- Industry: 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 ...
Existing biological, physical, social, and economic conditions of an area subject to change, both directly and indirectly, as the result of a proposed human action. Also, the chapter in an environmental impact statement describing current environmental conditions.
Industry:Engineering
The reservoir capacity assigned to the sole purpose of regulating flood inflows to reduce flood damage downstream. In some instances, the top of exclusive flood control capacity is above the maximum controllable water surface elevation. See flood control capacity.
Industry:Engineering
The Nationwide Rivers Inventory is a listing of more than 3,400 free-flowing river segments in the United States that are believed to possess one or more "outstandingly remarkable" natural or cultural values judged to be of more than local or regional significance.
Industry:Engineering
Portion of spillway downstream from chute, tunnel or conduit, which generally dissipates or stills releases. Concrete portion of an outlet works downstream from a conduit, tunnel, or control structure. The structure dissipates or stills releases. See stilling basin.
Industry:Engineering
A small dam designed to retard the flow of water and sediment in a channel, used especially to control soil erosion. Small barrier constructed in a gully or other small watercourse to decrease flow velocity, minimize channel scour, and promote deposition of sediment.
Industry:Engineering
The distance along the bottom and sides of a stream, creek, or channel in contact with the water. Length of the wetted contact between a conveyed liguid and the open channel or closed conduit conveying it, measured in a plane at right angles to the direction of flow.
Industry:Engineering
Annual inspections of a dam and appurtenant facilities are conducted by the local operating office. These examinations address both O&M and dam safety issues and use an "Annual Inspection Checklist" to aid in the examination and formal documentation of the inspection.
Industry:Engineering
A permanent or temporary monument of known elevation above sea level, used for vertical control at a construction site. A point of known or assumed elevation used as a reference in determining other elevations. A permanent reference point (elevation) used in a survey.
Industry:Engineering
A rock fragment, usually rounded by weathering or abrasion, with an average dimension of 12 inches or more: will not pass a 12-inch screen. A particle of rock that will not pass a 12-inch (300-mm) square opening. A rock which is too heavy to be lifted readily by hand.
Industry:Engineering
An embankment dam construction throughout of more or less uniform earth materials, except for possible inclusion of internal drains or blanket drains. Used to differentiate it from a zoned earthfill dam. An embankment type dam constructed of only one type of material.
Industry:Engineering
