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In Cumberlad County, solar power is used but it is not widespread throughout the county.

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Hydroelectricity costs much less than most alternative energy sources. States that produce most of their electricty by the use of hydroelectricity have energy bills that are much lower than the rest of the country.

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There are methods that help fish move around the dam and between sections of the river. Fish ladders and fish elevators are just two techniques that help the fish.

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Hydroelectricity is one of the oldest froms of alternative energy. It was used by farmers to grind grain. These farmers date back to as far as ancient Greece.

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Hydroelectricity depends on the amount of precipitation and water that is being used in the dam or reservoir. Because of its dependence on water which is not always predictable, electricity consumed that was produced by hydroelectricity will always vary.

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Impoundment facilities - use a    dam to create a reservoir of water.

Pumped storage facilities - use a dam with a lower and upper reservoir, using the lower reservoir to store water and energy for later use.

Run-of-river facilities - uses natural water flow rates to divert  a portion of river water through turbines, sometimes without the use of a dam or reservoir.