Section 12.153 - 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 §§ RSA 12.363-RSA 12.366 of this title (relating to Disposal of Excess Spoil: General Requirements, to Disposal of Excess Spoil: Valley Fills, to Disposal of Excess Spoil: Head-of-Hollow Fills, and to Disposal of Excess Spoil: Durable Rock Fills). 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 § RSA 12.363 of this title (relating to Disposal of Excess Spoil: General Requirements), rock-toe buttresses or keyway 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 keyway cuts which shall be determined in accordance with subsection (b)(5) of this section.16 Tex. Admin. Code § 12.153
The provisions of this §12.153 adopted to be effective April 7, 1997, 22 TexReg 3093.