Data as at 14 September 2026 · from the Queensland EP Act public register
P-EA-100658735 · CENTURION COAL MINING PTY LTD
Coal environmental authority P-EA-100658735 (CENTURION COAL MINING PTY LTD), Granted. 81 conditions indexed. Holds PRC plan P-PRCP-100669070.
- Status
- Granted
- Holders
- CENTURION COAL MINING PTY LTD
- Tenures
- ML1790; ML70495
- PRC plan
- P-PRCP-100669070 · effective 2025-03-26
- How it was read
- Numbered conditions
- Register
- Register record · Instrument PDF
Conditions
81 numbered conditions read from the current instrument. Page numbers link into the register PDF.
- A1
Prevent and/or minimise likelihood of environmental harm In carrying out the environmentally relevant activities, the environmental authority holder must take all reasonable and practicable measures to prevent and/or to minimise the likelihood of environmental harm being caused. Any environmentally relevant activity, that, if carried out incompetently, or negligently, may cause environmental harm, in a manner that could have been prevented, shall be carried out in a proper manner in accordance with the conditions of this authority.
- A2
Maintenance of measures, plant and equipment The environmental authority holder must ensure: a) that all measures, plant and equipment necessary to ensure compliance with the conditions of this environmental authority are installed; b) that such measures, plant and equipment are maintained in a proper condition; and c) that such measures, plant and equipment are operated in a proper manner.
- A3
No change, replacement or alteration of any plant or equipment is permitted if the change, replacement or alteration increases, or is likely to substantially increase, the risk of unlawful environmental harm caused by the mining activities.
- A4
Monitoring Record, compile and keep for a minimum of five (5) years all monitoring results required by this environmental authority and make available for inspection all or any of these records upon request by the administering authority.
- A5
Where monitoring is a requirement of this environmental authority, ensure that a competent person(s) conducts all monitoring.
- A6
Record Keeping Unless otherwise specified by a condition of this environmental authority and records must be: a) kept for a period of 5 years; and b) provided to the administering authority upon request and in the format required. Notification of emergencies, incidents and exceptions
- A7
All reasonable actions are to be taken to minimise environmental harm, or potential environmental harm, resulting from any emergency, incident or circumstances not in accordance with the conditions of this environmental authority. Permit Environmental Authority
- A8
As soon as practicable after becoming aware of any emergency, incident or information about circumstances which results or may result in environmental harm not in accordance with the conditions of this environmental authority, the administering authority must be notified in writing.
- A9
Not more than ten (10) business days following the initial notification of an emergency, incident or information about circumstances which result or may result in environmental harm, written advice must be provided to the administering authority in relation to: a) proposed actions to prevent a recurrence of the emergency or incident; b) the outcomes of actions taken at the time to prevent or minimise environmental harm; and proposed actions to respond to the information about circumstances which result or may result in environmental harm.
- A10
As soon as practicable, but not more than six (6) weeks following the initial notification of an emergency, incident or information about circumstances which result or may result in environmental harm, environmental monitoring must be performed and written advice must be provided of the results of any such monitoring performed to the administering authority.
- A11
The notification of emergencies, incidents or circumstances (incident) which result or may result in environmental harm in accordance with condition A9 must include but not be limited to the following: a) the holder of the environmental authority; b) the location of the incident; c) the number of the environmental authority; d) the name and telephone number of the designated contact person; e) the time of the incident; f) the time the holder of the environmental authority became aware of the incident; g) the suspected cause of the incident; h) the environmental harm caused, threatened, or suspected to be caused by the incident; and actions taken to prevent any further incident and mitigate any environmental harm caused by the incident.
- A12
Mining activities - general All land subject to mining activities must be rehabilitated to a non-polluting, safe, stable and self-sustaining landform.
- A13
Contaminants must not be released to the receiving environment unless they are in accordance with the contaminant limits authorised by this environmental authority.
