- Отрасли: Government
- Number of terms: 15655
- Number of blossaries: 0
- 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 ...
Power for main conveyance pumping, designated drainage pumping and other designated miscellaneous electric loads directly associated with the operation of the project. Electric service needed for non-Federal project activities such as maintenance crew quarters, ditch rider's facilities, irrigation headquarter's facilities, and similar uses is not considered critical to providing the basic service of delivering water and therefore, project-use power is not available for such uses.
Industry:Engineering
Temporary barriers, consisting of either timber, concrete or steel, anchored to the crest of a spillway as a means of increasing the reservoir storage. Flashboards can be removed, lowered, or carried away at the time of flooding either by a tripping device or by deliberate failure of the flashboards or their supports. Structural members of timber, concrete, or steel placed in channels or on the crest of a spillway to raise the reservoir water level but that may be quickly removed in the event of a flood.
Industry:Engineering
The depth of flow when the Froude number equals one. The depth of flow at which the discharge is maximum for a given specific energy, or the depth at which a given discharge occurs with minimum specific energy.
Industry:Engineering
Facilities for generating electricity that are not owned exclusively by an electric utility and which operate connected to an electric utility system. A term coined to describe Qualifying Facilities, independent power producers, exempt wholesale generators, and any other company in the power generation business which has been exempted from traditional utility regulation. Some NUG facilities are built by users primarily for their own energy needs. Other NUG plants are built specifically to sell power to utilities under long-term contracts. In the last five years, more than 50 percent of new generation capacity has been constructed by non-utility generators.
Industry:Engineering
Refers to the probability that a flood will occur in a given year. A 100-year flood is often considered in the design of diversion dams and for diversion-during-construction requirements. Service spillways, stilling basins, and some outlet works components may also be designed to pass certain level of floods designated by a return period. The return period should be thought as the chance that such a flood will be equaled or exceeded in any one year. For example, the 100-year flood is the flow level with a 0.01 annual exceedance probability, or there is 1 chance in 100 that this flood flow level will be equaled or exceeded in any given year.
Industry:Engineering
An onsite examination performed approximately every 3 years, or more frequently if conditions dictate, to evaluate the operation, performance, and existing condition of all features.
Industry:Engineering
Waters of the United States including:
: (a) All waters that are currently used, were used in the past, or may be susceptible to use in interstate or foreign commerence, including all waters that are subject to the ebb and flow of the tide.
: (b) Interstate waters, including interstate wetlands.
: (c) All other waters such as intrastate lakes, rivers, streams (including intermittent streams), mudflats, sandflats and wetlands, the use, degradation, or destruction of which would affect or could affect interstate or foreign commerce, including waters used or which could be used for industries in interstate commerce.
: (d) All impoundments of waters otherwise defined as navigable waters.
: (e) Tributaries of waters identified in (a) through (d).
: (f) Wetlands adjacent to waters identified in (a) through (d).
Industry:Engineering
Reaction of alkalis with aggregate with various forms of poorly crystalline reactive silica: opal, chert, flint and chalcedony and also tridymite, crystoblite and volcanic glasses. Aggregate containing such materials (e.g., some cherty gravels) may cause deterioration of concrete when present in amounts of 1% to 5%. Concrete made of these aggregates is characterized by the early onset of a relatively rapid expansion. Cracking of structures is often observed within 10 years of construction. See alkali-aggregate reaction.
Industry:Engineering
A network pattern of fine cracks in concrete that do not penetrate much below the surface. Crazing cracks are very fine and are barely visible, except when the concrete is drying after it has become wet.
Industry:Engineering
In power terminology, the load for which a generator, transmission line, or system is rated, expressed in kilowatts. The amount of electric power delivered or required for which a generator, turbine, transformer, transmission circuit, station, or system is rated by the manufacturer. The maximum load that a machine, station, or system can carry under existing service conditions. Equivalent terms: peak capability, peak generation, firm peak load, carrying capability. In transmission, the maximum load a transmission line is capable of carrying. See excess capacity and peaking capacity. Also refers to powerplant generation capability under specific operating conditions and the amount of marketable resource under such conditions.
Industry:Engineering
