i86 FENCING AND DRAINING 



feeders need not be so large as the main drain or leaders, and 

 are usually about 2 feet deep, and 1\ feet wide at the top ; 

 these run to all parts of the area. A fall of about i foot in 

 every 100 feet should be given to all drains, with rather more 

 on very stiff soils. 



The ditches should be dug in the driest part of the year, 

 and the earth taken out should be thrown over the surrounding 

 land, as if left on the side of the drain it may fall in again. 

 Wherever the drain has to pass under a ride or road a culvert 

 must be made, or a pipe can be used. 



Care must be taken to periodically clean out all ditches or 

 they will get filled up with dead leaves, &c., and will be use- 

 less. 



Webster in Practical Forestry gives the following as being 

 approximately the average cost of draining : 



Ditches 3' wide at top, 2' 6" deep, and 9'' wide at 



bottom 3/- to 4/- per chain. 



Scouring out ditto 9^. to I/- per chain. 



Small ditches 15" to 18" wide at top, 12" to 13" 



deep, and 9" wide at bottom 1/6 to 2/6 per chain. 



Scouring out ditto 6d. to <)d. per chain. 



