- 産業: Government
- Number of terms: 15655
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- Company Profile:
A U.S. Department of the Interior agency that oversees water resource management incuding the oversight and operation of numerous diversion, delivery, and storage projects the agency has built throughout the western United States for irrigation, water supply, and attendant hydroelectric power ...
The process of sending electricity from one utility to another wholesale purchaser over the transmission lines of an intermediate utility. Under the Energy Policy Act of 1992, utilities are required to provide wholesale transmission wheeling services to any electric utility, federal power marketing agency, or other company generating electric energy for sale in the wholesale market.
Industry:Engineering
An imaginary horizontal reference line located at midheight, or halfway point, of a circular conduit, pipe, tunnel, or the point at which the side walls are vertical on a horseshoe-shaped conduit. Also the maximum horizontal dimension or diameter of a circular conduit, pipe, or tunnel. The meeting of the roof arch and the sides of a tunnel. The guideline for laying a course of bricks.
Industry:Engineering
A fluid mixture of cement and water or sand, cement, and water used to seal joints and cracks in a rock foundation. A fluid material that is injected into soil, rock, concrete, or other construction material to seal openings and to lower the permeability and/or provide additional structural strength. There are four major types of grouting materials: chemical, cement, clay, and bitumen.
Industry:Engineering
An entity that has a contract with the Bureau of Reclamation for the delivery of irrigation water. Such entities include, but are not limited to: canal companies, conservancy districts, ditch companies, irrigation and drainage districts, irrigation companies, irrigation districts, reclamation districts, service districts, storage districts, water districts, and water users associations.
Industry:Engineering
Distinguished from rapid flow by a dimensionless number called the Froude number. If the Froude number is less than one, the flow is tranquil. If the Froude number is greater than one, the flow is rapid. If the Froude number is equal to one, the flow is critical. In tranquil flow, surface waves propagate upstream as well as downstream. Control of tranquil flow depth is always downstream.
Industry:Engineering
Enables all participants in the wholesale market equal access to transmission service, as long as capacity is available, with the objective of creating a more competitive wholesale power market. The Energy Policy Act of 1992 gave the Federal Energy Regulatory Commission (FERC) authority to order utilities to provide transmission access to third parties in the wholesale electricity market.
Industry:Engineering
As opposed to dewatering, unwatering is the interception and removal of ground water outside of excavations and the removal of ponded or flowing surface water from within excavations. To remove or drain off water. The removal and control of ponded or flowing surface water, surface seepage, and precipitation from within and adjacent to excavations by the use of channels, ditches, and sumps.
Industry:Engineering
A device used to control the flow in a conduit, pipe, or tunnel that permanently obstructs a portion of the waterway. As distinguished from gates, valves are constructed so that the closing member remains in the water passageway for all operating positions. See butterfly valve, fixed cone valve (Howell Bunger valve), Ensign valve, gate valve, hollow-jet valve, needle valve, and tube valve.
Industry:Engineering
Control joints are joints placed in concrete to provide for control of initial shrinkage stresses and cracks of monolithic units. Control joints are similar to contraction joints except that reinforcement is always continuous across the joint. Control joints are unbonded joints to provide weak areas for cracking. Control joints will transfer moment, but will not transfer shear unless keyed.
Industry:Engineering
Wear or dissolving away through chemical action as by rusting, or acids. The gradual decomposition or destruction of a material by chemical action, often due to an electrochemical reaction. Corrosion may be caused by stray current electrolysis, galvanic corrosion caused by dissimilar metals, or differential concentration cells. Corrosion starts at the surface of a material and moves inward.
Industry:Engineering
