These are not universal rules. These are based on our area provider: East Central Energy in Cambridge, Minnesota: http://www.eastcentralenergy.com/selectingtherighttree.aspx
| Selecting the Right Tree to Plant |
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Planting adjacent to overhead power lines
You can help minimize tree-related outages and ensure reliable electric service for the future by choosing the right species of trees. Consider the trees’ mature height and crown spread, especially when planting adjacent to overhead power lines. Avoid planting directly underneath power lines. Make sure any tree planted within 20 feet of neighborhood power lines is a variety that will grow to a mature height of 15 feet or less. Small trees such as flowering Techny arborvitae, dogwood or nannyberry are ideal for these locations. Plant taller trees farther away to ensure they can’t grow into power lines. At distances of 20 to 50 feet, plant trees that grow to a height of 40 feet or less. If you want to plant a tree that grows tall, such as a maple, oak, pine or spruce, make sure it’s at least 50 feet from the nearest residential overhead lines. When you select trees, consider how you plan to use the site, as well as area safety needs. Download Plant Wisely brochure for more information.
Tips for safe planting around pad-mounted transformers
Planting for energy conservation By planning a well-landscaped yard, you can have a real impact on your home heating and cooling costs. Deciduous trees planted to the west and east of your home will help keep it cool in the summer and allow solar benefits in the winter. Trees function as natural air conditioners. As water is drawn from the ground to the leaves, water vapor is released, cooling the surrounding air. Evergreen trees along the north side can reduce the cooling effects of winter winds. Download the “Save Energy with Trees” guide provided by the Minnesota Department of Commerce Energy Information Center for more information.
Whether you’re looking for more summer shade, an effective windbreak or just to enhance the beauty of your property, start by selecting the right tree for your location. Consult with your local nursery, or local Soil Water Conservation District (SWCD) office or your county agricultural extension agent. If your planting area has power lines near by or if you have any questions, call the toll-free number below to reach our Forestry Services Staff, or feel free to contact us via email with your concerns or inquiries. Trees or Vegetation Questions – 1-866-293-9068 Tree Owner’s Manual Call before you dig To locate underground utilities contact: |
Taken directly from: http://www.eastcentralenergy.com/selectingtherighttree.aspx
BlueHouse Garden 
FYI: East Central Energy the power line owners in Cambridge have informed me of several things.
1. a self-maintenance agreement must be filled out every year – even if a previous agreement was for the lifetime of your property.
2. self-maintenance must be completed by June 1st.
3. once tree service people are in your area, they can charge you a maintenance fee of .98¢ per span (between poles) to NOT use herbicides.
4. if a box elder tree is growing within a certain distance of their lines, even if this tree is less than 5 feet tall and growing in the middle or your garden, they can spray it with herbicides.
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