SECTION 460:20-27-19. Disposal of excess spoil

(a)   Each application shall contain descriptions, including appropriate maps and cross-section drawings, of the proposed disposal site and design of the spoil-disposal structures according to Sections 460:20-43-24 through 460:20-43-27 of this Chapter. These plans shall describe the geotechnical investigation, design, construction, operation, maintenance, and removal, if appropriate, of the site and structures.

(b)   Each application shall contain the results of a geotechnical investigation of the proposed disposal site, including the following:

(1)   The character of bedrock and any adverse geologic conditions in the disposal area,

(2)   A survey identifying all springs, seepage, and ground- water flow observed or anticipated during wet periods in the area of the disposal site;

(3)   A survey of the potential effects of subsidence of the subsurface strata due to past and future mining operations;

(4)   A technical description of the rock materials to be utilized in the construction of those disposal structures containing rock chimney cores or underlain by a rock drainage blanket; and

(5)   A stability analysis including, but not limited to, strength parameters, pore pressures and long-term seepage conditions. These data shall be accompanied by a description of all engineering design assumptions and calculations and the alternatives considered in selecting the specific design specifications and methods.

(c)   If, under Section 460:20-43-24(d) of this Chapter, rock-toe buttresses or key-way cuts are required, the application shall include the following:

(1)   The number, location, and depth of borings or test pits which shall be determined with respect to the size of the spoil disposal structure and subsurface conditions; and

(2)   Engineering specifications utilized to design the rock- toe buttress or key-way cuts which shall be determined in accordance with (b) (5) of this Section.