Owner: AGL Macquarie Pty Limited
Status:
Technology Type: Turbine - Steam Sub Critical
Fuel Type: Fossil - Black Coal
DUID: BW04
Capacity: 0 MW
Full Commercial Use Date:
Expected Closure Year:
Closure Date:
29 May 2026 04:00 → 30 May 2026 04:00 AEST · data through 30 May 2026, 04:00
Dispatch target (cleared) vs availability — 5‑minute intervals. NSW1 regional price (RRP) on right axis.
Estimated $ per interval using regional RRP and MLF effective on each day.
UNIT_SOLUTION (5‑minute intervals). Intervention intervals excluded.dispatch_price RRP matched by settlement time and NEM region (from generator registry).| Effective from | MLF |
|---|---|
| 2024-07-01 | 0.9663 |
| 2025-07-01 | 0.9632 |
| Capex total | $50.00M |
|---|---|
| Capex / MW | $72,993 |
| Capex / MWh storage | — |
| Fixed OPEX (annual) | $19.18M |
| Fixed OPEX / MW-yr | $28,000 |
| Variable OPEX / MWh | $8.00 |
| Fuel cost / GJ | $2.54 |
| Heat rate GJ/MWh | 9.45 |
Confidence: medium · Status: ai estimated · Capex basis: estimated · AI checked 04 Jun 2026
Notes: No specific financial data available for Bayswater. Estimates and defaults may be applied in absence of specific values.
[AI 2026-06-04] Unit-specific BW04 construction capex was not found. The capex profile uses the reported June-1979 Bayswater first-stage estimate of AUD 590m for 2 x 660 MW plus associated coal and water supplies, converted to AUD/MW and allocated to the requested 685 MW unit; therefore capex_basis is estimated and nominal 1979 dollars are preserved. Fixed and variable O&M are from AEMO/Jacobs modelling assumptions for Bayswater and are not recent AGL reported actuals. Fuel cost per GJ is inferred from AGL FY25 portfolio coal fuel cost per MWh and AEMO heat rate, and should be reviewed against confidential coal contracts. Bayswater's targeted closure by end-2033 implies roughly 47-48 years from 1985-86 commissioning; AGL states the station will be approximately 50 years old by closure. Major refurbishment/upgrade notes include AUD 63m DCS/control-system works approved in 2016 and more than AUD 200m turbine efficiency/maintenance upgrade from 2018, intended to add 100 MW without additional coal consumption or emissions; AGL later reports 3 x 25 MW upgrades in its capacity metrics.
[AI 2026-06-04] BW04-specific construction capex was not found. capex_total_aud is an estimate: half of the official June-1979 $590 million cost estimate for the first stage of Bayswater comprising 2 x 660 MW units and associated coal/water supplies. This may not correspond exactly to Unit 4/BW04. Fixed and variable O&M are station-level AEMO/Jacobs assumptions from a 2016 AEMO retail price modelling input table and are applied to the 685 MW unit capacity. Fuel cost is an AEMO 2024 ISP Bayswater assumption cited in IEEFA's submission and may differ from AGL's actual realised coal costs. Heat-rate sources differ: the 2016 AEMO/Jacobs table shows 10.00 GJ/MWh sent-out, while later AEMO/IEEFA material shows about 9.4-9.45 GJ/MWh; the profile uses 9.45 GJ/MWh. Emissions intensity uses Clean Energy Regulator 2023-24 facility data for Bayswater. Asset life is inferred from commissioning in 1985 and AGL's target closure by end-2033. Major refurbishment/maintenance notes include the $150 million turbine efficiency upgrade, $63 million DCS project, $35.9 million environmental/ash/water upgrade approval, and $130 million 2025 major Bayswater outage.
[AI 2026-06-04] Capex_total_aud is not original 1980s construction cost. No reliable public source was found for original Bayswater construction capex; the value used is AGL's reported 2018 station upgrade/maintenance program of more than $200m, which improved capacity/efficiency and is station-wide, not BW04-only. A 2016 AGL project separately reported $63m for a station-wide distributed control system. Fixed and variable O&M are default technology assumptions from AEMO/GHD 2019 black-coal-without-CCS cost parameters in real 2018-19 AUD, applied to BW04's 685 MW capacity; they are not reported Bayswater unit accounts. Heat rate is AEMO's Bayswater static heat rate. Efficiency is calculated from heat rate using HHV efficiency = 3.6 / 9.45 = 38.1%; a parliamentary source reports a lower sent-out HHV efficiency of 35.9%. Emissions intensity uses the Bayswater EIS range of about 0.93-0.95 tCO2e/MWh sent-out; 0.94 is the midpoint. Asset life reflects commissioning in 1985 and AGL's current target closure by end-2033; the 2018 EIS stated a 50-year technical life to 2035, but AGL's current closure schedule is earlier.
[AI 2026-06-04] Bayswater Unit 4 (BW04) is one of four units at Bayswater. Public sources provide station-level rather than BW04-specific economics. Original 1980s construction cost was not found in accessible official sources. The capex value shown is an estimated one-quarter allocation of AGL's reported >AUD200m 2018 Bayswater turbine upgrade and ongoing outage-capex program, not original construction capex. Fixed and variable O&M are technology-default estimates for large black-coal subcritical plant without CCS from GHD/AEMO 2025; annual fixed opex is calculated as 685 MW × AUD28,000/MW-year. Asset life is calculated from 1985 commissioning to scheduled closure by end-2033; Nexa notes AEMO's generic technical-life assumption was 50 years and the original expected closure was 2035. Heat rate is AEMO station-level heat-rate data for Bayswater, not DUID-specific. Emissions intensity is AGL FY22 sent-out intensity for AGL Macquarie Bayswater; CER defines its own facility intensity on production rather than sent-out basis, and later CER/third-party values may differ.
Model: gpt-5.5 · Reasoning: medium · Fetched 04 Jun 2026 08:55 · ID: resp_011e4ad5dfaf1467006a20b067cbc88197b6e38396bf9652fa
{
"generator_identity": {
"site_name": "Bayswater",
"duid": "BW04",
"owner": "AGL Macquarie Pty Limited",
"region": "NSW1",
"technology_type": "Turbine - Steam Sub Critical",
"fuel_type": "Fossil - Black Coal"
},
"financial_profile": {
"generator_type_normalised": "black_coal",
"capex_total_aud": 50000000,
"capex_year": 2018,
"capex_basis": "estimated",
"capex_per_mw_aud": 72993,
"capex_per_mwh_aud": null,
"fixed_opex_annual_aud": 19180000,
"fixed_opex_per_mw_year_aud": 28000,
"variable_opex_per_mwh_aud": 8,
"fuel_cost_per_gj_aud": null,
"fuel_contract_notes": "AGL disclosed Bayswater/Liddell coal supply was reprofiled on production-cost-linked terms to 2028, supported by coal stockpiles; no public generator-specific AUD/GJ fuel price was found. AEMO/ACIL Allen model generator-specific NSW black-coal prices using contract positions, mining costs and export exposure, but public report text refers to workbook/detail rather than giving a Bayswater value in the accessible source.",
"heat_rate_gj_per_mwh": 9.45,
"efficiency_pct": 38.1,
"emissions_intensity_tco2_mwh": 0.95,
"asset_life_years": 48,
"discount_rate_pct": null,
"source_confidence": "medium",
"data_status": "partially_verified",
"notes": "Bayswater Unit 4 (BW04) is one of four units at Bayswater. Public sources provide station-level rather than BW04-specific economics. Original 1980s construction cost was not found in accessible official sources. The capex value shown is an estimated one-quarter allocation of AGL's reported >AUD200m 2018 Bayswater turbine upgrade and ongoing outage-capex program, not original construction capex. Fixed and variable O&M are technology-default estimates for large black-coal subcritical plant without CCS from GHD/AEMO 2025; annual fixed opex is calculated as 685 MW × AUD28,000/MW-year. Asset life is calculated from 1985 commissioning to scheduled closure by end-2033; Nexa notes AEMO's generic technical-life assumption was 50 years and the original expected closure was 2035. Heat rate is AEMO station-level heat-rate data for Bayswater, not DUID-specific. Emissions intensity is AGL FY22 sent-out intensity for AGL Macquarie Bayswater; CER defines its own facility intensity on production rather than sent-out basis, and later CER/third-party values may differ."
},
"sources": [
{
"field_name": "capex_total_aud",
"value_text": "Estimated BW04 allocation of >AUD200m Bayswater upgrade/ongoing outage-capex program; one quarter of station program = about AUD50m.",
"value_numeric": 50000000,
"unit": "AUD",
"source_url": "https://www.agl.com.au/about-agl/news-centre/2018/february/bayswater-power-station-upgrade-secures-additional-energy-supply-for-nsw?zcf97o=vlx3ap",
"source_title": "Bayswater Power Station upgrade secures additional energy supply for NSW",
"publisher": "AGL Energy",
"published_date": "2018-02-28",
"confidence": "medium",
"raw_excerpt": "AGL will spend more than $200 million and create 90 jobs during work to upgrade and maintain the coal-fired Bayswater Power Station... Subject to approvals, the upgrade works are expected to commence by February 2019 and span four years... includes ongoing outage capital expenditure to maintain reliability.",
"ai_summary": "AGL reported a >AUD200m station-level turbine upgrade and maintenance/outage capital program. The BW04 value is estimated by allocating one quarter of this four-unit station program to Unit 4."
