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The system consists of an old kitchen sink mounted on top of a 24" culvert standing vertical in about 3 1/2 meters of ground, down below frost level. The culvert is insulated with Styrofoam to keep the water reservoir in the bottom from freezing. The water comes from a dugout located about 7 meters away. The reservoir is kept full by a horizontal pipe buried below the frost line from the dug-out to the culvert.
For the cows to drink they push their nose on the door above the sink which in turn moves a switch that turns on a small pump located in the bottom of the culvert. The water is then pumped up to the drain in the sink where the cowthen drinks to her hearts content. When she is finished drinking she backs away from the sink, the door falls closed, moving the switch which shuts off the pump. When the pumps shuts off, the water then drains from the sink back below the frost line in the same pipe it came up.
With a system such as this we are able to completely fence our dug-outs to keeps the cows out which allows for a healthy riparian area for the wild animals and birds. A healthy riparian area keeps the water quality much better.