I guess I don't follow Valleyman's comment about near by floral sources. I've got a group almost beneath some mainline transmission lines with floral sources all around. Remember, they do travel quite some distance foraging. The problems I see: possible chemical application, but none of the transmission lines that I know of get that treatment out here, your areas may be different. Second, if/when the lines need maintenance, the bees could be a deterrent to the maintenance or repair crews. Our line service crew expressed some disappointment with my hives right under some lines serving a handful of irrigation wells... the meter reader wasn't upset, he's a customer and he was closer to the action than the crew regularly. Third, the EMF scare scenario is bunk... I'm with Bud here. Probably other reasons not to be concerned, but it's late. Happy Independence Day, one and all.