718 



ECONOMICAL ASPECTS 



OAK SPRINGS POWER SITE 



Estimate of Cost: 



Power head 32 ft. 



Flow used for estimate 3,700 c. f. s. 



Brake horsepower (80 per cent eff.) 10,824 (8100 Kw.) 



Dam: 



Total height, 50 feet; length of crest, 480 feet; 

 length of spillway, 200 feet. 



Masonry, 15,310 cubic yards, at $9.00 $137,790.00 



Excavation, 6443 cubic yards, at $1.25 8,054.00 



Cofferdam 70,000.00 



Incidentals and special foundation contingencies ... 34,156 .00 



Forebay, etc.: 



Excavation, 12,000 cubic yards, at $1.25 15,000 .00 



Concrete walls, 1500 cubic yards at $10.00 15,000.00 



Trash racks, 12,000 pounds steel, at 5c 600 .00 



Stop logs 400 .00 



Headgates, Penstocks, etc.: 



10 sliding headgates, set in place, at $750.00 7,500 .00 



10 hydraulic relief valves, in place, at $1,200.00 . . . 12,000.00 

 800 feet &-inch steel penstock, 12 feet diameter, 



530 pounds, per foot at 5c., $34.45 27,560 .00 



$250,000.00 



31,000.00 



47,060.00 



Power-house and draft tubes: 



Power-house, reinforced concrete, 8100 Kw., at $5.00 



per Kw 40,500 . 00 40,500 . 00 



Summation $368,560 . 00 



Engineering and contingencies, 25 per cent 92,140 .00 



Interest during construction, 5 per cent approx 25,300.00 



$486,000.00 

 Hydro-electrical machinery: 



10 horizontal water-wheel units, 1085 H.P., in place, 



speed 200 R.P.M., at $10,000.00 100,000.00 



10 750- Kw. generators, 200 R.P.M. at $8.00 60,000.00 



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



Kw 6,480.00 



Transformers, at $4.00 Kw 32,400 .00 



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



Per Kw 18,225.00 



Traveling crane, 30-ton 9,000 .00 



Quarters, water supply, etc 20,000 .00 



Summation 246,105.00 



Engineerng and contingencies, 25 per cent 61.525 .00 



Interest during construction, approx 6,370 00 



314,000.00 



Summation 800,000 . 00 



Railway, realignment, 8 miles, at $50,000.00 400,000.00 



Total, construction cost $1,200,000 . 00 



Total amount of power, E.H.P., 10,824. 



Construction cost, per E.H.P 110 . 87 



Assumed right of way cost, per E.H.P 5 . 00 



Cost of development, per E.H.P $115.87 



