Current through March 20, 2024
Authority: IC 14-34-2-1
Affected: IC 14-34
Sec. 49.
(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 do the following:
(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 a description, map, and cross
section of the structure and its location.
(C) Contain preliminary hydrologic and
geologic information required to assess the hydrologic impact of the
structure.
(D) Contain 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.
(E) Contain 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 do the following:
(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
geology, land surveying, and landscape architecture.
(B) Include any geotechnical investigation,
design, and construction requirements for the structure.
(C) Describe the operation and maintenance
requirements for each structure.
(D) Describe the timetable and plans to
remove each structure, if appropriate.
(E) 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 that has been 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 25-6-17. 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 25-6-20.
(c) Permanent and temporary impoundments
shall be designed to comply with the requirements of
312
IAC 25-6-20 and the requirements of the Mine Safety
and Health Administration at
30
CFR 77.216-1 and 30 CFR 77.216-2.
(d) Refuse piles shall be designed to comply
with
312
IAC 25-6-36 through
312
IAC 25-6-39.
(e) Coal processing waste dams and
embankments shall be designed to comply with the requirements of
312 IAC
25-6-34,
312
IAC 25-6-36, and
312
IAC 25-6-43 through
312
IAC 25-6-45. 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 boring
and test pits shall be determined using current, prudent engineering practice
for the size of the dam or embankment, quantity of material to be impounded,
and 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 mudflows, rock-debris falls, or 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:
(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, in the department of natural resources, and approval shall be
obtained from the director before construction of the structure
begins.
