Advantages
Option
Disadvantages
limits the maximum height to Stage 4. Constructing higher stages results in the embankment potentially overlying the Mundic Gully failure point which can not be remediated until latent tailings are removed from this mine feature Requires an amendment to the EA Water balance modelling undertaken as part of a previous EA amendment indicates that further deposition of processed tailings into the OCP is not viable as it slightly increases potential risks that may contribute to an uncontrollable overtopping event in an extreme weather event. Requires an amendment to the EA Regulations would not permit the storage of tailings in a storage tank Risks associated with overtopping events if tailings volumes are greater than forecasted Not a permanent solution to tailings management
•
Permanently stores processed tailings
•
•
Discharge additional processed tailings into the OCP
•
Store produced tailings in storage tanks
Temporarily stores processed tailings
•
•
•
•
3.2.2. Amendment #2
There are no viable alternatives to Amendment #2 as updating Table A1 and associated Schedule 1 -
Figure 1 in the EA is required to facilitate that the EA holder can lawfully conduct mining activities and
not be in breach of relevant conditions.
3.2.3. Amendment #3
There are no viable alternatives to Amendment #3 as fixing erroneous information in the EA is required
to facilitate that the EA holder can lawfully conduct mining activities and not be in breach of relevant
conditions.
3.3. Standard Criteria Assessment
The EP Act requires ERAs to be authorised by DETSI. When considering an application to amend an
EA or when deciding on the conditions of an EA, DETSI must consider certain matters set out under
the EP Act. One of those matters is the ‘Standard Criteria’. The purpose of this assessment is to address
each of these criteria to demonstrate how they will be met by Heritage Minerals for the amendments
described within. An assessment of the proposed amendments against the standard criteria is provided
in Table 16.
63
Wulguru Technical Services Pty Ltd – Supporting Information Report
Powered by FlippingBook