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Alpha Natural Resources, Inc. Message Board

deepdrillers 1 post  |  Last Activity: Jan 30, 2014 2:09 PM Member since: Oct 2, 2003
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  • deepdrillers by deepdrillers Jan 30, 2014 2:09 PM Flag

    They may just have to come crawling back to coal after they run all of there water downstream
    Hydroelectric power is a major source of California's electricity. hydroelectric power plants produced 43,625 gigawatt-hours of electricity, Hydro facilities are broken down into two categories larger than 30 megawatts capacity are called "large" hydro. Smaller than 30 MW capacity is considered "small" hydro and are totalled into the renewable energy portfolio standards. The amount of hydroelectricity produced varies each year. It is largely dependent on rainfall.

    California has nearly 400 hydro plants, which are mostly located in the eastern mountain ranges and have a total dependable capacity of about 14,000 MW of capacity. The state also imports hydro-generated electricity from the Pacific Northwest.

    The larger hydro plants on dams in California (such as Shasta [pictured on the right in this U.S. Bureau of Reclamation photo], Folsom, Oroville, etc.) are operated by the U.S. Bureau of Reclamation and the state's Department of Water Resources. Smaller hydro plants are operated by utilities, mainly Southern California Edison, Pacific Gas and Electric Company and Sacramento Municipal Utility District.
    Two types of conventional hydroelectric facilities are dams and run-of-river. Dams raise the water level of a stream or river to an elevation necessary to create a sufficient elevation difference (water pressure, or head). Dams can be constructed of earth, concrete, steel or a combination of such materials. Dams may create secondary benefits such as flood control, recreation opportunities and water storage. Run-of-river, or water diversion, facilities typically divert water from its natural channel to run it through a turbine, and then usually return the water to the channel downstream of the turbine.

    Such conventional methods offer the potential for low-cost baseload electricity, but their output is dependent on the time of year

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