- A14
This environmental authority does not authorise environmental harm unless a condition contained within the authority explicitly authorises that harm. Where there is no condition or the authority is silent on a matter, the lack of a condition or silence shall not be construed as authorising harm. Permit Environmental Authority
- A15
The only mining activities to be carried out under this environmental authority are the mining activities defined within the parameters in Table 1 (Mining Activities) and identified in Figures 1 to 4 attached to this environmental authority. Note: Variation of mining activities to those identified within the conceptual designs is considered to be in accordance with these conditions as long as the variation is not significantly different to the conceptual design or causes a significant increase in environmental harm.
- A16
Definitions Words and phrases used throughout this environmental authority are defined in the Definitions section of this authority. Where a definition for a term used in this environmental authority is sought and the term is not defined within this environmental authority, the definitions in the Environmental Protection Act 1994, its regulations and policies must be used. Conditions
- A17
The conditions of this environmental authority are in force until a surrender of the authority is accepted pursuant to the Environmental Protection Act 1994. The conditions apply unless an amendment is approved pursuant to the Environmental Protection Act 1994. Table 1 (Mining Activities) Mine Domain Mine Feature Location Maximum Disturbance Constraints Exploration activities Domain (GDA2020) Area Ancillary Infrastructure Total disturbed area must not Drill holes and As per 1400 metres squared exceed 1.4 ha pads Figure 1 per drill pad Total disturbed area must not Vertical and As per 6400 metres squared exceed 11.80ha lateral wells Figure 1 per drill pad Quantity: 310 drill holes Historic holes As per 3000 metres squared and pads Figure 1 per drill pad Scale and intensity Roads and As per tracks Figure 1 Permit Environmental Authority Schedule B: Air Condition Condition number
- B1
Dust nuisance Subject to conditions B2 and B3 of this environmental authority, the release of dust or particulate matter or both resulting from the mining activity must not cause an environmental nuisance, at any sensitive or commercial place.
- B2
When requested by the administering authority, dust and particulate monitoring must be undertaken within a reasonable and practicable timeframe nominated by the administering authority to investigate any complaint (which is neither frivolous nor vexatious nor based on mistaken belief in the opinion of the authorised officer) of environmental nuisance at any sensitive or commercial place, and the results must be notified within 14 days to the administering authority following completion of monitoring.
- B3
If the environmental authority holder can provide evidence through monitoring that the following limits are not being exceeded then the holder is not in breach of B1: a) dust deposition of 120 milligrams per square metre per day, averaged over one month, when monitored in accordance with AS 3580.10.1 Methods for sampling and analysis of ambient air - Determination of particulates - Deposited matter - Gravimetric method of 1991 (or more recent editions), or b) a concentration of particulate matter with an aerodynamic diameter of less than 10 micrometre (m) (PM10) suspended in the atmosphere of 50 micrograms per cubic metre over a 24 hour averaging time, at a sensitive or commercial place downwind of the operational land, when monitored in accordance with i. Particulate matter - Determination of suspended particulate PM10 high-volume sampler with size-selective inlet - Gravimetric method, when monitored in accordance with AS 3580.9.6 Methods for sampling and analysis of ambient air - Determination of suspended particulate matter - PM10 high volume sampler with size-selective inlet - Gravimetric method of 1990 (or more recent editions); or any alternative method of sampling PM10, which may be permitted by the Air Quality Sampling Manual as published from time to time by the administering authority.
- B4
If monitoring indicates exceedance of the relevant limits in condition B3, then the environmental authority holder must: a) address the complaint including the use of appropriate dispute resolution if required; and b) immediately implement dust abatement measures so that emissions of dust from the activity do not result in further environmental nuisance.
