South Dakota Administrative Rules › Title 74 - Department of Environment And Natural Resources › Article 74:29 - Mined land reclamation › Chapter 74:29:01 - Permit applications - Filing and review › Section 74:29:01:01 - Definitions

Current through Register Vol. 51, page 10, July 15, 2024
Terms defined in SDCL 45-6B-3 have the same meaning when used in this
	 article. In addition, terms used in this article are defined as follows:
(1) "Abandoned well," a well whose use has
  been permanently discontinued or which is in such a state of disrepair that it
  cannot be used for its intended purpose or for observation purposes, or which
  is abandoned pursuant to SDCL 46-6-27;
(2) "Angle of repose," the maximum angle of
  slope, measured from the horizontal plane, at which loose cohesionless material
  will come to rest on a pile of similar material. The angle of repose commonly
  ranges between 33° and 37° on natural slopes and is rarely less than
  30° or more than 39°;
(3)
  "Average commodity price," a price statistically representative of the prices
  quoted on a major recognized market over a specified period of time for a given
  commodity;
(4) "Background," the
  ambient radiation condition that exists as part of the natural environment at a
  particular location;
(5)
  "Bankfull," the mean average high-water stage;
(6) "Baseline," a premining condition,
  concentration, quantity, or quality that is set as a specific value or
  guideline against which future values are compared;
(7) "Baseline well," a well from which ground
  water is analyzed to define baseline water quality in the permit area (a
  regional baseline well) or in the production area (a production area baseline
  well);
(8) "Becquerel," a unit of
  radioactivity based on disintegrations (transformations) per unit of time. One
  becquerel (Bq) equals one disintegration per second. One curie equals
  3.7x1010 disintegrations per second, which equals
  3.7x1010 becquerels. A megabecquerel (MBq) is one
  million becquerels;
(9) "Beneficial
  use," a practical use of land which has economic or social value and which
  allows other sustainable uses;
(10)
  "Best practicable technology," a technology-based process justifiable in terms
  of existing performance and achievability in relation to health and safety
  which minimizes, to the extent safe and practicable, disturbances and adverse
  impacts of the operation on human or animal life, fish, wildlife, plant life,
  and related environmental values;
(11) "Buffer," a means used to separate,
  shield, screen, or lessen the effect of the mine operation on the surrounding
  area by reducing noise or dust, improving aesthetics, and protecting the public
  health, safety, and welfare;
(12)
  "Byproduct material," surface wastes produced by or resulting from uranium in
  situ leach mining extraction and concentration processes. Underground ore
  bodies deployed by in situ leach mining do not constitute byproduct material
  within this definition;
(13)
  "Carrying capacity," the maximum animal stocking rate possible without inducing
  damage to vegetation or related resources;
(14) "Casing," a tubular structure, generally
  of metal, concrete, or thermoplastic, which is installed in a well bore to
  maintain the well opening;
(15)
  "Catastrophic collapse," the sudden and utter failure of overlying strata
  caused by removal of underlying materials;
(16) "Cementing," the process of mixing and
  placing cement grout in a hole to prevent the vertical movement of fluids in
  the hole or the annulus;
(17)
  "Class III well," under the federal Underground Injection Control (UIC) program
  promulgated under Part C of the Safe Drinking Water Act,
  42 U.S.C.
  300 et seq (2003), a well that injects fluids
  for extraction of minerals, including solution mining of minerals. The term
  includes any well used in:
(a) Mining of
  sulfur by the Frasch process;
(b)
  In situ leach mining of uranium or other metals. This category includes only in
  situ production from ore bodies that have not been conventionally mined. Wells
  used for solution mining, such as stope leaching, are classified as Class V
  wells; or
(c) In situ mining of
  salts, trona, or potash;