,883 



Total station cost $121,769 



Turbines and generators $70,574 



Labor and materials 5,043 



Penstocks and valves 1,375 



Venturi meters 6,212 



Traveling crane 2,500 



Total equipment $99,704 



Lightning arresters and outgoing line equipment 6,001 



Total $227,474 



Per H.P $47.50 



Per Kw 71 .00 



FIXED CHARGES AND OPERATING EXPENSES (YEARLY) 



Labor, 1 electrical engineer, 1 operator, 2 helpers, 1 helper part time $5,531 



Fuel for heating building 86 



Repairs and appliances 354 



Oil and waste 87 



Small supplies 262 



Taxes 2,675 



Interest at 6 per cent 11,374 



Depreciation, station and machinery, 4 per cent 4,475 



Depreciation on transmission equipment, 2 per cent 120 



Total $24,964 



Daily output in kilowatt-hours 18,000 



Total cost per kilowatt-hour . . 46 cent 