},
{
"field_name": "capex_year",
"value_text": "Program announced in 2018; works expected from February 2019 over four years, fully operational by 2022.",
"value_numeric": 2018,
"unit": "year",
"source_url": "https://www.agl.com.au/about-agl/news-centre/2018/february/bayswater-power-station-upgrade-secures-additional-energy-supply-for-nsw?zcf97o=vlx3ap",
"source_title": "Bayswater Power Station upgrade secures additional energy supply for NSW",
"publisher": "AGL Energy",
"published_date": "2018-02-28",
"confidence": "high",
"raw_excerpt": "Published on 28 Feb, 2018... Subject to approvals, the upgrade works are expected to commence by February 2019 and span four years... all Bayswater’s upgraded turbines are fully operational by 2022.",
"ai_summary": "The relevant capex program was announced in 2018 and planned across 2019-2022."
},
{
"field_name": "capex_scope",
"value_text": "Turbine replacement/modern turbine technology plus ongoing outage capex to add 100 MW capacity without extra coal use or emissions.",
"value_numeric": null,
"unit": null,
"source_url": "https://www.agl.com.au/about-agl/news-centre/2018/february/bayswater-power-station-upgrade-secures-additional-energy-supply-for-nsw?zcf97o=vlx3ap",
"source_title": "Bayswater Power Station upgrade secures additional energy supply for NSW",
"publisher": "AGL Energy",
"published_date": "2018-02-28",
"confidence": "high",
"raw_excerpt": "By replacing the original turbines with modern turbine technology, Bayswater will have an additional 100 MW capacity... without the need for additional coal use... AGL has... contracted Toshiba as the principal contractor for the project.",
"ai_summary": "The capex scope was turbine efficiency/capacity upgrade and reliability maintenance rather than original construction."
},
{
"field_name": "major_refurbishment_or_closure_notes",
"value_text": "AUD63m distributed control system project for Bayswater, installation during planned outages from September 2017 until late 2019.",
"value_numeric": 63000000,
"unit": "AUD",
"source_url": "https://www.agl.com.au/about-agl/news-centre/2016/march/63-million-control-system-project-for-agl-macquarie",
"source_title": "$63 million control system project for AGL Macquarie",
"publisher": "AGL Energy",
"published_date": "2016-03-30",
"confidence": "high",
"raw_excerpt": "AGL Energy Limited... approved a $63 million project to install a Distributed Control System (DCS) at AGL Macquarie’s Bayswater power station... Installation... expected to start in September 2017... until late 2019.",
"ai_summary": "AGL reported a major controls/refurbishment investment at Bayswater before the turbine-upgrade program."
},
{
"field_name": "fixed_opex_per_mw_year_aud",
"value_text": "Large black coal sub-critical without CCS fixed O&M cost estimate: AUD28,000/MW net.",
"value_numeric": 28000,
"unit": "AUD/MW-year",
"source_url": "https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/ghd-2025-energy-technology-retirement-cost-om-estimate-review.pdf?rev=e2644c247ff7443a93c5ab09349fe0d9&sc_lang=en",
"source_title": "2025 Energy Technology Retirement Cost & O&M Estimate Review",
"publisher": "GHD for AEMO",
"published_date": "2025-07-31",
"confidence": "medium",
"raw_excerpt": "Table 4 O&M estimate – black coal sub-critical... Fixed O&M Cost $ / MW (Net)... Large w/out CCS 28,000... Based on preparation of a high-level bottom-up estimate.",
"ai_summary": "No BW04 fixed O&M disclosure was found; AEMO/GHD technology estimate for large black-coal subcritical plant is used."
},
{
"field_name": "fixed_opex_annual_aud",
"value_text": "Calculated from BW04 capacity 685 MW × AUD28,000/MW-year = AUD19.18m/year.",
"value_numeric": 19180000,
"unit": "AUD/year",
"source_url": "https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/ghd-2025-energy-technology-retirement-cost-om-estimate-review.pdf?rev=e2644c247ff7443a93c5ab09349fe0d9&sc_lang=en",
"source_title": "2025 Energy Technology Retirement Cost & O&M Estimate Review",
"publisher": "GHD for AEMO",
"published_date": "2025-07-31",
"confidence": "medium",
"raw_excerpt": "Fixed O&M Cost $ / MW (Net)... Large w/out CCS 28,000... Variable O&M Cost $ / MWh (Net) ... Large w/out CCS 8.",
"ai_summary": "Annual fixed O&M is derived by applying the AEMO/GHD large black-coal subcritical fixed O&M estimate to the user-provided 685 MW capacity for BW04."
},
{
"field_name": "variable_opex_per_mwh_aud",
"value_text": "Large black coal sub-critical without CCS variable O&M cost estimate: AUD8/MWh net.",
"value_numeric": 8,
"unit": "AUD/MWh",
"source_url": "https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/ghd-2025-energy-technology-retirement-cost-om-estimate-review.pdf?rev=e2644c247ff7443a93c5ab09349fe0d9&sc_lang=en",
"source_title": "2025 Energy Technology Retirement Cost & O&M Estimate Review",
"publisher": "GHD for AEMO",
"published_date": "2025-07-31",
"confidence": "medium",
"raw_excerpt": "Table 4 O&M estimate – black coal sub-critical... Variable O&M Cost $ / MWh (Net)... Large w/out CCS 8... Based on preparation of a high-level bottom-up estimate.",
"ai_summary": "No BW04 variable O&M disclosure was found; AEMO/GHD technology estimate for large black-coal subcritical plant is used."
},
{
"field_name": "fuel_contract_notes",
"value_text": "Production-cost-linked coal supply for Bayswater/Liddell to 2028; stockpile provided security of supply.",
"value_numeric": null,
"unit": null,
"source_url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/media-centre/2022/220819-fy22-results-presentation.pdf",
"source_title": "AGL Energy FY22 Full-Year Results Presentation",
"publisher": "AGL Energy",
"published_date": "2022-08-19",
"confidence": "high",
"raw_excerpt": "For Bayswater and Liddell, our reprofiled supply contract has provided consistent production cost-linked coal supply... Optimised Bayswater and Liddell supply contract on production cost-plus terms to 2028... Coal stockpile at Bayswater and Liddell providing security of supply (2m tonnes).",
"ai_summary": "AGL publicly described Bayswater's coal supply as production-cost-linked/cost-plus through 2028, with stockpile support; no AUD/GJ price was disclosed."
},
{
"field_name": "fuel_cost_per_gj_aud",
"value_text": "No public Bayswater AUD/GJ price found; AEMO/ACIL Allen model generator-specific coal prices considering contract positions, mine costs, export exposure and freight/handling costs.",
"value_numeric": null,
"unit": "AUD/GJ",
"source_url": "https://aemo.com.au/-/media/files/major-publications/isp/2025/acil-allen-2024-fuel-price-forecast-report.pdf",
"source_title": "Gas, liquid fuel, coal and renewable gas projections - Final report",
"publisher": "ACIL Allen for AEMO",
"published_date": "2025-07-31",
"confidence": "medium",
"raw_excerpt": "ACIL Allen maintains individual coal price projections for all incumbent coal generators in the NEM... takes into account mining costs, unique mine operational processes... export price, and freighting/handling costs... NSW black coal generators largely with export exposure.",
"ai_summary": "AEMO's fuel-price consultant models coal costs at generator level but the accessible report did not provide a specific Bayswater AUD/GJ figure."
},
{
"field_name": "heat_rate_gj_per_mwh",
"value_text": "AEMO heat-rate data search result lists Bayswater static heat rate 9.45 GJ/MWh.",
"value_numeric": 9.45,
"unit": "GJ/MWh",
"source_url": "https://wa.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf?la=en",
"source_title": "AEMO Heat Rate Data",
"publisher": "AEMO",
"published_date": "2025",
"confidence": "medium",
"raw_excerpt": "Generator | Static Heat rate ... Bayswater | 9.45 ...",
"ai_summary": "Station-level AEMO heat-rate data is used because no BW04-specific public heat rate was found."
},
{
"field_name": "efficiency_pct",
"value_text": "Calculated as 3.6 ÷ 9.45 GJ/MWh = 38.1%.",
"value_numeric": 38.1,
"unit": "%",
"source_url": "https://wa.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf?la=en",
"source_title": "AEMO Heat Rate Data",
"publisher": "AEMO",
"published_date": "2025",
"confidence": "medium",
"raw_excerpt": "Generator | Static Heat rate ... Bayswater | 9.45 ...",
"ai_summary": "Thermal efficiency is derived from the AEMO station heat-rate assumption using electricity output energy of 3.6 GJ/MWh."
},
{
"field_name": "emissions_intensity_tco2_mwh",
"value_text": "AGL Macquarie - Bayswater FY22 carbon intensity: 0.95 tCO2e/MWh, sent-out basis.",
"value_numeric": 0.95,
"unit": "tCO2e/MWh",
"source_url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/media-centre/2022/220819-fy22-results-presentation.pdf",
"source_title": "AGL Energy FY22 Full-Year Results Presentation",
"publisher": "AGL Energy",
"published_date": "2022-08-19",
"confidence": "high",
"raw_excerpt": "Asset... AGL Macquarie - Bayswater NSW Black coal Owned 2,690 0.95 FY22 sent out generation (GWh) 14,000.",
"ai_summary": "AGL disclosed Bayswater's FY22 sent-out emissions intensity as 0.95 tCO2e/MWh."
