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iving one or more good seasoned wooden plugs, or a lead plug, as the case may require, so that no gas or oil may escape, or any water or destructive matter force itself into the oil or gas sand, or rock formation. Upon such seasoned wooden plug or plugging material shall be filled at least thirty feet of cement properly mixed with sand, or thirty feet of good clay or rock sediment properly prepared. If any well has passed through a workable vein or seam of coal, it shall when it is abandoned be plugged in the following manner: A seasoned wooden plug shall be driven to a point thirty feet below the lowest workable seam of coal and the hole filled with cement to a point at least twenty feet above this seam of coal, at which point another wooden plug shall be placed and the hole filled for a distance of twenty feet with cement or properly prepared clay, or rock sediment. If there is more than one seam of coal the next seam above must be plugged off in like manner. =When well penetrates the excavations of any mine.= In the event that a well being drilled penetrates the excavations of any mine, it must be cased with casing of approximately the same diameter as the diameter of the hole, the hole to be drilled thirty feet or to solid slate or rock and not less than ten feet below the floor of such mine, and the casing shall be placed in the following manner: One string of casing shall be placed at a point above the roof of said mine so as to shut off all of the surface water; then the hole drilled through said mine and another string of casing put in. The bottom of the second string of casing, or the one passing through said mine, shall not be nearer than ten feet, or more than thirty feet from the floor of the mine where it passes through the same. When any well which has been drilled is to be abandoned and has passed through the excavations of any coal mine from which the minable coal has not all been removed, the person, firm or corporation owning said well shall leave in said well the casing passing through said mine from a point not less than ten feet, nor more than thirty feet below the floor of said mine, and extending above the roof of said mine at least five feet. A seasoned wooden plug shall be driven to a point at least forty feet below the floor of the mine and the hole above said plug together with the casing left in, which extends through the coal, shall be filled with cement; then a seasoned wooden p
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