Gran Tulum Aqueduct corruption investigation

A judicial investigation into the construction of the Gran Tulum Aqueduct in San Juan, Argentina, is examining potential irregularities regarding contracting, material usage, and overpricing. The probe, which began in December 2025, has involved searches at the offices of Krah América Latina, a major supplier for the project.

During a formalization hearing in mid-October 2026, legal representatives for former OSSE president Sergio Ruiz challenged the jurisdiction of provincial courts, requesting the case be moved to federal jurisdiction. Ruiz and his defense characterized the investigation as a “political” and “false, rigged process.”

The proceedings faced delays when former governor and current national senator Sergio Uñac and national deputy Cristian Andino failed to appear at the initial hearing. While defense lawyers cited professional commitments, Prosecutor Sebastián Gómez criticized the acceptance of these absences and indicated intentions to request the removal of parliamentary immunity for both men. A new hearing has been scheduled for November 10, 2026.