There is no easy answer. Easements are sometimes created by necessity--because a party needs an easement, either for its own use (e.g. a "land-locked" neighbor who  needs to pass over your land to reach his/her own), or for the public good. In addition, state or local law may give utilities the right to pass over or use your land when necessary.The best thing to do is to contact experienced real estate counsel, and have the attorney review the situation and the proposed easement with you. The laywer can let you know whether you have grounds to refuse access--or perhaps simply have leverage and an opportunity to negotiate some payment (or better payment, if you've already been offered something) for the easement. Good luck.