- B5
Greenhouse Gas Abatement Plan The following Greenhouse Gas Abatement Plan must be implemented and complied with whilst the EA is in force and any activities are being carried out: - Greenhouse Gas Abatement Plan, Centurion Coal Mining Pty Ltd, (version 5) or as updated from time to time as allowed under condition B6. Permit Environmental Authority
- B6
The GHG abatement plan must be reviewed every year to update the annual emission targets (as expressed in t CO2-e) to reflect actual production variables and the emission reduction program to incorporate opportunities to further reduce emissions and improve energy efficiency.
- B7
Updates to the Greenhouse Gas Abatement Plan carried out under condition B6 must meet the requirements of Appendix A of the latest version of the Queensland Greenhouse Gas
- B8
Audit An appropriately qualified person must submit an annual audit by 1 November to determine whether the Greenhouse Gas Abatement Plan has been implemented and complied with during the previous 12 months (July 1 - June 30).
- B9
Statement of compliance A statement of compliance must be prepared about the work undertaken to implement and comply with the GHG Abatement Plan. The statement of compliance must: a. be prepared by an appropriately qualified person; and b. consider the following compliance criteria: i. whether the emission reduction targets in the Greenhouse Gas Abatement Plan have been correctly calculated and met. ii. whether the emission reduction measures in the Greenhouse Gas Emission Reduction Program have been implemented. iii. whether the Greenhouse Gas Abatement Plan has been reviewed in accordance with review provisions in the Greenhouse Gas Abatement Plan. iv. whether greenhouse gas emissions have been monitored in accordance with the monitoring program in the Greenhouse Gas Abatement Plan. v. whether public reporting on progress toward the emission reduction targets has been carried out in accordance with the reporting program in the Greenhouse Gas Abatement Plan. c. state whether the work complies with the above compliance criteria. d. be supported by the following information: i. methodology, assumptions and input data used to determine greenhouse gas emissions. Public reporting Within 20 business days of the audit being completed under condition B8 the following
- B10
information must be published on the environmental authority holder's website: a. the statement of compliance required under condition B9; and b. the latest version of the Greenhouse Gas Abatement Plan. Permit Environmental Authority
- B11
Non-compliance Any non-compliance with the Greenhouse Gas Abatement Plan must be reported to the administering authority in accordance with the general Conditions A7, A8, A9 and A10 for contravention of a condition.
- B12
The holder of this environmental authority must establish a monitoring and mitigation program to minimise methane emissions from leaking and venting in the absence of flaring units
- B13
A Gas Drainage Management Plan must be developed by an independent suitably qualified person and implemented, for the Centurion North Project. This plan must be submitted to the administering authority upon request. The Gas Drainage Management Plan must ensure that: - Flaring is implemented as a minimum abatement measure for drainage gas destruction. - Enclosed flares are prioritized where practicable due to their higher
- B14
destruction efficiency. - Flare downtime is minimized to reduce methane venting through measures such as self-ignition functionality and a rectification program to address potential self- ignition failures. - Methane leakage is minimized through measures such as a periodic leak detection and repair program. Permit Environmental Authority Schedule C: Water Condition Condition number
- C1
Contaminant release Contaminants that will or have the potential to cause environmental harm must not be released directly or indirectly to any waters.
- C2
Water reuse Water contaminated by mining activity may be piped or trucked or transferred by some other means that does not contravene the conditions of this authority during periods of dry weather for the purpose of supplying stock water to directly adjoining properties owned by the environmental authority holder or a third party and subject to compliance with the quality release limits specified in Table 2 (Stock water release limits). Water contaminated by mining activity may be piped or trucked or transferred by some other means that does not contravene the conditions of this authority during periods of dry
- C3
weather for the purpose of supplying irrigation water to directly adjoining properties owned by the environmental authority holder or a third party and subject to compliance with quality release limits in Table 3 (Irrigation water release limits). Table 2 (Stock water release limits) Quality characteristic Units Minimum Maximum pH pH units 6.5 8.5 -S/cm N/A 5000 Electrical Conductivity Table 3 (Irrigation water release limits) Quality characteristic Units Minimum Maximum pH pH units 6.5 8.5 Electrical Conductivity -S/cm N/A TBD [Note 1] [Note 1] A site-specific value to be determined in accordance with ANZECC & ARMCANZ (2000) Irrigation Guidelines
- C4
Water contaminated by mining activity may be piped or trucked off the mining lease for the purpose of supplying water to a third party for purpose of construction and/or road maintenance in accordance with the conditions of this environmental authority.
