Wambo Coal AEMR 2011-2012 - Peabody Energy

2011-2012 AEMR
Runoff from rehabilitated and establishing
revegetated mine areas is directed to sediment
dams. These are either allowed to drain to local
drainages or directed to mine water storages,
depending upon the water quality.
An extensive reticulation system has been
developed to:
transfer water between Open Cut and
Underground operations and mine water
storages;
source water from Wollombi Brook and the
Hunter River;
facilitate controlled releases to Wollombi Brook;
and
(until the end of 2009) provided water to the
adjacent United Collieries operation.
such as upgrades to pump-out lines from the
Bates Pit area and movement towards an
integrated water management system; and
automation of major pump installations across
the site was maintained and refined;
Maintenance of pumping infrastructure
continued.
The available water sources and underground
storage capacity for mine water have provided
WCPL with flexibility to manage its water system.
During the reporting period the main water
management related activities included:
reviewing the site water balance for the short
and medium term, taking into account the new
MOP and water availability;
dewatering of the Open Cut from Bates South
and Montrose pits;
Controlling water levels in the Underground
workings;
maintaining water supply to the Open Cut truck
fill water tanks to provide water for dust
suppression;
maintenance and testing of the Hunter River
Salinity Trading Scheme (HRSTS) discharge
system;
continued decanting of water from the Hunter
Pit (emplacement area) Tailings to the
Homestead Pit for reuse;
maintenance of the fire water reticulation
system to the Wambo Homestead complex;
continued installation and refining of telemetry
for site water management and control;
continued dewatering from the No.2 and No.1
boreholes and installed bores 1A, 1B, 1C, 1D
and 4C;
Dewatering of the Homestead Pit void;
planning and execution of modifications to
water management systems in the Open Cut
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