96 THE AXGLER AND HUNTSMAX 



constructed that it can not be washed out during freshets, 

 should be inserted in the intake to keep undesirable fishes 

 out of the pond. For the diversion of the water from the, 

 stream to the pond it will be found necessary in many cases 

 to construct a small dam which should be located from 10 to 

 20 feet downstream from the point of intake. It should 

 be the exact height required to accomplish the desired ob- 

 ject and strong enough to withstand flood waters. Make the 

 intake sufficiently wide and deep to accommodate the flow 

 to the pond, and for its protection install below its mouth 

 a slat rack placed at an angle of approximately 60 de- 

 grees and facing downstream. In this position the water 

 will flow past the outside edge and return to the rack, caus- 

 ing most of the floating debris and ice to pass instead of 

 lodging against it. 



"For the interception of floating particles a galvaniz- 

 ed iron screen with 3 to 4 meshes to the inch, is installed on 

 a frame set from 18 to 24 inches back of the rack. The gate 

 is placed 12 to 18 inches below the screen and is used to 

 regulate the flow of water. 



Selection of The Pond Site: 



"Care should be taken to choose a location that will be 

 free from inundation and surface drainage. If possible, 

 sandy, or porous soil should be avoided; but, if there is no 

 alternative, the bottom of the pond may be covered to a 

 depth of from 4 to 5 inches with clay, which should be 

 spread evenly over the bottom with a garden rake. Water 

 is then turned on and the clay is tamped and puddled until 

 it is impervious to w^ater. If the trout are to be held under 

 natural conditions, gravel and sand should be placed on top 

 of the clay near the intake and around the shores of the 

 pond to a depth of 18 to 36 inches below the water surface. 



"If the pond can be located a few hundred feet below 

 the intake, making practicable a supply ditch several 

 feet wide and 6 to 18 inches deep, a most excellent spawning 