},
{
"field_name": "emissions_intensity_definition",
"value_text": "CER facility emissions intensity is reported scope 1 emissions divided by reported electricity production, while sent-out measures such as AEMO's can be higher.",
"value_numeric": null,
"unit": null,
"source_url": "https://cer.gov.au/markets/reports-and-data/nger-reporting-data-and-registers/electricity-sector-emissions-and-generation-data-2023-24",
"source_title": "Electricity sector emissions and generation data 2023–24",
"publisher": "Clean Energy Regulator",
"published_date": "2025-02-28",
"confidence": "high",
"raw_excerpt": "Emissions intensity data is defined as reported scope 1 emissions divided by reported electricity production... Emissions intensities elsewhere are more typically measured (including by AEMO) based on electricity sent out to the grid, which results in a higher emissions intensity.",
"ai_summary": "This source explains why AGL/AEMO sent-out emissions intensity may differ from CER production-basis facility intensity."
},
{
"field_name": "asset_life_years",
"value_text": "Calculated life to scheduled closure: 1985 commissioning to closure by end-2033 = about 48 years.",
"value_numeric": 48,
"unit": "years",
"source_url": "https://www.agl.com.au/about-agl/operations/agl-in-the-hunter",
"source_title": "AGL in the Hunter Region",
"publisher": "AGL Energy",
"published_date": null,
"confidence": "high",
"raw_excerpt": "Commissioned in 1985, Bayswater is a coal-fired power station with a capacity of 2,715 megawatts... Bayswater is scheduled to close by 2033... scheduled to close by the end of 2033.",
"ai_summary": "AGL states Bayswater was commissioned in 1985 and is scheduled to close by end-2033; this implies about a 48-year operating life."
},
{
"field_name": "asset_life_years",
"value_text": "Originally expected to close in 2035, in line with AEMO's generic 50-year technical life; AGL brought forward closure to between 2030 and 2033.",
"value_numeric": 50,
"unit": "years",
"source_url": "https://nexaadvisory.com.au/web/wp-content/uploads/2025/08/Nexa-Advisory-Bayswater-Power-Station-case-study.pdf",
"source_title": "Coal Performance in the National Electricity Market: Case Study 4 – Bayswater Power Station",
"publisher": "Nexa Advisory",
"published_date": "2025-08",
"confidence": "medium",
"raw_excerpt": "Commissioned in 1985... nameplate capacity of 2,715 MW across four generating units. Originally expected to close in 2035, in line with the generic 50-year technical life assumed by AEMO, AGL announced in 2022 that it would bring forward the closure to between 2030 and 2033.",
"ai_summary": "This supports a 50-year technical-life benchmark but also confirms Bayswater's announced earlier retirement window."
},
{
"field_name": "major_refurbishment_or_closure_notes",
"value_text": "Bayswater scheduled to close by end-2033; site to be transformed into Hunter Energy Hub.",
"value_numeric": 2033,
"unit": "year",
"source_url": "https://www.agl.com.au/about-agl/operations/agl-in-the-hunter",
"source_title": "AGL in the Hunter Region",
"publisher": "AGL Energy",
"published_date": null,
"confidence": "high",
"raw_excerpt": "Bayswater is scheduled to close by 2033 in line with our Climate Transition Action Plan... This coal-fired power station is scheduled to close by the end of 2033... transforming the Liddell and Bayswater site into the Hunter Energy Hub.",
"ai_summary": "AGL's current public operations page confirms the latest scheduled closure date and future site transition plan."
},
{
"field_name": "major_refurbishment_or_closure_notes",
"value_text": "AGL will spend more than AUD130m and take one of four units offline for planned maintenance in September 2025 on a four-year cycle; maintenance costs and outages are increasing with age.",
"value_numeric": 130000000,
"unit": "AUD",
"source_url": "https://www.abc.net.au/news/2025-06-13/bayswater-coal-fired-power-station-at-40-years/105403800",
"source_title": "Bayswater Power Station turns 40 as ageing infrastructure drives up energy bills",
"publisher": "ABC News",
"published_date": "2025-06-13",
"confidence": "medium",
"raw_excerpt": "As the 2033 closure date looms, maintenance costs continue to rise and planned and unplanned outages increase at Bayswater. AGL will spend more than $130 million and switch off one of four units for planned maintenance at Bayswater in September, which it does on a four-year cycle.",
"ai_summary": "A 2025 report indicates continuing major maintenance spending and age-related reliability issues."
},
{
"field_name": "generator_identity",
"value_text": "Bayswater commissioned in 1985; capacity 2,715 MW; four units; BW04 is one of the 685 MW units.",
"value_numeric": 685,
"unit": "MW",
"source_url": "https://www.agl.com.au/about-agl/operations/agl-in-the-hunter",
"source_title": "AGL in the Hunter Region",
"publisher": "AGL Energy",
"published_date": null,
"confidence": "high",
"raw_excerpt": "Commissioned in 1985, Bayswater is a coal-fired power station with a capacity of 2,715 megawatts... Four evaporative cooling towers... Bayswater produces around 15,000 gigawatt hours of electricity a year.",
"ai_summary": "AGL confirms station-level capacity and commissioning. The user-provided DUID BW04 capacity is consistent with the 2,715 MW station total comprising one 660 MW and three 685 MW units."
}
],
"warnings": [
"Original 1980s construction capex for Bayswater/BW04 was not found in accessible official or reputable sources; capex_total_aud is therefore an estimated allocation of a reported 2018 station-level upgrade/maintenance capex program, not construction cost.",
"Fixed O&M and variable O&M are AEMO/GHD technology-default estimates for large black-coal subcritical plant, not reported AGL/BW04 actual costs.",
"Fuel cost in AUD/GJ was not populated because AGL discloses contract structure but not price; AEMO/ACIL Allen generator-specific fuel-price work was identified but accessible text did not provide a Bayswater value.",
"Heat rate is station-level AEMO data; no BW04-specific heat-rate curve or unit heat rate was found.",
"Emissions intensity uses AGL FY22 sent-out figure; CER facility data uses a different production-basis definition, so values may differ across datasets.",
"Major maintenance/refurbishment notes are station-level and may not all apply specifically to BW04."
]
}
{
"meta": {
"model": "gpt-5.5",
"reasoning_effort": "medium",
"response_id": "resp_011e4ad5dfaf1467006a20b067cbc88197b6e38396bf9652fa",
"fetched_at": "2026-06-04T08:55:17+10:00"
},
"raw_text": "{\"generator_identity\":{\"site_name\":\"Bayswater\",\"duid\":\"BW04\",\"owner\":\"AGL Macquarie Pty Limited\",\"region\":\"NSW1\",\"technology_type\":\"Turbine - Steam Sub Critical\",\"fuel_type\":\"Fossil - Black Coal\"},\"financial_profile\":{\"generator_type_normalised\":\"black_coal\",\"capex_total_aud\":50000000,\"capex_year\":2018,\"capex_basis\":\"estimated\",\"capex_per_mw_aud\":72993,\"capex_per_mwh_aud\":null,\"fixed_opex_annual_aud\":19180000,\"fixed_opex_per_mw_year_aud\":28000,\"variable_opex_per_mwh_aud\":8,\"fuel_cost_per_gj_aud\":null,\"fuel_contract_notes\":\"AGL disclosed Bayswater/Liddell coal supply was reprofiled on production-cost-linked terms to 2028, supported by coal stockpiles; no public generator-specific AUD/GJ fuel price was found. AEMO/ACIL Allen model generator-specific NSW black-coal prices using contract positions, mining costs and export exposure, but public report text refers to workbook/detail rather than giving a Bayswater value in the accessible source.\",\"heat_rate_gj_per_mwh\":9.45,\"efficiency_pct\":38.1,\"emissions_intensity_tco2_mwh\":0.95,\"asset_life_years\":48,\"discount_rate_pct\":null,\"source_confidence\":\"medium\",\"data_status\":\"partially_verified\",\"notes\":\"Bayswater Unit 4 (BW04) is one of four units at Bayswater. Public sources provide station-level rather than BW04-specific economics. Original 1980s construction cost was not found in accessible official sources. The capex value shown is an estimated one-quarter allocation of AGL's reported >AUD200m 2018 Bayswater turbine upgrade and ongoing outage-capex program, not original construction capex. Fixed and variable O&M are technology-default estimates for large black-coal subcritical plant without CCS from GHD/AEMO 2025; annual fixed opex is calculated as 685 MW × AUD28,000/MW-year. Asset life is calculated from 1985 commissioning to scheduled closure by end-2033; Nexa notes AEMO's generic technical-life assumption was 50 years and the original expected closure was 2035. Heat rate is AEMO station-level heat-rate data for Bayswater, not DUID-specific. Emissions intensity is AGL FY22 sent-out intensity for AGL Macquarie Bayswater; CER defines its own facility intensity on production rather than sent-out basis, and later CER/third-party values may differ.\"},\"sources\":[{\"field_name\":\"capex_total_aud\",\"value_text\":\"Estimated BW04 allocation of >AUD200m Bayswater upgrade/ongoing outage-capex program; one quarter of station program = about AUD50m.