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Assessment of the Jabiluka Project : report of the Supervising Scientist to the World Heritage Committee



Assessment of the Jabiluka Project : report of the Supervising Scientist to the World Heritage Committee


Johnston, A.; Prendergast, J. B.; Bridgewater, Peter


E-Publications; E-Books; PublicationNT; Supervising Scientist Report; 138




Alligator Rivers Region

Table of contents

Main report--Appendix 2 of the Main Report. Submission to the Mission of the World Heritage Committee by some Australian Scientists ... --Attachment A. Johnston A. and Needham S. 1999. Protection of the environment near the Ranger uranium mine--Attachment B. Bureau of Meteorology 1999. Hydrometeorological analysis relevant to Jabiluka--Attachment C. Jones, R.N., Hennessy, K.J. and Abbs, D.J. 1999. Climate change analysis relevant to Jabiluka--Attachment D. Chiew, F and Wang, Q.J. 1999. Hydrological anaysis relevant to surface water storage at Jabiluka--Attachment E. Kalf, F. and Dudgeon, C. 1999. Analysis of long term groundwater dispersal of contaminants from proposed Jabiluka mine tailings repositories--Appendix 2 of Attachment E. Simulation of leaching on non-reactive and radionuclide contaminants from proposed Jabiluka silo banks.




Uranium mill tailings - Environmental aspects - Northern Territory - Alligator Rivers Region; Environmental impact analysis - Northern Territory - Jabiluka; Uranium mines and mining - Environmental aspects - Northern Territory - Jabiluka; Jabiluka - Environmental aspects

Publisher name

Environment Australia

Place of publication

Canberra (A.C.T.)


Supervising Scientist Report; 138


1 volume (various pagings) : illustrations, maps

File type






Copyright owner

Environment Australia



Parent handle


Citation address


Related items

https://hdl.handle.net/10070/462403; https://hdl.handle.net/10070/462400; https://hdl.handle.net/10070/462405; https://hdl.handle.net/10070/462406; https://hdl.handle.net/10070/462408; https://hdl.handle.net/10070/462409; https://hdl.handle.net/10070/462411

Page content

73 one tenth of the internationally accepted limit, has an extremely small exceedence probability. For an earthquake that occurs in the Wet season, the maximum area of the Magela floodplain in which adverse effects on some aquatic invertebrates might be expected is about 1.5 km2 but the probability of this occurring is extremely small. The area affected at the 1 in 10,000 level of probability is less than 0.5 km2 which is less than 0.3% of the floodplain area.. At the same level of probability, residual effects may occur for some species of invertebrates out to an area of about 5 km2. Even within these areas, the impact would be very small (for example, fish should not be affected) and the system would fully recover following flushing by the natural waters of the Magela system. If an earthquake occurs in the Dry season, the area of impact would be greater. Nevertheless, the probability of such effects occurring remains very low and the system would recover during the following Wet season. Contingency measures It is recommended that runoff from the ore stockpile should be isolated from runoff from the remainder of the Total Containment Zone so that it is always directed to the water retention pond while, under extreme conditions, runoff from the rest of the TCZ is diverted away from the storage pond. This measure would reduce still further the risk associated with exceeding the capacity of the storage pond. It is recommended that the water retention pond be constructed with a properly engineered spillway to ensure that, even if diversion contingency measures fail, the pond structure would not fail when the overtopping height is reached. This would reduce substantially the impact arising in the event of overtopping because only a small volume of water would be released to the environment rather than the full volume of the pond.

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