AVE Vitoria-Bilbao-San Sebastián: green light for high-voltage power line

Key data

The Vitoria-Bilbao-San Sebastián AVE has just overcome one of its most critical regulatory milestones. The General Directorate of Quality and Environmental Assessment has issued, through Resolution of April 16, 2026 (BOE-A-2026-9070), a favorable environmental impact report for the Hernani-Tolarieta high-voltage line and the Tolarieta substation, the electrical infrastructure that will power the new Basque high-speed rail line.

This report is not a minor formality: it is the essential prerequisite for the project to obtain administrative authorization and move toward execution. Without it, ADIF-AV could not operate machinery or award construction contracts. With it, the project enters the phase of final authorization and, subsequently, construction.

What does this regulation establish?

The resolution contains the environmental pronouncement on two differentiated but complementary infrastructure within the Basque AVE project:

The report declares the environmental impact as favorable, which means the project can proceed, but subject to conditions. The resolution establishes corrective measures that ADIF-AV must comply with at two distinct moments:

• During construction: application of the corrective measures established in the report to minimize impact on the Hernani and Tolarieta area.
• During operation: maintenance of the required environmental conditions once the infrastructure is operational.

The territorial scope is limited to the Basque Country, specifically to the municipalities in the area of Hernani and Tolarieta.

Economic and operational impact

For ADIF-AV and companies in the sector, this report has direct operational and economic consequences:

• Unblocking the authorization process: the favorable report opens the door to the final administrative authorization of the project. Without this step, investment in the Basque high-speed rail line could not materialize into actual construction.
• Environmental compliance obligations: construction companies and contractors that are awarded contracts must incorporate into their bids and work planning the cost of the required corrective measures. Ignoring them is not an option: non-compliance can halt work or generate liabilities.
• Contracting opportunities: approval of the environmental report activates the public contracting chain linked to this major infrastructure. Companies in the construction, electrical, and railway sectors should monitor the procurement procedures that will follow.
• Resource planning: interested contractors must provide in their technical teams the environmental management capacity required by the report, both in the construction phase and in the operation phase.

Who does it affect?

• ADIF-AV: as the project promoter, it is the main party bound by the conditions and corrective measures of the report. It must ensure compliance in all phases.
• Construction companies: those that bid or are awarded contracts for the construction of the power line and substation must comply with the established environmental conditions.
• Contractors and subcontractors: the entire supply chain linked to project execution is subject to the obligations derived from the report.
• Railway sector: companies linked to the Vitoria-Bilbao-San Sebastián AVE as a whole, given that this electrical infrastructure is a necessary condition for the operation of the line.
• Electrical sector companies: especially those specialized in high-voltage lines and substations, which are the natural candidates to execute this work.

Practical example

A construction company specialized in electrical infrastructure that wants to bid for construction contracts for the Hernani-Tolarieta line or the Tolarieta substation should take the following into account:

The favorable environmental report has already been issued, which means the project can move toward final administrative authorization. When ADIF-AV publishes the tender specifications, these will necessarily include the conditions and corrective measures established in the Resolution of April 16, 2026.

This company must demonstrate in its technical bid the capacity to execute the work while respecting said corrective measures in the municipalities in the Hernani and Tolarieta area (Basque Country). If awarded and does not comply with environmental conditions during construction, ADIF-AV can demand contractual liability and the General Directorate of Quality and Environmental Assessment can intervene to halt the work.

The time to prepare is now, before the specifications are published: review the report, evaluate the environmental technical requirements, and size the environmental management team needed.

What should companies do now?

1. Read the complete environmental report: download and analyze the Resolution of April 16, 2026 (BOE-A-2026-9070) to know exactly what conditions and corrective measures it establishes. This document will be the reference in any future procurement.
2. Identify if your company can bid for the contracts: if you are a construction company, electrical company, or contractor in the railway sector, evaluate whether your technical and environmental capacity meets the requirements that will derive from the report.
3. Prepare environmental management capacity: incorporate or strengthen in your technical team the environmental manager position, necessary to comply with the corrective measures required in both construction and operation.
4. Monitor ADIF-AV procurement procedures: the favorable report unblocks the authorization process. Construction contracts will be published on the Public Sector Contracting Platform. Set up alerts to not miss deadlines.
5. Review the affected territory: if your company operates or has interests in the municipalities in the Hernani and Tolarieta area (Basque Country), verify whether the execution of the work may affect your activities or facilities.