B. Each such 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 Subsection I of 19.8.20.2034 NMAC, 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 Paragraph (5) of Subsection B of 19.8.9.914 NMAC.

[11-29-97; 19.8.9.914 NMAC - Rn, 19 NMAC 8.2.9.914, 9-29-2000]