Plan

Five gates. Each with a measurable threshold. The project does not advance to the next gate until the current one is genuinely cleared. Failing a gate is an honest result; failing one and pretending otherwise is how megaprojects collapse.

Gate 0 — Consent

Threshold: A formal partnership agreement with each Traditional Owner group whose land would host the first-node footprint. Heritage clearance under the relevant state or territory framework. An equity or revenue-share structure that gives Traditional Owners an enduring stake, not a one-off payment. A community engagement record that survives external review.

This is structural. Without Gate 0 there is no Gate 1.

Gate 1 — Node

Threshold: A first node with:

Site control over ≥50 km²
Bankable solar + storage capacity that achieves delivered firm cost A$80–120/MWh on-site
An anchor customer with a ≥15-year contract for ≥100 MW continuous load
Environmental approvals pathway under the Environment Protection and Biodiversity Conservation Act (EPBC) and state frameworks
Water supply confirmed for first-stage operations

Gate 1 is when the concept becomes a project. Everything before Gate 1 is proposal.

Gate 2 — Depth

Threshold: First node operating. Second anchor customer or industrial precinct contracted. Water solution scaled or expansion pathway proven. Logistics and workforce model demonstrated. Node-level internal rate of return (IRR) within sponsor target.

Gate 3 — Replicate

Threshold: Second node FID with capex per MW at least 15% below first node. Third node site selected and consent process underway. Supplier base operating at corridor scale. A financing template repeatable without bespoke government underwriting.

Gate 4 — Connect

Threshold: At least three nodes operating. Case for inter-node infrastructure (transmission, fibre, water transfer, freight upgrades) supported by demonstrated demand rather than projected demand. Coordinated planning instrument across affected jurisdictions.

First-Node Candidates

The corridor does not commit to a single first node. Three candidates warrant serious consideration, each with a distinct profile.

Candidate	Solar Resource	Existing Grid	Workforce	Water	First-Node Fit
Mount Isa (QLD)	~2,200 kWh/m²/yr	CopperString 2.0 from ~2029	Established industrial	Lake Julius, Cloncurry River	Strongest on existing infrastructure and grid connection
Tennant Creek (NT)	~2,400 kWh/m²/yr	Off-grid (local TC Power System)	Smaller, mining services	Limited; requires development	Strongest on resource; requires more infrastructure build
Kalgoorlie (WA)	~2,150 kWh/m²/yr	SWIS interconnected	Deep mining industrial base	Established (Mundaring pipeline extension)	Strongest on workforce and existing services; furthest from CopperString connection

Each candidate would produce a defensible Gate 1. The site does not select between them because the selection depends on inputs not yet in place — Traditional Owner engagement outcomes, anchor customer preferences, and site-specific capex from actual EPC contact.

Scale by Gate

Gate	Timeframe	Cumulative Capex (Indicative)	Installed Capacity
Gate 1	2028–2032	A$3–8B	1–2 GW
Gate 2	2033–2038	A$15–40B	5–15 GW
Gate 3	2038–2046	A$60–150B	25–60 GW
Gate 4	2046–2055	A$150–300B+	80–120 GW

Cumulative capital deployment from 2026 to 2055 as an area chart, with a base case and a wider stretch case. Gate markers at 2028 for Gate 1 at A$3–8B, 2033 for Gate 2 at A$15–40B, 2038 for Gate 3 at A$60–150B, and 2046 for Gate 4 at A$150–300B and above. — Indicative envelopes only. Actual deployment is contingent on gate decisions.

These are indicative envelopes, not commitments. Gate 3 and Gate 4 numbers exist to show the shape of the trajectory if the first two gates hold. They are not defended as bankable.

Capital Consequence

Different tranches of the capital stack are naturally suited to different parts of the corridor.

Sponsor equity + development capital. Early-stage risk capital. Australian or partner-country infra sponsors with resources or energy operational history.
Anchor customer offload. Hyperscalers with training/batch demand co-invest in the power. Precedent: Microsoft, AWS, Google direct participation in generation projects in Ireland, Sweden, Chile.
Strategic co-investors. Sovereign wealth (partner-country), industrial partners (offtake-aligned).
Project debt. Commercial bank debt, 60–70% of stack once contracted cash flows exist.
Concessional layer. CEFC, NRF, ARENA for first-of-kind elements. Federal Capacity Investment Scheme for underwriting.
Indigenous capital. Indigenous Business Australia, Indigenous Land and Sea Corporation, Aboriginal Corporations holding equity in nodes on their Country. Not compensation — participation.

A first-node capital stack as a horizontal stacked bar, in six tranches: sponsor equity and development capital, anchor customer offload, strategic co-investors, project debt, a concessional layer, and Indigenous capital participation. — Illustrative structure. Real tranches depend on sponsor identity, offtake terms, and site-specific capex.

Government role: enabler, not lead funder. Sets approvals pathway, underwrites first-of-kind risk, coordinates land tenure and native title frameworks across three jurisdictions, co-funds enabling infrastructure where it is shared. Government is not the right capital for the generation, storage, compute, or processing themselves — those should be private and institutional.

The presence of government as co-investor signals strategic alignment. The absence of private and institutional capital would signal the project is not ready.