In 1910 the Mixed Fiscal School was inaugurated, with its first director being Don Juan Gaona. In 1912 the women's school was separated under the direction of Mrs. Clara Jiraldo. From 1913, the sports field began to flatten, a work where a worker named Juan García Chilca lost his life. In 1920, the School Center No. 341 was inaugurated under the direction of Don Arturo García. In 1924, an outbreak of bubonic plague occurred in Pampas Grande, which had claimed seven deaths within 24 hours. Being necessary the visit of doctor Eleazar Guzmán Barrón, who directed a sanitary cord in the province of Huaraz; in order to stop the outbreak. In 1928, the School Center No. 341 was closed becoming Fiscal School No. 3378, and the Women's School Center No. 347 was inaugurated. In 1933, the southern part of the Pampas district was creates the district of Huanchay. The Fiscal School of the Victory, was inaugurated in June 1940, its first director being Mrs. Vilelmina Ardiles Quijano. In 1941, the Colcabamba district emerged from Pampas, this being the last time a new jurisdiction was created based on the Pampas territory. The Sháncac Mixed Prosecutor's School was opened in May 1950 under the direction of Delia Dextre Llanos. In 1965 the Colegio Nacional Mixto San Jerónimo was founded. Before the 1970 earthquake Pampas Grande had a post office and telegraph service.