- C5
If the responsibility of water contaminated by mining activities (the water) is given or transferred to another person in accordance with conditions C2, C3 or C4: a) the responsibility of the water must only be given or transferred in accordance with a written agreement (the third party agreement); and b) include in the third party agreement a commitment from the person utilising the water to use water in such a way as to prevent environmental harm or public health incidences and specifically make the persons aware of the General Environmental Duty (GED) under section 319 of the Environmental Protection Act 1994, environmental sustainability of the water disposal and protection of environmental values of waters. Permit Environmental Authority
- C5
If the responsibility of water contaminated by mining activities (the water) is given or transferred to another person in accordance with conditions C2, C3 or C4: c) the responsibility of the water must only be given or transferred in accordance with a written agreement (the third party agreement); and d) include in the third party agreement a commitment from the person utilising the water to use water in such a way as to prevent environmental harm or public health incidences and specifically make the persons aware of the General Environmental Duty (GED) under section 319 of the Environmental Protection Act 1994, environmental sustainability of the water disposal and protection of environmental values of waters.
- C6
Water general All determinations of water quality must be: a) performed by a person or body possessing appropriate experience and qualifications to perform the required measurements; b) made in accordance with methods prescribed in the latest edition of the administering authority's Water Quality Sampling Manual; c) collected from the monitoring locations identified within this environmental authority, within 10 hours of each other where possible; d) carried out on representative samples; and e) laboratory testing must be undertaken using a laboratory accredited (e.g. NATA) for the method of analysis being used. Note: Condition C6 requires the Water Quality Manual to be followed and where it is not followed because of exceptional circumstances this should be explained and reported with the results.
- C7
Temporary interference with waterways Temporarily destroying native vegetation, excavating, or placing fill in a watercourse, lake or spring necessary for and associated with mining activity must be undertaken in accordance Watercourse, Lake or Spring associated with Mining Activities.
- C8
Saline drainage The holder of this environmental authority must ensure proper and effective measures are taken to avoid or otherwise minimise the generation and/or release of saline drainage.
- C9
Acid rock drainage The holder of this environmental authority must ensure proper and effective measures are taken to avoid or otherwise minimise the generation and/or release of acid rock drainage.
- C10
Stormwater and water sediment controls An erosion and sediment control plan must be developed by an appropriately qualified person and implemented for all stages of the exploration and mining activities on the site to minimise erosion and the release of sediment to waters and contamination of stormwater.
- C11
The maintenance and cleaning of any vehicles, plant or equipment must not be carried out in areas from which contaminants can be released into any receiving waters. Permit Environmental Authority Any spillage of wastes, contaminants or other materials must be cleaned up as quickly as
- C12
practicable to minimise the release of wastes, contaminants or materials to any stormwater drainage system or receiving waters. Permit Environmental Authority Schedule D: Acoustic Condition Condition number
- D1
Noise and Vibration Subject to conditions D2 and D3, noise from the mining activity must not cause an environmental nuisance at any sensitive or commercial place.
- D2
When requested by the administering authority, noise monitoring must be undertaken within a reasonable and practicable timeframe nominated by the administering authority to investigate any complaint (which is neither frivolous nor vexatious nor based on mistaken belief in the opinion of the authorised officer) of environmental nuisance at any sensitive or commercial place, and the results must be notified within 14 days to the administering authority following completion of monitoring.
