Gladstone transmission scope changes as Larcom Creek line leaves PTI

What changed

Powerlink says its June 2025 Final Assessment Report included construction of the Gladstone West–Larcom Creek line. The current PTI scope excludes that construction, reflecting investment time horizons and updated demand forecasts. The corridor easement remains because of its strategic importance for regional supply security.

This is a useful correction to the broad pipeline picture. BBI’s June coverage described Stage 2 as a roughly 95 km Bouldercombe–Larcom Creek line. Readers using that earlier description should distinguish it from the present directed works. The current construction scope does not automatically cover every asset discussed in earlier planning material.

The continuing use of the Bouldercombe to Larcom Creek project name can obscure that distinction. A project label is a reference point; the latest component list is the better guide to what is included. The dated PTI table provides the clearest current boundary for this update.

The retained network scope

The retained Stage 2 line connects Bouldercombe to Gladstone West. The directed table specifies an 80 km, high-capacity, double-circuit 275 kV line rated at 2,091 MVA. It also includes Bouldercombe substation work, establishment of Gladstone West Substation and related line and remote-end works.

Stage 1 remains the Calvale–Gladstone West–Calliope River reinforcement. Its project hub describes an 87 km line and upgrades at both end substations, including expanded switching infrastructure. Powerlink’s current status table records construction as commenced.

The main Gladstone Project page separately describes establishing Gladstone West Substation, building the Bouldercombe connection and acquiring the onward easements. This reinforces the need to track the line, substation and corridor as distinct components rather than infer one continuous construction commitment.

For estimating and business planning, a component-based view is more useful than a single route headline. Different interfaces can require different equipment, access arrangements, construction sequences and commissioning preparation. Those are capability considerations; the scope update does not identify new purchase orders for them.

Confirmed stage and future gates

Stage 1’s community hub reports receipt of its Ministerial Infrastructure Designation, with the designation notice published on 24 July 2026. It also reports a federal EPBC approval decision in June 2026. Those approvals relate to that project and should not be applied across Stage 2.

The current delivery table anticipates Stage 1 commissioning by March 2029. Stage 2 construction is expected from October 2027, with Gladstone West Substation targeted for June 2029 and the full Stage 2 scope targeted for August 2030. These are forward dates, not evidence that those assets are operating.

The Stage 2 community page still carries the broader 95 km description and discusses planning and environmental pathways. Its background remains useful, but the newer dated PTI table and main project page govern the directed scope used here. This article does not assert that every Stage 2 approval has been granted.

The practical watch is therefore component-specific evidence: approval notices, updated design information, contractor announcements and revised delivery dates. One stage reaching construction does not put every related corridor at the same point.

How suppliers connect to delivery

Powerlink’s main project page says principal contractors manage most construction-phase procurement, with some specialised goods and services purchased directly by Powerlink. Suppliers should follow that delivery route when interpreting the changed program.

The April 2026 Central Queensland participation fact sheet identifies Gateway by ICN as the primary platform for registering supplier capability and capacity. Registration adds details to the regional supplier register, which is shared with principal contractors. Relevant suppliers may later be approached for information, tender scopes or quotations.

The current ICN project listing warns that registration does not guarantee procurement participation and that scope, timing and delivery methods can change. Its purpose includes making capability visible; an expression of interest is not a confirmed subcontract.

Potentially relevant capability includes line and substation civils, high-voltage installation, survey support, logistics and testing. Businesses should describe actual experience, workforce availability and regional delivery capacity against a verified requirement. This is a capability lens, not a list of newly released or awarded packages.

The commercial meaning of a smaller boundary

BBI’s assessment is that suppliers should revise assumptions before revising forecasts. Removing a line from the current PTI changes the basis for estimating work volume, but it does not establish the net cost impact or identify which individual supplier arrangements are affected.

An easement has a different commercial role from an erected and commissioned line. Securing corridor access can preserve a future option without creating immediate demand for towers, conductors or installation crews along that section. Treating the two as interchangeable risks overstating the near-term market.

The retained Gladstone West work also means the update should not be read as withdrawal of the entire Stage 2 program. A narrower construction boundary can coexist with important substation and network-interface work. Businesses need to assess where their capability fits within the retained components.

Powerlink’s April participation guidance describes a tiered approach that prioritises local and Indigenous businesses, including businesses within 125 km of a project corridor or representing affected Traditional Owner groups. Local workforce, skills development and local sourcing can contribute to demonstrated benefits. These principles provide positioning context, not an entitlement to work.

What to watch next

The next useful updates will show how the directed scope translates into actual delivery. Watch for revised Stage 2 project material, component-specific approvals and official procurement information that names the relevant asset and requirement.

Powerlink’s connection information accepts enquiries for the Bouldercombe–Gladstone West line and radial connections at Gladstone West and Larcom Creek. That enquiry pathway should not be taken as approval, financing or construction commencement for an individual generation or industrial project.

For contractors, the immediate discipline is to reconcile old route descriptions with current scope, keep capability details accurate and check each package’s status before committing bid effort. For industrial readers, watch physical delivery and connection milestones separately from the broader network plan.

The confirmed news is a scope distinction with practical consequences for pipeline interpretation. Future construction, commissioning and any later investment in the removed section require their own evidence.

What industry should watch next