As mayor of the city he was involved in numerous projects . He built a new aqueduct with a modern filtration plant under the direction of Ing . Monsiur Lefranc . He also built the new Mayagüez City Hall under the direction of the engineers/architects Adriano González Martínez , Alonso Aguilar and Ignacio Flores . Under his terms as mayor other projects were also built such as , the Luis Muñoz Rivera Park , he converted the old municipal jail into the Muñoz Rivera School , which now serves as the Hostos School of Law , he rebuilt the historic San Antonio Hospital and he also rebuilt the Mariano Riera Palmer School which had been mostly destroyed by the earthquake of 1918 . During his second term as mayor he had almost all the main streets of the city paved with tar , later on the streets were paved with concrete
earthquake of 1918
1918 San Fermín earthquake
Juan Rullán Rivera