Dispatch target (cleared) vs availability — 5‑minute intervals. TAS1 regional price (RRP) on right axis.
03 Jun 2026 17:40 → 04 Jun 2026 17:40 AEST
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 | 0.9977 |
| 2025-07-01 | 0.9986 |
| Capex total (greenfield) |
$16.67M
Shown in table How this was derived Reference |
|---|---|
| Capex refurbishment |
—
|
| Capex / MW |
$416,667
Shown in table How this was derived Reference |
| Capex / MWh storage |
—
|
| Fixed OPEX (annual) |
$520.0k
Shown in table How this was derived Reference |
| Fixed OPEX / MW-yr |
$13,000
Shown in table How this was derived Reference |
| Variable OPEX / MWh |
$7.93
Shown in table How this was derived Reference |
| Fuel cost / GJ |
$14.51
Shown in table How this was derived Reference |
| Heat rate GJ/MWh |
12.04
Shown in table How this was derived Reference |
Confidence: medium · Status: ai estimated · Capex basis: estimated · AI checked 04 Jun 2026
Notes
Specific financial details for Bell Bay Three are not available in public domain or recent reports.
Bell Bay Three consists of three 40 MW Pratt & Whitney FT8 Twin Pac OCGT units. The reported 2006 capex was $50 million for the three-unit Bell Bay Three project, including purchase/installation of gas turbines and associated transmission upgrades; the value entered for BBTHREE1 is a one-third pro-rata allocation and is therefore marked estimated. O&M and heat-rate assumptions are from public modelling sources for Bell Bay Three/OCGT and are not confirmed as current owner budget values. Emissions intensity is taken from an older ACIL Tasman total CO2-e intensity for Bell Bay Three including fugitive emissions; using current NGA 2025 direct-combustion factor only and AEMO static heat rate would imply about 0.62 tCO2-e/MWh generated. Closure information is conflicting/uncertain: Nemstats reports expected closure 2025-07-02, while AEMO 2025-26 MLF documents still list BBTHREE1 as a Tasmanian generator for FY2025-26.
Bell Bay Three comprises three small aero-derivative OCGT units originally acquired from the United States and installed in 2005-06; the reported project cost was AUD 50 million for all three 38.75 MVA units including installation and associated transmission upgrades. The capex_total_aud shown here is a pro-rata single-DUID allocation for BBTHREE1, not a separately reported unit-level contract price. O&M, heat rate, efficiency, emissions intensity and asset life are technology-default estimates for small OCGT/small gas turbines from AEMO/Aurecon 2024 assumptions, not Bell Bay Three-specific operating data. Emissions intensity is derived as 10.489 GJ/MWh HHV heat rate multiplied by the Australian NGA 2025 pipeline natural gas Scope 1 factor of 51.53 kg CO2-e/GJ. AEMO/Nemstats lists BBTHREE1 as 40 MW and in service with an expected closure date of 2025-07-02, but the Tasmanian Economic Regulator 2024-25 review states the Tamar Valley OCGT units remain available at all times; treat closure status as needing review against the latest AEMO April 2026 generation-information workbook.
Bell Bay Three comprises three Pratt & Whitney FT8 Twin Pac OCGT units now reported within Tamar Valley Power Station's OCGT fleet. Hydro Tasmania reported AUD 50 million for acquisition and installation of three 35 MW gas turbines in FY2005/06; the capex_total_aud shown here is an allocated one-third estimate for DUID BBTHREE1, while capex_per_mw_aud preserves the reported package cost divided by the reported 105 MW scope. Hydro Tasmania now describes the three units as 3 x 40 MW; AEMO/Hydro historical sources describe the original scope as 3 x 35 MW / 105 MW. Fixed O&M, variable O&M, heat rate, efficiency and life are technology-default assumptions from Aurecon/AEMO 2024 small OCGT parameters because BBTHREE1-specific cost/performance values were not found. Emissions intensity is calculated from the default HHV heat rate at maximum operation of 10.489 GJ/MWh multiplied by the 2025 Australian NGA natural-gas stationary-combustion factor of 51.53 kg CO2-e/GJ. Closure/refurbishment notes: the FT8 fleet remains used as-needed; AETV reported Unit 103B was taken offline during 2017/18 and remains permanently in long-term in situ storage, and reported ongoing NOx issues and minimal near-term FT8 operation after a 2023 stack-testing non-compliance. This affects the Bell Bay Three fleet but not necessarily BBTHREE1 alone.
BBTHREE1 is one of the three Bell Bay Three / Tamar Valley FT8 OCGT units. Original project capex was reported for all three 38.75 MVA gas turbine units, not individually by DUID; the capex_total_aud and capex_per_mw_aud above allocate the reported $52.409m project cost equally across three 40 MW NEM units. Fixed and variable O&M are not generator-specific public values; defaults use Aurecon/AEMO 2024 small aero-derivative OCGT assumptions excluding fuel. AEMO provides a generator-specific static heat rate for Bell Bay Three of 12.04 GJ/MWh HHV. Emissions intensity is calculated as 12.04 GJ/MWh x 51.53 kg CO2-e/GJ for pipeline natural gas. Hydro material from 2016 says the FT8 units were second-hand when purchased and were then approaching end of life; however, Hydro’s current station page and 2023-24 AER show the FT8s remain part of the operating TVPS fleet, with Unit 103B in long-term in-situ storage. For BBTHREE1/Unit 101, 2023-24 AER notes FT8 NOx issues, management of FT8 operating hours, and expectation of minimal near-term FT8 operation after a November 2023 stack-testing non-compliance.
BBTHREE1 is one of the three 40 MW Pratt & Whitney FT8 Twin Pac OCGT units at Tamar Valley/Bell Bay Three. Generator-specific construction cost, fixed O&M, VOM, and current fuel prices were not publicly found. Capex is estimated by allocating the reported A$75m 2007 acquisition of the 105 MW Bell Bay peaking station/assets across three units; scope likely included site/assets and gas pipeline capacity agreements, not a greenfield construction EPC cost. Fixed O&M and VOM use AEMO/Aurecon 2024 small aero-derivative OCGT defaults, excluding fuel. Heat rate and efficiency use Mitsubishi Power published FT8 SWIFTPAC 60 50 Hz package values as a proxy for FT8 Twin Pac. Emissions intensity uses a public AEMO-attributed generator emissions factor dataset; ACIL Allen/AEMO emissions review confirms Bell Bay Three as a gas OCGT in the emissions factor set but the exact numeric value was not machine-readable from the PDF figures. Closure data is conflicting/stale: nemstats/AEMO-derived data lists BBTHREE1 in service with an expected closure date of 2025-07-02, while AEMO 2025-26 MLF tables still list BBTHREE1.