I have a situation where a customer needs immediate screening, and I really mean screening as soon as humanly possible. She has a grandaughter that comes to visit quite regularly and the folks that live behind her are basically exhibitionists. No kidding. Currently in place is a 6 foot privacy fence, but unfortunately, her lot is lower and that privacy fence is not blocking view to their deck (hot tub) and bedroom/bathroom windows. The other main factor is that there are overhead power lines running the length of her back yard, 1.5 feet behind the privacy fence on the neighbor's side, approx. 18 feet off the ground at the lowest point in the center. I'm thinking about slapping some Lombardy Poplar's in there, staggered with English Columnar Oaks. Anyone foresee any major issues with doing this? The homeowner is well aware that the Poplar's will most likely need to come down in 10-15 years, but ideally, by then, that will have given the Oaks enough time to provide adequate screening. I feel like a sh** planting trees knowing they will be short-lived, but this owner is desperate. Am I missing any other potential issues with this scenario? The Poplars will be planted 62 feet away from the house, 10 feet away from the fence; there are no underground water mains along the back fence, only overhead power lines on the other side of the privacy fence; there are some drainage issues to the NE corner of the lot that will be corrected before planting. I really hate it when I start overthinking things, but I'm there. Any input is appreciated.