I have been spending quite a bit of time on gas line and well pad right-of-ways in Pennsylvania and Ohio. That entails alot of hiking and inventory work, but I like doing it because it insures that folks are getting properly compensated for their trees. If you own land and gas or oil development is happening on it BE SURE to get a tree appraisal! You are losing forest, it can never be replanted, so you should be fairly treated.
The development companies will offer you a "per lineal foot" offer to make an adjustment for your timber, but I have seen many cases where it wasn't enough. How do you know?
And...the development company WILL PAY FOR THE INVENTORY AND APPRAISAL.
It cost you nothing to be sure....why wouldn't you want to be ??