25 Pa. Code § 88.110 - Disposal of excess spoil: general requirements
(a) Spoil not required to backfill and
reclaim within the area where overburden has been removed shall be hauled or
conveyed to and placed in designated disposal areas approved by the Department.
The spoil shall be placed in a controlled manner to ensure:
(1) That the land mass designated as the
disposal area is suitable for reclamation and revegetation compatible with the
natural surroundings.
(2) Stability
of the disposal area.
(3) That
leachate and surface runoff from the disposal area will not degrade surface
waters or groundwaters or exceed the established effluent
limitations.
(b) The
disposal area shall be designed using recognized professional standards and
approved by the Department. The design shall be certified by a registered
professional engineer.
(c) All
vegetative and organic materials shall be removed from the disposal area
concurrent with the placement of spoil.
(d) Slope protection shall be provided to
minimize surface erosion at the site. All disturbed areas, including diversion
ditches that are not riprapped, shall be vegetated upon completion of
construction.
(e) The spoil to be
placed in fill shall be hauled or conveyed and placed in a controlled manner
and concurrently compacted as necessary to ensure mass stability and prevent
mass movement, covered and graded to allow surface and subsurface drainage to
be compatible with the natural surroundings and ensure a long-term static
safety factor of 1.5.
(f) The final
configuration of the disposal must be suitable for the proposed postmining land
uses.
(g) Terraces may be utilized
to control erosion and enhance stability if approved by the
Department.
(h) If the disposal
area contains springs, natural or manmade water courses, or wet-weather seeps,
an underdrain system consisting of durable rock shall be constructed from the
wet areas in a manner that prevents infiltration of the water into the spoil
material. The underdrain system shall be protected by an adequate filter and
ensure continued free drainage.
(i)
Excess spoil may be returned to underground mine workings, but only in
accordance with a disposal program approved by the Department and
MSHA.
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