fitting a lift will depend on which type. I can only comment on floating docks / lifts. If this is the type of lift you will have you need about 4.5' of water at the opening of the slip. ( for a shallow water model lift ) you can get away with less water if you go with a bottom standing type lift. But if the water flucuates at your lake, these type of lifts can be a PITA.
Last edited by sdub; 03-17-2010 at 10:07 AM.
Reason: meant 4.5'