In 1973 Amdel was requested by the Department of Mines and Energy to investigate the problem of water pollution in Dawesley Creek, apparently arising from the abandoned pyrites mine at Brukunga. Following the investigation of sources of pollution, a number of possible methods for abatement were tested, and in Amdel Report 1149 (1977) a series of recommendations for complete rehabilitation were made. This report describes work done during 1978-1979 in implementing some of the recommendations. Objectives The aims of this project were: 1. to continue the series of monthly samples of creek and mine seepage waters 2. to monitor the progress of earlier revegetation 3. to carry out further revegetation trials on the mullock heaps. Summary of Work Done Samples of waters from Dawesley and Days Creeks and from mine seepages were taken at monthly intervals and analysed for pH and acid-value. The results were correlated with previous data and a standard series of sampling point reference numbers was prepared to facilitate reference to earlier data. The revegetation of the tailings dam in 1978 was considered to have been unsuccessful, probably because the seed was sown onto the surface. A contractor was engaged to re-seed the tailings dam and to cover as much seed as possible using harrows. Six trial revegetation plots were set up on the bank of the southern mullock heap to assess the success of various plant species under different soil treatments. Successful trials were made of a pneumatic method of distributing lime onto the slopes of the mullock heap. Following these trials the areas sprayed with lime were sown with fertiliser and pasture seeds. Conclusions and Recommendations Sampling of surface waters in Dawesley and Days Creeks and from mine seepages, at monthly intervals, has shown that the creekflow diversion schemes of 1976 have improved the water quality in Dawesley Creek, but its condition is still not acceptable. It is recommended that the monthly sampling be continued for at least two years after the treatment plant commences operation (estimate March 1980). The progress of the tailings dam revegetation and the trials on the mullock heaps should be monitored for at least two years before any further revegetation is done. .