The devices were located in the following streams: (1) 

 Kewaunee River, Kewaunee County, Wisconsin; (2) Squaw Creek, Delta Coun- 

 ty, Michigan; (3) Hibbards 1 Creek, Door County, Wisconsin; and, (U) 

 Carp Creek, Presque Isle County, Michigan. A summary of the equipment 

 and characteristics of these installations follows: 



(1) Ke waunee River electromechanical wei r and trap . — This 

 installation consisted of an array of three rows of electrodes suspended 

 by a system of overhead cables which in turn were supported by a pair of 

 steel poles at each bank (Figs. 5 and 6). Each row was comprised of 23 

 or 2)4 electrodes of 1-1/2 inch standard galvanized pipe, spaced on U8-inch 

 centers, which were hinged to, and suspended from, a 3-inch channel iron 

 rail. Spacings between electrodes could be increased in increments of 2 

 feet for experimental purposes. Electrode lengths varied from 2-1/2 to 5> 

 feet since they were cut to fit the contour of the stream bed. The center 

 row of electrodes was offset 2\\ inches to give a "diamond" or "X" pattern 

 to the electrodes in the total array. 



Figure 5. Electromechanical weir and trap installed in the Kewaunee 

 River in 19^2. 



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