84 
BULLETIN 126, U. S. DEPARTMENT OF AGRICULTURE. 
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Cost includes back fill; see p. 80. 
f(i-in. drain tiling used below a portion of the 
\ lining. 
Cost of concrete in place, $12.50 per cu. yd.+ 
7 per cent for engineering. 
Water per cu. yd. concrete, $0.39; not first- 
class construction. 
Contract for mixing and laying, $0,025 per 
sq. ft. 
Work done in cold weather; heating required. 
49,494 lin. ft. of canal lined, at $32.05 per cu. 
yd. of concrete in place, or $7.42 per lin. ft. 
of lining. "Work in rough country. 
Total 
cost 
per 
square 
foot of 
lining. 
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Washington. 
Northern Pacific Irrigation Co., 
Washington. 
Yakima Project. U. S. Reclama- 
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