.COST OF HYDRO-ELECTRIC POWER PLANTS 



707 



ANNUAL COST OF OPERATION 

 Overhead charges: 



Yearly installment of principal and interest. Debenture 



to be retired in thirty years at 5 per cent $4,875 



Maintenance account, being an amount set aside yearly 

 against major repairs, renewals and reasonable ex- 

 tensions, 2 per cent 1,875 



Operating charges: 



Salary, superintendent and general office expenses 



Wages of operators at power station 



Supplies and minor repairs 



$2,000 



2,200 



900 



$6,750 



Total annual cost 



Or approximately $20 per Kw.-year. 



- $5,100 

 . $11,850 



MUNICIPAL HYDRO-ELECTRIC PLANT OF CITY OF STURGIS, MICH. 



Capacity, 1100 Kw. 



This development consists of a hollow reinforced concrete 

 spillway dam, 308 feet long and 24 feet high. This spillway con- 

 nects with an earth embankment 400 feet long and 24 feet high. 

 The power-house contains two 550-Kw. 2300-volt generators 

 driven by two 844-H.P. turbines, and a 40-Kw. exciter driven by 

 a 67-H.P. turbine. The head is 22 feet. Six 200-Kw. oil-cooled 

 transformers for stepping up the voltage to 22,000 are provided, 

 also complete switching equipment and lightning arresters. The 

 ultimate development will include two additional generating units 

 and one additional exciter. 



COST DATA BASED ON ULTIMATE DEVELOPMENT 