\",\"value_numeric\":50000000,\"unit\":\"AUD\",\"source_url\":\"https://www.agl.com.au/about-agl/news-centre/2018/february/bayswater-power-station-upgrade-secures-additional-energy-supply-for-nsw?zcf97o=vlx3ap\",\"source_title\":\"Bayswater Power Station upgrade secures additional energy supply for NSW\",\"publisher\":\"AGL Energy\",\"published_date\":\"2018-02-28\",\"confidence\":\"medium\",\"raw_excerpt\":\"AGL will spend more than $200 million and create 90 jobs during work to upgrade and maintain the coal-fired Bayswater Power Station... Subject to approvals, the upgrade works are expected to commence by February 2019 and span four years... includes ongoing outage capital expenditure to maintain reliability.\",\"ai_summary\":\"AGL reported a >AUD200m station-level turbine upgrade and maintenance/outage capital program. The BW04 value is estimated by allocating one quarter of this four-unit station program to Unit 4.\"},{\"field_name\":\"capex_year\",\"value_text\":\"Program announced in 2018; works expected from February 2019 over four years, fully operational by 2022.\",\"value_numeric\":2018,\"unit\":\"year\",\"source_url\":\"https://www.agl.com.au/about-agl/news-centre/2018/february/bayswater-power-station-upgrade-secures-additional-energy-supply-for-nsw?zcf97o=vlx3ap\",\"source_title\":\"Bayswater Power Station upgrade secures additional energy supply for NSW\",\"publisher\":\"AGL Energy\",\"published_date\":\"2018-02-28\",\"confidence\":\"high\",\"raw_excerpt\":\"Published on 28 Feb, 2018... Subject to approvals, the upgrade works are expected to commence by February 2019 and span four years... all Bayswater’s upgraded turbines are fully operational by 2022.\",\"ai_summary\":\"The relevant capex program was announced in 2018 and planned across 2019-2022.\"},{\"field_name\":\"capex_scope\",\"value_text\":\"Turbine replacement/modern turbine technology plus ongoing outage capex to add 100 MW capacity without extra coal use or emissions.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.agl.com.au/about-agl/news-centre/2018/february/bayswater-power-station-upgrade-secures-additional-energy-supply-for-nsw?zcf97o=vlx3ap\",\"source_title\":\"Bayswater Power Station upgrade secures additional energy supply for NSW\",\"publisher\":\"AGL Energy\",\"published_date\":\"2018-02-28\",\"confidence\":\"high\",\"raw_excerpt\":\"By replacing the original turbines with modern turbine technology, Bayswater will have an additional 100 MW capacity... without the need for additional coal use... AGL has... contracted Toshiba as the principal contractor for the project.\",\"ai_summary\":\"The capex scope was turbine efficiency/capacity upgrade and reliability maintenance rather than original construction.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"AUD63m distributed control system project for Bayswater, installation during planned outages from September 2017 until late 2019.\",\"value_numeric\":63000000,\"unit\":\"AUD\",\"source_url\":\"https://www.agl.com.au/about-agl/news-centre/2016/march/63-million-control-system-project-for-agl-macquarie\",\"source_title\":\"$63 million control system project for AGL Macquarie\",\"publisher\":\"AGL Energy\",\"published_date\":\"2016-03-30\",\"confidence\":\"high\",\"raw_excerpt\":\"AGL Energy Limited... approved a $63 million project to install a Distributed Control System (DCS) at AGL Macquarie’s Bayswater power station... Installation... expected to start in September 2017... until late 2019.\",\"ai_summary\":\"AGL reported a major controls/refurbishment investment at Bayswater before the turbine-upgrade program.\"},{\"field_name\":\"fixed_opex_per_mw_year_aud\",\"value_text\":\"Large black coal sub-critical without CCS fixed O&M cost estimate: AUD28,000/MW net.\",\"value_numeric\":28000,\"unit\":\"AUD/MW-year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/ghd-2025-energy-technology-retirement-cost-om-estimate-review.pdf?rev=e2644c247ff7443a93c5ab09349fe0d9&sc_lang=en\",\"source_title\":\"2025 Energy Technology Retirement Cost & O&M Estimate Review\",\"publisher\":\"GHD for AEMO\",\"published_date\":\"2025-07-31\",\"confidence\":\"medium\",\"raw_excerpt\":\"Table 4 O&M estimate – black coal sub-critical... Fixed O&M Cost $ / MW (Net)... Large w/out CCS 28,000... Based on preparation of a high-level bottom-up estimate.\",\"ai_summary\":\"No BW04 fixed O&M disclosure was found; AEMO/GHD technology estimate for large black-coal subcritical plant is used.\"},{\"field_name\":\"fixed_opex_annual_aud\",\"value_text\":\"Calculated from BW04 capacity 685 MW × AUD28,000/MW-year = AUD19.18m/year.\",\"value_numeric\":19180000,\"unit\":\"AUD/year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/ghd-2025-energy-technology-retirement-cost-om-estimate-review.pdf?rev=e2644c247ff7443a93c5ab09349fe0d9&sc_lang=en\",\"source_title\":\"2025 Energy Technology Retirement Cost & O&M Estimate Review\",\"publisher\":\"GHD for AEMO\",\"published_date\":\"2025-07-31\",\"confidence\":\"medium\",\"raw_excerpt\":\"Fixed O&M Cost $ / MW (Net)... Large w/out CCS 28,000... Variable O&M Cost $ / MWh (Net) ... Large w/out CCS 8.\",\"ai_summary\":\"Annual fixed O&M is derived by applying the AEMO/GHD large black-coal subcritical fixed O&M estimate to the user-provided 685 MW capacity for BW04.\"},{\"field_name\":\"variable_opex_per_mwh_aud\",\"value_text\":\"Large black coal sub-critical without CCS variable O&M cost estimate: AUD8/MWh net.\",\"value_numeric\":8,\"unit\":\"AUD/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/ghd-2025-energy-technology-retirement-cost-om-estimate-review.pdf?rev=e2644c247ff7443a93c5ab09349fe0d9&sc_lang=en\",\"source_title\":\"2025 Energy Technology Retirement Cost & O&M Estimate Review\",\"publisher\":\"GHD for AEMO\",\"published_date\":\"2025-07-31\",\"confidence\":\"medium\",\"raw_excerpt\":\"Table 4 O&M estimate – black coal sub-critical... Variable O&M Cost $ / MWh (Net)... Large w/out CCS 8... Based on preparation of a high-level bottom-up estimate.\",\"ai_summary\":\"No BW04 variable O&M disclosure was found; AEMO/GHD technology estimate for large black-coal subcritical plant is used.\"},{\"field_name\":\"fuel_contract_notes\",\"value_text\":\"Production-cost-linked coal supply for Bayswater/Liddell to 2028; stockpile provided security of supply.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/media-centre/2022/220819-fy22-results-presentation.pdf\",\"source_title\":\"AGL Energy FY22 Full-Year Results Presentation\",\"publisher\":\"AGL Energy\",\"published_date\":\"2022-08-19\",\"confidence\":\"high\",\"raw_excerpt\":\"For Bayswater and Liddell, our reprofiled supply contract has provided consistent production cost-linked coal supply... Optimised Bayswater and Liddell supply contract on production cost-plus terms to 2028... Coal stockpile at Bayswater and Liddell providing security of supply (2m tonnes).\",\"ai_summary\":\"AGL publicly described Bayswater's coal supply as production-cost-linked/cost-plus through 2028, with stockpile support; no AUD/GJ price was disclosed.\"},{\"field_name\":\"fuel_cost_per_gj_aud\",\"value_text\":\"No public Bayswater AUD/GJ price found; AEMO/ACIL Allen model generator-specific coal prices considering contract positions, mine costs, export exposure and freight/handling costs.\",\"value_numeric\":null,\"unit\":\"AUD/GJ\",\"source_url\":\"https://aemo.com.au/-/media/files/major-publications/isp/2025/acil-allen-2024-fuel-price-forecast-report.pdf\",\"source_title\":\"Gas, liquid fuel, coal and renewable gas projections - Final report\",\"publisher\":\"ACIL Allen for AEMO\",\"published_date\":\"2025-07-31\",\"confidence\":\"medium\",\"raw_excerpt\":\"ACIL Allen maintains individual coal price projections for all incumbent coal generators in the NEM... takes into account mining costs, unique mine operational processes... export price, and freighting/handling costs... NSW black coal generators largely with export exposure.\",\"ai_summary\":\"AEMO's fuel-price consultant models coal costs at generator level but the accessible report did not provide a specific Bayswater AUD/GJ figure.\"},{\"field_name\":\"heat_rate_gj_per_mwh\",\"value_text\":\"AEMO heat-rate data search result lists Bayswater static heat rate 9.45 GJ/MWh.\",\"value_numeric\":9.45,\"unit\":\"GJ/MWh\",\"source_url\":\"https://wa.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf?la=en\",\"source_title\":\"AEMO Heat Rate Data\",\"publisher\":\"AEMO\",\"published_date\":\"2025\",\"confidence\":\"medium\",\"raw_excerpt\":\"Generator | Static Heat rate ... Bayswater | 9.45 ...\",\"ai_summary\":\"Station-level AEMO heat-rate data is used because no BW04-specific public heat rate was found.\"},{\"field_name\":\"efficiency_pct\",\"value_text\":\"Calculated as 3.6 ÷ 9.45 GJ/MWh = 38.1%.\",\"value_numeric\":38.1,\"unit\":\"%\",\"source_url\":\"https://wa.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf?la=en\",\"source_title\":\"AEMO Heat Rate Data\",\"publisher\":\"AEMO\",\"published_date\":\"2025\",\"confidence\":\"medium\",\"raw_excerpt\":\"Generator | Static Heat rate ... Bayswater | 9.45 ...\",\"ai_summary\":\"Thermal efficiency is derived from the AEMO station heat-rate assumption using electricity output energy of 3.6 GJ/MWh.