The normal source of power for the Kewaunee River device was 

 a 60 cycle commercial power line* A distribution transformer supplied 

 110 VAC to fuse and switch boxes,, the autotransformer, and the gasoline 

 engine-driven, 5, 000 watt, AC generator, which served as the emergency 

 source of power. All of this equipment was housed in a small building. 

 The generator unit was equipped with automatic starting controls and 

 connected to both the normal source of line power, and the electro- 

 mechanical weir in a manner such that immediately upon failure of line 

 power the generator started automatically and provided an uninterrupted 

 flow of power to the weir. The generator unit was also equipped with a 

 battery charging circuit which automatically maintained the starting 

 batteries at full charge at all times. 



The generator building also contained electrical outlets for 

 the continous operation of red warning lights mounted over the electro- 

 mechanical weir, and for the operation of floodlights as an aid to visual 

 observation of the sea lamprey runs during the hours of darkness. 



(2) Squaw Creek electromechanical weir and trap . —The Squaw 

 Creek electromechanical weir was of essentially the same design as the 

 Kewaunee River installation (Fig. 8). It differed from the latter in only 

 the following respects: Each of the three rows of the array consisted of 

 11 or 12 electrodes, 5 feet long, which were made of 3/U-inch 0. D. , thin- 

 walled conduit) the electrodes were hung on 3~foot centers and the inter- 

 val between adjacent rows was 3 feet. The above indicated reductions in 

 spacing were effected in order to maintain voltage gradients in the array 

 at the same level as those resulting from the use of 1-1/2 inch diameter 

 electrodes spaced on U-foot centers. 



Squaw Creek was Ul feet wide at the point of installation and 

 average water depth varied from 6 to 18 inches during the period of oper- 

 ation. Unlike the Kewaunee device, the Squaw Creek array was installed 

 directly across the stream at a 90=degree angle to the direction of water 

 flow. An electrically shielded trap was located at midstream, directly 

 under the supporting rails. Electrodes in the center of the array were 

 removed to accommodate the trap. 



Electrical circuitry was identical with that of the Kewaunee 

 River device.? three connections were made to the array, one for each row 

 of electrodes. In all experiments conducted at the Squaw Creek site, the 

 electrode spacing was fixed at 3 feet. With 110 VAC applied to the "A" 

 (upstream) row, the array was tested with 55 VAC or 110 VAC applied to 

 the "C* (downstream) row ("B" row serving as common connection). 



Two 3.500 watt gasoline engine driven generators housed in a 

 small building, together with fuse and switch boxes and a 2 % 1 stepdown 

 autotransformer, provided an uninterrupted supply of power to the weir. 

 One of the generator units operated as the normal source of power, while 

 the second unit served as an automatic emergency source of power ("standby" 



16 



