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Tree trimming near power lines


Line clearance tree trimming

Trees are a natural, beautiful part of our environment in the Pacific Northwest. But they are also the number one cause of power outages. Branches can cause outages when they fall or grow into power lines. To maintain safe, reliable power, we trim and selectively remove trees all year round.

We utilize the latest industry standards for Utility Vegetation Management to comply with federal, state, and local regulations. In most cases, we apply the directional pruning method to encourage growth away from the lines.

For your safety, tree work within 10 feet of a primary conductor needs to be performed by a qualified electrical worker!


Prior to tree work (except emergencies), we will dispatch an ISA Certified Arborist to evaluate lines and identify necessary vegetation maintenance. The PUD will then notify landowners (via door hanger, mail, phone, email or postcard) of our intent to trim. If removal of a tree is deemed necessary, the Arborist will discuss this with the landowner and request a signed authorization form.

At that point, a tree-trimming crew will be scheduled. If it’s a large project, a crew may not be scheduled for several months. When tree crews are in your neighborhood, they’ll be working both in the road and from private property. Tree crews may ask for the work area to be cleared including cars, flower pots, yard ornaments, etc. Tree work may also require flagging a lane of traffic.  We appreciate your patience during these vital activities to ensure we can deliver reliable power.


If you have any questions regarding our tree-trimming work or would like a PUD Arborist to review trees around your lines, give us a call at 425-783-5579 (Monday-Friday, 7 am to 3 pm) or email us at Please note that the PUD does not maintain vegetation around service lines or standalone communication lines.

There are various ways to trim trees growing into power lines, depending on the position of the tree:

Tree growing into power lines
Tree growing into power lines
Crown reduction (AFTER)
Crown reduction (AFTER)
Trim to specs (AFTER)
Trim to specs (AFTER)

Watch our video:

Right plant, right place

For more information about selecting trees to plant around power lines, please view our Tree Booklet as well as our Native Plant List.