\"},{\"field_name\":\"emissions_intensity_tco2_mwh\",\"value_text\":\"AGL Macquarie - Bayswater FY22 carbon intensity: 0.95 tCO2e/MWh, sent-out basis.\",\"value_numeric\":0.95,\"unit\":\"tCO2e/MWh\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/media-centre/2022/220819-fy22-results-presentation.pdf\",\"source_title\":\"AGL Energy FY22 Full-Year Results Presentation\",\"publisher\":\"AGL Energy\",\"published_date\":\"2022-08-19\",\"confidence\":\"high\",\"raw_excerpt\":\"Asset... AGL Macquarie - Bayswater NSW Black coal Owned 2,690 0.95 FY22 sent out generation (GWh) 14,000.\",\"ai_summary\":\"AGL disclosed Bayswater's FY22 sent-out emissions intensity as 0.95 tCO2e/MWh.\"},{\"field_name\":\"emissions_intensity_definition\",\"value_text\":\"CER facility emissions intensity is reported scope 1 emissions divided by reported electricity production, while sent-out measures such as AEMO's can be higher.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://cer.gov.au/markets/reports-and-data/nger-reporting-data-and-registers/electricity-sector-emissions-and-generation-data-2023-24\",\"source_title\":\"Electricity sector emissions and generation data 2023–24\",\"publisher\":\"Clean Energy Regulator\",\"published_date\":\"2025-02-28\",\"confidence\":\"high\",\"raw_excerpt\":\"Emissions intensity data is defined as reported scope 1 emissions divided by reported electricity production... Emissions intensities elsewhere are more typically measured (including by AEMO) based on electricity sent out to the grid, which results in a higher emissions intensity.\",\"ai_summary\":\"This source explains why AGL/AEMO sent-out emissions intensity may differ from CER production-basis facility intensity.\"},{\"field_name\":\"asset_life_years\",\"value_text\":\"Calculated life to scheduled closure: 1985 commissioning to closure by end-2033 = about 48 years.\",\"value_numeric\":48,\"unit\":\"years\",\"source_url\":\"https://www.agl.com.au/about-agl/operations/agl-in-the-hunter\",\"source_title\":\"AGL in the Hunter Region\",\"publisher\":\"AGL Energy\",\"published_date\":null,\"confidence\":\"high\",\"raw_excerpt\":\"Commissioned in 1985, Bayswater is a coal-fired power station with a capacity of 2,715 megawatts... Bayswater is scheduled to close by 2033... scheduled to close by the end of 2033.\",\"ai_summary\":\"AGL states Bayswater was commissioned in 1985 and is scheduled to close by end-2033; this implies about a 48-year operating life.\"},{\"field_name\":\"asset_life_years\",\"value_text\":\"Originally expected to close in 2035, in line with AEMO's generic 50-year technical life; AGL brought forward closure to between 2030 and 2033.\",\"value_numeric\":50,\"unit\":\"years\",\"source_url\":\"https://nexaadvisory.com.au/web/wp-content/uploads/2025/08/Nexa-Advisory-Bayswater-Power-Station-case-study.pdf\",\"source_title\":\"Coal Performance in the National Electricity Market: Case Study 4 – Bayswater Power Station\",\"publisher\":\"Nexa Advisory\",\"published_date\":\"2025-08\",\"confidence\":\"medium\",\"raw_excerpt\":\"Commissioned in 1985... nameplate capacity of 2,715 MW across four generating units. Originally expected to close in 2035, in line with the generic 50-year technical life assumed by AEMO, AGL announced in 2022 that it would bring forward the closure to between 2030 and 2033.\",\"ai_summary\":\"This supports a 50-year technical-life benchmark but also confirms Bayswater's announced earlier retirement window.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"Bayswater scheduled to close by end-2033; site to be transformed into Hunter Energy Hub.\",\"value_numeric\":2033,\"unit\":\"year\",\"source_url\":\"https://www.agl.com.au/about-agl/operations/agl-in-the-hunter\",\"source_title\":\"AGL in the Hunter Region\",\"publisher\":\"AGL Energy\",\"published_date\":null,\"confidence\":\"high\",\"raw_excerpt\":\"Bayswater is scheduled to close by 2033 in line with our Climate Transition Action Plan... This coal-fired power station is scheduled to close by the end of 2033... transforming the Liddell and Bayswater site into the Hunter Energy Hub.\",\"ai_summary\":\"AGL's current public operations page confirms the latest scheduled closure date and future site transition plan.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"AGL will spend more than AUD130m and take one of four units offline for planned maintenance in September 2025 on a four-year cycle; maintenance costs and outages are increasing with age.\",\"value_numeric\":130000000,\"unit\":\"AUD\",\"source_url\":\"https://www.abc.net.au/news/2025-06-13/bayswater-coal-fired-power-station-at-40-years/105403800\",\"source_title\":\"Bayswater Power Station turns 40 as ageing infrastructure drives up energy bills\",\"publisher\":\"ABC News\",\"published_date\":\"2025-06-13\",\"confidence\":\"medium\",\"raw_excerpt\":\"As the 2033 closure date looms, maintenance costs continue to rise and planned and unplanned outages increase at Bayswater. AGL will spend more than $130 million and switch off one of four units for planned maintenance at Bayswater in September, which it does on a four-year cycle.\",\"ai_summary\":\"A 2025 report indicates continuing major maintenance spending and age-related reliability issues.\"},{\"field_name\":\"generator_identity\",\"value_text\":\"Bayswater commissioned in 1985; capacity 2,715 MW; four units; BW04 is one of the 685 MW units.\",\"value_numeric\":685,\"unit\":\"MW\",\"source_url\":\"https://www.agl.com.au/about-agl/operations/agl-in-the-hunter\",\"source_title\":\"AGL in the Hunter Region\",\"publisher\":\"AGL Energy\",\"published_date\":null,\"confidence\":\"high\",\"raw_excerpt\":\"Commissioned in 1985, Bayswater is a coal-fired power station with a capacity of 2,715 megawatts... Four evaporative cooling towers... Bayswater produces around 15,000 gigawatt hours of electricity a year.\",\"ai_summary\":\"AGL confirms station-level capacity and commissioning. The user-provided DUID BW04 capacity is consistent with the 2,715 MW station total comprising one 660 MW and three 685 MW units.\"}],\"warnings\":[\"Original 1980s construction capex for Bayswater/BW04 was not found in accessible official or reputable sources; capex_total_aud is therefore an estimated allocation of a reported 2018 station-level upgrade/maintenance capex program, not construction cost.\",\"Fixed O&M and variable O&M are AEMO/GHD technology-default estimates for large black-coal subcritical plant, not reported AGL/BW04 actual costs.\",\"Fuel cost in AUD/GJ was not populated because AGL discloses contract structure but not price; AEMO/ACIL Allen generator-specific fuel-price work was identified but accessible text did not provide a Bayswater value.\",\"Heat rate is station-level AEMO data; no BW04-specific heat-rate curve or unit heat rate was found.\",\"Emissions intensity uses AGL FY22 sent-out figure; CER facility data uses a different production-basis definition, so values may differ across datasets.\",\"Major maintenance/refurbishment notes are station-level and may not all apply specifically to BW04.\"]}",
"raw_api": {
"id": "resp_011e4ad5dfaf1467006a20b067cbc88197b6e38396bf9652fa",
"object": "response",
"created_at": 1780527207,
"status": "completed",
"background": false,
"billing": {
"payer": "developer"
},
"completed_at": 1780527316,
"error": null,
"frequency_penalty": 0,
"incomplete_details": null,
"instructions": "You are a researcher of Australian NEM generator economics. You MUST use web search to find current, source-backed information before answering. Prefer official owner reports, AEMO documents, government sources, project finance announcements, annual reports, and investor presentations. Return only valid JSON matching the schema.",
"max_output_tokens": null,
"max_tool_calls": null,
"model": "gpt-5.5-2026-04-23",
"moderation": null,
"output": [
{
"id": "ws_011e4ad5dfaf1467006a20b068ca308197ab792ca1a14bc61a",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"Bayswater Power Station construction cost 4 x 660 MW commissioned cost",
"Bayswater power station AGL annual report closure 2035 emissions intensity heat rate",
"AEMO generator information Bayswater BW04 heat rate emissions intensity",
"AGL Bayswater coal supply contract Macquarie Generation fuel cost"
],
"query": "Bayswater Power Station construction cost 4 x 660 MW commissioned cost"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b06c3f0c81978a9ce36444c87c0b",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b06c4c208197bf2cafbc68307644",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"Bayswater Power Station construction cost $ 1985 Macquarie Generation",
"Bayswater Power Station environmental assessment upgrade construction cost 2018 AGL",
"Bayswater power station upgrade EPBC 2018 100 MW cost",
"Bayswater Power Station 40 years construction commenced commissioned 1985 AGL"
],
"query": "Bayswater Power Station construction cost $ 1985 Macquarie Generation"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b072387c81979ade1312593cd69d",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b07253ac8197a0fe99d77aa5e173",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"AEMO 2024 IASR coal fixed O&M variable O&M black coal subcritical AUD MW year MWh",
