Metropolitan Coal Project Independent ... - Peabody Energy

Metropolitan Coal Independent Environmental Audit
Condition
No.
xviii
Condition Verification Compliance Comments
C
facilities area, with four different sub-catchment
types modelled and catchment areas. The mine
water make water balance has been suitably
integrated with the Metropolitan Mine Catchment
Monitoring Program and the Metropolitan Mine
Long-walls 20-22 Water Management Plan.
(b) Section 8 of the Surface Facilities Water
Management Plan provides management
measures to minimise water use, control
erosion, prevent groundwater contamination,
and comply with any surface water discharge
limits. The Surface Facilities Water Management
Plan, references water balance in two places:
Surface facilities water management schematic
and water balance analysis (including
underground water make) for average, 10th
percentile wet and 10th percentile dry rainfall
years (S4.1.1, pp11-12 and Table 2, p13). Table
2 indicates that water from underground
accounts for a little more than 50% of inflow to
the site.
Figure 7, p18 – mine water balance calculated
as difference between inflows and outflows of
water from workings. SFWMP also provides an
initial assessment of the water make in the
underground mine (estimated to be 0.07 ML/day
based on a “more realistic estimate of ROM coal
moisture content of 7%”).
Annual Reviews assess mine water make from
metered water into and out of the mine, periodic
monitoring of moisture content of ventilation air and
monitoring of ROM moisture content.
Annual Review 2010 mine water make 0.1
ML/day (S3.3.2, pp37-39)
Annual Review 2010 mine water make 0.14
ML/day (S3.3.2, pp45-46)
Annual Review 2010 Section 4.3.2, p113 and
Annual Review 2011 (Section 4.3.2, p169) state
“Daily total rainfall and rainfall intensity are
measured at the Metropolitan Coal
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