- D3
If the environmental authority holder can provide evidence through monitoring that the limits defined in Table 4 (Noise Limits), are not being exceeded then the holder is not in breach of condition D1. Monitoring must include: a) LA, max adj, T; b) relevant background sound level; c) the level and frequency of occurrence of impulsive or tonal noise; d) atmospheric conditions including wind speed and direction; and e) location, date and time of recording.
- D4
If monitoring indicates exceedance of the limits in Table 4 (Noise Limits), then the environmental authority holder must: a) address the complaint including the use of appropriate dispute resolution if required; and b) immediately implement noise abatement measures so that emissions of noise from the activity do not result in further environmental nuisance.
- D5
The method of measurement and reporting of noise levels must comply with the latest edition of the administering authority's Noise Measurement Manual. Table 4 (Noise Limits) Noise Levels dB(A) Monday to Sunday (including public holidays) 7am-6pm 6pm-10pm 10pm-7am Noise measured at a `sensitive or commercial place' LA10, adj, 10mins B/G + 5 B/G + 5 B/G + 3 LA1, adj, 10mins B/G + 10 B/G + 10 B/G + 5 Note: Where "Background" means background sound pressure level measured in accordance with the latest edition of the administering authority's Noise Measurement Manual. Table 4 (Noise Limits) does not purport to set operating hours for the mining activities. Permit Environmental Authority Schedule E: Waste Condition Condition number
- E1
Storage of tyres Scrap tyres stored awaiting disposal or transport for take-back and recycling, or waste- to- energy options must be stored in stable stacks and at least 10 metres from any other scrap tyre storage area, or combustible or flammable material, including vegetation.
- E2
All reasonable and practicable fire prevention measures must be implemented, including removal of grass and other materials within a 10 metre radius of the scrap tyre storage area.
- E3
Where possible and practical, cleared vegetation must be mulched and/or replaced in rehabilitated areas. Cleared vegetation may be burnt as a last resort and only if there is minimal risk of causing nuisance to the neighbouring sensitive receptors. Note: This condition does not exempt the environmental authority holder from obtaining any approval required under other legislation to conduct a burn.
- E4
General waste must not be burnt or be allowed to burn on the licensed site unless permitted by the administering authority. Note: This condition does not exempt the environmental authority holder from obtaining any approval required under other legislation to conduct a burn.
- E5
All regulated waste removed from the site must be removed by a person who holds a current approval to transport such waste under the provisions of the Environmental Protection Act 1994.
- E6
Regulated waste must only be removed to a facility licensed under the Environmental Protection Act 1994 to receive such waste. Permit Environmental Authority Schedule F: Land Condition Condition number
- F1
Preventing contaminant release to land Contaminants must not be released to land in manner which constitutes nuisance, material
- F2
or serious environmental harm.
- F3
Storage and Spillage of Chemicals and Flammable or Combustible Liquids
- F4
All flammable or combustible liquids must be contained within an on-site containment system and controlled in a manner that prevents environmental harm and maintained in
- F5
accordance with the current version of AS 1940 - Storage and handling of flammable and combustible liquids. F6 Spillage of all flammable and combustible liquids must be controlled in a manner that
- F7
prevents environmental harm. F8
- F10
Topsoil must be strategically stripped ahead of exploration activity and stockpiled no more than 2 metres in height to preserve topsoil bio-organic integrity. Exploration The environmental authority holder is authorised to carry out exploration activities listed in Table 1 (Mining Activities) in and within 500m of any Category B Environmentally Sensitive Area. When carrying out exploration activities in and within 500m of any Category B Environmentally Sensitive Area the holder of the environmental authority must do so in accordance with conditions F6 to F22. In carrying out exploration activities on mining leases (ML) ML1790 and ML70495, all reasonable and practicable measures must be taken to prevent or minimise the likelihood of environmental harm being caused to any Category B Environmentally Sensitive Area (ESA). Exploration activities undertaken must be consistent with Figures 1 to 4 attached to this environmental authority. Exploration activities undertaken must be consistent with Control Strategies as outlined in Section 3 of the Environmental Management Plan for Wards Well, 2012. The operational area of individual drill sites must not exceed 6400 square metres. The construction of sumps must not exceed 12 square metres.
