I am looking to bury both my main power line and my ethernet lines. I already started the process on both.
When I purchased my home, the meter was in the back of the house with overhead lines, but I wanted to move the meter to the side of my home and bury the lines, as this would allow me to extend my deck across the back of my home. I installed the new meter and connected my electrical panel to it. The electricians added a "jumper" cable to the old meter area temporarily. My local electrical utility (DTE Energy, Michigan) will remove the overhead line, the temporary jumper, the old meter, and bury the line to the new meter, adding some green box in the back corner of my property.
Simultaneously, I added a new coax cable for internet to the side of the house as well. I want this buried for the same reason, so I can extend the deck along the back of my home and have a nice clean buried cable look.
I also plan to add landscape lighting and a sprinkler system for my landscaping, with the possibility of adding outdoor speakers. So, I need to keep in mind those things will also need conduit.
I'm not sure the best path to trench for the power line and ethernet lines. I've added photos of my current situation for clarity. My worry is making sure high voltage is not going to interfere with low voltage and I also want to avoid having to tear apart my landscaping if access is ever needed. Though, what is the likelihood of something happening where the buried lines will need to be accessed? If it is practically zero, maybe it's best to bury them along the fence line right behind my landscaping? Also, does it make sense to trench, bury the power lines, then have a shallower trench for my ethernet lines above my power lines? I know I need to keep them around a foot apart (high voltage, low voltage).
I'm also clueless on arbor vitae and various types of trees that I would worry about having buried lines nearby. Will they eventually grow roots so much they interfere with or ruin my buried lines?
One other thing to note, even though my side neighbor (not back neighbor) is planning to add a garden, it won't extend all the way to the corner, so I'm going to ask him if I can put the green box required for the power line on his property at corner near the utility pole, as one of the other reasons I wanted to move my meter and ethernet access was to avoid having the utility company going into my back yard and he doesn't plan on fencing his back yard up, nor does the neighbor behind him.