LAC 43:XV.2735. Disposal of Excess Spoil

A. Each application shall contain descriptions, including appropriate maps and cross-sections, of the proposed disposal site and design of the spoil disposal structures according to §§5365-5371. 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 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 §5365.J, 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 §2735.B.5.