An easement is extinguished when the dominant owner releases it, expressly or impliedly, to the servient owner. Such release can be made only in the circumstances and to the extent in and to which the dominant owner can alienate the dominant heritage.

An easement may be released as to part only of the servient heritage.

Explanation I.—An easement is impliedly released—

Explanation II.—Mere non-user of an easement is not an implied release within the meaning of this section. Illustration