Colongra (CG1)

Gas Peakers · Snowy Hydro Ltd · Turbine - OCGT

Dispatch stats Financials
Operational AEMO: In Service NSW1 Fossil - Natural Gas Pipeline NEM data · 24 hours
181 MW
Registered nameplate capacity
24 hours revenue
$0
Capacity factor
0.0%
Revenue / MWh
—
Est. SRMC
$197.00/MWh

Energy flow

Dispatch target (cleared) vs availability — 5‑minute intervals. NSW1 regional price (RRP) on right axis.

Key information
Capacity
181 MW

AEMO status In Service
Project status Operational (AI)

AEMO/industry listings identify Colongra CG1 as an in-service OCGT asset; no primary source found in provided results to confirm turbine OEM/model.

Region NSW1
Coordinates —

MLF 0.9849
DUID CG1
Owner Snowy Hydro Ltd
Commissioned —
Expected closure 2070
Closure date —
Technology Turbine - OCGT
Fuel Fossil - Natural Gas Pipeline
Gas turbine OEM —
Turbine / engine model —
Stats window
12 Jun 2026 23:45 → 13 Jun 2026 23:45 AEST

Dispatch & revenue

12 Jun 2026 23:45 → 13 Jun 2026 23:45 AEST

Energy revenue (× MLF)
$0
FCAS revenue (× MLF)
$0
FCAS volume
— MWh
Dispatched
— MWh
Available
771.3 MWh
Curtailed
771.3 MWh
Curtailment
100.0%
of available
MLF used
0.9849
end of period

Revenue (× MLF)

Estimated $ per interval — energy (RRP) and FCAS (regional FCAS prices), both × MLF.

Methodology & assumptions

  • Dispatch & availability — AEMO Next Day Dispatch UNIT_SOLUTION (5‑minute intervals). Intervention intervals excluded.
  • Regional price — dispatch_price RRP matched by settlement time and NEM region (from generator registry).
  • Energy revenue (× MLF) — cleared MW × (5/60 h) × RRP × MLF.
  • FCAS revenue & volume — cleared FCAS MW from DISPATCHLOAD (raise/lower 6s, 60s, 5min, reg) × (5/60 h) × regional FCAS price × MLF. Volume is total FCAS enablement MWh across services.
  • Curtailment — estimated economic curtailment when availability exceeds dispatch target: max(0, availability − cleared) × (5/60) MWh.
  • Not settlement — estimates only. AEMO settlement applies DLF, rebids, constraints, and other factors not modelled here.
MLF history (AEMO daily)
Effective fromMLF
2024-07-01 0.9828
2025-07-01 0.9849

Financial overview

2026 real AUD. Monetary values are CPI-adjusted to 2026 real Australian dollars. Greenfield capex uses AEMO benchmarks when plant-specific cost is unknown.
Type
OCGT
Capacity
181 MW
Revenue (× MLF) (stats)
See dispatch stats link above
Est. SRMC
$197.00/MWh
Capex total (greenfield)
$786.16M

Shown in table
$786.16M (2026 real AUD)

Reported / source value
$500.00M (2009 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Contemporaneous source states Colongra cost $500 million and opened in December 2009.

Reference
DELTA ELECTRICITY annual report editorial (high confidence)
Source recorded 06 Jun 2026
Capex refurbishment
—
Capex / MW derived
$4,343,445

Shown in table
$4.34M (2026 real AUD)

Reported / source value
$2.76M (2009 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).
Fixed OPEX (annual)
$9.39M

Shown in table
$9.39M (2026 real AUD)

Reported / source value
$5.94M (2009 nominal)
Table total may differ if recalculated from $/MW × registered capacity after CPI adjustment.
Fixed OPEX / MW-yr
$51,887

Shown in table
$51.9k (2026 real AUD)

Reported / source value
$33.0k (2009 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
AEMO/Aurecon review provides benchmark fixed O&M for gas turbine options; used as proxy for OCGT-type plant where site-specific value not found.

Reference
2024 Energy Technology Cost and Parameters Review (medium confidence)
Source recorded 06 Jun 2026
Variable OPEX / MWh
$12.74

Shown in table
$12.74 (2026 real AUD)

Reported / source value
$8.10 (2009 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
AEMO/Aurecon review provides benchmark variable O&M for large GT/OCGT-type plant.

Reference
2024 Energy Technology Cost and Parameters Review (medium confidence)
Source recorded 06 Jun 2026
Fuel cost / GJ
$18.87

Shown in table
$18.87 (2026 real AUD)

Reported / source value
$12.00 (2009 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).
Heat rate GJ/MWh
9.77

Shown in table
$9.77 (2026 real AUD)

How this was derived
Used large GT / OCGT-type benchmark heat rate from AEMO/Aurecon review.

Reference
2024 Energy Technology Cost and Parameters Review (medium confidence)
Source recorded 06 Jun 2026

Confidence: medium · Status: ai estimated · Capex basis: reported · AI checked 06 Jun 2026

Notes
Colongra Power Station was commissioned in 2009 and acquired by Snowy Hydro in 2015. The reported capital cost found in a contemporaneous source is A$500 million; this appears to refer to the original greenfield build of the 667 MW station. Fixed O&M was not found as a plant-specific disclosed value, so an AEMO/Aurecon OCGT benchmark was used. Heat rate and variable O&M were taken from the AEMO/Aurecon 2024 Energy Technology Cost and Parameters Review for large GTs / OCGT-type plant. Emissions intensity is a fallback default. Capacity used for per-MW calculations is 667 MW for the whole station, not the DUID subtotal.

Sources