Original EA Amendment

12 February 2020

20137096-009 Rev A

Figure 1: Proposed TSF layout - red-dashed line shows catchment to RL 335 m.

3.2

Design parameters

The design parameters and criteria adopted for the concept level design of the TSF are summarised in Table 1.

Table 1: Design parameters and criteria summary

Parameter

Design Input

Reference

Storage Requirement

12 to 36 Mt (9 to 27 Mm 3 )

TSF storage capacity

HML

Tailings Characteristics

1.35 t/m 3

Average tailings settled dry density

Assumed

Beach slope

0.5%

Assumed

Stage storage curve

Figure 2

Foundation Condition

Soil/Tailings

3 m of tailings within the gully (TBC)

Assumed

Bedrock

TBC

Stockpile

Location and thickness TBC

Embankment Design

Embankment raising technique

Downstream (towards pit)

6

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