CORPUS CHRISTI, Texas — A proposed brackish groundwater deal that could bring up to 10 million gallons a day into Corpus Christi’s water supply got its first public airing Tuesday — and raised immediate concerns about transparency and public oversight. The deal involves the South Texas Water Authority (STWA) and Seven Seas Water Group, a private company that already operates Texas’ first public-private desalination plant in Alice. “Every time we get a request for documents involving Seven Seas, I have to go through their counsel for permission,” Zahn told the council. Corpus Christi Water’s interim chief operating officer Nick Winkelmann said the report offered basic quality data but lacked key technical details. But the STWA proposal could last anywhere from 30 to 60 years — with Corpus Christi never owning the plant.