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Pigijre 8. — An inexpensive pond outlet gate which can be constructed 

 with materials on hand. 



The type of construction that should be used is a 

 matter of preference. The solid wall provides a tight 

 outlet with an easily manipulated outlet gate. On the 

 other hand, the dam-boards or stop-logs can be removed 

 at will and the water level can be kept at any desired 

 point in the pond. It is also true that when the pond 

 is being drained, if an irrigation or other gate is 

 used, the total pressure of the water is against the 

 screen and should it become blocked with debris (as is 

 generally the case), the screen may be broken. If dam- 

 boards are used, they are removed one at a time and the 

 pressure is only the depth of the flow over the board: 

 screens seldom become entirely blocked and are never 

 broken by pressure; also, there is no loss of fish by 

 great pressure against the screen. 



