Underwire Trees

What are these trees?

Why does it matter?
  Japanese tree lilac under wires
                                                                      Japanese tree lilac planted beneath power lines
What are some good species for a northeast US urban environment? What varieties should be avoided for underwire planting? Where can I buy the recommended species? Where can I get more information?

Check with your local utility for its list, and with your land-grant institution's urban forestry personnel.  For other information, advice and help on this topic, call offices of your State Urban Forestry Coordinator or University Extension service, or visit urban forestry web sites.