Corsan triggers emergency plan after cracks found at Arroio São Luiz dam in São Marcos

• Corsan activated an emergency action plan for the Arroio São Luiz dam in São Marcos following cracks in the spillway and buttress.
• Roughly 170 residents were evacuated from a risk area. Lodging costs are being covered by the utility.
• Reservoir drawdown started at 12:47 p.m. Wednesday. Pumps were mobilized to speed water removal and reduce pressure on the structure.
• Stored volume fell to about 135,000 cubic meters at 10:17 p.m. from roughly 138,000 cubic meters earlier Wednesday.
• A technical safety assessment is due by Friday, the 25th. Return timing for residents remains uncertain.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Companhia Riograndense de Saneamento Corsan published the original content used to generate this news brief on September 24, 2026, and is solely responsible for the information contained therein.