Diameter
Wall Thickness
Weight per lin. ft. with threads and
Couplings
4"
.237 inches
10.98
5"
.258 inches
14.80
6"
.280 inches
19.45
8"
.322 inches
29.35
10"
.365 inches
41.85
12"
.375 inches
51.15
The casing of any well constructed entirely in unconsolidated earth
formations shall extend to a depth of 150 feet below the established ground
level or through the first impervious soil formation encountered, whichever
is deeper, and at least 5 feet below pumping level (level below ground
level to which the water surface is lowered in the well during pumping.)
Where a water bearing formation is encountered during well construction
at a depth which satisfies these minimum requirements, the acceptability
of the formation for well development shall be based on the satisfactory
results of analysis of the water by a competent laboratory. Any water
bearing formation yielding water which is contaminated as evidenced by
the presence of chemicals or bacteria of sewage original, shall be regarded
as unsatisfactory for well development.
H. All wells for domestic use, hereafter constructed
in the Town of Grant shall produce a minimum initial supply of 900 gallons
of sand-free water per hour.
I. The pump and equipment shall be installed
in a manner satisfactory to the Town of Grant and shall conform to the
following:
(1) Pump and equipment shall be designed to assure a
pollution-proof installation.
(2) The pump base shall be constructed so as to permit
installation of a water-tight
mounting.
(3) A well seal shall be used. Such well seal shall
be of simple construction, easily
installed, removed and reinstalled should it become necessary to remove
the drop
pipe for repair.
(4) The top of well casing shall be a minimum of 18 inches
above the basement floor
(5) Suction lines installed through well casing, or where
otherwise installed less than
10 feet below grade, shall be provided with an outline protective casing.
Such
protective casing shall be set watertight into the well casing. The
suction line shall
be caulked into the protective casing to provide a watertight joint which
will permit
easy removal. The suction line shall slope upward toward the pump.
Where a
suction line is brought into a basement from a well located some distance
from the
basement, the pump shall be located at least 18 inches above the basement
floor.
(6) Provisions shall be made in the well seal for future
measurements of static and
pump levels.
J. After final installation of the pumping equipment,
the well shall be pumped continuously until the water is free of turbidity,
then chlorinated heavily in accordance with the following procedure:
(1) Introduce into the well one pound of high test (70%
or equivalent) calcium hyper-
chlorite (chlorinated lime) by scattering same over the surface of
the water in the
well so that the powder will sink to the bottom thereby permeating the
supply.
(2) If powder cannot be introduced directly, then mix
one pound of calcium hyper-
chlorite, high text (70% or equivalent), with five gallons of water and
pour the
mixture into the well.
(3) Allow the chemical to remain in the well for at least
twelve hours, then pump to
waste until the odor and taste of the chemical have practically disappeared.
(4) Where calcium hyperchlorite tablets meeting the above
requirements are used, they
shall remain in the well for a minimum period of 48 hours before water
is pumped
to waste as described above.
(5) Wells larger than four inches in diameter require
proportionally larger doses of the
chemical for chlorination but shall not have a concentration of applied
solution less
than 150 parts per million for twelve hours.
K. All commercial wells shall comply with the
requirements of the Minnesota State
Department of Health for public water supplies.
L. Upon completion of drilling a well, a pumping
test of sufficient duration to determine the
yield and maximum drawdown shall be conducted. Within fifteen
days after inspection of the well, the permit holder shall file an affidavit
with the Town Clerk setting forth the results of the pumping test, the
capacity of the well, the pumping level, the depth of casing from grade,
and length and size of screen if one is used. A geological log of
the formations encountered in drilling each well shall be kept by the driller.
A copy of said log, typed in 8 1/2 x 11" paper, shall be filed along
with the well affidavit and such log shall specifically state where impervious
formation is encountered. Failure to provide such a log or affidavit,
or willful failure to provide accurate information with respect thereto
shall constitute a violation of this ordinance.
M. The construction of a well for the purpose
of disposing of any liquids, including surface waters, air-conditioning,
or commercial wastes, shall be prohibited in the Town of Grant.
N. The following terms used in this ordinance
are clarified as follows:
(1) Drawdown - the change in surface elevation of a body
of water such as the result
of the withdrawal of water therefrom.
(2) Glacial Drift - An assemblage of deposits left by
the melting of an ice sheet or glacier.
It is composed of an accumulation of unstratified material of all sizes
which formed at
the margin of the ice.
(3) Grout - A thin mortar consisting of portland cement
and water or portland cement,
sand and water in the following proportions:
(a) one sack cement to 4 1/2 to 5 1/2 gallons of water.
(b) one part cement, one part clean sand and 4 1/2 to
6 gallons water. The sand
grout shall be used only where abnormal loss of grout to crevices or faults
occurs.
(4) Log - A chronological record of the soil and rock
formations encountered in the
operation of drilling a well, with either their thickness, or the elevation
of the top
and the bottom of each formation given. It also includes statements
as to the comp-
position and water-bearing characteristics of each formation.
(5) Porosity - An index of the void characteristics of
a soil as it pertains to percolation.
(6) Turbidity - A condition of a liquid to to fine visible
material in suspension, which may
not be of sufficient size to be seen as individual particles by the naked
eye but which
prevents the passage of light through the liquid.
(7) Yield - The quantity of water flow (gallons
per minute or per hour) which can be
collected pumped) from the well.
Section 2:
This ordinance shall only apply to the construction of a new well or any
major reconstruction for which the owner or his agent must first obtain
a permit under Section 1, subdivision A herein.
Section 3:
This ordinance and each of the separate provisions thereof have been enacted
for the benefit and protection of property owners as well as the public.
Each and ever contract for the performance of work of a type regulated
by this ordinance shall be implication include a covenant on the part of
the one who is to perform the work that, except to the extent that compliance
with this ordinance has been modified or waived, the work shall be performed
strictly in accordance with the applicable provisions of this ordinance.
Section 4:
Penalties
Any person, firm or corporation violating any of the provisions of
this ordinance shall be guilty of a misdemeanor, and upon conviction thereof
shall be fined in an amount not to exceed $100.00 or imprisoned for not
to exceed 90 days. Each day that any violation is continued shall
constitute a separate offense.
Passed by the Town Board of Supervisors of the Town of Grant, this 14th day of May, 1968.
/a/ Harry F. Crowe
Chairman
Attest:
/a/ Arthur B. Schaefer, Jr.
Clerk
(seal)
level and the seal shall be so constructed and installed as to maintain
its water-tight
feature, should flooding occur. The pump room floor shall be at least
6 inches
above the surrounding grade and the concrete platform shall be minimum
4 inches
above grade at the edge.