US PATENT SUBCLASS 405 / 111
.~.~.~.~ With ballast compartment or cavity

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

52  DF  FLUID CONTROL, TREATMENT, OR CONTAINMENT {7}
80  DF  .~ Flow control {7}
107  DF  .~.~ Artificial water barrier (e.g., dam, levee, etc.) {7}
110  DF  .~.~.~ Hollow or buttressed {2}
111.~.~.~.~ With ballast compartment or cavity

DEFINITION

Classification: 405/111

With ballast compartment or cavity:

(under subclass 110) Method or apparatus wherein the barrier includes or has attached thereto a hollow structure into which is placed water, rock, concrete, etc., to stabilize the barrier.