Tag:man_made=slurry_basin
 man_made = slurry_basin
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A slurry basin 
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| Group: man made |
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| Status: in use |
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A slurry basin, also known as slurry lagoon or slurry pit, is used to store slurry until it is used as fertilizer. Most often these basins are found around farms, containing slurry from pigs or cows. But they are also used to store sludge of wastewater plants, or for fermentation residues of biogas plants.
How to map
Place 
a node at the middle or draw 
an area along its outline. Add man_made=slurry_basin
Difference to slurry_tank or storage_tank
A building=slurry_tank has a flat surface at the bottom. The walls are build in a 90 degree angle up from it. They are often made of concrete, bricks or metal sheets.
A man_made=slurry_basin has no walls that go straight up. Instead, they got a incline of around 45 degree, sometimes steeper or more flat. That´s because they commonly just dig a hole, and cover it with plastic-film or concrete.
Some of the concrete ones also got a ramp, so the farmer can drive in with a wheel loader when it´s empty to clean it from settlements at the bottom.
The most common shape is a rectangle, but there are also some round ones.