30 CFR 817.73 - Disposal of excess spoil: Durable rock fills.

§ 817.73 Disposal of excess spoil: Durable rock fills.
The regulatory authority may approve the alternative method of disposal of excess durable rock spoil by gravity placement in single or multiple lifts, provided the following conditions are met:
(a) Except as provided in this section, the requirements of § 817.71 are met.
(b) The excess spoil consists of at least 80 percent, by volume, durable, nonacid- and nontoxic-forming rock (e.g., sandstone or limestone) that does not slake in water and will not degrade to soil material. Where used, noncemented clay shale, clay spoil, soil or other nondurable excess spoil material shall be mixed with excess durable rock spoil in a controlled manner such that no more than 20 percent of the fill volume, as determined by tests performed by a registered engineer and approved by the regulatory authority, is not durable rock.
(c) A qualified registered professional engineer certifies that the design will ensure the stability of the fill and meet all other applicable requirements.
(d) The fill is designed to attain a minimum long-term static safety factor of 1.5, and an earthquake safety factor of 1.1.
(e) The underdrain system may be constructed simultaneously with excess spoil placement by the natural segregation of dumped materials, provided the resulting underdrain system is capable of carrying anticipated seepage of water due to rainfall away from the excess spoil fill and from seeps and springs in the foundation of the disposal area and the other requirements for drainage control are met.
(f) Surface water runoff from areas adjacent to and above the fill is not allowed to flow onto the fill and is diverted into stabilized diversion channels designed to meet the requirements of § 817.43 and to safely pass the runoff from a 100-year, 6-hour precipitation event.
[48 FR 32929, July 19, 1983]

Title 30 published on 2014-07-01

no entries appear in the Federal Register after this date.

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United States Code
U.S. Code: Title 30 - MINERAL LANDS AND MINING

Title 30 published on 2014-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 30 CFR 817 after this date.

  • 2014-08-25; vol. 79 # 164 - Monday, August 25, 2014
    1. 79 FR 50565 - Petition To Initiate Rulemaking; Use of Explosives on Surface Coal Mining Operations
      GPO FDSys XML | Text
      DEPARTMENT OF THE INTERIOR, Office of Surface Mining Reclamation and Enforcement
      Notice of availability of petition to initiate rulemaking; extension of comment period.
      The comment period for the petition for rulemaking published on July 25, 2014 (79 FR 43326), is extended. We will review and consider all comments submitted to the addresses listed below (see ADDRESSES ) on or before September 25, 2014.
      30 CFR Parts 816 and 817