My question involves real estate located in the State of: CA

My neighbor is landlocked and has a prescriptive easement on my property via a driveway and a water line next to the driveway. There is (was) a row of trees (over 20ft tall) that grew near the water line. My neighbor cut all of them down while I was away.

He said they were scratching his car. The neighbor has wanted these trees removed for over 8 years. He had argued with the previous land owner (approx. 8 years ago) stating that the roots would break his waterline - however no action was taken.

What legal recourse do I have?

What is the prescriptive easement area involved for a water line (meaning how much distance from the pipe can he claim as part of the easement)?

Thanks in advance...