Idaho Administrative Code › Title IDAPA 37 - Water Resources, Department of › Rule 37.03.05 - MINE TAILINGS IMPOUNDMENT STRUCTURES RULES › Section 37.03.05.035 - PLANS, DRAWINGS, AND SPECIFICATIONS

Current through August 31, 2023
The following provisions shall apply in submitting plans,
				drawings, and specifications. (3-30-23)
01.
Submission of Plans, Drawings, and
			 Specification
. Any owner who shall desire to construct, or enlarge, or
			 alter or repair any mine tailings impoundment structure shall submit duplicate
			 copies of plans, drawings, and specifications prepared by an engineer for the
			 proposed work to the Director with required fees. An owner who desires to
			 construct a continuously raised tailings impoundment structure shall submit
			 duplicate copies of plans, drawings, and specifications prepared by an
			 engineer, showing the stages of lift height, by periods of time, and ultimate
			 design height. (3-30-23)
02.
Application for and Receipt of Written Approval
. Construction of a new
			 mine tailings impoundment structure or enlargement, or non-emergency alteration
			 or repairs on existing mine tailings impoundment structures shall not be
			 commenced until the owner has applied and obtained written approval of the
			 plans, drawings, and specifications covering the work. In emergency situations,
			 the owner shall make the required alterations or repairs necessary to relieve
			 the emergency, and notify the Director. (3-30-23)
03.
Preparation and Submission of
			 Plans
. Plans must be prepared on a good grade of tracing linen or a good
			 quality vellum or mylar. Transparent copies reproducible by standard
			 duplicating processes, if accurate, legible and permanent, will be accepted.
			 Plans may initially be submitted in the form of nonreproducible paper prints.
			 After reviewing the plans, the Director will notify the owner of any required
			 changes. (3-30-23)
04.
Scale
			 of Plans and Drawings
. Plans and drawings shall be of sufficiently large
			 scale with an adequate number of views and proper dimensions, so that drawings
			 may be readily interpreted and studied. (3-30-23)
05.
Dimensions of Plans
. All
			 sheets for a set of plans shall have an outside dimension of twenty-four by
			 thirty-six (24 x 36) inches. A margin of two (2) inches on the left-hand end
			 and a margin of one-half (1/2) inch on the other three sides must be provided,
			 making the available work space twenty-three (23) x thirty-three and one-half
			 (33 1/2) inches. (3-30-23)
06.
Plans
. The plans shall include the following: (3-30-23)
a. A topographic map of the mine tailings
			 impoundment structure site showing the location of the proposed mine tailings
			 impoundment structure by section, township and range, and location of spillway
			 or diversion structures, outlet works, and all borings, test pits, borrow pits;
			 (3-30-23)
b. A profile along the
			 mine tailings impoundment structure axis showing the locations, elevations, and
			 depths of borings or test pits, including logs of bore hole and/or test pits;
			 (3-30-23)
c. A maximum
			 cross-section of the mine tailings impoundment structure showing elevation and
			 width of crest, slopes of upstream and downstream faces, thickness of any
			 proposed riprap, zoning of the earth embankment (if any), location of cutoff
			 and bonding trenches, elevations, size and type of decant systems, valves,
			 operating mechanism, and dimensions of all other essential structural elements
			 such as cutoff walls, filters, embankment zones, etc.; (3-30-23)
d. Detailed drawings describing the outlet
			 system, i.e., decant line, barge pump system, siphon system;
			 (3-30-23)
e. If a spillway is used,
			 a curve showing the discharge capacity in cubic feet per second of the spillway
			 vs. gage height of the storage pool level above the spillway crest up to the
			 maximum high-water level, and the formula used in making such determinations;
			 (3-30-23)
f. If a stream diversion
			 is created, a tabulation of the discharge capacity in cubic feet per second of
			 any diversion works and of the diversion channel vs. flow depth through the
			 diversion works or channel up to maximum capacity of the system, and the
			 formulas used in making such determinations; (3-30-23)
g. Where staged construction will take place
			 and no spillway exists, a curve showing maximum safe operating level for the
			 tailings as a function of embankment height and the design criteria used to
			 arrive at this; (3-30-23)
h.
			 Detailed plans, including cross-sections and profile, of the spillway or
			 diversion works and any associated channels; (3-30-23)
i. Plans for monitoring and/or recovering
			 seepage from the reservoir in those instances where safety of the impoundment
			 may be affected; (3-30-23)
j. An
			 operation plan; (3-30-23)
k. An
			 emergency procedure plan for protection of life and property;
			 (3-30-23)
l. An abandonment plan
			 that assures the Director to his satisfaction that, upon completion of the
			 mining operation, the site will be in a safe maintenance-free condition.
			 (3-30-23)