- F11
Drill holes are to be a maximum of 400mm in diameter.
- F12
Existing access and fence line tracks must be used wherever possible. New tracks must be constructed to a width of less than 5 metres. Permit Environmental Authority
- F13
Authorised track construction involving blade clearing of established ground cover vegetation and/or clearing of mature trees is to be minimised in accordance with condition F12.
- F14
All new tracks are to be recorded with GPS in GDA2020 coordinate system and records kept of their location and made available to the administering authority on request.
- F15
Tracks should not be used when soil is saturated and prone to displacement or erosion by vehicle movement.
- F16
All equipment such as earthmoving and drilling equipment must be used in a manner which prevents the spread of weeds and minimises unnecessary disturbance of topsoil and ground cover vegetation.
- F17
Prior to entering the project area, all vehicles, machinery and equipment must be washed down in accordance with the latest version of the Queensland Department of Primary Industries (or its successor) checklist for clean down procedures.
- F18
Campsites must not be established within a Category B Environmentally Sensitive Area or within 500m of a Category B Environmentally Sensitive Area.
- F19
Sediment control barriers installed on ML1790 and ML70495 should be made of non- organic material to prevent the spread of weeds. Note: For example, synthetic sediment fencing is to be used.
- F20
Rehabilitation of areas disturbed in Category B Environmentally Sensitive Area or within 500m of a Category B Environmentally Sensitive Area must commence as soon as practicable to the extent that erosion impacts are minimised and be completed as soon as practicable but no longer than three (3) months after completion of the disturbance activity.
- F21
An annual report must be prepared and submitted with each annual return. The report must include a map showing the location of completed drill holes authorised by this environmental authority and include full details of progressive rehabilitation works completed to demonstrate compliance with condition F20 of this environmental authority. Note: Progressive rehabilitation refers to pad by pad rehabilitation as practical.
- F22
Prescribed environmental matters - matters of State environmental significance Impacts to matters of State environmental significant (MSES) as a result of carrying out exploration activities must only occur to the maximum extent stated in Table F1 - Authorised residual impacts to MSES and consistent with general exploration activities depicted in Figure 3 `Authorised impacts to MSES Regulated Vegetation' and Figure 4 `Authorised impacts to MSES Protected Wildlife Habitat'.
- F23
All impacts to MSES must be determined, documented, and mapped by an appropriately qualified person. Permit Environmental Authority
- F24
Records of impacts to MSES in condition F22 must be kept for the life of the environmental authority and include: a) The size and extent of impact; and b) Details about the condition of the MSES (e.g. dominant vegetation and remnant status); and A determination of whether the impact is a significant residual impact.
- F25
PRCP Schedule Rehabilitation of the disturbed land must be carried out in accordance with the approved Progressive Rehabilitation and Closure Plan (PRCP) schedule for this environmental authority. Surrender
- F26
The holder must meet the conditions and rehabilitation milestones under the PRCP schedule prior to the surrender of the environmental authority. Table F1 `Authorised residual impact to prescribed environmental matters' Prescribed environmental matters - Location of impact Offset requirements Maximum matter of State environmental under Environmental extent of significance (MSES) Offsets Act 2014 impact (ha) Regulated vegetation - Endangered or Of Concern Regional Ecosystem Grassland Regional Ecosystem In accordance with Figure 3 No 1.81 (11.8.11) Sparse Regional Ecosystem In accordance with Figure 3 No 0 (11.3.4, 11.4.2) Dense / Mid Dense Regional In accordance with Figure 3 No 0 Ecosystem (11.3.1, 11.9.5) Regulated Vegetation - Located in the defined distance from the defining banks of a watercourse Grassland Regional Ecosystem In accordance with Figure 3 No 0 (11.8.11) Sparse Regional Ecosystem In accordance with Figure 3 No 0 (11.3.4, 11.4.2) Dense / Mid Dense Regional In accordance with Figure 3 No 0 Ecosystem (11.3.1) Protected Wildlife Habitat - Essential habitat for an endangered or vulnerable animal or plant Dichanthium queenslandicum In accordance with Figure 4 No 1.81 (King Blue Grass) Ornamental Snake In accordance with Figure 4 No 6.45 Protected Wildlife Habitat - A habitat for endangered or vulnerable wildlife or Special Least Concern animal Squatter Pigeon In accordance with Figure 4 No 7.54 Grey Falcon In accordance with Figure 4 No 1.50 Fork Tailed Swift In accordance with Figure 4 No 1.50 Koala In accordance with Figure 4 No 7.15 Greater Glider In accordance with Figure 4 No 0.88 Short Beaked Echidna In accordance with Figure 4 No 7.95
- G1
All complaints received must be recorded including investigations undertaken, conclusions formed, and action taken. This information must be made available to the administering authority on request.