"AEMO 2025 inputs assumptions scenarios report coal fixed operating maintenance variable opex black coal",
"Gencost 2023-24 black coal fixed O&M variable O&M heat rate emissions intensity asset life"
],
"query": "AEMO 2024 IASR coal fixed O&M variable O&M black coal subcritical AUD MW year MWh"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b0774500819795d8b4570677e083",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b07761ec8197a05859694e7af8a5",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"AEMO 2025 IASR coal price NSW black coal $/GJ Bayswater",
"ACIL Allen 2024 coal price projections NSW black coal AEMO 2025 IASR $/GJ",
"Bayswater long-dated production cost linked coal supply contract AGL presentation 2022"
],
"query": "AEMO 2025 IASR coal price NSW black coal $/GJ Bayswater"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b07fd02c8197a33a16d8a1514ced",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b07fe2388197a7939723f130a701",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"Clean Energy Regulator Bayswater Power Station emissions intensity tCO2-e MWh 2022 2023",
"Greenhouse energy information designated generation facility Bayswater Power Station emissions intensity",
"Bayswater Power Station NGER emissions intensity tCO2-e/MWh"
],
"query": "Clean Energy Regulator Bayswater Power Station emissions intensity tCO2-e MWh 2022 2023"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b088bbb88197b0528cc1b77a34dd",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b088cda881978b62c50583944295",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "open_page",
"url": "https://cer.gov.au/markets/reports-and-data/nger-reporting-data-and-registers/electricity-sector-emissions-and-generation-data-2023-24"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b08a42bc819792fde95c9a59e790",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b08a57b481979af9047149cd8fdd",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "open_page",
"url": "https://wa.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf?la=en"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b08b97d48197baa2604897ae116a",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b08bc0388197b8eeda950b7241fd",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "open_page"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b08d0a3c8197aedb6adc2316fd04",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b08dfd00819780cf14721f866965",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "open_page",
"url": "https://www.2024datacentre.agl.com.au/environment/greenhouse-energy/operational-greenhouse-gas-footprint-material-sites-and-fuels"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b090a9e08197923a99892684b72a",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b090fc208197b2799a45df4c09a5",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "open_page"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b09233748197857b660f81a3b87d",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b0985d2c8197b805b264f7e28fb4",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "open_page",
"url": "https://www.agl.com.au/about-agl/how-we-source-energy/thermal-energy/agl-macquarie"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b09b6e2881979c5c2c9246e73ae0",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_011e4ad5dfaf1467006a20b09bd3ac81978f65f4a80a084ce6",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"AEMO NEM registration BW04 Bayswater Unit 4 capacity 685",
"BW04 Bayswater DUID registered capacity AEMO 685 MW",
"NEM Registration and Exemption List BW04 Bayswater"
],
"query": "AEMO NEM registration BW04 Bayswater Unit 4 capacity 685"
}
},
{
"id": "rs_011e4ad5dfaf1467006a20b0a054e88197be7d306902340dcb",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "msg_011e4ad5dfaf1467006a20b0a8f0888197846eff92b01767fa",
"type": "message",
"status": "completed",
"content": [
{
"type": "output_text",
"annotations": [],
"logprobs": [],
"text": "{\"generator_identity\":{\"site_name\":\"Bayswater\",\"duid\":\"BW04\",\"owner\":\"AGL Macquarie Pty Limited\",\"region\":\"NSW1\",\"technology_type\":\"Turbine - Steam Sub Critical\",\"fuel_type\":\"Fossil - Black Coal\"},\"financial_profile\":{\"generator_type_normalised\":\"black_coal\",\"capex_total_aud\":50000000,\"capex_year\":2018,\"capex_basis\":\"estimated\",\"capex_per_mw_aud\":72993,\"capex_per_mwh_aud\":null,\"fixed_opex_annual_aud\":19180000,\"fixed_opex_per_mw_year_aud\":28000,\"variable_opex_per_mwh_aud\":8,\"fuel_cost_per_gj_aud\":null,\"fuel_contract_notes\":\"AGL disclosed Bayswater/Liddell coal supply was reprofiled on production-cost-linked terms to 2028, supported by coal stockpiles; no public generator-specific AUD/GJ fuel price was found. AEMO/ACIL Allen model generator-specific NSW black-coal prices using contract positions, mining costs and export exposure, but public report text refers to workbook/detail rather than giving a Bayswater value in the accessible source.\",\"heat_rate_gj_per_mwh\":9.45,\"efficiency_pct\":38.1,\"emissions_intensity_tco2_mwh\":0.95,\"asset_life_years\":48,\"discount_rate_pct\":null,\"source_confidence\":\"medium\",\"data_status\":\"partially_verified\",\"notes\":\"Bayswater Unit 4 (BW04) is one of four units at Bayswater. Public sources provide station-level rather than BW04-specific economics. Original 1980s construction cost was not found in accessible official sources. The capex value shown is an estimated one-quarter allocation of AGL's reported >AUD200m 2018 Bayswater turbine upgrade and ongoing outage-capex program, not original construction capex. Fixed and variable O&M are technology-default estimates for large black-coal subcritical plant without CCS from GHD/AEMO 2025; annual fixed opex is calculated as 685 MW × AUD28,000/MW-year. Asset life is calculated from 1985 commissioning to scheduled closure by end-2033; Nexa notes AEMO's generic technical-life assumption was 50 years and the original expected closure was 2035. Heat rate is AEMO station-level heat-rate data for Bayswater, not DUID-specific. Emissions intensity is AGL FY22 sent-out intensity for AGL Macquarie Bayswater; CER defines its own facility intensity on production rather than sent-out basis, and later CER/third-party values may differ.\"},\"sources\":[{\"field_name\":\"capex_total_aud\",\"value_text\":\"Estimated BW04 allocation of >AUD200m Bayswater upgrade/ongoing outage-capex program; one quarter of station program = about AUD50m.\",\"value_numeric\":50000000,\"unit\":\"AUD\",\"source_url\":\"https://www.agl.com.au/about-agl/news-centre/2018/february/bayswater-power-station-upgrade-secures-additional-energy-supply-for-nsw?zcf97o=vlx3ap\",\"source_title\":\"Bayswater Power Station upgrade secures additional energy supply for NSW\",\"publisher\":\"AGL Energy\",\"published_date\":\"2018-02-28\",\"confidence\":\"medium\",\"raw_excerpt\":\"AGL will spend more than $200 million and create 90 jobs during work to upgrade and maintain the coal-fired Bayswater Power Station... Subject to approvals, the upgrade works are expected to commence by February 2019 and span four years... includes ongoing outage capital expenditure to maintain reliability.\",\"ai_summary\":\"AGL reported a >AUD200m station-level turbine upgrade and maintenance/outage capital program. The BW04 value is estimated by allocating one quarter of this four-unit station program to Unit 4.\"},{\"field_name\":\"capex_year\",\"value_text\":\"Program announced in 2018; works expected from February 2019 over four years, fully operational by 2022.\",\"value_numeric\":2018,\"unit\":\"year\",\"source_url\":\"https://www.agl.com.au/about-agl/news-centre/2018/february/bayswater-power-station-upgrade-secures-additional-energy-supply-for-nsw?zcf97o=vlx3ap\",\"source_title\":\"Bayswater Power Station upgrade secures additional energy supply for NSW\",\"publisher\":\"AGL Energy\",\"published_date\":\"2018-02-28\",\"confidence\":\"high\",\"raw_excerpt\":\"Published on 28 Feb, 2018... Subject to approvals, the upgrade works are expected to commence by February 2019 and span four years... all Bayswater’s upgraded turbines are fully operational by 2022.\",\"ai_summary\":\"The relevant capex program was announced in 2018 and planned across 2019-2022.\"},{\"field_name\":\"capex_scope\",\"value_text\":\"Turbine replacement/modern turbine technology plus ongoing outage capex to add 100 MW capacity without extra coal use or emissions.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.agl.com.au/about-agl/news-centre/2018/february/bayswater-power-station-upgrade-secures-additional-energy-supply-for-nsw?zcf97o=vlx3ap\",\"source_title\":\"Bayswater Power Station upgrade secures additional energy supply for NSW\",\"publisher\":\"AGL Energy\",\"published_date\":\"2018-02-28\",\"confidence\":\"high\",\"raw_excerpt\":\"By replacing the original turbines with modern turbine technology, Bayswater will have an additional 100 MW capacity... without the need for additional coal use... AGL has... contracted Toshiba as the principal contractor for the project.