25 Pa. Code § 87.79 - Disposal of excess spoil
(a) Each
application shall contain a description, including appropriate maps and cross
sections, of the proposed disposal site and design of the spoil disposal
structures according to §
87.131 (relating to disposal of
excess spoil). The description shall include the geotechnical investigation,
design, construction, operation, maintenance and removal, if appropriate, of
the site and structures.
(b) The
geotechnical investigation of the proposed disposal site shall include the
following:
(1) The character of bedrock and
any adverse geologic condition in the disposal area.
(2) A survey identifying all springs, seepage
and groundwater 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 facilities underlain by a rock drainage blanket.
(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 rock-toe buttresses or key-way cuts
are required according to §
87.131(k), the
description shall include the following:
(1)
The number, location and depth of or test pits with respect to the size of the
spoil disposal structures and subsurface conditions.
(2) Design parameters utilized to design the
rock-toe buttress or key-way cuts.
Notes
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