Abutment — In coal mining, 1 the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and 2 the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face. Acid deposition or acid rain — Refers loosely to a mixture of wet and dry "deposition" deposited material from the atmosphere containing higher than "normal" amount of nitric and sulfuric acids. The precursors or chemical forerunners of acid rain formation result from both natural sources, such as volcanoes and decaying vegetation, and man-made sources, primarily emissions of sulfur and nitrogen oxides resulting from fossil fuel combustion. Acid mine water — Mine water that contains free sulfuric acid, mainly due to the weathering of iron pyrites. Active workings — Any place in a mine where miners are normally required to work or travel and which are ventilated and inspected regularly. Adit — A nearly horizontal passage from the surface by which a mine is entered and dewatered.
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Your sink is perhaps the most well-used tool in the kitchen. You need it to help prepare meals, and to keep everything in the room clean. However, food scraps and congealed grease can stop up the drain over time, and when this happens you need to know how to unclog it. Follow the advice below for several simple, but highly effective methods to fix this problem.
Each parcel of land has a history as old as the earth and sky. It is common for properties to have had many owners through the years. Among the land use changes that may have occurred is the construction of one or more water wells.