I am sorry for this delayed reply to your gardening question. We are transitioning to a new Q&A system and your question was unfortunately lost in the transition. I have discovered it now and hope this reply is not too late to be of help.
A French drain would be an effective option if installed properly. It has to slope downward very gradually and there must be some lower area for it to drain into. I suggest you consult some landscape companies in the area to see who does that type of work.
Thanks for the question. Please stop in again soon!
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