The Pennsylvania Supreme Court held that when an easement has been ambiguously granted, the grantee has a right to make any reasonable and necessary use of the land and is not limited by the grantee's subsequent agreement, use, or acquiescence of the land.
Zettlemoyer v. Transcontinental Gas Pipeline Corp., 657 A.2d 920 (Pa. 1995).
Melissa J. Ferragonio,
Eminent Domain - De Facto Taking - Easements,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol34/iss3/11