- G2
The holder of this environmental authority must record the following details for all complaints received and provide this information to the administering authority on request: a) name, address and contact number for complainant (if not available; record `not identified'); b) time and date of complaint; c) investigations undertaken; d) conclusions formed; e) actions taken to resolve complaint; f) any abatement measures implemented; and g) person responsible for resolving the complaint. When requested by the administering authority, the environmental authority holder must undertake relevant specified monitoring within a reasonable and practicable timeframe nominated by the administering authority to investigate any complaint of environmental
- G3
harm at any sensitive place or commercial place. The results of the investigation (including an analysis an interpretation of the monitoring results) and abatement measures implemented must be provided to the administering authority within fourteen (14) days of completion of the investigation. END OF CONDITIONS Permit Environmental Authority Definitions Key terms and/or phrases used in this document are defined in this section. Where a term is not defined, the definition in the Environmental Protection Act 1994, its regulations or environmental protection policies must be used. If a word remains undefined it has its ordinary meaning. Accepted engineering standards in relation to dams, means those standards of design, construction, operation and maintenance that are broadly accepted within the profession of engineering as being good practice for the purpose and application being considered. In the case of dams, the most relevant documents would be publications of the Australian National Committee on Large Dams (ANCOLD), guidelines published by Queensland government departments, and relevant Australian and New Zealand Standards. Acid rock drainage means any contaminated discharge emanating from a mining activity formed through a series of chemical and biological reactions, when geological strata is disturbed and exposed to oxygen and moisture as a result of mining activity. Administering authority is the agency or department that administers the environmental authority provisions under the Environmental Protection Act 1994. Airblast overpressure means energy transmitted from the blast site within the atmosphere in the form of pressure waves. The maximum excess pressure in this wave, above ambient pressure is the peak airblast overpressure measured in decibels linear (dBL). Annual exceedance probability or AEP means the probability that at least one event in excess of a particular magnitude will occur in any given year. ANZECC means the Australian and New Zealand Guidelines for Fresh Marine Water Quality 2000 Appropriately qualified person means a person who has professional qualifications, training, skills or experience relevant to the nominated subject matter and can give authoritative assessment, advice and analysis on performance relative to the subject matter using the relevant protocols, standards, methods or literature. Assessed or assessment by a suitably qualified and experienced person in relation to a consequence assessment of a dam, means that a statutory declaration has been made by that person and, when taken together with any attached or appended documents referenced in that declaration, all of the following aspects are addressed and are sufficient to allow an independent audit of the assessment: a) exactly what has been assessed and the precise nature of that determination; b) the relevant legislative, regulatory and technical criteria on which the assessment has been based; c) the relevant data and facts on which the assessment has been based, the source of that material, and the efforts made to obtain all relevant data and facts; and d) the reasoning on which the assessment has been based using the relevant data and facts, and the relevant criteria. Authority means an environmental authority or a development approval.