Figure 6.4
Aquatic and terrestrial GDEs near Sandstone Gully TSF
Although no bores or aquatic GDEs are within 1 km of the proposed TSF, low and moderate potential terrestrial GDEs are intersected by this radius. The affected GDEs are upslope of the seepage flow direction, so significant impacts are not expected. Moderate potential for aquatic GDEs were found south of the TSF, and high potential terrestrial GDEs were found north of the TSF, within a 10 km radius. Water supply bores were found east of the TSF, all located more than 1 km away. It is also observed that the affected bores are primarily used for purposes other than water supply, so a significant impact on them is not expected considering the groundwater flow direction.
6.4.4 Consequence Classification Table 6.12 presents the consequence category assessment for Sandstone Gully according to DESI. Table 6.12
Consequence Category assessment for Sandstone Gully TSF– DESI (Failure to Contain – Seepage)
Item
Response
Low No loss of life is expected. The contamination of water supply bores is expected to affect the health of fewer than 10 people
Harm to humans
Project No PS213278 Sandstone Gully TSF Dam Break and Consequence Category Assessments Mount Morgan Gold Mine Heritage Minerals
WSP January 2025 Page 35
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