The gargoyles have been there for 900 years and they were last checked and cleaned in 2014. They have now become clogged and the water is no longer flowing properly. “Contamination can enter, such as algae growth, leaves can be added, if there is leaves, plants will grow in, those plants can become trees and then the entire pipe becomes clogged, so that the water simply cannot be drained anymore,” says Gerrit Heenck. the recruiter of the area. Maintenance is necessary. “Otherwise, water problems can arise: on the street, but also in the cellars.”