Figure6.3
Aquatic and terrestrial GDEs near Upper Mundic Gully TSF
6.4.4 Consequence Category classification
Table 6.12 presents the
Consequence Category assessment according to DETSI for both
proposed embankment stages of Upper Mundic Gully TSF according to DETSI.
Table6.12
Consequence Category Assessment for Upper Mundic Gully TSF DETSI (failure to contain seepage)
Item
Stage 1
Stage 2
Harm to humans
Low No loss of life is expected. The contamination of water supply bores is expected to affect the health of fewer than 10 people
Same as Stage 1.
General environmental harm Significant
Same as Stage 1.
Based on the conceptualisation within the seepage management plan (WSP, 2026), a potential seepage pathway to the north-west of the TSF has been identified. This intersects the area identified as having low to moderate potential for GDEs, with the impacted area expected to be at least 1 km 2 .
Project No PS213278 Upper Mundic Gully TSF Stage 1 and 2 DBA and CCA Mount Morgan Gold Mine Heritage Minerals
WSP May 2026 Page 34
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