The fact that the power company has actually asked your permission to use the road is a hint that they may not have all of the rights they claim.

Your attorney can determine this and advise a course of action.

If it turns out that they do not have a clear right to use your road for any purpose they wish, you may be able to negotiate (for a payment to you) a "temporary easement" for construction purposes, clearly defining their rights and yours for the life of the easement, which would be the estimated time of construction, determined in advance.

You should not negotiate directly with the power company, but only through your attorney, who will probably be better able to play the poker game than you. Any payment would fall somewhere between a dollar and the cost of running a construction road through a wetland.

Good Luck!