Juan José Ríos, Sinaloa
Juan José Ríos () is an agricultural city located in Northern Sinaloa, Mexico. It is divided in two municipalities, where its major part is located in Guasave Municipality, and the rest is in Ahome Municipality. It had a population of 27,938 inhabitants (including city's both parts in Guasave and Ahome Municipalities), according to the 2010 census. History. Ejido Las Vacas (formerly named Juan José Ríos), was founded on 21 September 1938 by presidential decision, by the then President Lázaro Cárdenas del Río. It had an area of 16,420 ha and 179 inhabitants; of which 64 were  ejidatarios. Between the years of 1946 and 1951 several peasants from Los Mochis, 18 de Marzo and San Miguel Zapotitlán towns, Ahome Municipality; and La Louisiana town, El Fuerte Municipality, requested to the Agricultural Department that they be granted with plots to sow in Ejido Las Vacas. And between the years of 1953 and 1954, Agricultural Department granted all of the 672 people who had requested plots. Several towns in El Fuerte and Choix Municipalities were affected when Miguel Hidalgo Dam construction started. Its construction was divided in two phases: the first one was in the years of 1952 to  1956, and the second one in the years of 1956 to 1964. The affected towns by dam construction in El Fuerte Municipality were: El Mahome, San Felipe, Gipago y Peñasco, Rincón de Sinaloita and Los Mezcales. The affected towns in Choix Municipality were: El Pajarito, Baca, Caballihuasa, Toro, Picachos and El Sauz. The towns which were affected, their inhabitants were located in different "ejidos", as it was in Ejido Las Vacas and its nearby "ejidos". On 21 February 1955, by presidential decision, it was approved an urban area construction in Ejido Las Vacas, for all the affected people by the  dam construction. On 28 February 1955, the 637 peasants who were evacuated from the 11 "ejidos", which would be flooded by Fort River when the grout curtain of Miguel Hidalgo dam was closed. Affected people were given a 10 ha plot to sow and another plot for living in Ejido Las Vacas. Also, in Ejido Las Vacas were living the original 64 "ejidatarios", they lived in Old Las Vacas, as they named the oldest part of Ejido Las Vacas. However, locating the 1375 "ejidatarios" with their families, it needed another presidential decision to locate in 500 ha each "ejidatario" giving  them a 1,600 m (40 m x 40 m) plot for living, including as well as streets, schools and other public services, becoming an urban area, which one were named Juan José Ríos, and it became in a "sindicatura". It was the Mexico's biggest ejido, it had an area of more than 16,400 ha. Juan José Ríos is named after General Juan José Ríos, Mexican politician and soldier, during the Mexican Revolution. Engineers who planned the urban area construction selected this name. Also this General was the last owner of this land. On 13 July 1989, the then Governor  of Sinaloa Francisco Labastida Ochoa, made public Sinaloa State Congress approved Juan José Ríos as a city. Sindicatura. In Sinaloa, municipalities are divided into smaller entities named "sindicaturas" (), and this one is divided into "comisarías" (). A sindicatura male leader is named "Síndico" () or a female leader is named "Síndica" (). A comisaría male leader is named "Comisario" () or a female leader is named "Comisaria" (). Juan José Ríos "sindicatura" is located in northwestern Guasave Municipality. The seat of this "sindicatura" is the homonymous city. It has an area of 960.24 ha, it is 27.71% of the total area of Guasave Municipality, that  is why it is the second largest "sindicatura" of Guasave Municipality, the biggest one is Central Sindicatura of Guasave city. Juan José Ríos "sindicatura" is divided into Bachoco and Ejido Campo 38 "comisarías". Municipality. Since a long time ago, Juan José Ríos inhabitants have requested many times of the Sinaloa Government, to create Juan José Ríos Municipality. Juan José Ríos Municipality would be formed of: Administrative divisions. Juan José Ríos Municipality seal would be the homonymous city, and it would be organized as: Geography. It located in Northern Sinaloa, in Fort Valley region, 20 km southwards Los Mochis, 43 km  northwards Guasave and 208 km northwards Culiacán, which is Sinaloa state capital. Its coordinate is 25°45'26 latitude north and 108°49'18 longitude west. Its altitude is 12 m above sea level. Demographics. It had a population of 27,938 inhabitants (including both parts of the city − Guasave and Ahome municipalities); in which 13,761 were males and 14,177 were females, according to the 2010 census. Climate. Its climate is generally warm and humid. Its average annual temperature is . Its minimum annual temperature is and its maximum annual temperature is , with May to October the hottest season. The average  rain precipitation is 382 millimeters annually, with July to October the rainy season.