Our HOA dredged a 2-3' deep 0.25-acre pond to 6-8' last year; however, the pond is not holding water sufficiently (pic attached) as of late July (had a really wet spring here in Michigan).

What is the best option between bentonite, liner or a well (and pump)? I've heard mixed reviews for each, but need to do something as neighbors are complaining. If we go the bentonite or liner path, I will also need to find a vendor that services SE Michigan.

Thanks for any guidance!
Attachments
IMG_20190804_194457-min v2.jpg