Description
Criteria
Units
Basis Value
Source
Wet season water storage allowance
1:100 AEP 3 month wet season rainfall depth 120 hr Probable Maximum Precipitation
mm
1,260
[3]
Design Flood Event
mm
2,620
[4], Refer Appendix C
Extreme storm storage
1:1,000 AEP 72 hr storm
mm
1,020
[5]
Minimum decant pond depth
-
m
No allowance at this stage
-
Project No PS213278 Upper Mundic Gully TSF Concept Design to RL 390 m Mount Morgan Project Heritage Minerals
WSP October 2025 Page 6
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