48 



BULLETIN 1067, U. S. DEPARTMENT OF AGRICULTURE. 



Plant capacity was rated on a velocity of 10 feet per second at the 

 discharge flange of pump. The capacities of the various plants as 

 shown by the test are also included. The capacity of plant in acres 

 drained was next computed on the basis of 1.25 inch removed in 24 

 hours. 



In selecting engines a limit is set by the size of engines of certain 

 types. Slide-valve steam engines may be had in almost any size 

 or capacity, while Corliss engines are not made in small sizes. It 

 would therefore be impracticable to decide to use a Corliss engine 

 on a proposition so small as to demand special design. 



Distillate and oil engines of medium grade are not made by some 

 firms in sizes above 100 to 125 horsepower. To use an internal- 

 combustion engine in a pumping plant of large capacity with cor- 

 respondingly large units would mean the selection of a Diesel or a 

 semi-Diesel engine, both high-grade engines, costing considerable 

 more per horsepower than the medium-grade engines using distillate. 



The original costs of pumping plants and the years they were 

 purchased are shown in Table 39. In using the data contained in 

 this table, however, it must be borne in mind that prices of all ma- 

 terials and equipment of pumping plants have advanced materially. 

 The average plant would probably now (1920) cost as much as 75 

 to 100 per cent more than before the war. 



Table 39. — Costs of pumping plants. 



Name of plant. 



Cost. 



Cost per 

 acre. 



Year con- 

 structed. 



Phillips Land Co 2,500 



Subdistrict No. 1, Lafourche drainage district No. 6 1, 880 



Subdistrict No. 3, Lafourche drainage district No. 12 2,250 



Jefferson drainage district No. 3 5, 000 



Subdistrict No. 1, Gueydan drainaee district j 7, 500 



Subdistrict No. 2, Avoca drainage district 4, 350 



Subdistrict No. 3, Avoca drainage district 11, 250 



Subdistrict No. 4, Jefferson drainage district No. 4 _ 1, 800 



Fayport subdistrict No. 1, Lafourche drainage district No. 9 - . . 2, 000 



JJalcour drainage district 650 



Subdistrict No. 1 Lafourche drainage district No. 12 835 



Subdistrict No. 2 Lafourche drainage district No. 12 940 



Subdistrict No. 4 Lafourche drainage district No. 12 4,240 



Little Woods tract 6, 943 



Port Arthur 5, 720 



Ferre relift 



Richhard relift 



Hine's relift 



S15, 000 

 10, 000 

 13, 500 

 28, 000 

 40, 000 

 34, 000 

 73, 000 

 18, 000 

 14, 000 

 10, 000 

 10, 500 

 12, 500 

 31,500 

 37, 500 

 54,290 

 20. 000 

 15, 000 

 8,000 



S6.00 

 5.32 

 6.00 

 5 60 

 5.32 

 7. SI 

 6.48 



10.00 



7.00 



115.40 



12.57 



13.30 

 7.42 

 5.39 



2 9.50 



1911 

 1912 

 1910 

 1912 

 1912 

 1911 

 1913 

 1915 



1913 

 1915 

 1915 

 1913 

 1913 

 1918 

 1918 

 1918 

 1918 



1 Acreage will be considerably increased later. 



2 Plant costs more than it would for an agricultural proposition, as two units must lift water 11 feet i 

 occasion demands it. 



GRAPHIC SUMMARY. 



Figure 5 shows the pounds of oil per foot-acre-foot of water 

 pumped, plotted against the lift in feet. The several curves repre- 

 sent different types of plant. While, in some instances the data 

 were sufficient to define the cmwe accurately, in others the exact 

 definition was a matter of judgment. The amount of fuel shown is 



