INLAND DRAINAGE 



119 



either side and may also be adjusted as to width of ditch. It 

 comes in various sizes and weighs 290 to 425 pounds. Four to 

 six horses or a tractor are required to operate the largest model, 

 while the smallest may be operated with 2 or 3 horses. It does 

 not, of course, cut accurately to grade. 



Fig. 79. — Implement B. {Courtesy of Owensboro Ditcher and Grader Company.) 



Implement C. — This machine is one of the various types of 

 wheel excavators and, of course, is considerably more expensive 

 than the two machines described heretofore. However, it 

 follows grade very closely and usually makes a perfect ditch at 

 one cut. Only two men as a rule are required to operate it, the 

 average daily operating cost, according to the manufacturers, 

 running from $16.75 for the smallest model to $43 for the largest 

 model. This machine will average half a mile of completed 

 ditch of the usual anti-mosquito type and ordinary size every 

 day according to the manufacturers. 



