Ohio Code § 1509.18

§ 1509.18.

Any person who drills a well within the limits of a mining operation shall give consideration

for the safety of the personnel working in the mine, and, if possible, shall locate

the well so as to penetrate a pillar. If a well is to be drilled within the limits of a mining operation that may penetrate

the excavation of a mine, the hole shall be reduced approximately fifteen feet above

the roof of the mine.  If roof conditions at the mine warrant, the hole shall be reduced in the rock formation

immediately above the mine, and a string of casing placed upon the shoulder so as

to shut off all water, then drilling shall be continued to a point approximately thirty

feet below the floor of the mine and another string of casing set.  Both strings of casing shall be approximately the same diameter as the diameter

of the hole. If no water is encountered between the bottom of the drive pipe and the approximate

casing shoulder above the roof of the mine, in lieu of the casing method outlined

above, it is permissible to use the following casing method:  the hole shall be drilled

thirty feet below the floor of the mine and a string of casing shall be extended from

the surface to a point thirty feet below the floor of the mine with a packer of sufficient

size attached to the string of casing.  The packer shall be placed so that it will be below all water and will be located

in the rock formation immediately above the mine and shall prevent water or destructive

matter from entering therein.  Then the annular space above the packer between the casing and well wall shall be

filled with prepared clay a minimum distance of fifty feet. If a well is drilled within the limits of a mining operation and does not penetrate

the excavations of a mine, the hole shall be reduced thirty feet below the coal or

mineral that is being mined and a string of casing placed at this point.  The annular space behind the casing shall be filled with neat cement from the casing

seat to a point not less than fifty feet above the seam of coal or mineral that is

being mined.  The packer method, outlined in this section, is also permissible in this type of

well. It is permissible to attach a release coupling or a right and left nipple to the string

of casing that extends through the mine, but the release coupling or right and left

nipple shall be placed in such a manner that it is above the packer or at least twenty

feet above the coal or mineral that is being mined. In wells penetrating the excavation of a mine, the casing shall be enclosed, if possible,

with a column extending from the floor to the roof of the mine, built of brick or

other suitable material, subject to the approval of the chief of the division of mineral

resources management.  If the chief finds the method prescribed in this section unsafe, inadequate, or

not suitable, the chief shall require the method to be altered in such a manner that

it will be safe.