Jeopardy opinionU.S. Fish and Wildlife Service (FWS) or National Marine Fisheries Service (NMFS) opinion that an action is likely to jeopardize the continued existence of…
Jet-flow gateA gate consisting of a wheel-mounted leaf moved vertically by a motor-driven screw hoist.
JettingA 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.
Jetting pumpA water pump that develops very high discharge pressure.
JettyPier or other structure built out into a body of water to influence the current or tide, or to protect a harbor or shoreline.
Job hazard analysis (JHA)A study of a job or activity to identify hazards or potential accidents associated with each step or task, and develop solutions that will eliminate…
JoggingThe frequent starting and stopping of an electric motor.
JointSee expansion joint, cold joint, construction joint, contraction joint, and control joint.
Joint information centerA single location where public information officials gather to collaborate on, and coordinate the release of, emergency public information.
Joint use capacityThe reservoir capacity assigned to flood control purposes during certain periods of the year and to conservation purposes during other periods of the year.
JokulhlaupAn Icelandic term meaning glacier dammed lake outburst flood.
JouleA metric unit of energy or work; the energy produced by a force of one Newton operating through a distance of one meter; 1 Joule per second equals 1 Watt…
Jurisdiction(1) The legal authority of a court to hear and decide a case. Concurrent jurisdiction exists when two courts have simultaneous responsibility for the same…
JuvenileYoung fish older than 1 year but not capable of reproduction.
Juvenile salmonAll early lifestages of downstream migrating salmon (fry through smolt).
Juvenile WaterWater formed chemically within the earth and brought to the surface in intrusive rock.