Public information on the Huelva-Aznalcázar water pipeline, section of the Huelva-Mérida corridor

The Industry and Energy Area of the Government Delegation in Andalusia has opened the public information process for the application for administrative authorization, approval of the execution project, and specifically, the declaration of public utility for the Huelva-Aznalcázar segment of the Huelva-Mérida hydrogen pipeline, promoted by Enagás Infraestructuras de Hidrógeno, S.L.U. The announcement is published in the Official State Gazette (Boletín Oficial del Estado) no. 241, dated September 30, 2026, section V-B (Other official announcements), page 51358, with official reference BOE-B-2026-31654 and file number 149/2026.

A project of common European interest

The action is officially named “PCI 9.1.3. Internal hydrogen infrastructure in Spain. Huelva-Mérida section, Huelva-Aznalcázar segment” and is processed under Regulation (EU) 2022/869, on guidelines for trans-European energy infrastructure, in relation to Law 34/1998, of October 7, on the Hydrocarbons sector (thirty-eighth additional provision and title V), and Royal Decree 1434/2002, of December 27, which regulates transport activities and authorization procedures for natural gas installations.

The procedure also includes the ordinary environmental assessment, in accordance with Law 21/2013, of December 9, on Environmental Assessment, and Law 39/2015, of October 1, on the Common Administrative Procedure. The authorization resolution corresponds to the General Directorate of Energy Policy and Mines of the Ministry for the Ecological Transition and Demographic Challenge, while the environmental impact statement is the responsibility of the General Directorate of Environmental Quality and Assessment of the same department.

Route, municipalities, and technical characteristics

The infrastructure is a pipeline for the transport of hydrogen that starts at position HVP-040, in the municipality of Palos de la Frontera, and ends at position HVP-036, in Pilas. Its main data are:

• Diameter: 30 inches.
• Total length, considering the orography: 59.116 kilometers.
• Maximum operating pressure (MOP): 94 bar.
• Municipalities of Huelva: Palos de la Frontera, Moguer, Lucena del Puerto, Bonares, Almonte, and Hinojos.
• Municipalities of Seville: Villamanrique de la Condesa and Pilas.
• Valve positions: HVP-040, HVP-039, HVP-038, HVP-037, and HVP-036.

The project incorporates medium and low voltage electrical connections connected to the E-Distribución network, an autonomous photovoltaic system of 7.2 kWp for position HVP-038, a 64FO communications cable housed in a bi-tube, a supervision and control system (SCADA), and four impressed current cathodic protection installations.

Budget and impact on owners

The total budget amounts to 95,694,704.00 euros, of which 82,769,368.00 euros correspond to the province of Huelva and 12,925,336.00 euros to that of Seville. The announcement includes the parcel maps and the specific and individualized list of affected assets and rights, with holders such as the Almonte City Council, the Regional Government of Andalusia, Forestal Alfer, S.L., Campos de Alconeras, S.L., Enagás Transporte, S.A.U., Moeve, S.A., the Ministry of Transport and Sustainable Mobility, and numerous private owners.

The impacts are specified as:

• Permanent right-of-way easement over a 4-meter strip, two meters on each side of the pipeline axis.
• Prohibition of plowing deeper than 50 centimeters and planting tall-stemmed trees within that strip.
• Prohibition of works or constructions within 10 meters of the pipeline axis.
• 3-meter easement for connection cables and cathodic protection beds.
• 15-meter flight easement for associated power lines.

Fifteen-day period and submission of allegations

The holders of affected land and rights, as well as those who may have been omitted, have a period of fifteen days starting from the day following the publication of the announcement to examine the project and the parcel maps. The documentation can be downloaded from the headquarters of the Ministry of Territorial Policy and Democratic Memory and consulted at the affected city councils.

Allegations shall be addressed to the Industry and Energy Area Department of the Government Sub-delegation in Huelva or to the Industry and Energy Area of the Government Sub-delegation in Seville, or via the Electronic Registry of the General State Administration, citing “Allegations to the public information procedure File 149/2026”. The announcement was signed in Seville, on September 22, 2026, by the director of the Industry and Energy Area of the Government Delegation in Andalusia, José Manuel Almendros Ulibarri.

The publication opens the formal channel for affected parties to discuss expropriations and easements before the authorization is resolved, a preliminary step to the construction of the first segment of the hydrogen corridor that will connect Huelva with Mérida.

Source: Official State Gazette, no. 241, of September 30, 2026, section V-B (Other official announcements), page 51358 (official reference: BOE-B-2026-31654).