TESTS OF DRAINAGE PUMPING PLANTS. 
53 
1919 and adding an annuity on a basis of 4 per cent and that will re- 
place the plant in 20 years, amounting to $33.58 per $1,000. The life 
of a pumping plant depends largely on the grade of machinery used 
and the care it receives. It is believed that the limits of 15 to 20 years 
5.50 
5.00 
8 
£ 4.00 
£ 
0)3.50 
^3.00 
S 
E.00 
Steam s/ide-va/ve.non-condensing. 
Simp/e non-condensing Cor/iss. 
Compound condensing Cor/iss 
Internal Combustion Engine, Oil at 9 cents per ga/. 
Internal Combustion Engine, Oil 'at 3£ cents per gal 
Fig. 
I 2 3 4 5 6 7 
Thousands of Acres in Project 
-Total cost per acre per year, of drainage pumping plants of various types in Louisiana, 
including fuel, supplies, labor, and fixed charges. 
will cover most cases, although occasionally a pumping plant will not 
last more than 10 years, while another under favorable circumstances 
may last 25 years. 
