This is often a difficulty in that it is quite possible that this will be an expensive exercise. Often it will be the liability of the power company, but this is little comfort in that in this turbulent market the power company could easily go into liquidation. Sometimes the Lease will provide that a certain amount of money is put back every year to go towards this cost. An alternative is that a bond is purchased from a bank or perhaps an insurance company that will pay for its costs. It is very difficult to predict what the cost will be and a good Lease would say that this valuation issue will be revisited every two or three years.