\",\"ai_summary\":\"The capex scope was turbine efficiency/capacity upgrade and reliability maintenance rather than original construction.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"AUD63m distributed control system project for Bayswater, installation during planned outages from September 2017 until late 2019.\",\"value_numeric\":63000000,\"unit\":\"AUD\",\"source_url\":\"https://www.agl.com.au/about-agl/news-centre/2016/march/63-million-control-system-project-for-agl-macquarie\",\"source_title\":\"$63 million control system project for AGL Macquarie\",\"publisher\":\"AGL Energy\",\"published_date\":\"2016-03-30\",\"confidence\":\"high\",\"raw_excerpt\":\"AGL Energy Limited... approved a $63 million project to install a Distributed Control System (DCS) at AGL Macquarie’s Bayswater power station... Installation... expected to start in September 2017... until late 2019.\",\"ai_summary\":\"AGL reported a major controls/refurbishment investment at Bayswater before the turbine-upgrade program.\"},{\"field_name\":\"fixed_opex_per_mw_year_aud\",\"value_text\":\"Large black coal sub-critical without CCS fixed O&M cost estimate: AUD28,000/MW net.\",\"value_numeric\":28000,\"unit\":\"AUD/MW-year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/ghd-2025-energy-technology-retirement-cost-om-estimate-review.pdf?rev=e2644c247ff7443a93c5ab09349fe0d9&sc_lang=en\",\"source_title\":\"2025 Energy Technology Retirement Cost & O&M Estimate Review\",\"publisher\":\"GHD for AEMO\",\"published_date\":\"2025-07-31\",\"confidence\":\"medium\",\"raw_excerpt\":\"Table 4 O&M estimate – black coal sub-critical... Fixed O&M Cost $ / MW (Net)... Large w/out CCS 28,000... Based on preparation of a high-level bottom-up estimate.\",\"ai_summary\":\"No BW04 fixed O&M disclosure was found; AEMO/GHD technology estimate for large black-coal subcritical plant is used.\"},{\"field_name\":\"fixed_opex_annual_aud\",\"value_text\":\"Calculated from BW04 capacity 685 MW × AUD28,000/MW-year = AUD19.18m/year.\",\"value_numeric\":19180000,\"unit\":\"AUD/year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/ghd-2025-energy-technology-retirement-cost-om-estimate-review.pdf?rev=e2644c247ff7443a93c5ab09349fe0d9&sc_lang=en\",\"source_title\":\"2025 Energy Technology Retirement Cost & O&M Estimate Review\",\"publisher\":\"GHD for AEMO\",\"published_date\":\"2025-07-31\",\"confidence\":\"medium\",\"raw_excerpt\":\"Fixed O&M Cost $ / MW (Net)... Large w/out CCS 28,000... Variable O&M Cost $ / MWh (Net) ... Large w/out CCS 8.\",\"ai_summary\":\"Annual fixed O&M is derived by applying the AEMO/GHD large black-coal subcritical fixed O&M estimate to the user-provided 685 MW capacity for BW04.\"},{\"field_name\":\"variable_opex_per_mwh_aud\",\"value_text\":\"Large black coal sub-critical without CCS variable O&M cost estimate: AUD8/MWh net.\",\"value_numeric\":8,\"unit\":\"AUD/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/ghd-2025-energy-technology-retirement-cost-om-estimate-review.pdf?rev=e2644c247ff7443a93c5ab09349fe0d9&sc_lang=en\",\"source_title\":\"2025 Energy Technology Retirement Cost & O&M Estimate Review\",\"publisher\":\"GHD for AEMO\",\"published_date\":\"2025-07-31\",\"confidence\":\"medium\",\"raw_excerpt\":\"Table 4 O&M estimate – black coal sub-critical... Variable O&M Cost $ / MWh (Net)... Large w/out CCS 8... Based on preparation of a high-level bottom-up estimate.\",\"ai_summary\":\"No BW04 variable O&M disclosure was found; AEMO/GHD technology estimate for large black-coal subcritical plant is used.\"},{\"field_name\":\"fuel_contract_notes\",\"value_text\":\"Production-cost-linked coal supply for Bayswater/Liddell to 2028; stockpile provided security of supply.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/media-centre/2022/220819-fy22-results-presentation.pdf\",\"source_title\":\"AGL Energy FY22 Full-Year Results Presentation\",\"publisher\":\"AGL Energy\",\"published_date\":\"2022-08-19\",\"confidence\":\"high\",\"raw_excerpt\":\"For Bayswater and Liddell, our reprofiled supply contract has provided consistent production cost-linked coal supply... Optimised Bayswater and Liddell supply contract on production cost-plus terms to 2028... Coal stockpile at Bayswater and Liddell providing security of supply (2m tonnes).\",\"ai_summary\":\"AGL publicly described Bayswater's coal supply as production-cost-linked/cost-plus through 2028, with stockpile support; no AUD/GJ price was disclosed.\"},{\"field_name\":\"fuel_cost_per_gj_aud\",\"value_text\":\"No public Bayswater AUD/GJ price found; AEMO/ACIL Allen model generator-specific coal prices considering contract positions, mine costs, export exposure and freight/handling costs.\",\"value_numeric\":null,\"unit\":\"AUD/GJ\",\"source_url\":\"https://aemo.com.au/-/media/files/major-publications/isp/2025/acil-allen-2024-fuel-price-forecast-report.pdf\",\"source_title\":\"Gas, liquid fuel, coal and renewable gas projections - Final report\",\"publisher\":\"ACIL Allen for AEMO\",\"published_date\":\"2025-07-31\",\"confidence\":\"medium\",\"raw_excerpt\":\"ACIL Allen maintains individual coal price projections for all incumbent coal generators in the NEM... takes into account mining costs, unique mine operational processes... export price, and freighting/handling costs... NSW black coal generators largely with export exposure.\",\"ai_summary\":\"AEMO's fuel-price consultant models coal costs at generator level but the accessible report did not provide a specific Bayswater AUD/GJ figure.\"},{\"field_name\":\"heat_rate_gj_per_mwh\",\"value_text\":\"AEMO heat-rate data search result lists Bayswater static heat rate 9.45 GJ/MWh.\",\"value_numeric\":9.45,\"unit\":\"GJ/MWh\",\"source_url\":\"https://wa.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf?la=en\",\"source_title\":\"AEMO Heat Rate Data\",\"publisher\":\"AEMO\",\"published_date\":\"2025\",\"confidence\":\"medium\",\"raw_excerpt\":\"Generator | Static Heat rate ... Bayswater | 9.45 ...\",\"ai_summary\":\"Station-level AEMO heat-rate data is used because no BW04-specific public heat rate was found.\"},{\"field_name\":\"efficiency_pct\",\"value_text\":\"Calculated as 3.6 ÷ 9.45 GJ/MWh = 38.1%.\",\"value_numeric\":38.1,\"unit\":\"%\",\"source_url\":\"https://wa.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf?la=en\",\"source_title\":\"AEMO Heat Rate Data\",\"publisher\":\"AEMO\",\"published_date\":\"2025\",\"confidence\":\"medium\",\"raw_excerpt\":\"Generator | Static Heat rate ... Bayswater | 9.45 ...\",\"ai_summary\":\"Thermal efficiency is derived from the AEMO station heat-rate assumption using electricity output energy of 3.6 GJ/MWh.\"},{\"field_name\":\"emissions_intensity_tco2_mwh\",\"value_text\":\"AGL Macquarie - Bayswater FY22 carbon intensity: 0.95 tCO2e/MWh, sent-out basis.\",\"value_numeric\":0.95,\"unit\":\"tCO2e/MWh\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/media-centre/2022/220819-fy22-results-presentation.pdf\",\"source_title\":\"AGL Energy FY22 Full-Year Results Presentation\",\"publisher\":\"AGL Energy\",\"published_date\":\"2022-08-19\",\"confidence\":\"high\",\"raw_excerpt\":\"Asset... AGL Macquarie - Bayswater NSW Black coal Owned 2,690 0.95 FY22 sent out generation (GWh) 14,000.\",\"ai_summary\":\"AGL disclosed Bayswater's FY22 sent-out emissions intensity as 0.95 tCO2e/MWh.\"},{\"field_name\":\"emissions_intensity_definition\",\"value_text\":\"CER facility emissions intensity is reported scope 1 emissions divided by reported electricity production, while sent-out measures such as AEMO's can be higher.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://cer.gov.au/markets/reports-and-data/nger-reporting-data-and-registers/electricity-sector-emissions-and-generation-data-2023-24\",\"source_title\":\"Electricity sector emissions and generation data 2023–24\",\"publisher\":\"Clean Energy Regulator\",\"published_date\":\"2025-02-28\",\"confidence\":\"high\",\"raw_excerpt\":\"Emissions intensity data is defined as reported scope 1 emissions divided by reported electricity production... Emissions intensities elsewhere are more typically measured (including by AEMO) based on electricity sent out to the grid, which results in a higher emissions intensity.\",\"ai_summary\":\"This source explains why AGL/AEMO sent-out emissions intensity may differ from CER production-basis facility intensity.\"},{\"field_name\":\"asset_life_years\",\"value_text\":\"Calculated life to scheduled closure: 1985 commissioning to closure by end-2033 = about 48 years.\",\"value_numeric\":48,\"unit\":\"years\",\"source_url\":\"https://www.agl.com.au/about-agl/operations/agl-in-the-hunter\",\"source_title\":\"AGL in the Hunter Region\",\"publisher\":\"AGL Energy\",\"published_date\":null,\"confidence\":\"high\",\"raw_excerpt\":\"Commissioned in 1985, Bayswater is a coal-fired power station with a capacity of 2,715 megawatts... Bayswater is scheduled to close by 2033... scheduled to close by the end of 2033.