B2.1 Design depths for a specific marina must be based on a design low water
elevation established on the basis of a low water datum for the area or reliable longterm
extreme low water data obtained from federal, state and local water
authorities. Such information should include low tide levels, lowest recorded water
depths, etc., in salt water or fresh water locations as required.
B2.2 Required minimum depths below design low water must be objectively
determined on the basis of the type (power or sail), length and draft of the boats
expected to be berthed in a marina, or specific sections within a larger marina.
The table below provides minimum water depths below design low
water, but does not address additional depths that may be necessary
for silt deposition storage between periodic dredging operations.