Public information on the ACS data center power grid

The Provincial Service of Zaragoza, under the Department of Economy, Competitiveness and Employment of the Government of Aragon, has opened for public consultation the request for prior administrative and construction authorization and the environmental impact study for the electrical infrastructure that will supply a new data center for ACS DC Infra La Puebla, SL. The announcement is published in the Official Gazette of Aragon number 190, dated September 30, 2026, section V (Announcements), with reference BOA20260930019 and file ZA-SP-ENE-AT-2025 258. Interested parties have a period of thirty days from the day following publication to submit allegations.

The procedure is based on Article 125 of Royal Decree 1955/2000, of December 1, which regulates the activities of transport, distribution, marketing, supply, and authorization procedures for electrical energy installations, and Article 28 of Law 11/2014, of December 4, on Environmental Prevention and Protection of Aragon, which activate public information and participation and the environmental impact assessment of the project.

The promoter is ACS DC Infra La Puebla, SL, with registered office at Avenida Santiago number 50, 28050 Madrid. The action is part of the General Interest Plan of Aragon “Installation of a data center in the municipality of La Puebla de Alfindén”, declared an investment of regional interest with general interest for Aragon by agreement of the Government of Aragon on June 27, 2025, published via Order PEJ/865/2025, of July 10, and initially approved by Order FOM/1698/2025, of December 1. Order VFL/1184/2026, of July 31, incorporated the electrical projects now being presented into the plan.

A 220 kV substation in Villamayor de Gállego

The projected installation includes a remote substation (SET Remota) of 220 kV located in polygon 30, plot 133, of the municipality of Villamayor de Gállego. Its technical characteristics are:

2 transformation bays 220/400 kV (220 kV side) and double 220 kV busbars.
1 bay for the reactor and one busbar coupling bay.
2 line bays at 220 kV exiting towards the SET CD Campus.
1 bay at 30 kV for auxiliary services, with 2 transformers of 250 kVA each.

The announcement specifies that the 2 line bays at 400 kV and the two 400/220/30 kV transformers of 300 MVA each are not the subject of this file.

An underground line of 13.5 kilometers to La Puebla de Alfindén

The high-voltage line (LAST) runs between the 400/220 kV SET Remota and the 220/30 kV SET CD Campus, with an approximate length of 13,500 underground meters and two circuits with conductor RHZ1+2OL 127220 kV 1x1600 MAl +H250. The route crosses:

Plots of polygons 30, 31, 39, 40, 41, 42, 45, 46, 47, 56, 57, and 58 of Villamayor de Gállego.
Plots of polygons 9 and 1 and plots 7424402XM8172S and 7721501XM8172S of La Puebla de Alfindén.

The declared purpose is the electrical supply of the new data center located in La Puebla de Alfindén, with a budget of 53,710,643 euros.

Allegations, deadlines, and impacts on livestock routes

The execution project may be examined by any interested party at the electronic headquarters of the Government of Aragon, and allegations must be addressed to the Provincial Service of Zaragoza, Electrical Energy Section, at paseo María Agustín number 36, door 14, ground floor, Zaragoza, citing as reference “Public Information. File ZA-SP-ENE-AT-2025 258”.

The announcement also lists the impacts on public domain assets, specifically the Vereda de Valmayor a Farlete, a classified livestock route in the municipality of Villamayor de Gállego. The text was signed in Zaragoza on September 14, 2026, by the director of the Provincial Service of Zaragoza, Ana Elena Romero Aznar.

The electrical infrastructure is the piece that connects the future data campus with the transmission network and conditions both the project schedule and land use in the surroundings of Zaragoza. The procedure now opens the door for owners of the affected plots in a dozen polygons and local entities to submit allegations before the authorization and environmental assessment are resolved.

Source: Official Gazette of Aragon, number 190, of September 30, 2026, section V (Announcements), b) Other announcements (official reference: BOA20260930019).