\",\"ai_summary\":\"AGL states Bayswater was commissioned in 1985 and is scheduled to close by end-2033; this implies about a 48-year operating life.\"},{\"field_name\":\"asset_life_years\",\"value_text\":\"Originally expected to close in 2035, in line with AEMO's generic 50-year technical life; AGL brought forward closure to between 2030 and 2033.\",\"value_numeric\":50,\"unit\":\"years\",\"source_url\":\"https://nexaadvisory.com.au/web/wp-content/uploads/2025/08/Nexa-Advisory-Bayswater-Power-Station-case-study.pdf\",\"source_title\":\"Coal Performance in the National Electricity Market: Case Study 4 – Bayswater Power Station\",\"publisher\":\"Nexa Advisory\",\"published_date\":\"2025-08\",\"confidence\":\"medium\",\"raw_excerpt\":\"Commissioned in 1985... nameplate capacity of 2,715 MW across four generating units. Originally expected to close in 2035, in line with the generic 50-year technical life assumed by AEMO, AGL announced in 2022 that it would bring forward the closure to between 2030 and 2033.\",\"ai_summary\":\"This supports a 50-year technical-life benchmark but also confirms Bayswater's announced earlier retirement window.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"Bayswater scheduled to close by end-2033; site to be transformed into Hunter Energy Hub.\",\"value_numeric\":2033,\"unit\":\"year\",\"source_url\":\"https://www.agl.com.au/about-agl/operations/agl-in-the-hunter\",\"source_title\":\"AGL in the Hunter Region\",\"publisher\":\"AGL Energy\",\"published_date\":null,\"confidence\":\"high\",\"raw_excerpt\":\"Bayswater is scheduled to close by 2033 in line with our Climate Transition Action Plan... This coal-fired power station is scheduled to close by the end of 2033... transforming the Liddell and Bayswater site into the Hunter Energy Hub.\",\"ai_summary\":\"AGL's current public operations page confirms the latest scheduled closure date and future site transition plan.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"AGL will spend more than AUD130m and take one of four units offline for planned maintenance in September 2025 on a four-year cycle; maintenance costs and outages are increasing with age.\",\"value_numeric\":130000000,\"unit\":\"AUD\",\"source_url\":\"https://www.abc.net.au/news/2025-06-13/bayswater-coal-fired-power-station-at-40-years/105403800\",\"source_title\":\"Bayswater Power Station turns 40 as ageing infrastructure drives up energy bills\",\"publisher\":\"ABC News\",\"published_date\":\"2025-06-13\",\"confidence\":\"medium\",\"raw_excerpt\":\"As the 2033 closure date looms, maintenance costs continue to rise and planned and unplanned outages increase at Bayswater. AGL will spend more than $130 million and switch off one of four units for planned maintenance at Bayswater in September, which it does on a four-year cycle.\",\"ai_summary\":\"A 2025 report indicates continuing major maintenance spending and age-related reliability issues.\"},{\"field_name\":\"generator_identity\",\"value_text\":\"Bayswater commissioned in 1985; capacity 2,715 MW; four units; BW04 is one of the 685 MW units.\",\"value_numeric\":685,\"unit\":\"MW\",\"source_url\":\"https://www.agl.com.au/about-agl/operations/agl-in-the-hunter\",\"source_title\":\"AGL in the Hunter Region\",\"publisher\":\"AGL Energy\",\"published_date\":null,\"confidence\":\"high\",\"raw_excerpt\":\"Commissioned in 1985, Bayswater is a coal-fired power station with a capacity of 2,715 megawatts... Four evaporative cooling towers... Bayswater produces around 15,000 gigawatt hours of electricity a year.\",\"ai_summary\":\"AGL confirms station-level capacity and commissioning. The user-provided DUID BW04 capacity is consistent with the 2,715 MW station total comprising one 660 MW and three 685 MW units.\"}],\"warnings\":[\"Original 1980s construction capex for Bayswater/BW04 was not found in accessible official or reputable sources; capex_total_aud is therefore an estimated allocation of a reported 2018 station-level upgrade/maintenance capex program, not construction cost.\",\"Fixed O&M and variable O&M are AEMO/GHD technology-default estimates for large black-coal subcritical plant, not reported AGL/BW04 actual costs.\",\"Fuel cost in AUD/GJ was not populated because AGL discloses contract structure but not price; AEMO/ACIL Allen generator-specific fuel-price work was identified but accessible text did not provide a Bayswater value.\",\"Heat rate is station-level AEMO data; no BW04-specific heat-rate curve or unit heat rate was found.\",\"Emissions intensity uses AGL FY22 sent-out figure; CER facility data uses a different production-basis definition, so values may differ across datasets.\",\"Major maintenance/refurbishment notes are station-level and may not all apply specifically to BW04.\"]}"
}
],
"phase": "final_answer",
"role": "assistant"
}
],
"parallel_tool_calls": true,
"presence_penalty": 0,
"previous_response_id": null,
"prompt_cache_key": null,
"prompt_cache_retention": "24h",
"reasoning": {
"context": "current_turn",
"effort": "medium",
"summary": null
},
"safety_identifier": null,
"service_tier": "default",
"store": true,
"temperature": 1,
"text": {
"format": {
"type": "json_schema",
"description": null,
"name": "generator_financial_extraction",
"schema": {
"type": "object",
"additionalProperties": false,
"properties": {
"generator_identity": {
"type": "object",
"additionalProperties": false,
"properties": {
"site_name": {
"type": "string"
},
"duid": {
"type": [
"string",
"null"
]
},
"owner": {
"type": [
"string",
"null"
]
},
"region": {
"type": [
"string",
"null"
]
},
"technology_type": {
"type": [
"string",
"null"
]
},
"fuel_type": {
"type": [
"string",
"null"
]
}
},
"required": [
"site_name",
"duid",
"owner",
"region",
"technology_type",
"fuel_type"
]
},
"financial_profile": {
"type": "object",
"additionalProperties": false,
"properties": {
"generator_type_normalised": {
"type": "string",
"enum": [
"ocgt",
"ccgt",
"black_coal",
"brown_coal",
"diesel",
"wind_onshore",
"wind_offshore",
"solar_fixed",
"solar_tracking",
"battery",
"hydro",
"pumped_hydro",
"biomass",
"waste_gas",
"hybrid",
"other"
]
},
"capex_total_aud": {
"type": [
"number",
"null"
]
},
"capex_year": {
"type": [
"number",
"null"
]
},
"capex_basis": {
"type": "string",
"enum": [
"reported",
"estimated",
"default",
"unknown"
]
},
"capex_per_mw_aud": {
"type": [
"number",
"null"
]
},
"capex_per_mwh_aud": {
"type": [
"number",
"null"
]
},
"fixed_opex_annual_aud": {
"type": [
"number",
"null"
]
},
"fixed_opex_per_mw_year_aud": {
"type": [
"number",
"null"
]
},
"variable_opex_per_mwh_aud": {
"type": [
"number",
"null"
]
},
"fuel_cost_per_gj_aud": {
"type": [
"number",
"null"
]
},
"fuel_contract_notes": {
"type": [
"string",
"null"
]
},
"heat_rate_gj_per_mwh": {
"type": [
"number",
"null"
]
},
"efficiency_pct": {
"type": [
"number",
"null"
]
},
"emissions_intensity_tco2_mwh": {
"type": [
"number",
"null"
]
},
"asset_life_years": {
"type": [
"number",
"null"
]
},
"discount_rate_pct": {
"type": [
"number",
"null"
]
},
"source_confidence": {
"type": "string",
"enum": [
"high",
"medium",
"low",
"unknown"
]
},
"data_status": {
"type": "string",
"enum": [
"ai_estimated",
"partially_verified",
"needs_review"
]
},
"notes": {
"type": [
"string",
"null"
]
}
},
"required": [
"generator_type_normalised",
"capex_total_aud",
"capex_year",
"capex_basis",
"capex_per_mw_aud",
"capex_per_mwh_aud",
"fixed_opex_annual_aud",
"fixed_opex_per_mw_year_aud",
"variable_opex_per_mwh_aud",
"fuel_cost_per_gj_aud",
"fuel_contract_notes",
"heat_rate_gj_per_mwh",
"efficiency_pct",
"emissions_intensity_tco2_mwh",
"asset_life_years",
"discount_rate_pct",
"source_confidence",
"data_status",
"notes"
]
},
"sources": {
"type": "array",
"items": {
"type": "object",
"additionalProperties": false,
"properties": {
"field_name": {
"type": "string"
},
"value_text": {
"type": [
"string",
"null"
]
},
"value_numeric": {
"type": [
"number",
"null"
]
},
"unit": {
"type": [
"string",
"null"
]
},
"source_url": {
"type": [
"string",
"null"
]
},
"source_title": {
"type": [
"string",
"null"
]
},
"publisher": {
"type": [
"string",
"null"
]
},
"published_date": {
"type": [
"string",
"null"
]
},
"confidence": {
"type": "string",
"enum": [
"high",
"medium",
"low"
]
},
"raw_excerpt": {
"type": [
"string",
"null"
]
},
"ai_summary": {
"type": [
"string",
"null"
]
}
},
"required": [
"field_name",
"value_text",
"value_numeric",
"unit",
"source_url",
"source_title",
"publisher",
"published_date",
"confidence",
"raw_excerpt",
"ai_summary"
]
}
},
"warnings": {
"type": "array",
"items": {
"type": "string"
}
}
},
"required": [
"generator_identity",
"financial_profile",
"sources",
"warnings"
]
},
"strict": true
},
"verbosity": "medium"
},
"tool_choice": "required",
"tools": [
{
"type": "web_search",
"return_token_budget": "default",
"search_context_size": "high",
"user_location": {
"type": "approximate",
"city": null,
"country": "AU",
"region": null,
"timezone": null
}
}
],
"top_logprobs": 0,
"top_p": 0.98,
"truncation": "disabled",
"usage": {
"input_tokens": 72212,
"input_tokens_details": {
"cached_tokens": 4608
},
"output_tokens": 6351,
"output_tokens_details": {
"reasoning_tokens": 1782
},
"total_tokens": 78563
},
"user": null,
"metadata": []
}
}