33 U.S.C. § 562 : US Code - Section 562: Channel depths and dimensions defined

Search 33 U.S.C. § 562 : US Code - Section 562: Channel depths and dimensions defined

In the preparation of projects under this and subsequent river
and harbor acts and after the project becomes operational, unless
otherwise expressed, the channel depths referred to shall be
understood to signify the depth at mean lower low water, as defined
by the Department of Commerce for nautical charts and tidal
predictions, in tidal waters tributary to the Atlantic and Gulf
coasts and at mean lower low water, as defined by the Department of
Commerce for nautical charts and tidal predictions, in tidal waters
tributary to the Pacific coast and the mean depth for a continuous
period of fifteen days of the lowest water, as defined by the
Department of Commerce for nautical charts and tidal predictions,
in the navigation season of any year in rivers and nontidal
channels, and and (!1) after the project becomes operational the
channel dimensions specified shall be understood to admit of such
increase at the entrances, bends, sidings, and turning places as
may be necessary to allow of the free movement of boats.