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ical survey and plan should be made to aid in 

 establishing the system of drainage. This plan is also 

 useful both for farming purposes and for landscape- 

 gardening. Having decided upon the outfall for the 

 drain system, and the position of main, sub-main, and 

 minor drains, as to their direction, distance apart, 

 depth and grades, the whole should be staked out on 

 the ground. The work may be let out by contract 

 to be done under direction of the engineer ; or men 

 may be employed by the day under a competent 

 overseer who attends to all details of the work, giving 

 grades, etc., and who is employer and pay-master 

 of the men. Much of the work on grounds of small 

 area may be done by farm hands, under general 

 direction of the engineer. Materials for the work 

 can usually be procured by the engineer at a lower 

 rate than by other parties. After the work is 

 completed, a careful plan of the whole should be 

 made, so that after the plough shall have obliterated 

 all traces of the drains from the surface, any point in 

 the system may still be easily found by means of the 

 plan. 



