This is dangerous work. Here is what I would likely do. It is but one possibility and puts the feller at risk. The pull on the green line must assure that there is no trunk movement.It's dead with limbs and bark falling off. It's about twelve inches in diameter at the base. It's been dead about a year, broken over for several months. The live electrical equipment nearby makes it a little harder.
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Is there any way to do it safely without grapple equipment, a crane, or a bucket truck?
Thankfully, it's not on my property.