 In 1623 when the work was still in an unfinished state the Viceroy the Marquis de Gelvez (1621–24) to test the utility of the canal directed the work to be suspended and the waters, including that of the River Cuauhtitlan, which was then discharging through the tunnel, to be once more diverted into the lakes of the valley.This caused a flood in 1627 and the municipal government petitioned the Viceroy Cerralvo (1624–35) to rectify the trouble and avert a disaster.The viceroy entrusted the matter to Boot, Martínez, and several others who had studied the situation, and all submitted reports.