The Mt Todd mine site is located approximately 50 km north of Katherine and 250 km south of Darwin. The site covers a mine tenement of more than 140,000 ha, which includes both the Batman and Quigleys gold deposits.
The site was acquired by Vista Gold and its wholly owned subsidiary Vista Gold Australia in 2006.
Currently not in production, Vista Gold is working with the authorities to obtain the necessary permits for the mine prior to making a final investment decision on the project.
A favourable investment decision could lead to a two-year construction phase employing approximately 450 people with an ongoing workforce of 350 during operations.
Vista Gold announced estimated mineral resources for the Mt Todd Gold Project on May 29, 2013 in the Mt Todd Gold Project Preliminary Feasibility Study (Batman Deposit and Heap Leach Pad) and on February 26, 2014 (update for the Quigleys Deposit) as follows:
Wet season release from RP3
Vista Gold has commenced releasing treated water from Mt Todd's Batman pit (RP3) in accordance with our Waste Discharge Licence (WDL178-4).
Water is released when there is sufficient flow in the Edith River and is controlled by an automated system. The volume of treated water released is directly related to the varying flow of the Edith River. During a release of water, both Vista and the regulators take samples to ensure compliance with WDL178-4.
Water collection and storage is the biggest environmental issue presently facing the Mt Todd site.
Since the mine ceased operations in 2000, mine effected water has been collecting in the Tailings Storage facility (RP7) and the Waste Rock Dump Dam (RP1). As required this water has been pumped and stored in RP3. In 2013 and again in 2014 the water stored in RP3 was successfully treated to remove over 98% of the metals and raise the pH to an acceptable level just above neutral.
Without the discharge of treated water, there has been a historical 1.5 GL net annual increase in the total volume of water found on the Mt Todd site. Regardless of when the mine goes ahead there is a need to discharge treated water from RP3 every wet season and at the appropriate time there will be a need to treat the water in RP1 and RP7 for subsequent discharge as well. A copy of the Waste Discharge Licence Report for 2014 is now available on this website, go to Environment/Waste Discharge Licence.
Details of the water releases are posted here every weekday during the wet season when the pumps are operating.