Colongra (CG4)

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
$194.33/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)

Snowy Hydro and project profile sources describe Colongra as an existing in-service / operating peaking power station (Snowy Hydro, 2015-2019; Power Technology profile).

Region NSW1
Coordinates -33.20989, 151.54265 (AI)

Global Energy Monitor project page lists site coordinates -33.209894, 151.542652.

MLF 0.9792
DUID CG4
Owner Snowy Hydro Ltd
Commissioned —
Expected closure 2070
Closure date —
Technology Turbine - OCGT
Fuel Fossil - Natural Gas Pipeline
Gas turbine OEM Alstom
Turbine / engine model GT13E2
Equipment confidence medium
Stats window
22 Jul 2026 22:05 → 23 Jul 2026 22:05 AEST

Dispatch & revenue

22 Jul 2026 22:05 → 23 Jul 2026 22:05 AEST

Energy revenue (× MLF)
$0
FCAS revenue (× MLF)
$0
FCAS volume
— MWh
Dispatched
— MWh
Available
1,082.8 MWh
Curtailed
1,082.8 MWh
Curtailment
100.0%
of available
MLF used
0.9792
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.
  • State of charge — INITIAL_ENERGY_STORAGE (MWh at interval start) from UNIT_SOLUTION, published for bidirectional/storage units. Next-day data — the SOC line lags real time by up to a day.
  • 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
2026-07-01 0.9792

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
$194.33/MWh
Capex total (greenfield)
$307.68M

Shown in table
$307.68M (2026 real AUD)

Reported / source value
$220.30M (2015 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Provides the only plant-specific reported dollar figure found, but it is an acquisition price rather than original capex.

Reference
Snowy Hydro Limited Consolidated Financial Report for the reporting period ended 2 July 2016 (high confidence)
Source recorded 07 Jun 2026
Capex refurbishment
—
Capex / MW derived
$1,699,898

Shown in table
$1.70M (2026 real AUD)

Reported / source value
$1.22M (2015 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).
Fixed OPEX (annual)
$51.78M

Shown in table
$51.78M (2026 real AUD)

Reported / source value
$34.25M (2015 nominal)
Table total may differ if recalculated from $/MW × registered capacity after CPI adjustment.
Fixed OPEX / MW-yr
$286,078

Shown in table
$286.1k (2026 real AUD)

Reported / source value
$204.8k (2015 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
AEMO-linked review value used as fallback O&M assumption.

Reference
2023 Cost and Technical Parameters Review Final Report (high confidence)
Source recorded 07 Jun 2026
Variable OPEX / MWh
$18.35

Shown in table
$18.35 (2026 real AUD)

Reported / source value
$13.14 (2015 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
AEMO-linked review value used as fallback variable O&M assumption.

Reference
2023 Cost and Technical Parameters Review Final Report (high confidence)
Source recorded 07 Jun 2026
Fuel cost / GJ
$16.76

Shown in table
$16.76 (2026 real AUD)

Reported / source value
$12.00 (2015 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
No plant-specific gas contract price was found; retained the provided fallback.
Heat rate GJ/MWh
10.50

Shown in table
$10.50 (2026 real AUD)

How this was derived
No plant-specific heat rate was found in the searched official sources; retained the provided fallback.

Confidence: medium · Status: ai estimated · Capex basis: reported · AI checked 07 Jun 2026

Notes
No plant-specific greenfield construction cost was located in the searched owner/government sources. The available reported figure is Snowy Hydro's 30 January 2015 acquisition consideration for Colongra, which is not the original build capex. O&M and technical assumptions fall back to AEMO/Aurecon review values for gas turbine technologies.

Sources