720 



ECONOMICAL ASPECTS 



MECCA POWER SITE 



Estimate of cost: 



Power head 90 feet 



Flow used for estimate 3,400 c. f. s. 



Brake horse-power (80 per cent eff.) 27,760 (20,750 Kw.) 



Dam: 



Total height, 110 feet; length of crest, 650 feet; 

 length of spillway, 160 feet. 



Masonry, 64.787 cubic yards, at $7.00 $453,509 .00 



Excavation, 10,920 cubic yards, at $1.25 13,650.00 



Cofferdam 40,000 . 00 



Incidentals and special foundation contingencies. . 22,841 .00 



Forebay, etc.: 



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

 Stop logs 



600 . 00 

 400.00 



$530,000.00 



1,000.00 



Headgates, penstocks, etc.: 



8 sliding headgates, set in place, at $900 .00 7,200 . 00 



8 hydraulic relief valves, in place, at $1,200.00. . . 9,600.00 



1400 feet &-inch steel penstock, 12 feet diameter, 



530 pounds per foot at 6c., $34.45 48,230.00 



600 feet A-inch steel penstock, 11 feet diameter, 



615 pounds, per foot at 7c., $43.05 25,830.00 



90,860.00 



Power-house and draft tubes: 



Power-house, reinforced concrete, 20,750 Kw., at 



$5.00 per Kw 103,750.00 103,750.00 



Summation $725,610.00 



Engineering and contingencies, 25 per cent 181,402 .00 



Interest during construction, 6 per cent approx 62,988.00 



$970,000.00 

 Hydro-electrical machinery : 



8 horizontal water wheel units, in place, 3470 H.P., 



speed 400 R.P.M., at $10,400.00 83,200.00 



8 2500-Kw. generators, 400 R.P.M., at $6.00 per Kw. 120,000.00 

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



Kw 16,600.00 



Transformers, at $4.00 per Kw 83,000 .00 



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



per Kw 46,687 .00 



Traveling crane, 40-ton 15,000.00 



Quarters, water supply, etc 20,000 .00 



Summation $384,487 . 00 



Engineering and contingencies, 20 per cent 76,895 .00 



Interest during construction, 2 per cent approx 8,618.00 



470,000 . 00 



Summation $1 ,440,000 . 00 



Railway realigned, 6 miles at $50,000 300,000 .00 



Total construction cost $1,740,00 .000 



Total amount of power, E.H.P., 27,760. 



Construction cost, per E.H.P 62 .68 



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



Cost of development, per E.H.P $67 . 68 



