In 1901, Manuel Vizcarra was named Justice of the Peace for the town that would become Mexicali. The group of homes was part of the town of Los Algodones. In 1902 he was designated sub tax-collector for Ensenada and assistant judge of Mexicali sub-ordinate to the Justice of the Peace of Los Algodones. He did not accept the offer of assistant judge and on September 5, 1903 Benigno González took the position. However, March 14, 1903, the date Vizcarra was offered the position, is considered (since 1968) as the date Mexicali was founded.
In 1902 formed part of the commission organized to select names for Mexicali and the town across the border, Calexico, California as sheriff of Los Algodones. Vizcarra supported the proposal that the name had to be Mexicali in response to journalist Leroy Holt's proposal for Calexico for the neighboring town.