SelecTree: Utility Zones Glossary

RESIDENTIAL


Low Zone Distribution

The Residential Low Zone extends 20 feet out from electrical wires. In general, tree planting within the "low zone" is not recommended by utilities, and should be avoided. If plantings are selected, heights are limited to a maximum of 25 feet. It is important to recognize that pruning and/or removal may eventually become necessary to ensure safe and reliable electric service, and also maintain compliance with State Laws. Planting directly under conductors especially near the middle of a span should always be avoided.

Utility Friendly Tree Look for the "utility friendly" icon for trees filtered for this zone's requirements.

Medium Zone Distribution

The Residential Medium Zone extends 30 feet out from the Low Zone (see above). Tree planting selections within the "middle zone" should recognize proximity of utilities in relation to tree height, root structure and canopy width upon maturity. If tree plantings are selected, heights are limited to a maximum of 35 feet. It is important to recognize that pruning and/or removal may eventually become necessary to ensure safe and reliable electric service, and also maintain compliance with State Laws. Planting trees that will become tall enough to target or "fall into" the power lines should always be avoided in this zone.

Tall Zone DistributionMedium Zone Distribution

The Residential Tall Zone begins 50 feet out from electrical wires. There is no stated maximum tree height in this zone, but failure of trees with the ability to reach energized conductors (utility wires) is of primary concern. Eventual topping or removal may be required to ensure safe and reliable electric service, and also maintain compliance with State Laws.

RIGHT OF WAY


Wire Zone Transmission

The Wire Zone under Transmission lines extends 10 feet out from conductors. Maximum vegetation height in this zone is 3 feet. SelecTree doesn't offer listings for this zone. In general, tree planting within the "low zone" is not recommended by utilities, is frequently in conflict with the easement, and should be avoided. If plantings are selected, it is important to recognize that removal may become necessary to ensure safe and reliable electric service, and also maintain compliance with State Laws.

Medium Zone Transmission

The Right of Way Border Zone extends 40 feet out from the Wire Zone (see above). Maximum vegetation height in this zone is 10 feet. SelecTree doesn't offer listings for this zone. Tree planting selections within the "middle zone" should recognize proximity of utilities in relation to tree height, root structure and canopy width upon maturity. If tree plantings are selected, it is important to recognize that removal may eventually become necessary to ensure safe and reliable electric service, and also maintain compliance with State Laws. Planting trees that will become tall enough to target or "fall into" the power lines should always be avoided in this zone.

Tall Zone Transmission

The Right of Way Outer Zone begins 50 feet out from conductors. There is no stated maximum tree height in this zone, but failure of trees with the ability to reach energized conductors (utility wires) is of primary concern. Eventual topping or removal may be required to ensure safe and reliable electric service, and also maintain compliance with State Laws.

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Eucalyptus rudis - photo

Eucalyptus rudis

Hardiness estimate: 12-18 degrees F…

Photo by R. Baldwin, M. Ritter and J. Reimer