Wambo Coal AEMR 2010-2011 - Peabody Energy

2010-2011 AEMRRunoff from rehabilitated and establishingrevegetated mine areas is directed to sedimentdams. These are either allowed to drain to localdrainages or directed to mine water storages,depending upon the water quality.An extensive reticulation system has beendeveloped to: transfer water between Open Cut andUnderground operations and mine waterstorages;such as upgrades to pump-out lines from theBates Pit area and movement towards anintegrated water management system; andthe automation of major pump installationsacross the site was fine-tuned and overallmaintenance of pumping infrastructurecontinued.source water from Wollombi Brook and theHunter River;facilitate controlled releases to Wollombi Brook;and(until the end of 2009) provided water to theadjacent United Collieries operation.The available water sources and undergroundstorage capacity for mine water have providedWCPL with flexibility to manage its water system.During the reporting period the main watermanagement related activities included:reviewing the site water balance for the shortand medium term, taking into account the newMOP and water availability;dewatering of the Open Cut and controllingwater levels in the Underground workings;maintaining water supply to the Open Cut truckfill water tanks to provide water for dustsuppression;maintenance and testing of the Hunter RiverSalinity Trading Scheme (HRSTS) dischargesystem and upgrade;continued decanting of water from the HunterPit (emplacement area) and North East CutTailings to the Homestead Pit for reuse;maintenance of the fire water reticulationsystem to the Wambo Homestead complex;continued installation and refining of telemetryfor site water management and control;continued dewatering from the No. 2 and No.1boreholes;Dewatering of the Homestead Pit void;Completion of the Wollemi Brook pumpsupgrade;planning and execution of modifications towater management systems in the Open CutPage 28