It was evident further from these tests that where sufficiently 

 rapid water velocities exist as at the Kewaunee River and Squaw Creek 

 sites, the use of the more complex incremental electrical fields to 

 create a "warning" zone (to fishes) is not necessary in order to effect 

 satisfactory protection and salvage of fish runs. The use of "warning" 

 zones (through the application of incremental electrical fields) still 

 appears desirable, however, where the electromechanical devices are in- 

 stalled in deep and sluggish stream locations. 



Arrays consisting of a single row of suspended electrodes and 

 a horizontal; submerged electrode formed effective barriers to all lam- 

 prey and fish movement with intervals as great as 6 feet between the 

 suspended electrodes when the horizontal, submerged electrode was placed 

 8 to 10 feet downstream from the suspended elements. Results obtained 

 with this type of array in Hibbards 1 Creek were as follows (power applied 

 to array - 110 VAC); 



(horizontal submerged electrode placed upstream from the sus- 

 pended electrodes) 

 8 U«_o» 2'-0" 1.36 27.5 1,696 Yes 



1/ See discussion, page 2U„ 



35 



