This work considers the possibility of using the absolute depressions “Bajo del Gualicho” (- 72 m) and “Bajo de San Julián” (-107m), Río Negro and Santa Cruz Provinces respectively, for tidal electrical generation by means of a connection with the Atlantic Sea in Argentinean Patagonia Region . This would allow the formation of large lakes that would create an "artificial albúfera" which will cover an area of about 1234 km2 in Gualicho and 650km2 in San Julián. These lakes will be exposed to tidal by means of an array with combination of a channels and four tunnels/chan. Gualicho and Only Tunnels in San Julián, which will be located between the sea and the lake. Taking the reference of Puerto San Antonio Este for Gualicho, the average tidal range reaches 6.73m , lasting 6 hs. 20 min. . In the case of San Julián, the tidal reaches 7,45m and lasting 6hours and 45minutes. This project is made by means of a multidisciplinary research group of UNCo, with advice of Hydraulic Laboratory of University of La Plata and Renewable Energy Group of Academic Unit of Caleta Olivia , UNPA.