Wisconsin Code § 167.27

Capping and filling wells or similar structures
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(1) This section applies only to counties of a population of
750,000 or more.
(2) The owner of any real estate shall securely protect any
well, seepage pit, cistern, cesspool, septic tank, or other similar
structures in active use with a cover of concrete, metal or wood
covered with sheet metal, securely fastened and of sufficient
weight so it cannot be removed by small children and so as to
make it free from danger to persons going upon such real estate.
(3) Whenever any shallow dug well, seepage pit, cistern,
cesspool or septic tank is abandoned or its use discontinued, the
owner of the real estate upon which it is located shall promptly
fill the same to grade.
(4) Whenever any drilled, bored or deep dug well, except test
wells of 10 inches or less in diameter, is abandoned or its use discontinued, the owner of the real estate upon which it is located
shall promptly fill the same, either with alternate layers of sand or
clay and concrete, and seal with a concrete cover at least 5 inches
thick, or in accordance with recommendations of the department
of health services.
(5) Whenever any mine shaft, exploration shaft or test well is
abandoned or its use discontinued, the operator or contractor
shall promptly fill same to grade or enclose the same with a fence
of strong woven wire not less than 46 inches wide with one barbwire above or cap same with a reinforced concrete slab at least 6
inches thick or with a native boulder at least 3 times the diameter
of the top of the shaft or test well bore. The strands of the woven
wire shall not be smaller than No. 12 wire and the cross wires and
meshes shall not be smaller than No. 16 wire; the strands shall
not be more than 12 inches apart, and the meshes shall not exceed
8 inches square. All wires must be tightly stretched and securely
fastened to sufficient posts firmly set not more than 8 feet apart.
In case any person shall neglect to repair or rebuild such fence
which the person is so required to build and maintain, any person
may complain to the department of safety and professional services or to the local governing body, which shall give notice in
writing to the person who is required to build and maintain such
fence. The department of safety and professional services or the
local governing body shall then proceed to examine the fence, and
if it shall determine that such fence is insufficient, it shall notify
the person responsible for its erection and maintenance and direct
the person to repair or rebuild the fence within such time as it

shall deem reasonable. Any person refusing to comply with such
order shall be subject to the penalties provided.
(6) Existing abandoned mine shafts, exploration shafts or test
wells shall be securely protected by owner of the real estate upon
which it is located.
(7) Any person violating this section shall be fined not less
than $10 nor more than $200 or imprisoned not exceeding 6
months, or both.
(8) Any violation of this section coming to the attention of
the department of safety and professional services or municipal
authorities shall be reported to the attorney general or district attorney for prosecution.

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