Environmenta l harm
Consequence Category
High
Significant
Low
General environmental harm
Location such that: a
Location such that contaminants may be released so that adverse effects (that are not already authorised to be disturbed to at least the same extent under other conditions of the authority subject to any applicable offset commitment) either: a Would be likely to be caused to Significant Values but those adverse effects would not be likely to meet the thresholds for the High consequence category and instead would be likely to cause at least one of the following: i loss or damage or remedial costs greater than $10,000,000 but less than $50,000,000; or ii remediation of damage is likely to take more than 6 months but less than 3 years; or iii significant alteration to existing ecosystems; or iv the area of damage
Location such that either: a
Contaminants may be released to areas of MNES, MSES or HEV waters that are not already authorised to be disturbed to at least the same extent under other conditions of this authority subject to any applicable offset commitment (Significant Values); and Adverse effects on Significant Values are likely; and The adverse effects are likely to cause at least one of the following: i loss or damage or
Contaminants are unlikely to be released to areas of
Significant Values or Moderate Values; or
b
Contaminants are likely to be released to those areas, but would be unlikely to meet any of the minimum thresholds specified for the Significant Consequence Category for adverse effects
b
c
remedial costs greater than $50,000,000; or
ii remediation of damage is likely to take 3 years or more; or iii permanent alteration to existing ecosystems; or iv the area of damage
(including downstream effects) is likely to be at least 5km 2 .
(including downstream effects) is likely to be at least 1 km 2 but less than 5 km 2 . Or
b
Would be likely to be caused to environmental values classed as slightly or moderately disturbed waters, wetland of general ecological significance, riverine areas, springs or lakes and associated flora and fauna (Moderate Values), and the adverse effects are likely to cause at least one of the following: i loss or damage or
remedial costs greater than $20,000,000; or
Project No PS213278 Upper Mundic Gully TSF Stage 1 and 2 DBA and CCA Mount Morgan Gold Mine Heritage Minerals
WSP May 2026 Page 24
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