FARM DEVELOPMENT 



consideration at one time, the main drain and the prin- 

 cipal laterals cannot be fully decided upon, either as to 



ir 



ir 



Figure 80. A "section," 640 acres, of level land drained by surface drains. 



location or depth, until the laterals have been sufficiently 

 measured or inspected to determine whether they will 

 properly discharge water into their mains. In case of 



