OF HYDRO-ELECTRIC POWER PLANTS 



709 



ESTIMATED COST OF A 6000-H.P. DEVELOPMENT OPERATING 



UNDEB A 27-FOOT HEAD 



This development is assumed to comprise two 3000-H.P. 

 vertical-shaft turbines driving two 2500-Kv.A. (2000-Kw., 0.8 

 P.F.) 2300-volt generators operating at a speed in the neigh- 

 borhood of 75 to 80 R.P.M. Two three-phase transformer units 

 of capacities corresponding to the generators are provided, the 

 high-tension transmission voltage being 33,000. Provision is 

 also made in the building for future installation of a third gener- 

 ator as well as a transformer unit. It is intended that this plant 

 is to be erected in connection with an existing dam on a navigable 

 stream, thus doing away with the necessity of any pipe line or 

 similar structures to carry the water to the power-house; neither 

 do the figures include any allowance for dam or spillway. 



COST ESTIMATE 



Electrical equipment $80,000 



Delivery and erection 7,500 



vo* jOvJU 



Hydraulic equipment 55,000 



Delivery and erection 5,000 



60,000 



50-ton crane, oil and water piping and misc. equipment 

 in place 8,500 8,500 



Concrete foundations, hydraulic tubes, headrace, etc ... 55,000 



Building, exclusive of foundation 32,000 



Excavation '. . 6,000 



93,000 



5 miles double-circuit line on steel towers 35,000 35,000 



Contingencies (10 per cent) 28,400 



Interest and insurance during construction 15,000 



Engineering and superintendence 20,000 



Total $347,400 



Per H.P $58.00 



Per Kw 87.00 



ESTIMATED COST OF A 6000-Kw. HYDRO-ELECTRIC DEVELOPMENT 

 OPERATING UNDER A 47-FooT HEAD 



This development contemplates a hollow reinforced con- 

 crete dam, 465 feet long and about 55 feet high, including spilling 

 and sluiceways. An intake structure with controlling devices is 

 to be provided in connection with the dam and the water is from 



