I ran into this, this evening
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The job was to remove two maples that have seen years of storm damage and had large dead, rotten, and hollow limbs. He needed them removed today as we are expecting bad weather tomorrow and the last storm broke the limb in the pic and ripped the data wire off the house.
I did call the utility company to have them drop this due to the chances of a piece of deadwood breaking and falling on the wires. They were not available until tomorrow so I made the decision to work around it. Basically I followed my game plan that I typed out earlier in this thread, made small cuts and made sure to cut any forks out of the brush that might try to catch on the wire. Everything went great, just needed to have a little extra care when I was cutting near the wires.