33 C.F.R. § 162.160
Vermilion, Lorain, Cleveland, Fairport, Ashtabula, and Conneaut Harbors, Ohio
(a) In Vermilion Harbor, no vessel may exceed 6 miles per hour.
(b) In Lorain, Cleveland, Fairport, Ashtabula, and Conneaut Harbors, no vessel may exceed 6 miles per hour, except in the outer harbors, where no vessel may exceed 10 miles per hour.
The Corps of Engineers also has regulations dealing with these areas in 33 CFR part 207.