I think the lack of replies in this discussion is owing to two things. I don't know what you mean by "Frac head line" and others may find it confusing and I think the question, framed better, would have a greater chance of receiving informed responses by posting in the Panola County Group.
LOL. Realtors are notoriously agnostic when it comes to minerals. Ask for some detail as "frac headline", whatever in the world that is, means nothing to those of us in the industry.
As per Skip, need some more info on this issue in order to address it.
I will make a "leap" and assume the realtor is talking about a situation where the present surface owner of this tract has agreed to allow an operator to put their drilling and production pad / site on this tract and then drill a horizontal into the adjacent tract(s). Common practice to allow the operator to maximize horiztonal coverage in the target zone in their laterals.
If this is the case, good chance the operator is planning for multiple wells from these surface locations.
Take this with a grain of salt until you can find out more info about what is really going on out here.
It sounds like these are pipelines that transport water to well sites for use in facking wells. The Frac Pond mention and easement would seem to match with that assumption. If this is the case, I suggest that you ask the realtor for copies of the lease agreements and have a qualified attorney review them before you decide to purchase or negotiate a purchase price. if there are no damages to the property or limitations of use that would hinder your planned use, then it's a question of length of contract (revenue) and whether the contract carries any extension terms.
Again, you might want to post this in the Panola County Group. When you do, all the group members get an email alerting them to your new discussion.