Administrative Code

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Virginia Administrative Code
Title 4. Conservation And Natural Resources
Agency 25. Department of Energy
Chapter 130. Coal Surface Mining Reclamation Regulations

4VAC25-130-780.35. 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 4VAC25-130-816.71 through 4VAC25-130-816.75. These plans shall describe the geotechnical investigation, design, construction, operation, maintenance and removal, if appropriate, of the site and structures.

(b) Except for the disposal of excess spoil on preexisting benches, 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 4VAC25-130-816.71(d), rocktoe 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 rocktoe buttress or key-way cuts which shall be determined in accordance with paragraph (b)(5) of this section.

Statutory Authority

§§ 45.1-161.3 and 45.1-230 of the Code of Virginia.

Historical Notes

Derived from VR480-03-19 § 780.35, eff. December 15, 1981; amended, eff. June 28, 1982; October 28, 1982; December 14, 1982; October 11, 1983; December 27, 1983; May 8, 1984; June 22, 1984; August 2, 1984; October 16, 1985; January 7, 1987; July 22, 1987; November 25, 1987; October 12, 1988; December 26, 1990; July 1, 1991; July 17, 1991; November 20, 1991; July 7, 1992; May 5, 1993; October 19, 1994; Virginia Register Volume 15, Issue 6, eff. January 6, 1999.

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