Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 406 - MINE WASTE EFFLUENT AND WATER QUALITY STANDARDS
Subpart B - WATER QUALITY STANDARDS
Section 406.205 - Contact with Disturbed Areas
Universal Citation: 35 IL Admin Code ยง 406.205
Current through Register Vol. 48, No. 38, September 20, 2024
The Agency must consider whether the operator's practices stop or minimize water from coming into contact with disturbed areas by considering erosion controls, including:
a) Diversions
1) Bypass diversions that collect and convey
water around or through disturbed areas to receiving stream waters that would
otherwise flow over or through disturbed areas.
2) On-site diversions that convey water
around or over disturbed areas or undermined areas connected to the
surface.
3) Interception diversions
that isolate on-site critical areas, including raw spoils, partially stabilized
spoils, and highway access roads.
b) Runoff Controls
1) Clearing, grubbing, scalping, grading and
reclamation to keep stages of the mining operation concurrent with extraction
operations and to allow only a minimum disturbed surface area to be exposed at
any one time.
2) Keeping gradients
and inclines to the active pit as short as possible to minimize the amount of
drainage going to the active pit.
3) Soil stabilization measures such as
revegetation and mulching to reduce the potential for exposing materials that
may produce dissolved solids.
4)
Sealing boreholes acting as conduits allowing uncontrolled entrance of water to
underground mines or to active pit areas of surface mines.
5) Leaving sufficient barriers whenever
mining adjacent to abandoned underground workings that may be inundated with
water.
6) Prompt disposal of
potential contaminant-producing materials in areas that will prohibit or
minimize contact with surface and groundwater.
7) Covering or treating potential
contaminant-producing materials to minimize adverse effects on water
quality.
8) Sealing water-yielding
fracture zones encountered during underground mining to reduce the flow of high
total dissolved solids waters when geologic conditions permit successful
sealing and when the flow from the fracture zone contributes significantly to
the total dissolved solids load in the mine discharge.
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