I'm an EE who took a fair amount of courses in AC power. Battelle Labs (at the Pacific Northwest Labs or PNL in Richland) did a study a number of years back where they raised animals directly underneath high-voltage transmission lines (generally 100,000 VAC and above), compared to other animals in the same area but farther away from the power lines, with all other conditions being equal. The animals that were raised directly underneath the lines had stunted growth as I recall.
Now whether there is any issue with fully-grown animals (including humans) being affected in the long-term, I'm not aware that there is any hard evidence. But if you have a choice, why take the chance?
I suspect that you are talking about the transmission lines that run north-south along 124th Ave NE, correct?