Installation of first experimental 

 electromechanica!T~weir and trap in 1951 



Daring the period May 2 - May 9, 1951, an experimental 

 electromechanical weir was assembled and put into operation in the 

 Ocqueoc River, Presque Isle County, Michigan, immediately downstream 

 from the mechanical weir and traps in that river (Figs. 1 and 2). 

 A 25 KVA generator was set up in a cabin on the west bank of the 

 Ocqueoc River adjacent to the mechanical weir. Power transmission 

 lines were strung from the generator to a wire lead distribution 

 platform positioned a few feet above the midpoint of the- weir. 

 Manipulation of individual leads to each electrode could be accom- 

 plished at this platform. 



Figure 1. Experimental electromechanical weir and trap installed in 

 the Ocqueoc River in 1951. 



