From DTE Energy regarding tree trimming in 2021:
DTE Energy will be preforming tree trimming some time in 2021 to help improve electric reliability in your community. Our customers on this circuit(s) will receive a phone call when our planners will be out in the area. If the customer is not at home when we are evaluating their property we will leave a door hanger with contact information for the property owner.  Please let your public safety teams know that our tree trim contractors will be in your community and may be on residents’ properties as they plan and execute their work –  they will be wearing high-visibility vests and carrying ID badges.

DTE - Commerce Tree Trimming Map - 2021