Also, 'voluntary easement' is interesting. I'm assuming they are compensated for the easement as the easement can devalue their land and typically the easement runs with the land and should be a permanent easement.
There is actually case law where, depending on the type of sale, the easement could be removed and the landowner could remove the pipeline from their property.
Interesting arrangement.
During a recent battle with Big Wind, we learned that the property owners signing the leases were under a gag order to keep others from knowing what the lease agreements were.
A prominent farmer in our area told me that he wanted no wind turbines on his properties, but was willing to lease them a 60 foot easement across the back of his farm for underground transmission lines.
When his lawyer got to looking over the lease agreement, he found that doing so would grant the developer partial control over the entire farm, not just the 60 feet, should they so choose.
He got it changed, and then moved miles away from the project