Mance: Quarry Industry of Southern Indiana 



107 



A steam plant of the same size would cost about $16,000 

 with a total power cost of 110,000 per year, or about 2 cents per 

 kilowatt hour. 



The same authority divides these costs up as follows: 



Engine and foundations S5 , 980 . C 0 



Boilers and pumps 5 , 770 . 00 



Generator and switchboard 3 , 250 . 00 



Stack, etc 1,000.00 



Total $16,000.00 



Fixed charges at 14 per cent $2,240.00 



Labor 1,890.00 



Fuel, oil, waste, etc 4,990.00 



Repairs 880 . 00 



Total ; $10,000.00 



The cost per kilowatt hour was calculated on a 66 2-3 per 

 cent load for 300 days of 10 hours each, as 2 cents per kilowatt 

 hour. 



I corresponded with a number of the manufacturers of power 

 machinery, and they submitted the following figures on installa- 

 tions of this size: 



Water-tube boiler with stack, including transportation to Bloom- 



ington, Ind., and complete erection of the same $4,550.00 



Engine with foundation and pumps delivered 5, 170 .00 



Water heater, piping, etc 750 . 00 



Generator switchboard and wiring 5 , 100 . 00 



Total. $15,570.00 



With the lower cost of coal and labor in Bloomington and the 

 shorter run of the stone mill, and 2,000 working hours per year, 

 the total power cost would not exceed $6,290 per year. 



At 500 kilowatts the steam plant would cost about $31,000, 

 with a power cost of about $12,000 per year, and the oil engine 

 with generator would cost about $58,000 with a power cost 

 shghtly under $10,000 per year. The high cost of bituminous-gas 

 producers makes their use poor economy in small installations, 

 but by the time 500-kilowatt plants are reached they begin to 

 compete successfully with the steam and oil plants. A large 

 producer-gas machinery manufacturing company submitted the 

 following figures on a plant of 500 kilowatts, with four engines, 

 including three of 200 horse-power and one of 100 horse-power: 



