NPDP Dam Dictionary

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Term AKA Definition
Jet-flow gate A gate consisting of a wheel-mounted leaf moved vertically by a motor-driven screw hoist.
Jetting A method of compacting soil using a hose or other device, with a high velocity stream of water, worked down through the depth of soil placed.
Jetty Pier or other structure built out into a body of water to influence the current or tide, or to protect a harbor or shoreline.
Joint See expansion joint, cold joint, construction joint, contraction joint, and control joint.
Joint use capacity The reservoir capacity assigned to flood control purposes during certain periods of the year and to conservation purposes during other periods of the year.
Juvenile salmon All early lifestages of downstream migrating salmon (fry through smolt).