Mount Morgan Mine Upper Mundic Gully TSF EA Amendment

Figure 4.7

Comparison of historical failure peak discharge against dam height

The estimated peak discharge for the STSF failure outflow hydrograph falls within the general envelope of historical dam failure releases. Although it should be noted that the peak discharge is affected by multiple factors (including embankment geometry, embankment type and impoundment volume), the estimated peak discharge is a reasonable estimate for this assessment.

Project No PS213278 Sandstone Gully TSF Dam Break and Consequence Category Assessments Mount Morgan Gold Mine Heritage Minerals

WSP January 2025 Page 20

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