I worked 40+ years with R&D electronics... I worked with EMF ( electrical magnetic fields ) early on.. One of the things we would do ( away from work ) was to take an eight foot Fluorescent Light bulb down to the river and fish under the power lines running across the river and it would light up enough that we could see to fish and find the opener for our beer bottles... Back then (late 50's) the power line were not as high as today....
EMF excites the neon gas in the bulb... the closer you can get to the source of the emf the brighter the light -- I.E. you would have to be within 10-15 feet of the actual power lines for full brightness --- Which YOU DON"T WANT TO DO !!!!!!
But, to answer the original question = MAYBE... But most likely the brush and debris pushed into the lake from the crews that cleared the area, for the towers to be installed, is why the fish are in the area..