Small Trees for Planting Near Power lines
Utah State University Extension
Tree experts and utility companies suggest that people plant trees with a mature height of 25 feet or less near power lines, with taller trees kept farther away. Though taller trees are sometimes acceptable near power lines, they usually need drastic pruning to keep lines clear, which can be expensive and unsightly. See Figure 1 for guidelines on mature tree height and spacing away from overhead power lines.
Olsen, S., J. Gunnell, M.R. Kuhns, and A. Barnhill. 2009. Small trees for planting near power lines. USU Extension Fact Sheet 2009-01pr. 7 pp.