Waterworks Systems - Isabela PR Municipalities across Puerto Rico asked for the PRRA’s help with improving existing water systems and building new ones. The municipality of Isabela benefited from this help—between 1937 and 1938, the PRRA improved and built waterworks and irrigation systems in the community. Geoff Burrows writes that, "From Adjuntas to Utuado, the PRRA repaired, modernized, and constructed drinking water systems, sewer systems, and storm drains across the island. By 1938, the PRRA had: repaired 15 municipal waterworks; built new water systems and filter plants in Comerio, Isabela, Patillas, and San Lorenzo; built eight water systems for rural housing and eight for vocational schools; and one...