Current through March 20, 2024
Authority: IC 14-10-2-4; IC 14-34-2-1
Affected: IC 14-34
Sec. 87.
(a) Each
application shall include a general plan and a detailed design plan for each
proposed siltation structure, water impoundment, and coal processing waste dam,
embankment, or refuse pile within the proposed permit area. The information
required shall be provided as follows:
(1)
Each general plan shall be as follows:
(A) Be
prepared by, or under the direction of, and certified by a qualified registered
professional engineer or by a professional geologist either of whom shall be
experienced in the design and construction of impoundments.
(B) Contain the following:
(i) A description, map, and cross section of
the structure and its location.
(ii) Preliminary hydrologic and geologic
information required to assess the hydrologic impact of the
structure.
(iii) A survey
describing the potential effect on the structure from subsidence of the
subsurface strata resulting from past underground mining operations if
underground mining has occurred.
(iv) A certification statement that includes
a schedule setting forth the dates when any detailed design plans for
structures that are not submitted with the general plan will be submitted to
the director. The director shall have approved, in writing, the detailed design
plan for a structure before construction of the structure begins.
(2) Each detailed
design plan for a structure shall be as follows:
(A) Be prepared by, or under the direction
of, and certified by a qualified registered professional engineer with
assistance from experts in related fields, such as the following:
(i) Geology.
(ii) Land surveying.
(iii) Landscape architecture.
(B) Include any geotechnical
investigation, design, and construction requirements for the
structure.
(C) Describe the
following:
(i) The operation and maintenance
requirements for each structure.
(ii) The timetable and plans to remove each
structure if appropriate.
(D) Identify those structures that meet or
exceed the size and other criteria of
30
CFR 77.216(a) and include a
copy of the plans for design and construction approved by the Mine Safety and
Health Administration for those identified structures.
(b) Siltation structures, whether
temporary or permanent, shall be designed in compliance with the requirements
of
312
IAC 25-6-81. Any siltation structure or earthen
structure that will remain on the proposed permit area as a permanent water
impoundment shall also be designed to comply with the requirements of
312
IAC 25-6-84.
(c) Permanent and temporary impoundments
shall be designed to comply with the requirements of the following:
(1)
312
IAC 25-6-84.
(2)
30
CFR 77.216-1.
(3)
30
CFR 77.216-2.
(d) Refuse piles shall be designed to comply
with
312
IAC 25-6-98 through
312
IAC 25-6-102.
(e) Coal processing waste dams and
embankments shall be designed to comply with the requirements of
312
IAC 25-6-98 and
312
IAC 25-6-106 through
312
IAC 25-6-108. Each plan shall also comply with the
requirements of the Mine Safety and Health Administration,
30
CFR 77.216-1 and
30
CFR 77.216-2, and shall contain the results
of a geotechnical investigation of the proposed dam or embankment foundation
area to determine the structural competence of the foundation that will support
the proposed dam or embankment structure and the impounded material. The
geotechnical investigation shall be planned and supervised by an engineer or
engineering geologist according to the following:
(1) The number, location, and depth of
borings and test pits shall be determined using current, prudent engineering
practice for the following:
(A) Size of the
dam or embankment.
(B) Quantity of
material to be impounded.
(C)
Subsurface conditions.
(2) The character of the overburden and
bedrock, the proposed abutment sites, and any adverse geotechnical conditions
that may affect the particular dam, embankment, or reservoir site shall be
considered.
(3) All springs,
seepage, and ground water flow observed or anticipated during wet periods in
the area of the proposed dam or embankment shall be identified on each
plan.
(4) Consideration shall be
given to the possibility of:
(A)
mudflows;
(B) rock-debris falls;
or
(C) other landslides; into the
dam, embankment, or impounded material.
(f) If the structure meets the Class B or C
criteria for dams in TR-60 or meets the size and other criteria of
30
CFR 77.216(a), each plan
under subsections (b), (c), and (e) shall include the following:
(1) A stability analysis of the structure
that shall include, but not be limited to, the following:
(A) Strength parameters.
(B) Pore pressures.
(C) Long term seepage conditions.
(2) A description of each
engineering design assumption and calculation with a discussion of each
alternative considered in selecting the specific design parameters and
construction methods.
(g) If the proposed siltation structure,
water impoundment, coal processing waste dam, or embankment is permanent and
the:
(1) structure is twenty (20) feet or
higher;
(2) drainage area above the
structure is one (1) square mile or larger; or
(3) volume of water impounded is more than
one hundred (100) acre-feet; an application shall be submitted to the division
of water, department of natural resources, and prior approval shall be obtained
from the director before construction of the structure begins.