Indiana Administrative Code
Title 312 - NATURAL RESOURCES COMMISSION
Article 25 - COAL MINING AND RECLAMATION OPERATIONS
Rule 6 - Performance Standards
Section 6-38 - Coal processing waste; refuse piles; water control measures
Universal Citation: 312 IN Admin Code 6-38
Current through March 20, 2024
Authority: IC 14-34-2-1
Affected: IC 14-34
Sec. 38.
Refuse piles shall meet the requirements of section 36 of this rule, 30 CFR 77.214, 30 CFR 77.215, and the following:
(1) Drainage control shall be provided as follows:
(A) If the disposal
area contains springs, natural or manmade water courses, or wet weather seeps,
the design shall include diversions and underdrains as necessary to control
erosion, prevent water infiltration into the disposal facility, and ensure
stability.
(B) Uncontrolled surface
drainage may not be diverted over the outslope of the refuse piles. Run-off
from the areas above the refuse pile and run-off from the surface of the refuse
pile shall be diverted into stabilized diversion channels designed to meet the
requirements of section 14 of this rule to safely pass the run-off from a one
hundred (100) year, six (6) hour precipitation event. Run-off diverted from
undisturbed areas need not be commingled with run-off from the surface of the
refuse pile.
(C) Underdrains shall
comply with the requirements of section 39 of this rule.
(2) Slope protection shall be provided to minimize surface erosion at the site. All disturbed areas, including diversion channels that are not riprapped or otherwise protected, shall be revegetated upon completion of construction.
(3) The following are placement requirements:
(A) All vegetative and organic materials
shall be removed from the disposal area prior to placement of coal mine waste.
Topsoil shall be removed, segregated and stored, or redistributed in accordance
with section 11 of this rule. If approved by the director, organic material may
be used as mulch, or may be included in the topsoil to control erosion, promote
growth of vegetation, or increase the moisture retention of the soil.
(B) The final configuration of the refuse
pile shall be suitable for the approved postmining land use. Terraces may be
constructed on the outslope of the refuse pile if required for stability,
control of erosion, conservation of soil moisture, or facilitation of the
approved postmining land use. The grade of the outslope between terrace benches
shall not be steeper than 2h:1v (fifty percent (50%)).
(C) No permanent impoundments shall be
allowed on the completed refuse pile. Small depressions may be allowed by the
director if they are not incompatible with the stability of the refuse pile and
if they are needed to:
(i) retain moisture;
(ii) minimize erosion;
(iii) create and enhance wildlife habitat;
or
(iv) assist
revegetation.
(D)
Following final grading of the refuse pile, the coal mine waste shall be
covered with a minimum of four (4) feet of the best available, nontoxic and
noncombustible earthen material, in a manner that does not impede drainage from
the underdrains. The director may allow less than four (4) feet of cover
material based on physical and chemical analyses which show that the
requirements of sections 54 through 61 of this rule will be met.
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